JP2007085398A - One-way clutch built-in type pulley device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a one-way clutch built-in type pulley device which improves durability and a life span of the one-way clutch by increasing a grease enclosing volume, and prevents a moving amount of a roller from being blocked even if a grease enclosing volume inside the one-way clutch is increased. <P>SOLUTION: The one-way clutch built-in type pulley device comprises: a sleeve 11; a pulley 12 concentrically arranged with the sleeve 11 in the circumference with the sleeve 11; a one-way clutch 13 arranged between the sleeve 11 and the pulley 12; and a pair of support bearings 14a, 14b arranged in both sides of the one-way clutch 13 between the sleeve 11 and the pulley 12. A grease trap G is provided between balls 17, 17 of a pair of support bearings 14a, 14b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pulley apparatus with a built-in one-way clutch, and in particular, as an auxiliary machine for an automobile, such as a starter, an alternator, a crank pulley, a compressor, an auxiliary machine driven by a motor at the time of engine idle stop, or an engine start. The present invention relates to a pulley device with a built-in one-way clutch to be used.

  For example, in the recent alternators, high performance and high output have been advanced, and high rotation, high load, high temperature, vibration, etc. have become severe, and various types of belts have been produced with high engine output. The conditions are even more severe. In addition, minute angular velocity fluctuations of the engine or the like cause belt flapping and belt squeal. For this reason, the current situation is that demand for pulley devices with a built-in one-way clutch that solves the problem of improving belt life and noise is increasing in the market (see, for example, Patent Document 1).

  As shown in FIG. 20, for example, a pulley device 100 with a built-in one-way clutch incorporated in an alternator described in Patent Document 1 is applied with a drive belt (endless belt) B from a drive pulley fixed to an engine crankshaft. A driven pulley 101 is provided, and a sleeve 102 is fixed to the rotating shaft of the alternator. A one-way clutch 103 and a pair of support bearings 104 are disposed between the driven pulley 101 and the sleeve 102.

  The one-way clutch 103 is fitted on a clutch outer ring 105 fitted on the inner circumferential surface of the intermediate intermediate portion of the driven pulley 101 and an outer circumferential surface of the intermediate middle portion of the sleeve 102, and a cam surface (see FIG. (Not shown), and a plurality of rollers 107 rotatably disposed in a wedge space between the inner peripheral surface of the clutch outer ring 105 and the cam surface of the clutch inner ring 106. The one-way clutch 103 includes a clutch cage 108 having a plurality of pockets for individually accommodating the rollers 107, and a spring 109 that is supported by the clutch cage 108 and elastically presses the rollers 107 in the locking direction. It has.

  When the rotational angular speed of the driven pulley 101 is higher than the rotational angular speed of the rotating shaft of the alternator, the driven pulley 101 and the sleeve 102 become relatively unrotatable (locked) by the wedge action of the roller 107 of the one-way clutch 103. Thus, the rotational force of the engine is transmitted to the rotating shaft of the alternator. On the other hand, when the rotational angular speed of the driven pulley 101 is slower than the rotational angular speed of the rotating shaft of the alternator, such as a speed fluctuation or a minute angular speed fluctuation, the driven pulley 101 and the sleeve 102 can freely rotate (overrun state). Therefore, even when the rotational angular velocity of the crankshaft fluctuates, the endless belt B and the driven pulley 101 are prevented from rubbing due to the action of the one-way clutch 103, and the life of the endless belt B due to generation of abnormal noise called squeal and wear. While preventing a fall, it can prevent that the power generation efficiency of an alternator falls.

Grease lubrication is often used for lubrication of the one-way clutch 103, and the grease is filled in the clutch space excluding the clutch cage 108, the spring 109, and the rollers 107.
Japanese Patent Laid-Open No. 2001-208100

  By the way, in the one-way clutch using the above-described grease lubrication, when the grease deteriorates and the lubricity is deteriorated, wear of the clutch engagement surface rapidly proceeds, and the pulley device may reach the endurance life. For this reason, to improve the durability of the pulley device, it is effective to improve the grease life, and it is desirable to increase the amount of grease enclosed in the clutch space as much as possible in order to ensure the grease life. However, if too much grease is enclosed in the space, the grease may hinder the movement of the rollers when the one-way clutch shifts from engagement to idling or from idling to engagement, resulting in poor engagement or idling. It can happen.

