Clutch device

Abstract

A movable clutch (70) is provided so as to be capable of moving relative to a first transmission portion (110) in an axial direction by means of the driving of a fork (50), and can permit the transmission of torque between the first transmission portion (110) and a second transmission portion (120) by engaging with a fixed clutch (60). A coupling portion (80) couples an actuator (30) and the fork (50), and is capable of transmitting a driving force of the actuator (30) to the fork (50). A clutch housing (20) accommodates at least the fork (50) and the coupling portion (80). A fork support portion (501) is provided to the clutch housing (20) so as to be capable of supporting the fork (50). The coupling portion (80) has an engaging portion (82). The fork (50) has an engaged portion (52) that engages with the engaging portion (82). In a predetermined direction (x1), the length (d1) of the gap (S1) between the fork (50) and the movable clutch (70) is greater than the length (d2) of an engagement portion (E1) between the engaging portion (82) and the engaged portion (52).

Description

Clutch device Cross-reference to related applications 【0001】 This application is based on Patent Application No. 2024-213798 filed on December 6, 2024, the content of which is incorporated herein by reference. 【0002】 This disclosure relates to a clutch device. 【0003】 Conventionally, a clutch device that changes the engagement state of a clutch portion by the driving force of an actuator is known. For example, in the clutch device of Patent Document 1, a fork is driven by the driving force of an actuator, and the engagement state of the clutch portion is changed by driving the fork. 【0004】 International Publication No. 2024 / 160541 【0005】 In the clutch device of Patent Document 1, when assembling the members, first, the fork is arranged in the housing, the joint is assembled to the fork from a predetermined direction, the shaft of the solenoid as the actuator is assembled to the joint from a predetermined direction, the bolt is assembled to the joint from a predetermined direction, and the joint and the shaft are fixed. Therefore, when assembling the bolt, a space for the assembling operation is required in a predetermined direction, and manufacturing is difficult. 【0006】 An object of the present disclosure is to provide a clutch device that is easy to manufacture. 【0007】 The clutch device according to the present disclosure includes a first transmission portion, a second transmission portion, an actuator, a fork, a fixed clutch, a movable clutch, a connecting portion, a housing, and a fork support portion. The second transmission portion is provided so as to be relatively rotatable with respect to the first transmission portion. The fork is driven by the driving force of the actuator. The fixed clutch is fixed to the second transmission portion. The movable clutch is provided so as to be axially relatively movable with respect to the first transmission portion by driving the fork, and allows the transmission of torque between the first transmission portion and the second transmission portion by engaging with the fixed clutch. 【0008】The connecting portion connects the actuator and the fork, and is capable of transmitting the actuator's driving force to the fork. The housing accommodates at least the fork and the connecting portion. The fork support portion is provided in the housing so as to be able to support the fork. The connecting portion has an engaging portion. The fork has an engaged portion that engages with the engaging portion. 【0009】 In a given direction, the length of the gap between the fork and the movable clutch is greater than the length of the engagement portion between the engaging portion and the engaged portion. Therefore, during the assembly of parts in the manufacturing process of the clutch device, an assembly method can be adopted in which, with the fork and the movable clutch in contact in a given direction, the engaging portion of the connecting part is positioned relative to the engaged portion of the fork, and the fork is moved away from the movable clutch to engage the engaging portion with the engaged portion. This eliminates the need for bolts to fix the joint as a connecting portion and the solenoid shaft as an actuator, which are required in conventional clutch devices, and also eliminates the need for space for bolt assembly work. 【0010】The above-mentioned and other purposes, features and advantages of this disclosure will become clearer from the following detailed description with reference to the accompanying drawings. The drawings are: Figure 1 is a schematic diagram showing a clutch device according to a first embodiment and a vehicle to which it is applied; Figure 2 is a cross-sectional view showing a clutch device according to a first embodiment; Figure 3 is a diagram showing the coupling portion of the clutch device according to a first embodiment and the surrounding components thereof; Figure 4 is a cross-sectional view of line IV-IV of Figure 3; Figure 5A is a schematic diagram showing the engaging portion and engaged portion of the clutch device according to a first embodiment when the electromagnetic coil is not energized; Figure 5B is a diagram showing the engaging portion and engaged portion of the clutch device according to a first embodiment. Figure 6A is a schematic diagram showing the electromagnetic coil when energized, Figure 6B is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the first step, Figure 6C is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the third step, Figure 7A is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the fourth step, Figure 7B is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the fifth step, Figure 8A is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the sixth step, Figure 8B is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the sixth step, Figure 9A is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the seventh step, Figure 9B is a diagram showing the manufacturing process of the clutch device according to the first embodiment and shows the seventh step, and Figure 10A is a clutch device according to the first embodiment Figure 10B is a diagram showing the manufacturing process of the clutch device according to the first embodiment, showing the ninth step, Figure 11 is a diagram showing the connecting part of the clutch device according to the second embodiment and the surrounding parts thereof, Figure 12 is a diagram showing the connecting part of the clutch device according to the second embodiment and the surrounding parts thereof, Figure 13 is a diagram showing the connecting part of the clutch device according to the second embodiment and the surrounding parts thereof, Figure 14 is a diagram showing the connecting part of the clutch device according to the second embodiment and,Figure 15A is a perspective view showing the surrounding components of the clutch device according to the third embodiment, Figure 15B is a perspective view showing the surrounding components of the clutch device according to the fourth embodiment, Figure 16 is a cross-sectional view showing the clutch device according to the fifth embodiment, and Figure 17 is a cross-sectional view showing the clutch device according to the sixth embodiment. 【0011】 The following describes clutch devices according to multiple embodiments, based on the drawings. In addition, substantially identical components in multiple embodiments are denoted by the same reference numerals, and their descriptions are omitted. 