sliding bearing made of synthetic resin

专利摘要:
SLIDING BEARING MADE OF SYNTHETIC RESIN. It is a sliding bearing 1 that includes: a top casing 2; a lower coating made of synthetic resin 3 which is superimposed on the upper coating 2 so as to be able to rotate about a geometric axis O in a circumferential direction R with respect to the upper coating 2; a sliding bearing piece made of synthetic resin 5 is arranged in an annular space 4 between the upper lining 2 and the lower lining 3; and a sealing member made of synthetic resin 8 for sealing the respective other annular end portions, which communicate with the outside, from a span 6 on an inner peripheral side and a span 7 on an outer peripheral side in one direction radial X between the upper casing 2 and the lower casing 3, the span 6 and the span 7 respectively communicate with the annular space 4 at their annular end portions.
公开号:BR112013030402B1
申请号:R112013030402-2
申请日:2012-05-23
公开日:2021-06-08
发明作者:Kouichi Morishige；Takashi Horiguchi
申请人:Oiles Corporation；
IPC主号:

专利说明:

FIELD OF TECHNIQUE
The present invention relates to a thrust sliding bearing, and more particularly to a sliding bearing made of synthetic resin which is suitably incorporated as a sliding bearing of a shock absorber type suspension (Macpherson type) in a four-engined vehicle. wheels. TECHNICAL BACKGROUND
In general, a damper-type suspension is primarily used for a front wheel of a four-wheel motor vehicle and is then situated so that a damper assembly that incorporates a hydraulic shock absorber in an outer cylinder integrated with a main rod is combined with a suspension coil spring. Among other suspensions, there is a type in which when the damper assembly rotates with the coil spring in the steering operation, the damper assembly connecting rod rotates and a type in which the connecting rod does not rotate. In one type or the other, there are cases where, instead of a rolling ball bearing, a sliding bearing made of synthetic resin is used between a mounting member on the vehicle body and an upper spring seat of the spool spring. so that they allow smooth rotation of the shock mount.
PRIOR ART DOCUMENTS PATENT DOCUMENTS Patent Document 1 JP-A-2001-27227 Patent Document 2 JP-A-2001-27228 Patent Document 3 JP-A-2001-27229
In relation to a synthetic resin plain bearing which includes a synthetic resin bottom casing, a synthetic resin top casing superimposed on this bottom casing, and a synthetic resin plain bearing means disposed in a space between the top casing and lower, in Patent Document 1, a sliding bearing made of synthetic resin is proposed, which is composed of an outer resilient sealing means disposed on an outer peripheral side between the upper and lower linings and an inner resilient sealing means disposed at an inner peripheral side between the top and bottom liners; in Patent Document 2, a sliding bearing made of synthetic resin is proposed, which is comprised of an outer sealing means disposed on an outer peripheral side in the space between the upper and lower linings and an inner labyrinth sealing means disposed at an inner peripheral side in the space between the upper and lower skins and in Patent Document 3, a sliding bearing made of synthetic resin is proposed, which is composed of a resilient sealing means which is arranged in such a way as to cover an outer surface of the bottom liner and which seals the outer and inner annular openings of a space between the top and bottom liners at both the annular end portions. SUMMARY OF THE INVENTION PROBLEMS THAT THE INVENTION MUST SOLVE
Incidentally, with the sliding bearing of Patent Document 1, in order to seal the respective gaps on the inner and outer peripheral sides between the top and bottom linings, the inner resilient sealing means and the outer resilient sealing means which are separate members are arranged in the respective spans so that time is required in the assembly operation and therefore there is a possibility of causing an increase in the cleaning cost. With the sliding bearing of Patent Document 2, since the labyrinth sealing means is used to seal the inner span between the upper and lower linings, the feature of preventing the ingress of dust, muddy water and the like from the span on the inner peripheral side it is slightly inferior compared to the resilient sealing means. With the sliding bearing of Patent Document 3, provided that the resilient sealing means to seal the respective gaps on the inner and outer peripheral sides between the upper and lower linings are arranged on an outer surface of the lower lining, there is a possibility that such such as, exiting the resilient sealing means from the bottom liner when used for extended periods of time. None of these plain bearings are yet satisfactory in terms of manufacturing cost, durability and sealing ability.
The present invention has been devised in view of the aspects described above and the purpose of the same is to provide a sliding bearing made of synthetic resin that has the ability to reliably prevent the ingress of dust and the like into sliding surfaces without causing a decline in the sliding characteristics due to the ingress of dust and the like and which makes it possible to reduce time in the assembly operation and which does not come off easily due to vibrations and the like, thus enabling an improvement in manufacturing cost, durability and sealing capacity and maintain smooth steering during steering operation for extended periods of time. MEANS TO SOLVE PROBLEMS
A synthetic resin slide bearing in accordance with the present invention comprises: an upper shell made from synthetic resin which integrally includes an annular top shell base portion having an annular lower surface in an axial direction, a Inner peripheral side cylindrical suspended portion suspended from a radially inner peripheral end portion of the annular bottom surface of the upper casing base portion and an outer peripheral side cylindrical suspended portion suspended from a radially outer peripheral end portion of the annular bottom surface of the top coat base portion; a bottom liner made of synthetic resin which integrally includes an annular bottom liner base portion having an annular top surface in the axial direction and superimposed on the top liner so as to be rotatable about a geometric axis in relating to the top liner and an annular protuberance protruding from the annular upper surface of the lower liner base portion towards the annular lower surface of the upper liner base portion; a synthetic resin plain bearing piece disposed in an annular space between the annular lower surface of the upper casing base portion and the annular upper surface of the annular protrusion of the lower casing base portion and in an annular space between the surface outer peripheral of the cylindrical suspended portion of inner peripheral side and the inner cylindrical peripheral surface of the annular protrusion so that it is brought to an upper axial annular surface and a radial inner cylindrical peripheral surface thereof in sliding contact with the lower annular surface of the portion of upper shell base and with a radial outer peripheral surface of the inner peripheral side cylindrical suspended portion, while being brought to an axial annular lower surface and a radial outer cylindrical peripheral surface thereof in contact with an axial annular upper surface and the inner peripheral surface c radial illindrical of the annular protuberance; and a sealing member made of synthetic resin having a radially inner peripheral side thereof, the flexible inner peripheral side annular sealing portion which is brought into contact with the radially inner peripheral surface of the inner peripheral side cylindrical suspended portion of the coating. so as to seal a gap between the inner peripheral side cylindrical suspended portion of the top shell and the annular protrusion of the bottom shell base portion, which has a radially outer peripheral side thereof the flexible outer peripheral side annular sealing portion which is brought into contact with the radially inner peripheral surface of the outer peripheral side cylindrical suspended portion of the top casing so as to seal a gap between the outer peripheral cylindrical suspended portion of the top casing and the annular protrusion of the base portion of bottom casing and having connecting portions for mutually connecting the inner peripheral side annular sealing portion and the outer peripheral side annular sealing portion, wherein the inner peripheral side annular sealing portion and the outer peripheral side annular sealing portion are integrally molded with the connecting portions having respective columnar portions situated in a plurality of hole portions in the annular upper surface of the annular protrusion of the lower shell base portion.
