• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This pulley device (2) for chain or belt comprises two bearings (20A, 20B) each having an inner ring (22A, 22B), an outer ring (24A, 24B) movable in rotation with respect to the inner ring around a common central axis (X2), a row of rolling elements (26A, 26B) mounted in a rolling chamber (28A, 28B) defined between the inner ring and the outer ring. A pulley (10) is integral in rotation with the outer rings (24A, 24B) of the two bearings and provided with an outer radial surface (12) engaging with a chain or belt. This device also comprises means (16, 50) of axial load (E, R), parallel to the common central axis (X2), outer rings (24A, 24B) towards each other or one to the opposite of the other. These axial load-bearing means comprise an axial abutment (16) formed on the pulley and adapted to receive a first outer ring (24A) in abutment, as well as an elastic member (60) for bearing on the second outer ring (24B). in the direction of the axial stop (16).
    公开号:FR3036151A1
    申请号:FR1654277
    申请日:2016-05-13
    公开日:2016-11-18
    发明作者:Benoit Arnault
    申请人:SKF AB；
    IPC主号:
    专利说明:

    [0001] The invention relates to a pulley device as used, in particular, in motor vehicles. Such a device may relate to tensioning rollers for tensioning a chain or a belt for transmitting motion, accessory rollers, retractors, idle pulleys and any other means for supporting and transmitting rotation. In this type of device, it is known, for example from FR-A-2 706 726, to use two rows of balls which cooperate with two rings made of metal plates for supporting a pulley. It is also known from FR-A-2 970 755 and FR-A2 971 028 to use two rows of balls cooperating with thin-walled rings made by stamping sheet metal, within a belt tensioning roller device. or a crazy pulley device.
    [0002] With this type of equipment, and in order to avoid premature wear of the rolling elements, it is necessary to match the balls and the rings or to use the rigid rings, that is to say massive and, by way of consequently, relatively expensive. It is these drawbacks that the invention intends to remedy more particularly by proposing a new pulley device of economical manufacture and which has satisfactory mechanical properties, including in the case where these inner and outer rings are relatively thin. For this purpose, the invention relates to a pulley device for a chain or belt, this device comprising two bearings each having an inner ring, an outer ring movable in rotation relative to the inner ring about a common central axis, as well as a row of rolling elements mounted in a rolling chamber defined between the inner ring and an outer ring. This device also comprises a pulley integral in rotation with the outer rings of the two bearings and provided with an outer radial surface engaging with a chain or a belt, as well as axial load means, parallel to the common central axis, outer rings one towards the other or one opposite the other. According to the invention, the axial load means comprise an axial abutment formed on the pulley and adapted to receive in abutment a first outer ring, among the outer rings of the two bearings, and an elastic bearing member on the second ring. direction of the axial stop of the pulley.
    [0003] Thanks to the invention, the axial load exerted on the outer rings makes it possible to make up the production sets, which may in particular result from the low rigidity of the inner and outer rings, but also from other factors related to the other components of the device. pulley, in particular to the phenomena of dilatation.
    [0004] For the purposes of the present invention, the word "axial" refers to the common central axis of the device which constitutes a relative axis of rotation between the inner and outer rings. A direction or a force is axial when it is parallel to this axis and radial when it is perpendicular to and sequential with this axis. A surface is axial when it is perpendicular to an axial and radial direction when it is perpendicular to a radial direction. According to advantageous but non-obligatory aspects of the invention, such a pulley device may incorporate one or more of the following features, taken in any technically permissible combination: - The bearings are angular contact, with converging contact directions 15 closer to the common central axis, while an axial load force tends to bring the outer rings of one another. - The inner and outer rings of the bearings are formed by strips of pressed sheet metal. - The pulley device comprises an axial locking member of the elastic member 20 relative to the pulley. - The elastic support member is an elastically deformable corrugated washer, bearing against a side surface of the second outer ring, while the axial locking element is a circlip engaged in an internal radial groove of the pulley. The pulley device further comprises a spacer for transmitting an axial load force between the inner rings of the two bearings. - The pulley device comprises a mounting screw on a support, this screw being housed radially inside the inner rings, while the spacer is provided and configured to undergo an axial compressive force resulting from the assembly of the pulley device on the support, this force having the effort to lock the inner rings in rotation relative to the spacer. - The spacer is provided with a conduit for passage of a power cable of a sensor. - Each ring comprises a contact track with the rolling elements and a flat annular portion perpendicular to the common central axis, while an axial load force is applied between the annular planar portions of the two outer rings.
