Selectable One-Way Clutch
The selectable one-way clutch design addresses the issue of axial enlargement by positioning the power transmission and shift drum components parallel to the rotation axis, resulting in a compact and efficient torque transmission mechanism.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- NSK WARNER
- Filing Date
- 2024-12-17
- Publication Date
- 2026-06-29
AI Technical Summary
Existing technologies fail to provide a selectable one-way clutch that can be miniaturized in the axial direction, leading to increased size and complexity in applications requiring compact designs.
A selectable one-way clutch design with a first inner ring, a first outer ring, a shift drum, and a first selectable plate, where the power transmission section and shift drum are positioned in a direction parallel to the rotation axis, allowing for a compact axial layout by integrating the connecting mechanism to a linear motion mechanism.
The design achieves miniaturization of the selectable one-way clutch in the axial direction, reducing the overall size and complexity while maintaining effective torque transmission and disengagement functionality.
Smart Images
Figure 2026106141000001_ABST
Abstract
Description
Technical Field
[0005]
[0001] The present disclosure relates to a selectable one-way clutch.
Background Art
[0002] A selectable one-way clutch has an inner ring and an outer ring that are relatively rotatable. A plurality of tooth portions are formed on one of the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. Also, a plurality of claw members are provided on the other of the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. When the claw members engage with the tooth portions, the inner ring and the outer ring rotate together. Further, in a selectable one-way clutch, in order to disengage the inner ring and the outer ring, for example, as shown in Patent Document 1, an annular selectable plate is provided.
[0003] Explaining the details of the selectable plate of Patent Document 1 below, it includes a plate body disposed on one side in the axial direction with respect to the inner ring, a cam portion extending in the other axial direction from the radially outer end portion of the plate body, and a power transmission portion extending in the one axial direction from the radially inner end portion of the plate body. The selectable plate is disposed so as to be axially movable. The power transmission portion is connected to a linear motion mechanism. Therefore, an axial load for axially moving the selectable plate is transmitted to the power transmission portion. When the linear motion mechanism operates and the selectable plate moves in the other axial direction, the cam portion lifts the claw members. Thereby, the engagement between the claw members and the tooth portions is released.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] Incidentally, the power transmission section of the selectable plate described in Patent Document 1 extends from the plate body in one axial direction (opposite to the cam section). As a result, the selectable one-way clutch is enlarged in the axial direction.
[0006] This disclosure has been made in view of the above, and aims to provide a selectable one-way clutch that can be miniaturized in the axial direction. [Means for solving the problem]
[0007] To achieve the above objective, a selectable one-way clutch according to one aspect of the present disclosure comprises: a first inner ring formed in an annular shape; a first outer ring formed in an annular shape with the first inner ring disposed inside it; a shift drum formed in an annular shape with the first inner ring and the first outer ring disposed inside it; and a first selectable plate for disengaging the first inner ring and the first outer ring. The direction parallel to the rotation axis of the first inner ring is defined as the axial direction. One of the axial directions is defined as the first direction. The other of the axial directions is defined as the second direction. A plurality of first teeth are formed on one of the outer circumferential surfaces of the first inner ring and the inner circumferential surface of the first outer ring. A tiltable first claw member and a first biasing member that biases the first claw member toward the first teeth are provided on the other of the outer circumferential surfaces of the first inner ring and the first outer ring. The first selectable plate has an annular plate body positioned in the first direction relative to the first outer ring, and a first cam portion extending in the second direction from the radially inner end of the plate body, which lifts the first claw member against the biasing force of the first biasing member. The radially outer end of the plate body is a first power transmission portion that protrudes radially outward from the outer circumferential surface of the first outer ring. A connecting portion for connecting to a linear motion mechanism is formed on the outer circumferential surface of the shift drum. The side surface of the shift drum facing the first direction is a first pressing surface facing the first power transmission portion in the axial direction. When the shift drum moves in the first direction, the first power transmission portion is pressed in the first direction, and the lifting of the first claw member by the first cam portion is released. [Effects of the Invention]
[0008] According to the selectable one-way clutch of this disclosure, the parts for connecting to the linear motion mechanism (first power transmission section and shift drum) are positioned in a second direction relative to the plate body, and are miniaturized. [Brief explanation of the drawing]
[0009] [Figure 1] Figure 1 is a cross-sectional view of the selectable one-way clutch of Embodiment 1, cut along the central axis. [Figure 2] Figure 2 is a side view of the selectable one-way clutch of Embodiment 1, with the hub removed, as seen from a second direction. [Figure 3] Figure 3 is a perspective view of the first outer ring body and hub of Embodiment 1, viewed from a second direction. [Figure 4] Figure 4 is a perspective view of the first retainer of Embodiment 1, viewed from a first direction. [Figure 5] Figure 5 is a cross-sectional view of the first claw member of Embodiment 1, cut in a direction perpendicular to the central axis, and more specifically, a cross-sectional view taken along the VV line in Figure 9. [Figure 6] Figure 6 is a cross-sectional view of the hub fixing hole of Embodiment 1 when cut in the axial direction, and more specifically, a cross-sectional view when cut along the line VI-VI in Figure 2. [Figure 7] Figure 7 is a perspective view of the first selectable plate of Embodiment 1, viewed from a second direction. [Figure 8] Figure 8 is a cross-sectional view of the spring hole for the selectable plate of Embodiment 1 when cut in the axial direction, and more specifically, a cross-sectional view taken along the line VIII-VIII in Figure 2. [Figure 9] Figure 9 is a cross-sectional view of the selectable one-way clutch of Embodiment 1 in the torque cut-off state, and more specifically, it is a cross-sectional view taken along the line IX-IX in Figure 2. [Figure 10] Figure 10 is a cross-sectional view of the torque transmission state of the selectable one-way clutch of Embodiment 1. [Figure 11]Figure 11 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut along the central axis. [Figure 12] Figure 12 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut axially along the rivet. [Figure 13] Figure 13 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut axially along the first pin. [Figure 14] Figure 14 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut axially along the fourth pin. [Figure 15] Figure 15 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, when the claw portions of the first claw member and the second claw member are cut axially so that they overlap. [Figure 16] Figure 16 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, showing the state in which torque is transmitted between the first inner ring and the first outer ring. [Figure 17] Figure 17 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, showing the state in which torque is transmitted between the second inner ring and the second outer ring. [Modes for carrying out the invention]
[0010] The forms for implementing this disclosure will be described in detail with reference to the drawings. This disclosure is not limited by the contents described below. Furthermore, the components described below include those that are readily conceivable to a person skilled in the art, and those that are substantially the same. In addition, the components described below can be combined as appropriate.
[0011] (Embodiment 1) FIG. 1 is a cross-sectional view of the selectable one-way clutch of Embodiment 1 cut along the central axis. The selectable one-way clutch 100 is a device that is arranged on the torque transmission path and transmits or blocks torque. Such a selectable one-way clutch 100 is used, for example, in a vehicle drive device mounted on a vehicle. The vehicle drive device is a device that generates torque with a drive source such as an engine, transmits the torque to the drive wheels, and rotates the drive wheels. Note that the selectable one-way clutch 100 of the present disclosure may be used in a device other than the vehicle drive device.
