Axle system

Abstract

The invention relates to an axle system comprising a switchable one-way clutch comprising: an axle; the ratchet wheel is fixedly arranged on the shaft in a sleeving manner; the hub is arranged on the shaft in a sleeving manner; the pawl is arranged on the hub and located on the radial outer side of the ratchet wheel; the wedge-shaped plate is movably arranged on the hub in a sleeving mode in the axial direction, and the pawl and the ratchet wheel are clamped or separated through movement of the wedge-shaped plate in the axial direction; the executing mechanism is arranged on one side of the hub in the radial direction; the fork part is clamped and fixed with the wedge-shaped plate; and the executing mechanism pushes the fork part and the wedge-shaped plate to move in the axial direction. The axle system further comprises a one-way clutch arranged at one end of the shaft in the axial direction; in the radial direction, the projection of the switchable one-way clutch at least partially coincides with the projection of the one-way clutch. By integrating the one-way clutch at one end of the shaft of the switchable one-way clutch, the axial length of the whole axle system can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle transmission, and in particular to an axle system. Background Art

[0002] In current axle systems, the auxiliary drive motor can not only drive the wheels of the vehicle, but also power some other modules of the vehicle (such as the oil pump or compressor of the air conditioner) at the same time. The shafts driving the input shaft and other modules are located on both sides of the drive motor (see Figure 1 ). The drive input shaft includes a switchable one-way clutch (SOWC) that can be switched to connect or disconnect the connection between the wheel side and the motor. The one-way clutch (OWC) is located between the other modules and the drive motor to ensure that the other modules can only rotate in one direction.

[0003] In the axle system, the drive motor is axially connected to the SOWC and OWC on both sides, which makes the axle system longer and occupies more space. In addition, the solenoid valve in the axle system directly pushes the coupling mechanism, that is, pushes the wedge plate, and then pushes the pawl down onto the ratchet gear to establish the connection. The solenoid valve is usually designed as a hollow cylinder, which is circumferentially arranged on the shaft to push the wedge plate and pawl distributed along the circumference of the shaft. This will cause the weight and volume of the solenoid valve to be too large, and the cost is high. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an axle system.

[0005] An embodiment of one aspect of the present invention provides an axle system including: a switchable one-way clutch, which includes: a shaft; a ratchet fixedly mounted on the shaft; a wheel hub mounted on the shaft; a pawl disposed on the wheel hub and located radially outside the ratchet; a wedge plate movably mounted on the wheel hub in the axial direction, wherein the wedge plate engages or disengages the pawl from the ratchet by moving in the axial direction; an actuator disposed on one radial side of the wheel hub; and a fork fixedly mounted on the wedge plate; the actuator promotes the movement of the fork and the wedge plate in the axial direction. The axle system also includes: a one-way clutch disposed at one end of the shaft in the axial direction; in the radial direction, the projection of the switchable one-way clutch at least partially overlaps with the projection of the one-way clutch.

[0006] According to some embodiments of the present invention, a wedge is provided on the side of the wedge plate facing the pawl, and the side of the wedge facing the pawl has a wedge chamfered surface to convert the axial movement of the wedge plate into the radial movement of the pawl.

[0007] According to some embodiments of the present invention, the pawl comprises a pawl body and an abutment portion extending from the body; the pawl body is fixedly disposed on the wheel hub, and the abutment portion is rotatable around the body; wherein the abutment portion has a first abutment surface on the radial outer side facing the wedge plate for abutting against the wedge block; and the abutment portion has a second abutment surface on the radial inner side facing the ratchet for abutting against the ratchet.

[0008] According to some embodiments of the present invention, the radial inner side of the abutment portion further has a third abutment surface on the side facing the ratchet; in the circumferential direction, there is an angle between the third abutment surface and the second abutment surface, so that the ratchet abuts against the third abutment surface and the second abutment surface respectively when the ratchet rotates clockwise or counterclockwise.

[0009] According to some embodiments of the present invention, the abutment portion has a pawl bevel surface on the side facing the wedge plate in the axial direction, and when the wedge plate moves toward the pawl in the axial direction, the pawl bevel surface abuts and cooperates with the wedge block bevel surface, so that the wedge plate pushes the pawl to move radially inward.

