Reverse input cut clutch

Abstract

Provided are: a pressed member having a pressed surface (24) on an inner peripheral surface; an input member having an input-side engaging portion (6) disposed radially inward of the pressed surface (24) and coaxially with the pressed surface (24); an output member having an output-side engaging portion (13) disposed radially inward of the input-side engaging portion (6) and coaxially with the pressed surface (24); an engaging member (5) having a pressing surface (39) facing the pressed surface (24), an input-side engaged portion (47) capable of engaging with the input-side engaging portion (6), and an output-side engaged portion (40) capable of engaging with the output-side engaging portion (13), and being capable of moving in a first direction, i.e., a direction of proximity and distance with respect to the pressed surface (24), and being disposed radially inward of the pressed surface (24); and an elastic member (50) elastically sandwiched between the output-side engaging portion (13) and the engaging member (5) in the first direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a reverse input cut clutch having a function of completely cutting off a rotational torque inputted reversely to an output member without transmitting it to an input member, or transmitting only a part of it to the input member, and cutting off the remaining part, with respect to a rotational torque inputted to the input member to the output member. BACKGROUND

[0002] Figures 20-22 An example of a conventional configuration of a reverse input cut clutch described in International Publication No. 2019 / 026794 is shown.

[0003] The reverse input cut clutch 101 is provided with an input member 102, an output member 103, a pressed member 104, and a pair of engaging members 105.

[0004] The input member 102 is connected to an input side mechanism such as an electric motor, and a rotational torque is inputted thereto. The input member 102 has an input shaft portion 106 and a pair of input side engaging portions 107. The base end portion of the input shaft portion 106 is connected to the output portion of the above-mentioned input side mechanism. The pair of input side engaging portions 107 is constituted by protrusions extending in the axial direction from two positions on the diametrically opposite side of the front end surface of the input shaft portion 106.

[0005] The output member 103 is connected to an output side mechanism such as a reduction mechanism, and outputs a rotational torque. The output member 103 is coaxially arranged with the input member 102, and has an output shaft portion 108 and an output side engaging portion 109. The base end portion of the output shaft portion 108 is connected to the input portion of the above-mentioned output side mechanism. The output side engaging portion 109 is a substantially elliptic cylindrical shape, and extends in the axial direction from the central portion of the front end surface of the output shaft portion 108. The output side engaging portion 109 is arranged in the portion between the pair of input side engaging portions 107.

[0006] The pressed member 104 is a circular ring shape, is fixed to other members such as a housing, which are not shown, and its rotation is restricted. The pressed member 104 is coaxially arranged with the input member 102 and the output member 103, and is arranged on the radially outer side of the pair of input side engaging portions 107 and the output side engaging portion 109. The pressed member 104 has a pressed surface 110 constituted by a cylindrical concave surface on its inner peripheral surface.

[0007] Each of the pair of engaging members 105 is a substantially semicircular plate, and is disposed on the radially inner side of the pressed member 104. The engaging member 105 has a pressed surface 111 composed of a part-cylindrical convex surface on the radially outer side surface thereof opposite the pressed surface 110, and has a bottom surface 112 composed of a flat surface on the radially inner side surface thereof except for a portion where the output-side engaged portion 114 described later is provided. The radius of curvature of the pressed surface 111 is equal to or smaller than the radius of curvature of the pressed surface 110. Further, with respect to the engaging member 105, a direction indicated by an arrow a in FIG. 1, which is perpendicular to the bottom surface 112, is referred to as a radial direction, and a direction indicated by an arrow β in FIG. 1, which is parallel to the bottom surface 112, is referred to as a width direction. Figure 21 Figure 21

[0008] The inner diameter dimension of the pressed member 104 and the radial dimension of the engaging member 105 are limited so that a gap exists at least one of between the pressed surface 110 and the pressed surface 111 and between the respective bottom surfaces 112 in a state where the pair of engaging members 105 is disposed on the radially inner side of the pressed member 104.

[0009] The engaging member 105 has an input-side engaged portion 113 and an output-side engaged portion 114. The input-side engaged portion 113 is composed of a hole that penetrates a radially intermediate portion of the engaging member 105 in the axial direction, and has a size that can be loosely inserted into the input-side engaging portion 107. Therefore, the input-side engaging portion 107 can be displaced in the rotational direction of the input member 102 with respect to the engaging member 105, and the engaging member 105 can be displaced in the radial direction of the engaging member 105 with respect to the input-side engaging portion 107. The output-side engaged portion 114 is composed of a substantially rectangular recess that is recessed from a width direction central portion of the bottom surface 112 of the engaging member 105 toward the radially outer side, and has a size that can accommodate the front half of the short axis direction of the output-side engaging portion 109.

[0010] In an assembled state of the reverse input cut clutch 101, the pair of input-side engaging portions 107 of the input member 102 is inserted from one axial side into the input-side engaged portions 113 of the pair of engaging members 105, and the output-side engaging portion 109 of the output member 103 is inserted from the other axial side between the pair of output-side engaged portions 114. That is, the pair of engaging members 105 is disposed so as to sandwich the output-side engaging portion 109 from the radially outer side.

[0011] When a rotational torque is input to the input member 102 from the input-side mechanism, as shown in FIG. 2, the input-side engaging portion 107 of the input member 102 is displaced in the rotational direction of the input member 102 with respect to the engaging member 105, and the engaging member 105 is displaced in the radial direction of the engaging member 105 with respect to the input-side engaging portion 107. Figure 21 ​​As shown, the input-side engaging portion 107 rotates toward the rotation direction of the input member 102 inside the input-side engaged portion 113. Then, the radially inner side surface of the input-side engaging portion 107 presses the inner surface of the input-side engaged portion 113 toward the radially inner side, and each of the pair of engaging members 105 moves in a direction away from the pressed surface 110. Thus, the pair of output-side engaged portions 114 sandwich the output-side engaging portion 109 of the output member 103 from both radially sides, and the output-side engaging portion 109 and the pair of output-side engaged portions 114 are engaged without shaking. As a result, the rotation torque input to the input member 102 is transmitted to the output member 103 via the pair of engaging members 105, and is output from the output member 103.

[0012] On the other hand, when a reverse rotation torque is input from the output-side mechanism to the output member 103, as shown in FIG. 4, the output-side engaging portion 109 rotates toward the rotation direction of the output member 103 inside the pair of output-side engaged portions 114. Then, the corner portion of the output-side engaging portion 109 presses the bottom surface of the output-side engaged portion 114 toward the radially outer side, and each of the pair of engaging members 105 moves in a direction approaching the pressed surface 110. Thus, the pressed surface 111 of the pair of engaging members 105 is pressed against the pressed surface 110 of the pressed member 104. As a result, the reverse rotation torque input to the output member 103 is transmitted to the pressed member 104 fixed to other members not shown, and is completely cut off from being transmitted to the input member 102, or only a part of the reverse rotation torque input to the output member 103 is transmitted to the input member 102, and the remaining part is cut off. Figure 22

[0013] In order to completely cut off the reverse rotation torque input to the output member 103 from being transmitted to the input member 102, and to lock the output member 103, the pair of engaging members 105 is sandwiched between the output-side engaging portion 109 and the pressed member 104 in a manner that the pressed surface 111 does not slide against the pressed surface 110. In order to transmit only a part of the reverse rotation torque input to the output member 103 to the input member 102, and to semi-lock the output member 103, the pair of engaging members 105 is sandwiched between the output-side engaging portion 109 and the pressed member 104 in a manner that the pressed surface 111 slides against the pressed surface 110.

[0014] Prior Art Documents

[0015] Patent Documents

[0016] Patent Document 1: International Publication No. 2019 / 026794 SUMMARY

[0017] PROBLEMS TO BE SOLVED BY THE INVENTION ​

[0018] In assembling the reverse input cut clutch 101, the output-side engaging portion 109 of the output member 103 is inserted between the output-side engaged portions 114 of the pair of engaging members 105. From the viewpoint of ensuring the workability of the assembly work, it is desirable to limit the dimensions of the respective members in such a manner that the output-side engaging portion 109 can be inserted between the output-side engaged portions 114 with some degree of looseness. In this case, in the neutral state in which neither the input member 102 nor the output member 103 is inputted with a rotational torque, a gap is formed between the output-side engaging portion 109 and the output-side engaged portions 114. Therefore, due to the gap between the output-side engaging portion 109 and the output-side engaged portions 114, it is not possible to avoid the occurrence of the wobble of the output member 103.

[0019] As for the wobble of the output member 103, depending on the use of the reverse input cut clutch 101, it can not become a problem. However, in the case where the output member 103 is linked to the threaded shaft of a ball screw device, and the input member 102 is linked to an electric motor, and the reverse input cut clutch 101 is applied to a use such as the position adjustment of a worktable fixed to a nut, the steering angle adjustment of a tire, or the like, if a rotational torque is inputted to the output member 103 in the reverse direction from the worktable or the tire via the nut, due to the wobble of the output member 103, it is possible that the position of the worktable or the steering angle of the tire deviates from the adjusted position, or a problem such as the generation of a noise occurs.

[0020] An object of the present application is to provide a reverse input cut clutch capable of suppressing the wobble of the output member.

[0021] Solution to the problem

[0022] The reverse input cut clutch of one aspect of the present application is provided with a pressed member, an input member, an output member, an engaging member, and an elastic member.

[0023] The pressed member has a pressed surface on an inner peripheral surface.

[0024] The input member has an input-side engaging portion disposed radially inward of the pressed surface, and is disposed coaxially with the pressed surface.

[0025] The output member has an output-side engaging portion disposed radially inward of the pressed surface, radially inward of the input-side engaging portion, and is disposed coaxially with the pressed surface.

[0026] The engaging member has a pressing surface opposed to the pressed surface, an input-side engaged portion capable of engaging with the input-side engaging portion, and an output-side engaged portion capable of engaging with the output-side engaging portion, and is disposed radially inward of the pressed surface so as to be movable in a direction of approach and departure from the pressed surface, i.e., a first direction.

[0027] In the above-described engaging member, when a rotational torque is input to the input member, the rotational torque input to the input member is transmitted to the output member by the engagement of the input-side engaging portion with the input-side engaged portion, displacement of the output-side engaged portion and the output-side engaging portion away from the pressed surface, and engagement of the output-side engaging portion with the output-side engaged portion. When a reverse rotational torque is input to the output member, the pressed surface is pressed against the pressed surface by the engagement of the output-side engaging portion with the output-side engaged portion, and the pressed surface is frictionally engaged with the pressed surface.

[0028] The elastic member presses the output-side engaging portion toward the side away from the pressed surface in the first direction, and presses the engaging member toward the side close to the pressed surface in the first direction, by being elastically sandwiched between the output-side engaging portion and the engaging member.

[0029] The elastic member has an elastic pressing portion disposed at a position axially offset from the output-side engaged portion with respect to the output-side engaging portion in the axial direction of the pressed surface, at a position overlapping the output-side engaging portion in the first direction, and elastically presses the elastic pressing portion against the output-side engaging portion.

[0030] In one aspect of the present application, the elastic pressing portion is disposed at a position axially offset to both sides of the output-side engaged portion with respect to the output-side engaging portion in the axial direction of the pressed surface.

[0031] In one aspect of the present application, the elastic member is not fixed to either of the output member and the engaging member, and is elastically sandwiched between the output-side engaging portion and the engaging member.

[0032] In one aspect of the present application, the elastic member is configured to restrict displacement in a direction orthogonal to the first direction based on engagement with the engaging member.

