JP2015169251A - Rotation transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of a rotation transmission device which controls the engagement and release of a two-way clutch by using an electromagnetic clutch.SOLUTION: A cage 16 of a two-way clutch 10 which is controlled in engagement and the release of the engagement by an electromagnetic clutch 80 is formed of a control cage 16A and a rotation cage 16B, a pocket 42 is formed between adjacent column parts 24, 37 while combining the control cage 16A and the rotation cage 16B so that the column parts 24, 37 which are formed at external peripheral parts of flange parts 23, 36 are alternately aligned in a circumferential direction, and a pair of rollers 15 assembled into the pocket 42 are pressed by the column parts 24, 37 by the relative rotation of the control cage 16A and the rotation cage 16B, and displaced up to an engagement release position. The rotation cage 16B is formed of a cage main body 22 in which the column part 24 is formed at an external periphery of the flange part 23, and a cam ring 28 arranged at one side of the flange part 23 in an axial direction. A cost is reduced with the cage main body 22 as a synthetic resin made molded product, and strength is secured with the cam ring 28 as a metal plate press molded product.

Description

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

  As a rotation transmission device for transmitting and interrupting rotation from an input shaft to an output shaft, a two-way clutch for coupling and releasing the input shaft and the output shaft is provided, and the engagement and release of the two-way clutch are electromagnetic clutches. What is controlled by this is conventionally known.

  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 pillars, and urge the pair of rollers away from each other by an elastic member built in between the opposed parts. Then, it 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 moved to 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.

  In addition, an electromagnetic clutch is provided on the input shaft provided with the inner ring, and the control cage is moved in the axial direction by energizing the electromagnet of the electromagnetic clutch, and between the opposing surfaces of the flange of the control cage and the flange of the rotary cage The control cage and the rotary cage are rotated relative to each other in the direction in which the circumferential width of the pocket is reduced by the action of a torque cam as a motion conversion mechanism provided in the cage. The rotation transmission from the inner ring to the outer ring is cut off.

  In the rotation transmission device, when the energization of the electromagnetic coil of the electromagnetic clutch is released and 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, the rotation is incorporated between the pair of opposed rollers. Since the control retainer and the rotational retainer rotate relative to each other in the direction in which the circumferential width of the pocket increases due to the pressing action of the elastic member, the opposing pair of rollers immediately engage the cylindrical surface and the cam surface. Is extremely small and has excellent responsiveness.

  By the way, in the rotation transmission device described in the above-mentioned Patent Document 1, since each of the rotation cage and the control cage is formed by cutting, it takes time and effort to manufacture, and the cost is high. There were still points to be improved in terms of reduction.

  In order to solve the above problems, in the present applicant, in Patent Document 2, a rotation transmission device in which each of the rotation retainer and the control retainer is used as a press-formed product of a metal plate to reduce costs. Has proposed.

JP 2009-293679 A JP 2013-204764 A

  By the way, in the rotation transmission device described in Patent Document 2, since each of the rotation cage and the control cage is a press-formed product of a metal plate, it is compared with the case where each cage is formed by cutting. The cost can be reduced, but it is necessary to divide the complicated shape part into multiple parts and press-mold them, and the divided parts must be joined together to improve the cost. There are still points to be done.

  An object of the present invention is a machine for a rotation transmission device having a two-way clutch for transmitting and interrupting rotation from an input shaft to an output shaft, and controlling engagement and release of the two-way clutch by an electromagnetic clutch. It is intended to further reduce the cost in a state that secures the desired strength.