    [0005] The invention also relates to a motor vehicle equipped with a pulley device as mentioned above and a chain or belt bearing on the outer radial surface of the pulley of this device. The invention will be better understood and other advantages thereof will become more apparent in light of the following description of an embodiment of a pulley device and a motor vehicle in accordance with its principle. , given purely by way of example and with reference to the accompanying drawings in which: - Figure 1 is an axial section of a pulley device according to the invention, in place on a support belonging to a motor vehicle according to FIG. 2 is a half-section on a larger scale corresponding to the upper part of FIG. 1, in which only the pulley device is shown and the screw which it comprises is omitted, and Figure 3 is a perspective view of an elastic washer used in the pulley device of Figures 1 and 2.
    [0006] The pulley device 2 shown in FIGS. 1 to 3 is an idler pulley intended to be mounted on an engine block 4, which is equipped with a tapping 6 for receiving a screw 8 belonging to the pulley device 2. The block motor 4 belongs to a motor vehicle which it represents in FIG. 1. The pulley device 2 comprises a pulley 10 which rotates freely about a central axis X2 and of which the external radial surface on which the a belt 14 shown in phantom, only in Figure 1. Alternatively, the pulley 10 can receive, on its outer radial surface 14, a chain. The pulley 10 is rotatably supported about the X2 axis by two ball bearings 20A and 20B which are identical. The bearing 20A comprises a non-rotating inner ring 22A, a rotating outer ring 24A and a row of balls 26A disposed in a rolling chamber 28A formed radially between the rings 22A and 24A. A cage 29A made of synthetic material keeps the balls 26a in position inside the rolling chamber 28A, in a manner known per se.
    [0007] The rings 22A and 22B are normally mounted tight in the bore of the pulley 10. This clamping is necessary to prevent the pressed outer rings 22A and 22B from rotating in their housing. This phenomenon is called "rolling". In general, the adjustment of the connection between the parts 10, 22A and 22B with clamping remains necessary even if the rings 22A and 22B are tightened laterally.
    [0008] The rings 22A and 24A are made by stamping sheet metal strips whose thickness is between 0.3 and 10 mm. In the case of large bearings, this thickness may be equal to 50 mm or 100 mm. The ring 22A includes a portion 222A which defines a raceway for the balls 26A, and a portion 224A which is planar, annular and perpendicular to the axis X2. In the same way, the ring 24A comprises a rolling track 242A and a flat portion 244A, annular and perpendicular to the axis X2. The rings 22A and 24A are each one-piece. A seal 27A is disposed between the rings 22A and 24A on the bearing side 20B and includes a frame 272A and an elastomeric body 274A. AA is a straight line passing through the centers of the raceways 222A and 242A and by the center of the balls 26A, in the plane of Figure 2. This line AA is inclined by approximately 45 ° with respect to the axis X2. P2 is a radial plane to the axis X2 and passing between the bearings 20A and 20B.
    [0009] The line AA approaches the plane P2 at the same time as it approaches the axis X2. In the same way, the bearing 20B comprises a non-rotating inner ring 22B, a rotating outer ring 24B, balls 26B, a rolling chamber 28B, a cage 29B and a seal 27B. The rings 22A and 22B each break down into a portion 222B or 224B forming a raceway and a flat portion 224B or 244B, annular and perpendicular to the axis X2. A line AB is defined passing through the respective centers of the running tracks 222B and 242B and by the center of the balls 26B in the plane of FIG. 2. The line AB is symmetrical with the line AA with respect to the plane P2. The lines AA and AB converge towards each other as they approach the X2 axis. Thus, the two bearings 20A and 20B are angularly contactable and may be considered to have an "X" configuration with respect to the orientation of the contact surfaces between the balls 26A and 26B and the adjacent rings. The bearings 20A and 20B are of the "bearing-bearing" or "clutch bearing unit" type, as used sometimes in the clutch / clutch stops of motor vehicles, known from FR-A-2 992 383.