  The present invention has been made in view of the circumstances as described above, and its purpose is to prevent the movement of the rollers from being hindered even if the amount of grease enclosed in the one-way clutch is increased. The object is to provide a pulley device with a built-in one-way clutch capable of improving the durable life of the one-way clutch.

The above object of the present invention can be achieved by the following constitution.
(1) Sleeve and
A pulley arranged concentrically with the sleeve around the sleeve;
A one-way clutch that is disposed between the sleeve and the pulley and includes a clutch outer ring, a clutch inner ring, a plurality of engagement elements disposed between the clutch outer and inner ring, and a clutch retainer that holds the engagement elements; ,
A pair of support bearings disposed on both sides of the one-way clutch between the sleeve and the pulley, and having an outer ring, an inner ring, and a plurality of rolling elements disposed between the outer and inner rings;
A one-way clutch built-in pulley device comprising:
A pulley apparatus with a built-in one-way clutch, wherein a grease reservoir is provided between the rolling elements of a pair of support bearings.
In addition, the clutch outer ring | wheel of this invention includes the case where it forms with a pulley, The case where a clutch inner ring | wheel is also formed with a sleeve is included.

  According to the present invention, since a grease reservoir is provided between the rolling elements of the pair of support bearings, the movement of the rollers can be prevented from being inhibited even if the amount of grease enclosed in the one-way clutch is increased. The amount can be increased to improve the durable life of the one-way clutch.

  Hereinafter, a pulley apparatus with a built-in one-way clutch according to each embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 (a) is a cross-sectional view for explaining the one-way clutch built-in type pulley device for alternator of the first embodiment as a one-way clutch built-in type pulley device of the present invention, and FIG. It is the partial longitudinal cross-sectional view along the AO line of (a), FIG.1 (c) is the partial longitudinal cross-sectional view along the B-O line of (a).

  As shown in FIG. 1, a pulley apparatus 10 with a built-in one-way clutch according to the first embodiment is for driving an auxiliary machine such as an alternator, and has a sleeve 11 in which a rotation shaft (not shown) is fitted. Around the sleeve 11, a pulley 12 having a belt groove 12 a formed on the outer peripheral surface is disposed concentrically with the sleeve 11. A one-way clutch 13 is arranged between the outer peripheral surface of the sleeve 11 and the inner peripheral surface of the pulley 12 in the axially intermediate portion of the annular space formed therebetween. For example, a pair of support bearings 14a and 14b such as deep groove ball bearings are disposed at both ends so as to sandwich the one-way clutch 13. In addition, the shape of the belt groove 12a can be designed in an arbitrary shape such as a V groove, a poly V groove, or a tooth groove. Further, the outer peripheral surface of the sleeve 11 is formed with a step, and the outer peripheral surface of the sleeve 11 has an axial middle portion as a large diameter portion 11a and both axial end portions as small diameter portions 11b.

  The one-way clutch 13 transmits the rotational force from the pulley 12 to the sleeve 11 only when the pulley 12 tends to rotate relative to the sleeve 11 in a predetermined direction. Further, the pair of support bearings 14 a and 14 b enables relative rotation between the sleeve 11 and the pulley 12 while supporting a radial load applied to the pulley 12.

  Each of the support bearings 14a and 14b includes an inner ring 15 that is externally fitted to the outer peripheral surface of the small diameter portion 11b of the sleeve 11, an outer ring 16 that is internally fitted to the inner peripheral surface of the pulley 12, and both raceway surfaces of the inner ring 15 and the outer ring 16. A plurality of balls 17 which are rolling elements arranged between them and a retainer 18 which holds the balls 17 so as to roll freely. Further, the support bearings 14a and 14b have seal members 19 that are arranged on both sides in the axial direction and prevent entry of foreign matter from the outside and leakage of lubricant such as grease from the inside.

  The one-way clutch 13 includes a clutch outer ring 20 that is press-fitted and fixed to the inner peripheral surface of the pulley 12, a clutch inner ring 21 that is press-fitted and fixed to the outer peripheral surface of the large-diameter portion 11 a of the sleeve 11, a clutch outer ring 20, and a clutch inner ring 21. And a plurality of rollers 22 which are engaging members arranged rotatably. The outer peripheral surface of the clutch inner ring 21 forms a cam surface in which a plurality of ramp surfaces 21a are provided at predetermined intervals in the circumferential direction. The rollers 22 are rotatably held in a wedge space composed of each ramp surface 21 a and a cylindrical surface 20 a formed on the inner peripheral surface of the clutch outer ring 20.