[0012] As shown in FIG. 1, in the present embodiment, a selectable one-way clutch 100 is interposed between the input shaft 101 and the output shaft 102. The input shaft 101 is a cylindrical component. The output shaft 102 is arranged coaxially with the input shaft 101. Also, a part of the output shaft 102 is arranged inside the input shaft 101.
[0013] The selectable one-way clutch 100 of Embodiment 1 includes a first inner ring 1, a first outer ring 10, a hub 50 arranged inside the first inner ring 1, a first selectable plate 60 that separates the first inner ring 1 and the first outer ring 10, and a shift drum 80 arranged outside the first outer ring 10.
[0014] Hereinafter, the details of the selectable one-way clutch 100 will be described. The direction parallel to the central axis O of the first inner ring 1 is referred to as the axial direction. Among the axial directions, the side on which the first selectable plate 60 is arranged as viewed from the first outer ring 10 is referred to as the first direction X1. The direction opposite to the first direction X1 is referred to as the second direction X2. The direction orthogonal to the central axis O is referred to as the radial direction.
[0015] Figure 2 is a side view of the selectable one-way clutch of Embodiment 1 with the hub removed, viewed from a second direction. The rotation direction will be explained based on the view from the second direction X2. When viewed from the second direction X2, if the rotation direction is counterclockwise, it will be referred to as the first rotation direction L1. When viewed from the second direction X2, if the rotation direction is clockwise, it will be referred to as the second rotation direction L2.
[0016] As shown in Figure 2, the first inner ring 1 is an annular component. The input shaft 101 (see Figure 1) is inserted inside the first inner ring 1. Multiple female splines 2 are formed on the inner circumferential surface of the first inner ring 1. Therefore, the first inner ring 1 and the input shaft 101 are spline-fitted. Furthermore, when the input shaft 101 rotates, the first inner ring 1 rotates around the central axis O.
[0017] Multiple first teeth 3 are formed on the outer circumference of the first inner ring 1, projecting radially outward. These multiple first teeth 3 are arranged at equal intervals in the circumferential direction. Furthermore, as shown in Figure 1, these multiple first teeth 3 are formed only on the end of the outer circumferential surface 4 of the first inner ring 1 in the second direction X2.
[0018] As shown in Figure 2, the first outer ring 10 comprises a first outer ring body 11, a first retainer 30, a first claw member 40, and a first coil spring 41 (see Figure 5, etc.).
[0019] Figure 3 is a perspective view of the first outer ring body and hub of Embodiment 1, viewed obliquely from a second direction. As shown in Figure 3, the first outer ring body 11 is an annular component and is arranged coaxially with the first inner ring 1. The first outer ring body 11 has six outer ring fixing holes 12 and three outer ring spring holes 13. The outer ring fixing holes 12 and the outer ring spring holes 13 each penetrate the first outer ring body 11 in the axial direction. The first outer ring body 11 also has a first side surface 14 (see Figure 1) facing a first direction X1 and a second side surface 15 facing a second direction X2.
[0020] The second side surface 15 of the first outer ring body 11 has a positioning projection 16 that protrudes in the second direction X2 and an annular fitting portion 17. The positioning projection 16 is elongated in the circumferential direction.
[0021] The fitting portion 17 extends circumferentially along the radially outer edge of the second side surface 15 and is formed in an annular shape. On the inner circumference side of the fitting portion 17, there are a plurality of first triangular portions 18 and three first trapezoidal portions 19 that project radially inward.
[0022] The first triangular section 18 gradually narrows in the circumferential direction toward the radially inward direction, and is roughly triangular when viewed from the axial direction. The first trapezoidal section 19 has a larger circumferential width than the first triangular section 18, and is roughly trapezoidal when viewed from the axial direction.
[0023] First triangular sections 18 are positioned on both sides of the first trapezoidal section 19 in the circumferential direction. The distance between the first trapezoidal section 19 and the first triangular section 18 positioned in the second rotational direction L2 is greater than the distance between the first trapezoidal section 19 and the first triangular section 18 positioned in the second rotational direction L2. Therefore, a first valley section 20 with a large circumferential distance is formed in the first rotational direction L1 of the first trapezoidal section 19.
[0024] Three protrusions 21 projecting radially outward are formed on the outer circumferential surface 11a of the first outer ring body 11. The three protrusions 21 are arranged at 120° intervals. A claw member housing portion 22 and a retainer housing portion 23 are formed on the inner circumferential side of the first outer ring body 11. The claw member housing portion 22 and the retainer housing portion 23 are cut out from the inner circumferential portion of the first outer ring body 11 and are open on both the radially inward and axial sides.
[0025] As shown in Figure 1, the first retainer 30 is a ring-shaped component formed around a central axis O, and its cross-section when cut in the axial direction is L-shaped. The first retainer 30 has a main body portion 31 positioned radially inward of the first outer ring 10 and a side wall 32 positioned in a second direction X2 of the first outer ring 10.
[0026] Figure 4 is a perspective view of the first retainer of Embodiment 1, viewed from a first direction. As shown in Figure 4, six elongated holes 33 extending in the circumferential direction are formed in the side wall 32. Positioning projections 16 of the first outer ring body 11 are fitted into these elongated holes 33 (see Figure 2).
[0027] Furthermore, the side wall 32 has six retainer fixing holes 34 and three retainer spring holes 35. The retainer fixing holes 34 overlap axially with the outer ring fixing holes 12 of the first outer ring body 11 (see Figure 6). The retainer spring holes 35 overlap axially with the outer ring spring holes 13 of the first outer ring body 11 (see Figure 8). Three spring retaining portions 36 that protrude radially outward are formed on the outer circumferential surface of the main body portion 31.
[0028] Figure 5 is a cross-sectional view of the first claw member of Embodiment 1, cut in a direction perpendicular to the central axis, and more specifically, a cross-sectional view taken along the VV line in Figure 9. As shown in Figure 5, the spring retaining portion 36 is located in the retainer housing portion 23 of the first outer ring body 11. A through hole 37 is formed in the spring retaining portion 36, penetrating in the radial direction. The first coil spring 41 is located in this through hole 37.
[0029] The main body portion 31 extends along the inner circumferential surface of the first outer ring body 11. The main body portion 31 closes the radially inner side of the claw member housing portion 22. An opening 38 is formed between the main body portion 31 and the spring retaining portion 36. The distance between the main body portion 31 and the spring retaining portion 36 is H1.
[0030] As shown in Figure 4, a closing wall 38a is provided in the first direction X1 of the opening 38 to close the opening 38. On the other hand, the first retainer 30 has a notch 39 that opens the opening 38 and the claw member housing portion 22 in the second direction X2. Therefore, as shown in Figure 2, the opening 38 and the claw member housing portion 22 are open in the second direction X2 by the notch 39, and the first claw member 40 can be placed in the opening 38 and the claw member housing portion 22 by passing through this notch 39.