According to the sliding bearing made of synthetic resin in accordance with the present invention, provided that the inner peripheral side annular sealing portion and the outer peripheral side annular sealing portion are formed integrally with the connecting portions which have respective columnar portions located in a plurality of hole portions formed in the annular upper surface of the annular protrusion of the bottom liner base portion, the number of parts can be reduced, a reduction in manufacturing cost can be realized and durability can be improved by eliminating the possibility of exit. Furthermore, the sealing ability can be further improved since the sealing member has on its radially inner and outer peripheral sides an inner peripheral side annular sealing portion to seal the gap between the inner peripheral side cylindrical suspended portion of the casing upper and the cylindrical surface portion of the annular protrusion of the base portion of the lower shell and an outer peripheral side annular sealing portion for sealing the gap between the suspended outer peripheral side cylindrical portion of the upper shell and a peripheral cylindrical surface portion outer ring protrusion of the bottom liner base portion.
In a preferred embodiment of the synthetic resin slide bearing in accordance with the present invention, the inner peripheral side annular sealing portion includes an inner annular peripheral sealing base portion which is joined to a cylindrical inner surface of the annular protrusion of the bottom liner base portion such as to cover a plurality of protrusions which are integrally formed on the cylindrical inner surface of the annular protrusion elongate in a circumferential direction and a flexible inner peripheral sealing portion which is connected to a portion of radially inner peripheral end of the inner peripheral sealing base portion and which is elastically brought into flexural contact with an outer peripheral surface of the inner peripheral side cylindrical suspended portion of the top liner, wherein the inner peripheral sealing portion has a smaller thickness than the thickness of the base portion of the seal. and extends diagonally downwardly from an outer peripheral end portion connected to the inner peripheral end portion of the inner peripheral sealing base portion.
In addition, the outer peripheral side annular sealing portion may include an outer annular peripheral sealing base portion which is adjoined to an outer peripheral surface continuous with an annular planar portion of an outer peripheral edge of the annular protrusion of the base portion. lower coating such as to cover the outer peripheral surface and a plurality of projections integrally formed on the outer peripheral surface along the circumferential direction and a flexible outer peripheral sealing portion which is connected to the outer peripheral sealing base portion and is elastically brought into flexural contact with an inner peripheral surface of a transversely trapezoidal cylindrical portion of the outer peripheral side cylindrical suspended portion. This outer peripheral seal portion may have a thickness less than the thickness of the outer peripheral seal base portion and may extend diagonally downward from an inner peripheral end portion connected to the outer peripheral end portion of the base portion external peripheral seal.
In a preferred embodiment, the plurality of orifice portions are respectively located in discrete portions each located between adjacent portions of a plurality of vertically projecting curved portions provided in an outer peripheral edge portion of the annular upper surface of the annular protrusion of the portion. casing base along the circumferential direction, wherein the annular protrusion of the bottom casing base portion has a recessed groove on an outer peripheral side which is open at a radially outer end thereof to a radially outer side and is open at a further radially inner end thereof to the orifice portion and a recessed groove on an inner peripheral side which is open at a radially outer end thereof to the orifice portion and is open at another radially inner end thereof to a radially inner side and in which each of the connecting portions m an outer connecting portion of which the radially inner side is integrally formed with the columnar portion of which the radially outer side is integrally formed with the outer peripheral side annular sealing portion and which is disposed in the recessed groove on the outer peripheral side and an inner connecting portion of which the radially outer side is formed integrally with the columnar portion of which the radially inner side is formed integrally with the inner peripheral side annular sealing portion and which is disposed in the recessed groove on the inner peripheral side.
The top liner may have an annular seat portion integrally formed on a radial central portion of the annular top surface in the axial direction of the top liner base portion.
In a preferred embodiment, the inner peripheral side cylindrical suspended portion has a thick-walled cylindrical portion connected by its axial upper end portion to a radially inner peripheral end of the annular lower surface of the upper casing base portion and a cylindrical portion of thin wall that connected by its axial upper end portion to an axial lower end of the thick-walled cylindrical portion and is thinner walled in relation to the thick-walled cylindrical portion; the inner peripheral side annular sealing portion is in contact with a radial cylindrical outer peripheral surface of the thin-walled cylindrical portion; and the outer peripheral side cylindrical suspended portion includes a transversely trapezoidal cylindrical portion which is connected by its axial upper end portion to a radially outer peripheral end portion of the annular lower surface of the upper casing base portion and has an inner peripheral surface which is gradually increased in diameter, as seen in a long direction of the lower annular surface of the upper casing base portion in the axial direction, as well as a cylindrical portion which is connected to an axial lower end of the transversely trapezoidal cylindrical portion, the outer peripheral side annular seal that is in contact with the transversely trapezoidal cylindrical portion.
The sliding bearing piece may include an annular thrust sliding bearing piece portion having an annular upper surface which is brought into sliding contact with the annular lower surface of the upper casing base portion and an annular lower surface which is brought about to a contact with the annular upper surface of the annular protrusion of the lower liner base portion; the cylindrical radial slide bearing part portion which is integrally formed at an end portion thereof at an end portion of the thrust slide bearing part portion such as to extend axially downwardly from an end portion of the thrust sliding bearing piece portion and has an annular inner side surface which is brought into slidable contact with the outer peripheral surface of the inner peripheral side cylindrical suspended portion of the upper casing base portion and a annular outer side surface which is brought into contact with the inner peripheral surface of the annular protrusion of the undercoat base portion; and a plurality of plate piece portions which project radially outwardly from an outer peripheral surface of the thrust sliding bearing piece portion and are respectively located in the discontinuous portions mutually located between adjacent portions of the curved projecting portion provided vertically in the portion. of the outer peripheral edge of the annular upper surface of the annular protrusion of the lower casing base portion along the outer peripheral edge portion in the circumferential direction so that the sliding bearing part does not rotate in the circumferential direction with respect to the lower casing.
The thrust sliding bearing part portion may have an annular groove provided on an inner peripheral side of an annular top surface thereof and a plurality of annular grooves which are open at one end thereof to the annular groove and are open at other ends therefrom to the outer peripheral surface and which are provided on the upper surface by separating them at equivalent intervals in the circumferential direction and the radial slide bearing part portion has a plurality of axial grooves 2 which are open at both of its ends and are provided on the annular inner side surface by spacing them at equivalent intervals in the circumferential direction. Alternatively, the thrust sliding bearing piece portion may have pluralities of inner recessed portions and outer recessed portions which are formed in an annular upper surface thereof along the circumferential direction and in at least two rows including an inner row and an outer row in the radial direction and the radial sliding bearing part portion has a plurality of axial grooves which are both open at both of their ends and are provided on the annular inner side surface by spacing them at equivalent intervals in the direction. circumferential.
In a preferred embodiment, the inner periphery side annular sealing portion and the outer peripheral side annular sealing portion are molded by inserting into the annular protrusion of the bottom liner base portion together with the connecting portions.
The sliding bearing made of synthetic resin in accordance with the present invention is preferably used as a thrust sliding bearing of a shock absorber type suspension in a four-wheel motor vehicle.
