JP2013257001A - Rotation transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate handling of a rotation transmission device which controls engagement and release of a two-way clutch by an electromagnetic clutch.SOLUTION: In an electromagnet 53 of an electromagnetic clutch 50 for controlling engagement and engagement-release of a two-way clutch, a male connector 70 to which a female connector 74 provided to an end of a power supply code 73 is connected is provided, so that leading of a lead wire is not required and handling is facilitated.

Description

  The present invention relates to a rotation transmission device used for switching rotation transmission and switching.

  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 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.

  Further, 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 the electromagnetic clutch, and is provided between the opposing surfaces of the flange of the control cage and the flange of 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, although not shown in the drawing, the entire two-way clutch and the electromagnetic clutch are covered with a housing, and lead wires are attached to the electromagnetic coils of the electromagnet forming the electromagnetic clutch. The lead wire is connected to the outside of the housing, and a male connector into which the female connector connected to the end of the power cord is inserted and removed is provided at the end.

  In this case, since the lead wire is exposed to the outside, when assembling the rotation transmission device to the equipment, the lead wire may be caught in other parts provided in the periphery, and may be disconnected. However, there is still a point to be improved in facilitating the handling.

  An object of the present invention is to provide an easy-to-handle rotation transmission device that does not require a lead wire for supplying electricity to an electromagnet of an electromagnetic clutch.

  In order to solve the above-described problems, in the present invention, a two-way clutch that transmits and blocks rotation from an input shaft to an output shaft that is arranged coaxially with the input shaft, and engagement of the two-way clutch And an electromagnetic clutch for controlling release, the electromagnetic clutch being supported so as to be movable in the axial direction of the input shaft, a rotor facing the armature in the axial direction, and facing the rotor in the axial direction The electromagnetic clutch includes a yoke having an annular groove formed on the surface thereof and an electromagnetic coil incorporated in the annular groove of the yoke, and the armature is attracted to the rotor by energizing the electromagnetic coil. In the rotation transmission device in which the two-way clutch is disengaged by the electric magnet, the electromagnet is provided at a terminal portion of the power cord. Female connector provided the male connector removable for is a spigot which the female connector of the male connector is inserted and removed for employing the configuration provided on the back side of the rotor facing surfaces of the yoke.

  As described above, by providing the electromagnet with the male connector to which the female connector provided at the terminal portion of the power cord can be attached and detached, the lead wire can be made unnecessary. Here, if there is a lead wire, it will be caught and obstruct the assembly of the rotation transmission device, but since there is no lead wire, a rotation transmission device that is easy to handle can be obtained.

  In the rotation transmission device according to the present invention, when the engaged portion provided to the male connector is snap-fitted with the engaging portion provided on the female connector, a reliable connection state is established between the male connector and the female connector. Can be obtained.

  Further, the male connector can be easily formed by covering the entire electromagnetic coil with a resin-molded housing and molding the male connector simultaneously with the molding of the housing. In this case, a connector insertion hole is provided in the closed end wall of the annular groove formed in the yoke, and the housing is fitted into the annular groove so that the male connector is inserted into the connector insertion hole, and is prevented from being removed.

  When retaining the housing, the housing can be easily retained by adopting a method of crimping or bonding the opening of the annular groove.

  In the present invention, as described above, since the male connector for connecting the female connector provided at the terminal portion of the power cord is provided on the electromagnet, the lead wire can be made unnecessary. Can be facilitated.

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. (C) is a sectional view taken along line VII-VII in FIG. 6, and (d) is a sectional view showing an operating state. Enlarged sectional view of the electromagnet shown in FIG. Connector exploded perspective view Sectional drawing which shows the other example of retaining in the housing which molds an electromagnetic coil

  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 50 that controls the engagement and release of the two-way clutch 10.

  The housing 3 has a cylindrical shape, and a small-diameter bearing cylinder 4 is provided at one end thereof, and the output shaft 2 is rotatably supported by a bearing 5 incorporated in the bearing cylinder 4.

