Selectable One-Way Clutch

Abstract

To provide a selectable one-way clutch having one selectable plate and using a general-purpose pawl member. [Solution] An accommodation space is formed in the outer ring of a selectable one-way clutch. A pawl member and a biasing mechanism are provided in the accommodation space. The selectable plate has a plate body. A window portion is formed in the plate body in which the pawl member and part of the biasing mechanism are disposed. The window portion has an inner edge portion. The inner edge portion has a small diameter portion disposed radially inward from the tooth portion, a large diameter portion disposed radially outward from the tooth portion, and a cam portion. When the small diameter portion is disposed radially inward of the pawl portion of the pawl member, the pawl portion engages with the tooth portion. When the inner edge portion disposed radially inward of the pawl portion switches from the small diameter portion to the large diameter portion, the pawl portion is lifted radially outward by the cam portion. When the large diameter portion is disposed radially inward of the pawl portion, the pawl portion is disposed radially outward from the tooth portion.

Description

[Technical Field]

[0001] The present disclosure relates to a selectable one-way clutch. [Background technology]

[0002] The selectable one-way clutch of Patent Document 1 listed below has an outer ring and an inner ring arranged to rotate relative to each other. A plurality of teeth are formed on the outer peripheral surface of the inner ring. A plurality of accommodation spaces are formed on the inner peripheral side of the outer ring. The accommodation spaces are open to the inner peripheral side of the outer ring and both axial sides. The accommodation spaces are provided with pawl members and a biasing mechanism that biases the pawl members radially inward. When the pawl members engage with the teeth, torque is transmitted from the inner ring to the outer ring.

[0003] Furthermore, the selectable one-way clutch of Patent Document 1 listed below is equipped with two selectable plates for separating the inner and outer rings. The two selectable plates are arranged on both axial sides of the outer ring. The selectable plates are attached to the outer ring so as to be rotatable relative to the outer ring. A window portion penetrating the selectable plate in the axial direction is formed. The pawl member is formed with two protrusions protruding on both axial sides. The protrusions are inserted into the window portion of the selectable plate. When the selectable plate rotates, the inner edge portion of the window portion located radially inside the protrusion lifts the protrusion radially outward. This lifts the tip of the pawl member, disengaging it from the tooth portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] U.S. Patent No. 8,042,669 Summary of the Invention [Problem to be solved by the invention]

[0005] However, according to Patent Document 1, two selectable plates are required, which increases the number of parts, and the claw members have protrusions, making it impossible to use general-purpose parts.

[0006] The present disclosure has been made in consideration of the above, and aims to provide a selectable one-way clutch that has one selectable plate and uses a general-purpose pawl member. [Means for solving the problem]

[0007] To achieve the above object, a selectable one-way clutch according to one aspect of the present disclosure includes an annular inner ring, an annular outer ring with the inner ring disposed on its inner periphery, and a selectable plate that separates the outer ring from the inner ring. The axial direction is a direction parallel to the rotation axis of the inner ring. A plurality of teeth are formed on the outer peripheral surface of the inner ring. The outer ring is formed with a housing space that opens radially inward and toward one side in the axial direction. The housing space is provided with a pawl member and a biasing mechanism that biases the pawl member toward the teeth. The selectable plate is disposed on one side of the outer ring in the axial direction and has an annular plate body that is rotatable relative to the outer ring. A portion of the pawl member and a portion of the biasing mechanism protrude from the housing space toward one side in the axial direction. The plate body is formed with a window that penetrates in the axial direction and in which a portion of the pawl member and a portion of the biasing mechanism are disposed. The window is disposed radially inward of the pawl member and has an inner edge that extends circumferentially. The inner edge portion has a small diameter portion arranged radially inward from the tooth portion, a large diameter portion arranged radially outward from the tooth portion, and a cam portion arranged between the small diameter portion and the large diameter portion. The claw member has a shaft portion rotatably supported by the outer ring and a claw portion protruding from the shaft portion. When the small diameter portion is arranged radially inward from the claw portion, the claw portion engages with the tooth portion. When the inner edge portion arranged radially inward from the claw portion switches from the small diameter portion to the large diameter portion, the claw portion is lifted radially outward by the cam portion. When the large diameter portion is arranged radially inward from the claw portion, the claw portion is arranged radially outward from the tooth portion. [Effects of the Invention]