The synthetic resin to form the topcoat can be a thermoplastic synthetic resin such as a polyacetal resin, polyamide resin or polybutylene terephthalate resin. Furthermore, the synthetic resin to form the undercoat can be a thermoplastic synthetic resin such as a polyacetal resin, a polyamide resin or a polybutylene terephthalate resin which contains reinforcing fibers including glass fibers, carbon fibers and similar. The synthetic resin to form the sliding bearing part can be a thermoplastic synthetic resin such as a polyacetal resin, a polyamide resin, polybutylene terephthalate resin or a polyolefin resin such as a polyester resin. As the synthetic resin to form the sealing member, polyurethane resin, a polyester elastomer, or the like can be mentioned in the preferred examples. ADVANTAGES OF THE INVENTION
In accordance with the present invention, it is possible to provide a sliding bearing made of synthetic resin which has the ability to reliably prevent the ingress of dust and the like on the sliding surfaces without causing a decline in the sliding characteristics due to the ingress of dust and the like and which enables the reduction of time in the assembly operation and are easily exits due to vibrations and the like, thus making it possible to improve manufacturing cost, durability and sealing ability and maintain smooth steering during over steering operation. extended periods of time. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an explanatory cross-sectional view taken in the direction of the arrows along line I-I shown in Figure 3 of a preferred embodiment of the present invention; Figure 2 is an explanatory front elevation view of the embodiment shown in Figure 1; Figure 3 is an explanatory plan view of the embodiment shown in Figure 1; Figure 4 is an enlarged partially explanatory cross-sectional view of the embodiment shown in Figure 1;
Figure 5 is an enlarged partially explanatory cross-sectional view of the embodiment shown in Figure 1; Figure 6 is an explanatory plan view of a topcoat of the embodiment shown in Figure 1; Figure 7 is an explanatory cross-sectional view, taken in the direction of the arrows along line VII-VII, of the top cladding shown in Figure 6 in the embodiment shown in Figure 1; Figure 8 is an enlarged partially explanatory cross-sectional view of the top shell shown in Figure 7 in the embodiment shown in Figure 1; Figure 9 is an explanatory plan view of a bottom liner of the embodiment shown in Figure 1;
Figure 10 is an explanatory cross-sectional view, taken in the direction of the arrows along line X-X, of the undercoat shown in Figure 9; Figure 11 is an enlarged, partially explanatory cross-sectional view of the underlay shown in Figure 10;
Figure 12 is an enlarged cross-sectional explanatory view, taken in the direction of the arrows along line XII-XII, of the undercoat shown in Figure 9; Figure 13 is an enlarged, partially explanatory plan view of the underlay shown in Figure 9; Figure 14 is an enlarged partially explanatory plan view of the underlay shown in Figure 9;
Figure 15 is an explanatory cross-sectional view, taken in the direction of arrows XV - XV, of the undercoat shown in Figure 13; Figure 16 is an explanatory cross-sectional view taken in the direction of arrows XVI - XVI of the undercoat shown in Figure 9; Figure 17 is an explanatory cross-sectional view taken in the direction of arrows XVII - XVII of a sliding bearing piece shown in Figure 18; Figure 18 is an explanatory plan view of the sliding bearing piece of the embodiment shown in Figure 1;
Figure 19 is an explanatory bottom view of the sliding bearing piece of the embodiment shown in Figure 1; Figure 20 is an explanatory cross-sectional view taken in the direction of the arrows along line XX-XX of the sliding bearing piece shown in Figure 18; Figure 21 is an enlarged explanatory view, taken in the direction of the arrows along line XXI-XXI, of the sliding bearing piece shown in Figure 18; Figure 22 is an explanatory plan view of a sealing member of the embodiment shown in Figure 1;
Figure 23 is an explanatory cross-sectional view, taken in the direction of the arrows along line XXIII-XXIII, of the sealing member shown in Figure 22; Figure 24 is an explanatory perspective view of the undercoat having the sealing member of the embodiment shown in Figure 1;
Figure 25 is an explanatory plan view of the undercoat having the sealing member of the embodiment shown in Figure 1;
Figure 26 is an explanatory cross-sectional view, taken in the direction of the arrows along line XXVI-XXVI, of the bottom shell having the sealing member shown in Figure 25;
Figure 27 is an explanatory cross-sectional view, taken in the direction of the arrows along line XXVII - XXVII, of the bottom shell having the sealing member shown in Figure 25;
Figure 28 is an enlarged partially explanatory cross-sectional view of the bottom liner having the sealing member shown in Figure 26;
Figure 29 is a partially explanatory enlarged plan view of the undercoat having the sealing member shown in Figure 25;
Figure 30 is an explanatory cross-sectional view, taken in the direction of the arrows along line XXX-XXX, of the bottom liner having the sealing member shown in Figure 25;
Figure 30 is an explanatory cross-sectional view, taken in the direction of the arrows along the line XXXI-XXXI shown in Figure 32, of another example of the sliding bearing part in the embodiment shown in Figure 1;
Figure 32 is an explanatory plan view of the sliding bearing piece shown in Figure 30; Figure 33 is an explanatory bottom view of the sliding bearing piece shown in Figure 30; Figure 34 is an enlarged partially explanatory cross-sectional view of the slide bearing piece shown in Figure 30;
Figure 35 is an enlarged partially explanatory cross-sectional view of the slide bearing piece shown in Figure 31;
Figure 36 is an explanatory cross-sectional view, taken in the direction of the arrows along line XXXVI-XXXVI, of the slide bearing piece shown in Figure 32; and
Figure 37 is an explanatory cross-sectional view in which the slide bearing shown in Figure 1 is incorporated into a damper-type suspension. WAY TO CARRY OUT THE INVENTION
Hereinafter, a more detailed description of the present invention will be given with reference to the preferred embodiment illustrated in the drawings. It should be noted that the present invention is not limited to the embodiments.
In Figures 1 to 5, a sliding bearing 1, in accordance with this embodiment, for use in a shock absorber type suspension of a four-wheel motor vehicle is comprised of an upper coating made of synthetic resin 2 which is fixed to one side of vehicle body by means of a mounting member; a lower coating made of synthetic resin 3 which is superimposed on the upper coating 2 so as to be able to rotate around a geometric axis O in a circumferential direction R with respect to the upper coating 2 and wherein a spring bearing surface is suspension coil spring is formed; a sleeve bearing piece made of synthetic resin 5 disposed in an annular space 4 between the upper lining 2 and the lower lining 3; and a sealing member made of synthetic resin 8 for sealing the respective other annular end portions, which communicates with the outside, of a gap 6 on an inner peripheral side and a gap 7 on an outer peripheral side in a radial direction X between the upper cladding 2 and the lower cladding 3, the span 6 and the span 7 respectively communicating with the annular space 4 at their annular end portions.
As shown particularly in detail in Figures 6 to 8, the top shell 2 integrally includes an annular top shell base portion 10 having an annular bottom surface 9 in an axial direction Y, a cylindrical suspended portion of peripheral side. inner 12 suspended from an inner peripheral end portion 11 in the X radial direction of the annular lower surface 9 of the upper casing base portion 10, an outer peripheral side cylindrical suspended portion 14 suspended from an outer peripheral end portion 13 in the X radial direction of the annular bottom surface 9 of the upper casing base portion 10, and an annular seat portion 16 protruding from a central portion in the X radial direction of an annular top surface 15 of the casing base portion top 10.
The inner peripheral side cylindrical suspended portion 12 has a thick-walled cylindrical portion 18 connected by its upper end portion 17 to the inner peripheral end portion 11 of the annular lower surface 9 of the upper casing base portion 10, as well as a portion thin-walled cylindrical portion 23 which is connected by its upper end portion 22 to a lower end portion 21 of thick-walled cylindrical portion 18 by means of an inner peripheral side stepped surface 19 and an outer peripheral side stepped surface 20 and it has a thinner wall in relation to the thick-walled cylindrical portion 18.
The thick-walled cylindrical portion 18 and the thin-walled cylindrical portion 23 respectively have a cylindrical inner peripheral surface 25 and 26 that define a direct hole 24 through which a stem member of a damper-type suspension is inserted. The thick-walled cylindrical portion 18 has a cylindrical outer peripheral surface 27, and the thin-walled cylindrical portion 23 has a truncated conical outer peripheral surface 29 which is smaller in diameter than the outer peripheral surface 27 and is tapered from the surface. staggered on outer peripheral side 20 towards an annular end face 28.
