• 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 (10) for a tensioner roller or belt or chain winder comprises a pulley (12), a bearing (14), a spacer (18) supporting said bearing (14) and provided with a bore (50) therethrough, and a fixing screw (20) extending inside said bore (50) of the spacer (18). The device (10) further comprises at least one temporary locking means (62) for the fixing screw (20) relative to the spacer (18), said temporary locking means (62) being breakable and interposed between said screw (20) and the spacer (18).
    公开号:FR3037115A1
    申请号:FR1554988
    申请日:2015-06-02
    公开日:2016-12-09
    发明作者:Mickael Chollet；Alain Gezault；Torbjorn Hedman；Romuald Lescorail；Frederic Liege；Flavien Tesniere；Nicolas Tronquoy
    申请人:SKF AB；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the field of pulley devices for tensioner or retractor roller provided to cooperate with a chain or a belt, for example a motor vehicle internal combustion engine timing belt.
    [0002] Such rollers are generally used to permanently maintain a tension on the belt or chain in a specific range or to locally change the path taken by it. These are then called tensioning rollers or rollers. In the rollers, the pulley is rotatably mounted on a screw or a shaft via a bearing, the roller being then attached directly or indirectly to the engine block or to a member of a tensioner device, for example an articulated arm or an eccentric. The bearing is any mechanical device for implementing a pivot connection between the pulley and the screw or the axis, and may for this purpose be a rolling bearing or other ... To achieve the fixing of the roller on its support a spacer is generally used in association with said screw or shaft. During this assembly, it is desirable that the axis or the screw is axially integral with the other elements constituting the roller and comprising the pulley. This provides a set that can not be dismantled, easy to handle and transport, and can be mounted easily. For this purpose, document FR 2 954 437 discloses a pulley device for tensioner roller comprising a pulley, a bearing, a spacer supporting the bearing and a fixing screw immobilized axially with respect to the spacer. The relative axial retention of the fixing screw and the spacer is effected by means of a retaining ring provided to cooperate with a groove formed on the fixing screw.
    [0003] Among other disadvantages, this solution requires a particular design of the fixing screw. A relatively large clearance must also be made on the front surface of the spacer to allow mounting of the retaining ring. This considerably reduces the contact area between the spacer and its support. The present invention aims to overcome these disadvantages. More particularly, the present invention aims to provide a pulley device easy to manufacture, assemble and economic. For this purpose, it is proposed a pulley device for tensioner roller or belt or chain winder comprising a pulley, a bearing, a spacer supporting said bearing and provided with a through bore, and a fixing screw extending to inside said bore of the spacer. The device further comprises at least one temporary locking means of the fixing screw relative to the spacer, said temporary locking means being breakable and interposed between the screw and the spacer. By "breakable" is meant a locking means whose breaking can be caused by a mechanical action of the user, for example during assembly of the device. For example, the mechanical action can be manual, such as manually exerting a tightening torque on the fixing screw. Such a pulley device temporarily locks the fixing screw relative to the spacer, for example the transport time, until the final assembly of the device on an external support. In addition, it is possible to use standard design fastening screws which have no throat. In a preferred embodiment, said locking means is interposed radially between the screw and the bore of the spacer.
    [0004] In one embodiment, the temporary blocking means locally covers both the fastening screw and the spacer. In one embodiment, the temporary blocking means is fully mounted within a cavity extending from the through bore of the spacer.
    [0005] Advantageously, the cavity opens on a radial surface at an axial end of the spacer opposite a head of the screw. In one embodiment, the cavity is annular. In another embodiment, the cavity is discrete, that is to say that it extends within a given angular sector, for example between 20 ° and 60 °, and preferably between 35 ° and 45 °. Advantageously, the through bore of the spacer comprises a plurality of such cavities. The fixing screw may comprise a head and a rod.