[0008] The selectable one-way clutch of the present disclosure has only one selectable plate, reducing the number of parts. Furthermore, it is possible to use a general-purpose pawl member. As a result, the manufacture of the selectable one-way clutch is simplified. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view of a selectable one-way clutch according to a first embodiment. [Figure 2] FIG. 2 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate removed) viewed from a first direction. [Figure 3] FIG. 3 is an enlarged view of the housing space of FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line VI-VI in FIG. [Figure 5] FIG. 5 is a view of the selectable one-way clutch of the first embodiment as viewed from a first direction. [Figure 6] FIG. 6 is a view of the selectable one-way clutch of the first embodiment as viewed from a second direction. [Figure 7] FIG. 7 is a view of the selectable plate of the first embodiment as viewed from a first direction. [Figure 8] FIG. 8 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate and outer ring removed) viewed from a first direction. [Figure 9] FIG. 9 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate and outer ring removed) in one-way mode as viewed from the first direction. [Figure 10] FIG. 10 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate and outer ring removed) in the free mode as viewed from the first direction. [Figure 11] FIG. 11 is a view of the selectable one-way clutch of the second embodiment (with the first retaining plate removed) viewed from the first direction. [Figure 12] FIG. 12 is a view of the selectable plate of the second embodiment as viewed from a first direction. [Figure 13] FIG. 13 is a view of the selectable one-way clutch of the second embodiment (with the first retaining plate and outer ring removed) in the two-way lock mode as viewed from the first direction. [Figure 14]FIG. 14 is a view of the selectable one-way clutch of the second embodiment (with the first retaining plate and outer ring removed) in one-way mode as viewed from the first direction. [Figure 15] FIG. 15 is a view of the selectable one-way clutch of the second embodiment (with the first retaining plate and outer ring removed) in the free mode as viewed from the first direction. DETAILED DESCRIPTION OF THE INVENTION

[0010] The embodiments of the present disclosure will be described in detail with reference to the drawings. The present disclosure is not limited to the contents described below. Furthermore, the components described below include those that can be easily imagined by a person skilled in the art and those that are substantially the same. Furthermore, the components described below can be combined as appropriate.

[0011] (Embodiment 1) FIG. 1 is an exploded perspective view of a selectable one-way clutch according to a first embodiment. The selectable one-way clutch 100 is used, for example, in a vehicle drive system mounted on a vehicle. The vehicle drive system is a device that generates torque using a drive source such as an engine, transmits the torque to drive wheels, and rotates the drive wheels. In the vehicle drive system, the selectable one-way clutch 100 is disposed between an input shaft and an output shaft (not shown), and transmits or blocks torque from the input shaft to the output shaft. Note that the selectable one-way clutch 100 of the present disclosure may also be used in devices other than vehicle drive systems.

[0012] As shown in FIG. 1, the selectable one-way clutch 100 of embodiment 1 has an inner ring 1, an outer ring 10, a plurality of pawl members 30, a biasing mechanism 33, a selectable plate 40, two retaining plates (a first retaining plate 70 and a second retaining plate 80), and three bolts 90.

[0013] The selectable one-way clutch 100 will be described in detail below. The direction parallel to the rotation axis O1 of the inner ring 1 will be referred to as the axial direction. Furthermore, within the axial direction, the side toward which the outer ring 10 is disposed as viewed from the selectable plate 40 will be referred to as the first direction X1. The direction opposite to the first direction X1 will be referred to as the second direction X2. Additionally, the direction perpendicular to the rotation axis O1 will be referred to as the radial direction.

[0014] 2 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate removed) as viewed from a first direction. The rotation direction will be described based on the view from the first direction X1. When viewed from the first direction X1, the rotation direction is left-handed (counterclockwise), which is referred to as a first rotation direction L1. When viewed from the second direction X2, the rotation direction is right-handed (clockwise), which is referred to as a second rotation direction L2.

[0015] As shown in FIG. 2, the inner ring 1 is an annular component. An input shaft (not shown) of a vehicle drive device is inserted into the inner periphery of the inner ring 1. A plurality of female splines 2 are formed on the inner periphery of the inner ring 1. Therefore, the inner ring 1 is coupled to the input shaft so that they cannot rotate relative to each other. Furthermore, when the input shaft rotates, the inner ring 1 rotates around a rotation axis O1. A plurality of teeth 3 are formed on the outer periphery of the inner ring 1.

[0016] Fig. 3 is an enlarged view of the accommodation space of Fig. 2. As shown in Fig. 3, the tooth portion 3 has an engagement surface 4 that extends radially and faces the first rotation direction L1, and a ride-on surface 5 that is positioned radially inward as it moves from the radially outer end of the engagement surface 4 toward the second rotation direction L2.

[0017] As shown in Fig. 2, the outer ring 10 is an annular component. The outer ring 10 is connected to an output shaft (not shown) of a vehicle drive device and is supported so as not to rotate relative to the output shaft. The inner ring 1 is disposed on the inner periphery of the outer ring 10, and the outer ring 10 and the inner ring 1 are disposed coaxially. Three housing spaces 20 are formed on the inner periphery of the outer ring 10.

[0018] As shown in Figure 3, the accommodation space 20 has a shaft portion accommodation space 21 that is approximately circular when viewed from the axial direction, a claw portion accommodation space 22 that is arranged in the second rotation direction L2 relative to the shaft portion accommodation space 21, and a spring accommodation space 23 that is arranged radially outside the claw portion accommodation space 22.

[0019] The shaft portion 31 of the claw member 30 is accommodated in the shaft portion accommodating space 21. An opening 24 that opens inward in the second rotational direction L2 and radially inward is formed in the shaft portion accommodating space 21. This opening 24 connects the shaft portion accommodating space 21 and the claw portion accommodating space 22. The width of the opening 24 is H1.