  In order to solve the above-described problems, in the present invention, a two-way clutch that transmits and blocks rotation between an input shaft and an output shaft that is arranged coaxially with the input shaft, and the two-way clutch are provided. An electromagnetic clutch for controlling engagement and disengagement, wherein the two-way clutch is between the inner periphery of the outer ring provided at the shaft end of the output shaft and the outer periphery of the inner ring provided at the shaft end of the input shaft. In addition, the pillars provided in the control cage and the rotary cage are assembled so that they are alternately arranged in the circumferential direction, and the inner circumference of the outer ring and the outer circumference of the inner ring are placed in pockets formed between adjacent pillar parts. A pair of engagement elements that can be engaged with each other, and an elastic member that urges the pair of engagement elements in a direction away from each other, and the electromagnetic clutch is coupled to the control retainer. Axis rotor to armature It is configured to oppose an electromagnet to the rotor, apply a magnetic attraction to the armature by energizing the electromagnet and attract it to the rotor, move the control cage in the axial direction by energizing the electromagnet, The control retainer and the rotational retainer are moved relative to each other in the direction in which the circumferential width of the pocket is reduced by the torque cam provided between the opposing surfaces in the axial direction of the retainers, so that the pair of engagement elements are moved inside the outer ring. In the rotation transmission device that is disengaged from the circumference and the outer circumference of the inner ring, the rotation cage includes a cage body in which a plurality of column portions are formed on the outer circumference of an annular flange portion, and the flange portion. It is a cam ring that is abutted against the inner surface and has a cam groove for the torque cam formed on the back side of the abutting surface. The cage body is a synthetic resin molded product. Is a metal plate of the press-molded product, it was adopted a structure coupled integrated with its holder body and the cam ring.

  As described above, the rotating cage is made of two parts, the cage body and the cam ring, the cage body having a complicated shape is made of a synthetic resin, and the cam ring in which the cam groove of the torque cam is formed and the strength is required. By using a press-formed product of a metal plate, the cost can be reduced while maintaining the mechanical strength.

  Here, when the cage main body and the cam ring are coupled and integrated, the cam ring may be insert-molded or bonded to the flange portion of the cage main body. Moreover, you may make it crimp the front-end | tip part of the processus | protrusion inserted in each of the some hole provided in the flange part inner surface of the holder body and formed in the cam ring. Furthermore, each of the plurality of engaging claws formed on the outer peripheral portion of the inner surface of the flange portion of the cage body is fitted to each of the plurality of notches formed on the outer periphery of the cam ring, so that the claw at the tip of the engaging claw It is good also as the coupling | bonding of the snap fit which engages a part with the peripheral part of a notch part.

  In the rotation transmission device according to the present invention, the rotation cage is formed of a cage body made of a resin molded product and a cam ring made of a metal plate press-molded product, but instead of the rotation cage, a control cage is used. A cage body formed with a cylindrical portion fitted in a connecting cylinder formed on the outer periphery of the armature on the outer periphery of an annular flange portion having a plurality of pillar portions on the outer peripheral portion of one side; and one side of the flange portion And a cam ring in which a cam groove of the torque cam is formed on the back side of the abutting surface, the cage body is a synthetic resin molded product, and the cam ring is a metal plate press molded product. The cage body and the cam ring may be combined and integrated. By using both the rotary cage and the control cage as a resin molded product and a metal plate press molded product, the cost of the rotation transmission device can be further reduced.

  When the control cage is formed of a cage body made of synthetic resin and a cam ring made of a metal plate press-molded product, it is made of a metal plate press-molded product on the back side with respect to one side of the flange portion of the cage body. By providing a sliding ring and coupling to the flange portion, by engaging a plurality of engaging claws provided on the outer periphery of the sliding ring with the shaft end surface of the annular projecting portion formed on the outer periphery of the connecting cylinder, The control holder can be firmly connected to the armature.

  In the above control cage with a sliding ring, when the cam ring or sliding ring is coupled to the cage body, the cam ring or sliding ring is insert-molded into the cage body, bonded, or crimped. can do.

  Here, it is preferable to use a resin having high heat resistance, wear resistance, oil resistance, and mechanical strength as the synthetic resin as the material of the cage body. Examples of such resins include polyamide resins such as polyamide 46 (PA46), polyamide 66 (PA66), and polyamide 9T (PA9T), polyether ether ketone resin (PEEK), polyphenylene sulfide resin (PPS), phenol resin, and polybutylene terephthalate. Resin (PBT) can be mentioned.

  In order to further increase the mechanical strength, it is preferable to mix about 30 to 60% of a reinforcing fiber made of glass fiber or carbon fiber as a composite material.

  In the present invention, as described above, the rotating cage is composed of two parts of the cage body and the cam ring, the cage body having a complicated shape is formed of a synthetic resin, and the cam ring that requires strength is provided. By using a press-formed product of a metal plate, it is possible to reduce the cost while maintaining the mechanical strength.