    [0006] Advantageously, the rod of the fixing screw comprises at least one threaded portion, said temporary locking means being disposed axially on the opposite side to the head of the screw relative to the spacer. In one embodiment, the temporary blocking means is disposed radially between the bore of the spacer and the threaded portion of the screw. Advantageously, the locking means comprises a fixing point made of synthetic material. In one embodiment, it is possible to provide a plurality of temporary blocking means, for example three, spaced apart from one another in the circumferential direction. Preferably, the pulley comprises an outer axial portion and an inner axial portion fixed on an outer ring of the bearing. In another aspect, there is provided a method of assembling a pulley device for a tensioning roller or belt or belt winder, in which a subassembly comprising a pulley, a bearing, a spacer supporting said bearing is mounted. bearing and provided with a through bore, is introduced a fixing screw inside said bore of the spacer, and the position of the fixing screw 30 is maintained relative to the spacer by removing at least one means breakable, between the screw and the spacer. Other objects, features and advantages of the invention will become apparent on reading the following description, given solely by way of non-limiting example, and with reference to the appended drawings in which: FIG. 1 is a view In axial section of a pulley device according to a first embodiment of the invention, - Figure 2 is a detail view of Figure 1; - Figure 3 is a side view of the pulley device of the invention. Figure 1 is an axial sectional view of a pulley device according to a second embodiment of the invention, and Figure 5 is a side view of the pulley device of Figure 4. As can be seen in FIGS. 1 and 3, the pulley device for tensioner or belt or chain winder, referenced as a whole, comprises a pulley 12, a rolling bearing 14 with a geometric axis 16 , a spacer 18 of generally cylindrical shape and a fixing screw 20 coaxial with the axis 16. As will be described in more detail below, the device 10 comprises means provided for securing or temporary locking of the fixing screw 20 with respect to the spacer 18.
    [0007] Pulley 12 includes an outer axial portion 24 having an outer surface for engagement with a belt or chain (not shown), an inner axial portion 26 and a radial annular intermediate portion 28 connecting said portions. The outer 24 and inner 26 portions are coaxial with the axis 16. The stiffening ribs 29 are also provided between the inner and outer axial portions 26 and 26 and are connected to the intermediate portion 28. The rolling bearing 14 comprises a ring 30, an outer ring 32, a row of rolling elements 34, here made in the form of balls, arranged between the races of the rings, and a cage 36 ensuring the maintenance of the circumferential spacing of the rolling elements 34. The rolling bearing 14 also comprises on each side an annular seal 38, 40 fixed to the outer ring 30 to close the radial space 3037115 existing between the rings and inside which are housed the rolling elements 34 and the cage 36. In the exemplary embodiment illustrated, the inner and outer rings 30 and 32 are massive. The term "solid ring" means a ring whose shape is obtained by machining with chip removal (turning, grinding) from tubes, bars, forged blanks and / or rolled. The inner ring 30 has an axial outer surface 30a of revolution on which is formed the toroidal raceway for the rolling elements 34. The inner ring 30 also comprises a bore 30b fitted on the spacer 18 and two frontal radial surfaces 30c, 30d axially delimiting said bore and the outer surface. The outer ring 32 has a similar design. In the exemplary embodiment illustrated, the pulley 12 is obtained by overmolding on the outer ring 32 of a plastic material, such as a polyamide. This results in excellent cohesion between these parts. Alternatively, the pulley could be made of sheet metal and be fitted on the outer ring 32. In another variant, the pulley 12 and the outer ring 32 could be made in one piece. The spacer 18, with axis 16, comprises a cylindrical axial portion 42 on which is fitted the inner ring 30 of the rolling bearing 14, and which is extended, at one axial end, by a cylindrical axial portion 44 of more large diameter. An annular radial shoulder 46 is provided between the axial portions 42, 44 and forms an abutment surface against which the