The outer peripheral side cylindrical suspended portion 14 having a cylindrical outer peripheral surface 30 includes a transversely trapezoidal cylindrical portion 33 which is connected by its upper end portion 31 to the outer peripheral end portion 13 of the annular lower surface 9 of the base portion of top lining 10 and has an inner peripheral surface 32 that is gradually increased in diameter, as viewed in a direction away from the annular bottom surface 9 of the top lining base portion 10, as well as a cylindrical portion 36 that is connected by its portion. of upper end 34 to a lower end portion 35 of the transversely trapezoidal cylindrical portion 33. An annular end face 37 of the cylindrical portion 36 is located inferior to the annular end face 28 of the thin wall cylindrical portion 23 of the suspended cylindrical portion on the side inner peripheral 12 in the axial Y direction.
As shown particularly in detail in Figures 9 to 16, the bottom liner 3 integrally includes an annular bottom liner base portion 39 having an annular top surface 38; an annular protuberance 40 protruding from the annular upper surface 38 of the lower shell base portion 39 from the outside upwards in the axial direction Y; a hollow cylindrical portion 43 disposed on an inner peripheral portion 42 of an annular lower surface 41 of the lower shell base portion 39 such as to protrude from the annular lower surface 41 downwardly in the axial direction Y; an annular protruding portion 46 which protrudes inwardly in the radial direction X from a cylindrical inner peripheral surface 45 of the hollow cylindrical portion 43 to an end portion 44 of the hollow cylindrical portion 43; an annular protruding portion 47 protruding from the end portion 44 of the hollow cylindrical portion 43 downwards in the axial direction Y; and a plurality of curved portions 50 projecting from an outer peripheral edge portion of an annular upper surface 48 of the annular protuberance 40 upwards in the axial direction Y leaving an annular planar portion 49 and are provided vertically in such a manner. to be mutually separated in the circumferential direction R around the geometric axis O.
The annular protuberance 40 includes a cylindrical outer peripheral surface 51 connected to the annular flat portion 49 of its annular top surface 48, an annular stepped surface 52 connected to the outer peripheral surface 51, an outer peripheral cylindrical surface 53 connected to the stepped surface 52 and thereafter extends downwardly in the axial direction Y beyond the annular upper surface 38 and an annular projecting surface 55 located outwardly in the radial direction X of a lower end portion 54 of the outer peripheral cylindrical surface 53. The annular projecting surface 55 on one side is connected to the lower end portion 54 of the outer peripheral cylindrical surface 53 through an annular top surface 56 and a circular arc-shaped recessed surface 57 and the annular projecting surface 55 on the other side is connected to the annular bottom surface 41 through a surface annular tapered 55a.
A plurality of protrusions 58, which are rectangular in plan view, are integrally formed on the outer peripheral surface 51 of the annular protrusion 40 along the circumferential direction R and the protrusions 58 extend from the annular stepped surface 52 upwards in the axial direction Y. An upper end surface 59 of each protrusion 58 is connected to the annular flat portion 49 of the annular upper surface 48 through the outer peripheral surface 51 and an outer surface 60 of each protrusion 58 is formed so as to be , in diameter, smaller than the outer diameter of the outer peripheral cylindrical surface 53.
The annular protuberance 40 has an inner peripheral surface 62 connected to its annular upper surface 48, the reduced diameter cylindrical portion 64 which is reduced in diameter by an annular stepped surface 63 and has an inner peripheral surface 64a. The annular top surface 38 is connected to the cylindrical inner peripheral surface 45 of the cylindrical portion 43 through an annular notched stepped surface 65.
A plurality of protrusions 66, which are rectangular in plan view, are integrally formed on the inner peripheral surface 64a of the reduced diameter cylindrical portion 64 of the annular protrusion 40 along the circumferential direction R, and the protrusions 66 extend from the annular upper surface 38 upwards in the axial direction Y. An upper end surface 67 of each protrusion 66 is connected to the inner peripheral surface 62 through the inner peripheral surface 64a of the reduced diameter cylindrical portion 64 and the annular stepped surface 63 .
A plurality of orifice portions 68 are formed in the annular upper surface 48 of the annular protuberance 40 along the circumferential direction R such that it extends downwardly in the axial direction Y. Each orifice portion 68 has a truncated conical shape that is tapered. from its circular opening portion 69 to a lower surface 70 defining that orifice portion 68 and an inner surface 71 defining that orifice portion 68 has a truncated conical surface. These orifice portions 68 are provided so as to reduce, as practically as possible, such a problem as the occurrence of pressure marks during molding by smoothing the annular protrusion 40 of the undercoat 3 and the thickness of other portions thereof.
In the annular protuberance 40, the following portions are formed on an edge of a circular opening portion 69a of each orifice portion 68a, among the plurality of orifice portions 68 that is formed in that portion of the annular upper surface 48 that is located in a discontinuous portion 72 between adjacent portions of the curved projecting portion 50 provided vertically on the outer peripheral edge portion of the annular upper surface 48 along the circumferential direction R: a pair of semicircular recessed portions 73 mutually opposed in the circumferential direction R such as surround the circular opening portion 69a and they are shallow in depth; a pair of inner radially recessed portions 74 which are continuous from the respective semicircular recessed portions 73 on an inner side in the radial direction X are open in the inner peripheral surface 62, have the same depth as the semicircular recessed portions 73 and are mutually opposed in the circumferential direction R; a pair of radially recessed outer portions 77 which are continuous from the respective semicircular recessed portions 73 on an outer side in the radial direction X are closed on the outer side in the radial direction X by closing the portion 76 of the annular protrusion 40, have the same depth that the semicircular recessed portions 73 and mutually oppose in the circumferential direction R, and an outer peripheral side recessed groove 79 which is located at an in the axial direction Y m and an underside to the lower surfaces 78 of the semicircular recessed portions 73, the portions radially recessed inners 74 and radially recessed outer portions 77 penetrate an intermediate portion of the protrusion 58, is open on an outer surface 60 of the protrusion 58 on an outer side in the radial direction X and communicates with the orifice portion 68a on an inner side in the radial direction X. The recessed groove 79 is defined by a bottom surface 80 located moved in the axial direction Y on an underside to the bottom surface 78 and through a pair of wall surfaces 81 which are mutually opposed in the circumferential direction R; each of the wall surfaces 81 has an inner peripheral side end edge 82 and an outer peripheral side end edge 83 in which the inner peripheral side end edge 82 is connected to the inner surface 71 defining the orifice portion 68a and the outer peripheral side end edge 83 is connected to the outer surface 60.
In the annular protuberance 40, the following portions are further formed on an edge of the circular opening portion 69a of the orifice portion 68a: a notched recessed groove 83a which is located in the axial direction Y on an underside of the lower surfaces 78 of the radially inner portions undercuts 74 and is notched such that it extends from the side of the hole portion 68a inwardly in the radial direction X; an open slot 83b which is defined through a lower surface 88 connected through a stepped surface 87 to a lower surface 86 defining the notched recessed slot 83a and is open to an inner surface 89 of the protrusion 66; and a pair of notched grooves 84 which communicate with the open groove 83b through their side surfaces in the circumferential direction R, are open in the inner peripheral surface 62 on an inner side in the radial direction X, are mutually defined by an inclined surface 94 on an outer side in the radial direction X and through the stepped surface 63 on a lower side in the axial direction Y, and mutually opposite in the circumferential direction R, the notched recessed groove 83a which communicates with the hole portion 68a on the outer side in the direction radial X.