[0020] The claw accommodating space 22 accommodates the claw 32 of the claw member 30. The claw accommodating space 22 opens radially inward from the inner circumferential surface 11 of the outer ring 10. The spring accommodating space 23 accommodates the biasing mechanism 33. The spring accommodating space 23 opens radially inward and is continuous with the claw accommodating space 22.

[0021] The claw member 30 has a shaft portion 31 and a claw portion 32 protruding from the shaft portion 31. The shaft portion 31 is circular when viewed in the axial direction. The shaft portion 31 is rotatably housed in the shaft portion accommodating space 21. Therefore, the claw member 30 rotates around the shaft portion 31. The outer diameter of the shaft portion 31 is larger than the width H1 of the opening 24. The shaft portion 31 does not fall off from the opening 24 into the claw portion accommodating space 22.

[0022] The biasing mechanism 33 has a spring (elastic body) 34 and a support portion 35. The support portion 35 is housed in the spring housing space 23. The spring 34 is disposed between the support portion 35 and the claw portion 32. The spring 34 is assembled in a state where its length is shorter than its natural length. Therefore, the spring 34 biases the claw portion 32 so that the tip of the claw portion 32 moves radially inward.

[0023] Fig. 4 is a cross-sectional view taken along line VI-VI in Fig. 3. As shown in Fig. 4, the support portion 35 has a hole 36 that opens radially inward. A part of the spring 34 is housed in the hole 36. This supports the spring 34 so that it does not move in the axial or circumferential directions.

[0024] 4, the outer ring 10 has a first end face 12 facing a first direction X1 and a second end face 13 facing a second direction X2. The accommodation space 20 penetrates the first end face 12 and the second end face 13. In other words, the accommodation space 20 is open not only radially inward but also on both sides in the axial direction (the first direction X1 and the second direction X2).

[0025] As shown in FIG. 4, two retaining plates (a first retaining plate 70 and a second retaining plate 80) are disposed on either side of the outer ring 10 in the axial direction.

[0026] 5 is a view of the selectable one-way clutch of the first embodiment as viewed from the first direction. The first retaining plate 70 is an annular component. The first retaining plate 70 is arranged in the first direction X1 of the outer ring 10. The first retaining plate 70 blocks the first direction X1 of the accommodation space 20. This prevents the pawl member 30 and the biasing mechanism 33 (the spring 34 and the support portion 35) from falling off in the first direction X1.

[0027] Fig. 6 is a view of the selectable one-way clutch of the first embodiment as viewed from the second direction. As shown in Fig. 6, the second retaining plate 80 is an annular component. The second retaining plate 80 is disposed in the second direction X2 of the outer ring 10. The second retaining plate 80 blocks the second direction X2 of the accommodation space 20. This prevents the pawl member 30 and the biasing mechanism 33 (the spring 34 and the support portion 35) from falling off in the second direction X2.

[0028] As shown in Fig. 6, three female threaded holes 82 are formed in the second retaining plate 80. The female threaded holes 82 pass through the second retaining plate 80 in the axial direction. As shown in Fig. 1, bolts 90 that pass through the first retaining plate 70 and the outer ring 10 are threadedly engaged with the female threaded holes 82. The heads of the bolts 90 tighten the first retaining plate 70 and the outer ring 10 toward the second retaining plate 80. This integrates the first retaining plate 70, the outer ring 10, and the second retaining plate 80.

[0029] As shown in Fig. 1, a rib 83 that protrudes in the first direction X1 is formed on a surface 81 of the second retaining plate 80 facing in the first direction X1. The rib 83 is formed in an arc shape along the outer peripheral edge of the surface 81 facing in the first direction X1. As shown in Fig. 4, the rib 83 abuts against the second end face 13 of the outer ring 10. Therefore, a plate accommodating space 84 is formed on the inner peripheral side of the rib 83 and between the surface 81 and the second end face 13. In addition, the second retaining plate 80 is formed with an opening 85 (see Fig. 1) that opens the plate accommodating space 84 radially outward.

[0030] 4, the axial size H2 of the accommodation space 20 (outer ring 10) is smaller than the axial size H3 of the claw member 30. The end of the claw member 30 in the second direction X2 protrudes from the accommodation space 20 in the second direction X2 and is disposed in the plate accommodation space 84. The axial size of the support portion 35 is equal to the axial size H3 of the claw member 30. Therefore, a portion of the support portion 35 is also disposed in the plate accommodation space 84.

[0031] FIG. 7 is a view of the selectable plate of embodiment 1 as viewed from a first direction. The selectable plate 40 is a component that separates the inner ring 1 and the outer ring 10. As shown in FIG. 7, the selectable plate 40 has an annular plate body 41 and a connecting portion 50 that extends radially outward from the plate body 41. The selectable plate 40 is formed in a flat plate shape. In other words, the plate body 41 and the connecting portion 50 are arranged on an imaginary plane that is perpendicular to the rotation axis O1. Therefore, when manufacturing the selectable plate 40, a step of bending a steel plate is not required, making manufacturing easier.

