Torque-transmitting coupling, coupling device, torque-transmitting assembly, and vehicle

Abstract

The present disclosure relates to a torque transmission engagement, an engagement device, a torque transmission assembly and a vehicle. The engagement device comprises a first disc body provided with a first end face tooth portion, the first end face tooth portion comprising a plurality of first teeth, each of the first teeth having a first line at a top portion, a second line at a bottom portion, and a third line at each side, and an extension line of the first line and an extension line of the second line of at least one of the first teeth intersecting at a first point, and extension lines of the two third lines of at least one of the first teeth intersecting at a second point, the first point being closer to the corresponding first tooth than the second point. The engagement device is light in weight and can meet the demand of light weight.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of face gear, in particular to a torque transmission engagement, engagement device, torque transmission assembly and vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicles, in order to improve the endurance of new energy vehicles, the demand for lightweight of new energy vehicles is getting higher and higher.

[0003] The weight of the torque transmission engagement in the related art is large, which does not meet the demand for lightweight of new energy vehicles. SUMMARY

[0004] The purpose of the present disclosure is to provide a torque transmission engagement, engagement device, torque transmission assembly and vehicle to solve the above problems in the related art.

[0005] In order to achieve the above purpose, one aspect of the present disclosure provides a torque transmission engagement, the engagement comprising a first disc body, the first disc body having a rotation axis, the first disc body being capable of rotating about the rotation axis, the first disc body being provided with a first face gear part, the first face gear part being configured to mesh with a mating part connected to the engagement to transmit torque.

[0006] The first face gear part comprises a plurality of first teeth, each first tooth having a first line at the top, each first tooth having a second line at the bottom, each first tooth having a third line at both sides, each first tooth having a first end away from the rotation axis and a second end close to the rotation axis, the first line, the second line and the third line extending in the direction from the first end of the corresponding first tooth to the second end of the first tooth.

[0007] The extension line of the first line and the extension line of the second line of at least one first tooth intersect at a first point, the extension lines of the two third lines of the first tooth intersect at a second point, and the first point is closer to the corresponding first tooth than the second point.

[0008] Optionally, the engagement has a virtual radial plane, and the first point and the second point are located on the radial plane; or,

[0009] The engagement has two virtual radial planes, and the first point and the second point fall on the two radial planes respectively.

[0010] Optionally, the angle between the first line and the radial plane is α, 0°<α<90°.

[0011] Optionally, the first point is closer to the corresponding first tooth than the rotation axis; and / or,

[0012] the second point is closer to the corresponding first tooth than the rotation axis.

[0013] Optionally, the extension of the second line intersects the rotation axis; and / or,

[0014] The two third lines are symmetrically arranged with respect to a middle line of the corresponding first tooth extending in the radial direction of the first disc body, and the extension of the middle line intersects the rotation axis.

[0015] Optionally, the first point falls on the circumference of a first circle, and the center of the first circle falls on the rotation axis.

[0016] Optionally, the first line and the second line of each first tooth intersect at a first point, 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.

[0017] Optionally, the second point falls on the rotation axis.

[0018] Optionally, the second point falls on the circumference of a second circle, the center of the second circle falls on the rotation axis, and the radius of the second circle is smaller than the radius of the first circle.

[0019] Optionally, the two third lines of each first tooth intersect at a second point;

[0020] wherein each second point falls on the rotation axis; or,

[0021] 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.

[0022] Optionally, each first tooth comprises a first tooth top surface, a first tooth bottom surface, two first tooth side surfaces, and two oppositely arranged first tooth end surfaces, the first tooth bottom surface is connected with the first disc body, one first tooth end surface is closer to the rotation axis than the other first tooth end surface, the first line is arranged as a first tooth top line of the first tooth top surface, the second line is arranged as a first tooth bottom line of the first tooth bottom surface, and the bottom edge line of the two first tooth side surfaces is arranged as the third line.

[0023] Optionally, the middle line of the first tooth top surface extending in the radial direction of the first disc body is arranged as the first line, and the middle line of the first tooth bottom surface extending in the radial direction of the first disc body is arranged as the second line.

[0024] Optionally, the first addendum surface is arranged as a planar structure or a curved surface structure.

[0025] Optionally, each of the first teeth comprises a first tooth bottom surface, two first tooth side surfaces, and two oppositely arranged first tooth end surfaces, the first tooth bottom surface is connected with the first disc body, one of the first tooth end surfaces is closer to the rotation axis than the other first tooth end surface, the top of the two first tooth side surfaces intersects, so that the shape of the first tooth end surface is triangular, the intersection line of the top of the two first tooth side surfaces is arranged as the first line, the middle line of the first tooth bottom surface extending in the radial direction of the first disc body is arranged as the second line, and the bottom edge line of the two first tooth side surfaces is arranged as the third line.

[0026] Optionally, in a radial plane, the width dimension of the first end of each of the first teeth is greater than the width dimension of the second end of the corresponding first tooth, and the width dimension of each of the first teeth linearly decreases from the first end of the corresponding first tooth to the second end of the first tooth.

[0027] Optionally, the first end surface tooth portion further comprises a first tooth groove between the two adjacent first teeth, and the projection of the first tooth groove towards the rotation axis is triangular.