A longitudinal sectional view showing an embodiment of a rotation transmission device according to the present invention Sectional drawing which expands and shows the two-way clutch part of FIG. (A) is sectional drawing along the III-III line of FIG. 1, (b) is sectional drawing which shows the engagement state of a roller. Sectional view along line IV-IV in FIG. Sectional view along line VV in FIG. Sectional view along line VI-VI in FIG. Sectional drawing along the VII-VII line of FIG. Sectional view along line VIII-VIII in FIG. (C) is a sectional view taken along line IX-IX in FIG. 8, (d) is a sectional view showing an operating state. Exploded perspective view of control cage Exploded perspective view of rotating cage The other example of a coupling | bonding means is shown, (a) is a disassembled perspective view which shows the state before the coupling | bonding of a holder main body and a cam ring, (b) is sectional drawing which shows a coupling | bonding state. An exploded perspective view showing still another example of the coupling means Sectional drawing which shows the coupling | bonding state of a cage main body and a cam ring shown in FIG. An exploded perspective view showing still another example of the coupling means Sectional view showing other assembled state of holding plate

  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 an input shaft 1, an output shaft 2 arranged coaxially with the input shaft 1, a housing 3 that covers the shaft ends of both shafts, and the housing 3. The two-way clutch 10 that transmits and shuts off the rotation from the input shaft 1 to the output shaft 2 and the electromagnetic clutch 80 that controls the engagement and release of the two-way clutch 10.

  As shown in FIGS. 1 to 3, the two-way clutch 10 is provided with a cylindrical surface 12 on the inner periphery of the outer ring 11 provided at the shaft end portion of the output shaft 2 and provided at the shaft end portion of the input shaft 1. A plurality of cam surfaces 14 are formed on the outer circumference of the inner ring 13 at equal intervals in the circumferential direction, and a roller 15 and an elastic member 21 as a pair of engagement elements are assembled between each of the plurality of cam surfaces 14 and the cylindrical surface 12, The roller 15 is held by a cage 16, and the rotation of the inner ring 13 is transmitted to the outer ring 11 by engaging one of the pair of rollers 15 with the cylindrical surface 12 and the cam surface 14 by rotating the inner ring 13 in one direction. Further, when the inner ring 13 rotates in the other direction, the other roller 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.

  The housing 3 has a cylindrical shape, and a small-diameter bearing cylinder 4 is provided at one end thereof. A positioning ring 5 is provided on the inner periphery of the bearing cylinder 4, and a bearing 6 that rotatably supports the output shaft 2 is incorporated from the positioning ring 5 to the inner side, and an elastic member 7 is interposed between the bearing 6 and the positioning ring 5. Is incorporated.

  The elastic member 7 includes a two-way clutch 10 and an electromagnetic clutch 80 that controls the engagement and release of the two-way clutch 10 on a retaining ring 8 that is a retaining ring attached to the inner periphery of the other end opening of the housing 3. The electromagnetic clutch 80 is pressed against the retaining ring 8 by energizing the retaining ring 8. For this reason, the built-in component composed of the two-way clutch 10 and the electromagnetic clutch 80 incorporated in the housing 3 is incorporated without rattling.

  As shown in FIG. 1, the outer ring 11 is formed with a small-diameter recess 18 on the inner surface side of the closed end, and a shaft 19 of the input shaft 1 is rotatably supported by a bearing 19 incorporated in the recess 18. Has been.

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

  As shown in FIG. 3, 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 provided between the outer ring 11 and the cylindrical surface 12. Both ends form a narrow wedge-shaped space, and a flat elastic member support surface 20 facing the tangential direction of the inner ring 13 is provided between the pair of inclined surfaces 14a and 14b. The member 21 is supported.

  The elastic member 21 is assembled between the pair of rollers 15 so as to be supported by the elastic member support surface 20, and the pair of rollers 15 is biased by the elastic member 21 in a direction away from each other.

  As shown in FIGS. 1 and 2, the cage 16 includes a control cage 16A and a rotary cage 16B. As shown in FIGS. 2, 6, 7, and 10, the control retainer 16 </ b> A includes a retainer body 22, an annular cam ring 28 provided on one side of the retainer body 22 in the axial direction, and a retainer. It comprises an annular sliding ring 31 provided on the other side in the axial direction of the main body 22.