[0031] As shown in Figure 5, the first claw member 40 has a shaft portion 42 housed in the claw member housing portion 22, a claw portion 43 protruding from the shaft portion 42, and a protruding portion 44 protruding from the shaft portion 42 in the opposite direction to the claw portion 43.
[0032] The outer diameter of the shaft portion 42 is circular when viewed from the axial direction. The outer diameter of the shaft portion 42 is larger than the width H1 of the opening 38 (see Figure 5). Therefore, the shaft portion 42 is rotatably sandwiched between the main body portion 31 and the spring holding portion 36 without falling out of the opening 38.
[0033] The claw portion 43 passes through the opening 38 and is positioned radially inward of the spring retaining portion 36. The claw portion 43 is constantly biased radially inward by the first coil spring 41.
[0034] The protruding portion 44 has a transmission surface 45 that faces in the opposite direction to the direction in which the claw portion 43 is positioned when viewed from the protruding portion 44. The transmission surface 45 faces the inner surface 22a of the claw member housing portion 22.
[0035] As shown in Figure 1, the hub 50 is annular in shape with a central axis O. The output shaft 102 is inserted into the inner circumference of the hub 50. A female spline 50a is formed on the inner surface of the hub 50, and the hub 50 and the output shaft 102 are spline-fitted.
[0036] As shown in Figure 1, a connecting wall 51 extending radially outward is formed on the outer circumferential surface of the hub 50. The connecting wall 51 extends circumferentially along the outer circumferential surface of the hub 50 and is formed in an annular shape. The connecting wall 51 has a first surface 52 facing a first direction X1 and a second surface 53 facing a second direction X2.
[0037] The connecting wall 51 is positioned in the second direction X2 with respect to both the first inner ring 1 and the first outer ring 10. The connecting wall 51 is fitted inside the fitting portion 17 of the first outer ring body 11. This connects the hub 50 and the first outer ring body 11.
[0038] As shown in Figure 3, the outer circumference of the connecting wall 51 is formed with a plurality of second triangular sections 54 and three second trapezoidal sections 55 that protrude radially outward. The second triangular sections 54 gradually narrow in circumferential width toward the radially outward direction, and are roughly triangular when viewed from the axial direction. The second triangular sections 54 fit together between the first triangular sections 18. For this reason, the first outer ring body 11 and the hub 50 are connected so that they do not rotate relative to each other.
[0039] The second trapezoidal section 55 has a wider circumferential width than the second triangular section 54 and is roughly trapezoidal when viewed from the axial direction. A second valley section 56 with a large circumferential gap is formed between the second trapezoidal section 55 and the second triangular section 54 which is positioned in the second rotational direction L2. The second trapezoidal section 55 fits into the first valley section 20 of the first outer ring body 11. The first trapezoidal section 19 also fits into the second valley section 56.
[0040] Furthermore, when fitting the connecting wall 51 to the fitting portion 17 of the first outer ring body 11, there is a possibility that the second surface 53 of the connecting wall 51 may be mistakenly facing the first outer ring body 11 instead of the first surface 52. In this case, the second valley portion 56 will be positioned in the first rotational direction L1, not in the second rotational direction L2 of the second trapezoidal portion 55. Therefore, when attempting to fit the connecting wall 51 to the fitting portion 17, the first trapezoidal portion 19 and the second trapezoidal portion 55 will overlap in the axial direction, and the connecting wall 51 will not fit to the fitting portion 17. Thus, the possibility of incorrectly assembling the hub 50 and the first outer ring body 11 (hereinafter simply referred to as incorrect assembly) is avoided.
[0041] As shown in Figure 3, the connecting wall 51 has six hub fixing holes 57 and three hub spring holes 58 that penetrate in the axial direction.
[0042] Figure 6 is a cross-sectional view of the hub fixing hole of Embodiment 1 when cut in the axial direction, and more specifically, a cross-sectional view taken along the line VI-VI in Figure 2. As shown in Figure 6, the hub fixing hole 57 is axially positioned relative to the cage fixing hole 34 and the outer ring fixing hole 12. The shaft portion 59a of the rivet 59 is inserted into the hub fixing hole 57, the cage fixing hole 34, and the outer ring fixing hole 12. The head 59b of the rivet 59 is in contact with the connecting wall 51 from the second direction X2.
[0043] Furthermore, a crimping portion 59c is formed at the end of the shaft portion 59a of the rivet 59 in the first direction X1. This crimping portion 59c is formed by crimping the end of the shaft portion 59a of the rivet 59 in the first direction X1. The crimping portion 59c abuts against the first outer ring body 11 from the first direction X1. As a result, the first outer ring body 11, the first retainer 30, and the hub 50 are integrated. In addition, the connecting wall 51 closes the notch 39 (see Figure 4) of the first retainer 30 from the second direction X2. As a result, the first claw member 40 does not fall out of the claw member housing portion 22.
[0044] Figure 7 is a perspective view of the first selectable plate of Embodiment 1, viewed from a second direction. The first selectable plate 60 is formed in an annular shape around a central axis O. The first selectable plate 60 comprises a plate body 61 positioned in a first direction X1 of the first outer ring 10, and a cam portion 62 extending in a second direction X2 from the radially inner end of the plate body 61. Three selectable plate spring holes 64 are formed in the plate body 61.
[0045] Figure 8 is a cross-sectional view of the spring hole for the selectable plate in Embodiment 1 when cut in the axial direction, and more specifically, it is a cross-sectional view taken along the line VIII-VIII in Figure 2. As shown in Figure 8, the spring hole 64 for the selectable plate overlaps the spring hole 13 for the outer ring, the spring hole 35 for the retainer, and the spring hole 58 for the hub in the axial direction.
[0046] The first selectable plate 60 is connected to the first outer ring 10 by a first connecting mechanism 70. The first connecting mechanism 70 includes a first pin 71, a retaining ring (second retaining part) 72, and a first coil spring for the selectable plate (first biasing member for the selectable plate) 73. The first pin 71 has a rod-shaped shaft portion 74 and a head portion (first retaining part) 75 provided at one end of the shaft portion 74, which are integrally formed.
[0047] The shaft portion 74 of the first pin 71 is inserted into the hub spring hole 58 from the second direction X2. The shaft portion 74 extends axially across the retainer spring hole 35, the outer ring spring hole 13, and the selectable plate spring hole 64. The end of the shaft portion 74 in the first direction X1 protrudes in the first direction X1 beyond the first selectable plate 60. A retaining ring 72 is attached to the end of the shaft portion 74 in the first direction X1.
[0048] An annular base 79 projecting radially inward is formed at the end of the inner circumferential surface of the outer ring spring hole 13 in the first direction X1. The first coil spring 73 for the selectable plate is passed through the shaft portion 74 of the first pin 71 and housed in the outer ring spring hole 13. One end of the first coil spring 73 for the selectable plate abuts against the head 75 of the first pin 71. The other end of the first coil spring 73 for the selectable plate abuts against the base 79.
[0049] Furthermore, the first coil spring 73 for the selectable plate is assembled in a compressed state. Therefore, the first coil spring 73 for the selectable plate constantly biases the head 75 of the first pin 71 toward the second direction X2. In other words, the first selectable plate 60 is constantly pressed toward the second direction X2 by the retaining ring 72. For this reason, when no load is acting on the plate body 61 in the first direction X1, the plate body 61 is in contact with the first side surface 14 of the first outer ring 10.