[0028] The second aspect of the present disclosure further provides a joint device comprising a fastening component, a matching piece, and the above-mentioned torque transmission joint piece, the matching piece and the joint piece are both connected with the fastening component, and the fastening component is arranged to be capable of tightly engaging the matching piece and the joint piece.

[0029] Optionally, the matching piece comprises a second disc body, the second disc body is capable of rotating around the rotation axis, the second disc body is provided with a second end surface tooth portion, and the second end surface tooth portion is arranged to be capable of engaging with the first end surface tooth portion of the joint piece to transmit torque.

[0030] The second end surface tooth portion comprises a plurality of second teeth, each of the second teeth has a second tooth side line on both sides, the extension lines of the two second tooth side lines of at least one of the second teeth intersect at a fourth point, and the fourth point falls on the rotation axis.

[0031] Optionally, each of the second teeth has a second tooth top line and a second tooth bottom line.

[0032] The extension line of the second tooth top line of at least one of the second teeth intersects with the extension line of the second tooth bottom line at a third point through the rotation axis, and the third point does not fall on the rotation axis.

[0033] Optionally, an extension line of the second addendum line of at least one of the second teeth intersects the rotation axis, and the third point is on a circumference of a third circle, and a center of the third circle is on the rotation axis.

[0034] Optionally, an extension line of the second addendum line of at least one of the second teeth intersects an extension line of the second dedendum line at a third point, and the third point is on the rotation axis and coincides with the fourth point.

[0035] Optionally, each of the second teeth comprises a second addendum surface and two oppositely arranged second tooth end surfaces, one of the second tooth end surfaces is closer to the rotation axis than the other second tooth end surface, and the second tooth end surface is in a trapezoidal shape; or,

[0036] Each of the second teeth further comprises two oppositely arranged second tooth end surfaces, one of the second tooth end surfaces is closer to the rotation axis than the other second tooth end surface, and the top of the two second tooth side surfaces intersects, so that the second tooth end surface is in a triangular shape.

[0037] Optionally, each of the second teeth further comprises a second dedendum surface and two second tooth side surfaces, the second dedendum surface is connected to the second disc body, and the two second tooth side surfaces are both concave, so that the two second tooth side surfaces are in an arc surface structure.

[0038] The third aspect of the present disclosure further provides a torque transmission assembly, comprising a drive shaft cage, a hub bearing, and the engagement device described above, the drive shaft cage is connected to the hub bearing, and one of the matching part and the engaging part of the engagement device is connected to the drive shaft cage, and the other of the matching part and the engaging part is connected to the hub bearing.

[0039] The fourth aspect of the present disclosure further provides a vehicle, comprising the torque transmission engaging part described above, or the engagement device described above, or the torque transmission assembly described above.

[0040] The above technical solution, by setting the first point and the second point not to coincide, and making the first point closer to the corresponding first tooth than the second point, so that the second end of the first tooth has a smaller thickness in the direction along the rotation axis, thereby reducing the weight of the first tooth, and further reducing the weight of the entire engagement device, can meet the torque transmission and the demand for light weight of new energy vehicles, and improve the endurance of new energy vehicles.

[0041] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, illustrate the present disclosure and, together with the specific embodiments described below, serve to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0043] Figure 1 is a position diagram of the first point and the second point of the joint of an embodiment of the present disclosure;

[0044] Figure 2 is a structural diagram of the joint of an embodiment of the present disclosure;

[0045] Figure 3 is a position diagram of the third point and the fourth point of the fitting of an embodiment of the present disclosure;

[0046] Figure 4 is a structural diagram of the second tooth of an embodiment of the present disclosure.

[0047] Explanation of Reference Signs

[0048] 11, first disc body, 12, first end surface tooth portion, 13, first tooth, 131, first line, 132, second line, 133, third line, 134, first tooth top surface, 135, first tooth bottom surface, 136, first tooth side surface, 137, first tooth end surface, 14, first point, 15, second point, 16, first circle, 17, first tooth groove, 18, second circle;

[0049] 3, rotation axis;

[0050] 4, radial plane;

[0051] 53, second tooth, 531, second tooth top line, 532, second tooth bottom line, 533, second tooth side line, 536, second tooth side surface, 537, second tooth end surface, 54, third point, 55, fourth point, 56, third circle. DETAILED DESCRIPTION

[0052] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0053] In the present disclosure, the orientation words such as "up, down, left, right" used without the opposite description are generally defined as the direction of the drawing surface, and "inner, outer" refers to the inner and outer of the related parts. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present disclosure, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be directly connected, or indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0055] As Figure 1 and Figure 2 An aspect of the present disclosure provides a torque transmission joint, the joint comprising a first disc body 11, the first disc body 11 having an axis of rotation 3, the first disc body 11 being rotatable about the axis of rotation 3, the first disc body 11 being provided with a first face gear 12 configured to engage with a mating member connectable to the joint to transmit torque.