【0012】 (First Embodiment) Figure 1 shows a clutch device according to the first embodiment and a vehicle to which it is applied. The clutch device 10 is mounted on a vehicle 1, such as an electric vehicle. 【0013】 Vehicle 1 is equipped with a motor generator 2, a reduction gear 17, a differential 9, a differential shaft 11, an axle case 16, a clutch device 10, a wheel shaft 12, a wheel 13, a wheel shaft 14, a wheel 15, and an electronic control unit (hereinafter referred to as "ECU") 100 as a "control unit". 【0014】 The motor generator 2 is used as a drive source for the vehicle 1 and can output torque when energized. The motor generator 2 can generate electricity through regenerative operation. The reduction gear 17 can reduce the torque from the motor generator 2. The differential 9 is a differential gear that distributes the torque from the reduction gear 17 to the wheels 13 and 15. The clutch device 10 is installed between the differential 9 and the wheels 13 and is used to allow or interrupt the transmission of torque between the differential 9 and the wheels 13. 【0015】More specifically, the reduction gear 17 includes a first gear shaft 3, a second gear shaft 4, a first small-diameter gear 5, a first large-diameter gear 6, a second small-diameter gear 7, and a second large-diameter gear 8. The first gear shaft 3 is connected to the motor generator 2 and is rotatable in conjunction with the rotation of the motor generator 2. The first small-diameter gear 5 is mounted coaxially with the first gear shaft 3 so as to be rotatable in conjunction with the first gear shaft 3. The second gear shaft 4 is mounted parallel to the first gear shaft 3. The first large-diameter gear 6 has a larger outer diameter than the first small-diameter gear 5, is rotatable with the first small-diameter gear 5, and is mounted coaxially with the second gear shaft 4 so as to be rotatable in conjunction with the second gear shaft 4. The second small-diameter gear 7 has a smaller outer diameter than the first large-diameter gear 6 and is mounted coaxially with the second gear shaft 4 so that it can rotate integrally with the second gear shaft 4. The second large-diameter gear 8 has a smaller outer diameter than the second small-diameter gear 7 and is mounted so that it can mesh with the second small-diameter gear 7. With this configuration, the torque from the motor generator 2 is reduced by the reduction gear 17 and output from the second large-diameter gear 8. 【0016】 Here, "coaxial" does not refer only to a state where the axes of both are strictly aligned, but also includes states where they slightly intersect within the limits of errors or common technical knowledge, and states where they are approximately parallel (the same applies hereinafter). 【0017】 The differential 9 is configured to connect to the second large-diameter gear 8. One end of the differential shaft 11 is configured to connect to the differential 9. 【0018】 The axle case 16 is formed to accommodate, for example, a motor generator 2, a reduction gear 17, a differential 9, a differential shaft 11, etc., and is provided on the vehicle 1. 【0019】 The clutch device 10 is mounted on the axle case 16. The first transmission unit 110 (described later) of the clutch device 10 is connected to the other end of the differential shaft 11. The second transmission unit 120 (described later) of the clutch device 10 is connected to one end of the wheel shaft 12. The other end of the wheel shaft 12 is connected to the wheel 13. Here, the wheel 13 is, for example, the rear left wheel of the vehicle 1. 【0020】One end of the wheel shaft 14 is connected to the differential 9. The other end of the wheel shaft 14 is connected to the wheel 15. Here, the wheel 15 is, for example, the rear right wheel of the vehicle 1. 【0021】 With the above configuration, when the clutch device 10 allows torque transmission between the first transmission unit 110 connected to the differential shaft 11 and the second transmission unit 120 connected to the wheel shaft 12, torque transmission between the motor generator 2 and the wheels 13 and 15 is permitted, allowing the vehicle 1 to run or the motor generator 2 to perform regenerative operation. 【0022】 The ECU 100 is a small computer having a CPU as a calculation means, ROM, RAM, etc. as storage means, and I / O as input / output means. Based on information such as signals from various sensors installed in various parts of the vehicle 1, the ECU 100 performs calculations according to a program stored in the ROM, etc., and controls the operation of various devices and equipment of the vehicle 1. In this way, the ECU 100 executes a program stored in a non-transitional physical recording medium. When this program is executed, the method corresponding to the program is executed. 【0023】 The ECU 100 can control the operation of the motor generator 2 based on information such as signals from various sensors. Furthermore, the ECU 100 can control the operation of the clutch device 10 by controlling the operation of the actuator 30, which will be described later. 【0024】 As shown in Figure 2, the clutch device 10 includes a clutch housing 20 as a "housing", an actuator 30, a fork 50, a fork support 501, a clutch section 130, a first transmission section 110, a second transmission section 120, a connecting section 80, and the like. 【0025】The clutch housing 20 includes a clutch housing cylindrical portion 21, a clutch housing bottom portion 22, a clutch housing hole portion 201, an extendable cylindrical portion 202, etc. The clutch housing cylindrical portion 21 is formed in a cylindrical shape, for example, from metal. The clutch housing bottom portion 22 is formed integrally with the clutch housing cylindrical portion 21 so as to close one end of the clutch housing cylindrical portion 21. 【0026】 The clutch housing hole 201 is formed in the clutch housing bottom 22 so as to connect the inside and outside of the clutch housing 20. The extension cylinder portion 202 is formed integrally with the clutch housing bottom 22 so as to extend cylindrically from the clutch housing bottom 22 to the opposite side of the clutch housing cylinder portion 21. Here, the space inside the extension cylinder portion 202 is in communication with the space inside the clutch housing cylinder portion 21. An annular oil seal 102 is provided on the inside of the end of the extension cylinder portion 202 opposite to the clutch housing bottom 22. 【0027】 A housing seal member 101 is provided on the side of the clutch housing cylinder 21 opposite to the clutch housing bottom 22. The housing seal member 101 is formed in an annular shape, for example, from rubber. When the clutch device 10 is attached to the axle case 16, the clutch housing 20 is fixed to the axle case 16 by bolts (not shown) with the side of the clutch housing cylinder 21 opposite to the clutch housing bottom 22 in contact with the outer wall of the axle case 16. At this time, the housing seal member 101 is compressed between the clutch housing 20 and the outer wall of the axle case 16. This makes it possible to maintain an airtight or liquid-tight seal between the clutch housing 20 and the axle case 16. In this embodiment, when the clutch device 10 is attached to the axle case 16, a lubricant is contained inside the clutch housing 20. Here, the lubricant is, for example, lubricating oil. 【0028】 The actuator 30 is, for example, a solenoid. The actuator 30 includes an actuator housing 31, a movable core 32, an electromagnetic coil 33, a shaft 34, a fixed core 35, a spring 36, and the like. 