JP6491404B1 - clutch - Google Patents

Abstract

The clutch (50) has a first rotating body (52) having a plurality of engaging surfaces (52e, 52f) in the circumferential direction of the outer peripheral surface (52c), and the outer periphery of the first rotating body (52) A cylindrical second rotating body (53) surrounding the surface (52c), the plurality of engaging surfaces (52e, 52f) of the first rotating body (52), and the second rotating body (53) And a plurality of first engaging members (54A) and a plurality of second engaging members (54B) interposed between the inner peripheral surface (53b) of When the first armature (55A) is attracted to the first electromagnet (57A), the plurality of first engagement members (54A) are engaged with the plurality of engagement surfaces (52e, 52f) and the inner circumferential surface (55A). 53b). When the second armature (55B) is attracted to the second electromagnet (57B), the plurality of second engagement members (54B) are engaged with the plurality of engagement surfaces (52e, 52f) and the inner circumferential surface (55b). 53b).

Description

  The present invention relates to an improvement technique of a clutch used for switching between transmission and shutoff of power.

  Among the clutches, there is a two-way clutch capable of transmitting torque in both forward and reverse directions of the input shaft. A clutch of this kind is known, for example, from U.S. Pat.

  The clutch known in Patent Document 1 is a so-called reverse operation type roller clutch that is in an open state when the electromagnetic coil is energized. This roller type clutch has an inner ring and an outer ring, a plurality of rollers, a cage and an electromagnet as basic components. The inner ring has a plurality of engagement surfaces in the circumferential direction of the outer peripheral surface. The outer ring surrounds the outer circumferential surface of the inner ring. The plurality of rollers are interposed between the plurality of engagement surfaces of the inner ring and the inner circumferential surface of the outer ring. The cage can engage or release the plurality of rollers with the plurality of engagement surfaces and the inner circumferential surface of the outer ring by displacing in the axial direction and the circumferential direction depending on the presence or absence of the electromagnetic force of the electromagnet. .

Patent No. 5658046 gazette

  In the clutch known in Patent Document 1, when the electromagnetic coil is not energized, the clutch is engaged. Moreover, in the normal use state in which the clutch is released, energization is continued, so there is room for improvement from the viewpoint of suppression of power consumption. On the other hand, it is conceivable to reduce power consumption by releasing the clutch when no current is applied. However, in the case where a failure occurs in the electromagnetic coil or the electric system (in the case where a primary failure occurs), the clutch can only maintain the open state, so there is room for further improvement.

  An object of the present invention is to provide a technology capable of switching between an engaged state and an opened state of a clutch even when a primary failure occurs while reducing power consumption.

According to the invention, the clutch is
A first rotating body having a plurality of engaging surfaces in the circumferential direction of the outer peripheral surface;
A cylindrical second rotating body surrounding the outer peripheral surface of the first rotating body;
A plurality of first engagement members and a plurality of second engagement members interposed between the plurality of engagement surfaces of the first rotating body and the inner circumferential surface of the second rotating body;
A first armature which is provided on the first rotary body so as to be capable of relative movement in the axial direction, and which engages the plurality of first engagement members with the plurality of engagement surfaces and the inner circumferential surface;
A first rotor made of a magnetic body provided on the first rotor with both relative rotation and relative movement in the axial direction restricted and having a rotor surface facing the first armature;
A first electromagnet facing the first armature with the first rotor interposed therebetween, and axially displacing the first armature;
A second armature which is provided on the first rotary body so as to be capable of relative movement in the axial direction, and which engages the plurality of second engagement members with the plurality of engagement surfaces and the inner circumferential surface;
It is provided on either one of the first rotating body and the second rotating body while restricting both relative rotation and relative movement in the axial direction, and it comprises a magnetic body having a rotor surface facing the second armature. The second rotor,
And a second electromagnet that faces the second armature with the second rotor interposed therebetween and axially displaces the second armature.

  The clutch of the present invention has a dual clutch function. By energizing the electromagnetic coil of at least one electromagnet, the clutch is engaged. Therefore, even when a failure occurs in any one of the two electromagnetic coils and the electrical system, that is, even when a primary failure occurs in the clutch, switching between the engaged state and the released state of the clutch is possible. Moreover, in the normal use state in which the clutch is released, no current is supplied to any of the electromagnetic coils. Therefore, power consumption can be suppressed.

FIG. 1 is a schematic view of a vehicle steering system using a clutch according to a first embodiment of the present invention. 1 is a cross-sectional view of a clutch according to a first embodiment of the present invention. It is an exploded view of the 1st rotary body shown by FIG. 2, an engagement member, an armature, an urging member, and a slider. FIG. 3 is an axial cross-sectional view of the clutch in an open state shown in FIG. 2; FIG. 5 is a schematic view of a state in which an engaging member of the clutch shown in FIG. 4 is engaged. FIG. 5 is a developed view in which the configuration in which the armature, the holding portion, the engaging member, the biasing member, and the slider shown in FIG. 4 are combined is opened outward. FIG. 7 is an operation view in which the engaged state of the clutch shown in FIG. 6 is expanded outward. FIG. 5 is an operation view of an engaged state of a clutch shown in FIG. 4 as viewed from an axial direction. FIG. 7 is an operational view in which the state in which only one of the clutches shown in FIG. 6 is engaged is expanded outward. FIG. 5 is an operation view as seen from the axial direction when only one of the clutches shown in FIG. 4 is engaged. It is sectional drawing of the clutch by Example 2 of this invention. It is sectional drawing of the clutch by Example 3 of this invention.

  A mode for carrying out the present invention will be described below based on the attached drawings.

Example 1
A vehicle steering apparatus 10 using a clutch 50 according to a first embodiment will be described with reference to FIGS. 1 to 10.

  As shown in FIG. 1, the vehicle steering apparatus 10 includes a steering unit 12 that generates steering input of a steering wheel 11 of the vehicle, a steering unit 14 that steers the left and right steered wheels 13 and 13, and a steering unit. It includes a clutch 50 incorporated in a steering force transmission path 15 between the steering wheel 12 and the steering unit 14, and a control unit 16.

  More specifically, the vehicle steering apparatus 10 incorporates a clutch 50 in the steering force transmission path 15 between the steering unit 12 and the steering unit 14, a so-called steer-by-wire (abbreviated to " "SBW" is adopted. In the vehicle steering system 10, the clutch 50 is normally in the open state, and the steering unit 12 and the steering unit 14 are mechanically separated. For this reason, by operating the steering actuators 39 according to the amount of steering of the steering wheel 11 during normal times, the left and right steered wheels 13, 13 can be steered. Further, the steering force can be transmitted from the steering unit 12 to the steered unit 14 only when the clutch 50 is in the engaged state.

