JP2013087811A - Rotation transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce weight of a rotation transmission device by compactifying the axial length of an outer ring.SOLUTION: A pocket is formed between adjacent pillars to allow a pair of rollers 15 built in the pocket to be pushed by the pillars as a result of a relative rotation between a controlling retainer 16A and a rotation retainer 16B and thereby be moved to an engagement releasing position. Pillars 25, 29 of the controlling retainer 16A and rotation retainer 16B are arranged between an outer ring 11 and an inner ring 13 to scheme an assembly of arranging flanges 24, 28 outside the outer ring 11, thus compactifying the axial length of the outer ring 11 and reducing the weight of the device. The other end of a housing 1 is inward swaged to allow a swaged piece 6 to prevent an electromagnet 53 of an electromagnetic clutch 50 from disengaging. Further, the outer ring 11 and the electromagnet 53 are fixed in such a manner as to be pressed toward a positioning ring 3 formed in an inner periphery of one end of the housing 1, thereby eliminating backlash of integrated parts incorporated in the housing 1.

Description

  The present invention relates to a rotation transmission device capable of switching between rotation transmission and cutoff.

  2. Description of the Related Art Conventionally, a rotation transmission device that transmits and blocks rotation from a drive shaft to a driven shaft has a two-way clutch, and the engagement and release of the two-way clutch are controlled by an electromagnetic clutch. It has been.

  In the rotation transmission device described in Patent Document 1, a control cage and a rotation cage are alternately arranged between an outer ring and an inner ring incorporated therein, and pillar portions formed in each cage are alternately arranged in the circumferential direction. Assemble the pair of rollers in a pocket formed between adjacent column parts, and urge the pair of rollers in a direction away from each other by an elastic member incorporated between the opposed parts. The roller is put on standby at a position where it engages with the cylindrical surface formed on the inner periphery of the outer ring and the cam surface formed on the outer periphery of the inner ring, and one roller is engaged with the cylindrical surface and the cam surface by rotating the inner ring in one direction. The rotation of the inner ring is transmitted to the outer ring.

  Further, an electromagnetic clutch is provided on the input shaft connected to the inner ring, and the control cage is moved in the axial direction by the electromagnetic clutch, and is provided between the opposing surfaces of the flange of the control cage and the rotary cage. The control retainer and the rotational retainer are relatively rotated in the direction in which the circumferential width of the pocket is reduced by the action of the torque cam, and the pair of rollers are moved to the disengagement position by the pillar portion of each retainer. The rotation transmission to is cut off.

  In the rotation transmission device, when the control cage is moved in a direction in which the flange of the control cage is separated from the flange of the rotation cage by the electromagnetic clutch, the rotation is controlled by the pressing action of the elastic member incorporated between the pair of opposed rollers. The cage and rotating cage rotate relative to each other in the direction of increasing the circumferential width of the pocket, and the pair of opposed rollers immediately engage the cylindrical surface and cam surface. It has the feature of being.

JP 2009-293679 A

  By the way, in the rotation transmission device described in the above-mentioned Patent Document 1, since the entire control cage and the rotation cage are accommodated in the outer ring, an outer ring having a long axial length is required and the weight is also increased. However, there are still points to be improved in reducing the weight.

  In the rotation transmission device as described above, the two-way clutch formed by the outer ring, the inner ring, the pair of rollers, and the cage and the electromagnetic clutch that controls the two-way clutch are covered with the housing. If the two-way clutch and the electromagnetic clutch are rattled in a state where the two-way clutch or the electromagnetic clutch is assembled in the housing, the two-way clutch cannot be controlled with high accuracy.

  In order to eliminate such inconvenience, conventionally, rattling is removed by shim adjustment in which a shim is incorporated between opposing portions of a housing and a built-in component composed of a two-way clutch and an electromagnetic clutch incorporated therein. Yes. However, the shim adjustment requires several kinds of shims with different thicknesses to be assembled while being sequentially replaced, which is a very time-consuming work, and there are still points to be improved in order to improve the assemblability. It was.

  In addition, after adjusting the shim, a retaining ring was installed in the opening at the other end of the housing to prevent the built-in parts from being pulled out. This requires a shim and retaining ring, which increases the number of parts and increases the cost. The point which should be improved also in reducing this is left.