  The one-way clutch 13 includes a clutch holder 23 having a plurality of pockets for individually accommodating the rollers 22 and a spring 24 that elastically presses the rollers 22 in the locking direction. In addition, the spring 24 is clamped by the center pillar part 23c and the both-ends pillar part 23d provided on the bridge part 23b which connects a pair of annular part 23a of the clutch holder | retainer 23 (refer FIG. 4).

  In the pulley device 10 with a built-in one-way clutch configured as described above, when the rotational angular speed of the pulley 12 is faster than the rotational angular speed of the rotating shaft of the alternator, for example, the roller 22 of the one-way clutch 13 is engaged by the wedge action. Engaged between the ramp surface 21a of the inner ring 21 and the cylindrical surface 20a of the clutch outer ring 20, the pulley 12 and the sleeve 11 become non-rotatable (locked), and the engine torque is transmitted to the rotating shaft of the alternator. Is done. On the other hand, when the rotational angular velocity of the pulley 12 is slower than the rotational angular velocity of the alternator, the engagement of the rollers 22 is released, and the relative rotation between the pulley 12 and the sleeve 11 becomes free (overrun state).

  Here, in the pulley apparatus with a built-in one-way clutch of the present invention, a grease reservoir G is provided between the balls 17 and 17 of the pair of support bearings 14a and 14b in the axial direction. Specifically, as shown in FIGS. 1B and 2, the inner peripheral surface of the clutch outer ring 20 is on the axially outer side of the cylindrical surface 20 a formed at the axially intermediate portion, that is, the cylindrical surface 20 a and the shaft. A pair of annular grooves 20c are formed between the pair of flange portions 20b formed at both ends in the direction. As shown in FIGS. 1B and 3, the outer circumferential surface of the clutch inner ring 21 overlaps the groove portion 20 c in the axial direction on the axially outer side of the ramp surface 21 a formed at the axially intermediate portion. A pair of annular grooves 21b are formed at the positions. Further, as shown in FIGS. 1C and 4, the clutch retainer 23 has an inner peripheral surface of the bridge portion 23 b at the axial position where both end pillar portions 23 d are formed, that is, a groove portion 21 b of the clutch inner ring 21. A pair of groove portions 23e extending in the circumferential direction are formed on the inner peripheral surface of the bridge portion 23b that faces each other. Further, as shown in FIGS. 1B and 5, a pair of rollers 22 having a smaller diameter than the transfer surface 22 a are provided at both ends of the roller 22 that overlaps the groove 20 c of the clutch outer ring 20 and the groove 21 b of the clutch inner ring 21 in the axial direction. The reduced diameter portion 22b is formed over the circumferential direction.

  Therefore, the grease reservoir G of the present embodiment includes a pair of groove portions 20c of the clutch outer ring 20, a pair of groove portions 21b of the clutch inner ring 21, and a clutch provided outside the wedge space in which the transfer surface 22a of the roller 22 moves. It is formed by each space including the space around the groove portion 23e of the cage 23 and the reduced diameter portion 22b of the roller 22.

  Further, as shown in FIG. 1B, the clutch retainer 23 has a flange portion in a state where the inner wall surface of the annular portion 23a is located between the groove portion 20c of the clutch outer ring 20 and the groove portion 21b of the clutch inner ring 21. The clearance between the clutch outer ring 20 and the clutch inner ring 21 and the clutch cage 23 is made as small as possible. For this reason, the grease reservoir G, the grease reservoir G, and the space S connected on the bearing side are prevented from communicating as much as possible so that the grease is accumulated in the clutch space including the grease reservoir G.

  Therefore, as shown in FIG. 6A, when the one-way clutch 13 shifts from the engaged state to the idling state, if the roller 22 moves from the narrow side of the wedge space to the wide side, the roller 22 is pushed away in the wedge space. The grease passes through the grease reservoir G provided outside the wedge space and moves to the space where the rollers 22 existed.

  On the other hand, as shown in FIG. 6B, when the one-way clutch shifts from the idle state to the engaged state, the roller 22 is pushed away in the wedge space even when the roller 22 moves from the wide side to the narrow side. The applied grease passes through the grease reservoir G and moves to the position where the roller 22 was.