  The steering unit 12 includes a steering wheel 11 operated by a driver, a steering shaft 21 connected to the steering wheel 11, and a reaction force addition actuator for applying a steering reaction force (reaction force torque) to the steering wheel 11. And 22. The reaction force application actuator 22 gives the driver a steering feeling by generating a steering reaction force that the driver resists the steering force of the steering wheel 11. The reaction force application actuator 22 is appropriately rephrased as "first actuator 22".

  The reaction force application actuator 22 includes a reaction force motor 23 (first motor 23) that generates a steering reaction force, and a reaction force transmission mechanism 24 that transmits the steering reaction force to the steering shaft 21. The reaction force motor 23 is configured of, for example, an electric motor. The reaction force transmission mechanism 24 is configured of, for example, a worm gear mechanism. The worm gear mechanism 24 (the reaction force transmission mechanism 24) includes a worm gear 24a provided on the motor shaft 23a of the reaction force motor 23, and a worm wheel 24b provided on the steering shaft 21. The steering reaction force generated by the reaction force motor 23 is added to the steering shaft 21 via the reaction force transmission mechanism 24.

  The steering force transmission path 15 is a path between the steering shaft 21 of the steering unit 12 and the operation force transmission mechanism 35 of the steering unit 14. For example, the steering force transmission path 15 transmits torque from the first shaft 33 (input shaft 33) connected to the steering shaft 21 by the universal shaft joints 31 and 31 and the connecting shaft 32. And a second shaft 34 (output shaft 34). The clutch 50 is interposed between the first shaft 33 and the second shaft 34.

  The steered portion 14 is coupled to the steered shaft 36 connected to the second shaft 34 by the operation force transmission mechanism 35 and to both ends of the steered shaft 36 via tie rods 37 and 37 and knuckles 38 and 38. And left and right steered wheels 13, 13, and a steering actuator 39 for applying steering power to the steered shaft 36. The steering actuator 39 is appropriately rephrased as "second actuator 39".

  The operation force transmission mechanism 35 is configured of, for example, a rack and pinion mechanism. The rack and pinion mechanism 35 (operation force transmission mechanism 35) includes a pinion 35a provided on the second shaft 34 and a rack 35b provided on the steered shaft 36. The steered shaft 36 is movable in the axial direction (vehicle width direction).

  The steering actuator 39 includes a steering power motor 41 (second motor 41) that generates steering power, and a steering power transmission mechanism 42 that transmits the steering power to the steering shaft 36. The steering power generated by the steering power motor 41 is transmitted to the steering shaft 36 by the steering power transmission mechanism 42. As a result, the steering shaft 36 slides in the vehicle width direction. The steering power motor 41 is configured of, for example, an electric motor.

  The steering power transmission mechanism 42 includes, for example, a belt transmission mechanism 43 and a ball screw 44. The belt transmission mechanism 43 is engaged with a drive pulley 45 provided on the motor shaft 41 a of the steering power motor 41, a driven pulley 46 provided on a nut of the ball screw 44, and the drive pulley 45 and the driven pulley 46. It consists of a belt 47. The ball screw 44 is a type of conversion mechanism that converts rotational motion into linear motion, and transmits the driving force generated by the steering power motor 41 to the steering shaft 36. The steering power transmission mechanism 42 is not limited to the configurations of the belt transmission mechanism 43 and the ball screw 44, and may be, for example, a worm gear mechanism or a rack and pinion mechanism.

  The control unit 16 receives signals from various sensors (not shown) and applies current to the reaction force motor 23, the steering power motor 41 and the clutch 50.

  Hereinafter, the clutch 50 will be described in detail. The clutch 50 is a two-way clutch capable of transmitting torque in both the forward and reverse directions of the first shaft 33 (input shaft 33).

  As shown in FIG. 2, the clutch 50 includes a case 51, a first rotating body 52 and a second rotating body 53, which are respectively accommodated in the case 51, a plurality of first engagement members 54A, and a plurality of first engaging members 54A. The second engagement member 54B, the first armature 55A and the second armature 55B, the first rotor 56A and the second rotor 56B, the first electromagnet 57A and the second electromagnet 57B, the plurality of first holding portions 58A, and the plurality The second holding portion 58B is a basic component.

  The rotating bodies 52, 53, the armatures 55A, 55B, the rotors 56A, 56B, the electromagnets 57A, 57B, the first shaft 33 and the second shaft 34 are the rotation center line CL of the first rotating body 52. It is located in

  The first rotating body 52 is a flat plate-like member that can rotate with the first shaft 33. For example, the first rotating body 52 is integrally formed with the first shaft 33. The first shaft 33 penetrates the inside and the outside of the case 51. Of the first rotating body 52, the end face 52a on the first shaft 33 side is referred to as a "first board surface 52a", and the end face 52b opposite to the first board surface 52a is referred to as a "second board surface 52a". It is called board 52b.

  More specifically, the first shaft 33 extends from the first surface 52 a of the first rotating body 52 to the outside of the case 51. The portion 61 of the first shaft 33 housed in the case 51 is referred to as a “first shaft portion 61”. Furthermore, the first rotating body 52 has a second shaft portion 62 extending from the second board surface 52 b to the side opposite to the first shaft 33. The second shaft portion 62 is located at the rotation center line CL of the first rotating body 52. The first shaft 61 and the second shaft 62 have male serrations or male splines. The presence of male serrations and male splines is optional. Thus, the first shaft 33 (including the first shaft portion 61) and the second shaft portion 62 are parts of the first rotating body 52.

  The second rotary body 53 is a completely round or elliptical bottomed cylindrical member surrounding the outer peripheral surface 52c of the first rotary body 52, and the surface on the first shaft 33 side is opened, The opposite surface is closed by a disk-shaped bottom plate 53a. The second rotating body 53 is rotatable with a second shaft 34 extending outward of the case 51. For example, the second rotating body 53 is integrally formed with the second shaft 34.

  The first shaft 33 is rotatably supported by the bearing 71 on the case 51. The second shaft 34 is located on the opposite side of the case 51 to the first shaft 33, and is rotatably supported by the bearing 72 on the case 51. The second shaft portion 62 of the first rotating body 52 and the bottom plate 53 a of the second rotating body 53 are supported by the bearing 73 so as to be capable of relative rotation with each other. The first rotating body 52 and the second rotating body 53 are restricted from axial movement with respect to the case 51.

  As shown in FIGS. 3 to 5, the outer peripheral surface 52 c of the first rotating body 52 is polygonal. More specifically, when viewed along the rotation center line CL, the outer peripheral surface 52c has, for example, a so-called octagonal shape having missing surfaces 52d at four corners of a square, for example. In addition, the presence or absence of the missing surface 52d is optional.