[0050] Furthermore, the outer diameter of the plate body 61 is larger than the outer diameter of the first outer ring body 11. Therefore, the radially outer end of the plate body 61 forms the first power transmission section 63, which protrudes radially outward from the outer peripheral surface 11a of the first outer ring body 11. In addition, all of the radially outer ends of the plate body 61 in the circumferential direction protrude radially outward from the first outer ring 10. Therefore, the first power transmission section 63 is formed in an annular shape.
[0051] Figure 9 is a cross-sectional view of the selectable one-way clutch of Embodiment 1 in the torque-cut state, and more specifically, a cross-sectional view taken along the line IX-IX in Figure 2. As shown in Figure 9, the cam portion 62 is positioned between the first inner ring 1 and the first outer ring 10. With the plate body 61 in contact with the first side surface 14 of the first outer ring 10, the cam portion 62 contacts the claw portion 43 from the radially inner side, lifting the claw portion 43 radially outward. The cam portion 62 is positioned radially inward and inclined as it moves toward the second direction X2. Therefore, the tip of the cam portion 62 can easily penetrate radially inward into the claw portion 43.
[0052] The shift drum 80 is an annular component, with a first outer ring 10, a first inner ring 1, and a hub 50 arranged inside. The axial length of the shift drum 80 is approximately the same as the axial length of the first outer ring 10. The side surface of the shift drum 80 in the first direction X1 is a first pressing surface 81 facing the first power transmission section 63.
[0053] An annular recess (connecting portion) 85 is formed on the outer circumferential surface 84 of the shift drum 80, recessed radially inward. A shift fork 110, which connects to the linear motion mechanism, is inserted into this recess 85. When the linear motion mechanism is driven, the shift fork 110 moves axially, and the shift drum 80 moves axially in response.
[0054] The inner circumferential surface 82 of the shift drum 80 is in axial sliding contact with the outer circumferential surface 11a of the first outer ring 10. As shown in Figure 2, a groove 83 is formed in the inner circumferential surface 82 of the shift drum 80, which is recessed in the radial direction and extends in the axial direction. The protrusion 21 of the first outer ring body 11 is positioned in the groove 83. Therefore, the shift drum 80 is movable in the axial direction relative to the first outer ring 10, but cannot rotate relative to it.
[0055] As shown in Figure 9, the inner circumferential surface 82 of the shift drum 80 has a first locking groove 86 and a second locking groove 87 formed therein, which are recessed radially outward and extend in the circumferential direction. The first locking groove 86 is formed in the axial central part of the shift drum 80. The second locking groove 87 is positioned in a second direction X2 relative to the first locking groove 86. The first locking groove 86 and the second locking groove 87 are each formed in an annular shape.
[0056] A plunger 88 is provided on the radially inner side of the shift drum 80. Although not specifically shown, there are three plungers 88 spaced at 120° intervals. The plungers 88 are positioned in holes 10b formed on the outer circumferential surface of the first outer ring 10. The plungers 88 are located in the center of the first outer ring 10 in the width direction. The balls of the plungers 88 are engaged with the first locking groove 86. Furthermore, when the shift drum 80 moves in the first direction X1, the balls of the plungers 88 engage with the second locking groove 87 (see Figure 10).
[0057] Furthermore, when the ball of the plunger 88 is engaged in the first locking groove 86, the first pressing surface 81 of the shift drum 80 does not press against the first power transmission unit 63. Therefore, no load in the first direction X1 is generated on the first selectable plate 60.
[0058] Next, the operation of the selectable one-way clutch 100 of Embodiment 1 will be described. First, the initial state of the selectable one-way clutch 100 will be described. The initial state of the selectable one-way clutch 100 is the state in which torque transmission is interrupted. The direction in which the input shaft 101 is rotating is the first rotational direction L1. Therefore, the first inner ring 1 is also rotating in the first rotational direction L1.
[0059] As shown in Figure 9, in the initial state of the selectable one-way clutch 100, the ball of the plunger 88 is engaged in the first locking groove 86. Therefore, the first pressing surface 81 of the shift drum 80 is simply in contact with the first selectable plate 60. Also, the cam portion 62 of the first selectable plate 60 is lifting the first claw member 40 (see also Figure 5). In other words, the claw portion 43 of the first claw member 40 is not engaged with the first tooth portion 3. Therefore, torque is not transmitted to the first outer ring 10, and the hub 50 and output shaft 102 do not rotate.
[0060] Furthermore, when the torque is cut off, the ball of the plunger 88 is engaged in the first locking groove 86, so even if the linear motion mechanism is not activated, displacement of the shift drum 80 is avoided.
[0061] Figure 10 is a cross-sectional view of the torque transmission state of the selectable one-way clutch of Embodiment 1. On the other hand, when the linear motion mechanism is driven and the shift fork 110 moves in the first direction X1, the shift drum 80 also moves in the first direction X1. The first pressing surface 81 of the shift drum 80 presses the first power transmission section 63 in the first direction X1 against the biasing force of the first coil spring 73 for the selectable plate. As a result, the first selectable plate 60 moves in the first direction X1, and the lifting of the claw section 43 by the cam section 62 is released.
[0062] Furthermore, the claw portion 43 is constantly biased radially inward by the first coil spring 41. As a result, the claw portion 43 fits between the first teeth 3 (see dashed line K40 in Figure 5). This causes the claw portion 43 to be pressed against the first teeth 3. The transmission surface 45 of the projection 44 of the first claw member 40 then presses the inner surface 22a of the claw member housing portion 22 in the first rotational direction L1. This transmits torque to the first outer ring 10, causing the first outer ring 10 and the hub 50 to rotate in the first rotational direction L1. As a result, the output shaft 102 connected to the hub 50 also rotates in the first rotational direction L1. When the shift drum 80 moves in the first direction X1 in this way, the selectable one-way clutch 100 transmits torque.
[0063] When the shift drum 80 moves in the first direction X1, the biasing force of the first coil spring 73 for the selectable plate acts on the shift drum 80. Therefore, the linear motion mechanism needs to continuously generate power to prevent the shift drum 80 from moving in the second direction X2, which places a heavy load on it. On the other hand, in this embodiment, when the shift drum 80 moves in the first direction X1, the ball of the plunger 88 enters the second locking groove 87, making it difficult for the shift drum 80 to move in the second direction X2. As a result, the load on the linear motion mechanism is reduced.
[0064] Furthermore, during torque transmission, the shift drum 80 cannot rotate relative to the first outer ring 10, and therefore rotates in the first rotational direction L1. On the other hand, since the shift fork 110 does not rotate, the recess 85 of the shift drum 80 slides against the shift fork 110.
[0065] Then, when the linear motion mechanism is driven and the shift fork 110 moves in the second direction X2, the shift drum 80 also moves in the second direction X2. The ball of the plunger 88 enters the first locking groove 86, and the shift drum 80 returns to its initial position. As a result, the pressure on the first selectable plate 60 by the shift drum 80 is released. The first selectable plate 60 then moves in the second direction X2 due to the biasing force of the first coil spring 73 for the selectable plate.
