Joint device, joint, torque transmission assembly and vehicle

Abstract

The present disclosure relates to a coupling device, a coupling piece, a torque transmission assembly and a vehicle, the coupling device comprising a first coupling piece and a second coupling piece connected with the first coupling piece, the first coupling piece comprising a first disc body provided with a first end face tooth portion, an extension line of a first addendum line of at least one first tooth intersecting an extension line of a first dedendum line at a first point; the second coupling piece comprising a second disc body provided with a second end face tooth portion, an extension line of a second addendum line of at least one second tooth intersecting an extension line of a second dedendum line at a second point; after the first coupling piece and the second coupling piece are connected with each other, the first end face tooth portion and the second end face tooth portion are tightly engaged, and the first point and the second point fall on a same virtual radial plane. The first end face tooth portion and the second end face tooth portion of the coupling device are not the same in strength, can be adapted to the strength of different assembly structures, and improve the adaptation degree of freedom of the coupling device.

Description

Technical Field

[0001] This disclosure relates to the field of torque transmission technology, and more specifically, to a coupling device, a coupling component, a torque transmission assembly, and a vehicle. Background Technology

[0002] In related technologies, the two connecting parts of the coupling device have the same structure and the same structural strength. However, the strength of the assembly structure connected to the two connecting parts is often different. Therefore, when the coupling device is connected to the assembly structure, the degree of adaptation is low, which affects the structural strength of the entire torque transmission assembly and thus affects the torque transmission. Summary of the Invention

[0003] The purpose of this disclosure is to provide a coupling device, coupling element, torque transmission assembly, and vehicle to solve the problems in the aforementioned related technologies.

[0004] To achieve the above objectives, one aspect of this disclosure provides a joining device, including a first joining member and a second joining member connected to the first joining member, the joining device having a rotation axis, wherein both the first joining member and the second joining member are rotatable about the rotation axis;

[0005] The first coupling member includes a first disc body, the first disc body is provided with a first end face tooth portion, the first end face tooth portion includes a plurality of first teeth and a first tooth groove formed between two adjacent first teeth, each first tooth has a first tooth tip line and a first tooth bottom line, and the extension line of the first tooth tip line of at least one first tooth intersects the extension line of the first tooth bottom line at a first point.

[0006] The second coupling member includes a second disc body, the second disc body is provided with a second end face tooth portion, the second end face tooth portion includes a plurality of second teeth and a second tooth groove formed between two adjacent second teeth, each second tooth has a second tooth tip line and a second tooth bottom line, and the extension line of the second tooth tip line of at least one second tooth intersects the extension line of the second tooth bottom line at a second point.

[0007] Wherein, after the first coupling member and the second coupling member are connected to each other, the first end face teeth and the second end face teeth are tightly engaged, the first point and the second point fall on the same virtual radial plane, and are distributed on the same side or different sides of the rotation axis.

[0008] Optionally, the first point falls on the circumference of the first circle, and the second point falls on the circumference of the second circle. The first circle and the second circle are set with the same center, and the radii of the first circle and the second circle are different.

[0009] Optionally, the centers of both the first circle and the second circle lie on the axis of rotation.

[0010] Optionally, the first tooth tip line and the first tooth bottom line of each first tooth intersect at a first point, each first point lies on the circumference of the same first circle, and each first point does not coincide on the circumference of the first circle.

[0011] The second tooth tip line and the second tooth bottom line of each second tooth intersect at a second point, and each second point falls on the circumference of the same second circle, and each second point does not coincide on the circumference of the second circle.

[0012] Optionally, either the first point or the second point lies on the axis of rotation.

[0013] Optionally, the first tooth tip line intersects the radial plane and has an included angle α, where 0° < α < 90°;

[0014] The second tooth bottom line intersects the radial plane and has an included angle β, where 0° < β < 90°;

[0015] The included angle α is not equal to the included angle β.

[0016] Optionally, each of the first teeth has a first tooth side line on both sides, and the extension lines of the two first tooth side lines of at least one first tooth intersect at a third point. The two first tooth side lines are symmetrically arranged with the center line of the corresponding first tooth extending in the radial direction of the first disk body as the axis of symmetry, and the first point is farther away from the corresponding first tooth than the third point.

[0017] Optionally, the third point lies in the radial plane.

[0018] Optionally, the extension of the first tooth base line passes through the third point, and the first tooth tip line crosses the third point and intersects with the first tooth base line at the first point.

[0019] Optionally, the third point lies on the axis of rotation.

[0020] Optionally, the third point does not fall on the axis of rotation, the first point falls on the circumference of the first circle, and the center of the first circle falls on the axis of rotation.

[0021] Optionally, the two lateral lines of each first tooth intersect at a third point, and each third point lies on the axis of rotation.

[0022] Optionally, each of the second teeth has a second tooth bottom line on both sides, and the extensions of the two second tooth bottom lines of at least one second tooth intersect at a fourth point, the second point coinciding with the fourth point.

[0023] Optionally, each of the first teeth includes a first tooth top surface, a first tooth bottom surface, two first tooth side surfaces, and two opposing first tooth end surfaces. The first tooth bottom surface is connected to the first disk body. One first tooth end surface is closer to the rotation axis than the other first tooth end surface. The first tooth tip line is located on the first tooth top surface, and the first tooth bottom line is located on the first tooth bottom surface. The centerline extending from the first tooth tip surface in the radial direction of the first disk body is set as the first tooth tip line, and the centerline extending from the first tooth bottom surface in the radial direction of the first disk body is set as the first tooth bottom line. The shape of the first tooth end surface is trapezoidal.