  Among the four faces (four sides) 52e, 52e, 52f and 52f of the above-mentioned regular quadrangle provided on the outer peripheral face 52c of the first rotating body 52, "a plurality of opposing faces 52e and 52e among The other two opposing surfaces 52f and 52f are referred to as "a plurality of second engagement surfaces 52f and 52f". The four surfaces 52e, 52e, 52f, 52f are in the order of the first engagement surface 52e, the second engagement surface 52f, the first engagement surface 52e, and the second engagement surface 52f in the circumferential direction of the outer peripheral surface 52c. It is arranged. That is, the plurality of first engagement surfaces 52e and the plurality of second engagement surfaces 52f are so-called cam surfaces alternately provided on the outer peripheral surface 52c of the first rotating body 52. Hereinafter, the first engagement surface 52e is appropriately rephrased as "first cam surface 52e". The second engagement surface 52f is appropriately rephrased as "second cam surface 52f".

  The plurality of first engagement surfaces 52e and the plurality of second engagement surfaces 52f define the distance between the outer peripheral surface 52c of the first rotating body 52 and the inner peripheral surface 53b of the second rotating body 53 as the inner peripheral surface 53b. The outer circumferential surface 52c of the first rotating body 52 is alternately provided to be able to decrease in the circumferential direction, that is, to form a plurality of tapered space portions 81A and 81B.

  When viewed along the rotation center line CL, each of the tapered space portions 81A and 81B includes the inner peripheral surface 53b of the second rotating body 53, the respective first engagement surfaces 52e, and the respective second engagement surfaces 52f. , Is a space surrounded by a tapered end. Hereinafter, the tapered space 81A surrounded by the inner peripheral surface 53b of the second rotating body 53 and the first engagement surface 52e will be referred to as "first tapered space 81A" as appropriate. The tapered space 81B surrounded by the inner peripheral surface 53b of the second rotating body 53 and the second engagement surface 52f is referred to as "second tapered space 81B" as appropriate.

  The plurality of first engagement members 54A and the plurality of second engagement members 54B are located at a plurality of first engagement surfaces 52e and a plurality of second engagement surfaces 52f, and are formed of a first rotary member. It comprises a roller (cylinder) extending along the 52 rotation center line CL. Specifically, the plurality of first engagement members 54A and the plurality of second engagement members 54B are combined into a plurality of sets of two each, and are alternately arranged on the same circumference.

  For example, one first engagement member 54A and one second engagement member 54B are disposed in the first tapered space 81A and the second tapered space 81B, respectively. The first engaging member 54A in the first tapered space 81A and the first engaging member 54A in the second tapered space 81B are adjacent to each other with one missing surface 52d interposed therebetween. Further, the second engaging member 54B in the first tapered space 81A and the second engaging member 54B in the second tapered space 81B are adjacent to each other with one missing surface 52d interposed therebetween. .

  As described above, each pair of first engagement members 54A includes the space between the inner peripheral surface 53b of the second rotating body 53 and the first engaging surface 52e, the inner peripheral surface 53b of the second rotating body 53, and the Between the two engaging surfaces 52f, they are positioned separately one by one. Furthermore, each set of first engagement members 54A is held while its circumferential position is regulated by the plurality of first holding portions 58A, and the respective first biasing members are separated in the direction away from each other. It is powered by 82A. The first biasing member 82A is configured by, for example, a compression coil spring.

  Similarly, each pair of second engagement members 54B is provided between the inner peripheral surface 53b of the second rotating body 53 and the first engaging surface 52e, and the inner peripheral surface 53b of the second rotating body 53 and the second It is separately located one by one between the engaging surface 52f. Further, each pair of second engagement members 54B is held while its circumferential position is regulated by the plurality of second holding portions 58B, and the second biasing members are respectively separated in the direction away from each other It is powered by 82B. The second biasing member 82B is constituted by, for example, a compression coil spring.

  The plurality of first engagement members 54A and the plurality of second engagement members 54B are restricted from moving in the axial direction with respect to the first rotating body 52 and the second rotating body 53. Each missing surface 52d of the first rotary body 52 has a relief 52g which is recessed so as not to interfere with the first biasing member 82A or the second biasing member 82B.

  As shown in FIGS. 2 and 3, the first armature 55A is a disk-like member provided on the first rotary body 52 so as to be restricted in relative rotation and capable of relative movement in the axial direction, , And a plurality of first holding portions 58A. For example, the first armature 55A is serrated or splined to the first shaft 61.

  As shown in FIG. 2, the first rotor 56A is provided on the first rotor 52 with both relative rotation and relative movement in the axial direction restricted, and has a rotor surface 56Aa facing the first armature 55A. It consists of a magnetic material.

  As shown in FIG. 2, the first electromagnet 57A faces the first armature 55A with the first rotor 56A interposed therebetween, and displaces the first armature 55A in the axial direction. Specifically, the first electromagnet 57A is located on the opposite side to the first armature 55A with respect to the first rotor 56A, and the displacement with respect to the first rotor 56A is regulated, and the rotation center of the first rotating body 52 is It is an annular member based on the line CL. The first electromagnet 57A includes a field core 57A1 fixed to the case 51 and an electromagnetic coil 57A2 wound around the field core 57A1.

  As shown in FIGS. 2 and 3, the plurality of first holding portions 58A extend from the first armature 55A to the opposite side to the first rotor 56A, and hold the plurality of first engagement members 54A. .

  As shown in FIGS. 2 and 3, the second armature 55 </ b> B is located between the first rotating body 52 and the bottom plate 53 a of the second rotating body 53. The second armature 55B is a disk-like member which is restricted in relative rotation and capable of relative movement in the axial direction on the second rotary body 53, and has a plurality of second holding portions 58B. doing. For example, the second armature 55B is serrated or splined to the second shaft 62.

  As shown in FIG. 2, the second rotor 56 </ b> B is provided on the second rotating body 53 so as to restrict both relative rotation and relative movement in the axial direction, and has a rotor surface 56 </ b> Ba facing the second armature 55 </ b> B. It consists of a magnetic material. For example, the second rotor 56B is configured by the bottom plate 53a of the second rotating body 53.

  As shown in FIG. 2, the second electromagnet 57B faces the second armature 55B with the second rotor 56B interposed therebetween, and displaces the second armature 55B in the axial direction. Specifically, the second electromagnet 57B is located on the opposite side to the second armature 55B with respect to the second rotor 56B, and the displacement with respect to the second rotor 56B is restricted, and the center of rotation of the first rotating body 52 is It is an annular member based on the line CL. The second electromagnet 57B includes a field core 57B1 fixed to the case 51 and an electromagnetic coil 57B2 wound around the field core 57B1.

  As shown in FIGS. 2 and 3, the plurality of second holding portions 58B extend from the second armature 55B to the opposite side to the second rotor 56B, and hold the plurality of second engagement members 54B. .

  Next, the plurality of first holding portions 58A and the plurality of second holding portions 58B will be described in detail with reference to FIGS. 2 to 4 and 6.

