• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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  • 优先权
    • 专利摘要:
    SLIDE SLIPPING BEARING MADE OF SYNTHETIC RESIN. This is a synthetic resin thrust bearing (1) which is equipped with: a synthetic resin upper casing (12); a synthetic resin underbody (22); a synthetic resin thrust bearing portion (33) disposed between the upper housing (12) and the lower housing (22); an outer elastic sealing member (47) having an inner elastically deformable flap portion (43) and an outer elastically deformable flap portion (46); and an inner elastic sealing member (54) having an outer elastically deformable flap portion (50) and an inner elastically deformable flap portion (53).
    公开号:BR112013019313B1
    申请号:R112013019313-1
    申请日:2012-02-15
    公开日:2021-04-20
    发明作者:Kouichi Morishige；Ryohei Kaneko
    申请人:Oiles Corporation；
    IPC主号:
    专利说明:

    FIELD OF TECHNIQUE
    The present invention relates to a sliding thrust bearing made of synthetic resin. BACKGROUND TECHNIQUE
    Generally, a stay type suspension used for a front wheel of a four-wheel vehicle has a structure in which a stay assembly incorporating a hydraulic shock absorber in an outer cylinder integrated with a main axle is combined with a coil spring. . Among such suspensions, there is a type in which when the stay assembly rotates together with the coil spring in the steering operation, the piston bar of the stay assembly rotates, and there is another type in which the piston bar does not rotate. In both types, there are cases where, instead of a rolling bearing, a synthetic resin thrust bearing is used between a mechanism to mount the stay assembly to the vehicle body and an upper spring seat member coil spring to allow smooth rotation of the stay assembly. PRIOR TECHNICAL DOCUMENTS
    PATENT DOCUMENTS [Patent Document 1] JP-A-2010-53908 [Patent Document 2] JP-A-2010-31949 [Patent Document 3] JP-A-2009-257516 SUMMARY OF THE INVENTION PROBLEMS THAT THE INVENTION MUST SOLVE
    In such a slide bearing made of synthetic resin which includes an upper housing made of synthetic resin, a lower housing made of synthetic resin superimposed on the upper housing so as to be rotatable about the geometric axis of the upper housing, and a bearing piece strut slide made of synthetic resin placed between the upper shell and the lower shell, labyrinth means making use of gaps between the projection portions are provided on the inner peripheral side and on the outer peripheral side between the upper shell and the lower shell a in order to prevent the ingress of dust, muddy water and the like in the inner part between the upper casing and the lower casing.
    However, with such labyrinth means, there are cases where it is impossible to obtain a sufficient effect of preventing the ingress of dust, muddy water and the like under severe conditions, so that if dust, muddy water and the like enter the upper casing and the like. lower housing, a smooth relative rotation of the lower housing relative to the upper housing cannot be obtained, possibly resulting in the generation of abnormal noise.
    The present invention has been conceived in view of the aspects described above, and its objective is to provide a sliding thrust bearing made of synthetic resin which, even under severe conditions, makes it possible to effectively prevent the ingress of dust, muddy water and the like, and It has the ability to reduce the generation of abnormal noise due to ingress of dust, muddy water and the like. MEANS TO SOLVE PROBLEMS
    A thrust bearing made of synthetic resin in accordance with the present invention comprises: an upper housing made of synthetic resin that includes an upper annular plate-like portion, an outer cylindrical portion formed integrally with an outer annular end portion of the like portion the upper annular plate on an upper annular end portion thereof and suspended downwardly from the outer annular end portion, and an inner cylindrical portion formed integrally with an inner annular end portion of the upper annular plate-like portion at an upper annular end portion thereof and suspended downwardly from the inner annular end portion; a lower housing made of synthetic resin which is superimposed on the upper housing so as to be rotatable about a geometric axis of the upper housing and includes a lower annular plate-like portion and a cylindrical portion formed integrally with an annular upper surface of the similar portion the lower annular plate is vertically erect from the upper annular surface; a strut sliding bearing piece made of synthetic resin which is placed between the upper housing and the lower housing and includes an annular plate-like portion in contact with an annular lower surface of the upper annular plate-like portion on an annular upper surface of the same so as to be rotatable about the geometric axis of the upper shell and in contact with the annular upper surface of the cylindrical portion of the lower shell on an annular lower surface thereof and a cylindrical portion formed integrally with an inner annular end portion of the portion similar to the annular plate in an upper annular end portion thereof and suspended downwardly from the inner annular end portion; an outer elastic sealing member which is in contact with an outer surface of the cylindrical portion of the lower shell in an inner elastically deformable flap portion thereof integrally formed in a cylindrical inner surface thereof such as to protrude diagonally inwardly and to up from the cylindrical inner surface and which is in contact with an inner surface of the outer cylindrical portion of the upper casing in an outer elastically deformable flap portion thereof integrally formed in a cylindrical outer surface thereof in such a way as to protrude diagonally to out and down from the cylindrical outer surface; and an inner elastic sealing member which is in contact with an inner surface of the cylindrical portion of the lower housing in an outer elastically deformable flap portion thereof integrally formed in a cylindrical outer surface thereof such as to project diagonally outwardly and upwards from the cylindrical outer surface and which is in contact with an outer surface of the inner cylindrical portion of the upper casing in an inner elastically deformable flap portion thereof integrally formed in a cylindrical inner surface thereof in such a way as to project diagonally inward and downward from the inner cylindrical surface, wherein a surface of the outer cylindrical portion of the lower end annular of the upper shell is opposite the upper annular surface of the lower shell-like lower shell-like portion of the lower shell with a gap therebetween, the inner surface of the outer cylindrical portion of the inv. The upper shell has a truncated cone-shaped inner surface which is continuously connected to the lower surface of the upper annular plate-like portion and with which the outer elastically deformable flap portion of the outer elastic sealing member is in contact, the surface outer surface of the cylindrical portion of the lower shell has a small diameter cylindrical outer surface with which the inner elastically deformable flap portion of the outer elastic sealing member is in contact, a large diameter cylindrical outer surface having a larger diameter than the surface cylindrical outer surface of small diameter, and an annular stepped surface which is disposed