[0024] Optionally, each second tooth includes a second tooth tip surface, a second tooth bottom surface, two second tooth side surfaces, and two opposing second tooth end faces. The second tooth bottom surface is connected to the second disk body. One second tooth end face is closer to the rotation axis than the other second tooth end face. The second tooth tip line is located on the second tooth tip surface, and the second tooth bottom line is located on the second tooth bottom surface. The centerline extending from the second tooth tip surface in the radial direction of the second disk body is defined as the second tooth tip line, and the centerline extending from the second tooth bottom surface in the radial direction of the second disk body is defined as the second tooth bottom line. The shape of the second tooth end face is trapezoidal; or...

[0025] Each second tooth includes a second tooth bottom surface, two second tooth side surfaces, and two opposing second tooth end surfaces. The second tooth bottom surface is connected to the second disk body. One second tooth end surface is closer to the rotation axis than the other second tooth end surface. The tops of the two second tooth side surfaces intersect to make the shape of the second tooth end surface triangular. The intersection line of the tops of the two second tooth side surfaces is set as the second tooth tip line. The centerline extending from the second tooth bottom surface in the radial direction of the second disk body is set as the second tooth bottom line.

[0026] Optionally, each of the first teeth has a first end away from the axis of rotation and a second end close to the axis of rotation. The first tooth tip line and the first tooth bottom line both extend from the first end of the corresponding first tooth toward the second end of the first tooth. In the radial plane, the width dimension of the first end of each first tooth is greater than the width dimension of the second end of the corresponding first tooth, and the width dimension of each first tooth decreases linearly from the first end of the corresponding first tooth to the second end of the first tooth.

[0027] Each of the second teeth has a third end away from the axis of rotation and a fourth end close to the axis of rotation. The second tooth tip line and the second tooth base line both extend from the third end of the corresponding second tooth toward the fourth end of the second tooth. In the radial plane, the width dimension of the third end of each second tooth is greater than the width dimension of the fourth end of the corresponding second tooth. The width dimension of each second tooth decreases linearly from the third end of the corresponding second tooth to the fourth end of the second tooth.

[0028] A second aspect of this disclosure also provides a coupling member, including a first disc body having a rotation axis and being rotatable about the rotation axis. The first disc body is provided with a first end face tooth portion, the first end face tooth portion forming a driving engagement length in the radial direction along the rotation axis. The first end face tooth portion includes a plurality of first teeth and a first tooth groove formed between two adjacent first teeth. Each first tooth has a first tooth tip line, a first tooth bottom line, and first tooth side lines on both sides. The extension line of the first tooth tip line of at least one first tooth intersects the extension line of the first tooth bottom line at a first point, and the extension lines of the two first tooth side lines intersect at a third point. The two first tooth side lines are symmetrically arranged about the center line extending in the radial direction of the corresponding first tooth in the first disc body as an axis of symmetry. The first point is farther away from the corresponding first tooth than the third point.

[0029] Optionally, the first disk body has a virtual radial plane, and the first point and the third point fall on the radial plane.

[0030] Optionally, the third point lies on the axis of rotation.

[0031] Optionally, the extension of the first tooth base line passes through the third point, and the first tooth tip line crosses the third point and intersects with the first tooth base line at the first point.

[0032] Optionally, the third point does not fall on the axis of rotation, the first point falls on the circumference of the first circle, and the center of the first circle falls on the axis of rotation.

[0033] A third aspect of this disclosure also provides a torque transmission assembly including a drive shaft ball cage, a hub bearing, and the aforementioned coupling device, wherein the drive shaft ball cage and the hub bearing are connected, and one of a first coupling member and a second coupling member of the coupling device is connected to the drive shaft ball cage, and the other of the first coupling member and the second coupling member is connected to the hub bearing.

[0034] A fourth aspect of this disclosure also provides a vehicle including the aforementioned coupling device, or the aforementioned coupling member, or the aforementioned torque transmission assembly.

[0035] The above technical solution, by ensuring that the virtual first and second points of the first and second connecting parts do not coincide when they are connected, demonstrates that the thickness of the first tooth of the first end face tooth portion of the first connecting part along the rotation axis is different from the thickness of the second tooth of the second end face tooth portion of the second connecting part along the rotation axis. Therefore, the strengths of the first and second end face teeth are different, resulting in different structures for the first and second connecting parts. This allows them to adapt to different assembly structures with varying strengths, increasing the adaptability of the connecting device. For example, the first connecting part can be connected to an assembly structure with lower strength, while the second connecting part can be connected to an assembly structure with higher strength, thus neutralizing and increasing the strength of the resulting torque transmission assembly, thereby improving torque transmission capability and achieving high torque transmission. This connecting device, through reasonable design, improves adaptability, ensures torque transmission, reduces the strength of either the first or second connecting part, and lowers the manufacturing cost of the connecting device.

[0036] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This is a schematic diagram of the structure of a joining device according to one embodiment of the present disclosure;

[0039] Figure 2 This is a schematic diagram of the structure of the first coupling member according to one embodiment of the present disclosure;

[0040] Figure 3 This is a partial structural schematic diagram of the second coupling member according to one embodiment of the present disclosure;

[0041] Figure 4 This is a schematic diagram of the structure of the first end face tooth and the second end face tooth in an embodiment of the present disclosure when they are not engaged (the dotted lines in the figure are the indicator lines for the first point and the second point);

[0042] Figure 5 This is a schematic diagram of the structure when the first end face tooth and the second end face tooth are engaged according to one embodiment of the present disclosure (the dotted line in the figure is the indicator line of the first point and the second point);

[0043] Figure 6 This is a schematic diagram showing the positions of the first and third points of the first joint member according to one embodiment of this disclosure;

[0044] Figure 7This is a schematic diagram showing the positions of the second and fourth points of the second coupling member according to one embodiment of the present disclosure.