radial surface 30c of the inner ring 30 bears axially. Axially on the side opposite to the radial shoulder 46, the portion axial 44 is delimited by a radial front surface 48 adapted to bear against an external support (not shown) to the device for mounting and fixing the device on said support. The support may for example be the engine block, an articulated arm or an eccentric of the associated automatic tensioner roller. The axial portion 44 extends in axial projection relative to the pulley 12. Axially on the side 3037115 6 opposite to the radial front surface 48, the axial portion 42 is delimited by a radial front surface 49. The spacer 18 is delimited axially by the radial surfaces 48, 49 front. In this embodiment, the axial dimension of the axial portion 42 is very slightly less than that of the inner ring 30. In this way, the radial surface 49 is slightly axially offset with respect to the radial surface 30d of the inner ring 30. The spacer 18 thus leaves the radial surface 30d completely free so that it can be used as a reference surface and bear against any other surface. The spacer 42 has a cylindrical bore 50, of axis 16, within which the fixing screw 20 extends. The fixing screw 20 can be adjusted with a greater or lesser radial clearance in the bore 50. The bore 50 is through. The bore 50 extends axially from the radial surface 49 to the radial surface 48. As illustrated more clearly in FIG. 2, a cavity 52 is formed on the bore 50 of the spacer 18, opening onto the radial surface 48. The cavity 52 extends from the bore 50. The cavity 52 here extends radially outwardly from said bore. In this embodiment, the cavity 52 is a countersink, ie a flat-bottomed cylindrical bore, situated in the radial plane with respect to the axis 16. As can be seen in FIG. 2, the axial section of the cavity 52 is rectangular. Alternatively, the cavity 52 may have an axial section of other shapes, for example square.
    [0008] Referring again to FIG. 1, the fixing screw 20 comprises a clamping head 54 and a rod provided with a smooth portion 56 extending axially from the head and concentrating in the bore 50 , and a threaded portion 58 opposite said head. The threaded portion 58 of the screw is projecting axially from the radial surface 48 of the spacer 18. It is intended to be inserted into a threaded hole in the support outside the device. The device 10 also comprises a washer 60 disposed around the smooth portion 56, in contact with the head 54. The head 54 comes axially in abutment against the washer 60, the latter coming 3037115 7 axially bearing against the front radial surface 30d of the inner ring 30 left free by the spacer 18. As previously indicated, the device 10 comprises means for temporarily locking the fixing screw 20.
    [0009] In the exemplary embodiment illustrated, these means are made in the form of attachment points 62 interposed radially between the screw 20 and the bore 50 of the spacer. The fixing points 62 are mounted inside the cavity 52 of the spacer. As can be seen in FIG. 3, three attachment points 62 are provided here. The three attachment points 62 are spaced substantially 120 ° apart from each other in the circumferential direction. The attachment points are made of synthetic material, for example polyamide material, for example deposited by overmolding. Alternatively, the synthetic material may be glue or silicone. Each attachment point 62 is arranged to cover both the cavity 52 and the threaded portion 58 of the screw. The fixing points 62 are in the illustrated embodiment bearing against the bottom of the cavity 52. In a variant, it is possible to provide another arrangement of the attachment points inside the cavity 52. In FIGS. 1 to 3, the fastening points are shown schematically in spherical form. The attachment points 62 provide axial retention and circumferential retention of the securing screw relative to the spacer 18. By adjusting the amount of plastic deposited, a break level of the temporary screw lock can be set. 20 with respect to the spacer 18. In other words, in this embodiment, the number of fixing points 62 and the quantity of synthetic material deposited per fixing point 62 can advantageously be calculated so that the The action of tightening the screw 20 carried manually by a user causes the locking of the screw 20 to break with respect to the spacer 18. Consequently, this blocking is temporary and is effective only during the storage and transport of the pulley device 10.
