• 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:
    The invention relates to a pulley device (1) for a tensioning or winding roller of a transmission element comprising a pulley (2) and a bearing (3). The bearing is provided with a rotating outer ring (6) surmounted by the pulley (2), a fixed inner ring (5), and at least one row of rolling elements (7, 8) arranged between the rings (5, 6). The inner ring (5) of the bearing (3) comprises at least one end portion projecting axially (33, 34) relative to the outer ring (6). The pulley (2) is provided with at least one pulley element (21, 22) having a C shape in axial section. A pulley element (21, 22) is provided with a lateral portion (35, 37) extending substantially radially to be in close proximity to an outer surface of said axially projecting end portion (33, 34). of the inner ring (5). The free end of this lateral portion (35, 37) is provided with a sealing means (41, 42) with at least one sealing lip coming into sliding contact with the outer surface of the end portion. axial projection (33, 34) of the inner ring (5).
    公开号:FR3080421A1
    申请号:FR1857830
    申请日:2018-08-31
    公开日:2019-10-25
    发明作者:Benoit Arnault；Mickael Chollet；Nicolas Tronquoy；Samuel Viault
    申请人:SKF AB；
    IPC主号:
    专利说明:

    Pulley device for tensioner roller or rewinder
    Technical field of the invention
    The present invention relates to the field of pulley devices for tensioner roller or rewinder provided to cooperate with a transmission element, for example a belt or a distribution or drive chain of the internal combustion engine of a motor vehicle.
    State of the art
    Such rollers are generally used to permanently maintain a tension on the transmission element within a determined range cu to mcdifier Iccalement the path taken by it. We speak respectively of tension rollers or of roller rollers. In the roller rollers, the pulley is rotated on a threaded ccrps screw by means of a bearing, the roller is then fixed directly or indirectly on the engine block or on an element of a tensioner roller device, for example an articulated arm or an eccentric.
    The bearing generally comprises a fixed inner ring with a bore through which the screw passes, a rotating outer ring surmounted by the pulley, and at least one row of rolling elements interposed between the rings.
    Such devices are often fitted with seals or even additional protective flanges, helping to protect the device against pollution or projections from the outside environment.
    Particles or other pollution elements can however infiltrate which can accumulate over time in the immediate vicinity of the bearing sealing means. As the sealing means can wear out, the risk of pollution infiltration into the bearing chamber increases with the duration of use of the pulley device. This internal pollution can result in accelerated deterioration of the internal components of the bearing, in particular the contact surfaces between the rolling elements and the rings. This can then result in a decrease in the quality of the rotary mechanical connection provided by the pulley device, and a reduced lifetime of its internal components. The risk of breakage, especially in operating mode, is also higher.
    Summary of the invention
    The present invention aims to remedy this drawback.
    More particularly, the present invention aims to provide a pulley device resistant under conditions of high pollution, particularly economical, easy and secure assembly, forming a non-removable sub-assembly, and reduced axial and radial dimensions.
    The invention relates to a pulley device for a tensioner roller or rewinder for a transmission element comprising a pulley and a bearing.
    The bearing is provided with a rotating outer ring having an outer surface, a bore with at least one outer race, a front side surface and a rear side surface. The bearing is also provided with a fixed inner ring with a bore capable of receiving a screw body, an outer surface with at least one inner raceway, a rear lateral surface intended to come to bear against a support of the device, and a front side surface against which a screw head can come to bear, the inner ring of the bearing comprising at least one end portion projecting axially relative to a side surface of the outer ring. Said rings are coaxial and form a radial space between them. The bearing is provided with at least one row of rolling elements arranged in said radial space and between the inner and outer tracks.
    The pulley is provided with at least one pulley element having a C shape in axial section and having an inner portion mounted on the outer surface of the outer ring of the bearing, an outer portion with an outer surface intended to cooperate with the transmission element, and an intermediate portion extending essentially radially between axial ends of the inner and outer portions along a first axial side, the pulley element being formed in one piece. At least one pulley element is also provided with a lateral portion extending essentially radially from an axial end of the inner portion axially opposite the intermediate portion, the free end of said lateral portion coming in close proximity to a surface. outside of said end portion projecting axially from the inner ring.