[0045] Explanation of reference numerals in the attached figures

[0046] 1. First connecting member; 11. First disc body; 12. First end face tooth; 13. First tooth; 131. First tooth tip line; 132. First tooth bottom line; 133. First tooth side line; 134. First tooth top surface; 135. First tooth bottom surface; 136. First tooth side surface; 137. First tooth end face; 14. First point; 15. Third point; 16. First circle;

[0047] 2. Second connecting piece; 21. Second disc body; 22. Second end face tooth; 23. Second tooth; 231. Second tooth tip line; 232. Second tooth bottom line; 235. Second tooth bottom surface; 236. Second tooth side surface; 237. Second tooth end face; 24. Second point; 25. Fourth point; 26. Second circle.

[0048] 3. Rotation axis;

[0049] 4. Radial plane. Detailed Implementation

[0050] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0051] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" are generally used to define the orientation of the accompanying drawings, and "inner" and "outer" refer to the inner and outer parts of the relevant components. Furthermore, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0053] With the rapid development of new energy vehicles, the power of motors used in these vehicles is increasing, and the torque generated by these motors is also increasing, leading to higher requirements for torque transmission, especially between the drive shaft CV joint and the wheel hub bearings.

[0054] In related technologies, the two coupling components of the coupling device have the same structure and the same structural strength. However, the strength of the assembly structure connected to the two coupling components is often different. That is, the structural strength of the drive shaft ball cage and the wheel hub bearing is different. Therefore, when the coupling device is connected to the assembly structure, the degree of adaptation is low, which affects the structural strength of the entire torque transmission assembly and thus affects the torque transmission.

[0055] Therefore, such as Figures 1-7 As shown, one aspect of this disclosure provides a joining device, including a first joining member 1 and a second joining member 2 connected to the first joining member 1. The joining device has a rotation axis 3, and both the first joining member 1 and the second joining member 2 are rotatable about the rotation axis 3.

[0056] The first connecting member 1 includes a first disc body 11, the first disc body 11 is provided with a first end face tooth portion 12, the first end face tooth portion 12 includes a plurality of first teeth 13 and a first tooth groove formed between two adjacent first teeth 13, each first tooth 13 has a first tooth tip line 131 and a first tooth bottom line 132, and the extension line of the first tooth tip line 131 of at least one first tooth 13 intersects the extension line of the first tooth bottom line 132 at a first point 14.

[0057] The second coupling member 2 includes a second disc body 21, the second disc body 21 is provided with a second end face tooth portion 22, the second end face tooth portion 22 includes a plurality of second teeth 23 and a second tooth groove formed between two adjacent second teeth 23, each second tooth 23 has a second tooth tip line 231 and a second tooth bottom line 232, and the extension line of the second tooth tip line 231 of at least one second tooth 23 intersects the extension line of the second tooth bottom line 232 at a second point 24.

[0058] Wherein, after the first connecting member 1 and the second connecting member 2 are connected to each other, the first end face tooth 12 and the second end face tooth 22 are tightly engaged, the first point 14 and the second point 24 fall on the same virtual radial plane 4, and are distributed on the same side or different sides of the rotation axis 3.

[0059] The first coupling member 1 and the second coupling member 2 are interconnected to achieve torque transmission. The first end face tooth 12 is located on one side of the first disc 11, and the second end face tooth 22 is located on one side of the second disc 21. The first end face tooth 12 and the second end face tooth 22 can mesh. Therefore, the first tooth 13 of the first end face tooth 12 can be engaged in the second tooth groove of the second end face tooth 22, and correspondingly, the second tooth 23 of the second end face tooth 22 can be engaged in the first tooth groove of the first end face tooth 12.

[0060] The plurality of first teeth 13 are arranged radially around the rotation axis 3, and the first tooth tip line 131 and the first tooth bottom line 132 of each first tooth 13 are also arranged radially around the rotation axis 3. The plurality of second teeth 23 are also arranged radially around the rotation axis 3, and the second tooth tip line 231 and the second tooth bottom line 232 of each second tooth 23 are also arranged radially around the rotation axis 3.

[0061] The first point 14 is obtained by the intersection of the extension lines of the first tooth tip line 131 and the first tooth bottom line 132 extending in the direction of the rotation axis 3, and the second point 24 is obtained by the intersection of the extension lines of the first tooth tip line 131 and the first tooth bottom line 132 extending in the direction of the rotation axis 3.

[0062] like Figure 4 and Figure 5 As shown, it should be noted that when the first connecting member 1 and the second connecting member 2 are not connected, the first point 14 and the second point 24 fall on two radial planes 4 respectively. As the first end face tooth 12 and the second end face tooth 22 mesh, the two radial planes 4 coincide, but the first point 14 and the second point 24 still do not coincide on the radial plane 4. The first point 14 and the second point 24 are virtual points, only used to illustrate the different design structures of the first tooth 13 and the second tooth 23.