  The plurality of first holding portions 58A are formed by the plurality of columns extending from the first armature 55A in the opposite direction to the first rotor 56A (that is, extending into the first tapered space portions 81A and 81A). It is configured. Hereinafter, the first holding portion 58A will be referred to as "first pillar portion 58A" as appropriate. The plurality of first column portions 58A are arranged at an equal pitch circumferentially along the edge of the disk-shaped first armature 55A. Each first pillar portion 58A has a first inclined surface 58Aa formed on the side surface in the direction of rotation with the first armature 55A. The first inclined surface 58Aa causes the first engagement member 54A to engage with the inner circumferential surface 53b and the first engagement surface 52e as the first armature 55A approaches the rotor surface 56Aa of the first rotor 56A. It is inclined to

  More specifically, for example, four first column portions 58A are configured in a set of two each. One of the pair of first pillars 58A, 58A extends into the first tapered space 81A, and the other extends into the second tapered space 81B. The surfaces 58Aa, 58Aa of the pair of first pillars 58A, 58A facing each other are in the form of slopes (that is, they constitute the first slopes 58Aa, 58Aa). The inclination directions of the pair of first slopes 58Aa and 58Aa are directions in which the pair of first pillars 58A and 58A approach each other as they extend from the first armature 55A into the tapered spaces 81A and 81B. In other words, the pair of first slopes 58Aa, 58Aa facing each other form a taper (female taper) that tapers as the distance from the first armature 55A increases.

  The pair of first engaging members 54A, 54A biased by the first biasing member 82A is sandwiched by the pair of first inclined surfaces 58Aa, 58Aa. As described above, the pair of first engagement members 54A, 54A includes the first engagement member 54A in the first tapered space 81A and the first engagement member in the second tapered space 81B. 54A and are adjacent to each other across one missing surface 52d.

  A plurality of first sliders 83A intervene between the plurality of first engagement members 54A and the plurality of first slopes 58Aa. The plurality of first sliders 83A have slopes 83Aa along the plurality of first slopes 58Aa. Therefore, the first engagement member 54A can hit without tilting to the first slope 58Aa. The first engagement member 54A can be disposed more stably between the first slopes 58Aa and 58Aa.

  The plurality of second holding portions 58B have the same configuration except that they are disposed in the opposite direction with respect to the plurality of first holding portions 58A. That is, the plurality of second holding portions 58B extend from the second armature 55B in the opposite direction to the second rotor 56B (that is, extend into the first tapered space portions 81A and 81A). It is composed of parts. Hereinafter, the second holding portion 58B is appropriately rephrased as "second column portion 58B". The plurality of second column portions 58B are arranged at an equal pitch circumferentially along the edge of the disk-shaped second armature 55B. Each second pillar portion 58B has a second slope 58Ba formed on the side surface in the direction of rotation with the second armature 55B. The second inclined surface 58Ba engages the second engagement member 54B with the inner peripheral surface 53b and the first engagement surface 52e as the second armature 55B approaches the rotor surface 56Ba of the second rotor 56B. It is inclined to

  More specifically, for example, four second column portions 58B are configured in a set of two each. One of the pair of second columns 58B, 58B extends into the first tapered space 81A, and the other extends into the second tapered space 81B. The faces 58Ba, 58Ba of the pair of second column portions 58B, 58B facing each other are the configuration of the slopes (that is, they constitute the second slopes 58Ba, 58Ba). The inclination directions of the pair of second slopes 58Ba and 58Ba are directions in which the pair of second pillars 58B and 58B approach each other as they extend from the second armature 55B into the tapered spaces 81A and 81B. In other words, the pair of second slopes 58Ba and 58Ba facing each other form a taper (female taper) that tapers as the distance from the second armature 55B increases.

  The pair of second engaging members 54B and 54B biased by the second biasing member 82B is sandwiched by the pair of second inclined surfaces 58Ba and 58Ba. As described above, the pair of second engagement members 54B and 54B includes the second engagement member 54B in the first tapered space 81A and the second engagement member in the second tapered space 81B. 54B, which are adjacent to each other across one missing surface 52d.

  A plurality of second sliders 83B intervene between the plurality of second engagement members 54B and the plurality of second slopes 58Ba. The plurality of second sliders 83B have slopes 83Ba along the plurality of second slopes 58Ba. Therefore, the second engagement member 54B can hit without tilting with respect to the second slope 58Ba. The second engagement member 54B can be arranged more stably between the second inclined surfaces 58Ba and 58Ba.

  As shown in FIG. 2, the first armature 55A and the second armature 55B are located on both sides in the axial direction across the first rotary body 52, and the disc surfaces 52a and 52b of the first rotary body 52 (axial direction Both end faces 52a, 52b) are in contact. For this reason, the first armature 55A and the second armature 55B do not approach each other any more.

Next, the operation of the clutch 50 configured as described above will be described.
FIGS. 2, 4 and 6 show a state in which the electromagnetic coils 57A2 and 57B2 of the electromagnets 57A and 57B are not energized. As shown in FIG. 6, the plurality of first slopes 58Aa are biased by the biasing forces of the plurality of first biasing members 82A via the plurality of first engaging members 54A. For this reason, an axial component acts on each first slope 58Aa. This component force is a force that presses the first pillars 58A and the first armature 55A toward the second armature 55B. The tip end face of the first pillar portion 58A is in contact with the second armature 55B.

  The plurality of second slopes 58Ba are biased by the biasing forces of the plurality of second biasing members 82B via the plurality of second engaging members 54B. Therefore, an axial component acts on each of the second slopes 58Ba. This component force is a force that presses the second pillars 58B and the second armatures 55B toward the first armature 55A. The tip end face of the second pillar portion 58B is in contact with the first armature 55A.

  Therefore, as shown in FIGS. 2 and 6, the first armature 55A is located at the release position U1, and the second armature 55B is located at the release position D1, and the axial movement with respect to the first rotating body 52 Is regulated. In this state, each interval δ1 (first interval δ1) between each pair of first engagement members 54A and 54A and each pair of second engagement members 54B and 54B is large. As shown in FIG. 4, the engaging members 54A and 54B are in an open state with respect to the engaging surfaces 52e and 52f and the inner peripheral surface 53b of the second rotating body 53. As a result, the clutch 50 maintains the released state (unlocked state). The movement of the first armature 55A and the second armature 55B in the axial direction with respect to the first rotating body 52 is restricted.

  Thereafter, the electromagnetic coils 57A2 and 57B2 of the electromagnets 57A and 57B shown in FIG. 2 are energized. Since the electromagnets 57A and 57B are switched to the excited state, the magnetic force of the electromagnets 57A and 57B causes the first armature 55A to be attracted to the rotor surface 56Aa of the first rotor 56A, and the second armature 55B to be the second rotor 56B. It adsorbs to the rotor surface 56Ba.

