JP2017211073A - Selectable one-way clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a selectable one-way clutch that can prevent reductions in lifetimes of components without increasing its body size and cost.SOLUTION: A selectable one-way clutch 1 comprises a pocket plate 10, a notch plate 20, a selector plate 30, an arm 40, and an actuator 60. The pocket plate 10 comprises: an oil passage 12 formed in a circumferential direction; a communication part 14 formed between the oil passage 12 and an arm movement hole 13; and a stopper 51 arranged in the communication part 14, and biased toward the side of the oil passage 12. The stopper 51 can move between the oil passage 12 and the arm movement hole 13 depending on an amount of oil in the oil passage 12, and protrudes toward the side of the arm movement hole 13 to regulate movement of the arm 40 when the amount of the oil in the oil passage 12 becomes equal to or larger than a certain value.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a selectable one-way clutch.

  As a one-way clutch, for example, Patent Document 1 discloses a state in which rotation of a notch plate (second clutch member) is restricted in one direction by rotating a selector plate (switching mechanism) by an actuator and moving a strut (engaged state). ) And a state that allows rotation in both directions (non-engaged state) is disclosed.

JP, 2015-209053, A

  In the conventional selectable one-way clutch disclosed in Patent Document 1, when the notch plate rotates at a high speed, the selector plate may rotate unintentionally due to, for example, an actuator failure. In such a case, when the notch plate rotates forward, the strut meshes with the notch of the notch plate, and excessive torque is input from the notch plate side to the pocket plate side. On the other hand, when the notch plate rotates negatively, the strut repeatedly collides with the notch plate. Therefore, in the conventional selectable one-way clutch, there is a possibility that the life of components such as struts may be reduced under such circumstances.

  As a method for preventing the malfunction of the actuator as described above, for example, as shown in FIG. 5, in addition to the first actuator 160 for rotating the selector plate 30, the malfunction of the first actuator 160 is performed. It is also conceivable to separately provide a second actuator 170 for preventing this.

  Specifically, the selectable one-way clutch 101 shown in FIG. 5 has a groove 161a formed in the plunger 161 of the first actuator 160, and the tip of the plunger 171 of the second actuator 170 is locked in the groove 161a. Accordingly, the malfunction of the plunger 161 can be prevented.

  However, when the actuators are divided into two systems like the selectable one-way clutch 101 shown in FIG. 5, there is a problem that the physique and cost increase.

  The present invention has been made in view of the above, and an object of the present invention is to provide a selectable one-way clutch that can prevent the life of the component parts from decreasing without increasing the physique and cost.

  In order to solve the above-described problems and achieve the object, a selectable one-way clutch according to the present invention includes a pocket plate, a notch plate that is disposed to face the pocket plate and rotates coaxially with the pocket plate, An engagement state formed between the pocket plate and the notch plate, and rotating coaxially with the pocket plate and the notch plate to transmit torque between the pocket plate and the notch plate, and the pocket A selector plate that switches a non-engagement state in which torque is not transmitted between the plate and the notch plate, and an arm movement hole formed in a part of the outer periphery of the pocket plate, and one end side is connected to the selector plate. Arm and the pocket plate In the selectable one-way clutch, which is connected to the other end side of the arm protruding from the circumference and rotates the selector plate via the arm, the pocket plate has an oil passage formed in the circumferential direction, A communicating portion formed between the oil passage and the arm movement hole; and a stopper disposed in the communicating portion and biased toward the oil passage, wherein the stopper has an oil amount of the oil passage. When the oil passage is movable between the oil passage and the arm movement hole, and the oil amount in the oil passage exceeds a certain level, the arm movement hole is protruded to restrict the movement of the arm. Features.

  As a result, in the selectable one-way clutch, when the amount of oil in the oil passage formed in the pocket plate increases as the notch plate rotates at a high speed, the stopper moves from the oil passage side to the arm movement hole side to move the arm. regulate.

  According to the selectable one-way clutch according to the present invention, when the notch plate rotates at high speed, the movement of the arm is restricted and the selector plate does not rotate unintentionally. Therefore, it is possible to prevent the life of the component parts from decreasing without increasing the physique and cost.