  The cage body 22 is made of a synthetic resin molded product, and the same number of column portions 24 as the cam surface 14 are provided on the outer peripheral portion of the annular flange portion 23 at equal intervals in the circumferential direction, and an arc shape is formed between adjacent column portions 24. The cylindrical portion 26 is provided on the outer periphery of the flange portion 23 in the direction opposite to the column portion 24, and the annular protrusion 27 is formed on the outer periphery of the end portion on the closed end side of the cylindrical portion 26. It is said that.

  The cam ring 28 is made of a metal plate press-molded product, and is integrally joined to the flange portion 23 of the cage body 22 by insert molding. In order to increase the coupling force, a plurality of holes 29 are formed in the cam ring 28 at intervals in the circumferential direction.

  Similar to the cam ring 28, the sliding ring 31 is made of a press-formed product of a metal plate, and a plurality of connecting claws 32 are provided on the outer periphery at intervals in the circumferential direction. The sliding ring 31 is joined and integrated with the other side surface of the flange portion 23 of the retainer body 22 by insert molding, and each of the plurality of connecting claws 32 is provided on the outer periphery of the flange portion 23 of the retainer body 22. It extends in the axial direction along the outer periphery of the annular protrusion 27.

  In order to increase the coupling force of the sliding ring 31 to the flange portion 23, a plurality of projecting pieces 33 are provided on the inner periphery of the sliding ring 31 corresponding to the pillar portions 24 of the cage body 22. A hole 34 is provided in the continuous portion.

  As shown in FIGS. 2 and 11, the rotary cage 16 </ b> B includes a cage body 35 and a cam ring 38 provided on one side of the cage body 35 in the axial direction. The cage main body 35 is configured such that the same number of column portions 37 as the cam surface 14 are provided on the outer periphery of an annular flange portion 36.

  The cam ring 38 is formed of a metal plate press-molded product, and is integrally joined to one surface of the flange portion 36 of the cage body 35 by insert molding. In order to increase the coupling force, a plurality of holes 39 are formed in the cam ring 38 at intervals in the circumferential direction.

  Here, as a synthetic resin as a forming material of the cage body 22 of the control cage 16A and the cage body 35 of the rotary cage 16B, polyamide 46 (PA46), polyamide 66 (PA66), polyamide 9T (PA9T), etc. Use a resin with high heat resistance, wear resistance, oil resistance and mechanical strength such as polyamide resin, polyether ether ketone resin (PEEK), polyphenylene sulfide resin (PPS), phenol resin, polybutylene terephthalate resin (PBT), etc. Is preferred.

  The control retainer 16A and the rotation retainer 16B are a combination in which the column portions 37 of the rotation retainer 16B are inserted into the elongated holes 25 of the control retainer 16A, and the column portions 24 and 37 are alternately arranged in the circumferential direction. ing. In the combined state, the end portions of the column portions 24 and 37 are disposed between the outer ring 11 and the inner ring 13, and the flange portion 23 of the control cage 16A and the flange portion 36 of the rotary cage 16B are fitted on the outer periphery of the input shaft 1. The integrated support ring 41 is located between the outer ring 11 and the integrated ring.

  By incorporating the cages 16A and 16B as described above, as shown in FIG. 3A, a pocket 42 is formed between the column portion 24 of the control cage 16A and the column portion 37 of the rotary cage 16B. 42 is opposed to the cam surface 14 of the inner ring 13 in the radial direction, and a pair of opposed rollers 15 and an elastic member 21 are incorporated in each pocket 42.

  As shown in FIG. 2, the flange portion 23 of the control holder 16A and the flange portion 36 of the rotation holder 16B are slidably supported along a slide guide surface 43 formed on the outer periphery of the input shaft 1, and the rotation holding is performed. A thrust bearing 44 is incorporated between the flange portion 36 of the vessel 16B and the support ring 41 fitted to the input shaft 1.

  The thrust bearing 44 rotatably supports the rotary cage 16B in a state that prevents the rotary cage 16B from moving toward the electromagnetic clutch 80 side.

  As shown in FIGS. 2 and 6, between the input shaft 1 and the control holder 16A and between the input shaft 1 and the rotary holder 16B, each of the holders 16A and 16B has a pair of opposed rollers 15. There is provided a rotation angle restricting means 50 for preventing further relative rotation in the same direction from the state of being pressed and displaced to the neutral position.