[0032] An outer peripheral edge 43 and an inner peripheral edge 44 of the plate body 41 are formed in a circular shape. The plate body 41 is formed with three window portions 42 that penetrate in the axial direction.

[0033] The window portion 42 has an inner edge portion 60 that is a part of the edge of the window portion 42. The inner edge portion 60 is located radially inside the window portion 42 and extends circumferentially. The inner edge portion 60 is a portion that regulates the movement of the claw member 30. The inner edge portion 60 has a small diameter portion 61, a large diameter portion 62 that is arranged in the first rotation direction L1 relative to the small diameter portion 61 and is arranged radially outward of the small diameter portion 61, and a cam portion 63 between the first small diameter portion and the first large diameter portion.

[0034] With regard to the radial positions of the small diameter portion 61 and the large diameter portion 62, the small diameter portion 61 is disposed radially inward of the tooth portion 3 (engagement surface 4 and ride-on surface 5) of the inner ring 1 (see FIG. 9). On the other hand, the large diameter portion 62 is disposed radially outward of the tooth portion 3 (engagement surface 4 and ride-on surface 5) of the inner ring 1 (see FIG. 9).

[0035] As shown in Fig. 4, the plate body 41 is disposed in the plate accommodating space 84. That is, the plate body 41 is disposed between the outer ring 10 and the second retaining plate 80. The diameter of the inner peripheral edge 44 of the plate body 41 is smaller than the outer diameter of the inner ring 1. The plate body 41 is disposed offset in the second direction X2 with respect to the inner ring 1.

[0036] 8 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate and outer ring removed) viewed from the first direction. The outer periphery of the plate body 41 is in slidable contact with the inner periphery of the rib 83. Therefore, the plate body 41 is rotatably supported by the second retaining plate 80.

[0037] As shown in Fig. 8, when viewed from the axial direction, the window portion 42 overlaps with the claw member 30 and the biasing mechanism 33 (the spring 34 and the support portion 35). As shown in Fig. 4, the end of the claw member 30 in the second direction X2 and the end of the support portion 35 in the second direction X2 are disposed in the window portion 42. The spring 34 is disposed only in the accommodation space 20.

[0038] As shown in FIG. 8 , the connection portion 50 passes through the opening 85 and is disposed radially outward of the rib 83. The connection portion 50 is coupled to a drive unit (not shown) of a vehicle drive device. Therefore, the circumferential position of the connection portion 50 is controlled by the drive unit. In this embodiment, the circumferential position of the connection portion 50 is controlled by the drive unit so that it is either the position shown in FIG. 8 or a position moved in the second rotation direction L2 from the position shown in FIG. 8 (see dashed line M50 in FIG. 8 ). Therefore, when the connection portion 50 is moved in the circumferential direction, the plate main body 41 rotates, and the circumferential position of the window portion 42 changes. Hereinafter, the case where the connection portion 50 is disposed in the position shown in FIG. 8 is referred to as one-way mode. On the other hand, the case where the connection portion 50 is in the position indicated by dashed line M50 in FIG. 8 is referred to as free mode.

[0039] Next, the circumferential position of the inner edge portion 60 in the one-way mode and the free mode will be described.

[0040] 9 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate and outer ring removed) in one-way mode, viewed from the first direction. As shown in FIG. 9, in one-way mode, the small diameter portion 61 of the inner edge portion 60 is positioned radially inward of the claw portion 32. Therefore, the tip of the claw portion 32 contacts the outer peripheral surface of the inner ring 1.

[0041] Here, when the inner ring 1 rotates in the first rotational direction L1, the tips of the claw portions 32 mesh with the engagement surfaces 4, and torque in the first rotational direction L1 is transmitted to the outer ring 10. This causes the outer ring 10 to rotate in the first rotational direction L1.

[0042] On the other hand, when the inner ring 1 rotates in the second rotational direction L2, the tips of the claw portions 32 ride up on the ride-on surfaces 5. Therefore, torque in the second rotational direction L2 is not transmitted from the inner ring 1 to the outer ring 10. Therefore, the outer ring 10 does not rotate.

[0043] FIG. 10 is a view of the selectable one-way clutch of the first embodiment (with the first retaining plate and outer ring removed) in the free mode, viewed from the first direction. When switching from the one-way mode to the free mode, the selectable plate 40 rotates in the second rotation direction L2. This causes the cam portion 63 to slide radially inward of the claw portion 32, lifting the claw portion 32 radially outward. Next, the large diameter portion 62 is positioned radially inward of the claw portion 32, maintaining the lifted state of the claw portion 32. This prevents the claw portion 32 from engaging with the engagement surface 4. In other words, even if the inner ring 1 rotates in the first rotation direction L1 and the second rotation direction L2, the outer ring 10 does not rotate.

[0044] As described above, the selectable one-way clutch 100 of the first embodiment has only one selectable plate 40, reducing the number of parts. Furthermore, the pawl member 30 of the first embodiment does not require a convex portion that protrudes in the axial direction, allowing the use of a general-purpose part. This simplifies the manufacture of the selectable one-way clutch 100.