FIG. 1 is a diagram schematically showing a configuration of a main part of a selectable one-way clutch according to an embodiment of the present invention. 2 is an XX cross-sectional view of the selectable one-way clutch shown in FIG. FIG. 3 is an XX cross-sectional view of the selectable one-way clutch shown in FIG. 1 and shows the position of the stopper when the amount of oil in the oil passage in the pocket plate is small. 4 is a cross-sectional view taken along line XX of the selectable one-way clutch shown in FIG. 1 and shows the position of the stopper when the amount of oil in the oil passage in the pocket plate is large. FIG. 5 is a diagram schematically showing a configuration of a main part of a selectable one-way clutch according to the prior art. 6 is a YY sectional view of the selectable one-way clutch shown in FIG.

  A selectable one-way clutch (hereinafter referred to as SOWC) according to an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  The SOWC 1 is mounted on, for example, a power transmission device in a hybrid vehicle, and rotates a switching member (a selector plate) disposed between a fixed side race (a pocket plate described later) and a rotation side race (a notch plate described later). It is comprised so that a combined state and a non-engagement state can be switched.

  As shown in FIG. 1, the SOWC 1 includes a pocket plate 10, a notch plate 20, a selector plate 30, an arm 40, and an actuator 60. Although not shown in the figure, lubricating oil for lubrication is supplied into the SOWC 1, that is, between the pocket plate 10, the selector plate 30, and the notch plate 20, and the like.

  The pocket plate 10 is formed in a cylindrical shape. A plurality of pockets (accommodating recesses (not shown)) recessed in the plate thickness direction are formed on the surface of the pocket plate 10 facing the notch plate 20, and a plate-like strut (engagement) is formed inside the pocket. 11) is housed. The “plate thickness direction” described above is a direction that coincides with the rotational axis direction of the notch plate 20.

  As shown in FIG. 2, an arm moving hole 13 for moving the arm 40 is formed in a part of the outer periphery of the pocket plate 10. The arm movement hole 13 is formed through the inner peripheral surface and the outer peripheral surface of the pocket plate 10 in the radial direction of the pocket plate 10. Other configurations of the pocket plate 10 will be described later.

  The strut 11 is disposed inside each pocket in the pocket plate 10. An elastic member (not shown) that biases the strut 11 toward the notch plate 20 is provided between the strut 11 and the pocket. The strut 11 is accommodated in the pocket, with the selector plate 30 rotating coaxially with the pocket plate 10 such that one end thereof rises toward the notch plate 20 and the entire strut 11 including the one end. It is configured so that the posture is switched to the state where it has been.

  The notch plate 20 is formed in an annular shape (hollow disk shape). The notch plate 20 is disposed to face the surface of the pocket plate 10 where the pockets are formed, and is rotatable relative to the pocket plate 10.

  A plurality of notches (engagement recesses (not shown)) recessed in the thickness direction are formed on the surface of the notch plate 20 facing the pocket plate 10. This notch is a recess into which one end of the strut 11 rising to the notch plate 20 side passes through a window hole (not shown) formed in the selector plate 30.

  The selector plate 30 is formed in an annular shape (hollow disk shape). The selector plate 30 is disposed so as to face the pocket plate 10 and the notch plate 20. The selector plate 30 is switched between an engaged state and a non-engaged state as will be described later by being coaxial with the pocket plate 10 and the notch plate 20 and rotating around the axis by a predetermined angle.

  In the selector plate 30, a window hole (not shown) penetrating in the thickness direction is formed at a position corresponding to the strut 11 of the pocket plate 10. The selector plate 30 is formed with a circular oil passage (axial oil passage) 21 penetrating in the plate thickness direction. The oil passage 21 is for flowing lubricating oil between the pocket plate 10 and the notch plate 20.

  Here, when the position of the window hole of the selector plate 30 coincides with the position of the strut 11 in the circumferential direction of the SOWC 1, one end portion of the strut 11 is pushed by the elastic member and passes through the window hole to the notch plate 20 side. Stand up to. When the notch plate 20 rotates in the engaging direction (forward direction) with respect to the pocket plate 10 in a state where one end of the strut 11 rises to the notch plate 20 side in this way, the strut 11 engages with the notch. , SOWC1 is engaged. In this engaged state, torque is transmitted between the pocket plate 10 and the notch plate 20.