[0063] In the above technical solution, by ensuring that the virtual first point 14 and second point 24 of the first connecting member 1 and the second connecting member 2 do not coincide when they are connected, it can be seen that the thickness of the first tooth 13 of the first end face tooth portion 12 of the first connecting member 1 along the rotation axis 3 is different from the thickness of the second tooth 23 of the second end face tooth portion 22 of the second connecting member 2 along the rotation axis 3. Therefore, the self-strength of the first end face tooth portion 12 and the second end face tooth portion 22 is different, resulting in different structures for the first connecting member 1 and the second connecting member 2. This allows them to adapt to the self-strength of different assembly structures, improving the adaptability of the connecting device. For example, the first connecting member 1 can be connected to an assembly structure with lower self-strength, while the second connecting member 2 can be connected to an assembly structure with higher self-strength, thus neutralizing and improving the strength of the torque transmission assembly, thereby improving the torque transmission capacity and achieving high torque transmission. This connecting device, through reasonable design, improves the adaptability and ensures torque transmission. It can reduce the self-strength of either the first connecting member 1 or the second connecting member 2, thereby reducing the manufacturing cost of the connecting device.

[0064] like Figure 6 and Figure 7As shown, in order to improve the meshing tightness between the first end face tooth 12 and the second end face tooth 22, optionally, in one embodiment of this disclosure, the first point 14 falls on the circumference of the first circle 16, and the second point 24 falls on the circumference of the second circle 26. The first circle 16 and the second circle 26 are concentric, and the radii of the first circle 16 and the second circle 26 are different. Neither the first point 14 nor the second point 24 falls on the rotation axis 3. By setting the center of the first circle 16 and the second circle 26 to the same point, making the first circle 16 and the second circle 26 concentric circles, it means that when the first end face tooth 12 and the second end face tooth 22 mesh, the fit between the first tooth 13 and the second tooth groove is high, and the fit between the second tooth 23 and the first tooth groove is high. This facilitates the interaction between the first end face tooth 12 and the second end face tooth 22, avoids the problem of mutual misalignment, and realizes torque transmission.

[0065] In addition, since the first point 14 does not fall on the rotation axis 3 and the second point 24 does not fall on the rotation axis 3, the thickness of the first tooth 13 in the direction of the rotation axis 3 and the thickness of the second tooth 23 in the direction of the rotation axis 3 are increased, which also increases the strength of the first joint 1 and the second joint 2, enabling high torque transmission.

[0066] It is understandable that the two sides of the first tooth 13 can fit tightly against the groove wall of the second tooth groove, and the two sides of the second tooth 23 can fit tightly against the groove wall of the first tooth groove, so as to ensure tight connection and realize torque transmission.

[0067] It should be noted that the first tooth 13 of the first end face tooth portion 12 and the second tooth 23 of the second end face tooth portion 22 are mainly distinguished by their different thicknesses in the direction along the rotation axis 3, and the first end face tooth portion 12 and the second end face tooth portion 22 are tightly meshed.

[0068] Alternatively, in another embodiment of this disclosure, the first point 14 falls on the circumference of the first circle 16, and the second point 24 falls on the circumference of the second circle 26. The center of the first circle 16 and the center of the second circle 26 do not coincide, and the radius of the first circle 16 and the radius of the second circle 26 may be the same or different.

[0069] In this embodiment, the first circle 16 and the second circle 26 are eccentrically arranged, so the width of the first tooth groove may be greater than the width of the second tooth 23, and the width of the second tooth groove may be greater than the width of the first tooth 13. There is a certain gap between them, which can still transmit torque.

[0070] like Figure 6 and Figure 7As shown, optionally, in one embodiment of this disclosure, the centers of the first circle 16 and the second circle 26 both fall on the rotation axis 3. This arrangement ensures that when the first connecting member 1 and the second connecting member 2 are connected, the centripetal force during their rotation is directed towards the rotation axis 3, improving the fit between the first connecting member 1 and the second connecting member 2. Simultaneously, the resulting meshing force is tangent to the circular structure of the first disc 11 or the second disc 21, facilitating torque transmission and improving torque transmission performance.

[0071] Optionally, in another embodiment of this disclosure, the centers of the first circle 16 and the second circle 26 may not fall on the rotation axis 3, and both the first circle 16 and the second circle 26 are eccentric circles relative to the rotation axis 3. Therefore, it can be understood that the thickness of a first tooth 13 or a second tooth 23 on a surface along the rotation axis 3 may be different, causing the first tooth tip line 131 or the second tooth bottom line 232 to be skewed, thus the centers of the first circle 16 and the second circle 26 do not fall on the rotation axis 3.

[0072] Optionally, in one embodiment of this disclosure, the first tooth tip line 131 and the first tooth bottom line 132 of each first tooth 13 intersect at a first point 14, and each first point 14 falls on the circumference of the same first circle 16, and each first point 14 does not coincide on the circumference of the first circle 16. This arrangement is intended to ensure that the multiple first teeth 13 are evenly distributed around the rotation axis 3, and that the thickness of each first tooth 13 is the same along the rotation axis 3. Thus, the first point 14 of each first tooth 13 falls on the circumference of the same first circle 16, which ensures balanced force on each first tooth 13, guarantees uniform torque transmission, and ensures balanced structural strength of each first tooth 13.

[0073] The second tooth tip line 231 and the second tooth bottom line 232 of each second tooth 23 intersect at a second point 24. Each second point 24 falls on the circumference of the same second circle 26, and each second point 24 does not coincide on the circumference of the second circle 26. This arrangement is to ensure that the multiple second teeth 23 are evenly distributed around the rotation axis 3, and that the thickness of each second tooth 23 is the same along the rotation axis 3. This ensures that the second point 24 of each second tooth 23 falls on the circumference of the same second circle 26, resulting in balanced force on each second tooth 23, ensuring uniform torque transmission, and maintaining balanced structural strength of each second tooth 23.

[0074] Alternatively, in another embodiment of this disclosure, the first point 14 or the second point 24 falls on the rotation axis 3. Since either the first point 14 or the second point 24 may fall on the rotation axis 3, it is possible to save manufacturing costs by simply increasing the strength of the first tooth 13 on the first coupling member 1 or the second tooth 23 on the second coupling member 2.