Each of the pairs of wall surfaces 92 of the annular protrusion 40 defining the notched recessed groove 83a and the open groove 83b and mutually opposite in the circumferential direction R, have an inner peripheral side end edge 93 and an inner side end edge. the outer peripheral side 95, the inner peripheral side end edge 93 in connection with an inclined surface 94 defining the slotted groove 84, the outer peripheral side end edge 95 in connection with the inner surface 71 defining the orifice portion 68a and the inclined surface 94 which is inclined such as to increase the width of the slotted groove 84 in the radial direction X, as seen in an upward direction in the axial direction Y.
Therefore, the annular protuberance 40 has undercut groove 79 which is open at its outer end in the radial direction X to the outer side in the radial direction X on the outer surface 60, is open at its other inner end in the radial direction X to the hole portion 68a and is open upwards in the axial direction V from the outer end in the radial direction X to the other inner end in the radial direction X, as well as a recessed groove in the inner peripheral side 83c which is constructed through the notched recessed groove 83a and the open groove 83b which communicate with each other and is open at the outer end in the radial direction X to the hole portion 68a, is open at the other inner end in the radial direction X to the inner side in the radial direction X at the inner surface 89, and is open upwards in the direction axial Y in a range from the outer side in the X radial direction to the other inner end in the X radial direction.
As shown particularly in detail in Figures 17 to 21, the synthetic resin slide bearing piece 5 disposed in the annular space 4 includes an annular thrust sliding bearing piece portion 99 having an annular upper surface 97 which is brought to a slidable contact with the annular lower surface 9 of the upper shell base portion 10 and an annular lower surface 98 which is brought into contact with the annular upper surface 48 of the annular protrusion 40 of the lower shell base portion 39; a cylindrical radial slide bearing piece portion 102 which is integrally formed in its an annular end portion at an annular end portion of the thrust slide bearing piece portion 99 such as to extend downwardly in the axial direction Y and has an annular inner side surface 100 which is brought into slidable contact with the outer peripheral surface 27 of the thick wall cylindrical portion 18 of the inner peripheral side cylindrical suspended portion 12 of the top shell base portion 10 and an annular outer side surface 101 which is brought into contact with the inner peripheral surface 62 of the annular protrusion 40 of the lower cladding base portion 39; and a plurality of plate piece portions 104 which project radially from an outer peripheral surface 103 of the thrust slide bearing piece portion 99 and which are respectively located in discrete portions 72, mutually located between adjacent portions of the projecting portion. curved 50 provided vertically in the outer peripheral edge portion of the annular upper surface 48 of the annular protuberance 40 of the lower casing base portion 39 along the circumferential direction R and are stapled through the adjacent portions of the projecting portions 50 so that the sliding bearing 5 does not rotate in the circumferential direction R with respect to bottom casing 3.
The thrust slide bearing piece portion 99 has an annular groove 105 provided on an inner peripheral side of the annular top surface 97 and a plurality of annular grooves 106 which are open at their ends to the annular groove 105 and are open at their other ends. to the outer peripheral surface 103 and which are provided on the upper surface 97 by separating them at equivalent intervals in the circumferential direction R. The radial slide bearing piece portion 102 has a plurality of axial grooves 107 which are open in both of its ends and are provided on the annular inner side surface 100 by separating them at equivalent intervals in the circumferential direction R. The annular groove 105, radial grooves 106 and axial grooves 107 serve as a drain section for lubricating oil such as grease.
As shown particularly in detail in Figures 4 and 5 and in Figures 22 to 30, the sealing member 8 has a flexible inner peripheral side annular sealing portion 110 which is elastically brought into flexural contact with the truncated conical outer peripheral surface 29 of the thin wall cylindrical portion 23 of the inner peripheral side cylindrical suspended portion 12 so as to seal the gap 6 between the thin wall cylindrical portion 23, i.e. an axial end portion 108 of the inner peripheral side cylindrical suspended portion 12 of the upper casing base portion 10 and an inner peripheral end portion 109 of the lower casing base portion 39; a flexible outer peripheral side annular sealing portion 113 which is elastically brought into flexural contact with the inner peripheral surface 32 of the transversely trapezoidal cylindrical portion 33 of the outer peripheral side cylindrical suspended portion 14, so as to seal the gap 7 between a axial end portion 111 of the outer peripheral side cylindrical suspended portion 14 of the upper casing base portion 10 and an outer peripheral end portion 112 of the lower casing base portion 39; and a plurality of connecting portions 115 for mutually connecting the inner peripheral side annular sealing portion 110 located at the inner peripheral side and the outer peripheral side annular sealing portion 113 located at the outer peripheral side.
The inner peripheral side annular sealing portion 110 includes an inner annular peripheral sealing base portion 116 which is integrally joined to the reduced diameter cylindrical portion 64 of the annular protrusion 40 which projects from the upper annular surface 38 of the lower shell base portion 39 upwards in the axial direction X such as to cover the outer surfaces of the plurality of protrusions 66 which are rectangular in plan view and are integrally formed in the reduced diameter cylindrical portion 64 , as well as an annular flexible inner peripheral sealing portion 117 which is connected to the inner peripheral sealing base portion 116 and is elastically brought into contact with the truncated conical outer peripheral surface 29 of the thin wall cylindrical portion 23 of the cylindrical suspended portion of inner peripheral side 12.
The inner peripheral sealing portion 117 extends diagonally downwardly, i.e. inwardly in the radial direction X, from an inner peripheral end portion 118 of the inner peripheral sealing base portion 116, and has a thickness less than the thickness of the inner peripheral sealing base portion 116.
The outer peripheral side annular sealing portion 113 includes an outer annular peripheral sealing base portion 119 which is integrally adjoined to the outer peripheral surface 51 of the annular protrusion 40 which projects from the upper annular surface 38 of the portion. of bottom liner base 39 upwards in the axial direction X such as to cover the outer peripheral surface 51, the upper end face 59 of the hump 58, the outer surface 60 of the hump 58 and the inner peripheral side of the stepped surface 52, as well as an annular outer peripheral sealing portion 120 which is connected to the outer peripheral sealing base portion 119 and is elastically brought into flexural contact with the inner peripheral surface 32 of the transversely trapezoidal cylindrical portion 33 of the outer peripheral side cylindrical suspended portion 14.
The outer peripheral sealing portion 120 extends diagonally downwards, i.e., downwards in the radial direction X, from an inner peripheral end portion 121 of the outer peripheral sealing base portion 119, and has a thickness less than the thickness of the outer peripheral sealing base portion 119.
The outer peripheral sealing portion 120 can be adapted to cover the flat annular portion 49 as well.
Each of the connecting portions 115 includes a columnar portion 115a filled in the orifice portion 68a formed in the annular top surface 48 located in the discontinuous portion 72; an outer connecting portion 115b of which the inner side in the radial direction X is formed integrally with the columnar portion 115a of which the outer side in the radial direction X is formed integrally with the outer peripheral sealing base portion 119 and which is disposed on the recessed slot 79; and an inner connecting portion 115c of which the outer side in the radial direction X is formed integrally with the columnar portion 115a of which the inner side in the radial direction X is formed integrally with the inner peripheral sealing base portion 116 and which is disposed in the recessed groove 83c consisting of the notched recessed groove 83a and the open groove 83b. The columnar portion 115a is joined to the lower surface 70 and the inner surface 71 so as to cover the lower surface 70 and the inner surface 71, the outer connecting portion 115b is joined to the wall surfaces 81 and the lower surface 80 in such a way. so as to cover the mutually opposite pair of wall surfaces 81 and lower surface 80 defining recessed groove 79 in annular protrusion 40 and inner connecting portion 115c is adjoined to lower surface 86, lower surface 88 and wall surface 92 such as to cover the lower surface 86, the lower surface 88 and the wall surface 92.