  Therefore, when the roller 22 moves, the grease can move smoothly through the grease reservoir G, so that the grease does not hinder the movement of the roller 22 and there is a possibility that poor engagement or idling will occur. Absent. Further, since the grease reservoir G is filled with grease, the amount of grease filled in the clutch space can be increased as compared with the conventional case.

  Therefore, according to the pulley device 10 with a built-in one-way clutch of the present embodiment, the pair of groove portions 20c of the clutch outer ring 20, the pair of groove portions 21b of the clutch inner ring 21, and the clutch retainer 23 provided outside the wedge space. Since the grease reservoir G is formed by the spaces including the space around the groove portion 23e and the reduced diameter portion 22b of the roller 22, the one-way clutch 13 shifts from the engaged state to the idle state or from the idle state to the engaged state. At this time, the grease does not hinder the movement of the roller 22, and there is no possibility of poor engagement or idling. Further, since the grease reservoir G is filled with grease, the amount of grease filled can be increased as compared with the conventional case.

  The diameter-reduced portion 22b of the roller 22 may be formed at both ends as shown in FIG. 5, but the both ends 22c are abbreviated as the transfer surface 22a as in the roller 22 ′ shown in FIG. 7A. A groove-shaped reduced diameter portion 22b may be provided between the transfer surface 22a and both end portions 22c with the same diameter. The reduced diameter portion 22b of the roller 22 is formed in a small diameter cylindrical shape, but the reduced diameter portion 22b may be tapered as shown in FIG. 7B. Further, these reduced diameter portions may be provided partially in the circumferential direction.

  In this embodiment, the grease reservoir G is formed by a space around the pair of groove portions 20c of the clutch outer ring 20, the pair of groove portions 21b of the clutch inner ring 21, the groove portion 23e of the clutch retainer 23, and the reduced diameter portion 22b of the roller 22. However, the grease reservoir G may be formed by a pair of groove portions 20c of the clutch outer ring 20 and a pair of groove portions 21b of the clutch inner ring 21 as in the one-way clutch built-in pulley apparatus 10 ′ shown in FIG. .

(Second Embodiment)
Next, a pulley device with a built-in one-way clutch according to a second embodiment of the present invention will be described in detail with reference to FIGS. In addition, the same code | symbol is attached | subjected about a part equivalent to 1st Embodiment, and description is abbreviate | omitted or simplified.

  The one-way clutch built-in pulley device 30 of the present embodiment is different from that of the first embodiment in the configuration of the one-way clutch 31 that forms the grease reservoir G. In the one-way clutch 31 of the present embodiment, the clutch outer ring 32, the clutch inner ring 33, and the roller 34 are the same as in the conventional configuration. The clutch outer ring 32 and the clutch inner ring 33 do not have a groove, and the roller 34 has a reduced diameter. These are configured and arranged in the same manner as in the first embodiment except that they do not have a portion. On the other hand, the clutch retainer 35 is provided with a convex portion 35a on the roller side wall surface 23e of the pair of annular portions 23a instead of providing the groove portion on the bridge portion 23b as in the first embodiment.

Therefore, the grease reservoir G of the present embodiment is provided with the convex portion 35a of the clutch retainer 35, so that the upper and lower sides of the convex portion 35a are located between the inner peripheral surface of the clutch outer ring 32 and the outer peripheral surface of the clutch inner ring 33. It is constituted by a space formed on the side. As a result, when the one-way clutch 31 shifts from the engaged state to the idling state or from the idling state to the engaged state, the grease moves through the grease reservoir G, so that the grease inhibits the movement of the roller 34. There is no possibility of poor engagement or idling. Further, since the grease reservoir G is filled with grease, the amount of grease filled can be increased as compared with the conventional case.
Other configurations and operations are the same as those in the first embodiment.

  In the present embodiment, the convex portion 35a of the clutch retainer 35 is formed at the radial intermediate portion of the roller side wall surface 23e. However, the one-way clutch built-in type according to the modification of the present embodiment shown in FIGS. In the pulley device 30 ′, the convex portion 35a ′ of the clutch retainer 35 ′ may be formed so as to protrude from the roller side wall surface 23e in a state where the inner peripheral surface thereof coincides with the inner peripheral surfaces of the pair of annular portions 23a. . Thus, the grease reservoir G is formed in a space formed on the upper side of the convex portion 35 a ′ of the clutch retainer 35 between the inner peripheral surface of the clutch outer ring 32 and the outer peripheral surface of the clutch inner ring 33.