[0033] In one aspect of the present application, the elastic member is constituted by a plate spring.

[0034] In one aspect of the present application, the plate spring constituting the elastic member has a first through-hole passing through in the first direction at a position integrated with the output-side engaged portion.

[0035] The elastic pressing portion is disposed on both sides of the first through-hole in the axial direction of the pressed surface.

[0036] In one aspect of the present application, the engaging member has a first protrusion inserted into the first through-hole, and displacement of the elastic member in the axial direction of the pressed surface and / or displacement of the elastic member in a second direction orthogonal to both the first direction and the axial direction of the pressed surface is restricted based on engagement of the first through-hole and the first protrusion inserted into the first through-hole.

[0037] In one aspect of the present application, the plate spring constituting the elastic member has a second through-hole passing through in the first direction at a position where the first through-hole is separated in the second direction orthogonal to both the first direction and the axial direction of the pressed surface, the engaging member has a second protrusion inserted into the second through-hole, and displacement of the elastic member in the axial direction of the pressed surface and / or displacement of the elastic member in the second direction is restricted based on engagement of the second through-hole and the second protrusion inserted into the second through-hole.

[0038] In one aspect of the present application, the engaging member has only one main plate having the pressed surface and the output-side engaging portion.

[0039] In one aspect of the present application, the engaging member has the main plate and a link member disposed adjacent to the main plate in the axial direction of the main plate.

[0040] The main plate has a swing support portion located on the side closer to the pressed surface than the input-side engaging portion in the first direction.

[0041] The link member has the input-side engaging portion and a swing-supported portion swingably supported by the swing support portion.

[0042] In the engaging member, when a rotational torque is input to the input member, the swing-supported portion is pulled via the link member by the input-side engaging portion, thereby moving away from the pressed surface, the output-side engaging portion engages with the output-side engaging portion, and the rotational torque input to the input member is transmitted to the output member.

[0043] In one aspect of the present application, the link member is composed of a pair of link members arranged to sandwich the main plate from both axial sides.

[0044] In one aspect of the present application, the swing-supported portion is composed of a plate-side through-hole provided in the main plate, and the swing-supported portion is composed of a link-side through-hole provided in the link member.

[0045] The engaging member has a swing support shaft inserted into the plate-side through-hole and the link-side through-hole.

[0046] In one aspect of the present application, the engaging member is composed of a pair of engaging members arranged to sandwich the output-side engaging portion from both radial sides.

[0047] The input-side engaging portion of the input member is composed of a pair of input-side engaging portions.

[0048] In one aspect of the present application, a reinforcing member is provided, which is erected between the front end portions of the input-side engaging portions constituting the pair of input-side engaging portions.

[0049] Effects of the Invention

[0050] According to the present application, there is provided a reverse input cut-off clutch capable of suppressing the wobble of an output member. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is a sectional view of a reverse input cut-off clutch of a first example of an embodiment of the present application.

[0052] Figure 2 is a view of the reverse input cut-off clutch of the first example as viewed from the right of Figure 1 .

[0053] Figure 3 is an exploded perspective view of the reverse input cut-off clutch of the first example.

[0054] Figure 4 is a view of the reverse input cut-off clutch of the first example as viewed from the left of Figure 1 , with the output-side engaging portion cut along the A-A line, and in a neutral state in which no rotational torque is input to either the input member or the output member. Figure 1

[0055] Figure 5 is the same view as Figure 4 , shown in a state in which a rotational torque is input to the input member.

[0056] Figure 6 is the same view as Figure 4 , shown in a state in which a rotational torque is input to the output member in the reverse direction.

[0057] Figure 7 is a perspective view of the reverse input cut-off clutch of the first example, shown in a state in which the housing, the input-side bearing, and the output-side bearing are removed.

[0058] Figure 8 is an exploded perspective view of the reverse input cut-off clutch of the first example, shown in a state in which the housing, the input-side bearing, and the output-side bearing are removed.

[0059] Figure 9 ​is a perspective view showing the reverse input cut clutch of the first example in a state where the housing, the output member, the input side bearing, and the output side bearing are removed.

[0060] Figure 10 is a perspective view of a pair of engaging members each assembled with an elastic member, which constitute the reverse input cut clutch of the first example.

[0061] Figure 11 is a view of a pair of engaging members each assembled with an elastic member and a reinforcing member, which constitute the reverse input cut clutch of the first example, viewed from the output member side in the axial direction.

[0062] Figure 12 is a view of a main plate of the engaging member, which constitutes the reverse input cut clutch of the first example, viewed from the axial direction.

[0063] Figure 13 is a view of the elastic member, which constitutes the reverse input cut clutch of the first example, and specifically, Figure 13 (A) is a plan view, Figure 13 (B) is a front view viewed from Figure 13 (A) from below, Figure 13 (C) is a perspective view.

[0064] Figure 14 is an enlarged view of the left-right direction central portion of the upper half portion of Figure 4 .

[0065] Figure 15 (A)(a) is a view showing the engaging portion of the engaging member and the input side engaging portion in a state before a rotational torque is input to the input member, which shows the configuration of the first example, Figure 15 (A)(b) is a view showing a state after a rotational torque is input to the input member from Figure 15 the state shown in (A)(a), Figure 15 (B)(a) is a view showing the engaging portion of the engaging member and the input side engaging portion in a state before a rotational torque is input to the input member, which shows the configuration of the reference example corresponding to the existing configuration, Figure 15 (B)(b) is a view showing a state after a rotational torque is input to the input member from Figure 15 the state shown in (B)(a).

[0066] Figure 16 (A) and Figure 16 (B) are views showing the state before and after the output side engaging portion and the output side engaged portion are engaged, which show the reverse input cut clutch of the first example.

[0067] Figure 17 is a sectional view showing a part of the reverse input cut clutch of the second example of the embodiment of the present application.

[0068] Figure 18 This represents a portion of the reverse input disengagement clutch in the second example, equivalent to... Figure 4 The image.

[0069] Figure 19 This represents a portion of the reverse input disengagement clutch in the second example, equivalent to... Figure 5 The image.

[0070] Figure 20 This is a cross-sectional view showing the existing reverse input cut-off clutch.

[0071] Figure 21 This refers to the state of inputting rotational torque to the input component in the existing reverse input cut-off clutch. Figure 20 B-B sectional view.

[0072] Figure 22 This refers to the state where the existing reverse input cut-off clutch indicates the reverse input of rotational torque to the output component. Figure 20 B-B sectional view. Detailed Implementation

[0073] [First example]

[0074] use Figures 1-16 The first example of an embodiment of the present invention will be described.

[0075] In the following description, unless otherwise specified, axial, radial, and circumferential directions refer to the axial, radial, and circumferential directions of the reverse input cut-off clutch 1, and more specifically, the axial, radial, and circumferential directions of the pressed surface (pressed surface 24 of the outer diameter side cylinder 19 of the housing 4) of the pressed component constituting the reverse input cut-off clutch 1. In this example, the axial, radial, and circumferential directions of the reverse input cut-off clutch 1 are consistent with the axial, radial, and circumferential directions of the input component 2, and also consistent with the axial, radial, and circumferential directions of the output component 3. Regarding the reverse input cut-off clutch 1, the axial side is... Figure 1 , Figure 3 , Figure 7 , Figure 8 , Figure 9 as well as Figure 10 On the right side, the other side of the axis is Figure 1 , Figure 3 , Figure 7 , Figure 8 , Figure 9 as well as Figure 10 On the left side.

[0076] The reverse input cut clutch 1 of this example has an input member 2, an output member 3, a housing 4 as a pressed member, a pair of engaging members 5 as engaging members, and a pair of elastic members 50 as elastic members. The reverse input cut clutch 1 has a reverse input cut function, that is, with respect to transmission of a rotational torque input to the input member 2 to the output member 3, a rotational torque input in reverse to the output member 3 is completely cut off without being transmitted to the input member 2 or only a part of it is transmitted to the input member 2 and the remaining part is cut off.

[0077] The input member 2 is connected to an input side mechanism such as an electric motor and is input with a rotational torque. The input member 2 of this example has a pair of input side engaging portions 6 as input side engaging portions. In the case of embodying the present application, the input member 2 can be configured by combining a plurality of parts, or can be integrally configured as one part. In this example, as shown in Figs. 1 and 2, the input member 2 is configured by combining a shaft member 7 and a pair of input side engaging pins 8. Figure 1 Figure 3 Figure 8

[0078] The shaft member 7 has an input shaft portion 9 and a pair of input arm portions 10.

[0079] The input shaft portion 9 is configured in a substantially cylindrical shape, and an end portion on one axial side thereof is connected to an output portion of the input side mechanism.

[0080] The pair of input arm portions 10 are elongated from an end portion on the other axial side of the input shaft portion 9 toward diametrically opposite sides of each other. Each of the pair of input arm portions 10 has a support hole 11 as a through hole in the axial direction at a diametrically intermediate portion thereof.

[0081] Each of the pair of input side engaging pins 8 is configured by a cylindrical pin. An end portion on one axial side of the input side engaging pin 8 is fixedly embedded in the support hole 11 of the input arm portion 10 by press fitting. In this example, the input side engaging portion 6 is configured by the axial intermediate portion and the end portion on the other axial side of the input side engaging pin 8.

[0082] In this example, the input arm portions and the input side engaging portions are configured by the pair of input arm portions 10 and the pair of input side engaging portions 6 in accordance with the number of engaging members, that is, in accordance with the engaging members being configured by a pair of engaging members. However, in the case of embodying the present application, the number of input arm portions and input side engaging portions is not limited to two, and the number of input arm portions and input side engaging portions can be set to one or more than three in accordance with the number of engaging members.

[0083] The output member 3 is connected to an output side mechanism such as a reduction mechanism and outputs a rotational torque. The output member 3 is coaxially arranged with the input member 2, as shown in Figs. 1 and 2. Figure 3 Figure 4 ​​​​As shown, the output member 3 has an output shaft portion 12 and an output side engaging portion 13. In the case of embodying the present application, the output member 3 can be configured by combining a plurality of parts, or can be configured as a whole, i.e., by one part. In the present example, the output member 3 is configured by one part.

[0084] The output shaft portion 12 is configured in a substantially cylindrical shape, and the end portion on the other axial side is connected to the input portion of the output side mechanism described above.

[0085] The output side engaging portion 13 is configured in a substantially elliptical cylindrical shape, and is elongated from the central portion of the end surface on the one axial side of the output shaft portion 12 toward the one axial side. As shown in Figures 4-6 Figure 16 (A) and Figure 16 (B), the outer peripheral surface of the output side engaging portion 13 has side surfaces 14 on both sides in the short axis direction (the up-and-down direction in Figures 4-6 Figure 16 (A) and Figure 16 (B), and guide surfaces 15 configured by side surfaces on both sides in the long axis direction (the left-and-right direction in Figures 4-6 Figure 16 (A) and Figure 16 (B). The guide surfaces 15 are disposed on both sides of the side surfaces 14, and in the present example, the guide surfaces 15 on both sides of the side surfaces 14 are continuous in the short axis direction and are each configured by one curved surface.