【0029】 The actuator housing 31 includes an actuator housing cylindrical portion 311, an actuator housing plate portion 312, an actuator housing plate portion 313, an actuator housing hole portion 301, and the like. The actuator housing cylindrical portion 311, the actuator housing plate portion 312, and the actuator housing plate portion 313 are formed of, for example, a magnetic material. The actuator housing cylindrical portion 311 is formed in a substantially cylindrical shape. The actuator housing plate portion 312 is formed integrally with the actuator housing cylindrical portion 311 so as to close one end of the actuator housing cylindrical portion 311. The actuator housing plate portion 313 is provided so as to close the other end of the actuator housing cylindrical portion 311. The actuator housing hole portion 301 is formed in the actuator housing plate portion 312 so as to communicate the inside and outside of the actuator housing 31. 【0030】 The movable core 32 is formed in a substantially cylindrical shape from, for example, a magnetic material. The movable core 32 is housed in the actuator housing 31 and is provided to reciprocate axially inside the actuator housing 31. The electromagnetic coil 33 is, for example, a cylindrical coil and is housed in the actuator housing 31. The shaft 34 is formed in a rod shape from, for example, metal, with one end's outer circumferential wall joined to the inner circumferential wall of the movable core 32 and the other end positioned radially inward of the actuator housing hole 301. The fixed core 35 is formed in a substantially cylindrical shape from, for example, a magnetic material. The fixed core 35 is housed in the actuator housing 31 and is fixed to the actuator housing 31 such that one end face faces the end face of the movable core 32 and the other end face abuts against the actuator housing plate portion 312. The spring 36 is, for example, a coil spring and is provided between the movable core 32 and the fixed core 35 on the radially outer side of the shaft 34. The spring 36 biases the movable core 32 toward the actuator housing plate portion 313. 【0031】The actuator 30 is mounted to the clutch housing 20 with the end of the shaft 34 opposite to the movable core 32 positioned radially inward of the clutch housing hole 201, and the actuator housing plate 312 of the actuator housing 31 in contact with the clutch housing bottom 22 of the clutch housing 20. As a result, the end of the shaft 34 opposite to the movable core 32 is located inside the clutch housing 20. 【0032】 When the electromagnetic coil 33 is energized, magnetic flux flows through the fixed core 35, actuator housing 31, and movable core 32, creating a magnetic attraction between the fixed core 35 and the movable core 32. As a result, the movable core 32 moves toward the fixed core 35, resisting the biasing force of the spring 36. 【0033】 As shown in Figures 2 to 4, the fork 50 includes a fork body 51, an engaging portion 52, a pad 54, etc. The fork body 51 is formed in a substantially arc shape, for example, from metal (see Figure 4). The engaging portion 52 is formed integrally with the fork body 51 so as to connect to the center of the outer edge of the arc-shaped fork body 51. The engaging portion 52 has a hole 53. The hole 53 is formed to be recessed radially inward from the arc-shaped fork body 51 (see Figures 2 and 4). The pad 54 is provided at both ends of the arc-shaped fork body 51 so as to be rotatable relative to the fork body 51 (see Figure 4). 【0034】 The fork support portion 501 is formed in the shape of a cylindrical pin, for example, from metal (see Figure 4). The fork support portion 501 is provided on the clutch housing 20 so that its tip fits into a fork support hole portion 55 formed in the fork body 51. As shown in Figure 4, two fork support portions 501 are provided so that their tips face each other, sandwiching the fork body 51. The fork 50 is supported by the fork support portions 501 so that it can rotate relative to the clutch housing 20. 【0035】The first transmission section 110 has a cylindrical end on the side opposite to the differential shaft 11. The second transmission section 120 is cylindrical, with one end located radially inward of the first transmission section 110 and the other end located radially inward of the extension cylindrical section 202. One end of the second transmission section 120 is supported by a bearing 103 provided on the inner circumferential wall of the first transmission section 110, and the other end is supported by a bearing 104 provided on the inner circumferential wall of the extension cylindrical section 202 (see Figure 2). 【0036】 As shown in Figure 2, the clutch section 130 has a fixed clutch 60 and a movable clutch 70. The fixed clutch 60 is made of, for example, metal and has a fixed clutch plate 62 and fixed dog teeth 63. The fixed clutch plate 62 is formed in an annular plate shape so as to extend radially outward from the outer peripheral wall of the second transmission section 120. The fixed dog teeth 63 are formed so as to extend radially while protruding from one surface of the fixed clutch plate 62. 【0037】 The movable clutch 70 is made of, for example, metal and has a movable clutch cylinder portion 71, a movable clutch plate portion 72, movable dog teeth 73, and a clutch groove portion 74. The movable clutch cylinder portion 71 is formed in a cylindrical shape. The movable clutch plate portion 72 is formed in an annular plate shape so as to extend radially outward from the outer peripheral wall of one end of the movable clutch cylinder portion 71. The movable dog teeth 73 are formed so as to extend radially while protruding from one surface of the movable clutch plate portion 72. The clutch groove portion 74 is formed in an annular shape so as to be recessed radially inward from the outer peripheral wall of the movable clutch cylinder portion 71. 【0038】The movable clutch 70 is spline-coupled to the first transmission unit 110 by spline teeth formed on the inner circumferential wall of the movable clutch cylinder 71 engaging with spline teeth formed on the outer circumferential wall of the first transmission unit 110 (see Figure 4). Therefore, the movable clutch 70 cannot rotate relative to the first transmission unit 110, but can move relative to it in the axial direction. By moving the movable clutch 70 toward the fixed clutch 60, the movable dog teeth 73 can engage with the fixed dog teeth 63. The pad 54 of the fork 50 is located in the clutch groove 74. The pad 54 can rotate relative to the fork body 51 while located in the clutch groove 74. 【0039】 As shown in Figure 2, the connecting portion 80 has a connecting portion body 81 and an engaging portion 82. The connecting portion body 81 is formed in a rod shape, for example, from metal. One end of the connecting portion body 81 is formed in a cylindrical shape, and a screw groove is formed on the inner circumferential wall. The connecting portion body 81 has a spherical inner wall 811 and an opening 812. The spherical inner wall 811 is formed in a spherical shape at the other end of the connecting portion body 81. The opening 812 is formed to connect the space inside the spherical inner wall 811 with the space outside it. The opening 812 is formed in a direction perpendicular to the axis of the connecting portion body 81 with respect to the center of the spherical inner wall 811. 