(Third embodiment)
Next, a pulley device with a built-in one-way clutch according to a third embodiment of the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 13, in the one-way clutch built-in pulley apparatus 40 according to the present embodiment, a sleeve 41 fixed to a rotating shaft (not shown) is disposed concentrically with the sleeve 41 on the radially outer side of the sleeve 41. A one-way clutch 43 and a pair of support bearings 44a and 44b are disposed between the pulley 42 having a belt groove 42a formed on the outer peripheral surface.

  In the one-way clutch 43, the clutch outer ring is formed integrally with the pulley 42, and the clutch inner ring is formed integrally with the sleeve 41. Therefore, the cylindrical surface 42b and the ramp surface 41a are formed on the pulley 42 and the sleeve 41, respectively. Further, the one-way clutch 43 includes a plurality of rollers 45 that are engaging members rotatably held in a wedge space formed between the cylindrical surface 42b and the ramp surface 41a, and a plurality of rollers that individually accommodate the rollers 45. A clutch retainer 46 having a plurality of pockets, and a spring 47 that elastically presses each roller 45 in the locking direction.

  Further, the support bearings 44a and 44b of this embodiment are a combination of a cylindrical roller bearing in which the rolling elements are cylindrical rollers 48 and a deep groove ball bearing in which the rolling elements are balls 49. In these support bearings 44a and 44b, both the outer ring and the inner ring are formed integrally with the pulley 42 and the sleeve 41, and the outer ring raceway surfaces 42c and 42d and the inner ring raceway surfaces 41b and 41c are formed on the pulley 42 and the sleeve 41, respectively. The The support bearings 44a and 44b further include a cage 50 and a seal member 51 as in the first embodiment. A waterproof ring 52 is attached to the outer peripheral surface of the sleeve 41 outside the support member 44 a in the axial direction of the seal member 51.

  Also in the pulley apparatus 40 with a built-in one-way clutch configured as described above, as shown in FIGS. 13 and 14, a pair of annular grooves 41 d are formed on the ramp surface 41 a of the sleeve 41 that constitutes the inner ring of the clutch. Are formed symmetrically with respect to the axial center, and constitute the grease reservoir G of the present embodiment.

  As a result, when the one-way clutch 43 shifts from the engaged state to the idle state or from the idle state to the engaged state, the grease at the destination of the roller 45 moves to the position where the roller 45 has moved through the grease reservoir G. The grease does not hinder the flow and the movement of the rollers 34, and there is no possibility of poor engagement or idling. Further, since the grease reservoir G is filled with grease, the amount of grease filled can be increased as compared with the conventional case.

Further, when the clutch inner ring is configured integrally with the sleeve 41 as in the present embodiment, the ramp surface 41a is formed by machining, so that the groove portion 41d can be processed at the same time. The manufacturing process does not increase, and it can be easily formed without increasing the cost.
Other configurations and operations are the same as those in the first embodiment.

(Fourth embodiment)
Next, a pulley device with a built-in one-way clutch according to a fourth embodiment of the present invention will be described in detail with reference to FIGS. 15 and 16. In addition, the same code | symbol is attached | subjected about the part equivalent to 3rd Embodiment, and description is abbreviate | omitted or simplified.

  In the pulley device 50 with a built-in one-way clutch of the present embodiment, instead of forming a pair of grooves as in the third embodiment on the ramp surface 41a of the sleeve 41 ′, a pair of annular members is formed on the cylindrical surface 42b of the pulley 42 ′. By forming the groove 42e, the grease reservoir G of the present embodiment is configured.

As a result, when the one-way clutch 43 shifts from the engaged state to the idle state or from the idle state to the engaged state, the grease at the destination of the roller 45 moves to the position where the roller 45 has moved through the grease reservoir G. The grease does not hinder the flow and the movement of the rollers 45, and there is no possibility of poor engagement or idling. Further, since the grease reservoir G is filled with grease, the amount of grease filled can be increased as compared with the conventional case.
In addition, about another structure and effect | action, it is the same as that of the thing of 3rd Embodiment.

(Fifth embodiment)
Next, a pulley device with a built-in one-way clutch according to a fifth embodiment of the present invention will be described in detail with reference to FIGS. In addition, the same code | symbol is attached | subjected about the part equivalent to 3rd Embodiment, and description is abbreviate | omitted or simplified.