  As a result, as shown in FIG. 7, the first armature 55A moves from the release position U1 to the engagement position U2. The first slopes 58Aa and 58Aa push the pair of first engagement members 54A and 54A in the direction of approaching each other against the biasing force of the first biasing member 82A. Further, the second armature 55B moves from the release position D1 to the engagement position D2. The second inclined surfaces 58Ba and 58Ba push the pair of second engagement members 54B and 54B in a direction in which they approach each other against the biasing force of the second biasing member 82B. Each interval δ2 (second interval δ2) between each pair of first engagement members 54A and 54A in a pressed state and each pair of second engagement members 54B and 54B is a state before being pressed. It becomes smaller than the first interval δ1 (see FIG. 6).

  For this reason, as shown in FIG. 8, each of the first engagement members 54A and each of the second engagement members 54B is opposed to each of the engagement surfaces 52e and 52f and the inner peripheral surface 53b of the second rotating body 53. Engage. As a result, the clutch 50 is switched to the engaged state (locked state).

  On the other hand, in the case where only one of the electromagnets 57A and 57B shown in FIG. 2, for example, the electromagnetic coil 57A2 of the first electromagnet 57A is energized, the operation is as follows. Since only the first electromagnet 57A is switched to the excited state, the magnetic force of the first electromagnet 57A causes the first armature 55A to be attracted to the rotor surface 56Aa of the first rotor 56A.

  As a result, as shown in FIG. 9, the first armature 55A moves from the release position U1 to the engagement position U2. The first slopes 58Aa and 58Aa push the pair of first engagement members 54A and 54A in the direction of approaching each other against the biasing force of the first biasing member 82A. However, the second armature 55B maintains the release position D1. Each spacing δ2 (second spacing δ2) between each pair of first engagement members 54A, 54A is smaller than the first spacing δ1 (see FIG. 6) before being pushed.

  For this reason, as shown in FIG. 10, the respective first engagement members 54A engage with the respective engagement surfaces 52e, 52f and the inner circumferential surface 53b of the second rotating body 53. As a result, the clutch 50 is switched to the engaged state (locked state).

  It will be as follows if the description of the clutch 50 of Example 1 is put together.

As shown in FIG. 2 to FIG.
A first rotating body 52 having a plurality of engaging surfaces 52e and 52f in the circumferential direction of the outer peripheral surface 52c;
A cylindrical second rotating body 53 surrounding the outer peripheral surface 52c of the first rotating body 52;
A plurality of first engagement members 54A and a plurality of interposing the plurality of engaging surfaces 52e and 52f of the first rotating body 52 and the inner circumferential surface 53b of the second rotating body 53 A second engagement member 54B,
The first rotary body 52 is provided with relative movement in the axial direction, and engages the plurality of first engagement members 54A with the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b. The first armature 55A,
A first electromagnet 57A facing the first armature 55A with the first rotor 56A interposed therebetween, and axially displacing the first armature 55A;
The first rotary body 52 is provided with relative movement in the axial direction, and engages the plurality of second engagement members 54B with the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b. A second armature 55B,
Both of the relative rotation and the relative movement in the axial direction are provided on any one of the first rotating body 52 and the second rotating body 53 with a rotor surface 56Ba facing the second armature 55B. A second rotor 56B made of a magnetic material,
And a second electromagnet 57B that faces the second armature 55B with the second rotor 56B interposed therebetween, and axially displaces the second armature 55B.

  Therefore, the first armature 55A is attracted to the first rotor 56A by the magnetic force generated by the first electromagnet 57A, and the plurality of first engagement members 54A are engaged with the plurality of engagement surfaces 52e and 52f and the first rotating body 52. It is engaged with the inner circumferential surface 53b. Therefore, the engagement state of the plurality of first engagement members 54A with respect to the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b can be maintained only by the first electromagnet 57A.

  In addition, the second armature 55B is attracted to the second rotor 56B by the magnetic force generated by the second electromagnet 57B, and the plurality of second engagement members 54B are engaged with the plurality of engagement surfaces 52e and 52f and the second rotating body 53. It is engaged with the inner circumferential surface 53b. Therefore, the engagement state of the plurality of second engagement members 54B with the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b can be maintained only by the second electromagnet 57B.

  As described above, the first rotating body 52 and the second rotating body 53 are engaged by the plurality of first engaging members 54A by the magnetic force generated by the first electromagnet 57A (first notch function). Further, the first rotating body 52 and the second rotating body 53 are engaged by the plurality of second engaging members 54B by the magnetic force generated by the second electromagnet 57B (second notch function). That is, the clutch 50 has a two-system clutch function. By energizing the electromagnetic coil of at least one electromagnet, the clutch 50 is engaged.

  Therefore, even when a failure occurs in any one of the two electromagnetic coils 57A2 and 57B2 and the two electric systems, that is, even when a primary failure occurs in the clutch 50, the engaged state and the released state of the clutch 50 Switching is possible. That is, the fail-safety of the clutch 50 can be enhanced. Moreover, in the normal use state in which the clutch 50 is released, no current is supplied to any of the electromagnetic coils 57A2 and 57B2. Therefore, power consumption can be suppressed.

Furthermore, as shown in FIG. 2 to FIG.
A plurality of first engagement members 54A engaged between the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b by energization of the first electromagnet 57A;
The plurality of second engagement members 54B engage between the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b by energization of the second electromagnet 57B.
Power transmission between the first rotating body 52 and the second rotating body 53 is enabled.

Furthermore, as shown in FIG. 2, FIG. 3, FIG. 4 and FIG.
The first armature 55A has a first holding portion 58A for holding the plurality of first engagement members 54A,
The second armature 55B has a second holding portion 58B for holding the plurality of second engagement members 54B,
The first holding portion 58A maintains the engagement state between the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b by the plurality of first engagement members 54A by the first electromagnet 57A. A first engagement state maintaining portion 84A (see FIGS. 3 and 6)
The second holding portion 58B maintains the engagement between the plurality of engagement surfaces 52e and 52f and the inner circumferential surface 53b by the second electromagnet 57B by the plurality of second engagement members 54B. And a second engagement state maintaining portion 84B (see FIGS. 3 and 6).

  Therefore, in a state where the first electromagnet 57A generates a magnetic force, the first engagement state maintaining unit 84A of the first armature 55A keeps maintaining the engagement state of the plurality of first engagement members 54A. In addition, in a state where the second electromagnet 57B generates a magnetic force, the second engagement state maintaining portion 84B of the second armature 55B keeps maintaining the engaged state of the plurality of second engagement members 54B. Therefore, even when a failure occurs in any one of the two electromagnetic coils 57A2 and 57B2 and the two electric systems, that is, even when a primary failure occurs in the clutch 50, the engaged state of the clutch 50 is maintained. You can continue. That is, the fail-safety of the clutch 50 can be enhanced.

