• 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 belt roller device (1) comprises a pulley (3), a bearing (5) including an outer ring (50) on which the pulley (3) is mounted, and an inner ring (52) into which is inserted a fixing screw (7) comprising a head (70) and a thread (72). The device further comprises a flange (9) retaining the screw (7) in the inner ring (52), characterized in that the retaining flange (9) comprises a cylindrical part inside which the head (9) 70) of the screw (7) is inserted, and an annular portion (92) extending inwardly to an intermediate portion (74) of the screw (7) between the head (70) and the thread (72) and whose diameter (D74) is smaller than the diameter (D72) of the thread (72). The diameter (D96) of an inner edge of the annular portion (92) of the retaining flange (9) is smaller than the diameter (D72) of the thread (72).
    公开号:FR3025276A1
    申请号:FR1458098
    申请日:2014-08-29
    公开日:2016-03-04
    发明作者:Nicolas Tronquoy；Torbjorn Hedman；Romuald Lescorail
    申请人:SKF AB；
    IPC主号:
    专利说明:

    [0001] The invention relates to a belt roller device. The belt roller devices generally comprise a pulley and a bearing comprising an outer ring and an inner ring, in which is inserted a screw for fixing the device, for example on a motor. The screw is generally immobilized in the inner race of the bearing by a retaining flange, as known from US Pat. No. 6,241,257, to prevent the loss of the screw during transportation of the device before it is mounted.
    [0002] In this document, the screw is held by a radial portion of the flange which is supported on a radial surface of the screw, whose outer diameter is greater than the outer diameter of the thread of the screw. As a result, the screw can be removed by axial sliding on the side of the retaining flange and out of the inner ring. It is to this disadvantage that the invention intends to remedy by proposing a new belt roller device, the structure of which makes it possible to retain the screw in the inner ring of the bearing more reliably than the known devices of the prior art. . To this end, the invention relates to a belt roller device comprising a pulley, a bearing including an outer ring on which the pulley is mounted, and an inner ring, in which is inserted a fixing screw comprising a head and a thread. , the device further comprising a retaining flange of the screw in the inner ring. This device is characterized in that the retaining flange comprises a cylindrical portion, within which the head of the screw is inserted, and an annular portion extending inwardly to an intermediate portion of the screw. located between the head and the thread and whose diameter is smaller than the diameter of the thread, and in that the diameter of an inner edge of the annular portion of the flange is less than the diameter of the thread. Thanks to the invention, the radial portion of the retaining flange prevents the screw from being completely out of the inner ring of the bearing, by blocking the screw in each direction of axial displacement.
    [0003] According to advantageous but non-mandatory aspects of the invention, such a belt roller device may incorporate one or more of the following features, taken in any technically permissible combination: - The cylindrical portion of the retaining flange comprises tabs adapted to deform against the intermediate part of the screw. The retaining flange includes a web extending radially outwardly toward the pulley to form a labyrinth seal. - The cylindrical portion of the retaining flange comprises, on its outer surface, radial bosses adapted to exert a contact force against an inner surface of the inner ring. - The bosses are regularly distributed over the circumference of the cylindrical portion of the retaining flange. - The bosses are formed by deformations of the cylindrical portion of the retaining flange. The intermediate zone of the screw is formed by a groove separating the head of the screw from the thread. - The intermediate zone of the screw is formed by a cylindrical portion whose length, along a longitudinal axis of the screw, is at least equal to the length of the head of the screw along said longitudinal axis. - At the interface between the intermediate portion and a portion of the screw whose diameter is equal to the thread diameter, the screw comprises a shoulder adapted to oppose axially to the annular portion of the retaining flange. - The bearing is a ball bearing.