  The rotation angle restricting means 50 is provided with protrusions 51 and 52 on the inner periphery of the cam rings 28 and 38 of the control holder 16A and the rotation holder 16B, and each of the protrusions 51 and 52 is formed on the outer periphery of the input shaft 1. The control retainer 16A is stopped and held at the neutral position by the abutment of the protruding piece 51 against one side surface of the axial groove 53, and is brought into contact with the other side surface of the axial groove 53. The rotation holder 16B is stopped and held at the neutral position.

  As shown in FIG. 2, FIG. 8 and FIG. 9 (c), the axial movement of the control holder 16A is performed between the flange 23 of the control holder 16A and the flange 36 of the rotary holder 16B. A torque cam 60 is provided as a motion conversion mechanism that converts the rotational motion to 16B.

  The torque cam 60 is provided with a pair of opposed cam grooves 61 and 62 that gradually become shallower toward the opposite ends of the cam ring 28 of the control retainer 16A and the cam ring 38 of the rotation retainer 16B. A ball 63 is incorporated between the pair of opposed cam grooves 61 and 62.

  As the cam grooves 61 and 62, grooves having a circular cross section are shown here, but a groove having a V cross section may be used.

  As shown in FIG. 9 (d), the torque cam 60 is configured such that the flange portion 23 of the control retainer 16 </ b> A is rotated from the state where the ball 63 is positioned between one end portion of the cam groove 61 and the other end portion of the cam groove 62. When the control holder 16A moves in the axial direction in a direction approaching the flange portion 36 of 16B, the ball 63 is positioned at the deepest position of the cam grooves 61, 62 as shown in FIG. 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 42 is reduced.

  As shown in FIGS. 2 to 5, the input shaft 1 is provided with a small-diameter shaft portion 65 having a smaller diameter than the inner ring 13 on the other axial side of the inner ring 13, and an annular spring holder 66 is provided on the small-diameter shaft portion 65. It is mated. The spring holder 66 is prevented from rotating by the engagement of a flat portion 67 provided at the inner periphery facing position and a flat surface 68 formed at the outer periphery facing position of the small diameter shaft portion 65.

  Further, the spring holder 66 is prevented from moving in the axial direction by the retaining ring 69 attached to the shaft end portion of the small diameter shaft portion 65 and the other axial side surface of the inner ring 13.

  On the outer peripheral surface of the spring holder 66, a plurality of retaining pieces 70 are formed in each pocket 42 between the column portion 24 of the control retainer 16A and the column portion 37 of the rotation retainer 16B. 70 and the washer 71 fitted to the shaft end of the input shaft 1 are such that the pair of rollers 15 and the elastic member 21 incorporated in the pocket 42 fall off from the cam surface 14 in the axial direction in the axial direction. Is preventing.

Further, the retaining piece 70 is provided with an elastic member holding piece 72 that extends in the axial direction and projects on the outer periphery of the elastic member 21, and the elastic member 21 moves radially outward by the elastic member holding piece 72. Is prevented.

  As shown in FIG. 1, the electromagnetic clutch 80 includes an armature 81 that faces the end face of the cylindrical portion 26 formed in the control retainer 16A in the axial direction, a rotor 82 that faces the armature 81 in the axial direction, and the rotor 82 and an electromagnet 83 opposed in the axial direction.

  The armature 81 is fitted to the outer periphery of the support ring 41 and is rotatably and slidably supported. The armature 81 is connected to the tube portion 26 of the control retainer 16 </ b> A in a connecting tube 84 provided on the outer periphery of the armature 81. The control retainer 16A and the armature 81 are connected and integrated by press-fitting. With this connection, the armature 81 is slidably supported at two locations in the axial direction of the cylindrical outer diameter surface of the support ring 41 and the slide guide surface 43 on the outer periphery of the input shaft 1.

  As shown in FIG. 2, an annular protrusion 85 is provided on the outer periphery of the opening end of the connecting cylinder 84, and the armature is engaged with the connecting claw 32 of the sliding ring 31 on the shaft end surface of the annular protrusion 85. 81 and the control holder 16A are held in a connected state.

  As shown in FIG. 1, the rotor 82 is press-fitted into the input shaft 1, and is positioned by the aforementioned support ring 41 fitted to the input shaft 1 and a spacer 86 incorporated between the support ring 41. ing.

  Here, the support ring 41 has a rectangular cross section and is positioned in the axial direction by a step 45 formed on the other side of the slide guide surface 43 in the input shaft 1 in the axial direction.

