JP5685975B2 - Roller clutch and roller clutch built-in pulley device - Google Patents

Description

  The present invention relates to a roller clutch incorporated in a pulley device of an automotive auxiliary machine such as an alternator that is a generator of a vehicle, a starter motor for an idling stop vehicle, and a pulley device with a built-in roller clutch used as the pulley device. Regarding improvement.

  2. Description of the Related Art Conventionally, a pulley device with a built-in roller clutch in which a roller clutch is incorporated in a pulley device of an automotive auxiliary machine such as an alternator or a starter motor is known as described in Patent Documents 1 to 5, for example. FIG. 9 shows an example of a pulley device with a built-in roller clutch, which is conventionally known as described in each of these patent documents. The pulley apparatus 1 with a built-in roller clutch is fixed to a pulley element 2 which is an outer diameter side member described in the claims and a distal end portion of a rotary drive shaft such as an alternator for hanging an endless belt around the outer peripheral surface thereof. For this purpose, the sleeve 3 which is the inner diameter side member described in the claims is arranged concentrically with each other.

  Between the outer peripheral surface of the sleeve 3 and the inner peripheral surface of the pulley element 2, ball bearings 4 and 4, which are support bearings, and a roller clutch 5 are provided. In order to provide the ball bearings 4 and 4 and the roller clutch 5, the inner peripheral surface of the pulley element 2 is a simple cylindrical surface, and the outer peripheral surface of the sleeve 3 is the large-diameter portion 6 and both ends of the axially intermediate portion. The small-diameter portions 7 and 7 are stepped cylindrical surfaces made continuous by step portions.

  Then, the roller clutch 5 is disposed at the axially intermediate portion of the annular space existing between the outer peripheral surface of the sleeve 3 and the inner peripheral surface of the pulley element 2, and the roller clutch is disposed at both axially opposite portions of the annular space. The ball bearings 4 and 4 are arranged at positions sandwiching 5 from both sides in the axial direction. Among these, the ball bearings 4 and 4 have the role of allowing the pulley element 2 and the sleeve 3 to be concentric with each other and enabling the relative rotation of both the members 2 and 3.

The roller clutch 5 includes an outer ring 8 that is an outer ring equivalent member, an inner ring 9 that is an inner ring equivalent member, a cam surface 10, a cylindrical surface 11, a plurality of rollers 12, a cage 13, and a plurality of leaf springs. 14 (see FIGS. 10 to 12 described later).
The outer ring 8 and the inner ring 9 are entirely formed in a cylindrical shape by a hard metal plate such as bearing steel or case-hardened steel. Of these, the outer ring 8 includes inward flange portions at both axial end portions, and is fitted and fixed to the axially intermediate portion of the inner peripheral surface of the pulley element 2 by an interference fit. The inner ring 9 is arranged concentrically with the outer ring 8 on the inner diameter side of the outer ring 8 in a state in which the inner ring 9 is externally fitted and fixed to the large-diameter portion 6 of the sleeve 3.

  The cam surface 10 and the cylindrical surface 11 are formed so as to be divided into an inner peripheral surface of the outer ring 8 and an outer peripheral surface of the inner ring 9. Of these, the cam surface 10 is an uneven surface extending in the circumferential direction, and is formed on the outer peripheral surface of the inner ring 9 in the illustrated example. In other words, axial concave portions called ramp portions are formed on the outer peripheral surface of the inner ring 9 at equal intervals in the circumferential direction. On the other hand, the cylindrical surface 11 is formed on the inner peripheral surface of the outer ring 8, and the inner diameter does not change over the entire periphery. In the example shown in the drawing, the cam surface 10 is connected to the outer peripheral surface of the inner ring 9 on the outer peripheral surface of the inner ring 9 because it is considered that the roller clutch is incorporated in a pulley device for rotating the alternator. Surfaces 11 are formed on the inner peripheral surface of the outer ring 8, respectively. On the other hand, it is not necessary to connect at the time of high-speed rotation like a roller clutch incorporated in a pulley apparatus of an auxiliary machine for an automobile such as a starter motor for an idling stop vehicle. When it is preferable not to slide the other peripheral surface, the cam surface 10 is formed on the inner peripheral surface of the outer ring 8, and the cylindrical surface 11 is formed on the outer peripheral surface of the inner ring 9.