    [0010] As can be seen in FIG. 3, each attachment point 62 extends along the cavity 52, within an angular sector p around the axis 16. In this embodiment, angle (3 is between 1 ° and 10 °, preferably between 1 ° and 5 °, and in particular substantially equal to 3 ° .This local application of the locking means reinforces the temporary nature of the latter. each temporary blocking means may be in the form of at least one continuous line of glue within the cavity 52, extending over a wider angular sector.
    [0011] In this embodiment, the device comprises three attachment points 62. However, it is not beyond the scope of the invention to apply a different number of attachment points 62, for example 1, 2, 4 or more. To assemble the pulley device 10, the procedure is as follows. First of all, a subassembly is made comprising the pulley 12, the rolling bearing 14 and the spacer 18. To do this, the pulley 12 is assembled with the outer ring 26 of the rolling bearing 14. the spacer 18 in the bore 30b of the inner ring 30 of the rolling bearing 14, until the shoulder 46 abuts against the radial front surface 30c. In a second step, the fixing screw 20 is introduced into the washer 60, then into the spacer 18 of the subassembly. In a third step, the attachment points 62 are formed by removing a material comprising glue and silicone. The amount of deposited material is sufficient for each attachment point 62 to contact the annular cavity 52 and the threaded portion 58 of the fastener screw. Alternatively, the attachment points 62 can be removed by overmolding a polyamide material inside the cavity 52. Local means for temporarily securing the fastening screw 20 with respect to the spacer 18 are obtained. These locking means provide a dual function of axial retention and circumferential retention of the screw 20. These locking means are breakable 3037115 9 to allow a temporary locking of the screw 20, for example limited to the storage and transport of the pulley device 10. By providing means for temporarily locking the fixing screw 20 with respect to the spacer 18, a better tightening of the fastening screw 20 in its holder is allowed. Indeed, during the tightening of the fixing screw 20, when the radial front surface 48 abuts against the outer support, the locking means cease to produce their effect. Since the attachment screw 20 is pivotable relative to the spacer 18, it is possible to tighten the spacer 18 more strongly. Furthermore, in the exemplary embodiment illustrated, the locking means 62 are recessed or flush with the mounting surface 48 of the spacer on its support. The absence of projecting elements with respect to the surface 48, apart from the fixing screw, makes it easier to position the pulley device against its support. However, in an alternative embodiment, it may be possible to provide temporary locking means provided between the fixing screw 20 and the front surface 48 of the spacer. In this case, the rupture of the locking means is carried out before the spacer 18 comes into contact with the associated support. In addition, the pulley device 10 has the advantage of not requiring a particular design of the fastening screw. The design of the blocking means further allows the realization of a cavity 52 of small size, which minimizes the loss of contact surface between the spacer 18 and the outer support. The second exemplary embodiment illustrated in FIGS. 4 and 5, in which the identical elements have the same references, differs from the first example described in that the annular cavity of the spacer is replaced by at least one cavity 70 extending to 30 the inside of an angular sector strictly less than 360 °, and in this particular example between 35 ° and 45 °. Each cavity 70 extends from the bore 50. Each cavity 70 here extends radially outwardly from said bore. Advantageously, there are as many cavities 70 as attachment points 62.
    [0012] Each attachment point 62 is disposed within a cavity 70 of its own. In this exemplary embodiment, three identical cavities 70 are provided on the spacer 18 and are spaced apart from one another in the circumferential direction, here in a regular manner. Such an embodiment is particularly advantageous in that the contact surface between the spacer and its support is greater. The invention has been illustrated on the basis of a pulley device comprising a rolling bearing provided with an inner ring, an outer ring and at least one row of rolling elements arranged between the rings. Alternatively, the bearing may be of the sliding type and consist of an annular body, for example made of thermoplastic material, and may comprise radial grooves capable of being filled with lubricant. In another variant, the sliding bearing may comprise two tracks or rings in direct sliding on one another. Finally, this solution provides a more economical and easier way to implement, further allowing attachment of the pulley device to its improved external support.