    According to the invention, the free end of the lateral portion of the pulley element is provided with a sealing means with at least one sealing lip coming into sliding contact with the external surface of the end portion projecting axially from the inner ring.
    According to other advantageous but not compulsory characteristics of the invention, taken individually or in combination:
    - The inner ring of the bearing is in one piece.
    The inner race of the bearing comprises a track element provided with an outer surface with at least one inner race track for the rolling elements, and a spacer provided with an outer surface mounted in a bore of the track element, the bore intended to receive the screw, a rear lateral surface intended to come to bear against a support of the device, and a front lateral surface against which a screw head is intended to come to bear.
    - The pulley device comprises retaining means intended to cooperate with the screw.
    - The bore of the fixed inner ring includes an inner circumferential groove in which is housed an annular rod cooperating with the screw.
    - A cage maintains the circumferential spacing of the rolling elements.
    - The rolling elements are balls.
    - The inner portion of the pulley element is tightly mounted on an outer surface of the outer ring of the bearing.
    - The lateral portion of a pulley element comes to bear axially against a lateral surface of the outer ring of the bearing.
    - The sealing means is made of polymer material.
    - The sealing means is molded onto the free end of the lateral portion of the pulley element.
    - Said end portion of the inner ring projects axially with respect to the lateral portion of the pulley element.
    - Said end portion is chamfered.
    - A washer is interposed between the front side surface of the inner ring and the head of the screw.
    - Said washer has an outside diameter strictly greater than the inside diameter of the free end of the lateral portion of the pulley element.
    - Said washer is formed in one piece with the head of the screw.
    - Said end portion is provided on its outer surface with a circumferential gutter.
    - The pulley comprises a single pulley element having a C-shape in axial section.
    - The pulley comprises two pulley elements having a C shape in an axial section.
    - The intermediate portions of the two pulley elements are in axial support.
    - The pulley element is made of metal, for example steel.
    - The pulley element is made of plastic, for example polyamide.
    Brief description of the drawing
    The present invention will be better understood on studying the detailed description of embodiments taken by way of non-limiting examples, and illustrated by the appended drawings in which:
    - Figure 1 is a rear perspective view of a pulley device according to a first embodiment of the invention;
    - Figure 2 is an axial sectional view of the pulley device of Figure 1;
    - Figure 3 is an axial sectional view of a pulley device according to a second embodiment of the invention; and
    - Figure 4 is an axial sectional view of a pulley device according to a third embodiment of the invention.
    detailed description
    As can be seen in Figures 1 and 2, a pulley device for a tensioner roller or belt winder, referenced 1 as a whole, is of geometric axis XI, and comprises a pulley 2 adapted to cooperate with a transmission element (not shown) such as a belt or chain, a bearing 3, and a screw 4.
    The bearing 3 comprises a fixed inner ring 5, a rotating outer ring 6, said rings 5, 6 being coaxial around the axis XI. The bearing 3 also comprises two rows of rolling elements 7 and 8, here produced in the form of balls, arranged between a radial space formed between the rings, and cages (not referenced) ensuring the maintenance of the circumferential spacing of the elements rollers 7 and 8, respectively.
    The inner 5 and outer 6 rings are concentric. In the illustrated embodiment, the rings are solid, that is to say obtained by machining or grinding with removal of material from metal tubes, bars, forgings or laminated blanks.
    The inner ring 5 comprises a bore 9, an outer surface 10 stepped and provided with rolling tracks (not referenced) having in axial section a concave internal profile and of toroidal shape suitable for the rolling elements 7, 8, and two rear side surfaces 11 and before 12.
    The outer ring 6 comprises a stepped cylindrical bore 13 and provided with rolling tracks (not referenced) having in axial section a concave internal profile and of toroidal shape suitable for the rolling elements 7, 8, an outer cylindrical surface 14 on which is mounted the pulley 2, and two rear side surfaces 15 and front 16.
    The fixed inner ring 5 extends axially out of the rotating outer ring 6 in a rear axial direction directed towards a support on which the pulley device 1 is intended to be mounted. The fixed inner ring 5 is thus provided with a rear protruding axial end portion 33, the rear lateral surface 11 of which is axially offset relative to the rear lateral surface 15 of the external ring 6. The rear lateral surface 11 is intended to form a bearing surface for the bearing 3 against the support of the device 1.
