JP2014025483A - Rotation transmission apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hermetically seal an aperture end of a housing without damaging a bearing for relatively rotatably supporting an input shaft and an output shaft in a rotation transmission apparatus for controlling engagement and disengagement of a two-way clutch by an electromagnetic clutch.SOLUTION: A bearing cylinder 4 for rotatably supporting an output shaft 2 is attached to an end part of a housing 3 covering a two-way clutch 10 for transmitting/blocking transmission of rotation between an input shaft 1 and the output shaft 2 and an electromagnetic clutch 50 for controlling engagement/disengagement of the two-way clutch 10 and a hermetic seal 60 is attached by press fitting to an inner diameter surface of an aperture end part of the bearing cylinder 4 to prevent a bearing 18 for relatively rotatably supporting the input shaft 1 and the output shaft 2 from being damaged, and the aperture end is closed by the hermetic seal 60 to prevent intrusion of a foreign material.

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 retainer is moved in a direction in which the flange of the control retainer is separated from the flange of the rotation retainer by the electromagnetic clutch, due to the pressing action of the elastic member incorporated between the pair of opposed rollers, The control cage and the rotary cage rotate relative to each other in the direction in which the circumferential width of the pocket increases, and the pair of opposed rollers immediately engage the cylindrical surface and the cam surface. It has the feature of being excellent.

JP 2009-293679 A

  By the way, in the rotation transmission device described in Patent Document 1, each of 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 normally output. The housing for supporting the shaft is covered with a housing having an end portion, but if the two-way clutch or electromagnetic clutch is simply covered with the housing, foreign matter enters the inside through the opening of the bearing tube, There is a possibility that the two-way clutch may not function due to the biting of foreign matter.

  In order to eliminate such inconvenience, a dust cover is press-fitted into the outer diameter surface of the output shaft, and the end of the bearing cylinder is formed by a disk part provided on the dust cover and a cylindrical part provided on the outer periphery of the disk part. In general, the intrusion of foreign matter is prevented so as to cover the opening of the part.

  However, when adopting a dust cover with a labyrinth structure, it is conceivable to press-fit the dust cover into the outer diameter surface of the output shaft in consideration of the direction of centrifugal force in order to make it easy to discharge foreign matter. The dust cover is attached by supporting the shaft end surface of the input shaft with a table and the like, and pressing the dust cover onto the outer diameter surface from the shaft end of the output shaft. There is a point to be improved in preventing the bearing from being damaged by being loaded on a bearing that supports the shaft relatively rotatably.

  An object of the present invention is to provide a rotation transmission device having a two-way clutch that transmits and blocks rotation between an input shaft and an output shaft and an electromagnetic clutch that controls engagement and release of the two-way clutch. It is possible to seal the open end of the housing without damaging a bearing that relatively rotatably supports the output shaft.

  In order to solve the above-described problems, in the present invention, transmission and interruption of rotation from an input shaft to an output shaft that is coaxially arranged with the input shaft and is relatively rotatably supported by a bearing is performed. A two-way clutch, an electromagnetic clutch provided on the input shaft and facing the two-way clutch, and a bearing cylinder that covers the electromagnetic clutch and the two-way clutch and through which the output shaft is inserted are provided at one end. A rotation transmission device, wherein the electromagnetic clutch includes an electromagnet, the two-way clutch is disengaged by energizing the electromagnet, and the two-way clutch is engaged by cutting off the energization. A configuration is adopted in which a hermetic seal is press-fitted into the inner diameter surface of the bearing cylinder in the housing to seal between the inner diameter surface of the bearing cylinder and the outer diameter surface of the output shaft.

  As described above, it is possible to prevent foreign matter from entering the housing by incorporating a hermetic seal in the bearing cylinder and sealing between the inner diameter surface of the bearing cylinder and the outer diameter surface of the output shaft. Since the sealing seal for preventing foreign material intrusion is press-fitted into the inner diameter surface of the bearing cylinder, the sealing seal can be assembled without applying a load to the bearing that supports the output shaft and the input shaft in a relatively rotatable manner. Can be done.

  Here, the hermetic seal has a seal lip that is elastically contacted with the outer diameter surface of the output shaft, and a garter spring that is attached to the outer periphery of the seal lip and elastically contacts the lip tip of the seal lip with the outer diameter surface of the output shaft. It may consist of an oil seal with a spring, or an inward lip and an outward lip that are in elastic contact with the outer diameter surface of the output shaft, and an outer diameter of the output shaft that is arranged outside the outward lip It may consist of a triple lip oil seal having a third lip forming a labyrinth between the faces.

