Controllable one-way clutch

Abstract

A controllable one-way clutch is provided that includes an inner race, an outer race, a torque element, a selector, and a swing arm. The outer seat ring is sleeved on the inner seat ring, and a joint position and a separation position are arranged between the inner seat ring and the outer seat ring. The torque element can be in an engaged position such that the inner race is torsionally connected to the outer race. Moreover, the torque element can be in a disengaged position such that the inner race and the outer race can rotate relative to each other. The selector is capable of moving the torque element from the engaged position to the disengaged position by circumferential movement. A swing arm connects the selector to either the inner race or the outer race. The swing arm can swing, so that the two ends of the swing arm relatively move in the axial direction and the circumferential direction of the controllable one-way clutch in a staggered mode, and circumferential movement of the selection piece is achieved. Therefore, the controllable one-way clutch is simple in structure.

Description

Technical Field

[0001] The present application relates to the field of clutches, and more particularly to a controllable one-way clutch. Background Art

[0002] Generally, the powertrain of a hybrid vehicle adopts a wet clutch. On the one hand, the wet clutch is driven and cooled by a hydraulic system, and through the pressure connection of a hydraulic piston, the structure and control logic of the wet clutch are relatively complex. On the other hand, the wet clutch transmits torque through friction plates, and certain heat and power losses will occur during the synchronization process and connection process of the friction plates, resulting in a low energy transfer efficiency of the wet clutch.

[0003] U.S. Patent Application US20200324755A1 discloses a back-to-back selectable one-way clutch. The roller cage is provided with a plurality of windows, and each window is used to receive an inclined handle. When the selection plate slides from the deactivated position to the activated position, the inclined contact surface of the inclined handle can press against the inner circumference of the window, causing the roller cage to rotate to the disengaged state, thereby releasing the roller from the wedged position.

[0004] Chinese Patent Application CN113811704A discloses a hydrodynamic torque coupling device with a selectable one-way clutch. The actuator member is provided with an actuator edge, which is configured to engage the free distal end of the piston rod. When the secondary piston moves from the retracted position to the extended position, the tapered portion of the free distal end can press against the actuator edge, causing the actuator member to shift circumferentially, thereby moving the first roller out of the engaged position.

[0005] However, the structures of the above selectable one-way clutches are relatively complex. Summary of the Invention

[0006] In view of the state of the above prior art, the present application is made. The purpose of the present application is to provide a controllable one-way clutch, which can overcome at least one of the disadvantages described in the above background art.

[0007] To achieve the above purpose, the present application adopts the following technical solutions.

[0008] The present application provides a controllable one-way clutch as follows, including: an inner race; an outer race sleeved on the inner race, with an engagement position and a disengagement position provided between the inner race and the outer race; a torque element capable of being in the engagement position so that the inner race and the outer race are torsionally connected, and the torque element capable of being in the disengagement position so that the inner race and the outer race can rotate relative to each other; a selector capable of moving the torque element from the engagement position to the disengagement position through circumferential movement; and a swing arm connecting the selector to the inner race or the outer race, the swing arm being capable of swinging so that the two ends of the swing arm are relatively displaced axially and circumferentially in the controllable one-way clutch to achieve the circumferential movement of the selector.

[0009] In an alternative embodiment, the swing arm is capable of elastically swinging, and the selector is axially biased by the swing arm.

[0010] In another alternative embodiment, the swing arm is a leaf spring.

[0011] In another alternative embodiment, the selector includes a base and a contact portion. The base is annular, and the contact portion protrudes axially from the base. The inner race, the outer race, and the base are coaxially arranged. The swing arm is rotatably connected to the base, and the contact portion can press against the torque element towards the disengagement position.

[0012] In another alternative embodiment, the selector is connected to the outer race, and the selector can apply a component force towards the radially outer side to the torque element so that the torque element is spaced apart from the inner race in the disengagement position, or the selector is connected to the inner race, and the selector can apply a component force towards the radially inner side to the torque element so that the torque element is spaced apart from the outer race in the disengagement position.