[0066] Here, the first claw member 40 is sandwiched between the first tooth portion 3 and the inner surface 22a (see dashed line K40 in Figure 5). In other words, a clamping force acts on the first claw member 40 between the first tooth portion 3 and the inner surface 22a. Therefore, although the tip of the cam portion 62 is pushed radially inward of the claw portion 43 by the biasing force of the first coil spring 73 for the selectable plate, the claw portion 43 cannot be lifted if the torque transmitted from the first inner ring 1 to the first outer ring 10 is large. For this reason, torque transmission from the first inner ring 1 to the first outer ring 10 continues.
[0067] On the other hand, if the torque transmitted from the first inner ring 1 to the first outer ring 10 is small, the clamping force acting on the first claw member 40 also decreases. As a result, the first selectable plate 60 moves in the second direction X2, and the cam portion 62 lifts the claw portion 43. This disengages the first claw member 40 from the first tooth portion 3, and torque transmission is interrupted. The first selectable plate 60 also comes into contact with the first side surface 14 of the first outer ring 10.
[0068] Furthermore, when the input shaft 101 rotates in the second rotation direction L2, the claw portion 43 rides up onto the first tooth portion 3, and the first claw member 40 and the first tooth portion 3 do not engage. Therefore, when the input shaft 101 rotates in the second direction X2, no torque is transmitted to the first outer ring 10.
[0069] As described above, according to Embodiment 1, the first power transmission unit 63 of the first selectable plate 60 protrudes radially outward from the plate body 61. Furthermore, the shift drum 80 that presses against the first power transmission unit 63 is positioned radially outward from the first outer ring 10. Therefore, the first power transmission unit 63 and the shift drum 80 do not protrude in the first direction X1 from the plate body 61 of the first selectable plate 60, and the selectable one-way clutch 100 is miniaturized in the axial direction.
[0070] Furthermore, when the first outer ring 10 rotates, the shift drum 80 rotates together with the first outer ring 10. This prevents wear on the outer circumferential surface 11a of the first outer ring 10 and the inner circumferential surface 82 of the shift drum 80.
[0071] Furthermore, when switching from the torque transmission state (see Figure 10) to the torque cut-off state (see Figure 9), the first selectable plate 60 moves in the second direction X2 by the biasing force of the first coil spring 73 for the selectable plate, and the cam portion 62 lifts the claw portion 43. If the first selectable plate 60 is forcibly moved in the second direction X2 by power generated by the linear motion mechanism, the cam portion 62 will lift the claw portion 43 even if the clamping force acting on the first claw member 40 is large. As a result, the load acting on the cam portion 62 and the claw portion 43 will increase, potentially causing deformation. In this embodiment, when the clamping force acting on the first claw member 40 is small, the cam portion 62 lifts the claw portion 43, so the load acting on the cam portion 62 and the claw portion 43 is small, making deformation less likely.
[0072] Furthermore, the outer diameter of the connecting wall 51 differs in shape when viewed from the first direction X1 and when viewed from the second direction X2 due to the second trapezoidal section 55 and the second valley section 56. This prevents incorrect assembly of the connecting wall 51 (hub 50) and the first outer ring body 11 (first outer ring 10).
[0073] Next, we will describe the selectable one-way clutch 100A of Embodiment 2. In the following description, we will focus on the differences from Embodiment 1.
[0074] (Embodiment 2) Figure 11 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut along the central axis. As shown in Figure 11, the selectable one-way clutch 100A of Embodiment 2 is interposed between two input shafts (first input shaft 301 and second input shaft 302) and one output shaft 303.
[0075] The selectable one-way clutch 100A of Embodiment 2 differs from Embodiment 1 in that it further comprises a second inner ring 201, a second outer ring 210, and a second selectable plate 260. The second inner ring 201, the second outer ring 210, and the second selectable plate 260 will be described below. Also, as shown in Figure 11, the virtual upper plane that overlaps with the connecting wall 51 is referred to as the virtual plane K51.
[0076] The second inner ring 201 is formed symmetrically with respect to the first inner ring 1 with respect to a virtual plane K51. Therefore, multiple female splines 202 are formed on the inner circumferential surface of the second inner ring 201. The second input shaft 302 is spline-fitted to the inner circumferential side of the second inner ring 201. In addition, multiple second teeth 203 are formed on the outer circumferential surface 204 of the second inner ring 201. Note that the rotational speed of the second input shaft 302 is different from the rotational speed of the first input shaft 301 connected to the first inner ring 1.
[0077] The second outer ring 210 comprises a second outer ring body 211, a second retainer 230, a second claw member 240 (see Figure 15), and a second coil spring 241 (see Figure 15). Furthermore, each component of the second outer ring 210 is formed symmetrically with respect to the components of the first outer ring 10 with reference to a virtual plane K51.
[0078] Therefore, on the side surface 215 of the second outer ring body 211 in the first direction X1, a fitting portion 217 is formed, similar to the first outer ring body 11, into which the connecting wall 51 of the hub 50 fits. Furthermore, on the inner circumference side of the fitting portion 217, similar to the fitting portion 17 of the first outer ring body 11, a plurality of third peaks (not shown), three third trapezoidal portions (not shown), and three third valleys (not shown) are formed.
[0079] The second triangular section 54 (see Figure 3) of the connecting wall 51 is fitted between the third peaks (not shown). The third trapezoidal section (not shown) is fitted into the second valley section 56 (see Figure 3). The second trapezoidal section 55 (see Figure 3) is fitted into the third valley section (not shown). From the above, the second outer ring body 211 is connected to the hub 50 in a way that prevents relative rotation. Furthermore, if the second outer ring body 211 is mistakenly fitted from the first direction X1 of the hub 50, the second trapezoidal section 55 and the third trapezoidal section of the hub 50 will overlap in the axial direction and will not fit. Thus, as with the first outer ring body 11, incorrect assembly to the hub 50 is prevented.
[0080] The second selectable plate 260 is formed symmetrically with respect to the first selectable plate 60 with respect to the virtual plane K51. Therefore, the second selectable plate 260 has a plate body 261 positioned in the second direction X2 of the second outer ring 210, a cam portion 262 that lifts the claw portion 243 (see Figure 15) of the second claw member 240, and a second power transmission portion 263 that protrudes radially outward from the outer peripheral surface 211a of the second outer ring body 211.
[0081] As described above, the second inner ring 201, the second outer ring 210, and the second selectable plate 260 are symmetrical with respect to the virtual plane K51. However, the structure for fixing the first outer ring 10 and the second outer ring 210 to the hub 50 is not symmetrical. Also, the structure for fixing the first selectable plate 60 and the second selectable plate 260 is not symmetrical. The structures that are not symmetrical will be described below.