[0056] The first face gear 12 comprises a plurality of first teeth 13, each first tooth 13 having a first line 131 at the top, a second line 132 at the bottom, and a third line 133 at each side, each first tooth 13 having a first end away from the axis of rotation 3 and a second end close to the axis of rotation 3, the first line 131, the second line 132 and the third line 133 extending along the first end of the corresponding first tooth 13 towards the second end of the first tooth 13.

[0057] The extension of the first line 131 and the extension of the second line 132 of at least one first tooth 13 intersect at a first point 14, the extensions of the two third lines 133 of the first tooth 13 intersect at a second point 15, the first point 14 being closer to the corresponding first tooth 13 than the second point 15.

[0058] Wherein the first face gear 12 is located on one side of the first disc body 11, the joint and the mating member are engaged through the first face gear 12 and a second face gear on the mating member to achieve torque transmission.

[0059] Wherein the plurality of first teeth 13 are arranged radially around the axis of rotation 3, and the first line 131, the second line 132 and the third line 133 of each first tooth 13 are also arranged radially around the axis of rotation 3.

[0060] As Figure 1As shown, the first point 14 is obtained by the intersection of the extension line of the first line 131 extending towards the rotation axis 3 and the extension line of the second line 132 extending towards the rotation axis 3, and the second point 15 is obtained by the intersection of the extension lines of the two third lines 133 extending towards the rotation axis 3, the first point 14 and the second point 15 are not coincident, and the straight line distance between the first point 14 and the corresponding first tooth 13 is less than the straight line distance between the second point 15 and the corresponding first tooth 13. It should be noted that the first point 14 and the second point 15 are virtual points, which are only used to reflect the design structure of the first tooth 13.

[0061] In the above technical solution, by setting the first point 14 and the second point 15 not to be coincident, and making the first point 14 closer to the corresponding first tooth 13 than the second point 15, the thickness of the second end of the first tooth 13 in the direction of the rotation axis is small, thereby reducing the weight of the first tooth 13, and further reducing the weight of the entire joint, which can meet the torque transmission and the demand of light weight of the new energy vehicle, and improve the endurance of the new energy vehicle.

[0062] As shown in the figure, Figure 1 Optionally, in one embodiment of the present disclosure, the joint has a virtual radial plane 4, and the first point 14 and the second point 15 are located on the radial plane 4. By such a setting, when the joint and the cooperating piece are connected, the centripetal force when the two rotate is towards the rotation axis 3, so as to improve the tightness of the joint and the cooperating piece.

[0063] It can be understood that the thickness of the first end of the first tooth 13 in the direction of the rotation axis 3 is greater than the thickness of the second end of the first tooth 13 in the direction of the rotation axis 3, so the first line 131 is inclined towards the first disc body 11.

[0064] Optionally, in another embodiment of the present disclosure, the joint has two virtual radial planes 4, and the first point 14 and the second point 15 are located on the two radial planes 4, respectively, and the two radial planes 4 are arranged in the direction of the rotation axis 3.

[0065] In some examples, in the direction of the rotation axis 3, the first point 14 is located above the second point 15. This can be achieved by the thickness of the first end of the first tooth 13 in the direction of the rotation axis 3 being less than the thickness of the second end of the first tooth 13 in the direction of the rotation axis 3, or the third line 133 is inclined from the top of the first end of the first tooth 13 to the bottom of the second end of the first tooth 13.

[0066] In other examples, in the direction of the rotation axis 3, the first point 14 is located below the second point 15, so the third line 133 is inclined from the bottom of the first end of the first tooth 13 to the top of the second end of the first tooth 13.

[0067] Optionally, in an embodiment of the present disclosure, the first line 131 forms an angle a with the radial plane 4, 0° < a < 90°. By so arranging, the thickness relationship of the first end of the first tooth 13 and the second end of the first tooth 13 in the direction along the rotation axis 3 can be adjusted, so as to coordinate the strength of the first tooth 13 itself, the tightness when the engaging member engages with the mating member, and the complexity and cost of manufacturing the engaging member.

[0068] It can be understood that by controlling the size of the angle a, the inclination of the first line 131 can be controlled, and then the straight-line distance of the first point 14 corresponding to the first tooth 13 can be controlled, so as to control the thickness of the second end of the first tooth 13 in the direction along the rotation axis 3. In some examples, 45° < a < 90°, and the angle a can be 60°.

[0069] Optionally, in an embodiment of the present disclosure, the first point 14 is closer to the corresponding first tooth 13 than the rotation axis 3.

[0070] In some examples, the first line 131 is arranged to be inclined from the top of the first end of the first tooth 13 to the bottom of the second end of the first tooth 13, and the second line 132 is arranged to be inclined from the bottom of the first end of the first tooth 13 to the top of the second end of the first tooth 13, so that the intersection of the first line 131 and the second line 132, that is, the first point 14, is closer to the first tooth 13 than the rotation axis 3. That is, the first point 14 does not cross the rotation axis 3.

[0071] Optionally, in an embodiment of the present disclosure, the first point 14 is closer to the corresponding first tooth 13 than the rotation axis 3, and the second point 15 is closer to the corresponding first tooth 13 than the rotation axis 3.