  An object of the present invention is to reduce the weight of the rotation transmission device by reducing the axial length of the outer ring, to improve the assemblability by eliminating the need for shim adjustment work to remove backlash, The cost is reduced by reducing the number of points.

  In order to solve the above-described problems, in the present invention, a cylindrical surface is formed on one of the inner periphery of the outer ring and the outer periphery of the inner ring incorporated on the inner side, and on the other end in the circumferential direction between the cylindrical surface. A plurality of cam surfaces that form a narrow wedge space are provided at intervals in the circumferential direction, and a pair of rollers facing each of the wedge spaces formed between the plurality of cam surfaces and the cylindrical surface, The retainer for holding each of the pair of opposed rollers is composed of a control retainer and a rotational retainer, and both retainers are formed of an annular flange. A plurality of pillar parts are formed on the outer peripheral part at intervals in the circumferential direction, and both the cages are a combination in which the flanges face each other in the axial direction and the pillar parts are alternately arranged in the circumferential direction. Between the adjacent pillars A pocket for accommodating a pair of opposed rollers and an elastic member is formed, and the control retainer is arranged between the flanges of the control retainer and the flange of the rotary retainer in a direction in which the distance between the opposed flanges is reduced. Provided with a torque cam that relatively rotates a pair of cages in a direction in which the circumferential width of the pocket is reduced by movement of the pocket, and has an electromagnet on the input shaft having the inner ring at the shaft end, and the control is performed by energizing the electromagnet. An electromagnetic clutch that moves the cage in the axial direction is provided, and a cylindrical part is provided on the outer end surface of the core of the electromagnet, and the electromagnet and the input shaft are rotatably supported by a bearing built into the cylindrical part. In the apparatus, the control retainer and the rotational retainer are arranged such that the pillar portion is disposed between the outer ring and the inner ring, and the flanges facing each other in the axial direction are the opening end surface of the outer ring. A positioning ring that prevents the outer ring from moving toward the one end opening side of the housing is provided on the inner periphery of one end of the cylindrical housing that covers the entire outer ring and the electromagnetic clutch. The other end portion is provided with an inward caulking piece that engages with the outer peripheral portion of the outer end surface of the electromagnet and fixes the core and the outer ring while being pushed toward the positioning ring.

  Here, the caulking piece may be caulked with the other end of the housing facing inward in the radial direction, or the inner peripheral portion of the large-diameter recess formed in the inner periphery of the other end of the housing. It may be formed by caulking inward in the radial direction.

  Further, the crimping piece may be an annular shape that is formed by all-around crimping that crimps the entire circumferential direction and is continuous in the circumferential direction, or by partial crimping that partially crimps the circumferential direction. A plurality of protrusions that are formed and are discontinuous in the circumferential direction may be used.

  As described above, the control retainer and the rotation retainer are incorporated between the outer ring and the inner ring so that the axially opposing flange is disposed between the outer ring and the armature. The axial length of the outer ring can be made compact as compared with the case of incorporating the housing.

  Further, by providing an inward crimping piece at the other end of the housing and fixing the core and outer ring in a state of being pushed toward the positioning ring, it is possible to eliminate rattling of built-in components incorporated in the housing.

  This eliminates the need for shim adjustment work and facilitates assembly of the rotation transmission device. Furthermore, since it is possible to eliminate the need for attaching an adjustment shim and a retaining ring for retaining the electromagnet, the number of parts can be reduced and the cost can be reduced.

  Here, the bearing is retained by providing an inward crimping piece that engages with the outer end surface of the bearing and retains the bearing at the end of the cylindrical portion provided on the outer end surface of the core. The retaining ring need not be attached, and the cost can be further reduced by further reducing the number of parts.

  In the present invention, as described above, the control retainer and the rotation retainer are incorporated so that the axially opposed flanges are disposed between the outer ring and the armature, thereby reducing the axial length of the outer ring. Weight reduction can be achieved and a lightweight rotation transmission device can be obtained.

  In addition, by providing an inward crimping piece at the other end of the housing and fixing the core and outer ring in a state of being pushed toward the positioning ring, it is possible to eliminate rattling of built-in components incorporated in the housing. Shim adjustment is unnecessary, and assembly of the rotation transmission device can be facilitated.