[0045] Next, a selectable one-way clutch 100A according to the second embodiment will be described. The following description will focus on the differences from the first embodiment.

[0046] (Embodiment 2) Fig. 11 is a view of the selectable one-way clutch of embodiment 2 (with the first retaining plate removed) viewed from the first direction. As shown in Fig. 11, the inner ring 1A of the selectable one-way clutch 100A of embodiment 2 differs from embodiment 1 in the shape of the tooth portion 3A. The tooth portion 3A of embodiment 2 has a first engagement surface 4A facing the first rotational direction L1 and a second engagement surface 4B facing the second rotational direction L2 (see Figs. 14 and 15).

[0047] The outer ring 10A of embodiment 2 also differs from embodiment 1 in that a first accommodating space 20A and a second accommodating space 20B are formed therein. The first accommodating space 20A has the same shape as the accommodating space 20 of embodiment 1. The second accommodating space 20B is formed symmetrically to the first accommodating space 20A with respect to an imaginary line W1 (see FIG. 11) that extends radially from the rotation axis O1 and passes between the second accommodating space 20B and the first accommodating space 20A.

[0048] The selectable one-way clutch 100A of the second embodiment differs from that of the first embodiment in that it has a first pawl member 30A that meshes with the first engagement surface 4A and a second pawl member 30B that meshes with the second engagement surface 4B. The first pawl member 30A and the second pawl member 30B have the same shape as the pawl member 30 of the first embodiment. The second pawl member 30B is disposed in the second housing space 20B so as to be symmetrical to the first pawl member 30A with respect to the imaginary line W1 (see FIG. 11).

[0049] The selectable one-way clutch 100A of the second embodiment also differs from that of the first embodiment in that it includes a first biasing mechanism 33A (spring 34A, support portion 35A) and a second biasing mechanism 33B (spring 34B, support portion 35B). The first biasing mechanism 33A and the second biasing mechanism 33B have the same structure as the biasing mechanism 33 of the first embodiment. The second biasing mechanism 33B is disposed in the second housing space 20B so as to be symmetrical to the first biasing mechanism 33A with respect to the imaginary line W1 (see FIG. 11).

[0050] Fig. 12 is a view of the selectable plate of embodiment 2 as viewed from a first direction. As shown in Fig. 12, the selectable plate 40A of embodiment 2 differs from embodiment 1 in that a first window portion 42A and a second window portion 42B are formed. A part of the first claw member 30A and a part of the first biasing mechanism 33A are disposed in the first window portion 42A (see Figs. 13 to 15). A part of the second claw member 30B and a part of the second biasing mechanism 33B are disposed in the second window portion 42B (see Figs. 13 to 15).

[0051] The first inner edge portion 60A of the first window portion 42A has, similar to the window portion 42 of embodiment 1, a first small diameter portion 61A, a first large diameter portion 62A that is arranged in the first rotational direction L1 relative to the first small diameter portion 61A and radially outward from the first small diameter portion 61A, and a first cam portion 63A between the first small diameter portion 61A and the first large diameter portion 62A.

[0052] The first inner edge portion 60B of the second window portion 42B has a second small diameter portion 61B, a second large diameter portion 62B that is arranged in the first rotational direction L1 relative to the second small diameter portion 61B and radially outward from the second small diameter portion 61B, and a second cam portion 63B that is arranged between the second small diameter portion 61B and the second large diameter portion 62B.

[0053] The radial position of the second small diameter portion 61B is the same as that of the first small diameter portion 61A. In other words, the second small diameter portion 61B is located radially inward of the tooth portion 3A (first engagement surface 4A and second engagement surface 4B) of the inner ring 1A. The second large diameter portion 62B is the same as that of the first large diameter portion 62A. In other words, it is located radially outward of the tooth portion 3A (first engagement surface 4A and second engagement surface 4B) of the inner ring 1A. The second cam portion 63B is inclined so as to be located in the first rotation direction L1 as it moves radially outward.

[0054] The connection part 50 of the second embodiment is connected to a drive part (not shown) and the circumferential position thereof is controlled by the drive part, which is the same as that of the first embodiment. However, the connection part 50 of the second embodiment differs from that of the first embodiment in that there are three circumferential positions of the connection part 50, namely, the position shown in Fig. 13, the position shown in Fig. 14, and the position shown in Fig. 15.

[0055] 13 is a view of the selectable one-way clutch of the second embodiment (with the first retaining plate and outer ring removed) in the two-way lock mode as viewed from the first direction. As shown in FIG. 13, the connecting part 50 may be positioned closer to the end of the opening 85 in the first rotation direction L1. Hereinafter, the state in which the connecting part 50 is positioned as shown in FIG. 13 will be referred to as the two-way lock mode.