  The electromagnet 83 includes an electromagnetic coil 83a and a core 83b that supports the electromagnetic coil 83a. A cylindrical portion 87 is formed on the outer end surface of the core 83b, and a bearing 88 incorporated in the cylindrical portion 87 includes: The retaining ring 89 attached to the inner periphery of the tubular portion 87 is prevented from coming out of the tubular portion 87. The bearing 88 is axially positioned by a step 90 formed on the outer diameter surface of the input shaft 1 and the retaining ring 89, and the electromagnet 83 and the input shaft 1 are relatively rotatable by the bearing 88. ing.

  The rotation transmission device shown in the embodiment has the above-described structure. When the electromagnetic coil 83a of the electromagnet 83 is energized, a magnetic attractive force acts on the armature 81, and the armature 81 moves toward the rotor 82, and FIG. As shown in FIG.

  Here, since the armature 81 is connected and integrated with the control holder 16A, the flange 23 of the control holder 16A is connected to the flange 36 of the rotary holder 16B as the armature 81 moves in the axial direction. Move in the direction of approach.

  At this time, as shown in FIG. 9 (c), the ball 63 shown in FIG. 9 (d) rolls and moves toward the deepest position of the cam grooves 61 and 62, and rotates with the control holder 16A. The cage 16B rotates relative to the direction in which the circumferential width of the pocket 42 decreases against the elastic force of the elastic member 21 shown in FIG. 3, and the pair of opposed rollers 15 rotate with the column portion 24 of the control cage 16A. The retainer 16B is pushed by the pillar portion 37 and moves in a direction approaching each other. Therefore, as shown in FIG. 3A, the roller 15 is disengaged from the cylindrical surface 12 and the cam surface 14 to be in a neutral state, and the two-way clutch 10 is in a disengaged state.

  Further, as shown in FIG. 6, the protruding piece 51 provided on the control holder 16 </ b> A abuts one side surface of the axial groove 53, and the protruding piece 52 provided on the rotation holder 16 </ b> B The control retainer 16A and the rotation retainer 16B are prevented from further rotating in the disengagement direction from the neutral position by contact with the side surface.

  When the inner ring 13 is rotated in one direction by inputting rotational torque to the input shaft 1 in the disengaged state of the two-way clutch 10, the side surface of the axial groove 53 shown in FIG. The control holder 16A and the rotary holder 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.

  When the energization of the electromagnetic coil 83a is released in the free rotation state of the inner ring 13, the armature 81 is released from the suction and becomes rotatable. By releasing the suction, the control holder 16 </ b> A and the rotary holder 16 </ b> B are relatively rotated by the pressing of the elastic member 21 in the direction in which the circumferential width of the pocket 42 is increased.

  Due to the relative rotation of the control holder 16A and the rotary holder 16B, the ball 63 of the torque cam 60 shown in FIG. 9C rolls and moves toward the shallow groove portions of the cam grooves 61 and 62, as shown in FIG. 9D. Thus, the one end of the cam groove 61 of the control holder 16A and the other end of the cam groove 62 of the rotary holder 16B are brought into contact with the ball 63 of the torque cam 60, and the control holder 16A is separated from the rotary holder 16B. The sliding ring 31 moves in the direction of separating and comes into contact with the opening end surface of the outer ring 11.

  Further, as shown in FIG. 3B, each of the pair of opposed rollers 15 is in a standby state where it engages with the cylindrical surface 12 and the cam surface 14, and the inner ring 13 is interposed via one of the pair of opposed rollers 15. Rotational torque in one direction is transmitted between the outer ring 11 and the outer ring 11.

  Here, when the input shaft 1 is stopped and the rotation direction of the input shaft 1 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 83a 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 42 increases, 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.

  As in the rotation transmission device shown in FIGS. 1 and 2, the control retainer 16 </ b> A includes the retainer body 22, the cam ring 28 provided on one side of the retainer body 22 in the axial direction, and the axial direction of the retainer body 22. The sliding ring 31 provided on the other side, the cage main body 22 having a complicated shape is formed of a synthetic resin, the cam groove 61 of the torque cam 60 is formed, and the cam ring 28 and the sliding ring that require strength are required. By combining and integrating 31 in the axial direction as a press-formed product of a metal plate, cost can be reduced while maintaining mechanical strength.