[0010] According to some embodiments of the present invention, there are multiple pawls, which are evenly distributed along the circumferential direction on the wheel hub; the wedge blocks have the same number as the pawls and are evenly distributed along the circumferential direction corresponding to the pawls.

[0011] According to some embodiments of the present invention, the switchable one-way clutch further comprises a pawl spring connected between the pawl and the wheel hub, so that when the wedge plate does not push the pawl, the pawl is kept separated from the ratchet wheel by the pawl spring.

[0012] According to some embodiments of the present invention, the fork portion is arc-shaped and is clamped and fixed to the wedge-shaped plate.

[0013] According to some embodiments of the present invention, the switchable one-way clutch further comprises: a pin, which is fixed relative to the housing; and a drive spring, which is arranged between the fork and the pin in the axial direction, and the drive spring pushes the fork and the wedge plate to move in the axial direction.

[0014] According to some embodiments of the present invention, the axle system also includes: a drive motor; a wheel transmission gear; and an application module; wherein one axial end of the shaft is connected to the drive motor via a motor shaft, the other axial end of the shaft is integrated with the one-way clutch, and the one-way clutch is connected to the application module via an output shaft; the wheel hub is cooperatively connected to the wheel transmission gear.

[0015] In the axle system provided by the present invention, by providing a fork portion for the switchable one-way clutch, it is no longer necessary to specially design the actuator as a hollow cylinder sleeved on the shaft; the actuator design can be standardized to reduce the volume and weight of the actuator, saving manufacturing costs. In addition, the axle system includes a switchable one-way clutch, a one-way clutch, a drive motor, a wheel transmission gear and an application module; wherein the one-way clutch is integrated at one end of the shaft of the switchable one-way clutch, which can reduce the axial length of the entire axle system and save the space occupied by the axle system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 A partial cross-sectional view showing an axle system according to an embodiment of the present invention;

[0018] Figure 2 A perspective view showing a switchable one-way clutch according to an embodiment of the present invention;

[0019] Figure 3 A perspective view showing a pawl according to an embodiment of the present invention;

[0020] Figure 4 A perspective view showing a wedge according to an embodiment of the present invention;

[0021] Figure 5 A schematic diagram showing the cooperation between the pawl and the wedge according to an embodiment of the present invention;

[0022] Figure 6 A schematic diagram showing the cooperation between the pawl and the ratchet according to an embodiment of the present invention;

[0023] Figure 7 A schematic diagram showing the distribution of pawls and wedges on a wheel hub according to an embodiment of the present invention; and

[0024] Figure 8 A schematic structural diagram of an axle system according to an embodiment of the present invention is shown.

[0025] It should be understood that the above drawings are merely schematic and are not drawn according to actual scale. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0027] In view of the fact that the solenoid valve in the current switchable one-way clutch (SOWC) needs to be specially designed as a hollow structure and sleeved on the shaft, resulting in the problem that the solenoid valve is too heavy and large, and the cost is too high, and the axle system has a long shaft length, the present invention provides an axle system for a vehicle transmission system.

[0028] According to an embodiment of the present invention, an axle system is provided. Figure 1 A partial cross-sectional view showing an axle system according to an embodiment of the present invention; and Figure 2 A stereoscopic view of a switchable one-way clutch 1 according to an embodiment of the present invention is shown. The axle system includes a switchable one-way clutch 1 and a one-way clutch 2. The one-way clutch 2 is arranged at one end of the axial direction A of the shaft 30. In the radial direction R, the projection of the switchable one-way clutch 1 and the projection of the one-way clutch 2 at least partially overlap. That is, the one-way clutch 2 can be arranged in whole or in part inside the shaft 30. Specifically, see Figure 1 As shown, the one-way clutch 2 is disposed inside the shaft 30 and can be connected to the drive output shaft 7, thereby being able to reduce the axial length of the entire axle system.