[0013] In another alternative embodiment, the torque element is spaced apart from the selector in the disengagement position.

[0014] In another alternative embodiment, a retaining member is further included. The inner race, the outer race, and the retaining member are coaxially arranged. The retaining member is in interference fit with one of the inner race and the outer race, and the retaining member is in clearance fit with the other of the inner race and the outer race. The swing arm is rotatably connected to the retaining member, and the selector is connected to the one through the retaining member.

[0015] In another alternative embodiment, an actuator is further included. The actuator is used to drive the selector to move along the axial direction, and the swing arm can swing through the axial movement of the selector.

[0016] In another alternative solution, the selector is connected to the outer race, and the selector is fixedly or rotatably connected to the actuator, or the selector is connected to the inner race, and the selector is fixedly or rotatably connected to the actuator.

[0017] In another alternative solution, the actuator is an armature.

[0018] With the above technical solution, by providing the swing arm, the circumferential movement of the selector can be achieved through the swing of the swing arm, thereby eliminating complex structures such as inclined surfaces or tapered surfaces, and making the controllable one-way clutch have a relatively simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shows a schematic diagram of a controllable one-way clutch according to an embodiment of the present application.

[0020] Figure 2 Shows Figure 1 a schematic diagram of the controllable one-way clutch in, where the coil, the bobbin, the first iron core, and the second iron core are omitted.

[0021] Figure 3 Shows Figure 1 an exploded view of the controllable one-way clutch in.

[0022] Figure 4 Shows Figure 1 a front view of the controllable one-way clutch in, where the controllable one-way clutch is in a coupled state, and the coil, the bobbin, the first iron core, and the second iron core are omitted.

[0023] Figure 5 Shows Figure 1 a front cross-sectional view of the controllable one-way clutch in, where the controllable one-way clutch is in a coupled state.

[0024] Figure 6 Shows Figure 1 a partially enlarged view of the left view of the controllable one-way clutch in, where the controllable one-way clutch is in a coupled state.

[0025] Figure 7 Shows Figure 1 a right cross-sectional view of the controllable one-way clutch in, where the controllable one-way clutch is in a coupled state.

[0026] Figure 8 Shows Figure 1 a front view of the controllable one-way clutch in, where the controllable one-way clutch is in a decoupled state, and the coil, the bobbin, the first iron core, and the second iron core are omitted.

[0027] Figure 9 ShowsFigure 1 Front view sectional view of the controllable one-way clutch, where the controllable one-way clutch is in a decoupled state and the torque element is in a disengaged position.

[0028] Figure 10 Shows Figure 1 Partial enlarged view of the left view of the controllable one-way clutch in, where the controllable one-way clutch is in a decoupled state and the torque element is in a disengaged position.

[0029] Figure 11 Shows Figure 1 Right view sectional view of the controllable one-way clutch in, where the controllable one-way clutch is in a decoupled state.

[0030] Explanation of reference numerals

[0031] 1 Transmission assembly; 11 Inner race; 12 Outer race; 13 Torque element; 14 Biasing spring; 15 Retaining member; 15a Window; 16 Snap ring; 1a Working space;

[0032] 2 Selection assembly; 21 Selecting member; 211 Base; 212 Contact portion; 22 Swing arm; 23 Step screw;

[0033] 3 Actuating assembly; 31 Actuating member; 32 Coil; 33 Bobbin; 34 First iron core; 35 Second iron core;

[0034] A Axial; R Radial; C Circumferential. Detailed implementation manners

[0035] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, rather than to exhaust all feasible ways of the present application, nor to limit the scope of the present application.

[0036] In the present application, unless otherwise specified, "torsion-resistant connection" means a connection capable of transmitting torque.

[0037] Figures 1 to 11 Shows a controllable one-way clutch according to an embodiment of the present application.

[0038] Referring to Figure 3 , the controllable one-way clutch may include a transmission assembly 1, a selection assembly 2, and an actuating assembly 3.