[0072] In some examples, the first line 131 is arranged to be inclined from the top of the first end of the first tooth 13 to the bottom of the second end of the first tooth 13, and the second line 132 is arranged to be inclined from the bottom of the first end of the first tooth 13 to the top of the second end of the first tooth 13, so that the intersection of the first line 131 and the second line 132, that is, the first point 14, is closer to the first tooth 13 than the rotation axis 3. Similarly, the third line 133 is inclined from the bottom of the first end of the first tooth 13 to the top of the second end of the first tooth 13. That is, the first point 14 and the second point 15 do not cross the rotation axis 3, and are between the rotation axis 3 and the corresponding first tooth 13.

[0073] As Figure 1As shown, optionally, in one embodiment of the present disclosure, the first point 14 falls on the circumference of a first circle 16, and the center of the first circle 16 falls on the rotation axis 3. By so arranging, when the engaging member and the mating member are connected, the mutual engagement force generated by the rotation of the two members is tangent to the circular structure of the first disc body 11, which is conducive to the transmission of torque. It can be understood that the first circle 16 is sleeved on the rotation axis 3, and the first circle 16 is coaxially arranged with the first disc body 11.

[0074] Optionally, in other embodiments, the center of the first circle 16 can not fall on the rotation axis 3, so that the first circle 16 is an eccentric circle. Therefore, it can be understood that the thickness of the second end of a first tooth 13 in the direction along the rotation axis 3 can be different, so that the first line 131 is inclined, and the first point 14 where the first line 131 intersects with the second line 132 is on the circumference of the eccentric circle.

[0075] Optionally, in one embodiment of the present disclosure, the first line 131 and the second line 132 of each first tooth 13 intersect at a first point 14, 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. The arrangement is to uniformly distribute the plurality of first teeth 13 around the rotation axis 3, and the thickness of the second end of each first tooth 13 in the direction along the rotation axis 3 is the same. Thus, the first point 14 of each first tooth 13 falls on the circumference of the same first circle 16, so that the stress of each first tooth 13 is balanced, the uniform transmission of torque is ensured, and the structural strength of each first tooth 13 is balanced.

[0076] Optionally, in another embodiment of the present disclosure, each first tooth 13 has a first line 131 and a second line 132, the first line 131 and the second line 132 of each first tooth 13 intersect at a first point 14, and each first point 14 can not fall on the circumference of the same first circle 16. It can be understood that when the thickness of the second end of each first tooth 13 in the direction along the rotation axis 3 is different, the inclination angle of the first line 131 of each first tooth 13 is different, so that the falling point of the first point 14 is different. It should be noted that different first points 14 can or can not coincide.

[0077] As shown, optionally, in one embodiment of the present disclosure, the first point 14 falls on the circumference of a first circle 16, and the center of the first circle 16 falls on the rotation axis 3. By so arranging, when the engaging member and the mating member are connected, the mutual engagement force generated by the rotation of the two members is tangent to the circular structure of the first disc body 11, which is conducive to the transmission of torque. It can be understood that the first circle 16 is sleeved on the rotation axis 3, and the first circle 16 is coaxially arranged with the first disc body 11. Figure 1As shown, optionally, in one embodiment of this disclosure, the extension line of the second line 132 intersects the rotation axis 3. This arrangement ensures that the first tooth 13 of the first end face tooth portion 12 faces the rotation axis 3 directly, rather than being tilted when viewed from the direction directly opposite the first end face tooth portion 12. This ensures that after the first end face tooth portion 12 of the connector engages with the second end face tooth portion of the mating member, the centripetal force during their rotation is directed towards the rotation axis 3, thus improving the tightness of the fit between the connector and the mating member.

[0078] In some examples, the second point 15 may fall on the extension of the second line 132.

[0079] like Figure 1 As shown, optionally, in one embodiment of this disclosure, the two third lines 133 are symmetrically arranged with respect to the centerline extending in the radial direction of the corresponding first tooth 13 of the first disc 11 as the axis of symmetry, and the extension of the centerline intersects the rotation axis 3. This arrangement ensures that the first tooth 13 of the first end face tooth portion 12 is a tooth structure facing the rotation axis 3, rather than being tilted when viewed directly from the first end face tooth portion 12. Simultaneously, it allows the two sides of the first tooth 13 to be symmetrically arranged with respect to the centerline extending in the radial direction of the corresponding first tooth 13 as the axis of symmetry, ensuring that after the connecting member and the mating member are connected, the forces acting on both sides of the first tooth 13 are the same, facilitating balanced torque transmission.

[0080] Optionally, in one embodiment of this disclosure, the second point 15 falls on the rotation axis 3. By setting the coupling member in this way, with the second point 15 falling on the rotation axis 3, the matching degree between the coupling member and the mating member is high, the fit is tight, the torque transmission is guaranteed, and the problem of insufficient fit affecting the kinetic energy transmission is avoided.

[0081] Optionally, in one embodiment of this disclosure, the two third lines 133 of each first tooth 13 intersect at a second point 15, and each second 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.

[0082] Alternatively, in another embodiment of this disclosure, the second point 15 falls on the circumference of a second circle 18, the center of the second circle 18 lies on the rotation axis 3, and the radius of the second circle 18 is smaller than the radius of the first circle 16.