between the cylindrical outer surface of small diameter and the cylindrical outer surface of large diameter and with which an annular lower surface of the outer elastic sealing member is in contact, the surface outer part of the inner cylindrical portion of the upper casing has a a large diameter cylindrical outer surface that is continuously connected to the lower surface of the upper annular plate-like portion and a small diameter cylindrical outer surface that is continuously connected to the large diameter cylindrical outer surface and has a smaller diameter than the cylindrical outer surface of large diameter, and with which the inner elastically deformable flap portion of the inner elastic sealing member is in contact, the inner surface of the cylindrical portion of the lower housing has a cylindrical inner surface of small diameter continuously connected to an annular inner surface of the lower annular plate-like portion of the lower housing, a large diameter cylindrical inner surface having a larger diameter than the small diameter cylindrical inner surface and continuously connected to the annular upper surface of the cylindrical portion of the lower housing , a cylindrical inner surface i intermediate that has a larger diameter than the small diameter cylindrical inner surface but which has a smaller diameter than the large diameter cylindrical inner surface and with which the outer elastically deformable flap portion of the inner elastic sealing member is in contact, a lower annular stepped surface which is disposed between the small diameter cylindrical inner surface and the intermediate cylindrical inner surface and with which an annular lower surface of the inner elastic sealing member is in contact, and an upper annular stepped surface disposed between the inner surface intermediate cylindrical and large diameter cylindrical inner surface, the annular lower end surface of the inner cylindrical portion of the upper shell, which is continuously connected to the small diameter cylindrical outer surface of the inner cylindrical portion of the upper shell, is opposite the surface lower annular staggered of the cylindrical portion of the lower casing with a gap therebetween, and the cylindrical portion of the thrust sliding bearing piece is disposed between the large diameter cylindrical outer surface of the outer surface of the cylindrical inner portion of the upper casing and the cylindrical inner surface of large diameter of the inner surface of the cylindrical portion of the lower housing.
    According to the thrust sliding bearing made of synthetic resin in accordance with the present invention, the outer elastic sealing member is in contact with the small diameter cylindrical outer surface of the outer surface of the cylindrical portion of the lower casing at its flange portion elastically deformable inner integrally formed on the cylindrical inner surface in such a way as to protrude diagonally inward and upward from that cylindrical inner surface, and is also in contact with the truncated cone-shaped inner surface of the inner surface of the outer cylindrical portion of the upper casing in its outer elastically deformable flap portion integrally formed on the cylindrical outer surface in such a way as to protrude diagonally outward and downward from that cylindrical outer surface, and is in further contact with the stepped annular surface of the outer surface of the portion casing cylindrical the lower surface on its lower annular surface. The inner elastic sealing member is in contact with the intermediate cylindrical inner surface of the inner surface of the cylindrical portion of the lower shell in its outer elastically deformable flap portion integrally formed on the inner cylindrical surface such as to project diagonally outward and upward from that cylindrical outer surface, it is also in contact with the small diameter cylindrical outer surface of the outer surface of the inner cylindrical portion of the upper shell in its inner elastically deformable flap portion formed integrally on the cylindrical inner surface in such a way as to project diagonally inwardly and downwardly from that cylindrical inner surface, and is further in contact with the lower annular stepped surface of the inner surface of the cylindrical portion of the lower housing on its annular lower surface. Therefore, even under severe conditions, it is possible to effectively prevent the ingress of dust, muddy water and the like into an annular space, which is located between the annular lower surface of the upper annular plate-like portion and the annular upper surface of the portion. cylindrical portion of the lower shell to accommodate the annular plate-like portion of the strut sliding bearing piece, through the annular gap between the surface of the annular lower end outer cylindrical portion of the upper shell and the annular upper surface of the lower annular plate-like portion of the lower shell and through the annular gap between the annular lower end surface of the inner cylindrical portion of the upper shell and the lower annular stepped surface of the cylindrical portion of the lower shell, thereby enabling to reduce the generation of abnormal noise due to ingress of dust, muddy water and the like.
    In the present invention, the inner surface of the outer cylindrical portion of the upper casing may have a cylindrical inner surface which is continuously connected at an annular upper end thereof to the annular lower end of the truncated cone shaped inner surface and is connected in a manner continuous on an annular lower end thereof to the annular inner edge of the surface of the annular lower end outer cylindrical portion of the upper shell, or the inner surface of the outer cylindrical portion of the upper shell may have an upwardly truncated conical surface connected continuously to the annular lower end of the truncated cone-shaped inner surface in a large diameter annular upper end thereof and having a small diameter annular lower end smaller in diameter than the large diameter annular upper end, and a truncated conical surface for bass continuously connected to the extr. small diameter annular lower edge of the conical surface truncated upward at a small diameter annular upper end thereof and having a large diameter annular lower edge greater in diameter than the small diameter annular upper edge.
    Furthermore, in the present invention, each of the outer elastic sealing member and the inner elastic sealing member may include an elastic sealing body having corresponding portions of the elastically deformable flap portions and a metal core incorporated in the sealing body elastic.
    In a preferred example, the lower casing may have a plurality of projection portions formed integrally on the upper annular surface of its cylindrical portion and separated from each other in the direction around the geometric axis, and the annular plate-like portion of the bearing piece. strut slider may have a plurality of recessed portions or notches for receiving respective portions among the plurality of lower housing projecting portions. As a result, the thrust bearing sliding part, with respect to rotation about the geometric axis, becomes fixed with respect to the lower shell and becomes rotatable with respect to the upper shell, with the result that the upper shell becomes rotatable with respect to the lower casing around the geometric axis of the upper casing.