The inner periphery side annular sealing portion 110 and the outer peripheral side annular sealing portion 113 are molded by inserting into the annular protrusion 40 of the undercoat base portion 39 near the connecting portions 115 having the columnar portions 115a of so that each of the plurality of connecting portions 115 is integrally connected to the inner connecting portion 115c, i.e. an end portion to the inner peripheral side annular sealing portion 110 and to the outer connecting portion 115b, that is, the other end portion to the outer peripheral side annular sealing portion 113 by insert molding.
The above-described sliding bearing 1 is adapted to allow relative rotation in the circumferential direction R of the lower casing 3 relative to the upper casing 2 through relative sliding in the circumferential direction R of each of the upper surfaces 97 of the sliding bearing part portion of thrust 99 with respect to the annular lower surface 9 of the upper casing base portion 10 and the inner side surface 100 of the radial slide bearing part portion 102 with respect to the outer peripheral surface 27 of the thick-walled cylindrical portion 18.
According to the above-described sliding bearing 1, provided that each of the plurality of connecting portions 115 are integrally connected at their one end portion to the inner peripheral side annular sealing portion 110 and at its other end portion. end to the outer peripheral side annular sealing portion 113, respectively, by insert molding, the number of gears can be reduced and the assembly efficiency is exceeded, enabling to realize the reduction of the manufacturing cost. Furthermore, durability can be improved by eliminating the possibility of exit.
Furthermore, according to the sliding bearing 1, the sealing ability can be improved since the sealing member 8 has the inner peripheral side annular sealing portion 110 to seal the gap 6 between the inner peripheral side cylindrical suspended portion. 12 of the top shell 2 and the inner peripheral end portion 109 of the bottom shell 3 and the outer peripheral side annular sealing portion 113 for sealing the gap 7 between the outer peripheral side cylindrical suspended portion 14 of the top shell 2 and the portion of outer peripheral end 112 of the lower casing 3.
Incidentally, as shown in Figures 31 to 36, in the synthetic resin plain bearing piece 5 inclusive: the portion of the annular thrust sliding bearing piece 99 having the annular upper surface 97 which is brought into sliding contact with the annular lower surface 9 of the upper casing base portion 10 and the annular lower surface 98 which is brought into contact with the annular upper surface 48 of the annular protrusion 40 of the lower casing base portion 39; the cylindrical radial slide bearing piece portion 102 which is integrally formed at its an end portion at an end portion of the thrust slide bearing piece portion 99 such as to extend downwardly in the axial direction. Y and has the annular inner side surface 100 which is brought into slidable contact with the outer peripheral surface 27 of the thick-walled cylindrical portion 18 of the top shell 2 and the annular outer side surface 101 which is brought into contact with the inner peripheral surface 62 of the annular protuberance 40 of the bottom liner base portion 39; and the plurality of plate piece portions 104 which project radially outwardly from the outer peripheral surface 103 of the thrust slide bearing piece portion 99 and which are respectively located in the discrete portions 72, each located between adjacent portions of the portion. curved protrusion 50 provided vertically on the outer peripheral edge portion of the annular upper surface 48 of the annular protuberance 40 of the bottom liner base portion 39 along the circumferential direction R and are stapled by adjacent portions of the projecting portions 50 so that the slide bearing 5 does not rotate in the circumferential direction R with respect to the lower casing 3, the thrust slide bearing piece portion 99 may have pluralities of inner recessed portions 122 and outer recessed portions 123 which are formed in the annular upper surface 97 along the circumferential direction R and in at least two rows that include a row inner and an outer row in the radial direction.
Each of the inner recessed portions 122 formed as the inner row is defined by an inner circular arc-shaped surface 124 which has geometric axis O as the center, an outer circular arc-shaped surface 125 with the diameter thereof increased. in the radial direction and a pair of circular arc-shaped surfaces 126 connecting the respective opposite ends of the inner circular arc-shaped surface 124 and the outer circular arc-shaped surface 125.
Each of the outer recessed portions 123 formed with the outer row is defined by an inner circular arc-shaped surface 127 which has the geometric axis O as the center, an outer circular arc-shaped surface 128 with the diameter of the same enlarged. in the radial direction and a pair of circular arc shaped surfaces 129 which connect the inner circular arc shaped surface 127 and the outer circular arc shaped surface 128. Each outer recessed portion 123 is situated in a position corresponding to a portion discontinuous 130 in the circumferential direction R between adjacent portions of the inner recessed portions 122 formed as the inner row.
Small circular portions 130a which are situated at 60° intervals along the circumferential direction R indicate projecting pin positions used at the time of molding of the slide bearing 1 and are not situated in the inner recessed portions 122.
The radial slide bearing piece portion 102 shown in Figures 31 to 36 may also have the plurality of axial grooves 107 which are open at both of their ends in the axial direction Y and are provided on the annular inner side surface 100 by separating the same at equivalent intervals in the circumferential direction R.
A plurality of inner recessed portions 122 and outer recessed portions 123 which are located on the annular upper surface 97 of the thrust slide bearing piece portion 99 along the circumferential direction R and in at least two rows including the inner row and the outer row in radial direction as well as axial grooves 107 serve as a drain section for lubricating oil such as grease.
According to the slide bearing 1 having the slide bearing piece 5 shown in Figures 31 to 36, the sealing ability can be improved since the sealing member 8 has the inner peripheral side annular sealing portion 110 to seal the gap 6 between the inner peripheral side cylindrical suspended portion 12 of the upper shell 2 and the inner peripheral end portion 109 of the lower shell 3 and the outer peripheral side annular sealing portion 113 to seal the gap 7 between the cylindrical suspended portion of outer peripheral side 14 of upper casing 2 and outer peripheral end portion 112 of bottom casing 3. In addition, an increase in steering force can be prevented by providing lubricating oil, such as grease, filled in the inner recessed portions 122 and in the outer recessed portions 123 is constantly present in the sliding direction between the annular lower surface 9 of the cladding base portion ment 10 and on the upper surface 97 of the thrust slide bearing portion 99.
As shown in Figure 37, for example, the synthetic resin plain bearing 1 in accordance with this modality can be applied to a shock absorber type suspension in a four-wheel motor vehicle by disposing the synthetic resin plain bearing 1, in accordance with that embodiment between a vehicle body side bearing surface 132 of a vehicle body side mounting member 131 and the suspension coil spring 133 so that the annular seat portion 16 of the surface annular upper 15 of the upper casing 2 of the sliding bearing 1 is contiguous with the vehicle body side bearing surface 132 of the vehicle body side mounting member 131 and so that the annular lower surface 41 of the lower casing 3 as a spring bearing surface 134 of the slide bearing 1 abuts the upper end portion of the suspension coil spring 133.
In the damper-type suspension shown in Figure 37, the relative rotation in the circumferential direction R of the suspension coil spring 133 relative to the vehicle body side mounting member 131 is allowed through the relative slip in the circumferential direction R of each. of the upper surfaces 97 of the thrust slide bearing part portion 99 relative to the annular lower surface 9 of the upper casing base portion 10 of the slide bearing 1 and the inner side surface 100 of the radial slide bearing part portion 102 at relation to the outer peripheral surface 27 of the thick-walled cylindrical portion 18.
DESCRIPTION OF REFERENCE NUMBER 1: plain bearing 2: top casing 3: bottom casing 4: annular space 5: plain bearing part 6: 7: span 8: sealing member 110: inner peripheral side annular sealing portion 113: portion Outer Peripheral Side Ring Seal 115: Connecting Portion