[0083] This configuration ensures that the engagement and mating parts can generate a centripetal force towards the rotation axis 3, preventing the engagement and mating parts from becoming loose and improving the torque transmission capability.

[0084] Optionally, in some other embodiments, the two third lines 133 of each first tooth 13 intersect at a second point 15, each second point 15 falls on the circumference of a second circle 18, and each second point 15 does not coincide on the circumference of the second circle 18. That is, each second point 15 does not fall on the rotation axis 3, and the second point 15 is arranged eccentrically relative to the rotation axis 3.

[0085] Optionally, in an embodiment of the present disclosure, each first tooth 13 comprises a first tooth top surface 134, a first tooth bottom surface 135, two first tooth side surfaces 136, and two oppositely arranged first tooth end surfaces 137, the first tooth bottom surface 135 is connected to the first disc 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 line 131 is arranged as the first tooth 13 top line of the first tooth top surface 134, the second line 132 is arranged as the first tooth 13 bottom line of the first tooth bottom surface 135, and the bottom edge lines of the two first tooth side surfaces 136 are arranged as the third line 133. By such an arrangement, the weight of each first tooth 13 can be reduced, which is conducive to improving the light weight, and is also conducive to the meshing of the first tooth 13 structure on the cooperating piece.

[0086] 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 side edges of the first tooth top surface 134 are connected to the top portions of the two first tooth side surfaces 136 and the two first tooth end surfaces 137, and the four side surfaces of the first tooth bottom surface 135 are connected to the bottom portions of the two first tooth side surfaces 136 and the two first tooth end surfaces 137.

[0087] The bottom edge lines of the two first tooth side surfaces 136 are the third lines 133. It can be understood that the first tooth bottom surface 135 is the same plane as the radial plane 4 of the above-mentioned embodiment, and the third line 133 extends on the radial plane 4. Meanwhile, the second line 132 also extends on the radial plane 4, and the first line 131 extends above the radial plane 4 and intersects the radial plane 4.

[0088] Optionally, in an embodiment of the present disclosure, the middle line of the first tooth top surface 134 extending in the radial direction of the first disc body 11 is arranged as the first line 131, and the middle line of the first tooth bottom surface 135 extending in the radial direction of the first disc body 11 is arranged as the second line 132. By such an arrangement, the uniformity of the thickness of the second end of the corresponding first tooth 13 in the direction along the rotation axis 3 can be ensured. It can be understood that the first line 131 is the middle line of the first tooth top surface 134, the second line 132 is the middle line of the first tooth bottom surface 135, and the first line 131 is above the second line 132, so the projection of the first line 131 on the radial plane 4 overlaps the second line 132.

[0089] Optionally, in one embodiment of the present disclosure, the first tooth top surface 134 is arranged as a planar structure or a curved surface structure. By arranging the first tooth top surface 134 as a planar structure or a curved surface structure, the structural strength of each first tooth 13 can be increased, and the performance of torque transmission can be improved.

[0090] Optionally, in another embodiment of the present disclosure, each first tooth 13 comprises a first tooth bottom surface 135, two first tooth side surfaces 136, and two oppositely arranged first tooth end surfaces 137. The first tooth bottom surface 135 is connected to the first disc body 11. One of the first tooth end surfaces 137 is closer to the rotation axis 3 than the other first tooth end surface 137. The top portions of the two first tooth side surfaces 136 intersect each other, so that the shape of the first tooth end surface 137 is triangular. The intersection line of the top portions of the two first tooth side surfaces 136 is arranged as a first line 131. The middle line of the first tooth bottom surface 135 extending in the radial direction of the first disc body 11 is arranged as a second line 132. The bottom edge line of the two first tooth side surfaces 136 is arranged as a third line 133.

[0091] It can be understood that the top portion of each first tooth 13 does not have a surface structure, and the top portion of each first tooth 13 is a linear structure. The number of the first teeth 13 of the first end surface tooth portion 12 can be increased, so that the fitting tightness of the engaging member and the cooperating member can be improved.

[0092] Optionally, in one embodiment of the present disclosure, in one 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. The width dimension of each first tooth 13 linearly decreases from the first end of the corresponding first tooth 13 to the second end of the first tooth 13. By arranging the first end surface tooth portion 12 of the engaging member and the second end surface tooth portion on the cooperating member in this way, the interaction force of the first end surface tooth portion 12 and the second end surface tooth portion is arranged in a cross shape. The meshing tightness of the two can be improved, and the transmission of torque can be facilitated.

[0093] As shown in FIG. 1, Figure 2 Optionally, in one embodiment of the present disclosure, the first end surface tooth portion 12 further comprises a first tooth groove 17 between the adjacent two first teeth 13. The projection of the first tooth groove 17 towards the rotation axis 3 is triangular. By arranging the first tooth groove 17, the second end surface tooth portion on the cooperating member can be clamped in, so as to realize the meshing of the first end surface tooth portion 12 and the second end surface tooth portion. By arranging the projection of the first tooth groove 17 as a triangular shape, the flexibility of assembly can be improved, the structural strength of different assembly structures can be adapted, and the connection and cooperation of different assembly structures can be facilitated. It should be noted that the projection of the first tooth groove 17 towards the rotation axis 3 can also be trapezoidal, and the structure of the first tooth groove 17 is the same as that of the first tooth 13. It should be noted that the two side groove walls of the first tooth groove 17 are the two first tooth side surfaces 136 of the above-mentioned embodiment.