    In another preferred example, the annular lower surface of the outer elastic sealing member may have at least one elastically deformable annular projection surface, and the annular lower surface of the inner elastic sealing member may have at least one elastically deformable annular projection surface. If such elastically deformable annular projection surfaces are provided, the sealing ability of the annular lower surface of the outer elastic sealing member and the annular lower surface of the inner elastic sealing member can be improved through the elastic deformation of these annular projection surfaces, of so that the ingress of dust, muddy water and the like into the annular space that accommodates the annular plate-like portion of the strut sliding bearing piece can be more effectively prevented, thereby making it possible to more satisfactorily reduce the generation of abnormal noise due to ingress of dust, muddy water and the like.
    Furthermore, in the present invention, the outer surface of the cylindrical portion of the lower casing may have a radially projecting cylindrical outer surface that is continuously connected to the annular upper surface of the cylindrical portion at an annular upper edge and which has a diameter greater than the small diameter cylindrical outer surface with which the inner elastically deformable flap portion of the outer elastic sealing member is in contact, while the small diameter cylindrical outer surface with which the inner elastically deformable flap portion of the elastic sealing member is in contact, can be arranged in the axial direction between the radially projecting cylindrical outer surface and the annular stepped surface with which the annular lower surface of the outer elastic sealing member is in contact, while the inner surface of the cylindrical portion of the lower casing may have an annular stepped surface that projects axially that is continuously connected to the annular upper edge of the large diameter cylindrical inner surface of the cylindrical portion at an annular inner edge thereof and which is closest to an annular lower end surface of the inner cylindrical portion of the upper casing in the direction axial than the lower annular stepped surface with which the lower annular surface of the inner elastic sealing member is in contact, while the lower annular stepped surface with which the lower annular surface of the inner elastic sealing member is in contact, may be disposed in the radial direction between the axially projecting annular stepped surface and the intermediate cylindrical inner surface. If such a radially projecting cylindrical outer surface and such axially projecting annular stepped surface are provided, it is possible to satisfactorily effect the positioning of the outer elastic sealing member and the inner elastic sealing member.
    The upper shell and the lower shell can be formed of a lower shell that includes at least one of polyacetal resin, polyamide resin, thermoplastic polyester resin, polyolefin resin, polycarbonate resin and fluororesin. The thrust sliding bearing piece may be formed from a lower shell that includes at least one of polyacetal resin, polyamide resin, thermoplastic polyester resin, polyolefin resin, and fluororesin. With respect to each of the upper casing and the lower casing, a lower casing similar to the bottom casing constituting the thrust sliding bearing piece can be used, but particularly a bottom casing is used which exhibits satisfactory friction characteristics when combined with the lower casing used for the thrust thrust bearing piece. For the thrust bearing sliding bearing part and the upper and lower casings, the following combinations can be cited as examples: a combination of polyacetal resin and polyamide resin; a combination of a polyolefin resin, particularly polyethylene resin, and polyacetal resin; a combination of polyacetal resin and a thermoplastic polyester resin, particularly polybutylene terephthalate resin; and a combination of polyacetal resin and polyacetal resin. ADVANTAGES OF THE INVENTION
    According to the present invention, it is possible to provide a thrust thrust bearing made of synthetic resin which, even under severe conditions, enables the effective prevention of the ingress of dust, muddy water and the like, and has the ability to reduce noise generation. abnormal due to ingress of dust, muddy water and the like. BRIEF DESCRIPTION OF THE DRAWINGS
    Figure 1 is an explanatory front cross-sectional view of an embodiment of the present invention;
    Figure 2 is an explanatory cross-sectional view, taken in the direction of arrows II to II shown in Figure 3, of a lower housing shown in Figure 1;
    Figure 3 is an explanatory plan view of the lower housing shown in Figure 1;
    Figure 4 is an explanatory enlarged front cross-sectional view of a right portion of the embodiment shown in Figure 1;
    Figure 5 is an explanatory enlarged front cross-sectional view of a left portion of the embodiment shown in Figure 1;
    Figure 6 is an explanatory plan view of a strut sliding bearing piece shown in Figure 1;
    Figure 7 is an explanatory cross-sectional view, taken in the direction of arrows VII to VII shown in Figure 6, of the strut sliding bearing piece shown in Figure 1;
    Figure 8 is an explanatory partial cross-sectional view of an outer elastic sealing member shown in Figure 1;
    Figure 9 is an explanatory partial cross-sectional view of an inner elastic sealing member shown in Figure 1;
    Figure 10 is an explanatory enlarged front cross-sectional view, corresponding to Figure 4, of the right portion in accordance with another embodiment of the present invention;
    Figure 11 is an explanatory enlarged front cross-sectional view, corresponding to Figure 5, of the left portion in accordance with the other embodiment shown in Figure 10; and
    Figure 12 is an explanatory plan view, corresponding to Figure 3, of the lower housing in accordance with the other embodiment shown in Figure 10. WAY TO CARRY OUT THE INVENTION
    Hereinafter, a more detailed description will be given of the mode for carrying out the invention based on the preferred embodiments illustrated in the drawings. It should be noted that the present invention is not limited to these embodiments.