[0086] Each of the side surfaces 14 is configured by a flat surface orthogonal to the short axis direction of the output side engaging portion 13. Each of the guide surfaces 15 is configured by a convex curved surface. Specifically, the guide surfaces 15 are configured by a partial cylindrical convex surface having the central axis of the output side engaging portion 13 (the central axis of the output member 3) as the center. Thus, with respect to the output member 3, for example, the outer peripheral surface of a round bar raw material can be used as the guide surfaces 15, and the corresponding processing cost can be suppressed. However, in the case of embodying the present application, each of the guide surfaces can be configured by a partial cylindrical convex surface having an axis parallel to the central axis of the output member 3 as the center, or a partial elliptical cylindrical convex surface, or the like, i.e., a non-cylindrical convex surface. The output side engaging portion 13 is disposed radially inward of the pair of input side engaging portions 6, and specifically, is disposed in the portion between the pair of input side engaging portions 6.

[0087] In the present example, depending on the number of engaging members described later, i.e., depending on whether the engaging members are configured by one pair of engaging members, the side surfaces and the guide surfaces disposed on both sides thereof are configured by one pair of side surfaces 14 and the guide surfaces 15 on both sides of each of the side surfaces 14. However, in the case of embodying the present application, the number of side surfaces is not limited to two, and depending on the number of engaging members, the number of side surfaces can be set to one or more than three.

[0088] As shown in Figure 1 and Figure 2 ​​​As shown, the housing 4 is a hollow disc, fixed to other parts not shown, so that its rotation is restricted. The housing 4 is coaxially arranged with the input member 2 and the output member 3, and houses a pair of input-side engaging portions 6, output-side engaging portions 13, a pair of engaging members 5, and the like, inside thereof. The housing 4 is formed by joining an input-side housing element (housing main body) 16 arranged on one axial side and an output-side housing element 17 (housing cover) arranged on the other axial side, using a plurality of bolts 18.

[0089] The input-side housing element 16 has a cylindrical outer-diameter side cylinder portion 19, a cylindrical inner-diameter side cylinder portion 20, a hollow circular flat plate portion 21, and a flange portion 22. The inner-diameter side cylinder portion 20 is coaxially arranged with the outer-diameter side cylinder portion 19 on the one axial side of the outer-diameter side cylinder portion 19. The end portion of the radial outer side of the flat plate portion 21 is joined with the end portion of the one axial side of the outer-diameter side cylinder portion 19, and the end portion of the radial inner side of the flat plate portion 21 is joined with the end portion of the other axial side of the inner-diameter side cylinder portion 20. The flange portion 22 protrudes toward the radial outer side from the axial middle portion of the outer-diameter side cylinder portion 19. The flange portion 22 has a plurality of (eight in the illustrated example) through-holes 23 that pass through in the axial direction.

[0090] The outer-diameter side cylinder portion 19 has a pressed surface 24 on the inner peripheral surface. The pressed surface 24 is formed of a cylindrical surface centered on the central axis of the input-side housing element 16. The outer-diameter side cylinder portion 19 has an input-side socket-fitting engagement surface 25 on the outer peripheral surface that is the end portion on the other axial side of the portion located on the other axial side than the flange portion 22. The input-side socket-fitting engagement surface 25 is formed of a cylindrical surface centered on the central axis of the input-side housing element 16. The inner-diameter side cylinder portion 20 has an input-side bearing engagement surface 26 on the portion of the inner peripheral surface from the end portion on the other axial side to the middle portion. The input-side bearing engagement surface 26 is formed of a cylindrical surface centered on the central axis of the input-side housing element 16. That is, the pressed surface 24, the input-side socket-fitting engagement surface 25, and the input-side bearing engagement surface 26 are coaxially arranged with each other.

[0091] The output-side housing element 17 has a hollow circular flat plate portion 27, a cylindrical inner-diameter side cylinder portion 28, and a hollow circular flat plate portion 29. The inner-diameter side cylinder portion 28 is coaxially arranged with the flange portion 27 on the other axial side of the flange portion 27. The end portion of the radial outer side of the flat plate portion 29 is joined with the end portion of the other axial side of the flange portion 27, and the end portion of the radial inner side of the flat plate portion 29 is joined with the end portion of the one axial side of the inner-diameter side cylinder portion 28.

[0092] The flange portion 27 has an output-side socket-fitting surface 30 on the inner peripheral surface of the portion on the one axial side. The output-side socket-fitting surface 30 is constituted by a cylindrical surface centered on the central axis of the output-side housing member 17. The output-side socket-fitting surface 30 has an inner diameter dimension with which the input-side socket-fitting surface 25 of the input-side housing member 16 can be fitted without play. The flange portion 27 has screw holes 31 at multiple locations (eight locations in the illustrated example) in the circumferential direction of the end portion on the radially inner side that is integrated with the through hole 23 of the input-side housing member 16. The flange portion 27 has mounting holes 32 that pass through in the axial direction at multiple locations (four locations in the illustrated example that are equally spaced in the axial direction) in the circumferential direction of the radially intermediate portion. The mounting holes 32 are used for insertion of mounting members for fixing the assembled housing 4 to other members that are not shown. The inner diameter side cylindrical portion 28 has an output-side bearing-fitting surface 33 on the portion of the inner peripheral surface from the end portion on the one axial side to the intermediate portion. The output-side bearing-fitting surface 33 is constituted by a cylindrical surface centered on the central axis of the output-side housing member 17. That is, the output-side socket-fitting surface 30 and the output-side bearing-fitting surface 33 are coaxially arranged with each other.

[0093] In a state in which the input-side socket-fitting surface 25 of the input-side housing member 16 and the output-side socket-fitting surface 30 of the output-side housing member 17 are fitted without play and in which the side surface on the other axial side of the flange portion 22 of the input-side housing member 16 and the side surface on the one axial side of the flange portion 27 of the output-side housing member 17 are in abutment, the bolts 18 that pass through the respective through holes 23 are threadedly engaged with the respective screw holes 31, and further fastened, whereby the input-side housing member 16 and the output-side housing member 17 are fixedly joined, and the housing 4 is assembled.

[0094] In the present example, the input-side socket-fitting surface 25 and the input-side bearing-fitting surface 26 of the input-side housing member 16 are coaxially arranged with each other, and the output-side socket-fitting surface 30 and the output-side bearing-fitting surface 33 of the output-side housing member 17 are coaxially arranged with each other. Therefore, in the assembled state of the housing 4 in which the input-side socket-fitting surface 25 and the output-side socket-fitting surface 30 are fitted without play, the input-side bearing-fitting surface 26 and the output-side bearing-fitting surface 33 are coaxially arranged with each other.

[0095] In the state in which the housing 4 is assembled, the input shaft portion 9 of the input member 2 is rotatably supported with respect to the input-side bearing-fitting surface 26 of the input-side housing member 16 by an input-side bearing 34 that is an additional constituent element of the present example. Also, the output shaft portion 12 of the output member 3 is rotatably supported with respect to the output-side bearing-fitting surface 33 of the output-side housing member 17 by an output-side bearing 35 that is an additional constituent element of the present example. Thereby, the input member 2 and the output member 3 are coaxially arranged with each other, and coaxially arranged with respect to the pressed surface 24 of the housing 4. Further, in this state, the pair of input-side engaging portions 6 and the output-side engaging portions 13 are arranged on the radially inner side of the pressed surface 24 of the housing 4.

[0096] Further, in the case where the performance of switching the lock-up or semi-lock-up state to the non-lock-up state (lock-up release performance) and the like is desired to be high, the reverse input cut clutch 1 needs to be strictly managed in terms of the coaxiality and inclination of the input member 2 and the output member 3. In this case, a general bearing utilization method of changing the input side bearing 34 and the output side bearing 35 from the illustrated single-row rolling bearing to a multi-row rolling bearing or the like can be applied. Further, in the case where the present application is implemented, the input side bearing can be omitted as long as the coaxiality of the input member with respect to the pressed surface is ensured. In addition, the output side bearing can be omitted as long as the coaxiality of the output member with respect to the pressed surface is ensured.

[0097] Each of the pair of engaging members 5 has a pressed surface 39 facing the pressed surface 24, an input side engaged portion 47 engageable with the input side engaging portion 6, and an output side engaged portion 40 engageable with the output side engaging portion 13, and is arranged to be movable in a first direction (the up-and-down direction indicated by the arrow a in FIG. 1, that is, the direction of the proximity and the distance with respect to the pressed surface 24) on the radially inner side of the pressed surface 24. Figure 4 The engaging member 5 has only one main plate 36 having the pressed surface 39 and the output side engaged portion 40. The pair of engaging members 5 is arranged to sandwich the output side engaging portion 13 from the radially both sides. In the present example, the number of the engaging members 5 is two, and either one of the engaging members 5 is arranged to be movable in the first direction with respect to the pressed surface 24. However, in the case where the present application is implemented, the number of the engaging members can be one or more than three as long as the pressed surface 39 of the engaging member 5 is arranged to be movable in the first direction with respect to the pressed surface 24. Further, the relationship of each of the pair of engaging members 5 with respect to the pressed surface 24, the input side engaging portion 6, and the output side engaging portion 13 and the function thereof are common, and therefore, hereinafter, the description will be made only on one side of the engaging member 5 from the viewpoint of simplification of the description except for the description on the arrangement of the engaging members 5 with respect to each other.

[0098] In the present example, the engaging member 5 has the main plate 36, a pair of link member 37, and a swing support shaft 38.

[0099] In the present example, the main plate 36 has a substantially semicircular plate shape. In the present example, the thickness dimension of the main plate 36 is smaller than the axial dimension of the output side engaging portion 13. The main plate 36 has a pair of pressed surfaces 39 facing the pressed surface 24, an output side engaged portion 40, and a swing support portion 41.

[0100] In this example, the outer peripheral surface of the body plate 36 is composed of a convex circular-arc-shaped radial outer side surface corresponding to the arc of the body plate 36 and a crank-shaped radial inner side surface corresponding to the chord of the body plate 36. Further, with respect to the body plate 36, the radial direction refers to the direction orthogonal to the chord of the body plate 36, Figures 4-6 the vertical direction in FIG. 6 and the direction of the distance of the body plate 36 with respect to the pressed surface 24. In addition, with respect to the body plate 36, the width direction refers to the direction parallel to the chord of the body plate 36, Figure 5 the lateral direction indicated by the arrow β in FIG. 6 and the direction orthogonal to either one of the radial direction of the body plate 36 and the axial direction of the pressed surface 24. In this example, the radial direction of the body plate 36 corresponds to the first direction which is the direction of the distance of the engaging member 5 with respect to the pressed surface 24. In this example, the width direction of the body plate 36 corresponds to the second direction which is orthogonal to either one of the first direction and the axial direction of the pressed surface 24.

[0101] The pair of engaging members 5 is disposed on the radial inner side of the pressed surface 24 in a state in which the radial outer side surface of each body plate 36 faces the opposite side and the radial inner side surface of each body plate 36 faces each other. The inner diameter dimension of the pressed surface 24 and the radial dimension of the body plate 36 are limited so that, in this state, a gap that allows the body plate 36 to move in the radial direction exists in at least one of the portion between the pressed surface 24 and the radial outer side surface of the body plate 36 and the portion between the radial inner side surfaces of the body plates 36.

[0102] The pair of pressed surfaces 39 is provided at two positions on the radial outer side surface of the body plate 36 that are separated in the circumferential direction. The pair of pressed surfaces 39 is a portion that is pressed against the pressed surface 24 in the locked or semi-locked state of the output member 3. The pressed surface 39 protrudes toward the pressed surface 24 more than the portion of the radial outer side surface of the body plate 36 that is separated in the circumferential direction from the pressed surface 39. The pressed surface 39 is composed of a convex surface that is a portion-cylinder shape having a smaller curvature radius than the curvature radius of the pressed surface 24. The portion of the radial outer side surface of the body plate 36 that is located in the circumferential direction between the pair of pressed surfaces 39 is a non-contact surface that does not contact the pressed surface 24.