【0040】 The engaging portion 82 is formed in a rod shape, for example, from metal. The engaging portion 82 has a spherical portion 83, a flange portion 84, and a cylindrical portion 85. The spherical portion 83 is formed spherically at one end of the engaging portion 82. The cylindrical portion 85 is formed in a solid cylindrical shape at the other end of the engaging portion 82. The flange portion 84 is formed annularly so as to extend radially outward on the spherical portion 83 side relative to the cylindrical portion 85 of the engaging portion 82. 【0041】 The outer diameter of the spherical portion 83 is slightly smaller than the inner diameter of the spherical inner wall 811 of the connecting portion body 81. The engaging portion 82 is provided so that the spherical portion 83 fits into the spherical inner wall 811 of the connecting portion body 81. As a result, the engaging portion 82 is pivotable relative to the connecting portion body 81 with respect to the spherical portion 83. 【0042】The connecting portion 80 is integrally provided with the shaft 34 of the actuator 30 such that the thread groove on the inner circumferential wall of one end of the connecting portion body 81 engages with the thread formed on the end of the shaft 34 opposite to the movable core 32 of the actuator 30. As a result, the shaft 34 and the connecting portion body 81 of the connecting portion 80 are configured so that they cannot move relative to each other in the axial direction of the shaft 34. The cylindrical portion 85, which is the other end of the engaging portion 82 of the connecting portion 80, is fitted, i.e., engaged, with the hole 53 of the engaged portion 52 of the fork 50. The outer diameter of the cylindrical portion 85 of the engaging portion 82 is slightly smaller than the inner diameter of the hole 53. Therefore, the engaging portion 82 is axially movable relative to the engaged portion 52 while the outer circumferential wall of the cylindrical portion 85 slides against the inner circumferential wall of the hole 53 of the engaged portion 52. 【0043】 Figure 2 shows the state when the electromagnetic coil 33 of the actuator 30 is not energized. When the electromagnetic coil 33 is energized, the movable core 32 moves toward the fixed core 35 against the biasing force of the spring 36. As a result, the shaft 34 and the connecting part body 81 of the connecting part 80 move toward the opposite side from the actuator housing plate 313, i.e., toward the axle case 16. As a result, the driving force of the actuator 30 is transmitted from the shaft 34 through the connecting part 80 to the engaged part 52 of the fork 50, and the fork body 51 rotates around the fork support part 501. As a result, the pad 54 located in the clutch groove 74 moves toward the fixed clutch 60, and the movable dog teeth 73 engage with the fixed dog teeth 63. When the movable clutch 70 engages with the fixed clutch 60 by the engagement of the movable dog teeth 73 with the fixed dog teeth 63, torque transmission between the first transmission part 110 and the second transmission part 120 is permitted. 【0044】When the energization of the electromagnetic coil 33 is stopped with the movable dog tooth 73 meshed with the fixed dog tooth 63, the movable core 32 moves to the side opposite to the fixed core 35 by the biasing force of the spring 36. As a result, the shaft 34 and the connecting portion main body 81 of the connecting portion 80 move to the side of the actuator housing plate portion 313, that is, the side opposite to the axle case 16. As a result, the fork main body 51 rotates about the fork support portion 501. As a result, the pad 54 located in the clutch groove portion 74 moves to the side opposite to the fixed clutch 60, and the meshing of the movable dog tooth 73 and the fixed dog tooth 63 is released. When the meshing of the movable dog tooth 73 and the fixed dog tooth 63 is released and the engagement between the movable clutch 70 and the fixed clutch 60 is released, the torque transmission between the first transmission portion 110 and the second transmission portion 120 is blocked. Thus, the fork 50 swings about the fork support portion 501 by the driving force of the actuator 30, that is, by the operation of the actuator 30. 【0045】 As shown in FIG. 2, in a predetermined direction x1 which is a direction along the radial direction of the movable clutch 70, the length d1 of the gap S1 between the fork 50 and the movable clutch 70 is larger than the length d2 of the engagement portion E1 of the engaging portion 82 and the engaged portion 52. Here, the gap S1 is the gap formed between the fork main body 51 of the fork 50 and the clutch groove portion 74 of the movable clutch 70 in the predetermined direction x1 when the electromagnetic coil 33 is not energized. Further, the engagement portion E1 is the portion where the cylindrical portion 85 of the engaging portion 82 and the hole portion 53 of the engaged portion 52 are engaged (overlapped) in the predetermined direction x1 when the electromagnetic coil 33 is not energized. 【0046】 As shown in FIG. 5A, when the electromagnetic coil 33 is not energized, the cylindrical portion 85 of the engaging portion 82 does not contact the bottom portion 531 of the hole portion 53 of the engaged portion 52. Further, as shown in FIG. 5B, when the electromagnetic coil 33 is energized and the movable dog tooth 73 is meshed with the fixed dog tooth 63, the cylindrical portion 85 of the engaging portion 82 does not come out of the hole portion 53 of the engaged portion 52. That is, the engaging portion 82 is provided so as not to contact the bottom portion 531 of the hole portion 53 and not to come out of the hole portion 53 within the operable range of the shaft 34 of the actuator 30. 【0047】 Next, a method of assembling each component to the clutch housing 20 in the manufacturing method of the clutch device 10 will be described. 【0048】 (First step) The clutch housing 20 is arranged so that the bottom 22 of the clutch housing is on the lower side in the vertical direction (see FIG. 6A). 【0049】 (Second step) The actuator 30 with the connecting portion 80 attached to the shaft 34 is attached to the clutch housing 20. Specifically, the connecting portion 80 and the shaft 34 are inserted into the clutch housing hole 201, and the actuator 30 is fixed to the clutch housing 20 with bolts (not shown) in a state where the actuator housing plate portion 312 of the actuator housing 31 is abutted against the bottom 22 of the clutch housing (see FIG. 6B). 【0050】 (Third step) The second transmission portion 120 formed with the fixed clutch 60 is provided inside the clutch housing 20. Specifically, the second transmission portion 120 is provided so that the bearing 104 provided on the outer peripheral wall of the end portion of the second transmission portion 120 fits into the inner peripheral wall of the extended cylinder portion 202 (see FIG. 6C). 【0051】 (Fourth step) The clutch housing 20 is arranged so that the bottom 22 of the clutch housing is on the upper side in the vertical direction, and the oil seal 102 is provided inside the extended cylinder portion 202 (see FIG. 7A). 【0052】 (Fifth step) The first transmission portion 110 is inserted into the second transmission portion 120. Specifically, the first transmission portion 110 is provided so that the bearing 103 provided on the outer peripheral wall of the second transmission portion 120 fits into the inner peripheral wall of the first transmission portion 110 (see FIG. 7B). 