    In Figures 1 to 9, a synthetic resin thrust bearing 1 of this embodiment comprises an upper shell made of synthetic resin 12 which includes a portion similar to the upper annular plate 2, an outer cylindrical portion 5 formed integrally with a portion. of outer annular end portion 3 of the upper annular plate-like portion 2 in its upper annular end portion 4 and suspended downwardly from that outer annular end portion 3, an inner cylindrical portion 8 formed integrally with an inner annular end portion 6 of the upper annular plate-like portion 2 at its upper annular end portion 7 and suspended downwardly from that inner annular end portion 6, and an annular projection portion 11 having a flat upper surface 10 formed integrally with a annular upper surface 9 of the upper annular plate-like portion 2; a lower shell made of synthetic resin 22 which is superimposed on the upper shell 12 so as to be rotatable in a direction R around the geometric axis O of the upper shell 12 and includes a portion similar to the lower annular plate 15, a cylindrical portion 17 formed integrally in an annular upper surface 16 of the lower annular plate-like portion 15 and erect vertically from that annular upper surface 16, a cylindrical suspended portion 19 integrally formed on a radially inner side of an annular lower surface 18 of the portion similar to lower annular plate 15 and suspended downwardly from that lower annular surface 18, and a plurality of projecting portions 21 integrally formed on a radially outer edge portion of an annular upper surface 20 of the cylindrical portion 17 and separated from one another at the direction R which is a direction around the geometric axis O; a strut sliding bearing piece made of synthetic resin 33 which is placed between the upper housing 12 and the lower housing 22 and includes an annular plate-like portion 28 in contact with an annular lower surface 25 of the upper annular plate-like portion 2 on its annular upper surface 26 so as to be rotatable in the R direction around the geometric axis O of the upper shell 12 and also in contact with the annular upper surface 20 of the cylindrical portion 17 of the lower shell 22 on its annular lower surface 27 and a cylindrical portion 31 formed integrally with an inner annular end portion 29 of the annular plate-like portion 28 at its upper annular end portion 30 and suspended downwardly from that inner annular end portion 29; an outer elastic sealing member 47 which is in contact with an outer surface 41 of the cylindrical portion 17 of the lower housing 22 in its inner elastically deformable flap portion 43 integrally formed on its cylindrical inner surface 42 such as to project diagonally inward and upward from that cylindrical inner surface 42 and which is also in contact with an inner surface 44 of the outer cylindrical portion 5 of the upper housing 12 in its outer elastically deformable flap portion 46 integrally formed in its cylindrical outer surface 45 of such 5 so as to protrude diagonally outward and downward from that cylindrical outer surface 45; and an inner elastic sealing member 54 which is in contact with an inner surface 48 of the cylindrical portion 17 of the lower housing 22 in its outer elastically deformable flap portion 50 formed integrally in its cylindrical outer surface 49 such as to project diagonally out and up from that cylindrical outer surface 49 and which is also in contact with an outer surface 51 of the inner cylindrical portion 8 of the upper housing 12 in its inner elastically deformable flap portion 53 integrally formed in its cylindrical inner surface 52 of such as to protrude diagonally inward and downward from that cylindrical inner surface 52.
    In the upper shell 12, an annular lower end surface 61 of its outer cylindrical portion 5 is opposite the annular upper surface 16 of the lower annular plate-like portion 15 of the lower shell 22 20 with an annular gap 62 therebetween, and the surface The inner 44 of its outer cylindrical portion 5 has a truncated cone-shaped inner surface 65 which is continuously connected to the lower surface 25 of the upper annular plate-like portion 2 and with which the outer elastically deformable flap portion 46 of the member outer elastic seal 25 47 is in contact and a cylindrical inner surface 66 which is continuously connected at its annular upper end to the annular lower end of the truncated cone-shaped inner surface 65 and is continuously connected at its annular lower end to the annular inner edge of the annular lower end surface 61, wherein said cylindrical inner surface 66 is opposite a large diameter cylindrical outer surface 67 of outer surface 41 of cylindrical portion 17 with a cylindrical span 64 therebetween, and outer surface 51 of inner cylindrical portion 8 has a large diameter cylindrical outer surface 69 which is continuously connected to the lower surface 25 of the upper annular plate-like portion 2 and a small diameter cylindrical outer surface 70 which is continuously connected to the large diameter cylindrical outer surface 69 and has a smaller diameter than that large diameter cylindrical outer surface 69, and with which the inner elastically deformable flap portion 53 of the inner elastic sealing member 54 is in contact.
    In the lower housing 22, the outer surface 41 of its cylindrical portion 17 has a small diameter cylindrical outer surface 75 with which the inner elastically deformable flap portion 43 of the outer elastic sealing member 47 is in contact, the cylindrical outer surface of large diameter 67 which has a larger diameter than the small diameter cylindrical outer surface 75, an annular stepped surface 76 which is disposed between the small diameter cylindrical outer surface 75 and the large diameter cylindrical outer surface 67 and with which a surface The annular lower surface 68 of the outer elastic sealing member 47 is in contact, and a radially projecting cylindrical outer surface 77 continuously connected to the annular upper surface 20 of the cylindrical portion 17 at its annular upper edge and having a diameter greater than the small diameter cylindrical outer surface 75 with which the inner elastically deformable flap portion 43 of the outer elastic sealing member 47 is in contact, while the inner surface 48 of its cylindrical portion 17 has a small diameter cylindrical inner surface 79 continuously connected to an annular inner surface 78 of the lower annular plate-like portion 15, a large diameter cylindrical inner surface 80 having a larger diameter than the small diameter cylindrical inner surface 79 and continuously connected to the annular upper surface 20 of the cylindrical portion 17, an intermediate cylindrical inner surface 81 having a larger diameter than the surface small diameter cylindrical inner surface 79 but having a smaller diameter than the large diameter cylindrical inner surface 80 and with which the outer elastically deformable flap portion 50 of the inner elastic sealing member 54 is in contact, a lower annular stepped surface. 83 which is disposed between the small diameter cylindrical inner surface 79 and the surface an intermediate cylindrical inner surface 81 and with which an annular lower surface 82 of the inner elastic sealing member 54 is in contact, an upper annular stepped surface 84 disposed between the intermediate cylindrical inner surface 81 and the large diameter cylindrical inner surface 80, and an axially projecting annular stepped surface 86 which is continuously connected to the annular upper edge of the small diameter cylindrical inner surface 79 of the cylindrical portion 17 at its annular inner edge and which is closest to an annular lower end surface 85 of the inner cylindrical portion 8 of upper housing 12 in the axial direction than lower annular stepped surface 83 with which lower annular surface 82 of inner elastic sealing member 54 is in contact.