[0039] The transmission component 1 may include an inner race 11, an outer race 12, a plurality of torque elements 13, a plurality of biasing springs 14, a retainer 15, and a snap ring 16. The inner race 11, the outer race 12, the retainer 15, and the snap ring 16 may be arranged coaxially. The inner race 11 and the outer race 12 may jointly define a plurality of working spaces 1a, and each working space 1a may include an engagement position and a disengaged position. One torque element 13 and one biasing spring 14 may be provided in each working space 1a, and the biasing spring 14 may bias the torque element 13 toward the engagement position. For example, in this embodiment, the torque element 13 may be a cylindrical roller, a ball, etc., and the biasing spring 14 may be a serrated elastic sheet, a helical spring, etc. The retainer 15 may be partially disposed between the inner race 11 and the outer race 12. The inner race 11 may have a clearance fit with the retainer 15, and the outer race 12 may have an interference fit with the retainer 15. The snap ring 16 may be disposed on the radially inner side of the outer race 12 and have an interference fit with the outer race 12. The torque element 13 and the biasing spring 14 may be restricted between the retainer 15 and the snap ring 16, such that the torque element 13 and the biasing spring 14 are axially limited in the axial direction A.

[0040] The selection component 2 may include a selector 21, a plurality of swing arms 22, and a plurality of stepped screws 23. The selector 21 may include a base 211 and a plurality of contact portions 212. The base 211 may be annular, and the contact portions 212 may protrude from the base 211 toward one axial side ( Figure 4 , Figure 5 , Figure 8 , Figure 9 the left side in). The retainer 15 and the selector 21 may be arranged coaxially, and the selector 21 may be sleeved on the retainer 15. For example, the selector 21 and the retainer 15 may have a clearance fit. The retainer 15 may be provided with a plurality of windows 15a, and the contact portions 212 may pass through the retainer 15 through the windows 15a. The middle portion of the swing arm 22 may extend axially while extending circumferentially along the circumferential direction C. One end of the swing arm 22 may be rotatably connected to the retainer 15 by a stepped screw 23, and the other end of the swing arm 22 may be rotatably connected to the base 211 by another stepped screw 23. The swing arm 22 may be a leaf spring (or called a blade spring, a flat spring, a drive plate), and bias the selector 21 toward the other axial side ( Figure 4 , Figure 5 , Figure 8 , Figure 9 the right side in), such that the selector 21 is connected to the outer race 12 through the swing arm 22 and the retainer 15.

[0041] The actuating assembly 3 may include an actuator 31, a coil 32, a bobbin 33, a first iron core 34, and a second iron core 35. The actuator 31, the bobbin 33, the first iron core 34, and the second iron core 35 may be coaxially arranged, and the coil 32 may be wound around the bobbin 33. The magnetically conductive actuator 31 may be sleeved on the non-magnetically conductive selector 21 and have an interference fit with the selector 21. The coil 32 is used to generate magnetic flux, and the magnetic flux may pass through the actuator 31, the first iron core 34, and the second iron core 35 to form a closed magnetic circuit. In other words, the actuating assembly 3 of this embodiment may be regarded as an electromagnetic actuator, and the actuator 31 may be an armature.

[0042] Referring to Figures 4 to 7 , the controllable one-way clutch may operate in a coupled state. In the coupled state, the contact portion 212 and the torque element 13 are spaced apart from each other. The torque element 13 may enter the engaged position such that the inner race 11 may be torsionally connected to the outer race 12 through the torque element 13. At this time, the torque element 13 is in contact with both the inner race 11 and the outer race 12. Of course, in the coupled state, the torque element 13 may also enter the disengaged position (or separation position) such that the inner race 11 and the outer race 12 can rotate relative to each other, that is, no torque is transmitted between the inner race 11 and the outer race 12. In the coupled state, the coil 32 may be in a powered-off state, such that the selector 21 and the actuator 31 are in a position farther from the inner race 11 and the outer race 12 in the axial direction A. The axial projection of the swing arm 22 may have a short circumferential length.