【0053】(Sixth step) The movable clutch 70 is inserted into the first transmission unit 110 together with the fork 50, with the pad 54 positioned in the clutch groove 74. Specifically, the movable clutch 70 is inserted into the first transmission unit 110 together with the fork 50, with the pad 54 positioned in the clutch groove 74 and the inner edge of the arc-shaped fork body 51 in contact with the bottom wall of the clutch groove 74, thereby spline-connecting the movable clutch 70 and the first transmission unit 110. Here, the engaging portion 82 of the connecting portion 80 is located outside the hole 53 of the engaged portion 52 of the fork 50 and is not fitted into the hole 53. At this time, the engaging portion 82 and the hole 53 of the engaged portion 52 are aligned in a predetermined direction x1, where their respective axes are aligned in the direction along the radial direction of the movable clutch 70 (see Figures 8A and 8B). 【0054】 (Step 7) The fork 50 is moved in a direction away from the movable clutch 70 along a predetermined direction x1, that is, towards the engaging portion 82 of the connecting portion 80, and the engaging portion 82 is fitted into the hole 53 of the engaged portion 52. As a result, a gap S1 is formed between the fork 50 and the clutch groove portion 74 (see Figures 9A and 9B). 【0055】 (Step 8) The first transmission unit 110 is rotated to fully stroke the movable clutch 70 toward the fixed clutch 60, the movable dog teeth 73 engage with the fixed dog teeth 63, and the shaft 34 of the actuator 30 is fully stroked to align the fork support hole 55 with the position of the fork support 501 (see Figure 10A). 【0056】 (Step 9) Fit the fork support portion 501 into the fork support hole portion 55 (see Figure 10B). 【0057】In this embodiment, in a predetermined direction x1 which is along the radial direction of the movable clutch 70, the length d1 of the gap S1 between the fork 50 and the movable clutch 70 is greater than the length d2 of the engagement portion E1 between the engagement portion 82 and the engaged portion 52 (see Figure 2). Therefore, in the sixth step, the movable clutch 70 is inserted into the first transmission portion 110 together with the fork 50 with the inner edge of the arc-shaped fork body 51 in contact with the bottom wall of the clutch groove portion 74, and in the seventh step, the fork 50 is moved toward the engagement portion 82 of the connecting portion 80 along the predetermined direction x1, the engagement portion 82 is fitted into the hole portion 53 of the engaged portion 52, and the engagement portion 82 of the connecting portion 80 and the engaged portion 52 of the fork 50 can be engaged. In the ninth step, the fork support portion 501 is fitted into the fork support hole portion 55, thereby restricting the relative movement of the fork 50 in the predetermined direction x1 with respect to the clutch housing 20. 【0058】 As described above, in this embodiment, the second transmission unit 120 is provided so as to be rotatable relative to the first transmission unit 110. The fork 50 is driven by the driving force of the actuator 30. The fixed clutch 60 is fixed to the second transmission unit 120. The movable clutch 70 is provided so as to be axially movable relative to the first transmission unit 110 by the drive of the fork 50, and by engaging with the fixed clutch 60, it is possible to transmit torque between the first transmission unit 110 and the second transmission unit 120. 【0059】 The connecting portion 80 connects the actuator 30 and the fork 50, and is capable of transmitting the driving force of the actuator 30 to the fork 50. The clutch housing 20, which acts as the "housing," accommodates at least the fork 50 and the connecting portion 80. The fork support portion 501 is provided on the clutch housing 20 so as to be able to support the fork 50. The connecting portion 80 has an engaging portion 82. The fork 50 has an engaged portion 52 that engages with the engaging portion 82. 【0060】In a predetermined direction x1, the length d1 of the gap S1 between the fork 50 and the movable clutch 70 is greater than the length d2 of the engagement portion E1 between the engaging portion 82 and the engaged portion 52. Therefore, during the assembly of parts in the manufacturing process of the clutch device 10, an assembly method can be adopted in which, with the fork 50 and the movable clutch 70 in contact in a predetermined direction x1, the engaging portion 82 of the connecting portion 80 is positioned against the engaged portion 52 of the fork 50, and the engaging portion 82 is engaged with the engaged portion 52 by moving the fork 50 in a direction away from the movable clutch 70. As a result, bolts for fixing the joint as a connecting portion and the solenoid shaft as an actuator, which are required in conventional clutch devices, are not needed, and the space required for bolt assembly work is also not needed. 【0061】 Furthermore, in this embodiment, the fork 50 is rotatably supported by the fork support portion 501 so that it swings due to the driving force of the actuator 30. Therefore, the holding force against vibration can be reduced by the lever principle, and the holding mechanism can be made smaller. 【0062】 Furthermore, in this embodiment, the actuator 30 is a solenoid. Therefore, compared to the case where the actuator 30 is a motor and a rotational translation section is provided, the overall size can be reduced. 【0063】 Furthermore, in this embodiment, the actuator 30 has a shaft 34 that is driven to translate in the axial direction. The shaft 34 and the connecting portion 80 are provided so that they cannot move relative to each other. Therefore, the play between the shaft 34 and the connecting portion 80 can be made zero. 【0064】 Furthermore, in this embodiment, the engaged portion 52 has a hole 53 into which the engaging portion 82 can be fitted. Therefore, the shape of the fork 50 can be simplified and costs can be reduced. 【0065】 Furthermore, in this embodiment, the engaging portion 82 is provided so as not to contact the bottom portion 531 of the hole 53 within its operable range, and not to come out of the hole 53. Therefore, it is possible to create a configuration that is easy to manufacture while maintaining the engaged state between the engaging portion 82 and the engaged portion 52 within its operable range. 【0066】 Furthermore, in this embodiment, the movable clutch 70 has an annular clutch groove 74 that is recessed radially inward from the outer peripheral wall. The fork 50 has a fork body 51 and a pad 54 that is rotatable relative to the fork body 51 while positioned in the clutch groove 74. Therefore, the contact surface area between the pad 54 and the clutch groove 74 can always be kept large and constant, thereby increasing strength. 【0067】 (Second Embodiment) Figures 11 to 14 show a part of the clutch device according to the second embodiment. The second embodiment differs from the first embodiment in the configuration of the connecting portion 80 and the engaged portion 52 of the fork 50. 【0068】 In this embodiment, the connecting portion 80 has an engaging portion 82. The engaging portion 82 is formed of, for example, resin, and has an engaging portion base 86 and an engaging piece 87. The engaging portion base 86 is formed in a cylindrical shape. The engaging piece 87 is formed in a plate shape so as to extend radially outward from the outer peripheral wall of one end and the other end of the engaging portion base 86. In other words, two engaging pieces 87 are provided at a predetermined distance apart in the axial direction of the engaging portion base 86. The engaging portion 82 of the connecting portion 80 is fixed to the shaft 34 such that the inner peripheral wall of the engaging portion base 86 fits into the outer peripheral wall of the end of the shaft 34 of the actuator 30. In other words, the shaft 34 and the connecting portion 80 are provided so as to be immovable relative to each other. 