    The annular lower end surface 85 of the inner cylindrical portion 8 of the upper housing 12, which is continuously connected to the small diameter cylindrical outer surface 70 of the inner cylindrical portion 8 of the upper housing 12, is opposite the lower annular stepped surface 83 and to the axially projecting annular stepped surface 86 of the cylindrical portion 17 of the lower housing 22 with an annular gap 87 therebetween.
    The small diameter cylindrical outer surface 75, with which the inner elastically deformable flap portion 43 of the outer elastic sealing member 47 is in contact, is disposed in the axial direction between the radially projecting cylindrical outer surface 77 and the stepped surface annular 76 with which the lower annular surface 68 of the outer elastic seal member 47 is in contact, and the lower annular stepped surface 83 with which the lower annular surface 82 of the inner elastic seal member 54 is in contact, is disposed in the radial direction between the axially projecting annular stepped surface 86 and the intermediate cylindrical inner surface 81.
    The outer elastic sealing member 47 includes an elastic sealing body 91 having elastically deformable flap portions 43 and 46 and a metal core 92 incorporated in the elastic sealing body 91, and the annular lower surface 68 of the elastic sealing member outer 47 has and concentrically disposed and elastically deformable annular projecting surfaces 10 93 and 94, and is elastically in contact with the annular stepped surface 76 via annular projecting surfaces 93 and 94. Similarly, the inner elastic sealing member 54 includes an elastic sealing body 95 having elastically deformable flap portions 50 and 53 and a metal core 96 incorporated in the elastic sealing body 93, and the annular lower surface 82 of the inner elastic sealing member 54 has surfaces of concentrically deformable and concentrically arranged annular projections 97 and 98, and is elastically in contact with the lower annular stepped surface 83 per m eio of the annular projection surfaces 97 and 98.
    The annular plate-like portion 28 of the thrust sliding bearing piece 33 includes an annular plate-like portion body 110 having the annular top surface 26 and a plurality of radially projecting portions 113 that are integrally formed in a cylindrical outer surface 111 of the annular plate-like portion body 110 such as to project radially from the cylindrical outer surface 111 and to be separated from each other in the R direction, and defining a plurality of recessed portions 112 separate from each other. of the others in the R direction to receive the respective portions of the projecting portions 21 of the lower housing 22. The upper annular surface 26 is formed with an annular groove 114 and a plurality of radial grooves 115 each of which is open to the annular groove. 114 at one end thereof and open to the cylindrical outer surface 111 at the other end thereof, and are arranged in such a way as to be separated one another in the R direction, the annular groove 114 and the radial grooves 115 serving as lubricant reservoirs for grease or the like. The cylindrical portion 31 of the thrust sliding bearing piece 33 has a cylindrical outer peripheral surface 116 which is brought into contact with the large diameter cylindrical inner surface 80 and a cylindrical inner peripheral surface 119 in which the axial grooves 118 each open at their upper side at the inner annular end portion 29 and 10 open at their lower side at an annular lower surface 117, are formed in such a way as to be separated from each other at equal distances in the R direction. thrust bearing 33 is disposed between the large diameter cylindrical outer surface 69 of the outer surface 51 of the inner cylindrical portion 8 of the upper housing 12 and the large diameter cylindrical inner surface 80 of the inner surface 48 of the cylindrical portion 17 of the lower housing 22 with a cylindrical gap between the large diameter cylindrical outer surface 69 and the inner peripheral surface ci 119. The axial grooves 118 serve as lubricant reservoirs for grease or the like in the same way as the annular groove 20 114 and the radial grooves 115.
    A piston bar of a stay assembly is disposed in the above-described sliding thrust bearing 1 passing through a through hole 122 defined by a cylindrical inner surface 121 of the inner cylindrical portion 8 and through a through hole 124 concentric 25 with through hole 122 is defined by annular inner surface 78 of lower annular plate-like portion 15, small diameter cylindrical inner surface 79 of cylindrical portion 17, and cylindrical inner surface 123 of overhanging cylindrical portion 19. strut 1 is thus mounted between a mechanism for mounting the stay assembly 30 to the vehicle body and an upper spring seat member of the coil spring. With such a thrust bearing 1, when the coil spring is rotated around the axis O in the R direction through the steering operation, the upper casing 12 is similarly rotated relatively in the R direction with respect to the lower casing 22. This rotation 5 of the upper housing 12 in the R direction is smoothly effected by rotating the lower annular surface 25 of the upper annular plate-like portion 2 of the upper housing 12 relative to the annular upper surface 26 of the annular plate-like portion 28 of the strut sliding bearing piece 33 placed between the upper housing 12 and the lower housing 22 so that the steering operation is performed without resistance.