[0103] The output-side engaged portion 40 is composed of a recess provided to the side surface of the body plate 36 on the side that is farther from the pressed surface 24. More specifically, the output-side engaged portion 40 is composed of a substantially rectangular recess that is recessed toward the radial outer side in the width direction central portion of the radial inner side surface of the body plate 36. As Figures 4-6 indicated in FIG. 6, the pair of engaging members 5 is disposed so as to sandwich the output-side engaged portion 13 from the radial outer side with each output-side engaged portion 40.

[0104] As Figures 4-6 , Figure 16 (A) and Figure 16As shown in (B), the output-side engaged portion 40 has a size of the front half of the short-axis direction in which the output-side engaged portion 13 can be arranged. Here, the front half of the short-axis direction of the output-side engaged portion 13 is, for example, the half of the short-axis direction of the output-side engaged portion 13 that is closer to the front side of the main body plate 36 than the half of the short-axis direction of the output-side engaged portion 13 that is closer to the rear side of the main body plate 36. Figure 4 Here, the half of the output-side engaged portion 13 that is on the upper side with respect to the engaged member 5 arranged on the upper side and the half of the output-side engaged portion 13 that is on the lower side with respect to the engaged member 5 arranged on the lower side. In particular, in this example, as shown in (B), the output-side engaged portion 40 has a size of the front half of the short-axis direction in which the output-side engaged portion 13 can be arranged. Figure 5 and Figure 16 As shown in (B), the output-side engaged portion 40 has an inner surface shape that coincides with the outer peripheral surface of the front half of the short-axis direction of the output-side engaged portion 13.

[0105] The inner surface of the output-side engaged portion 40 has a bottom surface 42 and guide surfaces 43 arranged on both sides of the bottom surface 42. The bottom surface 42 is composed of a flat surface that is orthogonal to the radial direction of the main body plate 36. The guide surfaces 43 are located at the ends of the inner surface of the output-side engaged portion 40 in the width direction of the main body plate 36 and face each other in the width direction. Each guide surface 43 is composed of a concave curved surface that is inclined in a direction in which the distance between the two guide surfaces 43 increases, as it goes toward the radial inner side of the main body plate 36, that is, as it goes in a direction away from the pressed surface 24 in the radial direction of the main body plate 36.

[0106] The guide surfaces 43 are capable of contacting the guide surfaces 15 of the output-side engaged portion 13 and are composed of a portion-cylindrical concave surface having a curvature radius that is the same size as the guide surfaces 15 or a slightly larger curvature radius than the guide surfaces 15. That is, in this example, as shown in (B), the guide surfaces 43 of the output-side engaged portion 40 are composed of a portion-cylindrical concave surface having a curvature radius that is the same size as the guide surfaces 15 of the output-side engaged portion 13. Figure 5 and Figure 16 As shown in (B), the output-side engaged portion 40 has an inner surface shape that coincides with the outer peripheral surface of the front half of the short-axis direction of the output-side engaged portion 13. That is, the bottom surface 42 of the output-side engaged portion 40 can be brought into surface contact with the side surface 14 of the output-side engaged portion 13, and the guide surfaces 43 of the output-side engaged portion 40 can be brought into surface contact with the guide surfaces 15 of the output-side engaged portion 13. Furthermore, in the case of implementing the present application, the guide surfaces can also be non-cylindrical concave surfaces such as portion-elliptical cylindrical concave surfaces.

[0107] The swing support portion 41 is provided at the radially outer side of the width direction central portion of the main body plate 36. The swing support portion 41 is a portion that swingably supports the link member 37 via the swing support shaft 38. In this example, the swing support portion 41 is composed of a circular hole that corresponds to a plate-side through hole that penetrates the radially outer side of the width direction central portion of the main body plate 36 in the axial direction.

[0108] The main plate 36 has an insertion hole 44 on the radially inner side of the widthwise central portion. The insertion hole 44 is formed by an arc-shaped elongated hole that extends in the circumferential direction and that penetrates the radially inner side of the widthwise central portion of the main plate 36 in the axial direction. The input-side engaging portion 6 is inserted into the insertion hole 44. The insertion hole 44 has a size that allows the input-side engaging portion 6 to be loosely inserted therein. Specifically, when the input-side engaging portion 6 is inserted into the insertion hole 44, a gap in the circumferential direction and a gap in the radial direction of the main plate 36 exist between the input-side engaging portion 6 and the inner surface of the insertion hole 44. Thus, the input-side engaging portion 6 can be displaced in the rotational direction of the input member 2 relative to the insertion hole 44 (the main plate 36) based on the existence of the gap in the circumferential direction, and the insertion hole 44 (the main plate 36) can be displaced in the radial direction of the main plate 36 relative to the input-side engaging portion 6 based on the existence of the gap in the radial direction of the main plate 36. In other words, the size of the insertion hole 44 is limited so that, when the reverse input cut clutch 1 is operated as described later, the inner periphery of the insertion hole 44 and the input-side engaging portion 6 do not interfere with each other to hinder the operation.

[0109] In particular, as shown in FIG. 2, the main plate 36 has a first protrusion 45 that protrudes toward the radially inner side in the widthwise central portion of the radially inner surface. The main plate 36 has a second protrusion 46 that protrudes toward the radially inner side in the widthwise end portions of the radially inner surface. Figure 10

[0110] The pair of link members 37 are arranged so as to sandwich the main plate 36 from both axial sides, and each link member 37 is arranged adjacent to the main plate 36 in the axial direction. However, in the case of implementing the present application, only one link member can be arranged adjacent to the main plate 36 on either side in the axial direction.

[0111] Each link member 37 is a press-formed product manufactured by performing blanking processing based on press processing on a metal plate such as a steel plate, and has a substantially elliptical plate shape. The link member 37 has an input-side engaging portion 47 on the radially inner portion of the main plate 36 on one side portion in the longitudinal direction thereof, and has a swing support portion 48 on the radially outer portion of the main plate 36 on the other side portion in the longitudinal direction thereof. In particular, in the configuration of the present example, the link member 37 has an elongated hole 49 that extends in the longitudinal direction thereof. The input-side engaging portion 47 is formed by the end portion on one side in the longitudinal direction of the elongated hole 49. The swing support portion 48 is formed by the end portion on the other side in the longitudinal direction of the elongated hole 49, i.e., a link-side through hole. However, in the case of implementing the present application, the input-side engaging portion can be formed by a circular hole that penetrates the link member in the axial direction, and the swing support portion can be formed by a circular hole that penetrates the link member in the axial direction, i.e., a link-side through hole.​

[0112] The input-side engaging portion 47 is inserted through the input-side engaging portion 6. Thus, one side portion in the longitudinal direction of the link member 37 is swingably connected to the input-side engaging portion 6.

[0113] The swing support shaft 38 is formed in a cylindrical shape and is inserted through the swing support portion 41 of the main plate 36 and the swing supported portion 48 of each link member 37. Thus, the other side portion in the longitudinal direction of the link member 37 is swingably supported to the swing support portion 41 of the main plate 36 via the swing support shaft 38. In this example, the swing support shaft 38 is clearance-fitted to the swing support portion 41 of the main plate 36 in the axial middle portion and is rotatably fitted to the swing supported portion 48 of the link member 37 in the axial both side portions. The axial middle portion of the swing support shaft 38 can also be press-fitted to the swing support portion 41 of the main plate 36 in a manner that is not rotatable.

[0114] Further, in the case of implementing the present application, the swing support portion of the main plate can also be formed by a cylindrical protrusion and the swing supported portion of the link member can also be formed by a hole in which the cylindrical protrusion is rotatably fitted. Alternatively, the swing supported portion of the link member can also be formed by a cylindrical protrusion and the swing support portion of the main plate can also be formed by a hole in which the cylindrical protrusion is rotatably fitted.

[0115] In this example, it is set that, in a state in which the pair of pressing surfaces 39 of the engaging member 5 are in contact with the pressed surface 24 and the input-side engaging portion 6 is located at the width direction central portion of the main plate 36, as shown in Figure 4 and Figure 6 As shown in Figure 14 , the interval Wa between the end edges of the swing support shaft 38 and the input-side engaging portion 6 on the side that is apart from each other is below the interval Wb between the end edges of the swing supported portion 48 and the input-side engaging portion 47 on the side that is apart from each other (Wa≤Wb). Further, in terms of the difference Wb-Wa of these intervals Wa and Wb, it is desirable to be as large as possible from the viewpoint of easily assembling the reverse input cut clutch 1, but on the other hand, it is desirable to be as small as possible from the viewpoint of being able to achieve the non-locking state by immediately moving the engaging member 5 to the radially inner side when inputting the rotational torque to the input member 2 as described later.

[0116] Each elastic member 50 of the pair of elastic members 50 is in a neutral state (S0) in which the rotational torque is not applied to either one of the input member 2 and the output member 3. Figure 4In all the operating states (as shown), the device is elastically clamped between the output side engaging portion 13 and the engaging member 5, thereby pressing the output side engaging portion 13 toward the side away from the pressed surface 24 in the first direction, i.e., radially inward, and pressing the engaging member 5 toward the side close to the pressed surface 24 in the first direction, i.e., radially outward.

[0117] That is, in all usage states including the neutral state, the elastic member 50 is clamped between the engaging member 5 and the output-side engaging part 13, so that a part (in this example, the two sides of the main body plate 36 in the width direction) is pressed radially inward by the engaging member 5, and another part (in this example, the middle part of the main body plate 36 in the width direction) is pressed radially outward by the output-side engaging part 13. Through its reaction force, the engaging member 5 is pressed radially outward, and the output-side engaging part 13 is pressed radially inward.

[0118] In all operating states, including the neutral state, the elastic member 50 presses the engaging member 5 radially outward, thereby pressing the pressing surface 39 of the engaging member 5 against the pressed surface 24. The reason for pressing the pressing surface 39 of the engaging member 5 against the pressed surface 24, especially in the neutral state, is that a locking state can be immediately achieved when a rotational torque is input in the opposite direction to the output member 3.

[0119] The elastic member 50 has an elastic pressing portion 59, and the elastic pressing portion 59 is elastically pressed against the output side engaging portion 13. The elastic pressing portion 59 is located in a position that overlaps with the output side engaging portion 13 in the radial direction of the main body plate 36 in the first direction, and is offset axially from the output side engaging portion 40 of the main body plate 36 in the axial direction of the pressed surface 24.

[0120] The elastic member 50 is not fixed to either the output member 3 or the engaging member 5, but is elastically held between the output-side engaging portion 13 and the engaging member 5. However, in implementing the present invention, the elastic member can be fixed to either the engaging member or the output member. When fixing the elastic member to the engaging member or the output member, various fixing methods such as threaded fixing, riveting, or bonding can be used.

[0121] In this example, such as Figure 4 , Figure 10 as well as Figure 13 (A)~ Figure 13 As shown in (C), the elastic member 50 is composed of a leaf spring. The elastic member 50 is configured to extend in the width direction of the main body plate 36, corresponding to the second direction. In this example, the elastic member 50 has a crank shape. In this example, the leaf spring of the elastic member 50 extends in the width direction of the main body plate 36. Figure 13 (A) Vertical dimension W 50It is larger than the thickness of the main plate 36 and smaller than the axial dimension of the output side engagement part 13.