    [0004] The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of a belt roller device, made by way of non-limiting example with reference to the accompanying drawings. , in which: - Figure 1 is a section of a belt roller device according to the invention; Figure 2 is an enlarged view of detail II in Figure 2; FIG. 3 is a perspective view of a retaining flange of the device of FIGS. 1 and 2. A belt roller device 1 is shown in FIG. 1. This device comprises a pulley 3, a bearing 5, a screw 7 and a retaining flange 9 of the screw 7 relative to the bearing 5. The fixing screw 7 is intended to allow the attachment of the device 1, for example on an internal combustion engine not shown. The device 1 defines a central axis X-X '. In what follows, the adjectives "axial" and "radial" are used with reference to the axis X-X '. The bearing 5 comprises an outer ring 50 on which the pulley 3 is mounted. The bearing 5 also comprises an inner ring 52, in which the fixing screw 7 is inserted. The flange 9 keeps the screw 7 in the inner ring 52, so that the screw 7 is not lost during the transport of the device 1 before fixing. Between the inner ring 52 and the outer ring 50 are interposed rolling elements, which are balls 54 in this example. The flange 9 is secured to the inner ring 52, which comprises for this purpose a housing formed by a radial surface 520 and an axial surface 522. The flange 9 has a cylindrical portion 90 with a circular base centered about a central axis XX The flange 9 also comprises an annular portion 92 which bears against the axial surface 522, which is flat and perpendicular to the axis X-X '.
    [0005] The cylindrical part 90 bears against the radial surface 520 by means of bosses 94 formed on the outer surface 90A of the cylindrical part 90. The bosses 94 exert a contact force against the radial surface 520, which makes it possible to ensure the locking in rotation and in translation of the retaining plate 9 relative to the inner ring 52, along the axis X-X '. The bosses 94 are preferably evenly distributed around the circumference of the cylindrical portion 90. As can be seen in FIG. 2, the bosses 94 may be formed by localized deformations of the cylindrical portion 90 outwardly. Alternatively not shown, the bosses 94 may be formed by the areas of greater thickness of the cylindrical portion 90.
    [0006] The screw 7 comprises a head 70 and a thread 72. The head 70 is inserted inside the cylindrical portion 90 of the flange 9. When the head 70 is pushed into contact with the annular portion 92, the screw 7 is retracted. in the inner race 52 and substantially does not protrude from a side edge 30 of the pulley 3. In order to maintain the screw 7 inserted in the inner race 52, the annular portion 92 extends inwardly towards the XX 'axis to an intermediate portion 74 of the screw 7 located between the head 70 and the thread 72. The diameter D74 of the intermediate portion 74 is smaller than the diameter D72 of the thread 72, which corresponds to the inside diameter of a tapping 524 of the inner ring 52, wherein the thread 72 is inserted. In the present description, the diameter D72 is defined as the maximum outer diameter of the threads of the thread 72. The annular portion 92 has an inner edge 96 whose diameter D96 is smaller than the diameter D72 of the thread 72. The edge 96 therefore radially exceeds Inwardly of the tapping 524. Optionally and as shown in Figure 1, the screw 7 comprises a non-threaded portion 76 whose outer diameter is equal to the outer diameter D72. At the interface between the unthreaded portion 76 and the intermediate portion 74, a shoulder 78, 3025276 4 oriented toward the head 70, prevents the exit of the screw 7 because this shoulder 78 is blocked axially by the inner edge 96 of the flange 9 in case of movement of the screw 7 along the axis XX 'of the side of the head 70, in the direction of the arrow F1. For some applications, the screw 7, when retracted into the inner ring 52, must be partially removable from the inner ring 52 remaining attached to the inner ring 52, so that it can be manipulated by an operator. The freedom of axial movement of the screw 7 must allow the screw 7 to run axially enough to be retracted. For this purpose, the intermediate portion 74 has a length L74, taken along the axis X-X ', at least equal to the length L70 of the head 70, taken 10 along the same axis. This allows the sliding of the screw 7 along the X-X 'axis between a retracted position shown in Figures 1 and 2, and an extended position in which the head 70 can be grasped by an operator. According to an optional aspect of the invention visible only in FIG. 3, the inner edge 96 of the flange 9 is formed by tabs 98 adapted to deform against the intermediate portion 74. This allows the annular portion 92 to exert a slight effort resilient on the screw 7, to exert a resistance against the axial sliding of the screw 7. This resistance must be sufficient to prevent unexpected or inadvertent release of the screw 7 of the inner ring 52, and be low enough to allow an operator to remove the screw 7 without excessive effort. Here the inner edge 96 is formed by the joining of the free edges of the tabs 98. According to a not shown embodiment of the invention, the edge 96 of the radial portion 12 may be continuous and circular. According to an optional aspect of the invention, the retaining flange 9 comprises a web 100 extending radially outwards of the device, towards the pulley 3.