  In addition, the hermetic seal is formed with a disk part inward from the inner end of the fitting cylinder part fitted to the inner diameter surface of the bearing cylinder, and the disk part is fitted to the outer diameter surface of the output shaft. A radial lip that is elastically contacted to the outer diameter surface of the cylindrical portion of the slinger, and a pair of side lips that are elastically contacted to the inner surface of the disk portion that faces radially outward from the outer end of the cylindrical portion are provided. It may consist of a highly airtight oil seal.

  By adopting the hermetic seal as described above, foreign matter can be surely prevented from entering into the two-way clutch, so that the cost is low as a bearing that relatively rotatably supports the input shaft and the output shaft. An open type can be adopted.

  In the rotation transmission device according to the present invention, as the two-way clutch, an inner periphery of an outer ring provided with a bearing provided at the shaft end portion of the output shaft and rotatably supporting the shaft end portion of the input shaft in the closed end portion; Between the outer periphery of the inner ring provided at the shaft end of the input shaft, a plurality of circularly arranged pillars provided in the control cage and a plurality of circularly arranged pillars provided in the rotary cage are arranged in the circumferential direction. A pocket is provided between adjacent pillars that are assembled so as to be alternately arranged, a pair of opposing engagement elements are incorporated in the pocket, and the pair of engagement elements are separated by an elastic member incorporated between the opposed parts. Energized toward the direction and engaged with the inner circumference of the outer ring and the outer circumference of the inner ring, and by energizing the electromagnet of the electromagnetic clutch, the control cage and the rotary cage are relatively rotated in the direction in which the circumferential width of the pocket is reduced. Let the pair of engagement elements disengage Can be adopted of engaging elements type so as to.

  In this case, the engagement element may be a roller or a sprag.

  In the present invention, as described above, a sealing seal is press-fitted into the bearing cylinder to seal between the inner diameter surface of the bearing cylinder and the outer diameter surface of the output shaft, thereby rotating the output shaft and the input shaft relatively. The opening end of the housing can be sealed without damaging the freely supporting bearing, and foreign matter can be reliably prevented from entering.

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. (E) And (f) is sectional drawing which shows each example of a hermetic seal

  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 on the outer periphery of the inner ring 13 at equal intervals in the circumferential direction, and a roller 15 and an elastic member 20 as a pair of engaging members 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, between the flange 21 of the control holder 16A and the flange 25 of the rotary holder 16B, the movement of the control holder 16A in the axial direction is controlled between the control holder 16A and the rotary holder 16B. A torque cam 40 is provided as a motion converting mechanism that converts the relative rotational motion of the motor.

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

  The other end opening of the housing 3 is closed by the incorporation of the electromagnet 53 to prevent foreign matter from entering the housing 3.

  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 released, 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.

  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.

  In the rotation transmission device as described above, in which the engagement and release of the two-way clutch 10 are controlled by the electromagnetic clutch 50 to transmit and block the rotation between the input shaft 1 and the output shaft 2, Since the end opening is closed by incorporating the electromagnet 53, foreign matter does not enter the inside of the housing 3 from the opening end, but the outer end of the bearing cylinder 4 provided at one end of the housing 3 is open. If there is, foreign matter may enter the housing 3 from the open end of the bearing cylinder 4 and the two-way clutch 10 may not function due to the foreign matter being caught.

  In order to prevent such inconvenience, in FIG. 1, the sealing seal 60 is press-fitted into the inner diameter surface of the opening end portion of the bearing cylinder 4 while holding the housing 3, and the inner diameter surface of the bearing cylinder 4 and the output shaft 2. Seals between outer diameter surfaces.

  As described above, it is possible to prevent foreign matter from entering the housing 3 by closing the open end of the bearing tube 4 by incorporating the sealing seal 60 into the bearing tube 4. Since the sealing seal 60 for preventing foreign matter intrusion is press-fitted into the inner diameter surface of the bearing cylinder 4 while holding the housing 3, the axial load accompanying the press-fitting escapes through the housing 3, so that the output shaft 2 and the input shaft The seal seal 60 can be assembled without applying a load to the bearing 18 that relatively rotatably supports the bearing 1, and the bearing 18 is not damaged.

  Further, since foreign matter can be prevented from entering the housing 3, the bearing 5 that rotatably supports the output shaft 2 and the bearing 18 that relatively rotatably supports the output shaft 2 and the input shaft 1. For each of these, an open type bearing or a non-contact type bearing advantageous in cost can be adopted.

  FIGS. 8E and 8F show examples of the hermetic seal 60. The seal seal 60 shown in FIG. 8 (e) is mounted on the outer periphery of the seal lip 61 elastically contacting the outer diameter surface of the output shaft 2 and the outer periphery of the seal lip 61, and the lip tip 63 of the seal lip 61 is attached to the output shaft 2. It consists of an oil seal with a spring having a garter spring 62 which is brought into elastic contact with the outer diameter surface. Reference numeral 64 denotes a reinforcing metal ring.