[0122] In this example, the elastic member 50 includes a support plate portion 51, a pressing plate portion 52, and a connecting plate portion 53. The support plate portion 51 is configured as a long plate and is disposed on both sides of the elastic member 50 in the extension direction. The pressing plate portion 52 is configured as a long plate, is substantially parallel to each of the support plate portions 51, and is disposed at the center of the elastic member 50 in the extension direction. The connecting plate portion 53 connects the ends of the support plate portions 51 and the ends of the pressing plate portions 52 that are adjacent to each other in the length direction of the elastic member 50. Each connecting plate portion 53 is disposed non-parallel to each other and is inclined in a direction that is further away from the pressing plate portion 52 in the thickness direction of the support plate portion 51 and the pressing plate portion 52, and further away from the pressing plate portion 52 in the extension direction of the elastic member 50.

[0123] Furthermore, in implementing this invention, the shape of the elastic member can be varied depending on the configuration relationship between the engaging member and the output-side engaging portion, and the structure of the bottom surface of the engaging member. That is, the elastic member can be shaped in various ways as long as it can be elastically clamped between the output-side engaging portion and the engaging member in all usage states, including the neutral state, thereby pressing the output-side engaging portion toward the side away from the pressed surface in the first direction and pressing the engaging member toward the side approaching the pressed surface in the first direction. In this case, the pressing force applied from the elastic member to the output-side engaging portion only needs to be generally directed toward the side away from the pressed surface in the first direction, and the pressing force applied from the elastic member to the engaging member only needs to be generally directed toward the side approaching the pressed surface in the first direction. In other words, as long as this condition is met, it is not necessary for the pressing force applied from the elastic member to each part of the output-side engaging portion and the pressing force applied from the elastic member to each part of the engaging member to be directed toward the first direction.

[0124] The elastic member 50 is located in the width direction of the main body plate 36 at the portion corresponding to the part integrated with the output side engaging portion 40. Figure 13 (A) and Figure 13 (B) The middle portion in the left-right direction has an extension along the width direction and is radially (in the direction corresponding to the first direction of the main body plate 36) Figure 13 (A) The front and back sides of the paper Figure 13 (B) The first through hole 54 extends in the vertical direction. In this example, the elastic pressing part 59 is axially (in the pressing surface 24) Figure 13 (A) Up and down directions Figure 13The elastic member 50 is provided on both sides of the first through-hole 54 in the front-rear direction of the paper surface in (B). In this example, the portions of the elastic member 50 that sandwich the first through-hole 54 from both sides in the width direction of the main body plate 36 at the portions where the elastic member 50 is detached from the first through-hole 54 in the width direction of the main body plate 36 have second through-holes 55 that pass through in the radial direction of the main body plate 36.

[0125] In this example, as viewed in the radial direction of the main body plate 36, as shown in (A), the first through-hole 54 has a rectangular shape that is elongated in the width direction of the main body plate 36. This first through-hole 54 is provided so as to pass through the end portions of the pressing plate portion 52, the respective link plate portions 53, and the respective support plate portions 51 on the side close to the pressing plate portion 52. In the case of the first through-hole 54, as is clear from the portion that is integrated with the output-side engaged portion 40, it is a portion for not obstructing the direct engagement of the output-side engaged portion 13 and the output-side engaged portion 40. As viewed in the radial direction of the main body plate 36, as shown in (A), the respective second through-holes 55 have a rectangular shape. This second through-hole 55 is provided so as to pass through the middle portions of the support plate portions 51 in the width direction of the main body plate 36. Figure 13 (A) shown, the first through-hole 54 has a rectangular shape that is elongated in the width direction of the main body plate 36. This first through-hole 54 is provided so as to pass through the end portions of the pressing plate portion 52, the respective link plate portions 53, and the respective support plate portions 51 on the side close to the pressing plate portion 52. In the case of the first through-hole 54, as is clear from the portion that is integrated with the output-side engaged portion 40, it is a portion for not obstructing the direct engagement of the output-side engaged portion 13 and the output-side engaged portion 40. As viewed in the radial direction of the main body plate 36, as shown in (A), the respective second through-holes 55 have a rectangular shape. This second through-hole 55 is provided so as to pass through the middle portions of the support plate portions 51 in the width direction of the main body plate 36. Figure 13 (A) shown, the first through-hole 54 has a rectangular shape that is elongated in the width direction of the main body plate 36. This first through-hole 54 is provided so as to pass through the end portions of the pressing plate portion 52, the respective link plate portions 53, and the respective support plate portions 51 on the side close to the pressing plate portion 52. In the case of the first through-hole 54, as is clear from the portion that is integrated with the output-side engaged portion 40, it is a portion for not obstructing the direct engagement of the output-side engaged portion 13 and the output-side engaged portion 40. As viewed in the radial direction of the main body plate 36, as shown in (A), the respective second through-holes 55 have a rectangular shape. This second through-hole 55 is provided so as to pass through the middle portions of the support plate portions 51 in the width direction of the main body plate 36.

[0126] In this example, as shown in (A) and (B), the elastic member 50 is assembled to the radially inner side of the main body plate 36. In this state, the first protrusion 45 of the main body plate 36 is inserted through the first through-hole 54 of the elastic member 50 without wobbling, the second protrusion 46 of the main body plate 36 is inserted through the second through-hole 55 of the elastic member 50 without wobbling, the radially outer side of the middle portion of the plate width direction of the support plate portion 51 of the elastic member 50 abuts against the portion of the radially inner side of the main body plate 36 that is adjacent to both sides of the second protrusion 46 in the width direction of the main body plate 36, and the plate width direction both sides of the elastic member 50 protrude toward both sides in the axial direction of the main body plate 36. Figure 4 Figure 10 In this example, the elastic member 50 is restricted from displacement in the direction orthogonal to the radial direction corresponding to the first direction, that is, displacement in the axial direction of the pressed surface 24, and displacement in the width direction of the main body plate 36 corresponding to the second direction, based on the engagement with the engaging member 5, that is, the engagement of the first through-hole 54 with the first protrusion 45 and the engagement of the second through-hole 55 with the second protrusion 46. In addition, the elastic member 50 is restricted from displacement toward the radially outer side based on the abutment of the radially outer side of the support plate portion 51 against the portion of the radially inner side of the main body plate 36 that is adjacent to both sides of the second protrusion 46 in the width direction of the main body plate 36.

[0127] In this example, the elastic member 50 is restricted from displacement in the direction orthogonal to the radial direction corresponding to the first direction, that is, displacement in the axial direction of the pressed surface 24, and displacement in the width direction of the main body plate 36 corresponding to the second direction, based on the engagement with the engaging member 5, that is, the engagement of the first through-hole 54 with the first protrusion 45 and the engagement of the second through-hole 55 with the second protrusion 46. In addition, the elastic member 50 is restricted from displacement toward the radially outer side based on the abutment of the radially outer side of the support plate portion 51 against the portion of the radially inner side of the main body plate 36 that is adjacent to both sides of the second protrusion 46 in the width direction of the main body plate 36.

[0128] ​Furthermore, when implementing the present invention, the displacement of the elastic member 50 in a direction orthogonal to the first direction can be limited solely based on the engagement of the first through hole 54 with the first protrusion 45 and the engagement of the second through hole 55 with the second protrusion 46.

[0129] When viewed axially along the pressed surface 24, the pressing plate portion 52 constituting the elastic member 50 is positioned across the output-side engaging portion 40. That is, the middle portion of the pressing plate portion 52 in the longitudinal direction is positioned at the same location as the output-side engaging portion 40 in the width direction of the main body plate 36, corresponding to the second direction. In this example, the two sides of the pressing plate portion 52 in the width direction, i.e., the two sides of the pressing plate portion 52 separated by the first through hole 54 in the width direction, correspond to a pair of elastic pressing portions 59. The pair of elastic pressing portions 59 are positioned offset axially from the main body plate 36. In the free state of the elastic member 50, the pair of elastic pressing portions 59 are located radially inward from the bottom surface 42 of the output-side engaging portion 40 and are arranged substantially parallel to the bottom surface 42.

[0130] In particular, such as Figure 4 As shown, in a neutral state where the elastic member 50 is positioned between the output-side engaging portion 13 and the engaging member 5, and no rotational torque is applied to the input member 2 and the output member 3, the elastic pressing portion 59 contacts the side surface 14 of the output-side engaging portion 13 and slightly flexes outward. Therefore, the elastic member 50 is elastically clamped between the output-side engaging portion 13 and the engaging member 5. Consequently, the support plate portion 51 elastically presses the radially inner side surface of the main body plate 36 towards the radially outer side, and the elastic pressing portion 59 elastically presses the side surface 14 of the output-side engaging portion 13 towards the radially inner side.

[0131] As will be described later, when a rotational torque is input to input component 2 (refer to...) Figure 5 And when there is a rotational torque input to the output component 3 in the reverse direction (see reference). Figure 6 The elastic member 50 elastically deforms in such a way that the elastic pressing part 59 bends radially outward, allowing the output side engaging part 13 and the output side engaged part 40 to engage directly.

[0132] The reverse input cut-off clutch 1 in this example has a reinforcing member 56, which is mounted between the front ends of the input side engagement portions 6 of the pair of input side engagement portions 6 constituting the input component 2, that is, between the ends of the input side engagement pins 8 constituting the pair of input side engagement pins 8 on the other side of their respective axial direction.

[0133] like Figure 8 , Figure 9 as well as Figure 11As shown, the reinforcing member 56 is formed as a substantially rectangular plate. The reinforcing member 56 has a through-hole 57 with a substantially elliptical opening shape in the central portion, and a support hole 58 in portions sandwiching the through-hole 57 in the short diameter direction of the through-hole 57.

[0134] The output-side engaging portion 13 is inserted into the through-hole 57. The through-hole 57 has a size that allows the output-side engaging portion 13 to be loosely inserted. Thus, the output-side engaging portion 13 can be relatively rotated with respect to the through-hole 57 (the reinforcing member 56) inside the through-hole 57.

[0135] The support hole 58 has an inner diameter dimension that is slightly smaller than the outer diameter dimension of the front end portion of the input-side engaging portion 6. By pressing the front end portion of each of the input-side engaging portions 6 that constitute the pair of input-side engaging portions 6 into the support hole 58 of the reinforcing member 56, the reinforcing member 56 is erected between the front end portions of the input-side engaging portions 6 that constitute the pair of input-side engaging portions 6.

[0136] In the configuration of the present example, the pair of engaging members 5 and the pair of elastic members 50 are arranged between the input arm portion 10 that is a part of the input member 2 and the reinforcing member 56 in the axial direction. Thus, the axial positions of the pair of engaging members 5 and the pair of elastic members 50 are restricted between the input arm portion 10 of the input member 2 and the reinforcing member 56.

[0137] Specifically, in this state, the side surface of the input arm portion 10 on the other side in the axial direction is in sliding contact or in close proximity to the side surface of the oscillation support shaft 38 on the one side in the axial direction and the side surface of the link member 37 on the one side in the axial direction. Thus, the oscillation support shaft 38 is prevented from slipping out of the oscillation support portion 41 of the main body plate 36 toward the one side in the axial direction, and the link member 37 on the one side in the axial direction is prevented from falling off the oscillation support shaft 38 toward the one side in the axial direction.