[0075] Optionally, in one embodiment of this disclosure, the first tooth tip line 131 intersects the radial plane 4 with an included angle α, 0° < α < 90°; the second tooth base line 232 intersects the radial plane 4 with an included angle β, 0° < β < 90°; the included angles α and β are not equal. By controlling and adjusting the included angles α and β, the inclination angle of the first tooth tip line 131 of the first tooth 13 and the inclination angle of the second tooth base line 232 of the second tooth 23 can be adjusted, so as to coordinate the strength of the first tooth 13 and the second tooth 23 and the tightness of the meshing of the first coupling member 1 and the second coupling member 2, while coordinating the processing and manufacturing complexity and manufacturing cost of the first coupling member 1 and the second coupling member 2. In some examples, 0° < α < 45°, and the included angle α can be 30°. In some examples, 0° < β < 45°, and the included angle β can be 30°.

[0076] like Figure 6 As shown, optionally, in one embodiment of this disclosure, each first tooth 13 has a first tooth side line 133 on both sides, and the extension lines of the two first tooth side lines 133 of at least one first tooth 13 intersect at a third point 15. The two first tooth side lines 133 are symmetrically arranged with the center line extending in the radial direction of the corresponding first tooth 13 as the axis of symmetry, and the first point 14 is farther away from the corresponding first tooth 13 than the third point 15.

[0077] The third point 15 is obtained by the intersection of the extended lines of the two first tooth side lines 133 extending towards the rotation axis 3. The first point 14 and the third point 15 do not coincide, and the straight-line distance between the first point 14 and the corresponding first tooth 13 is greater than the straight-line distance between the third point 15 and the corresponding first tooth 13. It should be noted that the first point 14 and the third point 15 are virtual points, only used to illustrate the design structure of the tooth.

[0078] By setting the first point 14 and the third point 15 to be non-overlapping, and making the first point 14 farther away from the first tooth 13 than the third point 15, the end of the first tooth 13 near the rotation axis 3 has a larger thickness in the direction along the rotation axis 3, which makes the first tooth 13 itself strong and has a strong load-bearing capacity, thereby enabling large torque transmission, and thus enabling the first coupling member 1 to achieve large torque kinetic energy transmission.

[0079] This arrangement ensures that the two sides of the first tooth 13 are symmetrically arranged with the center line extending in the radial direction of the first tooth 13 as the axis of symmetry. This makes it so that after the first connecting member 1 and the second connecting member 2 are connected, the forces acting on both sides of the first tooth 13 are the same, which is beneficial for balanced torque transmission.

[0080] like Figure 6As shown, optionally, in one embodiment of this disclosure, the third point 15 falls on the radial plane 4. This arrangement ensures that when the first connector 1 and the second connector 2 are connected, the centripetal force during their rotation is directed towards the rotation axis 3, thereby improving the tightness of the fit between the first connector 1 and the second connector 2.

[0081] It is understandable that the thickness of the end of the first tooth 13 away from the rotation axis 3 in the direction of the rotation axis 3 is greater than the thickness of the end of the first tooth 13 close to the rotation axis 3 in the direction of the rotation axis 3, so that the tip line 131 of the first tooth is inclined toward the first disk body 11.

[0082] like Figure 6 As shown, optionally, in one embodiment of this disclosure, the extension line of the first tooth bottom line 132 passes through the third point 15, and the first tooth top line 131 crosses the third point 15 and intersects the first tooth bottom line 132 at the first point 14. This arrangement ensures that after the first connecting member 1 and the second connecting member 2 are connected, the centripetal force during their rotation is directed towards the rotation axis 3, which can better improve the tightness of the fit between the first connecting member 1 and the second connecting member 2. It is understood that the third point 15 falls on the extension line of the first tooth bottom line 132, and both the first point 14 and the third point 15 are located on the extension line of the first tooth bottom line 132.

[0083] like Figure 6 As shown, optionally, in one embodiment of this disclosure, the third point 15 falls on the rotation axis 3. By placing the third point 15 on the rotation axis 3, the matching degree of the first coupling member 1 and the second coupling member 2 is high, the fit is tight, the torque transmission is guaranteed, and the problem of insufficient fit affecting the kinetic energy transmission is avoided.

[0084] Optionally, in one embodiment of this disclosure, the two first tooth side lines 133 of each first tooth 13 intersect at a third point 15, and each third point 15 falls on the rotation axis 3. By setting it in this way, the multiple first teeth 13 are evenly distributed around the rotation axis 3, which can make the force on each first tooth 13 balanced, ensure uniform torque transmission, and make the structural strength of each first tooth 13 balanced.

[0085] Optionally, in other embodiments, the third point 15 may not fall on the rotation axis 3, the first point 14 falls on the circumference of the first circle 16, the center of the first circle 16 falls on the rotation axis 3, the third point 15 is eccentrically set relative to the rotation axis 3, the third point 15 of each first tooth 13 is eccentrically set relative to the rotation axis 3, the third points 15 of each first tooth 13 do not coincide, and can form a virtual circle with the axis of rotation 3 as the center.

[0086] like Figure 7As shown, optionally, in one embodiment of this disclosure, each second tooth 23 has a second tooth base line 232 on both sides, and the extension lines of the two second tooth base lines 232 of at least one second tooth 23 intersect at a fourth point 25, with the second point 24 coinciding with the fourth point 25. This arrangement improves the strength of the second tooth 23 of the second coupling member 2, thereby enabling better transmission of high torque.