[0082] Figure 12 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut axially along the rivets. As shown in Figure 12, the second outer ring body 211 has an outer ring fixing hole 212 that penetrates axially. The second retainer 230 has a retainer fixing hole 234 that penetrates axially. The second selectable plate 260 has an insertion hole 267 that penetrates axially. The outer ring fixing hole 212, the retainer fixing hole 234, and the insertion hole 267 are axially positioned relative to the hub fixing hole 57, the retainer fixing hole 34, and the outer ring fixing hole 12.
[0083] A rivet 59 is inserted from the second direction X2 of the insertion hole 267, and the shaft portion 59a of the rivet 59 extends axially across the outer ring fixing hole 212, the cage fixing hole 234, the hub fixing hole 57, the cage fixing hole 34, and the outer ring fixing hole 12. The head 59b of the rivet 59 abuts against the side surface 214 of the second outer ring body 211 in the second direction X2 from the second direction X2.
[0084] The crimping portion 59c formed at the end of the shaft portion 59a in the first direction X1 is in contact with the first outer ring body 11 from the first direction X1. Therefore, the first outer ring body 11, the first retainer 30, the hub 50, the second outer ring body 211, and the second retainer 230 are integrated. In other words, the first outer ring 10, the second outer ring 210, and the hub 50 rotate together.
[0085] Figure 13 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut axially along the first pin. As shown in Figure 13, the second outer ring body 211 has an outer ring spring hole 213 that penetrates axially. The second retainer 230 has a retainer spring hole 235 that penetrates axially. The second selectable plate 260 has a selectable plate spring hole 264 that penetrates axially. The selectable plate spring hole 264, the outer ring spring hole 213, and the retainer spring hole 235 overlap axially with the hub spring hole 58, the retainer spring hole 35, the outer ring spring hole 13, and the selectable plate spring hole 64.
[0086] The first pin 71 is inserted into the selectable plate spring hole 264 from the second direction X2. The shaft portion 74 of the first pin 71 extends axially across the outer ring spring hole 213, the cage spring hole 235, the hub spring hole 58, the cage spring hole 35, the outer ring spring hole 13, and the selectable plate spring hole 64. A retaining ring 72 is provided at the end of the shaft portion 74 in the first direction X1. The retaining ring 72 abuts against the first selectable plate 60 from the first direction X1.
[0087] One end of the first coil spring 73 for the selectable plate is in contact with the head 75 of the first pin 71. The other end of the first coil spring 73 for the selectable plate is in contact with the base 79. The first coil spring 73 for the selectable plate is assembled in a compressed state. As a result, the first selectable plate 60 is constantly pressed in the second direction X2 by the retaining ring 72, and the plate body 61 is in contact with the first outer ring 10.
[0088] Figure 14 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, cut axially along the fourth pin. As shown in Figure 14, the second selectable plate 260 is fixed by the second coupling mechanism 270. The second coupling mechanism 270 comprises a second pin 271, a retaining ring 272, and a second coil spring 273 for the selectable plate.
[0089] The first outer ring body 11 has an outer ring spring hole 13A. The first retainer 30 has a retainer spring hole 35A. The first selectable plate 60 has a selectable plate spring hole 64A. The connecting wall 51 of the hub 50 has a hub spring hole 58A. The second outer ring body 211 has an outer ring spring hole 213A. The second retainer 230 has a retainer spring hole 235A. The second selectable plate 260 has a selectable plate spring hole 264A. The outer ring spring hole 13A, the retainer spring hole 35A, the selectable plate spring hole 64A, the hub spring hole 58A, the outer ring spring hole 213A, and the retainer spring hole 235A are all arranged to overlap in the axial direction.
[0090] The second pin 271 is inserted into the selectable plate spring hole 64A from the first direction X1. The shaft portion 274 of the second pin 271 extends axially across the outer ring spring hole 13A, the cage spring hole 35A, the hub spring hole 58A, the cage spring hole 235A, the outer ring spring hole 213A, and the selectable plate spring hole 264A. A retaining ring 272 is provided at the end of the shaft portion 274 in the second direction X2. The retaining ring 272 abuts against the second selectable plate 260 from the second direction X2.
[0091] One end of the second coil spring 273 for the selectable plate is in contact with the head 275 of the second pin 271. The other end of the second coil spring 273 for the selectable plate is in contact with the base 279 formed in the spring hole 213A for the outer ring. The second coil spring 273 for the selectable plate is assembled in a compressed state. As a result, the second selectable plate 260 is constantly pressed in the first direction X1 by the retaining ring 272, and the plate body 261 is in contact with the second outer ring 210.
[0092] Figure 15 is a cross-sectional view of the selectable one-way clutch of Embodiment 2, when the claw portions of the first claw member and the second claw member are cut axially so that they overlap. As shown in Figure 15, the shift drum 80A of Embodiment 2 is longer in the axial direction than the shift drum 80 of Embodiment 1, and is approximately equal to the combined axial length of the first outer ring 10 and the second outer ring 210. The shift drum 80A has a second pressing surface 280 that faces the second direction X2 and is opposite to the second power transmission section 263.
[0093] In Embodiment 2, the plunger 88 is provided on the second outer ring body 211. A first locking groove 281, a second locking groove 282, and a third locking groove 283 are formed on the inner circumferential surface 82 of the shift drum 80A. When the linear motion mechanism is not activated, the plunger 88 is fitted into the first locking groove 281. The second locking groove 282 is located in the second direction X2 of the first locking groove 281. The third locking groove 283 is located in the first direction X1 of the first locking groove 281. The second locking groove 282 is open in the second direction X2.
[0094] Next, the selectable one-way clutch 100A of Embodiment 2 will be described.
[0095] As shown in Figure 15, in the initial state of the selectable one-way clutch 100A, the ball of the plunger 88 is engaged in the first locking groove 281. The first pressing surface 81 of the shift drum 80A is simply in contact with the first power transmission portion 63 of the first selectable plate 60. In other words, the cam portion 62 of the first selectable plate 60 lifts the claw portion 43 of the first claw member 40. Therefore, torque is not transmitted from the first inner ring 1 to the first outer ring 10.
[0096] Furthermore, in the initial state of the selectable one-way clutch 100A, the second pressing surface 280 of the shift drum 80A is simply in contact with the second power transmission portion 263 of the second selectable plate 260. Also, the cam portion 262 of the second selectable plate 260 lifts the claw portion 243 of the second claw member 240. Therefore, torque is not transmitted from the second inner ring 201 to the second outer ring 210. As a result, the torque of the first input shaft 301 and the second input shaft 302 is not transmitted to the output shaft 303 (see Figure 11).
[0097] Figure 16 is a cross-sectional view of the selectable one-way clutch of Embodiment 2 in which torque is transmitted between the first inner ring and the first outer ring. As shown in Figure 16, when the linear motion mechanism is driven and the shift fork 110 moves in the first direction X1, the first pressing surface 81 of the shift drum 80A presses the first power transmission unit 63 in the first direction X1 against the biasing force of the first coil spring 73 for the selectable plate. As a result, the first selectable plate 60 moves in the first direction X1 and the lifting of the claw unit 43 by the cam unit 62 is released.