    [0010] The pulley device 2 also includes a spacer 30 disposed axially along the axis X2 between the portions 224A and 224B of the inner rings 22A and 22B. This spacer 30 is made of metal. It is produced by machining, stamping, sintering or forging. Alternatively, the spacer 30 may be made of plastic material and, in this case, it may be obtained by molding.
    [0011] The device 2 also comprises two generally disk-shaped plates 40A and 40B, each provided with a central orifice for the passage of the screw 8. The plate 40A is disposed on the side of the bearing 20A and intended to receive head 82 of the screw 8. The plate 40B is disposed on the side of the bearing 20B and 5 is intended to bear against a boss 4 'which is part of the engine block 4 and at the center of which is formed the tapping 6. The plates 40A and 40B are identical and each provided with an internal radial groove 42. An O-ring 44 is disposed in the groove 42 of the plate 40B and bears against the thread 84 of the screw 8. The pulley 10 is provided the side of the bearing 20A, a side wall and annular 16 which extends in the direction of the axis X2 and against which bears the portion 244A of the ring 24A. Furthermore, the pulley 10 is provided with an internal peripheral groove 18 in which is housed a circlip 50. A resiliently deformable corrugated washer 60, sometimes referred to as a "plane spring 15", is disposed along the axis X 2, between circlip 50 and part 244B. The elastically deformable washer surrounds the plate 40B and the screw 8 in the mounted configuration of the pulley device 2. In this configuration, the washer 60 exerts on the ring 24B an axial elastic force E directed towards the wall 16. This force E is transmitted by the ring 24B to the balls 26B and, given the orientation of the line AB, to the ring 24A. This force E is then transmitted, by the portion 224B of the ring 24B, to the spacer 30. The spacer 30 transmits this force E to the portion 224A of the ring 22A, which transmits it to the balls 26A and, through them and along the line AA, to the ring 24A which transmits it to the wall 16. In FIG. 2, the arrows E represent the elastic force exerted by the corrugated washer 60 on the two bearings 20B and 20A, until at the level of the wall 16. Insofar as the axial position of the pulley 10 relative to the washer 60 is fixed by the circlip 50 received in the groove 18, the wall 16 exerts a reaction force R also shown in this figure , this force having an intensity equal to that of the force E and a direction opposite to this force at the interface between the parts 24A and 30. Thus, the elastic force E exerted by the washer 60 results in a axial load of the outer rings 24A and 24B towards each other, to the combination of efforts E and R, which has the effect of catching the mounting and manufacturing games within the bearings 20A and 20B and between the parts 10 and 30. Note in Figure 2 that the plates 40A and 40B are not in axial contact with the spacer 30 but they pinch the parts 224A and 224B against the outer radial web 32 of this spacer. Indeed, the tightening of the screw 8 in the tapping 6 has the effect that the head 82 pushes the plate 40A to the boss 4 'against which the plate 40B is supported. The plates 40A and 40B then undergo an axial load E 'represented only in FIG. 1, this force having a tendency to bring the plates 40A and 40B closer together by pinching the parts 224A and 224B against the veil 32 of the spacer 30. The spacer 30 is thus compressed by the force E 'between the plates 40A and 40B. Thus, the inner rings 22A and 22B are immobilized relative to the non-rotating part of the device 2 which comprises the screw 8 the spacer 30 and the plates 40A and 40B.
    [0012] The axial length L30 of the spacer 30 is chosen such that the inner rings 22A and 22B are separated by a non-zero distance d22, this distance being measured, parallel to the axis X2, between the portions 222A and 222B. This avoids compressing the rings 22A and 22B against one another. However, alternatively, the rings 22A and 22B may be in axial contact.