  Further, the rotary cage 16B also requires two strength parts, a cage body 35 and a cam ring 38, a cage body 35 having a complicated shape, and a synthetic resin molded product, and a cam groove 62 of the torque cam 60 is formed to require strength. The cam ring 38 is a metal plate press-molded product, and the cage main body 35 and the cam ring 38 are combined and integrated to reduce the cost while maintaining the mechanical strength in the same manner as the control cage 16B. As a result, the cost of the rotation transmission device can be greatly reduced.

  In FIG. 11, the cam ring 38 is insert-molded when the cage body 35 is molded, and the cam ring 38 is coupled and integrated with the flange portion 36 of the cage body 35. However, the coupling means is not limited to this.

  12 to 14 show other examples of the coupling means. In the coupling means shown in FIG. 12, a plurality of pin-like projections 40 are provided at intervals in the circumferential direction on the flange portion 36 of the cage body 35, and each projection 40 is inserted into a hole 39 formed in the cam ring 38. Thus, the tip of the protrusion 40 is caulked. Reference numeral 40a denotes a caulking projection.

  In the coupling means shown in FIGS. 13 and 14, the plurality of engaging claws 46 formed on the outer peripheral portion of the inner surface of the flange portion 36 of the retainer body 35 are each provided with a plurality of cutout portions 47 formed on the outer periphery of the cam ring 38. , And a claw portion 46 a at the tip of the engaging claw 46 is engaged with the peripheral portion of the cutout portion 47.

  The coupling by caulking shown in FIG. 12 and the coupling by snap fitting shown in FIGS. 13 and 14 can also be employed for coupling the retainer body 22 and the cam ring 28 of the control retainer 16A. FIG. 15 shows an example in which a caulking projection 30 to be inserted into a hole 29 provided in the cam ring 28 is provided on the surface of the flange portion 23 of the cage body 22 of the control cage 16A on the side where the cylinder portion is provided. ing.

  As shown in FIG. 16, a spring holder 66 that restricts the axial direction of the roller 15 and the elastic member 21 is fitted to the shaft end side of the input shaft 1, and the spring holder 66 and the stopper attached to the outer peripheral end of the inner ring 13. When the axial direction of the roller 15 and the elastic member 21 is restricted with the ring 69, the washer 71 shown in FIG. 2 can be eliminated, and the cost can be further reduced.

1 Input shaft 2 Output shaft 10 Two-way clutch 11 Outer ring 13 Inner ring 15 Roller (engagement element)
16A Control cage 16B Rotating cage 21 Elastic member 22 Cage body 23 Flange portion 24 Column portion 26 Tube portion 31 Sliding ring 32 Connecting claw 35 Cage body 36 Flange portion 37 Column portion 38 Cam ring 39 Hole 40 Projection 46 Engagement Claw 47 Notch 60 Torque cam 61 Cam groove 62 Cam groove 63 Ball 80 Electromagnetic clutch 81 Armature 82 Rotor 83 Electromagnet 84 Connecting cylinder 85 Annular protrusion

Claims (9)