    The fixed inner ring 5 also extends axially out of the rotating outer ring 6 in a front axial direction directed away from the support on which the pulley device 1 is intended to be mounted. The fixed inner ring 5 is thus provided with a front projecting axial end portion 34 whose front side surface 12 is axially offset relative to the front side surface 16 of the outer ring 6. The front side surface 12 is intended to form a bearing surface for the screw 4.
    The bearing 3 advantageously comprises on each axial side an annular seal (not referenced) to close the radial space existing between the rings 5, 6 and inside which the rolling elements 7, 8 are housed.
    Alternatively, the bearing may include a different number of rows of rolling elements arranged between the outer and inner rings, for example a single row of rolling elements.
    Alternatively, the bearing may include other types of rolling elements, for example tapered rollers, needles, or even tapered rollers. Alternatively, the bearing can be a plain bearing.
    In this embodiment, the inner ring 5 is formed in one piece. According to an alternative embodiment not shown, the bearing 3 can comprise an annular spacer mounted in the inner ring 5.
    The screw 4 comprises a body 17 and a head 18 at an axial end of said body 17. The body 17 is housed in the bore 9 of the bearing 3, and extends axially beyond the rear lateral surface 11 of the ring fixed inner 6. The body 17 comprises a threaded portion intended to be screwed into a corresponding tapped opening of the support for the pulley device 1. The head 18 of the screw 4 has a relatively flat surface bearing against the front lateral surface 12 of the inner ring 5 of the bearing 3, axially opposite the support in which the body 17 is intended to be screwed.
    In the illustrated embodiment, the bore 9 of the inner ring 3 is provided with a circumferential groove 19 at its rear end. An annular ring 20, preferably elastic, is housed in said groove 19 and cooperates with the body 17 of the screw 4 in order to hold the screw 4 integral with the inner ring 5, and therefore with the pulley device 1.
    The pulley 2 comprises a rear pulley element 21, and a front pulley element 22.
    The rear pulley element 21 comprises an outer annular portion 23 with an outer cylindrical surface 24 able to cooperate with a transmission means, and a cylindrical bore (not referenced). The element 21 also includes an inner annular portion 25 with a cylindrical bore 26 mounted tightly on the outer cylindrical surface 14 of the rotating outer ring 6 of the bearing 3, and an outer cylindrical surface (not referenced). The outer annular portion 23 is tubular and is of larger diameter than the inner annular portion 25 also tubular, the outer annular portion 23 radially surrounding said inner annular portion 25. The outer annular portion 23 is also of axial dimension greater than the annular portion inner 25, said outer annular portion 23 projecting axially from the inner annular portion 25 on the rear axial side of the device 1.
    The rear pulley element 21 finally comprises an intermediate portion for connecting the inner 25 and outer annular portions 23. The intermediate portion 27 extends radially between the front axial ends of the inner 25 and outer 23 portions of the rear pulley element
    21.
    The rear pulley element 21 has a general C shape in axial section, defining an annular opening open on the rear axial side of the device 1 in the direction of the support on which the device 1 is intended to be mounted.
    The front pulley element 22 comprises an outer annular portion with an outer cylindrical surface 29 capable of cooperating with a transmission means, and a cylindrical bore (not referenced). The element 22 also includes an inner annular portion 30 with a cylindrical bore 31 mounted tightly on the outer cylindrical surface 14 of the rotating outer ring 6 of the bearing 3, and an outer cylindrical surface (not referenced). The outer annular portion 28 is tubular and is of larger diameter than the inner annular portion 30 also tubular, the outer annular portion 28 radially surrounding said inner annular portion 30. The outer annular portion 28 is also of axial dimension greater than the annular portion inner 30, said outer annular portion 28 projecting axially from the inner annular portion 30 on the front axial side of the device 1.
    The front pulley element 22 finally comprises an intermediate portion 32 for connecting the inner 30 and outer annular portions 28. The intermediate portion 32 extends radially between the rear axial ends of the inner 30 and outer 28 portions of the pulley element before 22
    The front pulley element 22 has a general C shape in axial section, defining an annular opening open on the front axial side of the device 1 in the direction opposite to the support on which the device 1 is intended to be mounted.