    [0007] The web 100 extends in the vicinity of an inner portion 32 of the pulley 100 and forms a labyrinth seal to reduce the entry of particles into the interior of the device 1. According to a not shown embodiment of the invention, According to the invention, the intermediate portion 74 of the screw 7 may be formed by a groove separating the head from the screw of the thread, this groove having an inside diameter substantially equal to the inside diameter of the inner edge 96 of the flange 9. In such a case, the possibility of sliding along the axis XX 'of the screw 7 is limited. According to another embodiment not shown of the invention, the bearing 5 may comprise rolling elements different from the balls 54, such as for example rollers or needles.
    [0008] The features of the embodiments and variants described above may be combined to form new embodiments of the invention. 5
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Belt pulley device (1) comprising a pulley (3), a bearing (5) including an outer ring (50) on which the pulley (3) is mounted, and an inner ring (52), in which is inserted a fixing screw (7) comprising a head (70) and a thread (72), the device further comprising a screw retaining flange (9) in the inner ring (52), characterized in that the retaining flange (9) comprises a cylindrical portion (90) within which the head (70) of the screw (7) is inserted, and an annular portion (92) extending inward to an intermediate portion (74) of the screw (7) between the head (70) and the thread (72) and whose diameter (D74) is smaller than the diameter (D72) of the thread (72), and that the diameter (D96) of an inner edge (96) of the annular portion (92) of the retaining flange (9) is smaller than the diameter (D72) of the thread (72).
    [0002]
    2. Device according to claim 1, characterized in that the annular portion (92) of the retaining flange (9) comprises tabs (98) adapted to deform against the intermediate portion (74) of the screw (7).
    [0003]
    3. Device according to one of the preceding claims, characterized in that the retaining flange (9) comprises a web (100) extending radially outwardly towards the pulley (3), so as to form a labyrinth seal.
    [0004]
    4. Device according to one of the preceding claims, characterized in that the cylindrical portion (90) of the retaining flange (9) comprises, on its outer surface (90a), bosses (94) radial adapted to exert a force of contact against an inner surface (520) of the inner ring (52).
    [0005]
    5. Device according to claim 4, characterized in that the bosses (94) are regularly distributed over the circumference of the cylindrical portion (90).
    [0006]
    6. Device according to one of claims 4 and 5, characterized in that the bosses (94) are formed by deformations of the cylindrical portion (90). 3025276 7
    [0007]
    7. Device according to one of the preceding claims, characterized in that the intermediate zone (74) of the screw (7) is formed by a groove separating the head (70) of the screw (7) of the thread (72). 5
    [0008]
    8. Device according to one of claims 1 to 6, characterized in that the intermediate zone (74) of the screw (7) is formed by a cylindrical portion whose length (L74) along a longitudinal axis (X-X ') of the screw (7), is at least equal to the length (L70) of the head (70) of the screw (7) along this longitudinal axis (X-X').
    [0009]
    9. Device according to claim 8, characterized in that at the interface between the intermediate portion (74) and a portion (76) of the screw (70) whose diameter is equal to the diameter (D72) of the thread (72). ), the screw (7) comprises a shoulder (78) adapted to oppose axially to the annular portion (92) of the retaining flange (9).