[0098] The claw portion 43, biased radially inward by the first coil spring 41, enters between the first teeth 3. As a result, the first claw member 40 is pressed in the first rotational direction L1, and torque is transmitted to the first outer ring 10. Then, the first outer ring 10, the second outer ring 210, and the hub 50 rotate in the first rotational direction L1, and the output shaft 303 connected to the hub 50 also rotates in the first rotational direction L1. When the first outer ring 10, the second outer ring 210, and the hub 50 rotate, the shift drum 80A also rotates in the first rotational direction L1.
[0099] Figure 17 is a cross-sectional view of the selectable one-way clutch of Embodiment 2 in which torque is transmitted between the second inner ring 201 and the second outer ring 210. As shown in Figure 17, when the linear motion mechanism is driven and the shift fork 110 moves in the second direction X2, the second pressing surface 280 of the shift drum 80A presses the second power transmission section 263 in the second direction X2 against the biasing force of the second coil spring 273 for the selectable plate. As a result, the second selectable plate 260 moves in the second direction X2, and the lifting of the claw section 243 by the cam section 262 is released.
[0100] The claw portion 243, biased radially inward by the second coil spring 241, enters between the second teeth 203. As a result, the second claw member 240 is pressed in the first rotational direction L1, and torque is transmitted to the second outer ring 210. In other words, the first outer ring 10, the second outer ring 210, and the hub 50 rotate in the first rotational direction L1, and the output shaft 303 connected to the hub 50 also rotates in the first rotational direction L1. When the first outer ring 10, the second outer ring 210, and the hub 50 rotate, the shift drum 80A also rotates in the first rotational direction L1.
[0101] As described above, according to Embodiment 2, the torque transmitted to the output shaft 303 can be selected to be the torque of the first input shaft 301 or the torque of the second input shaft 302. Furthermore, one shift drum 80A moves two selectable plates (first selectable plate 60 and second selectable plate 260). Therefore, the number of shift drums 80A is reduced, and the number of parts can be reduced.
[0102] Furthermore, when the pressing force from the shift drum 80A is released, the second selectable plate 260 moves in the first direction X1 due to the biasing force of the second coil spring 273 for the selectable plate. Also, when the clamping force acting on the second claw member 240 decreases, the cam portion 262 lifts the claw portion 243. In other words, the load acting on the cam portion 62 and the claw portion 243 is small. Therefore, deformation of the cam portion 262 and the second claw member 240 is avoided.
[0103] Although embodiments have been described above, this disclosure is not limited to the examples described in the embodiments. For example, in this embodiment, the claw members (first claw member 40, second claw member 240) are provided on the outer ring (first outer ring 10, second outer ring 210) side and the teeth (first teeth 3, second teeth 203) are provided on the inner ring (first inner ring 1, second inner ring 201) side, but in this disclosure, the claw members may be provided on the inner ring side and the teeth may be provided on the outer ring side.
[0104] Furthermore, in this embodiment, in order to prevent misassembly of the first outer ring 10 and the hub 50, the first trapezoidal portion 19 and the first valley portion 20 are provided on the fitting portion 17, and the second trapezoidal portion 55 and the second valley portion 56 are provided on the connecting wall 51. Here, if the shape of the outer diameter of the connecting wall 51 as viewed from the first direction X1 and the shape as viewed from the second direction X2 are different from each other, misassembly of the first outer ring 10 and the hub 50 can be prevented. Therefore, this disclosure may also prevent misassembly by shapes other than those shown in the embodiment.
[0105] Furthermore, in Embodiment 1, the first selectable plate 60 is configured to move in the second direction X2 by the first coil spring 73 for the selectable plate of the first coupling mechanism 70, but the disclosure is not limited thereto. For example, the first power transmission section 63 of the first selectable plate 60 may be connected to the shift drum 80, so that the first selectable plate 60 moves in the second direction X2 together with the shift drum 80. In other words, the first coupling mechanism 70 is not an essential component in the disclosure.
[0106] Furthermore, in Embodiment 2, the first selectable plate 60 and the second selectable plate 260 are returned to their initial state by the first coil spring 73 for the selectable plate and the second coil spring 273 for the selectable plate. However, as described above, the present disclosure does not necessarily require the inclusion of both the first coil spring 73 and the second coil spring 273 for the selectable plate.
[0107] Furthermore, although the shift drums 80 and 80A are not rotatable relative to the first outer ring 10, etc., in this disclosure they may be rotatable relative to each other.
[0108] Furthermore, this disclosure may also be a combination of the following configurations. (1) The first inner ring is formed in a ring shape, A first outer ring formed in an annular shape, with the first inner ring positioned inside, A shift drum formed in an annular shape, with the first inner ring and the first outer ring arranged inside, A first selectable plate for separating the first inner ring and the first outer ring, Equipped with, The direction parallel to the rotation axis of the first inner ring is defined as the axial direction. One of the axial directions is designated as the first direction, The other axial direction is designated as the second direction, A plurality of first teeth are formed on one of the outer circumferential surfaces of the first inner ring and the inner circumferential surface of the first outer ring. The outer circumferential surface of the first inner ring and the other inner circumferential surface of the first outer ring are provided with a tiltable first claw member and a first biasing member that biases the first claw member toward the first teeth. The first selectable plate is, An annular plate body positioned in a first direction relative to the first outer ring, A first cam portion extends from the radially inner end of the plate body in the second direction and lifts the first claw member against the biasing force of the first biasing member, It has, The radially outer end of the plate body is a first power transmission section that protrudes radially outward from the outer circumferential surface of the first outer ring. A connecting portion is formed on the outer circumferential surface of the shift drum, which connects to the linear motion mechanism. The side surface of the shift drum facing the first direction is a first pressing surface facing the first power transmission unit in the axial direction. When the shift drum moves in the first direction, the first power transmission unit is pressed in the first direction, and the lifting of the first claw member by the first cam unit is released. Selectable one-way clutch. (2) The inner circumferential surface of the shift drum has a groove formed therein that is recessed radially outward and extends in the axial direction. The outer circumferential surface of the first outer ring has a protrusion that projects radially outward and extends in the axial direction. The protrusion is positioned in the groove, and the shift drum is movable in the axial direction relative to the first outer ring but cannot rotate relative to it. (1) Selectable one-way clutch as described above. (3) It has a first connecting mechanism that connects the first outer ring and the first selectable plate, The first coupling mechanism is, A shaft portion that penetrates the first outer ring and the first selectable plate in the axial direction, A first retaining portion is provided at the end of the shaft portion in the first direction, A second retaining portion is provided at the end of the shaft portion in the second direction, A first biasing member for a selectable plate is positioned between the first outer ring and the second retaining portion, and constantly biases the second retaining portion in the second direction. It has, When the pressure applied by the shift drum is released, the first selectable plate is pressed in the second direction by the first retaining portion. A selectable one-way clutch as described in (1) or (2). (4) The first inner ring has an annular hub positioned inside it, An annular connecting wall extending radially outward is formed on the outer circumferential surface of the hub. The connecting wall is arranged in the second direction relative to the first inner ring and the first outer ring. The first outer ring and the connecting wall are connected to each other in a way that prevents relative rotation. A selectable one-way clutch as described in any one of (1) to (3). (5) An annular fitting wall is formed on