  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 at equal intervals in the circumferential direction on the outer periphery of the inner ring 13, and a pair of rollers 15 and an elastic member 20 as an engagement member are incorporated 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.

  Here, a small-diameter concave portion 17 is formed on the inner surface side of the closed end portion of the outer ring 11, and the shaft end portion of the input shaft 1 is rotatably supported by a bearing 18 incorporated in the concave portion 17.

  The inner ring 13 is formed integrally with the input shaft 1. 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 has a wedge shape with narrow ends in the circumferential direction between the outer ring 11 and the cylindrical surface 12. A space is formed, and a flat spring support surface 19 facing the tangential direction of the inner ring 13 is provided between the pair of inclined surfaces 14 a and 14 b, and the elastic member 20 is supported by the spring support surface 19.

  The elastic member 20 consists of a coil spring. The elastic member 20 is incorporated between the pair of rollers 15, and the elastic member 20 biases the pair of rollers 15 in the separating direction to engage the cylindrical surface 12 and the cam surface 14. Is arranged.

  The holder 16 includes a control holder 16A and a rotary holder 16B. As shown in FIG. 2 and FIG. 6, the control retainer 16 </ b> A is provided with the same number of column portions 22 as the cam surface 14 on the outer peripheral portion of one surface of the annular flange 21 at equal intervals in the circumferential direction. An arc-shaped long hole 23 is formed on the outer periphery, and a cylindrical portion 24 is provided on the outer periphery in a direction opposite to the column portion 22.

  On the other hand, the rotation cage 16B is configured such that the same number of column portions 26 as the cam surface 14 are provided at equal intervals in the circumferential direction on the outer periphery of the annular flange 25.

  The control retainer 16A and the rotation retainer 16B are a combination in which the column portions 26 of the rotation retainer 16B are inserted into the elongated holes 23 of the control retainer 16A, and the column portions 22 and 26 are alternately arranged in the circumferential direction. ing. In the combined state, the end portions of the column portions 22 and 26 are disposed between the outer ring 11 and the inner ring 13, and the flange 21 of the control holder 16 </ b> A and the flange 25 of the rotary holder 16 </ b> B are fitted to the outer periphery of the input shaft 1. The support ring 28 and the outer ring 11 are integrated.

  By incorporating the cages 16A and 16B as described above, as shown in FIG. 3, a pocket 27 is formed between the column portion 22 of the control cage 16A and the column portion 26 of the rotary cage 16B. A pair of opposed rollers 15 and an elastic member 20 are incorporated in each pocket 27 so as to face the 13 cam surfaces 14 in the radial direction.

  As shown in FIG. 2, the flange 21 of the control holder 16A and the flange 25 of the rotary holder 16B are slidably supported along a slide guide surface 29 formed on the outer periphery of the input shaft 1, and the rotary holder 16B. A thrust bearing 30 is incorporated between the flange 25 and the support ring 28 fitted to the input shaft 1.

  The thrust bearing 30 rotatably supports the rotary cage 16B in a state that prevents the rotary cage 16B from moving to the electromagnetic clutch 50 side.

  As shown in FIGS. 2 and 6, a torque cam 40 is provided between the flange 21 of the control holder 16A and the flange 25 of the rotary holder 16B. As shown in FIGS. 7 (c) and 7 (d), the torque cam 40 gradually becomes deeper at both ends in the center in the circumferential direction on the opposing surfaces of the flange 21 in the control holder 16A and the flange 25 in the rotary holder 16B. A pair of opposing cam grooves 41, 42 that are shallower are provided, and a ball 43 is incorporated between the pair of opposing cam grooves 41, 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 21 of the control holder 16A approaches the flange 25 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 relatively rotated in the direction in which the circumferential width of the pocket 27 is reduced. .

  As shown in FIGS. 2, 4, and 5, a cylindrical holder fitting surface 44 having a diameter larger than that of the slide guide surface 29 is formed at the intersection of the one end surface in the axial direction of the inner ring 13 and the slide guide surface 29. The spring holder 45 is fitted to the holder fitting surface 44.