[0138] In addition, the side surface of the reinforcing member 56 on the one side in the axial direction is in sliding contact or in close proximity to the side surface of the oscillation support shaft 38 on the other side in the axial direction and the side surface of the link member 37 on the other side in the axial direction. Thus, the oscillation support shaft 38 is prevented from slipping out of the oscillation support portion 41 of the main body plate 36 toward the other side in the axial direction, and the link member 37 on the other side in the axial direction is prevented from falling off the oscillation support shaft 38 toward the other side in the axial direction.

[0139] However, in the case of implementing the present application, the link member can be prevented from falling off the oscillation support shaft by a stopper ring or the like that is latched to the axial end portion of the oscillation support shaft.

[0140] In this example configuration, the input arm 10 and reinforcing member 56 of the input member 2 do not forcefully clamp a pair of engaging members 5 and a pair of elastic members 50 from both sides of the axial direction. As a result, the input arm 10 and reinforcing member 56 of the input member 2 do not obstruct the radial movement of each engaging member 5 and each elastic member 50, nor the swing of the connecting rod member 37.

[0141] Furthermore, in implementing this invention, as long as the axial positions of the pair of engaging members 5 and the pair of elastic members 50 can be limited as described above without hindering the radial movement of each engaging member 5 and each elastic member 50 and the swinging of the connecting rod member 37, the axial ends of the input-side engaging pin can be fitted into the support holes provided in the input arm and the reinforcing member respectively without interference. In this case, the input-side engaging pin can be prevented from falling off by the retaining ring locked to the end of the input-side engaging pin, the inner surface of the housing, etc.

[0142] In implementing this invention, the axial position of the elastic member 50 can be limited solely by the input arm 10 of the input member 2 and the reinforcing member 56. In this case, the engagement structure between the elastic member and the engaging member for limiting the axial position of the elastic member can be omitted.

[0143] Next, the operation of the reverse input disconnecting clutch 1 in this example will be explained.

[0144] When a rotational torque is input from the input-side mechanism to the input component 2, such as Figure 5 As shown, the input-side engaging portion 6 is along the rotation direction of the input component 2 ( Figure 5 In the example, the rotation is clockwise. As a result, the connecting rod 37 swings around the swing support shaft 38, while the swing support shaft 38 is pulled by the input-side engaging portion 6 via the connecting rod 37. Consequently, the engaging members 5 (main body plate 36) move radially inward away from the pressed surface 24. As a result, the elastic member 50 elastically deforms by displacing the elastic pressing portion 59 radially outward as the pressing surface 39 of the engaging member 5 moves away from the pressed surface 24. In other words, the elastic member 50 elastically deforms by displacing each support plate portion 51 radially inward. Then, a pair of output-side engaging portions 40 of the engaging member 5 clamp the output-side engaging portion 13 of the output member 3 from both radial sides, and the output-side engaging portion 13 and the pair of output-side engaging portions 40 are engaged without wobbling. As a result, the rotational torque input to the input member 2 is transmitted to the output member 3 via the pair of engaging members 5 and output from the output member 3.

[0145] In particular, in the construction of this example, when the ground locking member 5 moves radially inward as described above, such as from... Figures 4 to 5 And from Figure 16 (A) to Figure 16(B) As shown, the output-side engaged portions 40 are guided by the guide surfaces 15 of the output-side engaged portion 13, and the movement of the engaging member 5 in the widthwise direction is restricted. Then, as shown in Figure 5 and Figure 16 (B) As shown, the bottom surface 42 of the output-side engaged portion 40 is in surface contact with the side surface 14 of the output-side engaged portion 13, and the guide surface 43 of the output-side engaged portion 40 is in surface contact with the guide surface 15 of the output-side engaged portion 13. Therefore, in the configuration of this example, after the lock or semi-lock state is released, the engaging member 5 can be effectively prevented from moving in the widthwise direction to contact the pressed surface 24. In the configuration of this example, the output-side engaged portion 13 is used to guide the movement of the engaging member 5 to the radially inner side, and the number of parts can be reduced compared to a configuration in which other parts are incorporated only for this purpose.

[0146] In the configuration of this example, the guide surface 43 of the output-side engaged portion 40 is formed by a concave curved surface that is inclined in a direction in which the spacing between the two guide surfaces 43 increases as it goes toward the radially inner side, and the guide surface 15 of the output-side engaged portion 13 is formed by a convex curved surface that matches the above-mentioned concave curved surface. Therefore, as shown in Figure 16 (A) As shown, in a state in which the engaging member 5 is separated from the output-side engaged portion 13 to the radially outer side, a gap is formed between the guide surface 43 and the guide surface 15, and the size (widthwise dimension) of the gap increases as it goes toward the radially outer side. Therefore, in the configuration of this example, in a state in which the engaging member 5 is separated from the output-side engaged portion 13 to the radially outer side, the movement of the engaging member 5 in the widthwise direction and rotational direction can be moderately allowed, and the engaging member 5 can be effectively prevented from being subjected to excessive force.

[0147] On the other hand, when a rotational torque is input from the output-side mechanism to the output member 3 in the reverse direction, as shown in Figure 6 (A), the output-side engaged portion 13 is guided by the guide surface 43 of the output-side engaged portion 40 in the rotational direction of the output member 3, and the movement of the engaging member 5 in the widthwise direction and rotational direction is restricted. Then, as shown in Figure 6The corner portion of the side surface 14 of the output-side engaging portion 13 and the connecting portion of the guide surface 15 is elastically deformed by elastically deforming each elastic member 50 in such a manner that a part of the elastic pressing portion 59 is displaced to the radially outer side, and the bottom surface 42 of the output-side engaging portion 40 is directly pressed toward the radially outer side. Thus, each engaging member 5 is moved toward the direction in which the pressed surface 24 is approached (the radially outer side), and the pressed surface 39 of each engaging member 5 is pressed against the pressed surface 24 to be frictionally engaged. As a result, the rotational torque that is input in the reverse direction to the output member 3 is transmitted to the housing 4 that is fixed to the other member and does not rotate, and thus is completely cut off to be not transmitted to the input member 2, or only a part of the rotational torque that is input in the reverse direction to the output member 3 is transmitted to the input member 2, and the remaining part is cut off.

[0148] In order to completely cut off the rotational torque that is input in the reverse direction to the output member 3 to be not transmitted to the input member 2, the engaging member 5 is clamped between the output-side engaging portion 13 and the pressed surface 24 in such a manner that the pressed surface 39 does not slide, that is, does not rotate relative to the pressed surface 24, and the output member 3 is locked. In contrast, in order to transmit only a part of the rotational torque that is input in the reverse direction to the output member 3 to the input member 2 and cut off the remaining part, the engaging member 5 is clamped between the output-side engaging portion 13 and the pressed surface 24 in such a manner that the pressed surface 39 slides relative to the pressed surface 24, and the output member 3 is half-locked. In the state in which the output member 3 is half-locked, when the rotational torque is further input in the reverse direction to the output member 3, the engaging member 5 rotates with the rotation center of the output member 3 as a center while the pressed surface 39 slides relative to the pressed surface 24 based on the engagement of the output-side engaging portion 13 and the output-side engaging portion 40. When the engaging member 5 rotates, the input-side engaging portion 6 is pulled by the swing support shaft 38 via the link member 37, and a part of the rotational torque is transmitted to the input member 2.

[0149] In the present example, the engaging member 5 has the pressed surface 39 at two circumferentially separated places of the radially outer side surface of the main body plate 36, and thus the frictional engagement force of the pressed surface 24 and the pressed surface 39 can be increased by a wedge effect when the rotational torque is input in the reverse direction to the output member 3. However, in the case of implementing the present application, a configuration in which the pressed surface is provided only at one circumferential place of the radially outer side surface of the main body plate can also be adopted.

[0150] According to the reverse input cut clutch 1 of the present example, even in the neutral state, the wobble of the output member 3 can be suppressed.

[0151] That is, in the present example, the elastic member 50 is arranged in a position overlapping the output-side engaging portion 13 in the radial direction of the main body plate 36 corresponding to the first direction, and is elastically sandwiched between the output-side engaging portion 13 and the engaging member 5. Therefore, even if the interval between the pair of bottom surfaces 42 in the state where the reverse input cut clutch 1 is assembled is made larger than the thickness dimension of the output-side engaging portion 13 in the short axis direction, i.e., the interval between the pair of side surfaces 14, in consideration of the assembly operability of the reverse input cut clutch 1, the rotation of the output-side engaging portion 13 by a slight force can be prevented regardless of the gap between the output-side engaging portion 13 and the output-side engaged portion 40, and the wobble of the output member 3 can be suppressed. Thus, in the case where the reverse input cut clutch 1 of the present example is used for a purpose such as the adjustment of the position of a work table fixed to a nut or the adjustment of the steering angle of a tire, etc., even if a rotational torque is inputted in the reverse direction from the work table or the tire to the output member 3 via the nut, the position of the work table or the steering angle of the tire can be prevented from deviating abruptly from the adjusted position, i.e., the deviation can be made slow, and the generation of an abnormal noise can be prevented.

[0152] Unlike the configuration of the present example, in the case where the engaging member is configured to include two main body plates arranged separately in the axial direction of the pressed surface, the interference between the output-side engaged portion provided on the radially inner surface of the main body plate and the elastic member can be easily avoided by providing the elastic member between the two main body plates. That is, the output-side engaging portion of the output member and the output-side engaged portion of the main body plate can be easily made to engage directly without passing through the elastic member. On the other hand, in the case where the engaging member is provided with only one main body plate as in the configuration of the present example, if it is desired to avoid the interference between the output-side engaged portion and the elastic member by the same method as described above, a groove for providing the elastic member needs to be prepared on the radially inner surface of the main body plate. As a result, the shape of the main body plate becomes complicated, the degree of difficulty in processing the main body plate becomes high, and an increase in manufacturing cost cannot be avoided.

[0153] In contrast, in the configuration of the present example, the elastic member 50 has an elastic pressing portion 59 that elastically presses against the output-side engaging portion 13 of the output member 3, and the elastic pressing portion 59 is disposed at a position that is offset to both sides in the axial direction with respect to the output-side engaged portion 40 of the main plate 36. Therefore, even if a groove for disposing the elastic member 50 is not prepared on the radially inner side surface of the main plate 36, interference between the output-side engaged portion 40 provided on the radially inner side surface of the main plate 36 and the elastic member 50 can be easily avoided. Therefore, the shape of the main plate 36 can be simplified in an amount that can be achieved even if a groove for disposing the elastic member 50 is not prepared on the radially inner side surface of the main plate 36, and the degree of difficulty of processing the main plate 36 is reduced, so that manufacturing costs can be suppressed. Furthermore, the elastic member of the present application, as long as it has an elastic pressing portion 59 that elastically presses the output-side engaging portion 13 toward the radially inner side without interfering with the engagement of the output-side engaging portion 13 and the output-side engaged portion 40, is not limited to a configuration in which the engaging member has only one main plate, and can be applied to a configuration in which the engaging member has two or more main plates.

[0154] In the present example, the elastic member 50 is elastically sandwiched by the output-side engaging portion 13 and the engaging member 5 without being fixed to either of the output member 3 (output-side engaging portion 13) and the engaging member 5. Therefore, the work for fixing the elastic member 50 can be omitted, and the parts for fixing can be reduced. Therefore, reduction of manufacturing costs of the reverse input cut clutch 1 can be achieved. In addition, since the space for disposing the elastic member 50 is suppressed to be small, miniaturization of the reverse input cut clutch 1 can be achieved.