    [0013] It will be seen in FIG. 2 that the edges of the portions 224A and 224B facing the X2 axis are not in contact with the plates 40A and 40B. Alternatively, the rings 22A and 22B are tightly mounted on the plates 40A and 40B. According to a not shown variant of the invention, the two rings 22A and 22B can be made by a single folded sheet metal strip. In this case, the geometry of the spacer 30 is adapted. In place of the corrugated washer or flat spring 60, it is possible to use a washer made of elastomeric material or an elastic member crimped onto the pulley 10. In this case, it is not essential to use the circlip 50. According to one aspect of the invention shown only in Figure 2, the spacer 30 is provided with a conduit 34 which opens on its outer radial surface 36 and which allows the passage of a cable 72 for supplying a temperature sensor 70. This sensor is positioned in the vicinity of the plane P2, between the inner rings 22A and 22B and the surface 36. It detects the temperature in the vicinity of the rings. In this case, the plate 40B is equipped with a conduit 46 for the passage of the cable 72 and a corresponding orifice, not shown, is provided in the boss 4 '. In practice, since the plates 40A and 40B are identical, a duct 46 is provided in each of these plates, this duct not being visible in the plate 40A in FIG. 2, given the angular orientation of this plate around the X2 axis. The rings 24A and 24B are each provided with a shoulder 246A, respectively 246B, on the outer surface of their portion 244A or 244B. For the ring 3036151 7 24A, this shoulder is not really used. For the ring 24B, this shoulder makes it possible to center the corrugated washer 60 with respect to the axis X2, by defining a volume V60 of partial reception of this washer. According to a not shown variant of the invention, the washer 60 can be centered in the bore of the pulley 10 thus eliminating the presence of the shoulders 246A and 246B of the ring 24A and 24B. The fact that the parts 24B and 60 are not in contact in the representation of Figure 2 is from the corrugated character of the washer 60. In the plane of Figure 2, a corrugation of the washer 60 is in contact with the circlip 50 and at axial distance from the ring 24B. In another radial plane, it is the opposite: the corrugation is in contact with the ring 24B and away from the circlip 50. In place of the balls 26A and 26B, other rolling elements can be arranged between the rings. internal and external bearings 20A and 20B, including rollers or needles.
    [0014] The invention is described above in the context of its implementation for an idler pulley. However, it is applicable with other pulley devices, including a tensioner roller, an accessory roller, a chain tensioner or belt. The embodiment and variants envisaged above can be combined with one another to generate new embodiments of the invention. 20
    权利要求:
    Claims (10)
    [0001]
    1. pulley device (2) for chain or belt (14), this device comprising two bearings (20A, 20B) each having - an inner ring (22A, 22B), an outer ring (24A, 24B) movable in rotation relative to the inner ring about a common central axis (X2), a row of rolling elements (26A, 26B) mounted in a rolling chamber (28A, 28B) defined between the inner ring and the outer ring, a pulley (10) integral in rotation with the outer rings (24A, 24B) of the two bearings and provided with an external radial surface (12) engaging with a chain or belt (14) means (16, 50) of axial load (E, R), parallel to the common central axis (X2), outer rings (24A, 24B) towards each other or opposite to each other, characterized in that the axial load means comprise: an axial abutment (16) provided on the pulley (10) and able to receive a first outer ring (24A) in abutment s outer rings (24A, 24B) of the two bearings (20A, 20B) an elastic member (60) bearing on the second ring (24B), among the outer rings of the two bearings, in the direction of the axial stop of the pulley .
    [0002]
    2.- Device according to claim 1, characterized in that the bearings (20A, 20B) are in oblique contact, with directions of contact (LA, AB) converging towards the common central axis (X2) and in an axial load force (E, R) tends to bring the outer rings (24A, 24B) closer to each other.
    [0003]
    3.- Device according to one of the preceding claims, characterized in that the inner rings (22A, 22B) and outer (24A, 24B) of the bearings (20A, 20B) are formed by stamped sheet metal strips. 3036151 9
    [0004]
    4.- Device according to one of the preceding claims, characterized in that it further comprises an element (50) for axially locking the elastic member (60) relative to the pulley (10). 5
    [0005]
    5.- Device according to claim 4, characterized in that the elastic support member is a corrugated washer (60) elastically deformable, bearing against a side surface of the second outer ring (24B), the locking element axial is a circlip (50) engaged in an inner radial groove (18) of the pulley (10).
    [0006]
    6.- Device according to one of the preceding claims, characterized in that it further comprises a spacer (30) for transmitting an axial load force (E ') between the inner rings (22A, 22B). two bearings (22A, 22B). 15
    [0007]
    7.- Device according to claim 6, characterized in that it further comprises a screw (8) for mounting on a support (4), this screw being housed radially inside the inner rings (22A, 22B) and in that the spacer (30) is provided and configured to undergo an axial compressive force (E ') resulting from the mounting of the pulley device (2) on the support, this force having the effect of blocking the internal rings ( 22A, 22B) in rotation relative to the spacer.