  Furthermore, since it is not necessary to attach a retaining ring for retaining the shim and the electromagnet, the number of parts can be reduced and the cost can be reduced.

Longitudinal front view showing an embodiment of a rotation transmission device according to the present invention Sectional view along the line II-II in FIG. Sectional view along line III-III in FIG. Sectional view along line IV-IV in FIG. Sectional view along line V-V in FIG. (A) is sectional drawing along the VI-VI line of FIG. 5, (b) is sectional drawing which shows an operation state. Longitudinal front view showing another embodiment of the rotation transmission device according to the present invention Longitudinal front view showing still another embodiment of the rotation transmission device according to the present invention Another example of caulking is shown, (a) is a cross-sectional view showing a state before caulking, and (b) is a cross-sectional view showing a state after caulking.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a rotation transmission device according to the present invention. As shown in the figure, the rotation transmission device includes a housing 1, a two-way clutch 10 housed in the housing 1, and an electromagnetic clutch 50 that controls engagement and release of the two-way clutch 10.

  The housing 1 has a cylindrical shape, and a small-diameter bearing cylinder 2 is provided at one end thereof. A positioning ring 3 is provided on the inner periphery of the bearing tube 2.

  As shown in FIGS. 1 and 2, the two-way clutch 10 is provided with a cylindrical surface 12 on the inner circumference of the outer ring 11, and a plurality of cam surfaces 14 are arranged on the outer circumference of the inner ring 13 incorporated inside the outer ring 11 in the circumferential direction. A pair of rollers 15 is assembled between each of the plurality of cam surfaces 14 and the cylindrical surface 12 and the rollers 15 are held by a retainer 16, and a pair of rollers 15 is rotated by rotating the inner ring 13 in one direction. One of the rollers 15 is engaged with the cylindrical surface 12 and the cam surface 14 to transmit the rotation of the inner ring 13 to the outer ring 11, and when the inner ring 13 is rotated in the other direction, the other roller 15 is moved to the cylindrical surface 12 and the cam surface. 14, the rotation of the inner ring 13 is transmitted to the outer ring 11.

  Here, as shown in FIG. 1, the outer ring 11 has a closed end, and an output shaft 17 is provided at the closed end, and the output shaft 17 is supported by a bearing 4 incorporated in the bearing cylinder 2 of the housing 1. It is supported rotatably.

  The outer ring 11 is formed with a small-diameter recess 18 on the inner surface side of the closed end, and an input shaft 22 having the inner ring 13 at the shaft end is rotatably supported by a bearing 19 incorporated in the recess 18. Yes.

  FIG. 1 shows an example in which the inner ring 13 is integrally provided at the end of the input shaft 22, but the inner ring 13 is separated from the input shaft 22 as shown in FIG. The shaft end portion of the input shaft 22 may be fitted inside, and the inner ring 13 and the input shaft 22 may be connected and integrated by serrations 36 formed between the fitting surfaces.

  As shown in FIG. 2, the cam surface 14 formed on the outer periphery of the inner ring 13 is formed of a pair of inclined surfaces 14 a and 14 b that are inclined in opposite directions, and is circumferentially disposed between the outer ring 11 and the cylindrical surface 12. Both ends form a narrow wedge-shaped space, and a flat spring support surface 20 facing the tangential direction of the inner ring 13 is provided between the pair of inclined surfaces 14a and 14b. Is supported.

  In FIG. 4, a rectangular coil spring having a circular cross section is shown as the elastic member 21, but the elastic member 21 is not limited to this. As shown in FIG. 2, the elastic member 21 is incorporated between the pair of rollers 15 so as to be supported by the support surface 20, and the pair of rollers 15 is urged away by the elastic member 21. ing.

  As shown in FIG. 1, the cage 16 includes a control cage 16A and a rotary cage 16B. As shown in FIGS. 1 and 5, the control retainer 16 </ b> A is provided with the same number of column portions 25 as the cam surface 14 on the outer peripheral portion of one surface of the annular flange 24 at equal intervals in the circumferential direction, and between the adjacent column portions 25. An arc-shaped long hole 26 is formed in the outer periphery, and a cylindrical portion 27 is provided on the outer periphery in a direction opposite to the column portion 25.

  On the other hand, the rotary cage 16B is configured such that the same number of column portions 29 as the cam surface 14 are provided at equal intervals in the circumferential direction on the outer periphery of the annular flange 28.