Furthermore, as shown in FIGS.
The first holding portion 58A is constituted by a first pillar portion 58A which extends from the first armature 55A in a direction opposite to the first rotor 56A.
The first pillar portion 58A has a first slope 58Aa formed on the side surface in the direction of rotation with the first armature 55A,
The first inclined surface 58Aa moves the plurality of first engagement members 54A into the plurality of engagement surfaces 52e, 52f and the inside as the first armature 55A approaches the rotor surface 56Aa of the first rotor 56A. Inclined in the direction of engagement with the circumferential surface 53b,
The first engagement state maintaining portion 84A (see FIGS. 3 and 6) is constituted by the first inclined surface 58Aa,
The second holding portion 58B is constituted by a second pillar portion 58B which extends from the second armature 55B in a direction opposite to the second rotor 56B.
The second pillar portion 58B has a second inclined surface 58Ba formed on the side surface in the direction of rotation with the second armature 55B,
The second inclined surface 58Ba is configured such that, as the second armature 55B approaches the rotor surface 56Ba of the second rotor 56B, the plurality of second engagement members 54B are engaged with the plurality of engagement surfaces 52e, 52f and the inside. Inclined in the direction of engagement with the circumferential surface 53b,
The second engagement state maintaining portion 84B (see FIGS. 3 and 6) is constituted by the second inclined surface 58Ba.

  Therefore, the first engagement state maintaining portion 84A and the second engagement state maintaining portion 84B can be extremely simply configured by the slopes 58Aa and 58Ba.

More specifically, as shown in FIGS.
A first rotating body 52 having a plurality of first engaging surfaces 52e and a plurality of second engaging surfaces 52f alternately in the circumferential direction of the outer peripheral surface 52c ;
A cylindrical second rotating body 53 positioned on the rotation center line CL of the first rotating body 52 and surrounding an outer peripheral surface 52 c of the first rotating body 52 ;
A plurality of first engagement members 54A and a plurality of second engagement members 54B located on the plurality of first engagement surfaces 52e and the plurality of second engagement surfaces 52f;
The first rotary body 52 is provided so as to be capable of relative movement in the axial direction, and the plurality of first engagement members 54A are provided on the plurality of first engagement surfaces 52e and the inner circumferential surface of the second rotary body 53. 53b and a first armature 55A to be engaged with
A first rotor 56A made of a magnetic material provided on the first rotary body 52 with both relative rotation and relative movement in the axial direction restricted and having a rotor surface 56Aa facing the first armature 55A;
A first electromagnet 57A facing the first armature 55A with the first rotor 56A interposed therebetween, and axially displacing the first armature 55A;
A plurality of first holding portions 58A extending from the first armature 55A to the opposite side to the first rotor 56A and holding the plurality of first engagement members 54A;
The relative rotation is restricted and relative movement in the axial direction is provided to any one of the first rotating body 52 and the second rotating body 53, and the plurality of second engagement members 54B A second armature 55B engaged with the second engagement surface 52f and the inner circumferential surface 53b;
A second rotor 56B made of a magnetic body provided with a rotor surface 56Ba facing the second armature 55B, provided on the second rotary body 53 so as to restrict both relative rotation and relative movement in the axial direction;
A second electromagnet 57B facing the second armature 55B with the second rotor 56B interposed therebetween, and axially displacing the second armature 55B;
And a plurality of second holding portions 58B extending from the second armature 55B to the opposite side to the second rotor 56B and holding the plurality of second engagement members 54B,
The plurality of first engagement members 54A and the plurality of second engagement members 54B are combined into a plurality of sets of two each, and are alternately arranged on the same circumference,
The pair of first engagement members 54A are disposed between the inner peripheral surface 53b of the second rotating body 53 and the first engaging surface 52e, and the inner peripheral surface 53b of the second rotating body 53 and the above Between the second engaging surface 52f, one by one, and while being held while being regulated in position in the circumferential direction by the plurality of first retaining portions 58A, they are individually separated in the direction away from each other Biased by the first biasing member 82A of the
The pair of second engagement members 54B includes the space between the inner peripheral surface 53b of the second rotary body 53 and the first engagement surface 52e, and the inner peripheral surface 53b of the second rotary body 53 and the inner peripheral surface 53b. Positioned separately one by one between the second engagement surface 52f and being held while being regulated in position in the circumferential direction by the plurality of second holding portions 58B, and separately from each other in a direction away from each other Biased by the second biasing member 82B of the
The plurality of first holding portions 58A have a plurality of first inclined surfaces 58Aa formed on side surfaces in the direction of rotation with the first armature 55A,
It said plurality of first inclined surfaces 58Aa, the as first armature 55A approaches to the rotor surface 56Aa of the first rotor 56A, the plurality of first engagement member 54A of the plurality of engagement surfaces 52e, 52f ( Inclined in a direction to be engaged with the plurality of first engagement surfaces 52e and the plurality of second engagement surfaces 52f) and the inner circumferential surface 53b,
The plurality of second holding portions 58B have a plurality of second inclined surfaces 58Ba formed on side surfaces in the direction of rotation with the second armature 55B,
It said plurality of second inclined surface 58Ba, the as second armature 55B approaches the rotor surface 56Ba of the second rotor 56B, the plurality of second engagement member 54B of the plurality of engagement surfaces 52e, 52f ( It inclines in the direction to be engaged with the plurality of first engagement surfaces 52e and the plurality of second engagement surfaces 52f) and the inner circumferential surface 53b.

  Therefore, even when a failure occurs in one of the two electromagnetic coils 57A2 and 57B2 and two electric systems, that is, even when a primary failure occurs in the clutch 50, the engagement state and the release of the clutch 50 are released. It is possible to switch between states. That is, the fail-safety of the clutch 50 can be enhanced. Moreover, in the normal use state in which the clutch 50 is released, no current is supplied to any of the electromagnetic coils 57A2 and 57B2. Therefore, power consumption can be suppressed.

Furthermore, as shown in FIGS. 3 and 6,
The pair of first slopes 58Aa, 58Aa facing each other form a taper (female taper) which becomes tapered as it is separated from the first armature 55A,
The pair of first engaging members 54A, 54A biased by the first biasing member 82A is sandwiched by the pair of first inclined surfaces 58Aa, 58Aa.

  Therefore, when the first armature 55A moves between the release position U1 and the engagement position U2, the pair of first engagement members 54A, 54A biased by the first biasing member 82A can be It can be displaced in the direction of approaching each other and in the direction of separating. Therefore, as shown in FIG. 4, the pair of first engagement members 54A, 54A are engaged with the engagement surfaces 52e, 52f and the inner peripheral surface 53b of the second rotating body 53 (see FIG. 4). It can be switched between the locked state) and the released state (unlocked state).

  Thus, the first armature 55A has a plurality of first holding portions 58A, each first holding portion 58A has a first slope 58Aa, and is tapered by a pair of first slopes 58Aa and 58Aa facing each other ( The plurality of first engagement members 54A can be reliably displaced in the engagement direction and in the release direction by a simple structure with a small number of parts that only constitutes the female taper). Therefore, the clutch 50 can be made simple and inexpensive, and the clutch 50 can be miniaturized. The same applies to the plurality of second slopes 58Ba.