  Each roller 12 is provided in a cylindrical space 15 between the cam surface 10 and the cylindrical surface 11 while being held by the cage 13. The retainer 13 is integrally formed by injection molding a synthetic resin, and includes a pair of rim portions 16a and 16b and the same number of column portions 17 as the rollers 12 (see FIGS. 11 to 12 described later). ) And twice as many support plate portions 18 and 18a as the rollers 12 (see FIGS. 11 to 12 described later). Among the components of the retainer 13, the rim portions 16a and 16b are each annular and are arranged concentrically at intervals. Further, the column parts 17 are provided at regular intervals in the circumferential direction intermittently in a state where the radially inner end portions of the rim parts 16a and 16b are connected to each other. Further, each of the support plate portions 18 and 18a is a part of the inner side surface (a side surface facing each other) of the rim portions 16a and 16b, and the phase in the circumferential direction coincides with a part of the column portion 17. It forms in the state which protrudes in the radial direction outward from the outer-diameter side surface of these each pillar part 17 in the direction which approaches a part mutually. Each of the support plate portions 18 and 18a has a rectangular plate shape, and two of the four sides are formed in a state where the inner side surfaces of the rim portions 16a and 16b and the outer diameter side surfaces of the column portions 17 are continuous. Thus, the strength and rigidity against the circumferential force applied from each leaf spring 14 is ensured. The cage having such a structure is formed by engaging the protrusions formed on the inner peripheral edges of the rim portions 16a and 16b with the recesses (lamp portions) formed on the outer peripheral surface of the inner ring 9. It is installed in the cylindrical space 15 in a state where relative rotation with respect to the inner ring 9 is prevented.

  Each of the rollers 12 is held in the cage 13 as described above so as to be capable of displacement and rolling between the support plate portions 18 and 18a adjacent in the circumferential direction. In this state, the elastic force in the same direction with respect to the circumferential direction is applied to the rollers 12 by the leaf springs 14. As shown in FIGS. 10A and 10B, each of the leaf springs 14 is formed by bending both ends of the belt-like elastic metal plate at an acute angle in a direction approaching each other. A pair of elastic pressing portions 20, 20 is provided on the portion. Each of the plate springs 14 has a surface opposite to the elastic pressing portions 20 and 20 at both end portions of the substrate portion 19 in contact with the support plate portions 18 and 18, and each elastic member. The pressing portions 20 and 20 are assembled between the retainer 13 and each roller 12 in a state where the tip portions of the pressing portions 20 and 20 are in elastic contact with the rolling surfaces of the rollers 12. In this state, the leaf springs 14 elastically press the rollers 12 in the same direction with respect to the circumferential direction.

  The roller clutch 5 as described above is used when the outer ring 8 tends to rotate in a predetermined direction with respect to the inner ring 9 (the same direction as the direction in which the leaf springs 14 press the rollers 12). Connected, enabling power transmission between the outer ring 8 and the inner ring 9. On the other hand, when the outer ring 8 tends to rotate in the direction opposite to the predetermined direction with respect to the inner ring 9, the connection is broken, and the outer ring 8 and the inner ring 9 can be rotated relative to each other. . Such a roller clutch 5 incorporating the roller clutch 5 between the inner peripheral surface of the pulley element 2 and the outer peripheral surface of the sleeve 3 has a roller clutch built-in pulley device 1 in which the pulley element 2 and the sleeve 3 are Depending on the direction of rotation, the rotational force is transmitted between the pulley element 2 and the sleeve 3 or the transmission is blocked. Such an operation of the pulley device 1 with a built-in roller clutch has been widely known from the above-described patent documents 1 to 5 and is not related to the gist of the present invention. Omitted.

The roller clutch 5 incorporated in the pulley apparatus 1 with a built-in roller clutch as described above rotates at a high speed during use. For example, when the pulley device 1 with a built-in roller clutch is used for rotational drive of an alternator, the rotational speed of the roller clutch 5 may reach 5000 to 10000 min ⁻¹ . When the roller clutch 5 rotates at such a high speed, centrifugal force is applied to the leaf springs 14, and the leaf springs 14 may come out of the cage 13 radially outward. In order to prevent the leaf springs 14 from coming out due to the centrifugal force as described above, as described in, for example, Patent Document 5, both end portions of the outer peripheral edge of the substrate portion 19 (the structure shown in FIG. 11). In this case, the center portion (in the case of the structure shown in FIG. 12) is restrained by the locking plate portions 22a and 22b provided at the tip portions of the support plate portions 18a and 18a or the intermediate restraint plate portion 21. ing.