  The control retainer 16A and the rotation retainer 16B are a combination in which the column portions 29 of the rotation retainer 16B are inserted into the elongated holes 26 of the control retainer 16A, and the column portions 25 and 29 are alternately arranged in the circumferential direction. ing. In the combined state, the end portions of the column portions 25 and 29 are disposed between the outer ring 11 and the inner ring 13, and the flange 24 of the control retainer 16 </ b> A and the flange 28 of the rotation retainer 16 </ b> B are fitted to the outer periphery of the input shaft 22. Further, it is built in between the support ring 30 and the outer ring 11.

  By incorporating the cages 16A and 16B as described above, as shown in FIG. 2, a pocket 31 is formed between the column portion 25 of the control cage 16A and the column portion 29 of the rotary cage 16B. The pair of rollers 15 and the elastic member 21 are incorporated in each pocket 31 so as to face the 13 cam surfaces 14 in the radial direction.

  As shown in FIG. 1, the flange 24 of the control holder 16A and the flange 28 of the rotary holder 16B are slidably supported along a slide guide surface 32 formed on the outer periphery of the input shaft 22, and the rotary holder 16B. A thrust bearing 33 is incorporated between the flange 28 and the support ring 30 of the input shaft 22.

  As shown in FIGS. 1, 5 and 6B, a torque cam 40 is provided between the flange 24 of the control holder 16A and the flange 28 of the rotary holder 16B. The torque cam 40 is provided with a pair of opposed cam grooves 41 and 42 that gradually become shallower toward the opposite ends of the flange 24 of the control retainer 16A and the flange 28 of the rotation retainer 16B. The ball 43 is incorporated between one end of the cam groove 41 and the other end of the other cam groove 42.

  The cam grooves 41 and 42 are arc-shaped grooves here, but may be V-grooves.

  When the control holder 16A moves in the axial direction in the direction in which the flange 24 of the control holder 16A approaches the flange 28 of the rotary holder 16B, the torque cam 40 has a ball 43 as shown in FIG. Rolls toward the deepest groove depth of the cam grooves 41 and 42, and the control holder 16A and the rotary holder 16B are rotated relative to each other in the direction in which the circumferential width of the pocket 31 is reduced. .

  As shown in FIGS. 3 and 4, a small-diameter cylindrical surface 45 is formed on the other axial side of the cam surface 14 formed on the inner ring 13, and an annular holding plate 46 is fitted to the cylindrical surface 45. It is fixed to the inner ring 13.

  On the outer peripheral surface of the holding plate 46, a plurality of detent pieces 47 disposed in the respective pockets 31 between the column portion 25 of the control holder 16A and the column portion 29 of the rotary holder 16B are formed.

  When the control retainer 16A and the rotation retainer 16B rotate relative to each other in the direction of reducing the circumferential width of the pocket 31, the plurality of detent pieces 47 are connected to the column portion 25 of the control retainer 16A and the rotation retainer 16B. The column portion 29 is received at both side edges to hold the pair of opposed rollers 15 in a neutral position.

  On the outer periphery of the holding plate 46, spring pressing arms 48 are provided to project to the outer diameter sides of the plurality of elastic members 21, and the elastic pressing members 48 escape to the outer diameter side between the pair of rollers 15 by the spring pressing arms 48. It is prevented from coming out.

  As shown in FIG. 1, the electromagnetic clutch 50 includes an armature 51 that faces the end face of the cylindrical portion 27 formed in the control retainer 16A in the axial direction, a rotor 52 that faces the armature 51 in the axial direction, and the rotor 52 and an electromagnet 53 facing in the axial direction.

  The armature 51 is fitted to the outer periphery of the support ring 30 of the input shaft 22 and is rotatably and slidably supported. The armature 51 is provided in the connecting cylinder 55 provided on the outer periphery of the armature 51. The cylindrical portion 27 is press-fitted, and the control holder 16A and the armature 51 are connected and integrated. With this connection, the armature 51 is slidably supported at two locations in the axial direction of the cylindrical outer diameter surface 54 of the support ring 30 and the slide guide surface 32 on the outer periphery of the input shaft 22.

  The rotor 52 is press-fitted into the input shaft 22, and a shim 56 is incorporated between the rotor 52 and the support ring 30.