[0155] By engaging the elastic member 50 with respect to the engaging member 5 (main plate 36), displacement of the elastic member 50 in the axial direction, the width direction, and the radial direction can be restricted, respectively. Therefore, even if the elastic member 50 is not fixed to either of the output member 3 and the engaging member 5, displacement of the position of the elastic member 50 or falling of the elastic member 50 from between the output-side engaging portion 13 and the engaging member 5 can be suppressed. Therefore, the elastic member 50 can impart an elastic force of a desired magnitude and direction to the engaging member 5 and the output-side engaging portion 13.

[0156] The elastic member 50 has a function of pressing the pressing surface 39 of the engaging member 5 to the pressed surface 24 in the neutral state. Therefore, a dedicated part (spring or the like) for pressing the pressing surface 39 of the engaging member 5 to the pressed surface 24 in the neutral state is not required. Therefore, reduction of the number of parts can be achieved, and miniaturization of the reverse input cut clutch 1 can be achieved.

[0157] According to the reverse input cut clutch 1 of the present example, when a rotational torque is input to the input member 2, switching from the locked or semi-locked state to the unlocked state can be smoothly performed.Figure 15 (A) and Figure 15 (B) explains this point.

[0158] Figure 15 (a) and (b) of (A) show the positional relationship of a part of the input member 2 and a part of the engaging member 5 with respect to each other for the configuration of the present example. More specifically, Figure 15 (A) (a) shows the above positional relationship in a state where the input-side engaging portion 6 is located at the widthwise central portion of the engaging member 5 and the link member 37 is located at the radially innermost side. Figure 6 (A) (b) shows the above positional relationship in a state where the input-side engaging portion 6 is rotated toward the rotation direction of the input member 2 (the clockwise direction in the illustrated example) from the state shown in (a) of (A), and the translational load F starts to act on the oscillation support shaft 38 via the link member 37 from the input-side engaging portion 6. Figure 15 (A) (b) shows the above positional relationship in a state where the input-side engaging portion 6 is rotated toward the rotation direction of the input member 2 (the clockwise direction in the illustrated example) from the state shown in (a) of (A), and the translational load F starts to act on the oscillation support shaft 38 via the link member 37 from the input-side engaging portion 6. Figure 15 (A) (a) shows the above positional relationship in a state where the input-side engaging portion 6 is located at the widthwise central portion of the engaging member 5 and the link member 37 is located at the radially innermost side.

[0159] On the other hand, Figure 15 (a) and (b) of (B) show the positional relationship of a part of the input member 102z and a part of the engaging member 105 with respect to each other for the configuration of the reference example in which the engaging member 105 is integrally configured without the link member. More specifically, Figure 15 (B) (a) shows the above positional relationship in a state where the input-side engaging portion 107z is located at the widthwise central portion of the engaging member 105 in the locked or semi-locked state. Figure 15 (B) (b) shows the above positional relationship in a state where the input-side engaging portion 107z is rotated toward the rotation direction of the input member 102z (the clockwise direction in the illustrated example) from the state shown in (a) of (B), and the translational load Ft starts to act on the abutment portion X of the input-side engaging portion 107z and the input-side engaged portion 113 of the engaging member 105 based on the rotational torque T. Figure 15 (B) (a) shows the above positional relationship in a state where the input-side engaging portion 107z is located at the widthwise central portion of the engaging member 105 in the locked or semi-locked state.

[0160] In the configuration of the reference example, as shown in Figure 15 (B) (b), the direction of the translational load Ft, i.e., the direction of the load acting on the engaging member 105 from the input member 102z, is greatly inclined with respect to the direction in which the engaging member 105 should move when switching from the locked or semi-locked state to the unlocked state, i.e., the radial direction of the engaging member 105 (the direction of the distance of the engaging member 105 from the pressed surface).

[0161] In contrast, in the configuration of the present example, as shown in Figure 15 ​​As shown in (A)(b), the direction of the translational load F, i.e., the direction of the load acting from the input component 2 on the locking member 5, is approximately parallel to the direction in which the locking member 5 should move when switching from the locked or semi-locked state to the unlocked state, i.e., the radial direction of the locking member 5 (the direction of the locking member 5 relative to the pressed surface 24). In other words, the angle between the direction of the translational load F and the direction in which the locking member 5 should move is smaller than the angle between the direction of the translational load Ft and the direction in which the locking member 105 should move in the construction of the reference example. That is, in the construction of this example, the rotational torque T input to the input component 2 can be efficiently converted into a load for moving the locking member 5 radially inward. Therefore, according to the construction of this example, when the rotational torque is input to the input component 2, the switching from the locked or semi-locked state to the unlocked state can be performed smoothly.

[0162] Furthermore, regarding the construction in this example Figure 15 The size of the gap G (the aforementioned difference Wb-Wa) between the radially inner surface of the input-side engaging portion 6 and the inner peripheral surface of the input-side engaging portion 47 of the connecting rod member 37 in the state shown in (A)(a), and the construction of the reference example. Figure 15 In the state shown in (B)(a), the size of the gap Gz between the radially inner surface of the input-side engaging portion 107z and the input-side engaged portion 113 is desirable to be as large as possible from the viewpoint of facilitating the assembly of the reverse input cut-off clutch. However, from the viewpoint of enabling the engaging members 5 and 105 to move radially inward immediately when a rotational torque is input to the input members 2 and 102z, thus achieving a non-locked state, it is desirable to be as small as possible. Therefore, in the manufacture of the reverse input cut-off clutch, these factors need to be considered, and the size of the gaps G and Gz needs to be adjusted to an appropriate size.

[0163] In the construction of the reference example, in order to adjust the size of the gap Gz, it is sometimes necessary to perform high-precision finishing on the portion of the input-side engaging portion 113 that abuts against the radially inner surface of the input-side engaging portion 107z through cutting, which increases the cost. In contrast, in the construction of this example, the size of the gap G can be adjusted simply by managing the center distance between the input-side engaging portion 47 of the connecting rod member 37 and the swing-supported portion 48, and the connecting rod member 37 is manufactured by low-cost stamping, thus easily controlling costs.

[0164] Further, in the case where the engaging member is configured by swingably supporting the link member having the input-side engaged portion to the main plate having the pressing surface, a configuration is considered in which a pair of main plates are arranged apart from each other in the axial direction, and one link member is swingably arranged between the pair of main plates. However, in this configuration, the pair of main plates need to be joined in the state of being separated from each other in the axial direction, resulting in an increase in the number of parts. Further, in order to bring the pressing surfaces of the pair of main plates into abutment or sliding contact with the pressed surface in the locked or semi-locked state, the main plates are required to have high shape accuracy.

[0165] In contrast, in the present example, a configuration is adopted in which a pair of link members 37 each having an input-side engaged portion 47 are swingably supported to the main plate 36 having the pressing surfaces 39 on both sides in the axial direction of the main plate 36. Therefore, it is possible to suppress an increase in the number of parts, and it is not necessary to excessively increase the shape accuracy of the main plate 36, so that it is possible to suppress an increase in manufacturing cost. Further, when the pair of engaging members 5 are moved to the radially inner side upon input of a rotational torque from the input member 2, it is possible to prevent the main plate 36 from tilting in a manner of tilting to the axial direction.

[0166] The reinforcing member 56 is provided so as to be interposed between the front end portions of the pair of input-side engaged portions 6, and therefore, it is possible to prevent the pair of input-side engaged portions 6 from being deformed in a direction of being separated from each other. With regard to this reason, the following description is made.

[0167] When a reverse rotational torque is input to the output member 3, the pressing surfaces 39 of the pair of engaging members 5 are pressed against the pressed surface 24, and the respective pressing surfaces 39 are frictionally engaged with the pressed surface 24, and the reverse input cut-off clutch 1 is switched to the locked or semi-locked state. When the reverse rotational torque input to the output member 3 is increased, the force with which the respective pressing surfaces 39 are pressed against the pressed surface 24 is also increased, and the frictional engagement force acting between the respective pressing surfaces 39 and the pressed surface 24 is also increased.

[0168] When a rotational torque is input to the input member 2, the main plate 36 is moved in a direction in which the respective pressing surfaces 39 are separated from the pressed surface 24, and the respective pressing surfaces 39 are separated from the pressed surface 24, via the link member 37 and the swing support shaft 38, by each of the pair of input-side engaged portions 6. As a result, the reverse input cut-off clutch 1 is switched to the non-locked state.

[0169] In this case, when the reverse input cut clutch 1 is switched from the locked or semi-locked state to the unlocked state, the torque required to switch the reverse input cut clutch 1 from the locked or semi-locked state to the unlocked state (release torque) becomes large in the case where the rotational torque input to the output member 3 in the reverse direction is large and the frictional engagement force acting between each pressing surface 39 and the pressed surface 24 is large. In the configuration without the reinforcing member 56 as in this example, when the release torque becomes large, the input member 2 can be deformed in a manner of bending in a direction of separating from each other when the force applied to the input-side engagement portion 6 from the link member 37 in the radial direction of the main plate 36 toward the outside becomes large when the reverse input cut clutch 1 is switched from the locked or semi-locked state to the unlocked state. When such deformation occurs, the offset between the input-side engagement portion 6 and the input-side engaged portion 47 can easily occur to cause abrasion, or the main plate 36 can be inclined in a manner of tilting toward the axial direction when the reverse input cut clutch 1 is switched from the locked or semi-locked state to the unlocked state, and the switching to the unlocked state can not be smoothly performed.

[0170] The reverse input cut clutch 1 of this example is configured such that the reinforcing member 56 is provided between the front end portions of the input-side engagement portions 6 that constitute the pair of input-side engagement portions 6, and thus, the input-side engagement portions 6 can be prevented from being deformed in a direction of separating from each other. As a result, the offset between the input-side engagement portion 6 and the input-side engaged portion 47 can be prevented, the generation of abrasion can be suppressed, and the main plate 36 can be prevented from being inclined in a manner of tilting toward the axial direction, and the switching to the unlocked state can be smoothly performed.

[0171] [Second Example]

[0172] Use Figures 17-19 A second example of the embodiment of the present application will be described.

[0173] In the reverse input cut clutch la of this example, the configuration of the input member 2a and the pair of engagement members 5a is partially different from that of the first example. In the following description, only the portions different from the first example in the configuration of the second example will be described.

[0174] In this example, the input member 2a has an input shaft portion 9, a base plate portion 60, and a pair of input-side engagement portions 6a.

[0175] The base plate portion 60 has a substantially circular end surface shape when viewed in the axial direction.

[0176] The input shaft portion 9 protrudes from the central portion of the side surface of the base plate portion 60 on the one axial side toward the one axial side. A pair of input side engaging portions 6a protrude from the side surface of the base plate portion 60 on the other axial side at two positions diametrically opposite to each other toward the other axial side. In this example, each of the input side engaging portions 6a constituting the pair of input side engaging portions 6a has a substantially elliptical end surface shape elongated in the circumferential direction as viewed in the axial direction. In the case of embodying the present application, it is also possible to constitute each of the input side engaging portions constituting the pair of input side engaging portions from a separate piece manufactured separately from the base plate portion.

[0177] Each of the engaging members 5a constituting the pair of engaging members 5a is constituted only by one main plate 36a having the pressing surface 39 and the output side engaged portion 40. As for the main plate 36a, the shape of the radially outer side surface including the pair of pressing surfaces 39 and the shape of the radially inner side surface including the output side engaged portion 40 are the same as in the first example.