    The front and rear pulley elements 21 and 22 are mounted on the rotating outer ring 6 of the bearing 3 so that their intermediate portions 27 and 32, respectively, come to bear radially against one another. The pulley elements 21, 22 are mounted axially symmetrically. The outer cylindrical surfaces 24, 29 of the outer annular portions 23, 28 of the front pulley elements 21 and rear 22, respectively, form an associated surface for cooperation with a transmission element.
    Each of the rear pulley elements 21 and front 22 are advantageously in one piece, and are advantageously formed by cutting and stamping a metal sheet, for example steel.
    According to the invention, the rear pulley element 21 is provided with a rear lateral portion 35.
    The rear lateral portion 35 extends essentially radially from an axial end of the inner portion 25 axially opposite to the intermediate portion 27 of the rear pulley element 21. The rear lateral portion 35 comes to bear axially against the rear lateral surface 15 of the outer ring 6 of the bearing 3. The rear lateral portion 35 is provided with a free end which comes in close proximity to an outer surface of the rear axial protruding end portion 33 of the inner ring 5 in order to form a narrow radial passage 36.
    Similarly, and axially opposite the rear side portion 35, the front pulley member 22 is provided with a front side portion 37. The rear side portion 37 extends essentially radially from an axial end of the inner portion 30 axially opposite to the intermediate portion 32 of the front pulley element 22. The front side portion 37 comes to bear axially against the front side surface 16 of the outer ring 6 of the bearing 3. The front side portion 37 is provided of a free end which comes in close proximity to an external surface of the end portion projecting from the axial front 34 of the inner ring 5 so as to form a narrow radial passage 38.
    In a particularly advantageous manner, the end portion projecting from the front axial portion 34 of the inner ring 5 is projecting axially from the front side portion 37 of the front pulley element 22. In addition, the end portion front axial projection 34 is chamfered to form an additional barrier against the intrusion of pollution and water. Alternatively not shown, the outer surface of the front axial protruding end portion 34 can be provided with a circumferential gutter in order to form a barrier but also a collector for pollution and water. Such means can also be provided on the rear face of the inner ring 5.
    Alternatively not shown, only one of the front pulley elements 21 or rear 22 can be provided with a lateral portion.
    Figure 3 illustrates a second embodiment of the invention, in which the same elements have the same references.
    In this mode, an annular washer 39 is axially interposed between the front lateral surface 12 of the inner ring and the head 18 of the screw 4. The washer 39 has a central bore in which the body 17 of the screw 18 is housed.
    The front lateral surface 12 is provided with the front axial protruding end portion 34 of the inner ring 5. Thus the washer 39 is axially offset relative to the front lateral portion 37 of the front pulley element
    22.
    In a particularly advantageous manner, the outside diameter of the washer 39 is strictly greater than the inside diameter of the free end of the front side portion 37.
    The washer 39 advantageously forms an additional barrier to prevent the intrusion of pollution or water by the narrow front passage 38 between the front lateral portion 37 of the front pulley element 22 and the inner ring 5.
    In addition, an axial narrow passage 40 can advantageously be formed between the washer 39 and the lateral portion 37. The succession of the axial narrow passage 40 and the radial radial passage 38 forms a labyrinthine seal for the device 1.
    In the embodiment illustrated in Figure 3, the washer 39 and the head 18 of the screw 4 are separate elements. Alternatively not shown, the washer and the screw head are formed in one piece.
    A third embodiment of the invention is illustrated in Figure 4, in which the same elements have the same references.
    The free end of the rear lateral portion 35 of the rear pulley element 21 is provided with a sealing means 41 with a lip coming into sliding contact against the external surface of the rear axial protruding end portion 33 .
    Similarly, the free end of the front lateral portion 37 of the front pulley element 22 is provided with a sealing means 42 with a lip coming into sliding contact against the external surface of the end portion in front axial projection 34.
    Advantageously, the sealing means 41, 42 are made of polymeric material. The sealing means 41, 42 are preferably overmolded on the free ends of the rear side portions 35 and front 37, respectively.
    With such an embodiment, it is possible to overcome the internal sealing means of the bearing when the application conditions allow it.
    The embodiments of the invention have been illustrated with a pulley in two parts. Alternatively, the pulley device can be provided with a single pulley element having a C shape. In this case, only a single lateral portion on an axial side of the device is provided.