[0087] like Figure 2 As shown, optionally, in one embodiment of this disclosure, each first tooth 13 includes a first tooth top surface 134, a first tooth bottom surface 135, two first tooth side surfaces 136, and two opposing first tooth end surfaces 137. The first tooth bottom surface 135 is connected to the first disk body 11. One first tooth end surface 137 is closer to the rotation axis 3 than the other first tooth end surface 137. The first tooth tip line 131 is located on the first tooth top surface 134, and the first tooth bottom line 132 is located on the first tooth bottom surface 135. The centerline extending from the first tooth top surface 134 in the radial direction of the first disk body 11 is set as the first tooth tip line 131, and the centerline extending from the first tooth bottom surface 135 in the radial direction of the first disk body 11 is set as the first tooth bottom line 132. The shape of the first tooth end surface 137 is trapezoidal.

[0088] In the direction along the rotation axis 3, the first tooth top surface 134 is located above the first tooth bottom surface 135. The four sides of the first tooth top surface 134 are respectively connected to the top of the two first tooth side surfaces 136 and the two first tooth end surfaces 137. The four sides of the first tooth bottom surface 135 are respectively connected to the bottom of the two first tooth side surfaces 136 and the two first tooth end surfaces.

[0089] This arrangement helps ensure the uniformity of the thickness of the corresponding first tooth 13 at the end near the rotation axis 3 along the direction of rotation axis 3. It can be understood that the first tooth tip line 131 is the center line of the first tooth tip surface 134, and the second tooth bottom line 232 is the center line of the first tooth bottom surface 135. The first tooth tip line 131 is above the first tooth bottom line 132, therefore, the projection of the first tooth tip line 131 onto the radial plane 4 overlaps with the first tooth bottom line 132. By making the shape of the first tooth end face 137 trapezoidal, the structural strength of each tooth can be increased, improving the performance of high torque transmission.

[0090] The bottom edge lines of the two first tooth side surfaces 136 are the first tooth side lines 133. It can be understood that the bottom surface 135 of the first tooth is the same plane as the radial plane 4 in the above embodiment, and the first tooth side line 133 extends on the radial plane 4. At the same time, the bottom line 132 of the first tooth also extends on the radial plane 4, and the top line 131 of the first tooth extends above the radial plane 4 and intersects with the radial plane 4.

[0091] Optionally, in one embodiment of this disclosure, each second tooth 23 includes a second tooth top surface, a second tooth bottom surface 235, two second tooth side surfaces 236, and two opposing second tooth end surfaces 237. The second tooth bottom surface 235 is connected to the second disk body 21. One second tooth end surface 237 is closer to the rotation axis 3 than the other. The second tooth tip line 231 is located on the second tooth top surface. The centerline extending from the second tooth tip surface in the radial direction of the second disk body 21 is defined as the second tooth tip line 231. The edges of the two second tooth side surfaces 236 near the second disk body 21 are defined as the second tooth bottom lines 232. The shape of the second tooth end surface 237 is trapezoidal. That is, the second tooth 23 has a shape that is approximately the same as that of the first tooth 13, mainly reflected in the difference in thickness of the second tooth 23 in the direction along the rotation axis 3.

[0092] It should be noted that the second tooth bottom surface 235 is not on the same plane as the radial plane 4 of the above embodiment, but the second tooth tip line 231 is on the same plane as the radial plane 4 of the above embodiment, the second tooth bottom line 232 is inclined, and the second tooth bottom line 232 intersects the radial plane 4.

[0093] It is understandable that the shape of the first tooth groove is the same as the shape of the second tooth 23, so the shape of the projection of the first tooth groove on the axis of rotation 3 is trapezoidal.

[0094] like Figure 3 As shown, optionally, in another embodiment of this disclosure, each second tooth 23 includes a second tooth bottom surface 235, two second tooth side surfaces 236, and two opposing second tooth end surfaces 237. The second tooth bottom surface 235 is connected to the second disk body 21. One second tooth end surface 237 is closer to the rotation axis 3 than the other second tooth end surface 237. The tops of the two second tooth side surfaces 236 intersect, making the shape of the second tooth end surface 237 triangular. The intersection line of the tops of the two second tooth side surfaces 236 is set as the second tooth tip line 231, and the edge lines of the two second tooth side surfaces 236 near the second disk body 21 are set as the second tooth bottom line 232. With this configuration, the second tooth 23 is a tetrahedral tooth, and the self-strength of the second tooth 23 is less than that of the first tooth 13, resulting in a higher degree of freedom in the adaptation of the first coupling member 1 and the second coupling member 2, and more flexible connection and assembly.

[0095] It should be noted that the second tooth bottom surface 235 is not on the same plane as the radial plane 4 of the above embodiment, but the second tooth tip line 231 is on the same plane as the radial plane 4 of the above embodiment, the second tooth bottom line 232 is inclined, and the second tooth bottom line 232 intersects the radial plane 4.

[0096] It is understandable that the shape of the first tooth groove is the same as the shape of the second tooth 23, so the shape of the projection of the first tooth groove on the axis of rotation 3 is a triangle.

[0097] Optionally, in one embodiment of this disclosure, each first tooth 13 has a first end away from the rotation axis 3 and a second end close to the rotation axis 3. The first tooth tip line 131 and the first tooth bottom line 132 both extend from the first end of the corresponding first tooth 13 toward the second end of the first tooth 13. On the radial plane 4, the width dimension of the first end of each first tooth 13 is greater than the width dimension of the second end of the corresponding first tooth 13, and the width dimension of each first tooth 13 decreases linearly from the first end of the corresponding first tooth 13 to the second end of the first tooth 13.