[0043] In other words, in this coupled state, the actuating assembly 3 may not operate, and the controllable one-way clutch may function as a one-way clutch.

[0044] Referring to Figures 8 to 11 , the controllable one-way clutch may operate in a decoupled state. In the decoupled state, the selector 21 may hold the torque element 13 in the disengaged position such that the inner race 11 and the outer race 12 can rotate relative to each other, that is, no torque is transmitted between the inner race 11 and the outer race 12. The torque element 13 may be in contact with the outer race 12 and spaced apart from the inner race 11. The contact portion 212 may press against the torque element 13 such that the torque element 13 is subjected to a circumferential component force toward the biasing spring 14 and a component force toward the radially outer side. The coil 32 may be in a powered-on state, such that the selector 21 and the actuator 31 are in a position closer to the inner race 11 and the outer race 12 in the axial direction A. The axial projection of the swing arm 22 may have a long circumferential length.

[0045] In other words, in this decoupled state, the actuating assembly 3 operates (or functions), and the controllable one-way clutch cannot lock.

[0046] The controllable one-way clutch can switch between a coupled state and a decoupled state. When it is necessary to switch from the coupled state to the decoupled state, the coil 32 can be switched from the powered-off state to the powered-on state, so that the actuator 31 drives the selector 21 to move axially to one side ( Figure 4 , Figure 5 , Figure 8 and Figure 9 the left side in). Accordingly, the swing arm 22 can swing under the drive of the selector 21, so that both ends of the swing arm 22 are relatively displaced both axially in the A direction and circumferentially in the C direction, so that the circumferential length of the axial projection of the swing arm 22 becomes longer. Under the constraint of the swing arm 22, the swing arm 22 will force the holding member 15 (outer race 12) and the selector 21 to rotate relative to each other, so that the contact portion 212 can press against the torque element 13 toward the disengaged position, thereby moving the torque element 13 from the engaged position to the disengaged position. When it is necessary to switch from the decoupled state to the coupled state, the coil 32 can be switched from the powered-on state to the powered-off state. The selector 21 and the actuator 31 can move axially to the other side ( Figure 4 , Figure 5 , Figure 8 and Figure 9 the right side in) under the biasing of the swing arm 22, and the torque element 13 can move toward the engaged position under the biasing of the biasing spring 14.

[0047] See Figure 6 , Figure 10 , a biasing spring 14 and a contact portion 212 can be respectively arranged on both circumferential sides of each torque element 13. In the coupled state, the biasing spring 14 can bias the torque element 13 to the engaged position.

[0048] In this embodiment, structures such as inclined surfaces for realizing the one-way clutch function can be formed on the inner circumferential surface of the holding member 15.

[0049] The controllable one-way clutch of this embodiment has at least the following advantages.

[0050] (i) The controllable one-way clutch has a relatively simple structure. By arranging the swing arm 22, the circumferential movement of the selector 21 can be realized by the swing of the swing arm 22, so that complex structures such as inclined surfaces or conical surfaces in the prior art can be omitted. In addition, by using an electromagnetic actuator (actuating assembly 3) instead of the existing hydraulic actuating system, the controllable one-way clutch can have a smaller volume and a higher power density, thereby further simplifying the structure of the controllable one-way clutch.

[0051] (ii) The controllable one-way clutch has high reliability. By providing the retaining member 15, the inner race 11 and the outer race 12 can be limited in the radial direction R, so that the inner race 11 and the outer race 12 can have good coaxiality. In addition, by spacing the torque element 13 from the contact portion 212 at the engaged position, the contact portion 212 is not likely to cause the torque element 13 to accidentally deviate from the engaged position due to jitter or the like, so that the controllable one-way clutch can stably transmit torque in the coupled state.

[0052] It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art can make various modifications and changes to the above embodiments under the teaching of the present application without departing from the scope of the present application.

[0053] (i) The retaining member 15 and the outer race 12 can be integrally formed, or in other words, the retaining member 15 can be omitted. At this time, structures such as the inclined surface for realizing the one-way clutch function can be formed on the inner circumferential surface of the outer race 12.