    [0008]
    8.- Device according to one of claims 6 or 7, characterized in that the spacer (30) is provided with a conduit (34) for passage of a cable (72) for supply 25 of a sensor (70).
    [0009]
    9.- Device according to one of the preceding claims, characterized in that each ring (224A, 224B, 244A, 244B) comprises a track (222A, 222B, 242A, 242B) of contact with the rolling elements (26A, 26B). and a planar annular portion (224A, 224B, 244A, 244B), perpendicular to the common central axis (X2), and in that an axial load force (E, R) is applied between the planar annular portions (244A). 244B) of the two outer rings (24A, 24B). 3036151 10
    [0010]
    10. A motor vehicle equipped with a pulley device (2) according to one of the preceding claims and a chain or belt (14) bearing on an outer radial surface of the pulley (12) of this device. 5
    类似技术:
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    FR3098875A1|2021-01-22|Pulley device
    同族专利:
    公开号 | 公开日
    CN105546094A|2016-05-04|
    FR3036151B1|2019-06-21|
    US20160116050A1|2016-04-28|
    JP2016084939A|2016-05-19|
    FR3027645B1|2018-03-02|
    FR3027645A1|2016-04-29|
    DE102015220708A1|2016-04-28|
    BR102015026860A2|2016-05-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE867777C|1944-08-05|1953-02-19|Star Kugelhalter Ges M B H Deu|Process for the production of cooperating inner and outer rings for encapsulated annular groove bearings|
    US4925322A|1988-03-03|1990-05-15|Viv Engineering Inc.|Ball bearing|
    DE102011003251A1|2011-01-27|2012-08-02|Zf Lenksysteme Gmbh|storage unit|
    DE102013107418A1|2012-07-13|2014-10-23|Aktiebolaget Skf|Mechanical system with one-way clutch and generator comprising such a system|
    FR2706726B1|1993-06-09|1995-08-04|Sagem|Power distribution bus-bar for component support, this component support and distribution bars for connecting the bus-bar and the support.|
    FR2970755B1|2011-01-24|2015-09-11|Skf Ab|BELT TENSION ROLLER DEVICE AND ASSOCIATED ASSEMBLY METHOD|
    FR2971028B1|2011-02-02|2014-01-17|Skf Ab|BEARING BEARING FOR BELT DEVICE BELT TENSIONER|
    FR2992383B1|2012-06-25|2015-12-11|Skf Ab|CLUTCH STOPPING DEVICE|US9863520B2|2015-11-18|2018-01-09|Borgwarner Inc.|Fan drive hub assembly with modular input shaft assembly|
    DE102016216713A1|2016-09-05|2018-03-08|Schaeffler Technologies AG & Co. KG|Deep-drawn bearing rings for tensioning and / or deflection roller|
    US10132356B2|2017-02-22|2018-11-20|Mijo Radocaj|Washer with step|
    DE102018200783A1|2018-01-18|2019-07-18|Aktiebolaget Skf|Ball bearing, clutch pressure bearing device with such a bearing, and drive train system with such a device|
    法律状态:
    2016-10-27| PLFP| Fee payment|Year of fee payment: 3 |
    2017-02-10| PLSC| Publication of the preliminary search report|Effective date: 20170210 |
    2017-10-31| PLFP| Fee payment|Year of fee payment: 4 |
    2018-10-30| PLFP| Fee payment|Year of fee payment: 5 |
    2019-10-29| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-27| PLFP| Fee payment|Year of fee payment: 7 |
    2021-10-27| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1460265|2014-10-24|
    FR1460265A|FR3027645B1|2014-10-24|2014-10-24|PULLEY DEVICE FOR CHAIN OR BELT AND MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE|
    FR1654277A|FR3036151B1|2014-10-24|2016-05-13|PULLEY DEVICE FOR CHAIN OR BELT AND MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE|FR1654277A| FR3036151B1|2014-10-24|2016-05-13|PULLEY DEVICE FOR CHAIN OR BELT AND MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE|
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