[0098] Each second tooth 23 has a third end away from the rotation axis 3 and a fourth end close to the rotation axis 3. The second tooth tip line 231 and the second tooth bottom line 232 both extend from the third end of the corresponding second tooth 23 toward the fourth end of the second tooth 23. On the radial plane 4, the width dimension of the third end of each second tooth 23 is greater than the width dimension of the fourth end of the corresponding second tooth 23. The width dimension of each second tooth 23 decreases linearly from the third end of the corresponding second tooth 23 to the fourth end of the second tooth 23.

[0099] This arrangement ensures that after the first connecting member 1 and the second connecting member 2 are connected, the interaction forces of the first end face tooth 12 and the second end face tooth 22 are arranged in a cross pattern, which can improve the meshing tightness between the two and facilitate the transmission of torque.

[0100] Optionally, in one embodiment of this disclosure, the engagement device further includes a fastening component, and the first engagement member 1 and the second engagement member 2 are connected by the fastening component, so that the first engagement member 1 and the second engagement member 2 are tightly engaged.

[0101] A second aspect of this disclosure also provides a coupling member, including a first disc body 11 having a rotation axis 3 and being rotatable about the rotation axis 3. The first disc body 11 is provided with a first end face tooth portion 12, which forms a certain driving engagement length in the radial direction along the rotation axis. The first end face tooth portion 12 includes a plurality of first teeth 13 and a first tooth groove formed between two adjacent first teeth 13. Each first tooth 13 has a first tooth tip line 131, a first tooth bottom line 132, and first tooth side lines on both sides. The extension line of the first tooth tip line 131 of at least one first tooth 13 intersects the extension line of the first tooth bottom line 132 at a first point 14. The extension lines of the two first tooth side lines 133 intersect at a third point 15. The two first tooth side lines 133 are symmetrically arranged with the center line extending in the radial direction of the corresponding first tooth 13 of the first disc body 11 as the axis of symmetry. The first point 14 is farther away from the corresponding first tooth 13 than the third point 15.

[0102] A third aspect of this disclosure also provides a torque transmission assembly including a drive shaft ball cage, a hub bearing, and the aforementioned coupling device, wherein the drive shaft ball cage and the hub bearing are connected, and one of a first coupling member 1 and a second coupling member 2 of the coupling device is connected to the drive shaft ball cage, and the other of the first coupling member 1 and the second coupling member 2 is connected to the hub bearing.

[0103] The drive shaft ball cage and the wheel hub bearing are connected by connecting bolts. These bolts pass through the coupling and mating parts, creating a squeezing effect that ensures a tight meshing between the teeth on the coupling and the teeth on the mating parts, guaranteeing torque transmission. The connecting bolts are the aforementioned fastening components.

[0104] In some examples, the drive shaft CV joint has high strength, and the second coupling 2 is connected to the drive shaft CV joint. The wheel hub bearing has low strength, and the first coupling 1 is connected to the wheel hub bearing. This can balance the structural strength of the overall torque transmission assembly and facilitate the transmission of large torques.

[0105] A fourth aspect of this disclosure also provides a vehicle including the aforementioned coupling device, or the aforementioned coupling member, or the aforementioned torque transmission assembly.

[0106] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0107] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0108] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A joining device characterized by comprising: The device includes a first coupling member and a second coupling member connected to the first coupling member. The coupling device has a rotation axis, and both the first coupling member and the second coupling member are rotatable about the rotation axis. The first coupling member includes a first disc body, the first disc body is provided with a first end face tooth portion, the first end face tooth portion includes a plurality of first teeth and a first tooth groove formed between two adjacent first teeth, each first tooth has a first tooth tip line and a first tooth bottom line, and the extension line of the first tooth tip line of at least one first tooth intersects the extension line of the first tooth bottom line at a first point. The second coupling member includes a second disc body, the second disc body is provided with a second end face tooth portion, the second end face tooth portion includes a plurality of second teeth and a second tooth groove formed between two adjacent second teeth, each second tooth has a second tooth tip line and a second tooth bottom line, and the extension line of the second tooth tip line of at least one second tooth intersects the extension line of the second tooth bottom line at a second point. Wherein, after the first coupling member and the second coupling member are connected to each other, the first end face teeth and the second end face teeth are tightly engaged, the first point and the second point fall on the same virtual radial plane, and are distributed on the same side or different sides of the rotation axis. The first point falls on the circumference of the first circle, and the second point falls on the circumference of the second circle. The first circle and the second circle are set with the same center, and the radii of the first circle and the second circle are different.

2. The engagement device of claim 1, wherein The centers of both the first circle and the second circle lie on the axis of rotation.

3. The engagement device of claim 1, wherein The first tooth tip line and the first tooth bottom line of each first tooth intersect at a first point, and each first point falls on the circumference of the same first circle, and each first point does not coincide on the circumference of the first circle; The second tooth tip line and the second tooth bottom line of each second tooth intersect at a second point, and each second point falls on the circumference of the same second circle, and each second point does not coincide on the circumference of the second circle.

4. The engagement device of claim 1, wherein The first point or the second point falls on the axis of rotation.

5. The engagement device of claim 1, wherein The first tooth tip line intersects the radial plane and has an included angle α, where 0° < α < 90°; The second tooth bottom line intersects the radial plane and has an included angle β, where 0° < β < 90°; The included angle α is not equal to the included angle β.

6. The engagement device of claim 1, wherein Each of the first teeth has a first tooth side line on both sides. The extension lines of the two first tooth side lines of at least one first tooth intersect at a third point. The two first tooth side lines are symmetrically arranged with the center line of the corresponding first tooth extending in the radial direction of the first disk body as the axis of symmetry. The first point is farther away from the corresponding first tooth than the third point.