  The pulley device 60 with a built-in one-way clutch according to the present embodiment, instead of forming a pair of grooves as in the third embodiment on the ramp surface of the sleeve 41 ′, as shown in FIG. By forming a recess 46d in the roller side wall surface 46c between the adjacent bridge portions 46b with the pair of annular portions 46a, the grease reservoir G of the present embodiment is configured.

As a result, when the one-way clutch 43 shifts from the engaged state to the idle state or from the idle state to the engaged state, the grease at the destination of the roller 45 moves to the position where the roller 45 has moved through the grease reservoir G. The grease does not hinder the flow and the movement of the rollers 45, and there is no possibility of poor engagement or idling. Further, since the grease reservoir G is filled with grease, the amount of grease filled can be increased as compared with the conventional case.
In the present embodiment, the grease reservoir G can be formed without changing the torque transmission amount of the one-way clutch 43 from the conventional one.
In addition, about another structure and effect | action, it is the same as that of the thing of 3rd Embodiment.

(Sixth embodiment)
Next, a pulley device with a built-in one-way clutch according to a sixth embodiment of the present invention will be described in detail with reference to FIG. In addition, the same code | symbol is attached | subjected about a part equivalent to 4th Embodiment, and description is abbreviate | omitted or simplified.

  In the pulley device 70 with a built-in one-way clutch according to the present embodiment, a pair of annular groove portions 42e ′ are formed on the inner peripheral surface of the pulley 42 as in the fourth embodiment, but these groove portions 42e ′ 45 is not overlapped in the axial direction but is formed at a position overlapping the pair of annular portions 46a of the clutch retainer 46 in the axial direction, and this groove portion 42e 'constitutes the grease reservoir G of the present embodiment. To do.

As a result, as in the fourth embodiment, when the one-way clutch 43 shifts from the engaged state to the idle state or from the idle state to the engaged state, the grease at the moving destination of the roller 45 passes through the grease reservoir G and the roller 45. The grease does not hinder the movement of the rollers 45, and there is no possibility of poor engagement or idling. Further, since the grease reservoir G is filled with grease, the amount of grease filled can be increased as compared with the conventional case.
In the present embodiment, the grease reservoir G can be formed without changing the torque transmission amount of the one-way clutch 43 from the conventional one.

Furthermore, when the cam surface 41a is formed on the outer peripheral surface of the sleeve 41 'constituting the inner ring of the clutch and the inner peripheral surface of the pulley 42 constituting the outer ring of the clutch is the cylindrical surface 42b as in the present embodiment, the pulley 42 In the processing of the inner peripheral surface, the diameter may be different between the outer ring of the clutch and the outer ring of the support bearing. In this case, it is necessary to provide a machining clearance groove between the cylindrical surface 42b and the outer ring raceway surfaces 42c and 42d, and this position is used as the groove portion 42e 'for forming the grease reservoir G. Therefore, the groove portion 42e' is processed. This does not increase the number of processes.
In addition, this embodiment is applied also when forming the groove part in the outer peripheral surface of a sleeve in the form in which the pulley which comprises a clutch outer ring | wheel has a cam surface.
Other configurations and operations are the same as those of the fourth embodiment.

The present invention is not limited to the embodiments described above, and modifications, improvements, and the like can be made as appropriate.
The grease reservoir of the present invention may be constituted by at least one of a groove portion and a reduced diameter portion formed in a clutch outer ring, a clutch inner ring, a clutch retainer, a roller, a pulley, a sleeve, and the like. May be used.

  Further, the grease reservoir of the present invention is provided between the rolling elements of the pair of support bearings, and it is sufficient that the grease does not hinder the movement when the roller moves, and can reliably lubricate the roller. Are provided inward in the axial direction from both outer side surfaces of the pair of annular portions of the clutch cage. For this reason, the axial direction position of each groove part of a clutch inner ring | wheel and a clutch outer ring | wheel should just be formed in the position which overlaps with a clutch holder | retainer. Further, in this embodiment, the groove portion of the clutch cage is formed on the inner peripheral surface or the roller side inner wall surface, but depending on the shape of the cage, the ring portion, the bridge portion, the central column portion, and both end columns You may form in the arbitrary outer peripheral surfaces of a part.