  Here, the support ring 30 is positioned in the axial direction by a step portion 34 formed on the other side in the axial direction of the slide guide surface 32 of the input shaft 22, and a shim 56 is interposed between the support ring 30 and the rotor 52. By incorporating the rotor 52, the rotor 52 is positioned in the axial direction.

  The support ring 30 is made of a nonmagnetic material. The nonmagnetic material may be a nonmagnetic metal or a resin.

  As shown in FIG. 1, the electromagnet 53 includes an electromagnetic coil 53a and a core 53b that supports the electromagnetic coil 53a. A cylindrical portion 57 is formed on the outer end surface of the core 53b. The built-in bearing 58 is prevented from coming out of the cylindrical portion 57 by a retaining ring 59 attached to the inner periphery of the cylindrical portion 57. The bearing 58 is positioned in the axial direction by a step portion 60 formed on the outer diameter surface of the input shaft 22 and the retaining ring 59, and the electromagnet 53 and the input shaft 22 are relatively rotatable by the bearing 58. ing.

  The other end of the housing 1 is caulked inward, and the caulking piece 6 engages with the outer end surface of the core 53b to prevent the core 53b from being pulled out. Further, the crimping piece 6 holds the outer ring 11 and the core 53b in a fixed state in a state in which the bearing 4 that rotatably supports the outer ring 11 is pressed against the positioning ring 3.

  In FIG. 1, the other end of the housing 1 is crimped inward over the entire circumferential direction to form an annular crimping piece 6 that is continuous in the circumferential direction. It is good also as the crimping piece 6 of the protruding piece shape discontinuous in the circumferential direction by crimping.

  The rotation transmission device shown in the embodiment has the above-described structure, and FIG. 1 shows a cut-off state of the electromagnet 53 with respect to the electromagnetic coil 53a, and the armature 51 is separated from the rotor 52. Further, as shown in FIG. 2, the pair of opposed rollers 15 of the two-way clutch 10 are positioned at a standby position where they engage with the cylindrical surface 12 of the outer ring 11 and the cam surface 14 of the inner ring 13. In FIG. 1, the armature 51 and the rotor 52 are shown in close contact with each other, but there is actually a gap between them.

  When the electromagnetic coil 53 a is energized in the standby state of the two-way clutch 10, an attractive force acts on the armature 51, and the armature 51 moves in the axial direction and is attracted to the rotor 52.

  Here, since the armature 51 is connected and integrated with the control holder 16A, the flange 24 of the control holder 16A approaches the flange 28 of the rotary holder 16B as the armature 51 moves in the axial direction. Move in the direction.

  At this time, as shown in FIG. 6 (a), the ball 43 shown in FIG. 6 (b) rolls and moves toward the deepest groove depth of the cam grooves 41 and 42, and rotates and holds the control holder 16A. The container 16B relatively rotates in the direction in which the circumferential width of the pocket 31 is reduced, and the pair of opposed rollers 15 shown in FIG. 2 are pushed by the column part 25 of the control holder 16A and the column part 29 of the rotation holder 16B, so Move in the direction of approach. For this reason, the roller 15 is disengaged from the cylindrical surface 12 and the cam surface 14 to become a neutral state, and the two-way clutch 10 is disengaged.

  In the disengaged state of the two-way clutch 10, when rotational torque is input to the input shaft 22 and the inner ring 13 is rotated in one direction, the detent piece 47 formed on the holding plate 46 becomes the column portion 25 of the control cage 16 </ b> A. In order to press one of the column portions 29 of the rotary cage 16B, the control cage 16A and the rotary cage 16B rotate together with the inner ring 13. At this time, since the pair of opposed rollers 15 is held in the neutral position where the engagement is released, the rotation of the inner ring 13 is not transmitted to the outer ring 11 and the inner ring 13 rotates freely.

  Here, when the control holder 16A and the rotary holder 16B are relatively rotated in a direction to reduce the circumferential width of the pocket 31, the column part 25 of the control holder 16A and the column part 29 of the rotary holder 16B are The amount of relative rotation is regulated by coming into contact with both side edges of the rotation stopper piece 47.

  For this reason, the elastic member 21 will not shrink more than necessary, and even if it is repeatedly expanded and contracted, it will not be damaged by fatigue.