权利要求:
Claims (6)
[0001]
1. Thrust sliding bearing made of synthetic resin (1) comprising: a top liner made of synthetic resin (2) integrally including an annular top liner base portion (10) having an annular bottom surface (9) in an axial direction, an inner peripheral side cylindrical suspended portion (12) suspended from a radially inner peripheral end portion (11) of the annular lower surface (9) of the upper casing base portion (10), and a suspended portion outer peripheral side cylindrical (14) suspended from a radially outer peripheral end portion (13) of the annular lower surface (9) of the upper casing base portion (10); a bottom liner made of synthetic resin (3) which integrally includes an annular bottom liner base portion (39) having an annular top surface (38) in the axial direction and superimposed on said top liner (2) so as to being able to rotate about a geometric axis with respect to said upper coating (2) and an annular protrusion (40) protruding from the annular upper surface (38) of the lower coating base portion (39) towards the annular lower surface ( 9) the top cladding base portion (10); a sliding bearing piece made of synthetic resin (5) disposed in an annular space (4) between the annular lower surface (9) of the upper casing base portion (10) and an annular upper surface (48) of the annular protrusion ( 40) of the lower shell base portion (39) and in an annular space between an outer peripheral surface of the inner peripheral side cylindrical suspended portion (12) and an inner cylindrical peripheral surface of the annular protrusion (40) so as to be brought to an axial annular upper surface and the radial inner cylindrical peripheral surface thereof in sliding contact with the annular lower surface (9) of the upper casing base portion (10) and a radial outer peripheral surface of the peripheral side cylindrical suspended portion inner (12), while being brought to an axial annular lower surface and a radial cylindrical outer peripheral surface thereof in contact with an annular upper surface. axial and a radial inner cylindrical peripheral surface of the annular protrusion (40), CHARACTERIZED by the fact that said thrust sliding bearing made of synthetic resin (1) additionally includes a sealing member made of synthetic resin (8) having in a radially inner peripheral side thereof a flexible inner peripheral side annular sealing portion (110) which is brought into contact with a radially outer peripheral surface of the inner peripheral side cylindrical suspended portion (12) of said top shell (2) so as to seal a gap (6) between the inner peripheral side cylindrical suspended portion (12) of said upper casing (2) and the annular protrusion (40) of the lower casing base portion (39), which has a radially outer peripheral side thereof a flexible outer peripheral side annular sealing portion (113) which is brought into contact with the radially inner peripheral surface of the overhang portion and outer peripheral side cylindrical (14) of said upper coating (2) so as to seal a gap (7) between the outer peripheral side cylindrical suspended portion (14) of said upper coating (2) and the annular protuberance (40) of the bottom liner base portion (39), and the sealing member made of synthetic resin (8) additionally has connecting portions (115) for connecting the inner peripheral side annular sealing portion (110) and the outer peripheral side annular sealing portion (113), wherein the inner peripheral side annular sealing portion (110) and outer peripheral side annular sealing portion (113) are molded integrally with the connecting portions ( 115) having respective columnar portions (115a) disposed in a plurality of orifice portions (68a) in the annular upper surface (48) of the annular protrusion (40) of the lower casing base portion (39), and wherein the portion inner peripheral side annular seal the (110) includes an annular inner peripheral sealing base portion (116) which is joined to a cylindrical inner surface of the annular protrusion (40) of the lower liner base portion (39) such as to cover a plurality of protrusions (66) which are integrally formed on the cylindrical inner surface of the annular protrusion (40) along a circumferential direction, and the inner peripheral side annular sealing portion (110) further includes a flexible inner peripheral sealing portion (117 ) which is connected to a radially inner peripheral end portion (118) of the inner peripheral sealing base portion (116) and which is elastically brought into flexural contact with an outer peripheral surface of the inner peripheral side cylindrical suspended portion (12 ) of said top liner (2), and wherein the inner peripheral sealing portion (117) has a thickness less than the thickness of the inner peripheral sealing base portion a (116) and extends diagonally downward from an outer peripheral end portion connected to the inner peripheral end portion (118) of the inner peripheral sealing base portion (116), and/or wherein the annular sealing portion of outer peripheral side (113) includes an annular outer peripheral sealing base portion (119) which is joined to an outer peripheral surface which continues to an annular flat portion of the annular protrusion (40) of the lower liner base portion (39) such as to cover the outer peripheral surface and a plurality of protrusions (58) formed integrally on the outer peripheral surface along the circumferential direction, and the outer peripheral side annular sealing portion (113) further includes an outer peripheral sealing portion flexible (120) which is connected to the outer peripheral sealing base portion (119) and is elastically brought into flexural contact with an inner peripheral surface (32) d and a transversely trapezoidal cylindrical portion (33) of the outer peripheral side cylindrical suspended portion (14), and wherein the outer peripheral sealing portion (120) has a thickness less than the thickness of the outer peripheral sealing base portion ( 119) and extends diagonally downward from an inner peripheral end portion (121) connected to the outer peripheral end portion of the outer peripheral sealing base portion (119).
[0002]
2. Sliding bearing made of synthetic resin (1), according to claim 1, CHARACTERIZED by the fact that the plurality of orifice portions (68a) are respectively located in discontinuous portions (72), each located between adjacent ones. plurality of curved portions (50) projecting upwardly from an outer peripheral edge portion of the annular upper surface (48) of the annular protrusion (40) of the lower casing base portion (39) along the circumferential direction, at that the annular protrusion (40) of the lower casing base portion (39) has a recessed groove on an outer peripheral side (79) which is open at one radially outer end thereof to a radially outer side and is open at another radially outer end. internal thereof to the orifice portion (68a), and a recessed groove on the inner peripheral side (83c) which is open at a radially external end thereof to the orifice portion. end (68a) and is open to another radially inner end thereof to a radially inner side, and wherein each of the connecting portions (115) has an outer connecting portion (115b) whose radially inner side is formed integrally with the columnar portion (115a), whose radially outer side is formed integrally with the outer peripheral side annular sealing portion, and which is disposed in the recessed groove on the outer peripheral side (79), and an inner connecting portion (115c) of which radially outer side is formed integrally with the columnar portion (115a), which radially inner side is formed integrally with the inner peripheral side annular sealing portion (110), and which is disposed in the recessed groove on inner peripheral side (83c).
[0003]
3. Sliding bearing made of synthetic resin (1), according to any one of claims 1 to 2, CHARACTERIZED by the fact that the sliding bearing part (5) includes an annular thrust sliding bearing part portion (99) which has an annular upper surface (97) which is brought into sliding contact with the annular lower surface (9) of the upper shell base portion (10) and an annular lower surface (98) which is brought into contact with the annular upper surface (48) of the annular protuberance (40) of the bottom liner base portion (39); a cylindrical radial slide bearing piece portion (102) which is integrally formed at an end portion thereof in an end portion of the thrust slide bearing piece portion (99) such as to extend axially downwardly to the from an end portion of the thrust sliding bearing part portion (99) and has an annular inner side surface (100) which is brought into sliding contact with the outer peripheral surface of the inner peripheral side cylindrical suspended portion ( 12) of the upper shell base portion (10) and an annular outer side surface (101) which is brought into contact with the inner peripheral surface (62) of the annular protrusion (40) of the lower shell base portion ( 39); and a plurality of radially projecting plate piece portions (104) that project radially outwardly from an outer peripheral surface (103) of the thrust slide bearing piece portion (99) and are respectively disposed between adjacent ones. plurality of curved portions (50) projecting upwardly in the outer peripheral edge portion of the annular upper surface (48) of the annular protuberance (40) of the lower casing base portion (39) along the outer peripheral edge portion in the circumferential direction, so that the sliding bearing piece (5) does not rotate in the circumferential direction with respect to said lower coating (3).
[0004]
4. Sleeve bearing made of synthetic resin (1), according to claim 3, CHARACTERIZED by the fact that the thrust sleeve bearing part portion (99) has an annular groove (105) provided on an inner peripheral side of the annular upper surface (97) thereof and a plurality of annular grooves (106) which are open at ends thereof to the annular groove (105) and are open at other ends thereof to the outer peripheral surface (103), and which are provided on the upper surface (97) being spaced apart from one another at equivalent intervals in the circumferential direction, and the radial slide bearing piece portion (102) has a plurality of axial grooves (107) which are open at both its ends and are provided on the annular inner side surface (100) being spaced apart from each other at equivalent intervals in the circumferential direction.
[0005]
5. Sleeve bearing made of synthetic resin (1), according to claim 3, CHARACTERIZED by the fact that the thrust sleeve bearing part portion (99) has pluralities of internal recessed portions (122) and external recessed portions ( 123) which are formed on the annular upper surface (97) thereof along the circumferential direction and in at least two rows including an inner row and an outer row in the radial direction, and the radial slide bearing part portion (102) has a plurality of axial grooves (107) which are open at both ends thereof and are provided on the annular inner side surface (100) being spaced apart from each other at equivalent intervals in the circumferential direction.
[0006]
6. Sliding bearing made of synthetic resin (1), according to any one of claims 1 to 5, CHARACTERIZED by the fact that the inner peripheral side annular sealing portion (110) and the outer peripheral side annular sealing portion (113) are molded by inserting into the annular protuberance (40) of the bottom liner base portion (39) together with the connecting portions (115).