  On the other hand, when the position of the window hole of the selector plate 30 is shifted with respect to the position of the strut 11 in the circumferential direction of the SOWC 1, the strut 11 is pushed in by the portion of the selector plate 30 where the window hole is not formed. The whole is accommodated in the pocket. Thereby, SOWC1 will be in a non-engagement state. In this non-engaged state, the strut 11 does not engage the notch (the engagement between the strut 11 and the notch is released), so that torque is not transmitted between the pocket plate 10 and the notch plate 20. .

  The arm 40 is for transmitting the driving force of the actuator 60 to the selector plate 30. As shown in FIG. 2, the arm 40 is inserted into an arm movement hole 13 formed in a part of the outer periphery of the pocket plate 10, and one end side thereof is connected to the selector plate 30. Further, the other end side of the arm 40 protrudes from the outer periphery of the pocket plate 10 and is connected to the actuator 60 as shown in FIG.

  The actuator 60 rotates the selector plate 30 via the arm 40. The actuator 60 is constituted by a solenoid, for example, and includes a plunger 61 as shown in FIG.

  The plunger 61 is connected to the other end side of the arm 40 and moves linearly in the tangential direction of the outer periphery of the selector plate 30 to move the other end side of the arm 40 in the outer peripheral direction of the selector plate 30.

  Here, in the conventional SOWC 101 as shown in FIG. 6, only the arm moving hole 113 is formed in the pocket plate 110, but in the SOWC 1 according to the present embodiment, as shown in FIG. An arm movement hole 13, an oil passage 12, and a communication portion 14 are formed, and a stopper 51 is disposed in the communication portion 14.

  As shown in FIG. 1, the oil passage (circumferential oil passage) 12 is continuously formed in the circumferential direction on the outer peripheral side of the pocket plate 10. The oil passage 12 is formed inside the pocket plate 10, that is, on the radially inner side of the outer peripheral surface of the pocket plate 10. In FIG. 2, arrow A indicates the direction in which the lubricating oil flows when notch plate 20 rotates in the positive direction (engagement direction) with respect to pocket plate 10, and arrow B indicates notch plate 20 with respect to pocket plate 10. The directions in which the lubricating oil flows when rotating in the negative direction (non-engagement direction) are shown.

  As shown in FIG. 2, the communication portion 14 is formed between the oil passage 12 and the arm movement hole 13, and communicates the oil passage 12 and the arm movement hole 13. Further, the communication portion 14 is formed with a width smaller than the width of the arm movement hole 13 in the circumferential direction of the pocket plate 10. The communication portion 14 is formed inside the pocket plate 10, that is, on the inner side in the radial direction than the outer peripheral surface of the pocket plate 10, similarly to the oil passage 12.

  The stopper 51 is disposed in the communication portion 14 and is urged toward the oil passage 12 by an elastic member 52 connected to the pocket plate 10. That is, a force (hereinafter referred to as “restoring force F <b> 1”) that the elastic member 52 tries to restore acts on the stopper 51. Accordingly, the stopper 51 is in close contact with one wall side of the oil passage 12 as shown in FIG. 2 in a state where the lubricating oil does not flow in the oil passage 12 (or in a state where the amount of oil is very small). The oil passage 12 is blocked. A predetermined gap is provided between the stopper 51 and the communication portion 14, and a seal member 53 is provided in the gap.

  The stopper 51 has an inclined portion 51a that is inclined with respect to the direction in which the oil passage 12 extends. Accordingly, when the lubricating oil flows into the oil passage 12, the lubricating oil collides with the inclined portion 51a, and the elastic member 52 pushes the stopper 51 in the direction opposite to the direction in which the stopper 51 is urged (hereinafter referred to as "pushing"). Output F2 ").

  Here, the stopper 51 is movable between the oil passage 12 and the arm movement hole 13 in accordance with the amount of lubricating oil flowing through the oil passage 12 when the selector plate 30 is in the closed state. The stopper 51 is configured to protrude toward the arm movement hole 13 and restrict the movement of the arm 40 when the amount of lubricating oil flowing through the oil passage 12 exceeds a certain level.