  When the energization of the electromagnetic coil 53a is released in the free rotation state of the inner ring 13, the armature 51 is released from the suction. Due to the release of the suction, the elastic retainer 21 presses the control retainer 16A and the rotational retainer 16B relative to each other in the direction in which the circumferential width of the pocket 31 increases, and each of the pair of opposed rollers 15 is as shown in FIG. In addition, a standby state is established in which the cylindrical surface 12 and the cam surface 14 are engaged, and a unidirectional rotational torque is transmitted between the inner ring 13 and the outer ring 11 via one of the pair of opposed rollers 15.

  Here, when the input shaft 22 is stopped and the rotation direction of the input shaft 22 is switched, the rotation of the inner ring 13 is transmitted to the outer ring 11 via the other roller 15.

  As described above, when the energization of the electromagnetic coil 53a is interrupted, the control holder 16A and the rotary holder 16B rotate relative to each other in the direction in which the circumferential width of the pocket 31 is increased, and each of the pair of opposed rollers 15 has the cylindrical surface 12. Further, since the standby state in which the cam surface 14 is immediately engaged is set, the rotation direction play is small, and the rotation of the inner ring 13 can be immediately transmitted to the outer ring 11.

  Further, since the rotational torque is transmitted from the inner ring 13 to the outer ring 11 through the same number of rollers 15 as the cam surface 14, a large rotational torque can be transmitted from the inner ring 13 to the outer ring 11.

  When the control retainer 16A and the rotation retainer 16B are relatively rotated in the direction in which the circumferential width of the pocket 31 is increased, the ball 43 rolls and moves toward the shallow groove portion of the pair of opposed cam grooves 41 and 42. The state shown in FIG.

  In the embodiment shown in FIG. 1, the control retainer 16 </ b> A and the rotation retainer 16 </ b> B are configured such that the pillar portions 25 and 29 are positioned between the outer ring 11 and the inner ring 13, and the flanges 24 and 28 that are opposed in the axial direction are Since it is incorporated between the armatures 51, the axial length of the outer ring 11 can be reduced in size and weight.

  Further, the connecting cylinder 55 provided on the armature 51 and the cylinder part 27 formed on the outer peripheral part of the flange of the control retainer 16A are integrated as press-fitting, and the inner diameter surface of the armature 51 is fitted to the input shaft 22. The support ring 30 is slidably supported by the cylindrical outer diameter surface, and the flange inner diameter surface of the control retainer 16A is movably supported by the slide guide surface 32 formed on the outer periphery of the input shaft 22. The armature 51 can always be held parallel to the rotor 52, and the armature 51 can be reliably magnetically attracted to the rotor 52 by energizing the electromagnet 53. For this reason, engagement and disengagement of the roller 15 can be accurately performed.

  As shown in the embodiment, by forming the support ring 30 fitted to the input shaft 22 with a nonmagnetic material, it is possible to prevent magnetic flux from leaking from the armature 51 to the input shaft 22. Can be adopted.

  As in the embodiment shown in FIG. 1, an inward caulking piece 6 is provided at the other end of the housing 1, and the bearing 4 that rotatably supports the outer ring 11 is pressed against the positioning ring 3 by the caulking piece 6. By holding the outer ring 11 and the core 53b in a fixed state in this state, it is possible to eliminate backlash of the built-in components including the two-way clutch 10 and the electromagnetic clutch 50 incorporated in the housing 1.

  This eliminates the need for shim adjustment to eliminate backlash by attaching the shim, which is conventionally required, and facilitates assembly of the rotation transmission device. Moreover, since it is possible to eliminate the need for attaching an adjustment shim or a retaining ring for retaining the electromagnet 53, the number of parts can be reduced and the cost can be reduced.

  FIG. 8 shows another embodiment of the rotation transmission device according to the present invention. In this embodiment, an inward caulking piece 61 that engages with the outer end surface of the bearing 58 and prevents the bearing 58 from being attached to the end portion of the cylindrical portion 57 provided on the outer end surface of the core 53b. This is different from the rotation transmission device shown in FIG.

  As described above, the retaining ring 59 for retaining the bearing shown in FIG. 1 can be dispensed with by providing the inward crimping piece 61 at the end of the cylindrical portion 57 and retaining the bearing 58. The cost can be further reduced by reducing the number of parts.