[0094] The second aspect of the present disclosure also provides a joint device, comprising a fastening component, a matching component and the torque transmission joint component as described above, the matching component and the joint component are connected with the fastening component, and the fastening component is arranged to tightly engage the matching component and the joint component.

[0095] Optionally, in an embodiment of the present disclosure, the matching component comprises a second disc body, the second disc body is arranged to rotate around the rotation axis 3, and the second disc body is provided with a second end face tooth portion, the second end face tooth portion is arranged to engage with the first end face tooth portion 12 of the joint component to transmit torque.

[0096] As shown in Figure 3 the second end face tooth portion comprises a plurality of second teeth 53, each second tooth 53 has a second tooth side line 533 on both sides, and the extension lines of the two second tooth side lines 533 of at least one second tooth 53 intersect at a fourth point 55, and the fourth point 55 falls on the rotation axis 3. By falling the fourth point 55 on the rotation axis 3, the second teeth 53 are directly opposite the rotation axis 3 instead of being arranged at an angle relative to the rotation axis 3, which facilitates the engagement and matching of the first teeth 13 and the second teeth 53 and improves torque transmission.

[0097] As shown in Figure 3 optionally, in an embodiment of the present disclosure, each second tooth 53 has a second tooth top line 531 and a second tooth bottom line 532, the extension line of the second tooth top line 531 of at least one second tooth 53 intersects with the extension line of the second tooth bottom line 532 at a third point 54, the third point 54 is away from the corresponding second tooth 53 compared to the rotation axis 3, and the third point 54 does not fall on the rotation axis 3.

[0098] wherein the extension line of the second tooth top line 531 and the extension line of the second tooth bottom line 532 intersect at the third point 54 beyond the rotation axis 3, that is, the third point 54 does not fall on the rotation axis 3, and by such arrangement, the thickness of the second tooth 53 at the end close to the rotation axis 3 can be increased, thereby improving the structural strength, and at the same time, the interaction force generated when the joint component and the matching component are connected can be improved, thereby improving torque transmission. The plurality of second teeth 53 are also arranged radially around the rotation axis 3, and the second tooth top line 531 and the second tooth bottom line 532 of each second tooth 53 are also arranged radially around the rotation axis 3.

[0099] As shown in Figure 3As shown, optionally, in one embodiment of the present disclosure, the third point 54 falls on the circumference of a third circle 56, and the center of the third circle 56 falls on the rotation axis 3. By placing the center of the third circle 56 on the rotation axis 3, the second teeth 53 are directed towards the rotation axis 3, so that when the coupling member and the mating member are connected, a centripetal force is generated towards the rotation axis 3, improving the matching of the coupling member and the mating member. In some examples, the first circle 16, the second circle 18 and the third circle 56 are concentric circles, that is, the centers of the circles all fall on the rotation axis 3, and the radii of the first circle 16, the second circle 18 and the third circle 56 can be different.

[0100] Optionally, in one embodiment of the present disclosure, the extension line of the second tooth top line 531 of each second tooth 53 intersects the extension line of the second tooth bottom line 532 at a third point 54, and each third point 54 falls on the circumference of a third circle 56, and each third point 54 does not coincide on the circumference of the third circle 56. Among them, such arrangement is to uniformly distribute a plurality of second teeth 53 around the rotation axis 3, and the thickness of each second tooth 53 in the direction along the rotation axis 3 is the same, so that the third point 54 of each second tooth 53 falls on the circumference of the same third circle 56, which can balance the stress of each second tooth 53, ensure uniform transmission of torque, and balance the structural strength of each second tooth 53.

[0101] Optionally, in another embodiment of the present disclosure, each second tooth 53 has a second tooth top line 531 and a second tooth bottom line 532, and the extension line of the second tooth top line 531 of at least one second tooth 53 intersects the extension line of the second tooth bottom line 532 at a third point 54, and the third point 54 falls on the rotation axis 3 and coincides with the fourth point 55.

[0102] Among them, the extension line of the second tooth top line 531 and the extension line of the second tooth bottom line 532 intersect the rotation axis 3, and such arrangement can make the second tooth directly face the rotation axis 3, and the rotation axis of the second tooth is on the rotation axis.

[0103] Optionally, the extension line of the second tooth top line 531 of each second tooth 53 intersects the extension line of the second tooth bottom line 532 at a third point 54, and each third point 54 falls on the rotation axis 3. Among them, such arrangement is to uniformly distribute a plurality of second teeth 53 around the rotation axis 3, and the thickness of each second tooth 53 in the direction along the rotation axis 3 is the same, which can balance the stress of each second tooth 53, ensure uniform transmission of torque, and balance the structural strength of each second tooth 53.