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Pulley device (10) for tensioner roller or belt or chain winder comprising a pulley (12), a bearing (14), a spacer (18) supporting said bearing (14) and provided with a bore (50) therethrough , and a fixing screw (20) extending inside said bore (50) of the spacer (18), characterized in that the device (10) further comprises at least one locking means (62) temporary fixing screw (20) relative to the spacer (18), said temporary locking means (62) being breakable and interposed between said screw (20) and the spacer (18).
    [0002]
    2. Device (10) according to claim 1, wherein said locking means (62) is interposed radially between said screw (20) and the bore (50) of the spacer (18).
    [0003]
    3. Device (10) according to claim 1 or 2, wherein said temporary locking means (62) covers locally both the fastening screw (20) and the spacer (18).
    [0004]
    The apparatus (10) according to any one of the preceding claims, wherein said temporary blocking means (62) is fully mounted within a cavity (52) extending from the bore (50). ) of the spacer (18).
    [0005]
    5. Device (10) according to claim 4, wherein the cavity opens on a radial surface (48) at an axial end of the spacer (18) opposite a head (54) of the screw (20) of attachment.
    [0006]
    6. Device (10) according to any one of claims 4 or 5, wherein the cavity (52) is annular.
    [0007]
    7. Device (10) according to any one of claims 4 or 5, wherein the cavity (52) extends within a given angular sector, for example between 20 ° and 60 °, and preferably between 35 ° and 45 °.
    [0008]
    8. Device (10) according to any one of the preceding claims, wherein the fastening screw (20) comprises a head (54) and a rod comprising at least one threaded portion (58), said locking means (FIG. 62) being disposed axially on the opposite side to the head (54) of the screw relative to the spacer.
    [0009]
    The device (10) according to claim 8, wherein said temporary locking means (62) is radially disposed between the bore (50) of the spacer (18) and the threaded portion (58) of the screw ( 20).
    [0010]
    10. Device (10) according to any one of the preceding claims, wherein said locking means comprises a fixing point (62) made of synthetic material. 10
    [0011]
    11. Device (10) according to any one of the preceding claims, comprising a plurality of temporary locking means (62) spaced relative to each other in the circumferential direction el.
    [0012]
    12. A method of assembling a pulley device (10) for a tensioning roller or belt or chain winder, in which a subassembly comprising a pulley (12), a bearing (14), a spacer is mounted. (18) supporting said bearing (14) and provided with a bore (50) therethrough, a fixing screw (20) is inserted into said bore (50) of the spacer (18), and the position of the fixing screw (20) relative to the spacer (18) by removing at least one breakable means (62) between the screw (20) and the spacer (18).
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3037115A1|2016-12-09|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    EP2217423A1|2010-08-18|Tensioning roller or winder device
    FR2932863A1|2009-12-25|PULLEY DEVICE FOR TENDER ROLLER OR ROLLER.
    FR2954437A1|2011-06-24|PULLEY DEVICE FOR TENDER ROLLER OR ROLLER.
    FR3035928A1|2016-11-11|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR2863188A1|2005-06-10|MANDREL
    FR3029586A1|2016-06-10|PULLEY DEVICE
    FR2989754A1|2013-10-25|WEAR COMPENSATION DEVICE FOR GEAR WITH TEMPORARY ANGULAR PRE - INDEXATION AND ASSOCIATED MOUNTING METHOD.
    FR3018887A1|2015-09-25|ROLLER OR ROLLER DEVICE
    FR3039863A1|2017-02-10|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR3018886A1|2015-09-25|ROLLER OR ROLLER DEVICE
    FR3080422A1|2019-10-25|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR2989755A1|2013-10-25|WEAR COMPENSATION DEVICE FOR GEAR AND ASSOCIATED MOUNTING METHOD.