  For example, when the notch plate 20 is rotating at a low speed, the amount of lubricating oil flowing through the oil passage 12 is small, so that the restoring force F1 acting on the stopper 51 is reduced as shown in FIG. It becomes larger than the output F2 (F1> F2). In such a case, the stopper 51 slightly moves toward the arm moving hole 13 side, but does not protrude toward the arm moving hole 13 side. Accordingly, the movement of the arm 40 in the arm movement hole 13 is allowed. Further, the stroke width S1 of the arm 40 at that time is the same as the width of the arm moving hole 13.

  On the other hand, when the notch plate 20 is rotating at a high speed, the amount of lubricating oil flowing through the oil passage 12 is large. Therefore, as shown in FIG. 4, the restoring force F1 acting on the stopper 51 is reduced by pushing the lubricating oil. It becomes smaller than the output F2 (F1 <F2). In such a case, the stopper 51 pushed out by the lubricating oil moves greatly to the arm moving hole 13 side and protrudes to the arm moving hole 13 side. Accordingly, the movement of the arm 40 in the arm movement hole 13 is restricted. Further, the stroke width S2 of the arm 40 at that time is significantly smaller than the stroke width S1 in FIG.

  3 and 4 exemplify the state of the stopper 51 when the notch plate 20 rotates in the positive direction, but the lubricating oil is also applied to the state of the stopper 51 when the notch plate 20 rotates in the negative direction. 3 and 4 except that the flowing direction is opposite to the arrow A (arrow B).

  In the SOWC 1 having the above-described configuration, when the oil amount of the oil passage 12 formed in the pocket plate 10 increases as the notch plate 20 rotates at a high speed, the stopper 51 moves from the oil passage 12 side to the arm moving hole 13. The movement of the arm 40 is restricted. Therefore, the movement of the arm 40 is restricted when the notch plate 20 rotates at high speed, and the selector plate 30 does not rotate unintentionally. Therefore, it is possible to prevent the life of the component parts from decreasing without increasing the physique and cost.

  The selectable one-way clutch according to the present invention has been specifically described above by the embodiments for carrying out the invention. However, the gist of the present invention is not limited to these descriptions, and is based on the description of the claims. Must be interpreted widely. Needless to say, various changes and modifications based on these descriptions are also included in the spirit of the present invention.

  For example, in the SOWC 1 described above, the oil passage 12 is formed inside the pocket plate 10 and radially inward of the outer peripheral surface of the pocket plate 10, but part of the oil passage 12 is on the outer peripheral surface of the pocket plate 10. An exposed configuration or a configuration in which the oil passage 12 is entirely exposed on the outer peripheral surface of the pocket plate 10 by forming the oil passage 12 with a groove formed on the outer peripheral surface may be used.

1,101 Selectable one-way clutch (SOWC)
10,110 Pocket plate 11 Strut (engagement piece)
12 Oil passage (circumferential oil passage)
13, 113 Arm movement hole 14 Communication portion 20 Notch plate 21 Oil passage (axial oil passage)
30 Selector Plate 40 Arm 51 Stopper 52 Elastic Member 53 Seal Member 60 Actuator 160 First Actuator 161 Plunger 161a Groove 170 Second Actuator 171 Plunger F1 Restoring Force F2 Pushing Force S1, S2 Stroke Width

Claims (1)

Pocket plate,
A notch plate disposed opposite to the pocket plate and rotating coaxially with the pocket plate;
An engagement state formed between the pocket plate and the notch plate and rotating coaxially with the pocket plate and the notch plate to transmit torque between the pocket plate and the notch plate, and A selector plate that switches a non-engagement state in which torque is not transmitted between the pocket plate and the notch plate;
An arm that is inserted into an arm movement hole formed in a part of the outer periphery of the pocket plate, and one end of which is connected to the selector plate;
An actuator connected to the other end of the arm projecting from the outer periphery of the pocket plate, and rotating the selector plate via the arm;
In a selectable one-way clutch comprising
The pocket plate is
An oil passage formed in the circumferential direction;
A communication portion formed between the oil passage and the arm movement hole;
A stopper disposed in the communication portion and biased toward the oil passage;
With
The stopper is movable between the oil passage and the arm movement hole in accordance with the oil amount of the oil passage, and protrudes toward the arm movement hole side when the oil amount of the oil passage exceeds a certain level. A selectable one-way clutch that restricts movement of the arm.

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