[0029] Furthermore, combined with Figure 1 and Figure 2 As shown, the switchable one-way clutch 1 includes: a shaft 30; a ratchet 10, which is fixedly sleeved on the shaft 30; a wheel hub 20, which can be sleeved on the shaft 30 through a bearing; a pawl 40, which is arranged on the wheel hub 20 and is located on the radial outer side of the ratchet 10, and the pawl 40 is substantially coaxially arranged with the wheel hub 20; a wedge plate 50, which is movably sleeved on the wheel hub 20 along the axial direction A to convert the movement of the wedge plate 50 in the axial direction A into the movement of the pawl 40 in the radial direction R, so that the pawl 40 is engaged with or separated from the ratchet 10; an actuator 70, which is arranged on the radial side of the wheel hub 20; and a fork 80, which is engaged and fixed with the wedge plate 50; the actuator 70 pushes the fork 80 and the wedge plate 50 to move in the axial direction A; wherein the fork 80 can be arc-shaped, and is substantially coaxially arranged with the wedge plate 50 and engaged and fixed.

[0030] Specifically, the actuator 70 is a power mechanism capable of axially moving the fork 80. For example, the actuator may be a solenoid valve. The solenoid valve may be of a standardized design and arranged on one radial side of the hub 20, without the need for a special design of a hollow cylindrical sleeve on the shaft 30, which can reduce the volume of the switchable one-way clutch 1, make the structure more compact, and reduce the manufacturing cost.

[0031] like Figure 1 and 2 As shown, the switchable one-way clutch 1 is further provided with a housing 60 for protecting the various components in the switchable one-way clutch 1. The housing 60 can be sleeved on the shaft 30 through a bearing, such as a needle bearing. In addition, an actuator mounting position can be further provided on one radial side of the housing 60 for mounting and fixing the actuator 70 on the housing 60.

[0032] In some optional embodiments, Figure 3 A perspective view showing a pawl 40 according to an embodiment of the present invention; Figure 4 A perspective view showing a wedge 51 according to an embodiment of the present invention; and Figure 5 A schematic diagram showing the cooperation between the pawl and the wedge block according to an embodiment of the present invention is shown. Figure 3-5 As shown, a wedge 51 is provided on the side of the wedge plate 50 facing the pawl 40, and a wedge chamfered surface 511 is provided on the side of the wedge plate 50 facing the pawl 40. When the wedge plate 50 moves toward the pawl 40 in the axial direction A, the wedge chamfered surface 511 abuts against and pushes the pawl 40. Since the wedge chamfered surface 511 has a certain inclination angle relative to both the axial direction A and the radial direction R, the movement of the wedge plate 50 in the axial direction A can be converted into the movement of the pawl 40 in the radial direction R. That is, when the wedge plate 50 moves toward the pawl 40 in the axial direction A, the wedge plate 50 can push the pawl 40 toward the radial inside, so that the pawl 40 is engaged with the ratchet 10. Through the engagement of the pawl 40 with the ratchet 10, the shaft 30 can drive the wheel hub 20 to rotate, and then drive the wheel transmission gear 4 connected to the wheel hub 20 to rotate. When the wedge plate 50 moves away from the pawl 40 in the axial direction A, the pawl 40 can return to its original position radially outward, separate from the ratchet wheel 10 , and stop driving the wheel transmission gear 4 .

[0033] like Figure 3-5As shown, the pawl 40 comprises a pawl body portion 41 and an abutment portion 42 extending from the body portion; the pawl body portion 41 is fixedly disposed on the wheel hub 20, and the abutment portion 42 is rotatable around the body portion 41, so that the abutment portion 42 can move in the radial direction R. The abutment portion 42 has a first abutment surface 421 on the radial outer side facing the wedge plate 50, which is used to abut against the wedge block 51; the abutment portion 42 has a second abutment surface 422 on the radial inner side facing the ratchet 10, which is used to abut against the ratchet 10.

[0034] In some optional embodiments, the radial inner side of the abutment portion 42 further has a third abutment surface 423 on the side facing the ratchet 10, and in the circumferential direction C, there is an angle between the third abutment surface 423 and the second abutment surface 422, so that the ratchet 10 abuts against the third abutment surface 423 and the second abutment surface 422 respectively when rotating clockwise or counterclockwise.