  However, in the structure described in FIGS. 11 to 12, if the rotational speed of the roller clutch 5 is increased and the centrifugal force applied to the leaf springs 14 is increased, sufficient reliability may not be ensured. There is sex. Further, it is not always easy to assemble the leaf springs 14 to the retainer 13 while getting over the locking collars 22a and 22b. Furthermore, when forming the locking collars 22a and 22b large enough to exhibit a sufficient retaining function, the structure of the mold apparatus for injection molding the retainer 13 becomes complicated. That is, the mold elements are separated while elastically deforming the locking hook portions 22a and 22b immediately after formation, so that the so-called forced removal cannot be performed, and the structure of each mold element is retracted from the locking hook portions 22a and 22b. However, since it is necessary to make the structure separable, the structure of the mold apparatus becomes complicated, and the manufacturing cost of the cage 13 increases.

  On the other hand, as shown in FIG. 13, the flange portions 23 and 23 projecting in the direction approaching each other are provided at the outer diameter side end portions of the inner side surfaces of the pair of rim portions 16c and 16c constituting the cage 13a. A structure is conceivable. With such a structure, if the outer diameter side edges of both end portions in the axial direction of the leaf springs 14 are suppressed by the both flange portions 23, 23, the leaf springs can be used even if the rotational speed of the roller clutch becomes too large. It is possible to reliably prevent 14 from coming out radially outward. However, in the structure shown in FIG. 13, the work of assembling the leaf springs 14 to the cage 13a is considerably troublesome.

Japanese Patent Publication No.7-72585 Japanese Patent Laid-Open No. 11-63170 JP 2002-130433 A JP 2005-3059 A JP 2007-198582 A

  In the present invention, in view of the circumstances as described above, it is easy to assemble each leaf spring to the cage, and each leaf spring comes out of the cage even if the rotational speed of use is considerably increased. It was invented to realize a structure that can reliably prevent this.

Of the roller clutch and the roller clutch built-in type pulley device of the present invention, the roller clutch described in claim 1 is similar to the above-described conventionally known roller clutch, the outer ring equivalent member, the inner ring equivalent member, and the cam. A surface, a cylindrical surface, a plurality of rollers, a cage, and a plurality of leaf springs.
In particular, in the roller clutch of the present invention, the holding rings are provided at both axial ends of the cage, and the inner peripheral surfaces of the holding rings and the outer peripheral edges of the axial ends of the leaf springs are in the radial direction. The outer fitting is supported in a state of facing. The restraining ring is formed by bending a metal plate into an L-shaped cross section, an outer diameter side cylindrical portion, and an annular portion bent radially inward from the axial end of the outer diameter side cylindrical portion. Shall be provided. And among these, the outer diameter side cylindrical portion is externally fitted to both rim portions provided at both ends of the cage, and the annular portion is in contact with the axially outer side surfaces of both rim portions. Thus, the front half portions of both the outer diameter side cylindrical portions are positioned around the axial end portions of the leaf springs.

Further, the pulley device with a built-in roller clutch according to claim 5 is similar to the pulley device with a built-in roller clutch as described above, and includes an inner diameter side member, an outer diameter side member, and a roller clutch. And a support bearing.
In particular, in the pulley apparatus with a built-in roller clutch of the present invention, the roller clutch is a roller clutch as described above.

According to the roller clutch and the roller clutch built-in type pulley apparatus of the present invention configured as described above, the operation of assembling each leaf spring to the cage is easy, and even if the rotational speed of use is considerably increased, These leaf springs can be reliably prevented from coming out of the cage.
That is, in the case of the structure of the present invention, the pair of retaining rings fitted around both ends of the cage prevent the leaf springs from coming out of the cage. When assembled to the cage, the holding rings are not yet attached to the cage. Therefore, this assembling work can be easily performed because it is sufficient to simply displace each leaf spring in the radial direction with respect to the cage. Then, after assembling each of these leaf springs at a predetermined position of the retainer, if both restraining rings are attached to the retainer, both axial ends of the outer diameter side edges of these leaf springs are restrained. It is suppressed by the ring. Even when a large centrifugal force is applied, the leaf springs do not come out of the cage outward in the radial direction. Since the work of mounting the holding rings on the cage can be easily performed, the assembly work of the leaf springs to the cage can be facilitated as a whole.