[0056] In the bidirectional locking mode, the first small diameter portion 61A is disposed in the first window portion 42A radially inward of the claw portion 32A of the first claw member 30A. Therefore, the claw portion 32A of the first claw member 30A meshes with the first engagement surface 4A of the inner ring 1A. In addition, in the second window portion 42B, the second small diameter portion 61B is disposed radially inward of the claw portion 32B of the second claw member 30B. Therefore, the claw portion 32B of the second claw member 30B meshes with the second engagement surface 4B of the inner ring 1A. From the above, in the bidirectional locking mode, torque in both rotational directions (first rotational direction L1 and second rotational direction L2) is transmitted from the inner ring 1A to the outer ring 10A.

[0057] Figure 14 is a view of the selectable one-way clutch of embodiment 2 (with the first retaining plate and outer ring removed) in one-way mode as viewed from the first direction. As shown in Figure 14, the connecting part 50 may be located in the circumferential center of the opening 85. Hereinafter, the state in which the connecting part 50 is located in the position shown in Figure 14 will be referred to as one-way mode. When the selectable plate 40B rotates in the second rotation direction L2 from the two-way lock mode, the clutch switches to the one-way mode.

[0058] In the one-way mode, the first small diameter portion 61A is disposed radially inward of the claw portion 32A of the first claw member 30A. Therefore, the claw portion 32A of the first claw member 30A engages with the first engagement surface 4A of the inner ring 1A. On the other hand, when the bidirectional lock mode is switched to the one-way mode, the second cam portion 63B lifts the claw portion 32B of the second claw member 30B radially outward. Then, the second large diameter portion 62B is disposed radially inward of the claw portion 32B of the second claw member 30B. This maintains the lifted state of the claw portion 32B, and the claw portion 32B does not engage with the second engagement surface 4B.

[0059] As described above, in one-way mode, torque is transmitted in the first rotation direction L1 from the inner ring 1A to the outer ring 10A. However, even if the inner ring 1A rotates in the second rotation direction L2, torque is not transmitted to the outer ring 10A, and the inner ring 1A spins freely.

[0060] Figure 15 is a view of the selectable one-way clutch of embodiment 2 (with the first retaining plate and outer ring removed) in free mode as viewed from the first direction. As shown in Figure 15, the connection part 50 may be positioned near the end of the opening 85 in the second rotational direction L2. Hereinafter, the state in which the connection part 50 is positioned as shown in Figure 15 will be referred to as free mode. When the selectable plate 40B rotates in the second rotational direction L2 from the one-way mode, the clutch switches to free mode.

[0061] When switching from one-way mode to free mode, the first cam portion 63A of the first window portion 42A lifts the claw portion 32 of the first claw member 30A radially outward. The first large diameter portion 62A is disposed radially inward of the claw portion 32A of the first claw member 30A. Therefore, the claw portion 32A of the first claw member 30A does not engage with the first engagement surface 4A. Similarly to the one-way mode, the second large diameter portion 62B is disposed radially inward of the claw portion 32B of the second claw member 30B. Therefore, the claw portion 32B does not engage with the second engagement surface 4B.

[0062] As described above, in the free mode, even if the inner race 1A rotates in the first rotation direction L1 and the second rotation direction L2, torque is not transmitted to the outer race 10A, and the inner race 1A spins freely.

[0063] According to the selectable one-way clutch 100A of the above-described embodiment 2, as in embodiment 1, there is only one selectable plate 40A, thereby reducing the number of parts. Furthermore, the pawl members (first pawl member 30A, second pawl member 30B) of embodiment 2 can also be general-purpose products. This simplifies the manufacture of the selectable one-way clutch 100A.

[0064] Although the embodiments have been described above, the present disclosure is not limited to the examples described in the embodiments. For example, with respect to a part of the biasing mechanism 33 housed in the window portion 42, in the embodiment, a part of the support portion 35 is housed in the window portion 42, but in the present disclosure, not only a part of the support portion 35 but also a part of the spring (elastic body) 34 may be housed in the window portion 42.

[0065] Furthermore, although the biasing mechanism 33 of this embodiment includes the spring (elastic body) 34 and the support portion 35, the biasing mechanism 33 of the present disclosure may include only the spring (elastic body) 34. When the biasing mechanism 33 is configured only with the spring (elastic body) 34, the part of the biasing mechanism 33 housed in the window portion 42 becomes part of the spring (elastic body) 34.

[0066] Furthermore, although the plate body 41 and the connection portion 50 in the embodiment are arranged on a virtual plane perpendicular to the rotation axis O1, the present disclosure does not require the plate body 41 and the connection portion 50 to be arranged on a virtual plane perpendicular to the rotation axis O1.

[0067] Furthermore, although the housing space 20 of the outer ring 10 in the embodiment is open on both axial sides, in the present disclosure it is sufficient that at least one axial side (the second direction X2) where the selectable plate 40 is arranged is open. In other words, the present disclosure may also be an outer ring 10 in which the housing space 20 is closed in the first direction X1. With this outer ring 10, the first retaining plate 70 is not necessary.