[0035] Specifically, Figure 6 FIG. 2 is a schematic diagram showing the cooperation between the pawl and the ratchet according to an embodiment of the present invention. Figure 6 As shown, the radial outer side of the ratchet 10 is provided with a plurality of gear teeth that abut against the pawl 40. The pawl 40 is separated from the ratchet 10 in the reset state, and the ratchet 10 is not engaged with the wheel hub 20. When the wedge plate 50 moves toward the pawl 40 in the axial direction A, the pawl 40 rotates toward the radial inner side, and the abutting portion 42 abuts against the gear teeth of the ratchet 10, and the ratchet 10 is engaged with the wheel hub 20. Figure 6 As shown in , in the engaged state, when the ratchet 10 rotates clockwise, the teeth of the ratchet 10 abut against the third abutment surface 423 to drive the wheel hub 20 to rotate clockwise; when the ratchet 10 rotates counterclockwise, the teeth of the ratchet 10 abut against the second abutment surface 422 to drive the wheel hub 20 to rotate counterclockwise.

[0036] In some optional embodiments, see Figure 3-5 As shown, in order to make the relative movement between the pawl 40 and the wedge block 51 of the wedge plate 50 more smooth, the abutment portion 42 further has a pawl chamfered surface 424 on the side facing the wedge plate 50 in the axial direction A. When the wedge plate 50 moves toward the pawl 40 in the axial direction A, the pawl chamfered surface 424 abuts and cooperates with the wedge block chamfered surface 511, so that the wedge plate 50 can push the pawl 40 to move radially inward more smoothly.

[0037] Further, Figure 7FIG. 4 is a schematic diagram showing the distribution of the pawl 40 and the wedge 51 on the wheel hub 20 according to an embodiment of the present invention. Figure 7 As shown, in some optional embodiments, there are a plurality of ratchet pawls 40, which are evenly distributed on the wheel hub 20 along the circumferential direction C; the wedge blocks 51 have the same number as the ratchet pawls 40, and are evenly distributed along the circumferential direction C corresponding to the ratchet pawls 40. In this way, the ratchet 10 is subjected to uniform force in the circumferential direction C during the process of engaging and disengaging with the wheel hub 20.

[0038] like Figure 6 As shown, the switchable one-way clutch also includes a pawl spring 130, which is connected between the pawl 40 and the hub 20, so that when the wedge plate 50 does not push the abutment portion 42 of the pawl 40 to rotate radially inward, the abutment portion 42 can be rotated radially outward through the pawl spring 130, so that the abutment portion 42 returns to its original position and is separated from the ratchet 10.

[0039] In some optional embodiments, see Figure 1-2 As shown, the switchable one-way clutch further includes: a pin 90 fixed relative to the housing 60; and a drive spring 100 disposed between the fork 80 and the pin 90 along the axial direction A. The drive spring 100 can drive the fork 80 and the wedge plate 50 fixedly engaged with the fork 80 to move toward the pawl 40 in the axial direction A. Figure 1 In the embodiment, the driving spring 100 drives the fork 80 and the wedge plate 50 to move to the left, and keeps the pawl 40 and the ratchet 10 in an engaged state. The pawl 40 and the ratchet 10 are separated by the actuator 70 driving the fork 80 and the wedge plate 50 to move away from the pawl 40, that is, to the right.

[0040] In some optional embodiments, the axle system further includes: a drive motor 3; a wheel transmission gear 4; and an application module 5. Among them, one axial end of the shaft 30 can be connected to the drive motor 3 through the motor shaft 6, for example, by spline, and the other axial end of the shaft 30 is integrated with the one-way clutch 2, and the one-way clutch 2 is connected to the application module 5 through the output shaft 7; the wheel hub 20 is connected to the wheel transmission gear 4, for example, by spline matching. The application module 5 can be an oil pump or compressor of an air conditioner, etc. The drive motor 3 drives the output shaft 7 through the one-way clutch 2 integrated on the switchable one-way clutch 1 to provide power for the oil pump, compressor or other application modules of the air conditioner.

[0041] By integrating the one-way clutch 2 at one end of the shaft 30 of the switchable one-way clutch 1, and the projection of the switchable one-way clutch 1 in the radial direction R at least partially overlaps with the projection of the one-way clutch 2 in the radial direction R, the axial length of the entire axle system can be reduced.

[0042] Although possible embodiments are described by way of example in the above description, it should be understood that there are still a large number of variations of embodiments through the combination of all known and other technical features and embodiments that are easily conceivable to the skilled person. It should also be understood that the exemplary embodiment is only an example and that such an embodiment in no way limits the scope of protection, application and configuration of the present invention. The above description is more to provide the skilled person with a technical guide for converting at least one exemplary embodiment, wherein various changes can be made, especially changes in the functions and structures of the components, as long as they do not depart from the scope of protection of the claims.