the side surface of the first outer ring facing the second direction, projecting in the second direction and surrounding the outer circumference of the connecting wall. The connecting wall fits into the inner circumference of the fitting wall, The outer diameter of the connecting wall is such that the shape viewed from the first direction and the shape viewed from the second direction are different from each other. (4) Selectable one-way clutch as described above. (6) An annular second inner ring is positioned in the second direction of the first inner ring, with the connecting wall in between, An annular second outer ring is positioned in the second direction of the first outer ring, with the connecting wall in between, A second selectable plate is positioned in the second direction relative to the second outer ring and separates the second inner ring from the second outer ring, Equipped with, The virtual plane is defined as the virtual plane that overlaps with the aforementioned connecting wall. The first inner ring and the second inner ring are formed symmetrically with respect to the virtual plane, The first outer ring and the second outer ring are formed symmetrically with respect to the virtual plane, The first selectable plate and the second selectable plate are formed symmetrically with respect to the virtual plane, The first outer ring, the connecting wall, and the second outer ring are connected to each other. The second selectable plate has a second power transmission portion that protrudes radially outward from the outer circumferential surface of the second outer ring, The side surface of the shift drum facing the second direction is a second pressing surface that faces the second power transmission unit in the axial direction. When the shift drum moves in the second direction, the second power transmission unit is pressed in the second direction, and the second selectable plate releases the lift of the second claw member located on the inner circumference side of the second outer ring. (4) or (5) Selectable one-way clutch. [Explanation of Symbols]
[0109] 1. First inner ring 3 1st tooth part 10. First outer ring 17, 217 Fitting part 18 1st triangle part 19. First trapezoidal section 20 First Valley 21 Convex part 30 1st retainer 31 Main body 32 Side wall 36 Spring retaining part 38 Opening 38a Obstruction wall 40 1st claw member 41. First coil spring (first biasing member) 43, 243 Nail area 50 Hub 51 Connecting wall 54 2nd triangle part 55 Second trapezoidal section 56 Second Valley 59 rivets 60. First Selectable Plate 61, 261 Plate body 62, 262 Cam section 63 First power transmission section 70 First connection mechanism 71 Pin 1 72,272 Retaining ring 73. First coil spring for selectable plate 75 Head 80, 80A shift drum 81 First pressing surface 83 Groove 85 recess 86, 281 First locking groove 87, 282 Second locking groove 88 Plunger 100, 100A Selectable One-Way Clutch 101 input axes 102, 303 Output shaft 201 Second Inner Ring 203 2nd tooth part 210 Second outer ring 211 Second outer ring body 230 2nd retainer 240 Second claw member 241 Second coil spring 260 Second Selectable Plate 263 Second power transmission section 270 Second connection mechanism 271 Pin 2 273 Second coil spring for selectable plate 280 Second pressing surface 283 Third locking groove
Claims
1. The first inner ring is formed in a ring shape, A first outer ring formed in an annular shape, with the first inner ring positioned inside, A shift drum formed in an annular shape, with the first inner ring and the first outer ring arranged inside, A first selectable plate for separating the first inner ring and the first outer ring, Equipped with, The direction parallel to the rotation axis of the first inner ring is defined as the axial direction. One of the axial directions is designated as the first direction, The other direction in the axial direction is designated as the second direction. A plurality of first teeth are formed on one of the outer circumferential surfaces of the first inner ring and the inner circumferential surface of the first outer ring. The outer circumferential surface of the first inner ring and the other inner circumferential surface of the first outer ring are provided with a tiltable first claw member and a first biasing member that biases the first claw member toward the first teeth. The first selectable plate is, An annular plate body positioned in a first direction relative to the first outer ring, A first cam portion extends from the radially inner end of the plate body in the second direction and lifts the first claw member against the biasing force of the first biasing member, It has, The radially outer end of the plate body is a first power transmission section that protrudes radially outward from the outer circumferential surface of the first outer ring. A connecting portion is formed on the outer circumferential surface of the shift drum, which connects to the linear motion mechanism. The side surface of the shift drum facing the first direction is a first pressing surface that faces the first power transmission unit in the axial direction. When the shift drum moves in the first direction, the first power transmission unit is pressed in the first direction, and the lifting of the first claw member by the first cam unit is released. Selectable one-way clutch.
2. The inner circumferential surface of the shift drum has a groove formed therein that is recessed radially outward and extends in the axial direction. A convex portion is formed on the outer circumferential surface of the first outer ring, which protrudes radially outward and extends in the axial direction. The protrusion is positioned in the groove, and the shift drum is movable in the axial direction relative to the first outer ring but cannot rotate relative to it. The selectable one-way clutch according to claim 1.
3. It has a first connecting mechanism that connects the first outer ring and the first selectable plate, The first coupling mechanism is, A shaft portion that penetrates the first outer ring and the first selectable plate in the axial direction, A first retaining portion is provided at the end of the shaft portion in the first direction, A second retaining portion is provided at the end of the shaft portion in the second direction, A first biasing member for a selectable plate is positioned between the first outer ring and the second retaining portion, and constantly biases the second retaining portion in the second direction. It has, When the pressure applied by the shift drum is released, the first selectable plate is pressed in the second direction by the first retaining portion. The selectable one-way clutch according to claim 1.
4. The first inner ring has an annular hub positioned inside it, An annular connecting wall extending radially outward is formed on the outer circumferential surface of the hub. The connecting wall is arranged in the second direction with respect to the first inner ring and the first outer ring. The first outer ring and the connecting wall are connected to each other in a way that prevents relative rotation. The selectable one-way clutch according to claim 1.
5. An annular fitting wall is formed on the side surface of the first outer ring facing the second direction, projecting in the second direction and surrounding the outer circumference of the connecting wall. The connecting wall fits into the inner circumference of the fitting wall, The outer diameter of the connecting wall is such that the shape viewed from the first direction and the shape viewed from the second direction are different from each other. The selectable one-way clutch according to claim 4.
6. An annular second inner ring is positioned in the second direction of the first inner ring, with the connecting wall in between, An annular second outer ring is positioned in the second direction of the first outer ring, with the connecting wall in between, A second selectable plate is positioned in the second direction relative to the second outer ring and separates the second inner ring from the second outer ring, Equipped with, The virtual plane is defined as the virtual plane that overlaps with the aforementioned connecting wall. The first inner ring and the second inner ring are formed symmetrically with respect to the virtual plane, The first outer ring and the second outer ring are formed symmetrically with respect to the virtual plane, The first selectable plate and the second selectable plate are formed symmetrically with respect to the virtual plane, The first outer ring, the connecting wall, and the second outer ring are connected to each other. The second selectable plate has a second power transmission portion that protrudes radially outward from the outer circumferential surface of the second outer ring, The side surface of the shift drum facing the second direction is a second pressing surface that faces the second power transmission unit in the axial direction. When the shift drum moves in the second direction, the second power transmission unit is pressed in the second direction, and the second selectable plate releases the lift of the second claw member located on the inner circumference side of the second outer ring. A selectable one-way clutch according to claim 4 or claim 5.