Furthermore, as shown in FIG. 3, FIG. 4 and FIG.
A plurality of first sliders 83A interposed between the plurality of first slopes 58Aa and the plurality of first engagement members 54A;
And a plurality of second sliders 83B interposed between the plurality of second slopes 58Ba and the plurality of second engagement members 54B,
The plurality of first sliders 83A have slopes 83Aa along the plurality of first slopes 58Aa,
The plurality of second sliders 83B have slopes 83Ba along the plurality of second slopes 58Ba.

  Therefore, the plurality of first sliders 83A and the plurality of second sliders 83B can regulate the respective engaging members 54A and 54B so as not to be inclined by the respective slopes 58Aa and 58Ba. Therefore, the engagement state or non-engagement state of each engagement member 54A, 54B with respect to the plurality of engagement surfaces 52e, 52f and the inner circumferential surface 53b of the first rotating body 52 can be maintained more reliably. it can.

Furthermore, as shown in FIG.
The plurality of first engaging members 54A enable power transmission between the first rotating body 52 and the second rotating body 53 by the magnetic force generated by the first electromagnet 57A.
The plurality of second engagement members 54B enable power transmission between the first rotating body 52 and the second rotating body 53 by the magnetic force generated by the second electromagnet 57B.

  Therefore, it is only necessary to energize one or both of the two electromagnetic coils 57A2 and 57B2 only when the clutch 50 is used in the engaged state. Therefore, the power consumption can be suppressed.

Example 2
The clutch 150 of the second embodiment will be described with reference to FIG. The clutch 150 of the second embodiment is characterized in that the second rotor 56B and the second electromagnet 57B of the clutch 50 of the first embodiment shown in FIGS. 1 to 10 are changed to a second rotor 156B and a second electromagnet 157B. Since the other configuration is the same as that of the first embodiment, the same reference numerals are given and the description is omitted.

  The second rotor 156B has the same basic configuration as the first rotor 56A and the second rotor 56B of the first embodiment, and has the same function as that of the second rotor 56B. More specifically, the second rotor 156B is provided on the first rotor 52 with both relative rotation and relative movement in the axial direction restricted, and is made of a magnetic material having a rotor surface 156Ba facing the second armature 55B. Become.

  The second electromagnet 157 </ b> B can rotate together with the first rotating body 52. Specifically, the second electromagnet 157B faces the second armature 55B with the second rotor 156B interposed therebetween, and displaces the second armature 55B in the axial direction. Specifically, the second electromagnet 157B is located on the opposite side to the second armature 55B with respect to the second rotor 156B, and the displacement with respect to the second rotor 156B is restricted, and the center of rotation of the first rotating body 52 is It is an annular member based on the line CL.

  The second electromagnet 157B is provided on the first rotating body 52 (more specifically, the second shaft portion 62 of the first rotating body 52) while restricting both relative rotation and relative movement in the axial direction. And an electromagnetic coil 157B2 wound around the field core 157B1. The field core 157B1 and the bottom plate 53a of the second rotating body 53 are supported by the bearing 173 so as to be able to rotate relative to each other. The second electromagnet 157B has the same basic configuration as the second electromagnet 57B of the clutch 50 of the first embodiment, and has the same function as that of the second electromagnet 57B.

  In the second embodiment, it is preferable that the first shaft 33 and the first rotating body 52 have the through holes 174. The through hole 174 is located on the rotation center line CL of the first rotating body 52. The electrical cable 175 connected to the electromagnetic coil 157B2 can be pulled out through the through hole 174.

  The actions and effects of the second embodiment are the same as those of the first embodiment.

Example 3
A clutch 250 of the third embodiment will be described with reference to FIG. The clutch 250 of the third embodiment is characterized in that the electromagnetic coils 57A2 and 57B2 of the electromagnets 57A and 57B of the clutch 50 of the first embodiment shown in FIGS. 1 to 10 are changed to electromagnetic coils 257A2 and 257B2. Since the other configuration is the same as that of the first embodiment, the same reference numerals are given and the description is omitted.

  The electromagnetic coil 257A2 of the first electromagnet 57A is configured of a first coil 291 and a second coil 292, which form two systems. Similarly, the electromagnetic coil 257B2 of the second electromagnet 57B is also configured by a first coil 291 and a second coil 292, which form two systems. Thus, the electromagnetic coils 257A2 and 257B2 have a double winding structure of the first coil 291 and the second coil 292. For example, only one of the first coil 291 and the second coil 292 is selected and energized. In addition, you may supply with electricity to both the 1st coil 73a and the 2nd coil 73b.

  As described above, the electromagnetic coil 257A2 of the first electromagnet 57A is configured by the first coil 291 and the second coil 292, which form two systems. Therefore, even when a failure occurs in either one of the first coil 291 and the second coil 292, it is possible to compensate each other by switching to the other coil or control system (that is, to make it redundant). it can). As a result, drive control of the clutch 250 can be continued. The other actions and effects of the third embodiment are the same as those of the first embodiment. The clutch 250 of the third embodiment can be combined with the clutch 150 of the second embodiment.

  The clutches 50, 150, and 250 according to the present invention are not limited to the embodiments as long as the functions and effects of the present invention are exhibited. For example, the application of the clutches 50, 150, and 250 is not limited to the vehicle steering device 10, and can be used for transportation devices such as various vehicles and industrial machines.

  Further, the outer peripheral surface 52c of the first rotating body 52 may have a polygonal shape, and is not limited to the shape having the missing surfaces 52d at the four corners of the square. The number of first engagement members 54A and the number of second engagement members 54B can be arbitrarily set in accordance with the number of engagement surfaces 52e and 52f. Further, the shapes of the engagement surfaces 52e and 52f are not limited to flat surfaces, and may be, for example, arc surfaces.

  In addition, the first armature 55A and the second armature 55B may have a configuration that allows relative movement in the axial direction with respect to the first rotating body 52, and may be serrated or splined to the first shaft 61. It is not limited to the combined configuration. For example, by adjusting the shape and size of the first rotating body 52, the same action can be obtained.

  The clutches 50, 150, and 250 of the present invention are suitable for use in a steer-by-wire vehicle steering apparatus.