The fragmentary sectional view which shows the 1st example of embodiment of this invention in the state equipped with the roller. The perspective view which shows the state (A) before mounting | wearing with a retainer ring, and the state (B) after mounting | wearing after attaching a roller and a leaf | plate spring to a holder | retainer. The figure similar to FIG. 1 which shows the 2nd example of embodiment of this invention. The figure similar to FIG. 1 which shows the 3rd example. The figure similar to FIG. 1 which shows the 4th example. The figure similar to FIG. 1 which shows the same 5th example. The figure similar to FIG. 1 which shows the 6th example. The figure similar to FIG. 1 which shows one example of the reference example relevant to this invention . Sectional drawing which shows an example of a pulley apparatus with a built-in roller clutch. The perspective view which shows two examples of the shape of a leaf | plate spring. A first example of a structure for preventing the leaf spring from coming out of the cage, which has been conventionally known, is a state before the leaf spring is mounted by cutting a part of the cage (A) and after the loading. The perspective view shown with a state (B). The figure similar to (B) of Drawing 11 showing the 2nd example. The figure similar to FIG. 1 which shows the structure which prevents the leaf | plate spring pulling out from the holder | retainer considered previously.

[First example of embodiment]
1 and 2 show a first example of an embodiment of the present invention corresponding to claim 1 . A feature of the present invention including this example is a structure for preventing the leaf springs 14 and 14 from coming out of the cage 13 radially outward. Since the structure and operation of other parts are the same as those conventionally known including the structures shown in FIGS. 9 to 12 described above, overlapping illustrations and explanations are omitted, and the present invention will be described below. The description will focus on the characteristic part. When carrying out the present invention, the locking hooks 22a and 22b as shown in FIGS. 11 to 12 are not necessarily required. However, after the plate springs 14 and 14 are assembled to the cage 13 and before the pair of holding rings 24 and 24 are attached to both ends of the cage 13, the plate springs 14 and 14 are mounted on the cage 13. It is preferable to provide a structure for preventing 14 and 14 from coming out.

  For this reason, in the case of this example, as shown in FIG. 2, locking collar portions 22 c and 22 c are formed at the outer diameter side end portions of the intermediate holding plate portions 21 and 21. However, these locking hooks 22c and 22c are used for temporary fixing until the both holding rings 24 and 24 are mounted, and prevent the leaf springs 14 and 14 from coming out radially outward due to centrifugal force. There is no need to play a role. Therefore, the protruding amount from the circumferential side surface of each of the intermediate holding plate portions 21 and 21 may be extremely small, and the shape may be a smooth shape such as a convex arc shape. Accordingly, it is possible to forcibly remove the mold elements while elastically deforming the locking collars 22c, 22c immediately after the formation by injection molding, and the mold apparatus is not complicated.

Further, due to the presence of the locking hooks 22c and 22c, the work of assembling the leaf springs 14 and 14 to the retainer 13 is not complicated. For example, the base plate portions 19 and 19 of the plate springs 14 and 14 are attached to the front end edge portions of the intermediate holding plate portions 21 and 21 including the locking flange portions 22c and 22c, respectively. If a guide inclined surface or the like for facilitating getting over 22c is formed, there is almost no hindrance to the work of assembling the leaf springs 14 and 14 to the retainer 13. Therefore, this assembling work can be easily performed.
In addition, in the state which assembled | attached the board | substrate part 19 of each said leaf | plate springs 14 and 14 to the said holder | retainer 13, these board | plate parts 19 of each leaf | plate spring 14 and 14 are each paired with the support board parts 18, 18 and 1 and 1 each. If it is possible to prevent the leaf springs 14 and 14 from being detached from the cage 13 by elastic bending with the intermediate holding plate portions 21, the locking collar portions 22 c and 22 c are It can be omitted. In this case, the forced removal is unnecessary.

  In the case of the structure of this example, the holding rings 24 and 24 are formed in an annular shape with an L-shaped cross section by bending a metal plate such as a carbon steel plate or a stainless steel plate. In other words, each of the holding rings 24 and 24 includes an outer diameter side cylindrical portion 25 and an annular portion 26 that is bent radially inward from the axial end of the outer diameter side cylindrical portion 25. Of these, the inner diameter in the free state of the outer diameter side cylindrical portion 25 is larger than the outer diameter in the free state of the largest diameter portion of the pair of rim portions 16, 16 provided at both ends of the cage 13. Slightly smaller. Further, the inner diameter of the annular ring portion 26 is the same as or slightly larger than the inner diameters of both ends of the cage 13.