【0069】 As shown in Figure 11, the fork 50 has a fork body extension 58. The fork body extension 58 is formed integrally with the fork body 51 so as to extend in a rectangular plate shape from the center of the outer edge of the arc-shaped fork body 51. The engaged portion 52 has an engaged portion base 56 and an engaged piece 57. The engaged portion base 56 is formed on the end face of the fork body extension 58 opposite to the fork body 51 so as to extend from both sides in the short direction of the fork body extension 58 toward the opposite side of the fork body 51. In other words, two engaged portion bases 56 are formed on the fork body extension 58. The engaged piece 57 is formed to protrude in a plate shape from the mutually opposing surfaces of the two engaged portion bases 56 (see Figures 11 and 12). 【0070】 The fork 50 is provided such that the two engaged pieces 57 of the engaged portion 52 are positioned between the two engaged pieces 87 of the engaged portion 82, with the engaged portion base 86 sandwiched in between (see Figure 12). Thus, the engaged portion 82 has two engaged pieces 87 provided at a predetermined distance apart in the axial direction of the actuator 30. The engaged portion 52 has engaged pieces 57 that engage with the engaged pieces 87 between the two engaged pieces 87. 【0071】 As shown in Figure 11, in a predetermined direction x1 which is along the radial direction of the movable clutch 70, the length d1 of the gap S1 between the fork 50 and the movable clutch 70 is greater than the length d2 of the engagement portion E1 between the engaging portion 82 and the engaged portion 52. Here, the gap S1 is the gap formed between the fork body 51 of the fork 50 and the clutch groove portion 74 of the movable clutch 70 in the predetermined direction x1 when the electromagnetic coil 33 is not energized. The engagement portion E1 is the portion (shown as a grid in Figure 11) in the predetermined direction x1 where the engaging piece 87 of the engaging portion 82 and the engaged piece 57 of the engaged portion 52 are engaged (overlapping) when the electromagnetic coil 33 is not energized. 【0072】 As described above, in this embodiment, in a predetermined direction x1, the length d1 of the gap S1 between the fork 50 and the movable clutch 70 is greater than the length d2 of the engagement portion E1 between the engaging portion 82 and the engaged portion 52. Therefore, similar to the first embodiment, when assembling the parts in the manufacturing process of the clutch device 10, an assembly method can be adopted in which, with the fork 50 and the movable clutch 70 in contact in a predetermined direction x1, the engaging portion 82 of the connecting portion 80 is positioned against the engaged portion 52 of the fork 50, and the engaging portion 82 is engaged with the engaged portion 52 by moving the fork 50 in a direction away from the movable clutch 70. 【0073】Furthermore, in this embodiment, the engaging portion 82 has two engaging pieces 87 that are provided at a predetermined distance apart in the axial direction of the actuator 30. The engaged portion 52 has an engaged piece 57 that engages with the engaging pieces 87 between the two engaging pieces 87. Therefore, assembly of the engaging portion 82 and the engaged portion 52 is easy, and the margin for play can be increased. 【0074】 (Third Embodiment) Figure 15A shows a part of the clutch device according to the third embodiment. The configuration of the engaging portion 82 and the engaged portion 52 in the third embodiment differs from that of the second embodiment. 【0075】 In this embodiment, the engaging piece 87 is formed to extend radially outward from the outer peripheral wall of the engaging portion base 86. 【0076】 Two engaged pieces 57 are formed on one engaged portion base 56, i.e., four in total on one fork 50, with an engaging piece 87 sandwiched between them. Thus, the engaged portion 52 has two engaged pieces 57 provided at a predetermined distance apart in the axial direction of the actuator 30. The engaging portion 82 has an engaging piece 87 that engages with the engaged pieces 57 between the two engaged pieces 57. 【0077】 In this embodiment as well, similar to the second embodiment, the assembly of the engaging portion 82 and the engaged portion 52 is easy, and the margin for play can be greatly increased. 【0078】 (Fourth Embodiment) Figure 15B shows a part of the clutch device according to the fourth embodiment. The fourth embodiment differs from the third embodiment in the configuration of the engaged portion 52. 【0079】 In this embodiment, the engaged portion 52 does not have an engaged portion base 56. That is, the four engaged pieces 57 are formed to protrude from the end face of the fork body extension portion 58 opposite to the fork body 51. 【0080】 In this embodiment as well, similar to the third embodiment, the assembly of the engaging portion 82 and the engaged portion 52 is easy, and the margin for play can be greatly increased. 【0081】(Fifth Embodiment) Figure 16 shows a part of the clutch device according to the fifth embodiment. The fifth embodiment differs from the first embodiment in the configuration of the connecting portion 80, etc. 【0082】 In this embodiment, the connecting portion 80 is integrally formed with the connecting portion body 81 and the engaging portion 82. Therefore, the connecting portion body 81 and the engaging portion 82 are immovable relative to each other. The fork support hole 55 is formed to penetrate the fork body 51 in a direction along the axial direction of the movable clutch 70. The fork support portion 501 is formed in a cylindrical shape and is provided so as to pass through the fork support hole 55 and have its end fixed to the inner wall of the clutch housing 20. 【0083】 In this embodiment, when the electromagnetic coil 33 is not energized, the movable dog teeth 73 and the fixed dog teeth 63 are engaged. When the electromagnetic coil 33 is energized, the shaft 34 and the connecting portion 80 move toward the axle case 16. As a result, the driving force of the actuator 30 is transmitted from the shaft 34 through the connecting portion 80 to the engaged portion 52 of the fork 50, and the fork 50 moves (translates) toward the axle case 16 while being guided by the fork support portion 501. As a result, the pad 54 located in the clutch groove portion 74 moves toward the opposite side from the fixed clutch 60, and the engagement between the movable dog teeth 73 and the fixed dog teeth 63 is released. When the engagement between the movable clutch 70 and the fixed clutch 60 is released due to the release of the engagement between the movable dog teeth 73 and the fixed dog teeth 63, the transmission of torque between the first transmission portion 110 and the second transmission portion 120 is interrupted. 【0084】When the engagement between the movable clutch 70 and the fixed clutch 60 is released (see Figure 16), and the power supply to the electromagnetic coil 33 is stopped, the shaft 34 and the connecting portion 80 move to the opposite side from the axle case 16. As a result, the fork 50 moves (translates) to the opposite side from the axle case 16, guided by the fork support portion 501. This causes the pad 54 located in the clutch groove portion 74 to move toward the fixed clutch 60, and the movable dog teeth 73 engage with the fixed dog teeth 63. When the movable clutch 70 engages with the fixed clutch 60 due to the engagement of the movable dog teeth 73 with the fixed dog teeth 63, torque transmission between the first transmission portion 110 and the second transmission portion 120 is permitted. In this way, the fork 50 translates relative to the clutch housing 20 by the driving force of the actuator 30, that is, by the operation of the actuator 30. 