    According to the thrust bearing 1, the outer elastic sealing member 47 is in contact with the small diameter cylindrical outer surface 75 of the outer surface 41 of the cylindrical portion 17 of the lower shell 22 in its inner elastically deformable flap portion 15 43 integrally formed on the cylindrical inner surface 42 such as to protrude diagonally inward and upward from that cylindrical inner surface 42, and is also in contact with the truncated cone-shaped inner surface 65 of the inner surface of the outer cylindrical portion 5 of the upper housing 12 in its outer elastically deformable flange portion 46 formed integrally on the cylindrical outer surface 45 such as to protrude diagonally outwardly and downwardly from that cylindrical outer surface 45, and is additionally in contact with the surface annular stepper 76 of the outer surface of the cylindrical portion 17 of the lower casing upper 22 on its annular bottom surface 68. The inner elastic seal member 54 is in contact with the intermediate cylindrical inner surface 81 of the inner surface 48 of the cylindrical portion 17 of the lower shell 22 in its integrally formed outer elastically deformable flap portion 50 on the cylindrical outer surface 49 in such a way as to protrude diagonally outward and upward from that cylindrical outer surface 49, it is also in contact with the small diameter cylindrical outer surface 70 of the outer surface 51 of the inner cylindrical portion 8 of the casing upper 12 in its inner elastically deformable flap portion 53 integrally formed on the inner cylindrical surface 52 such as to protrude diagonally inwardly and downwardly from that inner cylindrical surface 52, and is further in contact with the lower annular stepped surface 83 of the inner surface 48 of the cylindrical portion 17 of the in. lower shell 22 on its annular lower surface 82. Therefore, even under severe conditions, it is possible to effectively prevent the ingress of dust, muddy water and the like into an annular space 131 which is located between the annular lower surface 25 of the upper annular plate-like portion 2 and annular upper surface 20 of cylindrical portion 17 of lower casing 22 to accommodate annular plate-like portion 28 of strut sliding bearing piece 33, through annular gap 62 between lower end surface annular 61 of the outer cylindrical portion 5 of the upper housing 15 and the upper annular surface 16 of the lower annular plate-like portion 15 of the lower housing 22 and through the annular span 87 between the lower annular end surface 85 of the inner cylindrical portion 8 of the upper casing 12 and lower annular stepped surface 83 and axially projecting annular stepped surface 86 of cylindrical portion 17 of 2 The lower casing 22, thereby making it possible to reduce the generation of abnormal noise due to the ingress of dust, muddy water and the like.
    Furthermore, according to the thrust bearing 1, since the annular lower surface 68 of the outer elastic sealing member 47 has the annular elastically deformable projection surfaces 93 and 94 and the annular lower surface 82 of the elastic sealing member Inner 54 has elastically deformable annular projecting surfaces 97 and 98, the sealing ability of the annular lower surface 68 of the outer elastic sealing member 47 and the annular lower surface 82 of the inner elastic sealing member 54 can be improved through elastic deformation of these 30 annular projecting surfaces 93 and 94 as well as 97 and 98, so that the ingress of dust, muddy water and the like into the annular space 131 which accommodates the annular plate-like portion 28 of the thrust sliding bearing part 33 can be prevented more effectively, thereby making it possible to more satisfactorily reduce the generation of abnormal noise due to ingress of dust, water muddy and the like.
    Furthermore, according to the thrust bearing sliding 1, since the radially projecting cylindrical outer surface 77 and the axially projecting annular stepped surface 86 are provided, it is possible to satisfactorily effect the positioning of the elastic sealing member 10 outer 47 and inner elastic sealing member 54.
    With the strut slide bearing described above 1, although the inner surface 44 of the outer cylindrical portion 5 of the upper shell 12 has the truncated cone-shaped inner surface 65 and the cylindrical inner surface 66, as shown in Figures 10 to 12, the inner surface 15 44 of outer cylindrical portion 5 of upper housing 12 may have, in place of inner cylindrical surface 66 and in addition to truncated cone-shaped inner surface 65, an upwardly truncated conical surface 141 connected continuously to the annular lower end of the truncated cone-shaped inner surface 65 at its large diameter annular upper end and having a small diameter annular lower end smaller in diameter than that large diameter annular upper end, as well as a downward truncated conical surface 142 connected continuously to the small diameter annular lower end of the truncated upward conical surface 141 at its small diameter annular upper end and having a large diameter annular lower end greater in diameter than that small diameter annular upper end. In that case, the outer surface 41 of the cylindrical portion 17 of the lower housing 22 may further have, instead of the large diameter cylindrical outer surface 67, a curved recessed surface 30 143 of a complementary shape to the upwardly truncated conical surface 141 and the downwardly truncated conical surface 142, and the upwardly truncated conical surface 141 and the downwardly truncated conical surface 142 may be opposed to such curved recessed surface 143 with a gap 144 therebetween.