Claims

1. An axle system, characterized in that: include: A switchable one-way clutch (1) comprising: Axis (30); A ratchet (10) fixedly sleeved on the shaft (30); A wheel hub (20) sleeved on the shaft (30); a ratchet pawl (40) disposed on the wheel hub (20) and located radially outside the ratchet wheel (10); a wedge plate (50) which is movably sleeved on the wheel hub (20) along the axial direction (A), wherein the wedge plate (50) causes the pawl (40) to engage with or separate from the ratchet wheel (10) by moving along the axial direction (A); an actuator (70) disposed on one radial side of the hub (20); and a fork portion (80) which is fixedly engaged with the wedge plate (50); the actuator (70) drives the fork portion (80) and the wedge plate (50) to move in the axial direction (A); and A one-way clutch (2) is arranged at one end of the shaft (30) in the axial direction (A); in the radial direction (R), the projection of the switchable one-way clutch (1) at least partially overlaps with the projection of the one-way clutch (2).

2. The axle system according to claim 1, characterized in that: A wedge block (51) is provided on the side of the wedge plate (50) facing the pawl (40), and a wedge block chamfer (511) is provided on the side of the wedge block (51) facing the pawl (40) so as to convert the movement of the wedge plate (50) in the axial direction (A) into the movement of the pawl (40) in the radial direction (R).

3. The axle system according to claim 2, characterized in that: The pawl (40) comprises a pawl body (41) and an abutment portion (42) extending from the body; the pawl body (41) is fixedly arranged on the wheel hub (20), and the abutment portion (42) is rotatable around the body (41); The abutment portion (42) has a first abutment surface (421) on its radial outer side facing the wedge plate (50) for abutting against the wedge block (51); and the abutment portion (42) has a second abutment surface (422) on its radial inner side facing the ratchet (10) for abutting against the ratchet (10).

4. The axle system according to claim 3, characterized in that: The radial inner side of the abutment portion (42) also has a third abutment surface (423) on the side facing the ratchet (10); in the circumferential direction (C), there is an angle between the third abutment surface (423) and the second abutment surface (422), so that the ratchet (10) abuts against the third abutment surface (423) and the second abutment surface (422) respectively when rotating clockwise or counterclockwise.

5. The axle system according to claim 3, characterized in that: The abutment portion (42) has a pawl bevel surface (424) on the side facing the wedge plate (50) in the axial direction (A); when the wedge plate (50) moves toward the pawl (40) in the axial direction (A), the pawl bevel surface (424) abuts and cooperates with the wedge block bevel surface (511), so that the wedge plate (50) pushes the pawl (40) to move radially inward.

6. The axle system according to claim 2, characterized in that: The ratchet pawls (40) are provided in plurality and are evenly distributed on the wheel hub (20) along a circumferential direction (C); the wedge blocks (51) are provided in the same number as the ratchet pawls (40) and are evenly distributed along the circumferential direction (C) corresponding to the ratchet pawls (40).

7. The axle system according to claim 1, characterized in that: The switchable one-way clutch (1) further comprises a pawl spring (130) connected between the pawl (40) and the wheel hub (20), so that when the wedge plate (50) does not push the pawl (40), the pawl (40) is kept separated from the ratchet wheel (10) by the pawl spring (130).

8. The axle system according to claim 1, characterized in that: The fork portion (80) is arc-shaped and is clamped and fixed to the wedge plate (50).

9. The axle system according to claim 1, characterized in that: The switchable one-way clutch also includes: a pin (90) fixed relative to the housing (60); and A driving spring (100) is arranged between the fork (80) and the pin (90) in the axial direction (A), and the driving spring (100) pushes the fork (80) and the wedge plate (50) to move in the axial direction (A).

10. The axle system according to claim 1, characterized in that Also includes: Drive motor (3); Wheel drive gear (4); as well as Application module (5); One axial end of the shaft (30) is connected to the drive motor (3) via a motor shaft (6), the other axial end of the shaft (30) is integrated with the one-way clutch (2), and the one-way clutch (2) is connected to the application module (5) via an output shaft (7); the wheel hub (20) is cooperatively connected to the wheel transmission gear (4).

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