    [0010]
    10. Device according to one of the preceding claims, characterized in that the bearing (5) is a ball bearing (54).
    类似技术:
    公开号 | 公开日 | 专利标题
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    EP3173326B1|2019-03-27|Blade-root bearing and manufacturing method, system, oscillating system and rotary system including such a bearing
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    FR3078759A1|2019-09-13|PULLEY DEVICE FOR TILT ROLLER OR ROLLER
    FR2977502A1|2013-01-11|WHEEL DEVICE FOR ROLLER BOARD OR SKATE
    FR2951790A1|2011-04-29|Axial lock washer for locking idle pinion on gear box shaft of automobile, has two semi rings supported together by hooping body, and locking ends of semi ring provided with pins that are arranged on circumferential part of semi ring
    FR3086027A1|2020-03-20|PULLEY DEVICE FOR TENSIONER OR ROLLER
    同族专利:
    公开号 | 公开日
    FR3025276B1|2017-11-24|
    BR102015019932A2|2016-04-05|
    CN105387065A|2016-03-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE10333673A1|2003-07-24|2005-02-17|Ina-Schaeffler Kg|Tension pulley for belt used in engine of vehicle, comprising sealing cap securing components of pulley unit|
    FR2889278A1|2005-07-27|2007-02-02|Skf Ab|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|
    WO2007085333A1|2006-01-25|2007-08-02|Schaeffler Kg|Splash guard disc for a deflection pulley|
    DE102007049906A1|2007-10-18|2009-04-23|Schaeffler Kg|Belt disk or roller, for a motor belt drive, has a strip or other material to take off electrostatic charges from the fixed or rotating parts|
    DE102011077019A1|2011-06-07|2012-12-13|Schaeffler Technologies AG & Co. KG|Belt pulley for belt drive of internal combustion engine, comprises running disk guiding belt, roller bearing with outer ring fastened in running disk and inner ring, retaining ring, and fastening screw that passes through retaining ring|FR3078759A1|2018-03-06|2019-09-13|Aktiebolaget Skf|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|
    FR3078758A1|2018-03-06|2019-09-13|Aktiebolaget Skf|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|
    FR3079586A1|2018-04-03|2019-10-04|Aktiebolaget Skf|PULLEY DEVICE FOR TILT ROLLER OR ROLLER|JPS5145548U|1974-10-01|1976-04-03|
    DE29720776U1|1997-11-22|1998-01-15|Skf Gmbh|Fastening device for belt rolls|
    DE10036765A1|2000-07-28|2002-02-07|Schaeffler Waelzlager Ohg|Diverting roller for traction drive has pot-like insertion part in inner ring of roller bearing for transporting lock|
    DE10043840A1|2000-09-06|2002-03-14|Schaeffler Waelzlager Ohg|Deflection roller for a traction drive|
    DE10338530A1|2003-08-19|2005-03-17|Ina-Schaeffler Kg|seal|
    DE102008051648A1|2008-09-18|2010-03-25|Schaeffler Kg|Tensioning roller or guide roller has spacer, which is made of plastic or is designed as reinforced plastic component, where spacer includes reinforcement made from aluminum or steel|FR3079583B1|2018-04-03|2020-03-06|Aktiebolaget Skf|PULLEY DEVICE FOR TENSIONER OR ROLLER|
    法律状态:
    2015-08-31| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-04| PLSC| Publication of the preliminary search report|Effective date: 20160304 |
    2016-08-25| PLFP| Fee payment|Year of fee payment: 3 |
    2017-08-28| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1458098A|FR3025276B1|2014-08-29|2014-08-29|BELT ROLLER DEVICE|FR1458098A| FR3025276B1|2014-08-29|2014-08-29|BELT ROLLER DEVICE|
    BR102015019932A| BR102015019932A2|2014-08-29|2015-08-19|belt roller device|
    CN201510542632.5A| CN105387065A|2014-08-29|2015-08-28|Conveyor belt roller device|
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