    Furthermore, with the strut sliding bearing 1, a plurality of prime-shaped or cylinder-shaped recesses 151, which are arranged separate from each other at equal distances in the R direction and are open in the annular upper surface 20, can be provided in the cylindrical portion 17 of the lower housing 22 in order to achieve a light weight, a uniform wall thickness, and the like. DESCRIPTION OF NUMERICAL REFERENCES
    1: strut sliding bearing 2: upper annular plate-like portion 3: outer annular end portion 4: upper annular end portion 5: outer cylindrical portion 6: inner annular end portion 7: upper annular end portion 8: portion inner cylindrical 9: annular upper surface 10: upper surface 11: annular projection portion 12: upper casing 15: lower annular plate-like portion 16: annular upper surface 17: cylindrical portion 18: annular lower surface 19: suspended cylindrical portion 20: annular upper surface 21: projection portion 22: lower casing 26: annular upper surface 27: annular lower surface 28: annular plate-like portion 5 29: inner annular end portion 30: upper annular end portion 31: cylindrical portion 33: strut sliding bearing part 41: outer surface 10 42: cylindrical inner surface 43: flap portion 44: inner surface 45: outer surface on cylindrical 46: flap portion 15 47: outer elastic sealing member 48: inner surface 49: outer cylindrical surface 50: flap portion 51: outer surface 20 52: inner cylindrical surface 53: flap portion 54: elastic sealing member internal
    权利要求:
    Claims (9)
    [0001]
    1. Synthetic resin thrust bearing (1) comprising: an upper casing made of synthetic resin (12) including an upper annular plate-like portion (2), an outer cylindrical portion (5) formed integrally with a portion of outer annular end portion (3) of the upper annular plate-like portion (2) in an upper annular end portion (4) thereof and suspended downwardly from the outer annular end portion (3), and a cylindrical portion inner (8) formed integrally in an inner annular end portion (6) of the upper annular plate-like portion (2) in an upper annular end portion (7) thereof and suspended downwardly from the annular end portion internal (6); a lower shell made of synthetic resin (22) which is superimposed on said upper shell (12) so as to be rotatable around a geometric axis of said upper shell (12) and includes a portion similar to lower annular plate (15) and a cylindrical portion (17) formed integrally with an annular upper surface (16) of the lower annular plate-like portion (15) and erect vertically from the annular upper surface (16); and a strut sliding bearing piece made of synthetic resin (33) which is placed between said upper housing (12) and said lower housing (22) and includes an annular plate-like portion (28) in contact with a surface. lower annular (25) of the upper annular plate-like portion (2) on an upper annular surface (26) thereof so as to be rotatable around the geometric axis of said upper casing (12) and in contact with the upper annular surface (20) of the cylindrical portion (17) of said lower housing (22) on an annular lower surface (27) thereof and a cylindrical portion (31) formed integrally with an inner annular end portion (29) of the plate-like portion annular (28) in an upper annular end portion (30) thereof and suspended downwardly from the inner annular end portion (29), CHARACTERIZED by the fact that said strut sliding bearing is made of synthetic resin (1 ) further comprises: a member of external elastic action (47) which is in contact with an external surface (41) of the cylindrical portion (17) of said lower casing (22) in an internal elastically deformable flap portion (43) thereof integrally formed in a cylindrical internal surface (42) thereof in such a way as to project diagonally inwards and upwards from the cylindrical inner surface (42) and which is in contact with an inner surface (44) of the outer cylindrical portion (5) of said upper casing ( 12) in an outer elastically deformable flap portion (46) thereof integrally formed in a cylindrical outer surface (45) thereof such as to protrude diagonally outwardly and downwardly from the cylindrical outer surface (45); and an inner elastic sealing member (54) which is in contact with an inner surface (48) of the cylindrical portion (17) of said lower housing (22) in an outer elastically deformable flap portion (50) thereof formed integrally with a cylindrical outer surface (49) thereof in such a way as to protrude diagonally outward and upward from the cylindrical outer surface (49) and which is in contact with an outer surface (51) of the inner cylindrical portion (8) of the said upper casing (12) on an internal elastically deformable flap portion (53) thereof integrally formed on a cylindrical inner surface (52) thereof in such a way as to protrude diagonally inwardly and downwardly from the cylindrical inner surface ( 52), wherein an annular lower end surface (61) of the outer cylindrical portion (5) of said upper casing (12) is opposite the annular upper surface (16) of the lower annular plate-like portion (15) of the said lower housing (22) with a gap (62) therebetween, the inner surface (44) of the outer cylindrical portion (5) of said upper housing (12) has a truncated cone-shaped inner surface (65) which is continuously connected to the lower surface (25) of the upper annular plate-like portion (2) and with which the outer elastically deformable flap portion (46) of said outer elastic sealing member (47) is in contact, the surface The outer (41) of the cylindrical portion (17) of said lower casing (22) has a cylindrical outer surface of small diameter (75) with which the inner elastically deformable flap portion (43) of said outer elastic sealing member (47 ) is in contact, a large diameter cylindrical outer surface (67) that has a larger diameter than the small diameter cylindrical outer surface (75), and an annular stepped surface (76) that is disposed between the cylindrical outer surface of diameter small (75) and sup cylindrical outer surface of large diameter (67) and with which an annular lower surface (68) of said outer elastic sealing member (47) is in contact, the outer surface (51) of the inner cylindrical portion (8) of said housing The upper (12) has a large diameter cylindrical outer surface (69) which is continuously connected to the lower surface (25) of the upper annular plate-like portion (2) and a small diameter cylindrical outer surface (70) which is continuously connected to the large diameter cylindrical outer surface (69) and has a smaller diameter than the large diameter cylindrical outer surface (69), and with which the inner elastically deformable flange portion (53) of said sealing member inner elastic (54) is in contact, the inner surface (48) of the cylindrical portion (17) of said lower housing (22) has a small diameter cylindrical inner surface (79) continuously connected to an annular inner surface (78 ) of the lower annular plate-like portion (15) of said lower casing (22), a large diameter cylindrical inner surface (80) having a larger diameter than the small diameter cylindrical inner surface (79) and connected continuously to the annular upper surface (20) of the cylindrical portion (17) of said lower casing (22), an intermediate cylindrical inner surface (81) having a larger diameter than the small diameter cylindrical inner surface (79) but having a diameter smaller than the large diameter cylindrical inner surface (80) and with which the outer elastically deformable flap portion (50) of said inner elastic sealing member (54) is in contact, a lower annular stepped surface (83) which is disposed between the small diameter cylindrical inner surface (79) and the intermediate cylindrical inner surface (81) and with which an annular lower surface (82) of said inner elastic sealing member (54) is in contact. o, and an upper annular stepped surface (84) disposed between the intermediate cylindrical inner surface (81) and the large diameter cylindrical inner surface (80), the annular lower end surface (85) of the inner cylindrical portion (8) of the said upper shell (12), which is continuously connected to the small diameter cylindrical outer surface (70) of the inner cylindrical portion (8) of said upper shell (12), is opposite to the lower annular stepped surface (83) of the portion. cylindrical (17) of said lower casing (22) with a gap (87) therebetween, and the cylindrical portion (31) of said thrust sliding bearing piece (33) is disposed between the large diameter cylindrical outer surface ( 69) of the outer surface (51) of the inner cylindrical portion (8) of said upper housing (12) and the large diameter cylindrical inner surface (80) of the inner surface (48) of the cylindrical portion (17) of said lower housing ( 22).