    FR3039864A1|2017-02-10|METHOD OF MANUFACTURING A PULLEY DEVICE, PULLEY DEVICE ACCORDING TO SUCH A MANUFACTURING PROCESS AND MOTOR EQUIPPED WITH SUCH PULLEY
    FR3082908A1|2019-12-27|PULLEY DEVICE FOR TENSIONER OR ROLLER
    FR3008148A1|2015-01-09|BEARING BEARING DEVICE, IN PARTICULAR FOR STEERING COLUMN
    FR3078759A1|2019-09-13|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR3038020A1|2016-12-30|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR3007475A1|2014-12-26|CLUTCH SYSTEM FOR BEARING RING.
    FR3098875A1|2021-01-22|Pulley device
    FR2799515A1|2001-04-13|GAME RETRIEVAL SYSTEM FOR ATTACHING TWO PIECES TO EACH OTHER USING A SCREW TYPE FASTENER
    FR3038956A1|2017-01-20|PULLEY DEVICE FOR TENDER ROLLER OR ROLLER AND ASSOCIATED MOUNTING METHOD
    FR3099219A1|2021-01-29|Pulley device
    FR3020108A1|2015-10-23|ROLLER OR ROLLER DEVICE
    FR3038021A1|2016-12-30|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    同族专利:
    公开号 | 公开日
    US10132399B2|2018-11-20|
    CN106224474A|2016-12-14|
    FR3037115B1|2018-11-23|
    CN106224474B|2021-04-20|
    US20160356375A1|2016-12-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2010006857A1|2008-06-23|2010-01-21|Aktiebolaget Skf|Pulley device for tensioning idler or runner roller.|
    EP2339211A1|2009-12-23|2011-06-29|Aktiebolaget SKF|Pulley device for a tensioning or guide roller and corresponding mounting method|
    DE10043840A1|2000-09-06|2002-03-14|Schaeffler Waelzlager Ohg|Deflection roller for a traction drive|
    FR2889278B1|2005-07-27|2008-09-12|Skf Ab|ROLLER DEVICE FOR BELT|
    FR2992707B1|2012-06-29|2015-01-16|Skf Ab|TENSION ROLLER AND TENSIONER FOR BELT TRANSMISSION OF AN INTERNAL COMBUSTION ENGINE|
    FR3013093B1|2013-11-14|2015-12-11|Skf Ab|PULLEY DEVICE FOR CHAIN OR BELT AND MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE|
    FR3018887B1|2014-03-19|2016-03-11|Skf Ab|ROLLER OR ROLLER DEVICE|
    FR3035928B1|2015-05-04|2017-12-01|Skf Ab|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|
    FR3039863B1|2015-08-06|2018-03-02|Skf Ab|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|FR3023892B1|2014-07-17|2017-12-01|Skf Ab|PULLEY DEVICE FOR CHAIN OR BELT|
    FR3035928B1|2015-05-04|2017-12-01|Skf Ab|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|
    FR3039863B1|2015-08-06|2018-03-02|Skf Ab|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|
    DE102017223317A1|2017-12-20|2019-06-27|Aktiebolaget Skf|Pulley device, in particular for a tensioning roller or roller|
    FR3078758B1|2018-03-06|2020-04-03|Aktiebolaget Skf|PULLEY DEVICE FOR TENSIONER OR ROLLER|
    法律状态:
    2016-06-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-09| PLSC| Search report ready|Effective date: 20161209 |
    2017-06-29| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-29| PLFP| Fee payment|Year of fee payment: 4 |
    2020-06-26| PLFP| Fee payment|Year of fee payment: 6 |
    2021-06-25| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1554988|2015-06-02|
    FR1554988A|FR3037115B1|2015-06-02|2015-06-02|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|FR1554988A| FR3037115B1|2015-06-02|2015-06-02|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|
    US15/170,112| US10132399B2|2015-06-02|2016-06-01|Pulley device for tensioner roller or winding roller|
    CN201610555615.XA| CN106224474B|2015-06-02|2016-06-02|Pulley device for tension roller or winding roller|
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