  The sealing seal 60 shown in FIG. 8 (e) is disposed on the outer lip 66 and the outward lip 66 elastically in contact with the outer diameter surface of the output shaft 2, and is disposed outside the outward lip 66 to It consists of a triple lip oil seal having a third lip 68 forming a labyrinth 67 between outer diameter surfaces. Reference numeral 69 denotes a reinforcing metal ring.

  In any of the above-described sealing seals 60, the entry of foreign matter into the housing 3 can be effectively prevented. Further, since any of the sealing seals 60 is press-fitted into the inner diameter surface of the bearing cylinder 4, the bearing 18 is not damaged.

  In the rotation transmission device in the embodiment shown in FIG. 1, as the two-way clutch 10, the control cage 16 </ b> A is moved in the axial direction by deenergizing the electromagnet 53, and the control cage 16 </ b> A and the rotation cage 16 </ b> B are moved relative to each other. Although a roller type is shown in which the roller 15 as an engagement element is engaged with the inner periphery of the outer ring 11 and the outer periphery of the inner ring 13, 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 cam ring by an elastic member incorporated between the opposing portions, 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.

DESCRIPTION OF SYMBOLS 1 Input shaft 2 Output shaft 3 Housing 4 Bearing cylinder 10 Two-way clutch 11 Outer ring 12 Cylindrical surface 13 Inner ring 14 Cam surface 15 Roller (engagement element)
16A Control cage 16B Rotating cage 18 Bearing 20 Elastic member 22 Column portion 26 Column portion 27 Pocket 50 Electromagnetic clutch 60 Seal seal 61 Seal lip 62 Gutter spring 63 Lip tip 65 Inward lip 66 Outward lip 67 Labyrinth 68 Third lip

Claims (6)

A two-way clutch for transmitting and shutting off rotation from an input shaft to an output shaft disposed coaxially with the input shaft and supported relatively rotatably by a bearing; and provided on the input shaft An electromagnetic clutch opposed to the two-way clutch, and a housing that covers the electromagnetic clutch and the two-way clutch and is provided with a bearing cylinder through which the output shaft is inserted at one end, and the electromagnetic clutch is an electromagnet A rotation transmission device that disengages the two-way clutch by energizing the electromagnet, and engages the two-way clutch by cutting off the energization.
A rotation transmission device, wherein a sealing seal is press-fitted into an inner diameter surface of a bearing cylinder in the housing to seal between an inner diameter surface of the bearing cylinder and an outer diameter surface of an output shaft.   A spring having a seal lip that elastically contacts the outer diameter surface of the output shaft and a garter spring that is attached to the outer periphery of the seal lip and elastically contacts the lip tip of the seal lip with the outer diameter surface of the output shaft. The rotation transmission device according to claim 1, comprising an attached oil seal.   The hermetic seal is inwardly and outwardly lip elastically contacted with the outer diameter surface of the output shaft, and a third is disposed outside the outer lip to form a labyrinth between the outer diameter surfaces of the output shaft. The rotation transmission device according to claim 1, comprising a triple lip oil seal having a lip.   A disc portion is formed inward from the inner end of the fitting cylinder portion that is fitted to the inner diameter surface of the bearing cylinder, and the disc seal portion is fitted to the outer diameter surface of the output shaft. A radial lip that is elastically contacted to the outer diameter surface of the cylindrical portion of the slinger, and a pair of side lips that are elastically contacted to the inner surface of the disk portion that faces radially outward from the outer end of the cylindrical portion are provided. The rotation transmission device according to claim 1, comprising a highly airtight oil seal.   The two-way clutch is provided at the shaft end of the output shaft, and is provided at the inner periphery of the outer ring and the shaft end of the input shaft in which a bearing that rotatably supports the shaft end of the input shaft is incorporated in the closed end. A plurality of circularly arranged pillars provided in the control cage and a plurality of circularly arranged pillars provided in the rotary cage are assembled between the outer circumferences of the inner ring so as to be alternately arranged in the circumferential direction. A pocket is provided between adjacent column parts, a pair of opposing engagement elements are assembled in the pocket, and the pair of engagement elements are biased in a direction away from each other by an elastic member incorporated between the opposing parts. Engage the inner circumference of the outer ring with the outer circumference of the inner ring, and by energizing the electromagnet of the electromagnetic clutch, 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. Engagement type that disengages the coupling Rotation transmission device according to any one of claims 1 to 4 consisting of things.   The engaging element comprises a roller, and the roller can be engaged with a cylindrical surface formed on the inner periphery of the outer ring and a cam surface formed on the outer periphery of the inner ring to form a wedge space between the cylindrical surface. The rotation transmission device according to claim 5.

Images