  The both holding rings 24, 24 each having the above-described configuration are attached to both ends of the cage 13 after assembling the leaf springs 14, 14 to the cage 13. Specifically, the outer diameter side cylindrical portion 25 is externally fitted to a pair of rim portions 16, 16 provided at both ends of the cage 13 by an interference fit, and the annular portion 26 is connected to both the rim portions. 16 and 16 are brought into contact with the outer surfaces in the axial direction. Of the outer peripheral surfaces of both the rim portions 16 and 16, the portion excluding the inner end portion is a partially conical convex surface inclined in a direction in which the outer diameter decreases toward the outer end portion. The operation of fitting the portion 25 to the rim portions 16, 16 can be easily performed. Further, since the axial dimension of the outer diameter side cylindrical portion 25 is sufficiently larger than the axial dimension of the rim portions 16, 16, the annular portion 26 is brought into contact with the outer surface in the axial direction of the rim portion 16. In the state of contact, the tip half of the outer diameter side cylindrical portion 25 protrudes from the inner side surfaces of the rim portions 16, 16 to the central portion in the axial direction of the cage 13. Specifically, the outer diameter side cylindrical portion 25 substantially covers the periphery of the support plate portions 18 and 18. Accordingly, the cylindrical portions 25 on the outer diameter side of the holding rings 24, 24 around the both ends in the axial direction of the leaf springs 14, 14 supported at both ends by the support plate portions 18, 18, respectively. 25 is located. Then, the leaf springs 14 and 14 are reliably prevented from coming out of the cage 13.

[Second Example of Embodiment]
FIG. 3 shows a second example of an embodiment of the present invention corresponding to claims 1 and 3 . In the case of this example, the hook-shaped locking portions 27 and 27 protrude radially inward from the distal end edges of the outer diameter side cylindrical portions 25 and 25 constituting the pair of holding rings 24a and 24a, respectively. It is formed with. The retainer 13 is provided with the locking portions 27 and 27 in a state where the outer cylindrical portions 25 and 25 are fitted on the rim portions 16 and 16 at both axial ends of the retainer 13. The support plate portions 18 and 18 are locked to a part of the outer diameter side edges. In the case of this example, both the locking portions 27, 27 are locked to the axially inner edge portions facing each other among the outer diameter side edges of the respective support plate portions 18, 18. Then, both the retaining rings 24a, 24a from the retainer 13 are prevented from coming off. In the case of this example, since the both retaining rings 27a and 27a are used to prevent the retaining rings 24a and 24a from coming off, both the outer diameter side cylindrical portions 25 and 25 and the both rim portions 16 and 16 The fastening allowance of the fitting portion can be suppressed to be smaller than in the case of the first example of the embodiment described above.
Since the configuration and operation of the other parts are the same as those in the case of the first example, a duplicate description is omitted.

[Third example of embodiment]
FIG. 4 also shows a third example of the embodiment of the present invention corresponding to claims 1 and 3 . In the case of this example, locking portions 27a and 27a having arcuate cross-sections having a convex surface on the inner diameter side are formed at the distal end edges of the outer diameter side cylindrical portions 25 and 25 constituting the pair of holding rings 24b and 24b. , Each projecting inward in the radial direction. Except for the difference in the shape of each of the locking portions 27a and 27a, the second embodiment is the same as the second example of the embodiment described above, and a duplicate description is omitted.

[Fourth Example of Embodiment]
FIG. 5 also shows a fourth example of an embodiment of the present invention corresponding to claims 1 and 3 . In the case of this example, the axial dimensions of the outer diameter side cylindrical portions 25a, 25a constituting the pair of holding rings 24c, 24c are made shorter than in the case of the third example. Then, the locking portions 27a and 27a having a circular arc cross section formed at the front end edges of the both outer diameter side cylindrical portions 25a and 25a are connected to the outer diameter side edges of the support plate portions 18 and 18 on the cage 13 side. It engages with the respective locking notches 28, 28 formed in the intermediate portion in the axial direction. Since the structure and operation of the other parts are the same as in the case of the third example of the above-described embodiment, redundant description is omitted.