    In addition, the technical characteristics of the various embodiments can be, in whole and only for some of them, combined with each other. Thus, the pulley device can be adapted in terms of costs, performance and simplicity of implementation.
    权利要求:
    Claims (7)
    [1" id="c-fr-0001]
    claims
    1. Pulley device (1) for tensioner roller or rewinder for a transmission element comprising:
    - a bearing (3) provided with:
    a rotating outer ring (6) having an outer surface (14), a bore (13) with at least one outer raceway, a front side surface (16) and a rear side surface (15), of a fixed inner ring (5) with a bore (9) capable of receiving a body (17) of screws (4), an outer surface (10) with at least one inner raceway, a rear lateral surface (11) intended to come bearing against a support for the device, and a front lateral surface (12) against which the head (18) of screws (4) can come to bear, the inner ring (5) of the bearing (3) comprising at least one portion of end axially projecting (33, 34) relative to a lateral surface (15, 16) of the outer ring (6), said rings (5, 6) being coaxial and forming a radial space between them, and at least at least one row of rolling elements (7, 8) arranged in said radial space and between the inner and outer raceways had; and
    - a pulley (2) provided with at least one pulley element (21, 22) having a C shape in an axial section and having:
    an inner portion (25, 30) mounted on the outer surface (14) of the outer ring (6) of the bearing (3), an outer portion (23, 28) with an outer surface (24, 29) intended to cooperate with the transmission element, and an intermediate portion (27, 32) extending essentially radially between axial ends of the inner (25, 30) and outer (23, 28) portions along a first axial side, the pulley element (21, 22) being formed in one piece, at least one pulley element (21, 22) also being provided with a lateral portion (35, 37) extending essentially radially from an axial end of the interior portion (25, 30 ) axially opposite the intermediate portion (27, 32), the free end of said lateral portion (35, 37) coming in close proximity to an outer surface of said end portion projecting axially (33, 34) from the inner ring (5);
    characterized in that the free end of the lateral portion (35, 37) of the pulley element (21, 22) is provided with a sealing means (41, 42) with at least one sealing lip coming into sliding contact with the outer surface of the axially projecting end portion (33, 34) of the inner ring (5).
    [2" id="c-fr-0002]
    2. Pulley device according to claim 1, in which the lateral portion (35, 37) of a pulley element (21, 22) bears axially against a lateral surface (15, 16) of the outer ring (6 ) of the bearing (3).
    [3" id="c-fr-0003]
    3. Pulley device according to any one of the preceding claims, in which said end portion (33, 34) of the inner ring (5) projects axially with respect to the lateral portion (35, 37) of the 'pulley element (21, 22).
    [4" id="c-fr-0004]
    4. Pulley device according to any one of the preceding claims, in which said end portion (33, 34) of the inner ring (5) is chamfered.
    [5" id="c-fr-0005]
    5. Pulley device according to any one of the preceding claims, in which a washer (39) is interposed between the front lateral surface (12) of the inner ring (5) and the head (18) of the screw (4) .
    [6" id="c-fr-0006]
    6. Pulley device according to claim 5, wherein said washer (39) is of outside diameter strictly greater than the inside diameter of the free end of the lateral portion (37) of the pulley element (22).
    [7" id="c-fr-0007]
    7. Pulley device according to any one of the preceding claims, characterized in that the pulley (2) comprises two pulley elements (21, 22) having a C shape in axial section, the intermediate portions (27, 32) of the two pulley elements (21, 22) being in axial support.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR2923281A1|2009-05-08|ROLLER OR ROLLER DEVICE
    FR2932863A1|2009-12-25|PULLEY DEVICE FOR TENDER ROLLER OR ROLLER.
    FR2889278A1|2007-02-02|Belt roller e.g. drive roller/tensioner roller, device for distribution or driving accessory of motor vehicle, has retaining portion, head of screw and end-plates housed in space defined radially and axially by contour of pulley
    EP1061278A1|2000-12-20|Fastening device for a roller and roller comprising such a device
    FR3035928A1|2016-11-11|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR2954437A1|2011-06-24|PULLEY DEVICE FOR TENDER ROLLER OR ROLLER.