【0085】 Next, we will describe the method of assembling each component into the clutch housing 20, which is part of the manufacturing method of the clutch device 10 of this embodiment. 【0086】 In this embodiment, steps (1) to (7) are the same as in the first embodiment, so their explanation will be omitted. 【0087】 (Step 8) The first transmission unit 110 is rotated to fully extend the movable clutch 70 toward the fixed clutch 60, and the movable dog teeth 73 engage with the fixed dog teeth 63. 【0088】 (Step 9) Insert the fork support portion 501 through the fork support hole portion 55 and fix the end of the fork support portion 501 to the inner wall of the clutch housing 20. 【0089】In this embodiment, in a predetermined direction x1 which is along the radial direction of the movable clutch 70, the length d1 of the gap S1 between the fork 50 and the movable clutch 70 is greater than the length d2 of the engagement portion E1 between the engagement portion 82 and the engaged portion 52 (see Figure 16). Therefore, in the sixth step, the movable clutch 70 is inserted into the first transmission portion 110 together with the fork 50 with the inner edge of the arc-shaped fork body 51 in contact with the bottom wall of the clutch groove portion 74, and in the seventh step, the fork 50 is moved toward the engagement portion 82 of the connecting portion 80 along the predetermined direction x1, the engagement portion 82 is fitted into the hole portion 53 of the engaged portion 52, and the engagement portion 82 of the connecting portion 80 and the engaged portion 52 of the fork 50 can be engaged. In the ninth step, the relative movement of the fork 50 in the predetermined direction x1 with respect to the clutch housing 20 can be restricted by inserting the fork support portion 501 into the fork support hole portion 55. 【0090】 As described above, in this embodiment, in a predetermined direction x1, the length d1 of the gap S1 between the fork 50 and the movable clutch 70 is greater than the length d2 of the engagement portion E1 between the engaging portion 82 and the engaged portion 52. Therefore, similar to the first embodiment, when assembling the parts in the manufacturing process of the clutch device 10, an assembly method can be adopted in which, with the fork 50 and the movable clutch 70 in contact in a predetermined direction x1, the engaging portion 82 of the connecting portion 80 is positioned against the engaged portion 52 of the fork 50, and the engaging portion 82 is engaged with the engaged portion 52 by moving the fork 50 in a direction away from the movable clutch 70. 【0091】 Furthermore, in this embodiment, the fork 50 is supported by the fork support portion 501 so as to translate relative to the clutch housing 20 by the driving force of the actuator 30. Therefore, the engagement length between the fork 50 and the movable clutch 70 can be increased, thereby improving reliability. 【0092】 (Sixth Embodiment) Figure 17 shows a part of the clutch device according to the sixth embodiment. The sixth embodiment differs from the fifth embodiment in the configuration of the actuator 30, the connecting part 80, etc. 【0093】In this embodiment, the actuator 30 is a motor. The actuator housing 31 houses a stator, coil, rotor, etc. (not shown). One end of the shaft 34 is connected to the rotor, and the other end is located inside the clutch housing 20. A helical ball groove 340 is formed on the outer circumferential wall of the other end of the shaft 34. 【0094】 In this embodiment, the connecting portion body 81 is formed in a cylindrical shape. The engaging portion 82 is provided to connect to the outer peripheral wall of the connecting portion body 81. A spiral ball groove 810 is formed on the inner peripheral wall of the connecting portion body 81. The connecting portion body 81 is inserted through the other end of the shaft 34. Multiple balls 88 are provided between the ball groove 340 of the shaft 34 and the ball groove 810 of the connecting portion body 81. 【0095】 With the above configuration, when current is supplied to the coil of the actuator 30, the shaft 34 rotates. As a result, the ball 88 rolls between the ball groove 340 of the shaft 34 and the ball groove 810 of the connecting body 81, causing the connecting body 81 to move relative to the shaft 34 in the axial direction. This causes the fork 50 to translate relative to the clutch housing 20. In this way, similar to the fifth embodiment, the fork 50 translates relative to the clutch housing 20 due to the driving force of the actuator 30, that is, the operation of the actuator 30. Here, the shaft 34 as the "rotating part", the connecting body 81 as the "translating part", and the ball 88 as the "rolling element" constitute the "rotating-translating part". 【0096】 As explained above, in this embodiment, the actuator 30 is a motor. Therefore, it is advantageous from the standpoint of functional safety and enables high output. 【0097】 (Other Embodiments) In other embodiments, the fork pads do not need to be rotatable relative to the fork body. 【0098】Furthermore, in the above-described embodiment, an example was shown in which the clutch device 10 is provided between the differential shaft 11 and the wheel shaft 12 to control the transmission of torque between the differential shaft 11 and the wheel shaft 12. In contrast, in another embodiment, for example, the first gear shaft 3 may be divided into two between the motor generator 2 and the first small-diameter gear 5, with one part connected to the first transmission unit 110 and the other part connected to the second transmission unit 120, and the clutch device 10 may be applied in this manner. In this case, the clutch device 10 can control the transmission of torque between the motor generator 2 and the first small-diameter gear 5. 【0099】 In another embodiment, for example, the second gear shaft 4 may be divided into two parts between the first large-diameter gear 6 and the second small-diameter gear 7, with one part connected to the first transmission unit 110 and the other part connected to the second transmission unit 120, and the clutch device 10 may be applied in this manner. In this case, the clutch device 10 can control the transmission of torque between the first large-diameter gear 6 and the second small-diameter gear 7. 【0100】 Furthermore, in the above-described embodiment, an example was shown in which the clutch device is used to control the transmission of torque between the motor generator and the rear wheels of the vehicle. In contrast, in another embodiment, the clutch device may be used to control the transmission of torque between the motor generator and the front wheels of the vehicle. 【0101】 Furthermore, this disclosure can be applied not only to electric vehicles, but also to vehicles that run on driving torque from an internal combustion engine, hybrid vehicles, and the like. 