[0104] As Figure 4As shown, optionally, in one embodiment of this disclosure, each second tooth 53 includes a second tooth bottom surface and two second tooth side surfaces 536. The second tooth bottom surface is connected to the second disc body, and each of the two second tooth side surfaces 536 has a recessed portion, so that the two second tooth side surfaces 536 have an arc surface structure. By setting the two second tooth side surfaces 536 into an arc surface structure, it is possible to facilitate the meshing of the first end face tooth portion 12 and the second end face tooth portion, solve the problem of assembly interference, and make assembly easier.

[0105] The mating parts and the connecting parts can be connected and cooperate to achieve torque transmission. The first end face tooth 12 is located on one side of the first disc body 11, and the second end face tooth is located on one side of the second disc body. The first end face tooth 12 and the second end face tooth can mesh.

[0106] A second tooth groove is provided between two adjacent second teeth 53. Therefore, the first tooth 13 of the first end face tooth portion 12 can be inserted into the second tooth groove of the second end face tooth portion, and correspondingly, the second tooth 53 of the second end face tooth portion can be inserted into the first tooth groove 17 of the first end face tooth portion 12.

[0107] Optionally, in one embodiment of this disclosure, each second tooth 53 further includes a second tooth top surface and two opposing second tooth end surfaces 537, one second tooth end surface 537 being closer to the rotation axis 3 than the other second tooth end surface 537, and the shape of the second tooth end surface 537 being trapezoidal. That is, the second tooth 53 has a shape approximately the same as the first tooth 13.

[0108] It should be noted that the shape of the first tooth groove 17 is the same as the shape of the second tooth 53, so the shape of the projection of the first tooth groove 17 on the axis of rotation 3 is trapezoidal.

[0109] like Figure 4 As shown, optionally, in another embodiment of this disclosure, each second tooth 53 further includes two opposing second tooth end faces 537, one second tooth end face 537 being closer to the rotation axis 3 than the other second tooth end face 537, and the tops of the two second tooth side faces 536 intersecting to make the shape of the second tooth end face 537 triangular.

[0110] This design makes the second tooth 53 a tetrahedral tooth, and the strength of the second tooth 53 is less than that of the first tooth 13, which makes the first and second coupling parts more flexible in their fit and connection.

[0111] It should be noted that the shape of the first tooth groove 17 is the same as the shape of the second tooth 53, so the shape of the projection of the first tooth groove 17 on the axis of rotation 3 is a triangle.

[0112] The third aspect of the present disclosure further provides a torque transmission assembly, comprising a drive shaft cage, a hub bearing, and the engagement device as described above, the drive shaft cage and the hub bearing are connected, one of the matching part and the engaging part of the engagement device is connected to the drive shaft cage, and the other one is connected to the hub bearing.

[0113] The drive shaft cage and the hub bearing are connected through the connecting bolt, and the connecting bolt passes through the engaging part and the matching part, so as to generate a squeezing effect, so that the first end face tooth part 12 on the engaging part is closely meshed with the second end face tooth part on the matching part, and the torque transmission is ensured.

[0114] The fourth aspect of the present disclosure further provides a vehicle, comprising the torque transmission engaging part as described above, or the engagement device, or the torque transmission assembly as described above.

[0115] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0116] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0117] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as the disclosed content of the present disclosure.

Claims

1. A torque transmitting coupling, comprising: The engaging member comprises a first disc body having a rotation axis, the first disc body being rotatable about the rotation axis, the first disc body being provided with a first end face tooth portion configured to engage with a mating member connected to the engaging member to transmit torque; The first end face tooth portion comprises a plurality of first teeth, each of the first teeth having a first line at a top portion, a second line at a bottom portion, and a third line at each of two side portions, each of the first teeth having a first end away from the rotation axis and a second end close to the rotation axis, the first line, the second line and the third line extending in a direction from the first end to the second end of the corresponding first tooth; An extension line of the first line and an extension line of the second line of at least one of the first teeth intersect at a first point, and extension lines of the two third lines of the first tooth intersect at a second point, the first point being closer to the corresponding first tooth than the second point, the first point being closer to the corresponding first tooth than the rotation axis, and the second point being closer to the corresponding first tooth than the rotation axis; Each of the first teeth comprises a first tooth top surface, a first tooth bottom surface, two first tooth side surfaces, and two oppositely arranged first tooth end surfaces, the first tooth bottom surface being connected to the first disc body, one of the first tooth end surfaces being closer to the rotation axis than the other first tooth end surface, the first line being arranged as a first tooth top line of the first tooth top surface, the second line being arranged as a first tooth bottom line of the first tooth bottom surface, and the bottom edge line of the two first tooth side surfaces being arranged as the third line; A middle line of the first tooth top surface extending in a radial direction of the first disc body is arranged as the first line, and a middle line of the first tooth bottom surface extending in the radial direction of the first disc body is arranged as the second line.

2. The torque transmitting junction of claim 1, wherein, The engaging member has a virtual radial plane, and the first point and the second point are both located on the radial plane; or The engaging member has two virtual radial planes, and the first point and the second point are located on the two radial planes, respectively.

3. The torque transmitting coupling of claim 2, wherein, An included angle between the first line and the radial plane is α, and 0° < α < 90°.