[0068] The present disclosure may also be implemented as a combination of the following configurations. (1) an inner ring formed in an annular shape; an outer ring formed in an annular shape and having the inner ring disposed on its inner circumferential side; a selectable plate that separates the outer ring and the inner ring; Equipped with a direction parallel to the rotation axis of the inner ring is defined as an axial direction, a plurality of teeth are formed on the outer peripheral surface of the inner ring, The outer ring has an accommodation space formed therein, the accommodation space being open to a radially inner side and to one side in the axial direction, The accommodation space is provided with a pawl member and a biasing mechanism that biases the pawl member toward the tooth portion, the selectable plate is disposed on one side of the outer ring in the axial direction and has an annular plate body that is rotatable relative to the outer ring, a portion of the pawl member and a portion of the biasing mechanism protrude from the accommodation space in one direction in the axial direction; a window portion is formed in the plate body, the window portion penetrating the plate body in the axial direction and in which a part of the pawl member and a part of the biasing mechanism are disposed; the window portion is disposed radially inward of the claw member and has an inner edge portion extending in a circumferential direction, The inner edge portion is a small diameter portion disposed radially inward of the tooth portion; a large diameter portion disposed radially outward of the tooth portion; a cam portion disposed between the small diameter portion and the large diameter portion; and The claw member is a shaft portion rotatably supported by the outer ring; a claw portion protruding from the shaft portion; and When the small diameter portion is disposed radially inside the claw portion, the claw portion engages with the tooth portion, When the inner edge portion disposed radially inside the claw portion switches from the small diameter portion to the large diameter portion, the claw portion is lifted radially outward by the cam portion, When the large diameter portion is disposed radially inward of the claw portion, the claw portion is disposed radially outward of the tooth portion. Selectable one-way clutch. (2) the selectable plate has a connection portion that extends radially outward from the plate body and protrudes radially outward beyond an outer peripheral surface of the outer ring, The connecting portion and the plate body are disposed on an imaginary plane perpendicular to the rotation axis. (1) A selectable one-way clutch as described above. (3) The biasing mechanism has an elastic body and a support portion that supports the elastic body. A selectable one-way clutch according to (1) or (2). (4) The part of the biasing mechanism that protrudes from the accommodation space in one axial direction is a part of the elastic body and a part of the support part. (3) A selectable one-way clutch according to the above. (5) The part of the biasing mechanism that protrudes from the accommodation space in one axial direction is only a part of the support portion. (3) A selectable one-way clutch according to the above. (6) The biasing mechanism has only an elastic body. A selectable one-way clutch according to (1) or (2). (7) a retaining plate disposed on one side of the outer ring in the axial direction to prevent the pawl member and the biasing mechanism from falling off; (1) A selectable one-way clutch as described above. (8) The accommodation space is also open to the other side in the axial direction. (1) A selectable one-way clutch as described above. (9) The outer ring has two retaining plates disposed on both sides in the axial direction to prevent the pawl members and the biasing mechanism from falling off. (8) A selectable one-way clutch according to the present invention. (10) The pawl members include only first pawl members that transmit torque in a first rotational direction from the inner ring to the outer ring. A selectable one-way clutch according to any one of (1) to (9). (11) the window portion has only a first window portion in which the first claw member is disposed, The first inner edge portion, which is the inner edge portion of the first window portion, a first small diameter portion that is the small diameter portion; a first large diameter portion that is the large diameter portion and is disposed in the first rotation direction relative to the first small diameter portion; a first cam portion that is the cam portion; have (10) A selectable one-way clutch according to (10). (12) The claw member is a first pawl member that transmits torque in a first rotational direction from the inner ring to the outer ring; a second pawl member that transmits torque in a second rotational direction from the inner ring to the outer ring; have A selectable one-way clutch according to any one of (1) to (9). (13) The window portion is a first window portion in which the first claw member is disposed; a second window portion in which the second claw member is disposed; and The first inner edge portion, which is the inner edge portion of the first window portion, a first small diameter portion that is a small diameter portion; a first large diameter portion that is the large diameter portion and is disposed in the first rotation direction relative to the first small diameter portion; a first cam portion that is the cam portion; and The second inner edge portion, which is the inner edge portion of the second window portion, a second small diameter portion that is the small diameter portion; a second large diameter portion that is the large diameter portion and is disposed in the first rotation direction relative to the second small diameter portion; a second cam portion that is the cam portion and is disposed gradually in the first rotation direction toward the radially outer side; have (12) A selectable one-way clutch according to (12). [Explanation of symbols]

[0069] 1, 1A inner ring 3, 3A tooth part 4 (4A, 4B) Engagement surface (1st engagement surface, 2nd engagement surface) 10, 10A outer ring 20 (20A, 20B) Housing space (first housing space, second housing space) 21 Shaft storage space 22 Claw storage space 23 Spring storage space 24, 85 opening 30 (30A, 30B) Claw members (first claw member, second claw member) 31 Shaft 32, 32A, 32B claw part 33 (33A, 33B) Biasing mechanism (first biasing mechanism, second biasing mechanism) 34, 34A, 34B springs 35, 35A, 35B Support part 36 holes 40, 40A, 40B selectable plate 41 Plate body 42 (42A, 42B) Window portion (first window portion, second window portion) 43 Outer edge 44 inner periphery 50 Connection 60 (60A, 60B) Inner edge portion (first inner edge portion, second inner edge portion) 61 (61A, 62A) Small diameter section (first small diameter section, first large diameter section) 62 (62A, 62B) Large diameter section (first large diameter section, second large diameter section) 63 (63A, 63B) Cam portion (first cam portion, second cam portion) 70, 80 retaining plate 84 Plate storage space 90 volts 100, 100A selectable one-way clutch