  The spring holder 45 is prevented from rotating with respect to the holder fitting surface 44 and is supported in a non-movable manner in the axial direction. On the outer periphery thereof, the column portion 22 of the control holder 16A and the column portion of the rotary holder 16B are provided. A plurality of detent pieces 46 disposed between the two are formed.

  When the control retainer 16A and the rotation retainer 16B rotate relative to each other in a direction that reduces the circumferential width of the pocket 27, the plurality of detent pieces 46 are connected to the column portion 22 of the control retainer 16A and the rotation retainer 16B. The column portion 26 is received at both side edges to hold the pair of opposed rollers 15 in a neutral position.

  A spring holding piece 47 is provided on the outer peripheral portion of the spring holder 45 so as to project to the outer diameter side of each of the plurality of elastic members 20, and the elastic member 20 escapes to the outer diameter side between the pair of rollers 15 by the spring holding pieces 47. 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 24 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.

  As shown in FIG. 2, the armature 51 is fitted to the outer periphery of the support ring 28 and is rotatably and slidably supported. The armature 51 is formed on the inner surface of the connecting cylinder 55 provided on the outer periphery of the armature 51. The cylinder 24 of the control holder 16A 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 28 and the slide guide surface 29 on the outer periphery of the input shaft 1.

  Here, the support ring 28 is positioned in the axial direction by a step portion 31 formed on the other side in the axial direction of the slide guide surface 29 of the input shaft 1.

  The rotor 52 is fitted to the input shaft 1, is positioned in the axial direction by a shim 56 built in between the support ring 28, and is prevented from rotating with respect to the input shaft 1.

  As shown in FIG. 1, the electromagnet 53 includes an electromagnetic coil 53a and a yoke 53b that supports the electromagnetic coil 53a. The yoke 53b is fitted into the other end opening of the housing 3 and is secured by a retaining ring 6 attached to the other end opening of the housing 3. The yoke 53 b is rotatable relative to the input shaft 1 via a bearing 57 fitted to the input shaft 1.

  As shown in FIGS. 8 and 9, the electromagnetic coil 53 a is entirely covered with a resin-molded housing 60, and a male connector 70 is provided simultaneously with the molding of the housing 60.

  The male connector 70 has a terminal 71 connected to the terminal of the electromagnetic coil 53 a and a connection tube 72 covering the terminal 71, and a female provided at the terminal of the power cord 73 with respect to the connection tube 72. The connector 74 is detachable.

Here, the yoke 53b is provided with an annular groove 61 on the end surface facing the rotor 52 shown in FIG. 1, and a connector insertion hole 62 is formed on the closed end surface of the annular groove 61.
The housing 60 is fitted into the annular groove 61 so that the male connector 70 is inserted into the connector insertion hole 62 and is prevented from being removed. Here, the opening of the annular groove 61 is caulked for the retaining. Reference numeral 63 in FIG. 8 denotes the caulking projection.

  Instead of caulking, the housing 60 may be bonded to the inner peripheral surface of the annular groove 63 as shown in FIG. Reference numeral 64 in FIG. 10 denotes an adhesive layer.

  Here, in the female connector 74, a groove 75 reaching the front and rear end surfaces is formed on the upper surface, and an engaging claw 76 as an engaging portion is provided in the groove 75. The engaging claw 76 is integrated with the female connector 74 at the rear end in the insertion direction when the female connector 74 is inserted into the connection tube 72 of the male connector 70, and the distal end is flexible with the rear end as a fulcrum. The collar portion 77 is formed at the tip portion.

  When the female connector 74 is connected to the male connector 70, the collar portion 77 is snap-fitted into an engagement hole 78 as an engaged portion formed in the male connector 70.