  The grease reservoir according to the present embodiment is formed by providing a groove portion or a reduced diameter portion in a clutch outer ring, a clutch inner ring, a clutch cage, a roller, a pulley, a sleeve, and the like. As in the prior art, the clutch space between the clutch outer ring and the clutch inner ring facing each other, excluding the roller, clutch retainer, and spring parts, is also filled.

Further, the one-way clutch of the present invention may be a roller clutch using an engaging roller as in the present embodiment, a sprag clutch using a sprag as an engaging member, or a cam clutch using a cam as an engaging member.
Further, in the one-way clutch of the present invention, the rotational force may be input from either the pulley or the sleeve, and only when one of the pulley and the sleeve tends to rotate relative to the other in a predetermined direction. Transmits rotational force from one to the other.

  In addition, when the pulley device with a built-in one-way clutch is used for driving an auxiliary machine of an engine idle stop mechanism, an auxiliary machine such as a compressor is driven by a dedicated motor when the engine is stopped. Although it does not receive, it becomes the structure which receives the rotation fluctuation generate | occur | produced from the motor for an auxiliary machine drive.

(A) is sectional drawing for demonstrating the pulley apparatus with a built-in one-way clutch which concerns on 1st Embodiment of this invention, (b) is the partial longitudinal cross-section along the AO line of (a). It is a figure and (c) is the fragmentary longitudinal cross-section along the BO line of (a). FIG. 2 is a perspective view showing the clutch outer ring of FIG. It is a perspective view which shows the clutch inner ring | wheel of FIG. It is a perspective view which shows the clutch holder | retainer of FIG. It is a perspective view which shows the roller of FIG. 1A is a cross-sectional view taken along line IV-IV in FIG. 1A, in which FIG. 1A shows the movement of grease when the one-way clutch transitions from the engaged state to the idle state, and FIG. The movement of the grease when shifting from the idling state to the engaged state is shown. It is a perspective view which shows the modification of the roller of the one way clutch which concerns on 1st Embodiment of this invention. It is a fragmentary longitudinal cross-section which shows the one-way clutch built-in type pulley apparatus which concerns on the modification of 1st Embodiment of this invention. It is a fragmentary longitudinal cross-sectional view of the one-way clutch built-in type pulley apparatus which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the clutch holder | retainer of FIG. It is a fragmentary longitudinal cross-sectional view of the one-way clutch built-in type pulley apparatus which concerns on the modification of 2nd Embodiment of this invention. It is a perspective view which shows the clutch holder | retainer of FIG. It is sectional drawing of the pulley apparatus with a built-in one-way clutch which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the sleeve of FIG. It is sectional drawing of the pulley apparatus with a built-in one-way clutch which concerns on 4th Embodiment of this invention. FIG. 16 is a perspective view showing the pulley of FIG. It is sectional drawing of the one-way clutch built-in type pulley apparatus which concerns on 5th Embodiment of this invention. It is a perspective view which shows the clutch holder | retainer of FIG. It is sectional drawing of the pulley apparatus with a built-in one-way clutch which concerns on 6th Embodiment of this invention. It is sectional drawing of the conventional one-way clutch built-in type pulley apparatus.

Explanation of symbols

10, 30, 40, 50, 60, 70 One-way clutch built-in pulley device 11, 41, 41 'Sleeve 12, 42, 42' Pulley 13, 31, 43 One-way clutch 14a, 14b, 44a, 44b Support bearing 17 49 balls (rolling elements)
48 rollers (rolling elements)
20, 32 Clutch outer ring 21, 33 Clutch inner ring 22, 34, 45 Roller (engagement element)
23, 35, 35 ', 46, 46' Clutch retainer 24, 47 Spring 20c, 21b, 23e, 41d, 42e, 42e ', 46e Groove 22b Reduced diameter portion 35a, 35a' Protrusion G Grease reservoir

Claims (1)

Sleeve,
A pulley disposed around the sleeve and concentrically with the sleeve;
The clutch outer ring, the clutch inner ring, a plurality of engagement elements disposed between the clutch outer and inner ring, and a clutch retainer for holding the engagement elements are disposed between the sleeve and the pulley. A one-way clutch,
A pair of support bearings disposed on both sides of the one-way clutch between the sleeve and the pulley, each having an outer ring, an inner ring, and a plurality of rolling elements disposed between the outer and inner rings;
A one-way clutch built-in pulley device comprising:
A pulley apparatus with a built-in one-way clutch, wherein a grease reservoir is provided between the rolling elements of the pair of support bearings.

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