【0102】(Disclosure of Technical Ideas) This specification discloses several technical ideas as described in the following paragraphs. Some paragraphs may be written in a multiple dependent form, where subsequent paragraphs optionally refer to preceding paragraphs. Furthermore, some paragraphs may be written in a multiple dependent form, where they refer to other multiple dependent forms. These paragraphs written in multiple dependent forms define several technical ideas. (Technical Concept 1) A first transmission unit (110), a second transmission unit (120) provided to be rotatable relative to the first transmission unit, an actuator (30), a fork (50) driven by the driving force of the actuator, a fixed clutch (60) fixed to the second transmission unit, a movable clutch (70) provided to be axially movable relative to the first transmission unit by the drive of the fork, and which, by engaging with the fixed clutch, allows the transmission of torque between the first transmission unit and the second transmission unit, a connecting unit (80) that connects the actuator and the fork and transmits the driving force of the actuator to the fork, a housing (20) that houses at least the fork and the connecting unit, and a fork support unit (501) provided in the housing to support the fork, wherein the connecting unit has an engaging unit (82), and the fork has an engaged unit (52) that engages with the engaging unit. A clutch device in which, in a predetermined direction (x1), the length (d1) of the gap (S1) between the fork and the movable clutch is greater than the length (d2) of the engagement portion (E1) between the engaging portion and the engaged portion. (Technical Concept 2) The clutch device according to Technical Concept 1, wherein the fork is rotatably supported by the fork support portion so as to swing by the driving force of the actuator. (Technical Concept 3) The clutch device according to Technical Concept 1, wherein the fork is supported by the fork support portion so as to translate relative to the housing by the driving force of the actuator.(Technical Idea 4) The clutch device according to any one of Technical Ideas 1 to 3, wherein the actuator is a solenoid. (Technical Idea 5) The clutch device according to Technical Idea 4, wherein the actuator has a shaft (34) that is driven to translate in the axial direction, and the shaft and the connecting part are provided so that they cannot move relative to each other. (Technical Idea 6) The clutch device according to any one of Technical Ideas 1 to 3, wherein the actuator is a motor. (Technical Idea 7) The clutch device according to any one of Technical Ideas 1 to 6, wherein the engaged part has a hole (53) into which the engaging part can engage by fitting. (Technical Idea 8) The clutch device according to Technical Idea 7, wherein the engaging part is provided so as not to contact the bottom (531) of the hole and not to come out of the hole within the operable range. (Technical Idea 9) The clutch device according to any one of Technical Ideas 1 to 8, wherein the movable clutch has an annular clutch groove (74) recessed radially inward from the outer peripheral wall, and the fork has a fork body (51) and a pad (54) provided so as to be rotatable relative to the fork body when positioned in the clutch groove. (Technical Idea 10) The clutch device according to any one of Technical Ideas 1 to 9, wherein the engaging portion has two engaging pieces (87) provided at a predetermined distance apart in the axial direction of the actuator, and the engaged portion has an engaged piece (57) that engages with the engaging piece between the two engaging pieces. (Technical Idea 11) The clutch device according to any one of Technical Ideas 1 to 9, wherein the engaged portion has two engaged pieces (57) provided at a predetermined distance apart in the axial direction of the actuator, and the engaging portion has an engaging piece (87) that engages with the engaged piece between the two engaged pieces. 【0103】 Thus, this disclosure is not limited to the embodiments described above, and can be implemented in various forms without departing from its essence. 【0104】This disclosure is described based on embodiments. However, this disclosure is not limited to such embodiments and structures. This disclosure also includes various modifications and variations within the scope of equivalents. Furthermore, various combinations and forms, as well as other combinations and forms that include only one, more, or fewer elements, fall within the scope and idea of ​​this disclosure.

Claims

First transmission unit (110), A second transmission unit (120) is provided so as to be rotatable relative to the first transmission unit, Actuator (30) and A fork (50) driven by the driving force of the actuator, A fixed clutch (60) fixed to the second transmission unit, A movable clutch (70) is provided so as to be axially movable relative to the first transmission unit by the drive of the fork, and which, when engaged with the fixed clutch, allows the transmission of torque between the first transmission unit and the second transmission unit. A connecting portion (80) that connects the actuator and the fork and is capable of transmitting the driving force of the actuator to the fork, A housing (20) that accommodates at least the fork and the connecting portion, The housing is provided with a fork support portion (501) capable of supporting the fork, The connecting portion has an engaging portion (82), The fork has an engaged portion (52) that engages with the engaging portion, A clutch device in which, in a predetermined direction (x1), the length (d1) of the gap (S1) between the fork and the movable clutch is greater than the length (d2) of the engagement portion (E1) between the engaging portion and the engaged portion. 　 The clutch device according to claim 1, wherein the fork is rotatably supported by the fork support so as to swing by the driving force of the actuator. 　 The clutch device according to claim 1, wherein the fork is supported by the fork support so as to translate relative to the housing by the driving force of the actuator. 　 The clutch device according to any one of claims 1 to 3, wherein the actuator is a solenoid. 　 The actuator has a shaft (34) that is driven to translate in the axial direction. The clutch device according to claim 4, wherein the shaft and the connecting portion are provided so as to be immovable relative to each other. 　 The clutch device according to any one of claims 1 to 3, wherein the actuator is a motor. 　 The clutch device according to any one of claims 1 to 3, wherein the engaged portion has a hole (53) into which the engaging portion can be fitted. 　 The clutch device according to claim 7, wherein the engaging portion is provided so as not to come into contact with the bottom (531) of the hole within the operating range and not to come out of the hole. 　 The movable clutch has an annular clutch groove (74) recessed radially inward from the outer peripheral wall, The clutch device according to any one of claims 1 to 3, wherein the fork comprises a fork body (51) and a pad (54) provided so as to be rotatable relative to the fork body while positioned in the clutch groove. 　 The engagement portion has two engagement pieces (87) provided at a predetermined distance apart in the axial direction of the actuator. The clutch device according to any one of claims 1 to 3, wherein the engaged portion has an engaged piece (57) that engages with the engaging piece between the two engaging pieces. 　 The engaged portion has two engaged pieces (57) provided at a predetermined distance apart in the axial direction of the actuator. The clutch device according to any one of claims 1 to 3, wherein the engaging portion has an engaging piece (87) that engages with the engaged pieces between the two engaged pieces.

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