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同族专利:

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公开号 | 公开日

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CN105805171A|2016-07-27|

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KR20140146182A|2014-12-24|

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KR101496906B1|2015-02-27|

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US9091297B2|2015-07-28|

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EP2719910A4|2015-03-25|

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KR101834730B1|2018-03-06|

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WO2012169130A1|2012-12-13|

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RU2557640C1|2015-07-27|

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CN103597228B|2017-08-01|

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JP5906590B2|2016-04-20|

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KR20140009547A|2014-01-22|

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RU2597257C2|2016-09-10|

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US20150316099A1|2015-11-05|

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CN103597228A|2014-02-19|

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EP2719910A1|2014-04-16|

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CN105805171B|2018-07-27|

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BR112013030402A2|2016-12-13|

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EP2719910B1|2018-07-18|

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RU2015119997A|2015-12-27|

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US20140112605A1|2014-04-24|

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US9618035B2|2017-04-11|

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JP2012255500A|2012-12-27|

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法律状态:
2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2020-07-21| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-05-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-06-08| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 23/05/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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JP2011-129325|2011-06-09|

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JP2011129325A|JP5906590B2|2011-06-09|2011-06-09|Synthetic plastic plain bearing|

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PCT/JP2012/003361|WO2012169130A1|2011-06-09|2012-05-23|Synthetic-resin plain bearing|

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