[0054] (ii) The selector 21 is not limited to being connected to the outer race 12. For example, it can be connected to the inner race 11. Further, when the selector 21 is connected to the inner race 11, the torque element 13 can be spaced from the outer race 12 at the disengaged position, and the contact portion 212 can apply a component force toward the radially inner side to the torque element 13.

[0055] (iii) The actuator 31 is not limited to being fixedly connected to the selector 21. For example, it can be rotatably connected to the selector 21. For example, the actuator 31 can be rotatably connected to the selector 21 through a thrust bearing.

[0056] (iv) The actuator 31 is not limited to being an armature. For example, it can be a piston or the like.

Claims

1. A controllable one-way clutch, characterized in that: include: Inner race (11); An outer race (12) is sleeved on the inner race (11), and an engagement position and a disengagement position are provided between the inner race (11) and the outer race (12); a torque element (13) which can be in the engaged position so that the inner race (11) is connected to the outer race (12) in a torsion-proof manner, and can be in the disengaged position so that the inner race (11) and the outer race (12) can rotate relative to each other; a selector (21) capable of moving the torque element (13) from the engaged position to the disengaged position by circumferential movement; as well as A swing arm (22) connects the selector (21) to the inner race (11) or the outer race (12), and the swing arm (22) is capable of swinging so that the two ends of the swing arm (22) are relatively displaced in the axial direction (A) and the circumferential direction (C) of the controllable one-way clutch to achieve the circumferential movement of the selector (21).

2. The controllable one-way clutch according to claim 1, characterized in that: The swing arm (22) is capable of elastically swinging, and the selection member (21) is axially biased by the swing arm (22).

3. The controllable one-way clutch according to claim 2, characterized in that: The swing arm (22) is a leaf spring.

4. The controllable one-way clutch according to any one of claims 1 to 3, characterized in that: The selection member (21) includes a base (211) and a contact portion (212); the base (211) is annular; the contact portion (212) protrudes from the base (211) to one axial side; the inner race (11), the outer race (12) and the base (211) are coaxially arranged; the swing arm (22) is rotatably connected to the base (211); and the contact portion (212) is capable of pressing the torque element (13) toward the disengaged position.

5. The controllable one-way clutch according to any one of claims 1 to 3, characterized in that: The selector (21) is connected to the outer race (12), and the selector (21) is capable of applying a component force toward the radial outside to the torque element (13), so that the torque element (13) is spaced apart from the inner race (11) in the disengaged position, or The selection member (21) is connected to the inner race (11), and the selection member (21) can apply a component force toward the radial inside to the torque element (13), so that the torque element (13) is spaced apart from the outer race (12) in the disengaged position.

6. The controllable one-way clutch according to any one of claims 1 to 3, characterized in that: The torque element (13) is spaced apart from the selector (21) in the disengaged position.

7. The controllable one-way clutch according to any one of claims 1 to 3, characterized in that: It also includes a retaining member (15), wherein the inner race (11), the outer race (12) and the retaining member (15) are coaxially arranged, the retaining member (15) is interference fit with one of the inner race (11) and the outer race (12), the retaining member (15) is clearance fit with the other of the inner race (11) and the outer race (12), the swing arm (22) is rotatably connected to the retaining member (15), and the selection member (21) is connected to the one through the retaining member (15).

8. The controllable one-way clutch according to any one of claims 1 to 3, characterized in that: It also includes an actuating member (31), wherein the actuating member (31) is used to drive the selecting member (21) to move along the axial direction (A), and the swing arm (22) can swing through the axial movement of the selecting member (21).

9. The controllable one-way clutch according to claim 8, characterized in that: The selection member (21) is connected to the outer race (12), and the selection member (21) is fixedly or rotationally connected to the actuating member (31), or The selection member (21) is connected to the inner race (11), and the selection member (21) is fixedly or rotationally connected to the actuating member (31).

10. The controllable one-way clutch according to claim 8, characterized in that: The actuating member (31) is an armature.

Images