[Fifth Example of Embodiment]
FIG. 6 shows a fifth example of an embodiment of the present invention corresponding to claims 1 to 3 . In the case of this example, on the inner peripheral edge portion of the annular ring portions 26, 26 constituting the pair of holding rings 24d, 24d, the circular ring portions 26, 26 extend in the same direction as the outer diameter side cylindrical portions 25a, 25a. Bent inner cylindrical portions 29, 29 that are bent are provided concentrically with the outer cylindrical portions 25a, 25a. Then, in a state where the both holding rings 24d and 24d are mounted on both ends of the retainer 13, between the outer diameter side cylindrical portions 25a and 25a and the inner diameter side cylindrical portions 29 and 29, the retainer 13 The outer half portions in the axial direction of the rim portions 16, 16 constituting both end portions are sandwiched from both radial sides. Since the structure and operation of the other parts are the same as in the case of the fourth example of the above-described embodiment, redundant description is omitted.

[Sixth Example of Embodiment]
FIG. 7 shows a sixth example of an embodiment of the present invention corresponding to claims 1 to 2 and 4. In the case of this example, on the inner peripheral edge portion of the circular ring portions 26, 26 constituting the pair of holding rings 24e, 24e, the circular ring portions 26, 26 extend in the same direction as the outer diameter side cylindrical portions 25, 25. The bent inner cylindrical portions 29 and 29 are provided concentrically with the outer cylindrical portions 25 and 25. And the latching | locking part 27b, 27b is formed in the front end edge of this internal diameter side cylindrical part 29, 29 in the state protruded to radial direction outward. And this latching | locking part 27b, 27b is latched by the latching recessed parts 30 and 30 formed in the internal peripheral surface of the rim | limb parts 16 and 16 which comprise the both ends of the holder | retainer 13, The both retaining rings 24e, 24e are prevented from coming off. Since the structure and operation of other parts are the same as in the case of the first example of the above-described embodiment, a duplicate description is omitted.

[ One Reference Example Related to the Present Invention ]
FIG. 8 shows an example of a reference example related to the present invention . In the case of this reference example , locking recesses 30a and 30a are formed in part of the outer diameter side edges of the support plate portions 18 and 18 provided in the cage 13, respectively. Further, in the case of this reference example, the width dimensions in the axial direction of the holding rings 24f and 24f for preventing the leaf springs 14 from being removed from the cage 13 are set to be the same as those of the support plate portions 18 and 18. It is smaller than the width dimension in the direction. Then, in a state where both the holding rings 24f and 24f are engaged with the respective locking recesses 30a and 30a, both axial ends of the retainer 13 are provided around the axial end portions of the leaf springs 14. It is fitted. The holding rings 24f and 24f are made of metal plates and are locked to the locking recesses 30a and 30a while elastically deforming both ends of the holding ring and the retainer 13 themselves. Since the structure and operation of other parts are the same as in the case of the first example of the above-described embodiment, a duplicate description is omitted.

  The roller clutch configured as described above, for example, is assembled between the outer peripheral surface of the pulley element 2 and the outer peripheral surface of the sleeve 3 as shown in FIG. . However, the application of the roller clutch of the present invention is not limited to such a pulley device with a built-in roller clutch, but a power transmission unit of various rotary machine devices that transmits a rotational driving force in one direction while rotating at a high speed. Applicable to.

DESCRIPTION OF SYMBOLS 1 Roller clutch built-in pulley apparatus 2 Pulley element 3 Sleeve 4 Ball bearing 5 Roller clutch 6 Large diameter part 7 Small diameter part 8 Outer ring 9 Inner ring 10 Cam surface 11 Cylindrical surface 12 Roller 13, 13a Cage 14 Leaf spring 15 Cylindrical space 16 , 16a, 16b, 16c Rim part 17 Pillar part 18, 18a Support plate part 19 Substrate part 20 Pressing plate part 21 Intermediate holding plate part 22a, 22b, 22c Locking hook part 23 Gutter part 24, 24a, 24b, 24c, 24d 24e, 24f Retaining ring 25, 25a Outer diameter side cylindrical part 26 Annular part 27, 27a, 27b Locking part 28 Locking notch 29 Inner diameter side cylindrical part 30, 30a Locking recess

Claims (5)