    FR2882116A1|2006-08-18|BEARING BEARING COMPRISING A FILTRATION CAGE
    FR2729440A1|1996-07-19|ROLLING BEARING, IN PARTICULAR REAR BEARING OF A MOTOR VEHICLE ALTERNATOR
    FR3015597A1|2015-06-26|FOLLOWING ROLL DEVICE OF A CAM
    FR3080421A1|2019-10-25|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR3037115A1|2016-12-09|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR2920851A1|2009-03-13|Automatic tensioning roller device for e.g. distributor belt of internal combustion engine for motor vehicle, has lower unit with sealing unit that is arranged in radial direction between holding unit and contact surface
    EP1277978A1|2003-01-22|Conical roller bearing with a sealing device
    FR3060504A1|2018-06-22|AXLE BOX FOR BOGIE OF RAILWAY VEHICLE AND BOGIE OF RAILWAY EQUIPPED WITH SUCH BOX OF AXLE
    FR3027645A1|2016-04-29|PULLEY DEVICE FOR CHAIN OR BELT AND MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE
    FR2971825A1|2012-08-24|Rolling bearing for use in clutch release bearing device arranged on diaphragm of clutch of motor vehicle, has metallic rigid stop portions cooperating by contact with rolling elements to limit angular tilting of movable outer ring
    FR3039863A1|2017-02-10|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR3075302A1|2019-06-21|PULLEY DEVICE, PARTICULARLY FOR TENDER ROLLER OR GUIDE WHEEL
    FR3082908A1|2019-12-27|PULLEY DEVICE FOR TENSIONER OR ROLLER
    FR3086027A1|2020-03-20|PULLEY DEVICE FOR TENSIONER OR ROLLER
    FR3090060A1|2020-06-19|Pulley device
    FR2858031A1|2005-01-28|FREE WHEEL DEVICE, PULLEY AND ALTERNATOR EQUIPPED WITH FREE WHEEL
    FR3078759A1|2019-09-13|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR3079585A1|2019-10-04|Pulley device for tensioner roller or roller
    FR3079582A1|2019-10-04|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    同族专利:
    公开号 | 公开日
    US20220074480A1|2022-03-10|
    FR3080422A1|2019-10-25|
    FR3080421B1|2020-03-27|
    US20220074481A1|2022-03-10|
    US20190323594A1|2019-10-24|
    DE102019204981A1|2019-10-24|
    FR3080422B1|2020-04-03|
    CN110388426A|2019-10-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2491182A1|1980-09-27|1982-04-02|Skf Kugellagerfabriken Gmbh|GALET, IN PARTICULAR TENDERER, FOR BELT OR SIMILAR CONTROLS|
    US4610645A|1984-03-09|1986-09-09|Riv-Skf Officine Di Villar Perosa S.P.A.|Belt stretcher unit designed for assembly on a flexible drive particularly on a motor vehicle|
    GB2165615A|1984-10-11|1986-04-16|Skf Gmbh|A pulley assembly|
    CN203272722U|2013-05-06|2013-11-06|东风汽车公司|Dustproof and waterproof assembly for idle wheel|
    FR3020108A1|2014-04-17|2015-10-23|Skf Ab|ROLLER OR ROLLER DEVICE|
    DE102019201754A1|2019-02-11|2020-08-13|Aktiebolaget Skf|Pulley device especially for a tension pulley or a pulley|
    DE102019201752A1|2019-02-11|2020-08-13|Aktiebolaget Skf|Pulley device especially for a tension pulley or a pulley|
    法律状态:
    2019-04-30| PLFP| Fee payment|Year of fee payment: 2 |
    2019-10-25| PLSC| Publication of the preliminary search report|Effective date: 20191025 |
    2020-04-29| PLFP| Fee payment|Year of fee payment: 3 |
    2021-04-27| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1853425A|FR3080422B1|2018-04-19|2018-04-19|PULLEY DEVICE FOR TENSIONER OR ROLLER|
    FR1853425|2018-04-19|
    FR1857830A|FR3080421B1|2018-04-19|2018-08-31|PULLEY DEVICE FOR TENSIONER OR ROLLER|FR1857830A| FR3080421B1|2018-04-19|2018-08-31|PULLEY DEVICE FOR TENSIONER OR ROLLER|
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