  The rotation transmission device shown in the embodiment has the above-described structure, and the roller 15 of the two-way clutch 10 is as shown in FIG. 3 (b) in a state where the energization of the electromagnetic coil 53a of the electromagnetic clutch 50 shown in FIG. In addition, it is in a state of engaging with the cylindrical surface 12 of the outer ring 11 and the cam surface 14 of the inner ring 13.

  Therefore, when the input shaft 1 rotates in one direction, the rotation is transmitted from the inner ring 13 to the outer ring 11 through one of the pair of opposed rollers 15, and the output shaft 2 rotates in the same direction as the input shaft 1. When the input shaft 1 rotates in the opposite direction, the rotation is transmitted to the output shaft 2 via the other roller 15.

  When the electromagnetic coil 53a of the electromagnetic clutch 50 is energized while the two-way clutch 10 is engaged, an attractive force acts on the armature 51, and the armature 51 moves in the axial direction and is attracted to the rotor 52.

  At this time, since the armature 51 and the control holder 16A are connected and integrated by fitting the connecting cylinder 55 and the cylinder portion 24, the control holder 16A moves along with the movement of the armature 51 in the axial direction. The flange 21 moves in a direction approaching the flange 25 of the rotary cage 16B.

  Due to the relative movement of the control holder 16A and the rotary holder 16B, the ball 43 shown in FIG. 7D is directed to the deepest position of the cam grooves 41 and 42 as shown in FIG. 7C. 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 27 decreases.

  Due to the relative rotation of the control holder 16A and the rotary holder 16B, the pair of opposed rollers 15 shown in FIG. 3B are pushed by the column portion 22 of the control holder 16A and the column portion 26 of the rotary holder 16B and approach each other. Move in the direction you want.

  Therefore, as shown in FIG. 3A, the roller 15 is displaced to a neutral position where the engagement with the cylindrical surface 12 and the cam surface 14 is disengaged, and the two-way clutch 10 is disengaged.

  When the rotational torque is input to the input shaft 1 and the input shaft 1 is rotated in one direction in the disengaged state of the two-way clutch 10, the detent piece 46 formed on the spring holder 45 is controlled by the control retainer 16A. The control holder 16A and the rotary holder 16B rotate together with the input shaft 1 in order to press one of the pillar part 22 and the pillar part 26 of the rotary holder 16B. 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 input shaft 1 is not transmitted to the outer ring 11 and the input shaft 1 rotates freely.

  Here, when the control retainer 16A and the rotation retainer 16B are relatively rotated in the direction in which the circumferential width of the pocket 27 is reduced, the column portion 22 of the control retainer 16A and the column portion 26 of the rotation retainer 16B are The amount of relative rotation is regulated by contacting both side edges of the rotation stopper piece 46.

  For this reason, the elastic member 20 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 input shaft 1, the armature 51 is released from the suction and becomes rotatable. By releasing the suction, the control holder 16A and the rotary holder 16B are relatively rotated by the pressing of the elastic member 20 in the direction in which the circumferential width of the pocket 27 is increased, and each of the pair of opposed rollers 15 is shown in FIG. As shown in FIG. 3, the standby state is established in which the cylindrical surface 12 and the cam surface 14 are engaged, and the rotation of the input shaft 1 is transmitted to the output shaft 2 through one of the pair of opposed rollers 15.

  Here, when the input shaft 1 is stopped and the rotation direction of the input shaft 1 is switched, the rotation of the input shaft 1 is transmitted to the output shaft 2 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 27 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 input shaft 1 to the output shaft 2 through the same number of rollers 15 as the cam surface 14, a large rotational torque can be transmitted from the input shaft 1 to the output shaft 2.

  When the control retainer 16A and the rotation retainer 16B are relatively rotated in the direction in which the circumferential width of the pocket 27 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.

  As described above, when the electromagnetic clutch 50 is turned off, the two-way clutch 10 is engaged, and when the electromagnetic clutch 50 is turned on, the two-way clutch 10 is disengaged, which is extremely effective for applications requiring a fail-safe mechanism. is there.