DESCRIPTION OF SYMBOLS 50 clutch 52 1st rotary body 52c Outer peripheral surface 52e of 1st rotary body 52e 1st engagement surface 52f 2nd engagement surface 53 2nd rotary body 53b Inner peripheral surface 54A of 1st rotary body 1st engagement member 54B 2nd Engaging member 55A first armature 55B second armature 56A first rotor 56Aa rotor surface 56B second rotor 56Ba rotor surface 57A first electromagnet 57B second electromagnet 58A first holding portion (first column portion)
58Aa 1st slope 58B 2nd holding part (2nd pillar part)
58Ba Second slope 82A First biasing member 82B Second biasing member 83A First slider 83Aa Slope 83B Second slider 83Ba Slope 84A First engagement state maintaining portion 84B Second engagement state maintaining portion 150 Clutch 156B Second rotor 156Ba Rotor face 157B 2nd electromagnet 250 clutch CL 1st rotation center line of rotation

Claims (7)

A first rotating body having a plurality of engaging surfaces in the circumferential direction of the outer peripheral surface;
A cylindrical second rotating body surrounding the outer peripheral surface of the first rotating body;
A plurality of first engagement members and a plurality of second engagement members interposed between the plurality of engagement surfaces of the first rotating body and the inner circumferential surface of the second rotating body;
A first armature which is provided on the first rotary body so as to be capable of relative movement in the axial direction, and which engages the plurality of first engagement members with the plurality of engagement surfaces and the inner circumferential surface;
A first rotor made of a magnetic body provided on the first rotor with both relative rotation and relative movement in the axial direction restricted and having a rotor surface facing the first armature;
A first electromagnet facing the first armature with the first rotor interposed therebetween, and axially displacing the first armature;
A second armature which is provided on the first rotary body so as to be capable of relative movement in the axial direction, and which engages the plurality of second engagement members with the plurality of engagement surfaces and the inner circumferential surface;
It is provided on either one of the first rotating body and the second rotating body while restricting both relative rotation and relative movement in the axial direction, and it comprises a magnetic body having a rotor surface facing the second armature. The second rotor,
A second electromagnet facing the second armature with the second rotor interposed therebetween, and axially displacing the second armature;
A clutch characterized in that. The plurality of first engagement members engage between the plurality of engagement surfaces and the inner circumferential surface by energization of the first electromagnet,
The plurality of second engagement members engage between the plurality of engagement surfaces and the inner circumferential surface by energization of the second electromagnet,
Enable power transmission between the first and second rotating bodies,
The clutch according to claim 1. The first armature has a first holding portion holding the plurality of first engagement members,
The second armature has a second holding portion that holds the plurality of second engagement members,
The first holding unit is configured to maintain a state of engagement between the plurality of engagement surfaces and the inner circumferential surface by the plurality of first engagement members by energization of the first electromagnet. Has a state maintenance unit,
The second holding portion is configured to maintain a state of engagement between the plurality of engagement surfaces and the inner circumferential surface by the plurality of second engagement members by energization of the second electromagnet. Has a state maintenance unit,
The clutch according to claim 2. The first holding portion is constituted by a first post extending from the first armature in a direction opposite to the first rotor,
The first column portion has a first slope formed on a side surface in a direction of rotation with the first armature,
The first inclined surface is a direction in which the plurality of first engagement members are engaged with the plurality of engagement surfaces and the inner circumferential surface as the first armature approaches the rotor surface of the first rotor. Inclined to
The first engagement state maintaining portion is constituted by the first slope,
The second holding portion is constituted by a second post extending from the second armature in a direction opposite to the second rotor.
The second column portion has a second slope formed on the side surface in the direction of rotation with the second armature,
The second inclined surface is a direction in which the plurality of second engagement members are engaged with the plurality of engagement surfaces and the inner circumferential surface as the second armature approaches the rotor surface of the second rotor. Inclined to
The second engagement state maintaining portion is constituted by the second inclined surface,
The clutch according to claim 3. A first rotating body having a plurality of first engaging surfaces and a plurality of second engaging surfaces alternately in the circumferential direction of the outer peripheral surface ;
A cylindrical second rotating body located on a rotation center line of the first rotating body and surrounding an outer peripheral surface of the first rotating body;
A plurality of first engagement members and a plurality of second engagement members positioned on the plurality of first engagement surfaces and the plurality of second engagement surfaces;
The first rotating body is provided so as to be capable of relative movement in the axial direction, and the plurality of first engaging members are engaged with the plurality of first engaging surfaces and the inner circumferential surface of the second rotating body. The first armature,
A first rotor made of a magnetic body provided on the first rotor with both relative rotation and relative movement in the axial direction restricted and having a rotor surface facing the first armature;
A first electromagnet facing the first armature with the first rotor interposed therebetween, and axially displacing the first armature;
A plurality of first holding portions extending from the first armature to a side opposite to the first rotor and holding the plurality of first engagement members;
The relative rotation is restricted and relative movement in the axial direction is provided on any one of the first rotating body and the second rotating body, and the plurality of second engagement members A second armature engaged with the joint surface and the inner circumferential surface;
A second rotor comprising a magnetic body provided on the second rotor with both relative rotation and relative movement in the axial direction restricted and having a rotor surface facing the second armature;
A second electromagnet facing the second armature with the second rotor interposed therebetween, and axially displacing the second armature;
And a plurality of second holding portions extending from the second armature to the opposite side to the second rotor and holding the plurality of second engagement members.
The plurality of first engagement members and the plurality of second engagement members are combined into a plurality of sets of two each and are alternately arranged on the same circumference,
The respective one set of first engagement members are disposed between the inner peripheral surface of the second rotating body and the first engaging surface, the inner peripheral surface of the second rotating body, and the second engaging surface Between the two, one by one, separately from each other by the plurality of first holding portions while being restricted from one another in the circumferential direction, and given by the respective first biasing members in the directions away from each other. Are powered and
Each of the pair of second engagement members is between the inner peripheral surface of the second rotating body and the first engaging surface, the inner peripheral surface of the second rotating body, and the second engaging surface Between the two, one by one, and being held while being restricted in circumferential position from one another by the plurality of second holding parts, and provided with individual second biasing members in directions away from one another. Are powered and
The plurality of first holding portions have a plurality of first slopes formed on side surfaces in the direction of rotation with the first armature,
The plurality of first inclined surfaces are configured to receive the plurality of first engagement members as the plurality of first engagement surfaces and the plurality of second engagements as the first armature approaches the rotor surface of the first rotor. Inclined in the direction of engagement with the mating surface and the inner circumferential surface,
The plurality of second holding portions have a plurality of second slopes formed on the side surface in the direction of rotation with the second armature,
The plurality of second inclined surfaces are configured to receive the plurality of second engagement members as the plurality of first engagement surfaces and the plurality of second engagements as the second armature approaches the rotor surface of the second rotor. Sloped in the direction of engagement with the mating surface and the inner circumferential surface,
A clutch characterized by A plurality of first sliders interposed between the plurality of first slopes and the plurality of first engagement members;
And a plurality of second sliders interposed between the plurality of second slopes and the plurality of second engagement members,
The plurality of first sliders have slopes along the plurality of first slopes,
The plurality of second sliders have slopes along the plurality of second slopes.
The clutch according to claim 4 or 5. The clutch of claim 5 or claim 6 is
The plurality of first engagement members enable power transmission between the first rotating body and the second rotating body by the magnetic force generated by the first electromagnet,
The plurality of second engagement members can transmit power between the first rotating body and the second rotating body by the magnetic force generated by the second electromagnet.

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