7. The engagement device of claim 6, wherein The third point lies in the radial plane.

8. The engagement device of claim 7, wherein, The extension of the first tooth base line passes through the third point, and the first tooth tip line crosses the third point and intersects with the first tooth base line at the first point.

9. The joining device according to claim 6, characterized in that, The third point lies on the axis of rotation.

10. The engagement device of claim 6, wherein, The third point does not fall on the axis of rotation, the first point falls on the circumference of the first circle, and the center of the first circle falls on the axis of rotation.

11. The engagement device of claim 6, wherein, The two lateral lines of each first tooth intersect at a third point, and each third point lies on the axis of rotation.

12. The engagement device of claim 1, wherein, Each of the second teeth has a second tooth bottom line on both sides, and the extensions of the two second tooth bottom lines of at least one second tooth intersect at a fourth point, which coincides with the fourth point.

13. The engagement device of claim 1, wherein, Each of the first teeth includes a first tooth top surface, a first tooth bottom surface, two first tooth side surfaces, and two opposing first tooth end surfaces. The first tooth bottom surface is connected to the first disk body. One first tooth end surface is closer to the rotation axis than the other first tooth end surface. The first tooth tip line is located on the first tooth top surface, and the first tooth bottom line is located on the first tooth bottom surface. The centerline extending from the first tooth tip surface in the radial direction of the first disk body is defined as the first tooth tip line, and the centerline extending from the first tooth bottom surface in the radial direction of the first disk body is defined as the first tooth bottom line. The shape of the first tooth end surface is trapezoidal.

14. The engagement device of claim 1, wherein, Each second tooth includes a second tooth top surface, a second tooth bottom surface, two second tooth side surfaces, and two opposing second tooth end surfaces. The second tooth bottom surface is connected to the second disk body. One second tooth end surface is closer to the rotation axis than the other second tooth end surface. The second tooth tip line is located on the second tooth top surface, and the second tooth bottom line is located on the second tooth bottom surface. The centerline extending from the second tooth tip surface in the radial direction of the second disk body is defined as the second tooth tip line, and the centerline extending from the second tooth bottom surface in the radial direction of the second disk body is defined as the second tooth bottom line. The shape of the second tooth end surface is trapezoidal; or... Each second tooth includes a second tooth bottom surface, two second tooth side surfaces, and two opposing second tooth end surfaces. The second tooth bottom surface is connected to the second disk body. One second tooth end surface is closer to the rotation axis than the other second tooth end surface. The tops of the two second tooth side surfaces intersect to make the shape of the second tooth end surface triangular. The intersection line of the tops of the two second tooth side surfaces is set as the second tooth tip line. The centerline extending from the second tooth bottom surface in the radial direction of the second disk body is set as the second tooth bottom line.

15. The coupling device according to any one of claims 1-14, characterized in that, Each of the first teeth has a first end away from the axis of rotation and a second end close to the axis of rotation. The first tooth tip line and the first tooth bottom line both extend from the first end of the corresponding first tooth toward the second end of the first tooth. In the radial plane, the width dimension of the first end of each first tooth is greater than the width dimension of the second end of the corresponding first tooth. The width dimension of each first tooth decreases linearly from the first end of the corresponding first tooth to the second end of the first tooth. Each of the second teeth has a third end away from the axis of rotation and a fourth end close to the axis of rotation. The second tooth tip line and the second tooth base line both extend from the third end of the corresponding second tooth toward the fourth end of the second tooth. In the radial plane, the width dimension of the third end of each second tooth is greater than the width dimension of the fourth end of the corresponding second tooth. The width dimension of each second tooth decreases linearly from the third end of the corresponding second tooth to the fourth end of the second tooth.

16. A joint, comprising: The device includes a first disc body having a rotation axis and being rotatable about the rotation axis. The first disc body is provided with a first end face tooth portion, which has a driving engagement length formed in the radial direction of the rotation axis. The first end face tooth portion includes a plurality of first teeth and a first tooth groove formed between two adjacent first teeth. Each first tooth has a first tooth tip line, a first tooth bottom line, and first tooth side lines on both sides. The extension line of the first tooth tip line of at least one first tooth intersects the extension line of the first tooth bottom line at a first point, and the extension lines of the two first tooth side lines intersect at a third point. The two first tooth side lines are symmetrically arranged about the center line extending in the radial direction of the corresponding first tooth in the first disc body as an axis of symmetry. The first point is farther away from the corresponding first tooth than the third point.

17. The joint of claim 16, wherein, The first disk has a virtual radial plane, and the first point and the third point fall on the radial plane.

18. The joint of claim 16, wherein, The third point lies on the axis of rotation.

19. The joint of claim 16, wherein, The extension of the first tooth base line passes through the third point, and the first tooth tip line crosses the third point and intersects with the first tooth base line at the first point.

20. The coupling according to claim 16, characterized in that, The third point does not fall on the axis of rotation, the first point falls on the circumference of the first circle, and the center of the first circle falls on the axis of rotation.

21. A torque transmitting assembly characterized in that, The device includes a drive shaft ball cage, a wheel hub bearing, and a coupling device as described in any one of claims 1-15, wherein the drive shaft ball cage and the wheel hub bearing are connected, and one of a first coupling member and a second coupling member of the coupling device is connected to the drive shaft ball cage, and the other of the first coupling member and the second coupling member is connected to the wheel hub bearing.

22. A vehicle characterized by It includes the coupling device as described in any one of claims 1-15, or the coupling member as described in any one of claims 16-20, or the torque transmission assembly as described in claim 21.

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