An outer ring equivalent member, an inner ring equivalent member, a cam surface, a cylindrical surface, a plurality of rollers, a cage, and a plurality of leaf springs,
The inner ring equivalent member is disposed concentrically with the outer ring equivalent member on the inner diameter side of the outer ring equivalent member,
The cam surface is a concavo-convex surface extending in a circumferential direction, and is formed on one peripheral surface of an inner peripheral surface of the outer ring equivalent member and an outer peripheral surface of the inner ring equivalent member,
The cylindrical surface is also formed on the other peripheral surface,
Each of the rollers is provided in a cylindrical space between the cam surface and the cylindrical surface,
The cage includes a pair of rim portions that are concentrically spaced apart from each other, respectively, a pair of rim portions that connect the rim portions, and the same number of column portions as the rollers, and the rim portions. And a support plate portion formed in a state in which the phase in the circumferential direction coincides with at least a part of each of the pillar portions on the inner surfaces facing each other, and in a state of protruding in a direction approaching each other, It is arranged in the cylindrical space so as not to rotate with respect to the member forming the cam surface, and the rollers are held so that they can be displaced and rolled between the support plate portions adjacent in the circumferential direction. Is,
Each of the leaf springs is provided with a pair of elastic pressing portions at both end portions in the axial direction of the substrate portion by bending both ends of the belt-shaped elastic metal plate at an acute angle in a direction approaching each other. At both ends of the substrate portion, the opposite surfaces of the elastic pressing portions are brought into contact with the support plate portions, and the tip ends of the elastic pressing portions are elastically applied to the rolling surfaces of the rollers. In the roller clutch that presses these rollers in the same direction with respect to the circumferential direction in the state of contact,
The holding ring is supported on the both ends in the axial direction of the retainer, and the inner peripheral surface of both holding rings and the outer peripheral edges of the axial ends of each leaf spring are externally fitted and supported in a radial direction .
The holding ring is formed by bending a metal plate into an L-shaped cross section, and includes an outer diameter side cylindrical portion and an annular portion bent radially inward from an axial end of the outer diameter side cylindrical portion. Of these, the outer diameter side cylindrical portion is externally fitted to the two rim portions provided at both ends of the cage, and the annular portion is in contact with the axially outer side surfaces of the two rim portions. A roller clutch characterized in that, in the state of being made, the front half portions of both the outer diameter side cylindrical portions are positioned around both axial end portions of the leaf springs . An inner diameter side cylindrical portion bent from the annular portion in the same direction as the outer diameter side cylindrical portion is provided on an inner peripheral edge portion of the annular ring portion constituting the both holding rings, and constitutes both the holding rings. 2. The roller clutch according to claim 1 , wherein a part of each of the rim portions is sandwiched from both sides in the radial direction between the outer diameter side cylindrical portion and the inner diameter side cylindrical portion. A locking portion formed in a state of projecting inward in the radial direction is locked to a part of the outer diameter side edge of each support plate portion at the distal end edge of the outer diameter side cylindrical portion constituting the both holding rings. And the roller clutch as described in any one of Claims 1-2 which aims at the removal prevention of the said both restraining ring from the said holder | retainer. A locking part formed in a state of projecting radially outward is locked to a locking recess formed on the inner peripheral surface of the both rim parts at the tip edge of the inner diameter side cylindrical part constituting the both holding rings. The roller clutch according to claim 2 , wherein the two retaining rings are prevented from coming off from the cage. An inner diameter side member fixed to the end portion of the rotating shaft, and a cylindrical outer diameter side provided with a belt groove around the inner diameter side member, concentrically arranged with the inner diameter side member, and for belting around the outer peripheral surface. Only when the member is provided between the outer peripheral surface of the inner diameter side member and the inner peripheral surface of the outer diameter side member, and the outer diameter side member tends to rotate relative to the inner diameter side member in a predetermined direction, A roller clutch that allows transmission of rotational force between the outer diameter side member and the inner diameter side member, and an outer peripheral surface of the inner diameter side member and an inner periphery of the outer diameter side member at a position adjacent to the roller clutch. Roller clutch built-in type pulley device provided with a support bearing provided between the inner surface and the outer diameter side member so as to allow relative rotation between the inner diameter side member and the outer diameter side member while supporting a radial load applied to the outer diameter side member in the roller clutch according to claim 1 to 4 Roller clutch built-in type pulley apparatus, characterized in that a roller clutch as set forth in any one of out.

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