  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 column portions 22 and 26 are positioned between the outer ring 11 and the inner ring 13, and the flanges 21 and 25 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, as shown in FIGS. 8 to 10, a male connector 70 in which a female connector 74 provided at a terminal portion of the power cord 73 is detachable at the same time as the housing 60 enclosing the electromagnetic coil 53a of the electromagnet 53 is formed. The male connector 70 is inserted into the connector insertion hole 62 formed in the yoke 53b, and an insertion port through which the female connector 74 is inserted / removed is provided on the back side of the surface of the yoke 53b facing the rotor 52. It is possible to eliminate the need for withdrawal.

  Here, if there is a lead wire, when the rotation transmission device is assembled, the lead wire may be caught in other parts, thereby obstructing the assembly operation, or inconveniences such as disconnection of the lead wire may occur. However, in the embodiment, since there is no lead wire, such inconvenience does not occur, and the rotation transmission device can be easily handled.

  In the rotation transmission device in the embodiment, as the two-way clutch 10, the control holder 16A is moved in the axial direction by energization of the electromagnet 53, the control holder 16A and the rotation holder 16B are relatively rotated, and the engagement element. Although a roller type in which the roller 15 is engaged with the inner periphery of the outer ring 11 and the outer periphery of the inner ring 13 is shown, the two-way clutch is not limited to this. For example, a pair of cages having different diameters are arranged on the inside and outside, and an outside cage having a large diameter is formed by a control cage and a rotary cage, and a pair of sprags as an engagement member is released by de-energizing the electromagnet of the electromagnetic clutch. Are engaged with the inner peripheral cylindrical surface of the outer ring and the outer peripheral cylindrical surface of the inner ring by an elastic member incorporated between the opposed parts, and the control retainer and the rotational retainer are relatively rotated by energization of the electromagnet, A sprag type that disengages the sprags may be used.

1 Input shaft 2 Output shaft 10 Two-way clutch 11 Outer ring 13 Inner ring 15 Roller (engagement element)
16A Control retainer 16B Rotation retainer 50 Electromagnetic clutch 51 Armature 52 Rotor 53 Electromagnet 53a Electromagnetic coil 53b York 60 Housing 61 Annular groove 62 Connector insertion hole 70 Male connector 73 Power cord 74 Female connector 76 Engagement claw (engagement part)
78 engaging hole (engaged part)

Claims (6)

A two-way clutch that transmits and blocks rotation from an input shaft to 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 electromagnetic clutch includes an armature supported so as to be movable in the axial direction of the input shaft, a rotor facing the armature in the axial direction, a yoke having an annular groove formed on a surface facing the rotor in the axial direction, and It has an electromagnetic coil built into the annular groove of the yoke, and consists of an electromagnet that attracts the armature to the rotor by energizing the electromagnetic coil.
In the rotation transmission device configured to disengage the two-way clutch by energizing the electromagnet of the electromagnetic clutch,
The electromagnet is provided with a male connector to which a female connector provided at a terminal portion of a power cord can be attached and detached, and an insertion port through which the female connector of the male connector is inserted / removed is provided on the back side of the surface facing the rotor of the yoke. A rotation transmission device characterized by that.   The rotation transmission device according to claim 1, wherein the male connector includes an engaged portion to which an engaging portion provided in the female connector is snap-fitted.   The rotation transmission device according to claim 2, wherein the engaged portion includes an engagement hole.   The electromagnetic coil is entirely covered with a resin-molded housing, the male connector is molded simultaneously with the molding of the housing, and a connector insertion hole is provided in the closed end wall of the annular groove formed in the yoke, The rotation transmission device according to any one of claims 1 to 3, wherein the housing is fitted in the annular groove, and the housing is secured in a state where the male connector is inserted into the connector insertion hole.   The rotation transmission device according to claim 4, wherein the retaining of the housing is performed by caulking at an opening of the annular groove.   The rotation transmission device according to claim 4, wherein the housing is prevented from being detached.

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