    [0002]
    2. Sliding thrust bearing made of synthetic resin (1), according to claim 1, CHARACTERIZED by the fact that the inner surface (44) of the outer cylindrical portion (5) of said upper casing (12) has an inner surface cylindrical which is continuously connected at an annular upper end thereof to the annular lower end of the truncated cone-shaped inner surface (65) and is continuously connected at an annular lower end thereof to the annular inner edge of the end surface annular lower (61) of the outer cylindrical portion (5) of said upper casing (12).
    [0003]
    3. Sliding thrust bearing made of synthetic resin (1), according to claim 1, CHARACTERIZED by the fact that the inner surface (44) of the outer cylindrical portion (5) of said upper casing (12) has a conical surface truncated upward (141) continuously connected to the annular lower end of the truncated cone-shaped inner surface (65) at a large diameter annular upper end thereof and having an annular lower end of small diameter smaller in diameter than the large diameter annular upper end, and a downwardly truncated conical surface (142) continuously connected to the small diameter annular lower end of the upwardly truncated conical surface (141) at a small diameter annular upper end thereof and which it has a large diameter annular lower end greater in diameter than the small diameter annular upper end.
    [0004]
    4. Sliding thrust bearing made of synthetic resin (1), according to any one of claims 1 to 3, CHARACTERIZED by the fact that each of said outer elastic sealing member (47) and said elastic sealing member The inner (54) includes an elastic sealing body (91, 95) having corresponding portions of the elastically deformable flap portions (43, 46, 50, 53) and a metal core (92, 96) incorporated in the elastic sealing body (91, 95).
    [0005]
    5. Sliding thrust bearing made of synthetic resin (1), according to any one of claims 1 to 4, CHARACTERIZED by the fact that said lower casing (22) has a plurality of projection portions (21) integrally formed in the annular upper surface (20) of the cylindrical portion (17) thereof and separated from each other in the direction around the geometric axis, and the annular plate-like portion (28) of said strut sliding bearing piece (33) has a plurality of recessed portions (112) or notches for receiving respective portions among the plurality of projecting portions (21) of said lower casing (22).
    [0006]
    6. Sliding thrust bearing made of synthetic resin (1), according to any one of claims 1 to 5, CHARACTERIZED by the fact that the annular lower surface (68) of said outer elastic sealing member (47) has at least an elastically deformable annular projection surface (93, 94).
    [0007]
    7. Sliding thrust bearing made of synthetic resin (1), according to any one of claims 1 to 6, CHARACTERIZED by the fact that the annular lower surface (82) of said inner elastic sealing member (54) has at least an elastically deformable annular projection surface (97, 98).
    [0008]
    8. Sliding thrust bearing made of synthetic resin (1), according to any one of claims 1 to 7, CHARACTERIZED by the fact that the external surface (41) of the cylindrical portion (17) of said lower casing (22) has a cylindrical outer surface (77) which radially protrudes continuously connected to the annular upper surface (20) of the cylindrical portion (17) at an annular upper edge and which has a larger diameter than the small diameter cylindrical outer surface (75) with which the inner elastically deformable flap portion (43) of said outer elastic sealing member (47) is in contact, while the small diameter cylindrical outer surface with which the inner elastically deformable flap portion (43) of the said outer elastic sealing member (47) is in contact, is disposed in the axial direction between the radially projecting cylindrical outer surface (77) and the annular stepped surface (76) with which the lower annular surface is air (68) of said outer elastic sealing member (47) is in contact.
    [0009]
    9. Sliding thrust bearing made of synthetic resin (1), according to any one of claims 1 to 8, CHARACTERIZED by the fact that the inner surface (48) of the cylindrical portion (17) of said lower casing (22) has an axially projecting annular stepped surface (86) which is continuously connected to the annular upper edge of the small diameter cylindrical inner surface (79) of the cylindrical portion (17) at an annular inner edge thereof and which is closest to an annular lower end surface (85) of the inner cylindrical portion (8) of said upper casing (12) in the axial direction than the lower annular stepped surface (83) with which the annular lower surface (82) of said housing member inner elastic seal (54) is in contact, while the lower annular stepped surface (83), with which the lower annular surface (82) of said inner elastic seal member (54) is in contact, is disposed in the radial direction between The annular stepped surface (86) projecting axially and the intermediate cylindrical inner surface (81).
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    同族专利:
    公开号 | 公开日
    BR112013019313A2|2020-12-08|
    RU2013138683A|2015-03-27|
    EP3385554A3|2018-11-14|
    CN103547822A|2014-01-29|
    CN103547822B|2016-03-30|
    JP5444270B2|2014-03-19|
    CN105221562A|2016-01-06|
    JP2012172814A|2012-09-10|
    RU2587301C1|2016-06-20|
    US9004769B2|2015-04-14|
    CA2825380A1|2012-08-30|
    WO2012114679A1|2012-08-30|
    RU2547333C1|2015-04-10|
    EP2679843A1|2014-01-01|
    CN105221562B|2018-09-14|
    EP2679843B1|2018-07-18|
    US20130322798A1|2013-12-05|
    US8708568B2|2014-04-29|
    EP3385554A2|2018-10-10|
    EP3385554B1|2021-03-24|
    EP2679843A4|2015-07-22|
    US20140199007A1|2014-07-17|
    CA2825380C|2015-04-21|
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    法律状态:
    2020-12-22| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2021-01-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-03-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-04-20| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 15/02/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011037682A|JP5444270B2|2011-02-23|2011-02-23|Thrust slide bearing made of synthetic resin|
    JP2011-037682|2011-02-23|
    PCT/JP2012/000980|WO2012114679A1|2011-02-23|2012-02-15|Synthetic resin thrust sliding bearing|
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