A two-way clutch that transmits and blocks rotation between the input shaft and an output shaft that is arranged coaxially with the input shaft, and an electromagnetic clutch that controls engagement and release of the two-way clutch;
The two-way clutch is provided in each of the control cage and the rotary cage between the inner circumference of the outer ring provided at the shaft end portion of the output shaft and the outer circumference of the inner ring provided at the shaft end portion of the input shaft. A pair of engaging elements that can be engaged with the inner periphery of the outer ring and the outer periphery of the inner ring in a pocket formed between adjacent column parts, so as to be alternately arranged in the circumferential direction. It is configured to incorporate an elastic member that urges the pair of engagement elements in the direction of separating,
The electromagnetic clutch has a configuration in which a rotor is opposed to an armature connected to the control holder in an axial direction, an electromagnet is opposed to the rotor, and a magnetic attraction force is applied to the armature by energizing the electromagnet to be attracted to the rotor. And
When the electromagnet is energized, the control cage is moved in the axial direction, and the movement causes the control cage and the rotary cage to move in the circumferential width of the pocket by the torque cam provided between the opposing surfaces in the axial direction of the two cages. In the rotation transmission device in which the pair of engagement elements are disengaged from the inner circumference of the outer ring and the outer circumference of the inner ring by relatively rotating in a direction in which
The rotating cage is abutted against a cage main body having a plurality of pillar portions formed on the outer periphery of an annular flange portion, and an inner surface of the flange portion, and a cam groove of the torque cam is formed on the back side of the abutting surface. The cage body is a synthetic resin molded product, the cam ring is a metal plate press-molded product, and the cage body and the cam ring are combined and integrated. Rotation transmission device.   The rotation transmission device according to claim 1, wherein the means for coupling and integrating the cage body and the cam ring is insert molding or bonding of the cam ring.   The means for coupling and integrating the cage main body and the cam ring is formed by caulking the tip end portion of a protrusion provided on the inner surface of the flange portion of the cage main body and inserted into each of a plurality of holes formed in the cam ring. The rotation transmission device according to 1.   The means for coupling and integrating the cage main body and the cam ring fits each of the plurality of engaging claws formed on the outer peripheral portion of the inner surface of the flange portion to each of the plurality of notches formed on the outer periphery of the cam ring. The rotation transmission device according to claim 1, wherein the claw portion at the tip of the engaging claw is engaged by a snap fit that engages the peripheral portion of the notch portion.   A cage body in which the control cage is formed with a cylindrical portion that is press-fitted into a coupling cylinder formed on the outer periphery of the armature on the outer periphery of an annular flange portion having a plurality of pillar portions on the outer peripheral portion of one side; A cam ring that is abutted against one surface of the flange portion and has a cam groove for the torque cam formed on the back side of the abutting surface, wherein the cage body is a synthetic resin molded product, and the cam ring is a metal plate The rotation transmission device according to any one of claims 1 to 4, wherein the retainer body and the cam ring are coupled by a coupling means. A two-way clutch that transmits and blocks rotation between the input shaft and an output shaft that is arranged coaxially with the input shaft, and an electromagnetic clutch that controls engagement and release of the two-way clutch;
The two-way clutch is provided in each of the control cage and the rotary cage between the inner circumference of the outer ring provided at the shaft end portion of the output shaft and the outer circumference of the inner ring provided at the shaft end portion of the input shaft. A pair of engaging elements that can be engaged with the inner periphery of the outer ring and the outer periphery of the inner ring in a pocket formed between adjacent column parts, so as to be alternately arranged in the circumferential direction. It is configured to incorporate an elastic member that urges the pair of engagement elements in the direction of separating,
The electromagnetic clutch has a configuration in which a rotor is opposed to an armature connected to the control holder in an axial direction, an electromagnet is opposed to the rotor, and a magnetic attraction force is applied to the armature by energizing the electromagnet to be attracted to the rotor. And
When the electromagnet is energized, the control cage is moved in the axial direction, and the movement causes the control cage and the rotary cage to move in the circumferential width of the pocket by the torque cam provided between the opposing surfaces in the axial direction of the two cages. In the rotation transmission device in which the pair of engagement elements are disengaged from the inner circumference of the outer ring and the outer circumference of the inner ring by relatively rotating in a direction in which
A retainer body in which a cylinder portion press-fitted into a connecting cylinder formed on an outer periphery of the armature is formed on the outer periphery of an annular flange portion having a plurality of column portions on an outer peripheral portion on one side; It comprises a cam ring which is abutted against one surface of the flange portion, and a cam groove for the torque cam is formed on the back side with respect to the abutting surface, the retainer body is a synthetic resin molded product, and the cam ring is a metal plate A rotation transmission device, characterized in that it is a press-molded product, and its cage body and cam ring are combined and integrated.   A sliding ring made of a metal plate press-molded product is provided on the back side of one side of the flange portion of the cage body, and is coupled to the flange portion, and a plurality of engaging claws provided on the outer periphery of the sliding ring are The rotation transmission device according to claim 6, wherein the rotation transmission device is engaged with a shaft end surface of an annular projecting portion formed on an outer periphery of the connecting cylinder.   The rotation transmission device according to any one of claims 1 to 7, wherein the synthetic resin is a kind of a polyamide resin, a polyether ether ketone resin, a polyphenylene sulfide resin, a phenol resin, or a polybutylene terephthalate resin.   The rotation transmission device according to claim 8, wherein the synthetic resin is made of a fiber reinforced synthetic resin having glass fiber or carbon fiber as a composite material.

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