4. The torque-transfer junction of claim 1, wherein, An extension line of the second line intersects the rotation axis; and / or The two third lines are symmetrically arranged with a middle line of the corresponding first tooth extending in a radial direction of the first disc body as a symmetry axis, and an extension line of the middle line intersects the rotation axis.

5. The torque-transfer junction of claim 1, wherein The first point is located on a circumference of a first circle, and a center of the first circle is located on the rotation axis.

6. The torque transmitting junction of claim 5, wherein, The first line and the second line of each of the first teeth intersect at a first point, respectively, each of the first points is located on a circumference of the same first circle, and each of the first points does not coincide on the circumference of the first circle.

7. The torque-transfer junction of claim 1, wherein The second point is located on the rotation axis.

8. The torque transfer junction of claim 5, wherein, The second point is located on a circumference of a second circle, a center of the second circle is located on the rotation axis, and a radius of the second circle is smaller than a radius of the first circle.

9. The torque-transfer junction of claim 1, wherein, Each of the third lines of each of the first teeth intersects at a second point; Each of the second points is on the rotation axis; or Each of the second points is on the circumference of a second circle, and each of the second points is not coincident on the circumference of the second circle.

10. The torque-transfer junction of claim 1, wherein, The first tooth top surface is provided as a planar structure or a curved surface structure.

11. The torque-transfer junction of claim 1, wherein Each of the first teeth comprises a first tooth bottom surface, two first tooth side surfaces, and two oppositely arranged first tooth end surfaces, the first tooth bottom surface is connected with the first disc body, one of the first tooth end surfaces is closer to the rotation axis than the other first tooth end surface, the top portions of the two first tooth side surfaces intersect, so that the shape of the first tooth end surface is triangular, the intersection line of the top portions of the two first tooth side surfaces is provided as the first line, the middle line of the first tooth bottom surface extending in the radial direction of the first disc body is provided as the second line, and the bottom edge line of the two first tooth side surfaces is provided as the third line.

12. The torque-transfer junction of claim 1, wherein, In a radial plane, the width dimension of the first end of each of the first teeth is greater than the width dimension of the second end of the corresponding first tooth, and the width dimension of each of the first teeth linearly decreases from the first end of the corresponding first tooth to the second end of the first tooth.

13. The torque transmitting junction of any one of claims 1-12, wherein, The first end surface tooth portion further comprises a first tooth groove between adjacent two first teeth, and a projection of the first tooth groove towards the rotation axis is triangular.

14. A bonding device characterized by comprising: The torque transmission joint comprises a fastening component, a matching piece, and a joint piece according to any one of claims 1-13, the matching piece and the joint piece are connected with the fastening component, and the fastening component is arranged to tightly engage the matching piece and the joint piece.

15. The engagement device of claim 14, wherein, The matching piece comprises a second disc body capable of rotating around the rotation axis, and the second disc body is provided with a second end surface tooth portion capable of engaging with the first end surface tooth portion of the joint piece to transmit torque. The second end surface tooth portion comprises a plurality of second teeth, each of the second teeth has second tooth side lines on both sides, and the extension lines of the second tooth side lines of at least one of the second teeth intersect at a fourth point on the rotation axis.

16. The engagement device of claim 15, wherein, Each of the second teeth has a second tooth top line and a second tooth bottom line. The extension line of the second tooth top line of at least one of the second teeth intersects with the extension line of the second tooth bottom line at a third point on the rotation axis.

17. The engagement device of claim 16, wherein, The extension line of the second tooth top line of at least one of the second teeth intersects with the rotation axis, the third point is on the circumference of a third circle, and the center of the third circle is on the rotation axis.

18. The engagement device of claim 15, wherein, The extension line of the second tooth top line of at least one of the second teeth intersects with the extension line of the second tooth bottom line at a third point on the rotation axis and coincides with the fourth point.

19. The engagement device of claim 15, wherein, Each of the second teeth comprises a second tooth top surface and two oppositely arranged second tooth end surfaces, one of the second tooth end surfaces is closer to the rotation axis than the other second tooth end surface, and the shape of the second tooth end surface is trapezoidal; or Each of the second teeth further comprises two second tooth end faces arranged oppositely, one of the second tooth end faces is closer to the rotation axis than the other one of the second tooth end faces, and the top of the two second tooth side faces intersects, so that the shape of the second tooth end face is triangular.

20. The engagement device of claim 15, wherein, Each of the second teeth further comprises a second tooth bottom face connected with the second disc body and two second tooth side faces, and the two second tooth side faces are arc faces with recesses.

21. A torque transmission assembly characterized by, The torque transmission assembly comprises a drive shaft ball cage, a hub bearing, and an engagement device as claimed in any one of claims 14-20, the drive shaft ball cage and the hub bearing are connected, one of the mating member and the engaging member of the engagement device is connected to the drive shaft ball cage, and the other one of the mating member and the engaging member is connected to the hub bearing.

22. A vehicle characterized by The torque transmission assembly comprises a torque transmission engaging member as claimed in any one of claims 1-13, or an engagement device as claimed in any one of claims 14-20, or a torque transmission assembly as claimed in claim 21.

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