  In FIG. 1, the crimping piece 6 is formed by caulking the other end of the housing 1 inward in the radial direction. However, as shown in FIG. 9A, a large-diameter recess is formed on the inner periphery of the other end of the housing 1. 70, and the inner peripheral portion of the closed end face of the large-diameter recess 70 is crimped with a crimping jig T so as to provide a crimping piece 6 facing radially inward as shown in FIG. 9B. It may be.

  In this case, the closed end surface of the large-diameter recess 70 may be crimped over the entire circumferential direction, and the crimping piece 6 may be an annular one that is continuous in the circumferential direction, or the inner peripheral portion of the closed end surface of the large-diameter recess 70 May be partially crimped, and the crimping piece 6 may be formed in a protruding piece shape discontinuous in the circumferential direction.

DESCRIPTION OF SYMBOLS 1 Housing 2 Bearing cylinder 3 Positioning ring 5 Elastic member 6 Clamping piece 11 Outer ring 12 Cylindrical surface 13 Inner ring 14 Cam surface 15 Roller 16A Control retainer 16B Rotation retainer 21 Elastic member 22 Input shaft 24 Flange 25 Column 28 Flange 29 Column Part 31 pocket 40 torque cam 50 electromagnetic clutch 51 armature 52 rotor 53 electromagnet 53a electromagnetic coil 53b core 57 cylindrical part 58 bearing 61 caulking piece 70 large diameter recess

Claims (6)

A plurality of cam surfaces that form a cylindrical surface on one of the inner periphery of the outer ring and the outer periphery of the inner ring that is incorporated inside the outer ring, and that form a narrow wedge space between the cylindrical surface and the other end in the circumferential direction. A pair of opposed rollers in each of the wedge spaces formed between the plurality of cam surfaces and the cylindrical surface, and an elastic member that urges the opposed pair of rollers away from each other The retainer that holds each of the pair of opposed rollers is composed of a control retainer and a rotational retainer. The two cages are configured such that the flanges face each other in the axial direction and the pillar parts are alternately arranged in the circumferential direction, and the pair of opposed rollers between adjacent pillar parts. And a member in which the elastic member is accommodated. A pocket is formed between the opposed surfaces of the flange of the control cage and the flange of the rotary cage, and the circumferential width of the pocket is reduced by the movement of the control cage in a direction in which the distance between the opposed flanges is reduced. An electromagnetic clutch that has a torque cam that relatively rotates a pair of cages in a certain direction, has an electromagnet on an input shaft having the inner ring at the shaft end, and moves the control cage in the axial direction by energizing the electromagnet In the rotation transmission device in which the cylindrical portion is provided on the outer end surface of the core of the electromagnet, and the electromagnet and the input shaft are relatively rotatably supported by a bearing incorporated in the cylindrical portion.
The control retainer and the rotation retainer are built-in in which a column portion is disposed between the outer ring and the inner ring, and a flange that is opposed in the axial direction is disposed between the opening end surface of the outer ring and the armature, and the outer ring and the electromagnetic clutch A positioning ring that prevents the outer ring from moving toward the one end opening side of the housing is provided on the inner periphery of one end of the cylindrical housing that covers the whole, and the other end of the housing is engaged with the outer periphery of the outer end surface of the electromagnet. An inward crimping piece for fixing the core and the outer ring in a state of being pushed toward the positioning ring is provided.   The rotation transmission device according to claim 1, wherein the caulking piece is formed by caulking the other end of the housing inward in the radial direction.   The rotation transmission device according to claim 1, wherein the caulking piece is formed by caulking inward in a radial direction of an inner peripheral portion of a large-diameter concave portion formed in an inner periphery of the other end portion of the housing.   The rotation transmission device according to any one of claims 1 to 3, wherein the crimping piece is formed by full-circular caulking for caulking the entire circumferential direction and has an annular shape that is continuous in the circumferential direction.   The rotation transmission according to any one of claims 1 to 3, wherein the caulking piece is formed by partial caulking that partially caulks in the circumferential direction and has a plurality of discontinuous protrusions in the circumferential direction. apparatus.   The rotation transmission device according to any one of claims 1 to 5, wherein an inward caulking piece that engages with an outer end face of the bearing and prevents the bearing is provided at an end of the cylindrical portion. .

Images