[0178] The main plate 36a has an input side engaged portion 47a. In this example, the input side engaged portion 47a has a substantially rectangular opening shape elongated in the width direction of the main plate 36a as viewed in the axial direction, and is constituted by a through hole passing through the radially intermediate portion of the width direction central position of the main plate 36a in the axial direction. The input side engaged portion 47a has a size capable of being loosely inserted into the input side engaging portion 6a. Therefore, in the state where the input side engaging portion 6a is inserted inside the input side engaged portion 47a, there are gaps in the width direction of the main plate 36a and in the radial direction between the input side engaging portion 6a and the inner surface of the input side engaged portion 47a, respectively. Therefore, the input side engaging portion 6a can be displaced in the rotational direction of the input member 2a with respect to the input side engaged portion 47a, and the main plate 36a provided with the input side engaged portion 47a can be displaced in the radial direction of the main plate 36a with respect to the input side engaging portion 6a. In this example, the end portion of the input side engaged portion 47a on the inner side in the radial direction of the main plate 36a in the inner peripheral surface is provided with a flat surface 61 facing outward in the radial direction.

[0179] In the assembled state of the reverse input cut clutch la, the pair of input side engaging portions 6a of the input member 2a are inserted into the input side engaged portions 47a of the pair of engaging members 5a in the axial direction. In the case of embodying the present application, as in the case of the first example, it is also possible to provide a reinforcing member spanning between the front end portions of the input side engaging portions 6a constituting the pair of input side engaging portions 6a.

[0180] When the rotational torque is input to the input member 2a from the input side mechanism, as Figure 19As shown, the input-side engaging portion 6a rotates in the direction of rotation of the input member 2a inside the input-side engaged portion 47a. Then, the radially inner side surface of the input-side engaging portion 6a presses the flat surface 61 of the input-side engaged portion 47a toward the radially inner side, and the engaging member 5a moves in the direction away from the pressed surface 24. Thus, the pressed surface 39 of the engaging member 5a moves away from the pressed surface 24. Consequently, the elastic member 50 elastically deforms in such a manner that the elastic pressing portion 59 constituting the elastic member 50 as a whole displaces to the radially outer side. Then, the pair of output-side engaged portions 40 sandwich the output-side engaging portion 13 of the output member 3 from both radially outer sides, and the output-side engaging portion 13 and the pair of output-side engaged portions 40 are engaged without shaking. As a result, the rotational torque input to the input member 2a is transmitted to the output member 3 via the pair of engaging members 5a, and is output from the output member 3.

[0181] On the other hand, when the rotational torque is input in the reverse direction from the output-side mechanism to the output member 3, the elastic member 50 elastically deforms by the same action as in the case of the first example, and the rotational torque input in the reverse direction to the output member 3 is completely cut off by being transmitted to the housing 4, and is not transmitted to the input member 2a, or only a part of the rotational torque input in the reverse direction to the output member 3 is transmitted to the input member 2a, and the remaining part is cut off. Figure 6 As shown, the input-side engaging portion 6a rotates in the direction of rotation of the input member 2a inside the input-side engaged portion 47a. Then, the radially inner side surface of the input-side engaging portion 6a presses the flat surface 61 of the input-side engaged portion 47a toward the radially inner side, and the engaging member 5a moves in the direction away from the pressed surface 24. Thus, the pressed surface 39 of the engaging member 5a moves away from the pressed surface 24. Consequently, the elastic member 50 elastically deforms in such a manner that the elastic pressing portion 59 constituting the elastic member 50 as a whole displaces to the radially outer side. Then, the pair of output-side engaged portions 40 sandwich the output-side engaging portion 13 of the output member 3 from both radially outer sides, and the output-side engaging portion 13 and the pair of output-side engaged portions 40 are engaged without shaking. As a result, the rotational torque input to the input member 2a is transmitted to the output member 3 via the pair of engaging members 5a, and is output from the output member 3.

[0182] In the reverse input cut-off clutch la of this example, each of the pair of engaging members 5a is constituted only by one main plate 36a, and does not have a link member and a swing support shaft, and thus the number of parts can be suppressed to be small. The other constitution and the action effect are the same as in the first example.

[0183] Further, the reverse input cut-off clutch of the present application can also be applied to the above-described conventional constitution reverse input cut-off clutch.

[0184] Conforming to the description

[0185] 1, 1a - reverse input cut clutch, 2, 2a - input member, 3 - output member, 4 - housing, 5, 5a - engaging member, 6, 6a - input side engaging portion, 7 - shaft member, 8 - input side engaging pin, 9 - input shaft portion, 10 - input arm portion, 11 - support hole, 12 - output shaft portion, 13 - output side engaging portion, 14 - side surface, 15 - guide surface, 16 - input side housing element, 17 - output side housing element, 18 - bolt, 19 - outer diameter side cylindrical portion, 20 - inner diameter side cylindrical portion, 21 - side plate portion, 22 - flange portion, 23 - through hole, 24 - pressed surface, 25 - input side socket fitting surface, 26 - input side bearing fitting surface, 27 - flange portion, 28 - inner diameter side cylindrical portion, 29 - side plate portion, 30 - output side socket fitting surface, 31 - threaded hole, 32 - mounting hole, 33 - output side bearing fitting surface, 34 - input side bearing, 35 - output side bearing, 36, 36a - main plate, 37 - link member, 38 - swing support shaft, 39 - pressed surface, 40 - output side engaged portion, 41 - swing support portion, 42 - bottom surface, 43 - guided surface, 44 - insertion hole, 45 - first protrusion, 46 - second protrusion, 47, 47a - input side engaged portion, 48 - swing supported portion, 49 - long hole, 50 - elastic member, 51 - support plate portion, 52 - pressed plate portion, 53 - link plate portion, 54 - first through hole, 55 - second through hole, 56 - reinforcing member, 57 - insertion hole, 58 - support hole, 59 - elastic pressed portion, 60 - base plate portion, 61 - flat surface, 101 - reverse input cut clutch, 102, 102z - input member, 103 - output member, 104 - pressed member, 105 - engaging member, 106 - input shaft portion, 107, 107z - input side engaging portion, 108 - output shaft portion, 109 - output side engaging portion, 110 - pressed surface, 111 - pressed surface, 112 - bottom surface, 113 - input side engaged portion, 114 - output side engaged portion.

Claims

1. A reverse input cut clutch characterized by, Possessing: a pressed member having a pressed surface on an inner peripheral surface; an input member having an input-side engaging portion disposed radially inward of the pressed surface and coaxially disposed with the pressed surface; an output member having an output-side engaging portion disposed radially inward of the input-side engaging portion and coaxially disposed with the pressed surface; and an engaging member having a pressing surface opposite the pressed surface, an input-side engaged portion capable of engaging with the input-side engaging portion, and an output-side engaged portion capable of engaging with the output-side engaging portion, and being capable of moving in a first direction, which is a direction of approach and departure with respect to the pressed surface, and being disposed radially inward of the pressed surface, in the case of the engaging member, when a rotational torque is input to the input member, the output-side engaged portion and the output-side engaging portion are caused to engage based on engagement of the input-side engaging portion and the input-side engaged portion, the rotational torque input to the input member is transmitted to the output member by displacing the output-side engaged portion and the output-side engaging portion away from the pressed surface, and when a reverse rotational torque is input to the output member, the output-side engaging portion and the output-side engaged portion are caused to engage, thereby pressing the pressing surface against the pressed surface and causing the pressing surface and the pressed surface to frictionally engage, an elastic member that presses the output-side engaging portion toward a side away from the pressed surface in the first direction and presses the engaging member toward a side close to the pressed surface in the first direction by being elastically sandwiched between the output-side engaging portion and the engaging member, the elastic member has an elastic pressing portion disposed at a position axially offset with respect to the output-side engaged portion in the axial direction of the pressed surface at a position overlapping the output-side engaging portion in the first direction, elastically presses the elastic pressing portion against the output-side engaging portion, and is constituted by a plate spring.

2. The reverse input cut clutch according to claim 1, wherein the elastic pressing portion is disposed at positions axially offset with respect to the output-side engaged portion to both sides in the axial direction of the pressed surface.

3. The reverse input cut clutch according to claim 1 or 2, wherein the elastic member is not fixed to either of the output member and the engaging member, and is elastically sandwiched between the output-side engaging portion and the engaging member.

4. The reverse input cut clutch according to claim 3, wherein the elastic member is caused to be restricted in displacement in a direction orthogonal to the first direction based on engagement with the engaging member.

5. The reverse input cut clutch according to any one of claims 1, 2, and 4, wherein the plate spring has a first through-hole that penetrates in the first direction at a position integrated with the output-side engaged portion, and the elastic pressing portion is disposed on both sides of the first through-hole in the axial direction of the pressed surface.

6. The reverse input cut clutch according to claim 5, wherein ​ The engaging member has a first protrusion inserted into the first through-hole, and displacement of the elastic member in the axial direction of the pressed surface and / or displacement of the elastic member in a second direction orthogonal to both the first direction and the axial direction of the pressed surface is restricted based on engagement of the first through-hole and the first protrusion inserted into the first through-hole.

7. The reverse input cut clutch according to claim 5, wherein the plate spring has a second through-hole that penetrates in the first direction at a portion where the first through-hole is separated in a second direction orthogonal to both the first direction and the axial direction of the pressed surface, the engaging member has a second protrusion inserted into the second through-hole, displacement of the elastic member in the axial direction of the pressed surface and / or displacement of the elastic member in the second direction is restricted based on engagement of the second through-hole and the second protrusion inserted into the second through-hole.

8. The reverse input cut clutch according to claim 6, wherein the plate spring has a second through-hole that penetrates in the first direction at a portion where the first through-hole is separated in a second direction orthogonal to both the first direction and the axial direction of the pressed surface, the engaging member has a second protrusion inserted into the second through-hole, displacement of the elastic member in the axial direction of the pressed surface and / or displacement of the elastic member in the second direction is restricted based on engagement of the second through-hole and the second protrusion inserted into the second through-hole.

9. The reverse input cut clutch according to any one of claims 1, 2, 4, 6 to 8, wherein the engaging member has only one main plate having the pressed surface and the output-side engaging portion.

10. The reverse input cut clutch according to claim 9, wherein the engaging member has the main plate and a link member arranged adjacent to the main plate in the axial direction of the main plate, the main plate has a swing support portion on the side closer to the pressed surface than the input-side engaging portion in the first direction, the link member has the input-side engaging portion and a swing-supported portion swingably supported by the swing support portion, in the engaging member, when a rotational torque is input to the input member, the swing-supported portion is pulled via the link member by the input-side engaging portion, thereby moving away from the pressed surface, and the output-side engaging portion is engaged with the output-side engaging portion, thereby transmitting the rotational torque input to the input member to the output member.

11. The reverse input cut clutch according to claim 10, wherein the link member is composed of a pair of link members arranged to sandwich the main plate from both axial sides.

12. The reverse input cut clutch according to claim 10 or 11, wherein the swing support portion is composed of a plate-side through-hole provided in the main plate, and the swing-supported portion is composed of a link-side through-hole provided in the link member, the engaging member has a swing support shaft inserted into the plate-side through-hole and the link-side through-hole.

13. The reverse input cut clutch according to any one of claims 1, 2, 4, 6 to 8, 10, 11, characterized in that the engaging member is composed of a pair of engaging members configured to sandwich the output side engaging portion from both radial sides, and the input side engaging portion of the input member is composed of a pair of input side engaging portions.

14. The reverse input cut clutch according to claim 13, characterized in that a reinforcing member is provided, which is interposed between the front end portions of the input side engaging portions that constitute the pair of input side engaging portions.

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