Claims

1. an inner ring formed in an annular shape; an outer ring formed in an annular shape and having the inner ring disposed on its inner circumferential side; a selectable plate that separates the outer ring and the inner ring; Equipped with a direction parallel to the rotation axis of the inner ring is defined as an axial direction, a plurality of teeth are formed on the outer peripheral surface of the inner ring, The outer ring has an accommodation space formed therein, the accommodation space being open to a radially inner side and to one side in the axial direction, The accommodation space is provided with a pawl member and a biasing mechanism that biases the pawl member toward the tooth portion, the selectable plate is disposed on one side of the outer ring in the axial direction and has an annular plate body that is rotatable relative to the outer ring, a portion of the pawl member and a portion of the biasing mechanism protrude from the accommodation space in one direction in the axial direction; a window portion is formed in the plate body, the window portion penetrating the plate body in the axial direction and in which a part of the pawl member and a part of the biasing mechanism are disposed; the window portion is disposed radially inward of the claw member and has an inner edge portion extending in a circumferential direction, The inner edge portion is a small diameter portion disposed radially inward of the tooth portion; a large diameter portion disposed radially outward of the tooth portion; a cam portion disposed between the small diameter portion and the large diameter portion; and The claw member is a shaft portion rotatably supported by the outer ring; a claw portion protruding from the shaft portion; and When the small diameter portion is disposed radially inside the claw portion, the claw portion engages with the tooth portion, When the inner edge portion disposed radially inside the claw portion switches from the small diameter portion to the large diameter portion, the claw portion is lifted radially outward by the cam portion, When the large diameter portion is disposed radially inside the claw portion, the claw portion is disposed radially outside the tooth portion, The biasing mechanism includes an elastic body and a support portion that supports the elastic body so that the elastic body does not move in the axial direction and the circumferential direction. Selectable one-way clutch.

2. the selectable plate has a connection portion that extends radially outward from the plate body and protrudes radially outward beyond an outer peripheral surface of the outer ring, The connecting portion and the plate body are disposed on an imaginary plane perpendicular to the rotation axis.

2. The selectable one-way clutch according to claim 1.

3. The part of the biasing mechanism that protrudes from the accommodation space in one axial direction is a part of the elastic body and a part of the support part.

2. The selectable one-way clutch according to claim 1.

4. a portion of the biasing mechanism that protrudes from the accommodation space in one axial direction is only a portion of the support portion, The elastic body is disposed only in the accommodation space.

2. The selectable one-way clutch according to claim 1.

5. a retaining plate disposed on one side of the outer ring in the axial direction to prevent the pawl member and the biasing mechanism from falling off; 2. The selectable one-way clutch according to claim 1.

6. The accommodation space is also open to the other side in the axial direction.

2. The selectable one-way clutch according to claim 1.

7. The outer ring has two retaining plates disposed on both sides in the axial direction to prevent the pawl members and the biasing mechanism from falling off.

7. The selectable one-way clutch according to claim 6.

8. The pawl members include only first pawl members that transmit torque in a first rotational direction from the inner ring to the outer ring.

3. A selectable one-way clutch according to claim 1 or 2.

9. the window portion has only a first window portion in which the first claw member is disposed, The first inner edge portion is an inner edge portion of the first window portion. a first small diameter portion that is the small diameter portion; a first large diameter portion that is the large diameter portion and is disposed in the first rotational direction relative to the first small diameter portion; a first cam portion that is the cam portion; have 9. The selectable one-way clutch according to claim 8.

10. The claw member is a first pawl member that transmits torque in a first rotational direction from the inner ring to the outer ring; a second pawl member that transmits torque in a second rotational direction from the inner ring to the outer ring; have 3. A selectable one-way clutch according to claim 1 or 2.

11. The window portion is a first window portion in which the first claw member is disposed; a second window portion in which the second claw member is disposed; and The first inner edge portion is an inner edge portion of the first window portion. a first small diameter portion that is the small diameter portion; a first large diameter portion that is the large diameter portion and is disposed in the first rotational direction relative to the first small diameter portion; a first cam portion that is the cam portion; and The second inner edge portion is an inner edge portion of the second window portion. a second small diameter portion that is the small diameter portion; a second large diameter portion that is the large diameter portion and is disposed in the first rotation direction relative to the second small diameter portion; a second cam portion that is the cam portion and is disposed gradually in the first rotation direction toward the radially outer side; have 11. The selectable one-way clutch according to claim 10.

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