Driving shaft assembly and vehicle

Abstract

The embodiment of the utility model provides a driving shaft assembly and a vehicle. The driving shaft assembly comprises at least two shaft rods, and the shaft rods are connected through a connecting sleeve; the shaft rod is connected with the connecting sleeve through a spline so as to prevent relative rotation around the shaft rod in the axial direction. The shaft rod is connected with the connecting sleeve through a clamping spring so as to prevent relative sliding in the axial direction of the shaft rod. Wherein the end, connected with the connecting sleeve, of the shaft rod is provided with a plurality of clamp spring grooves, the end, connected with the shaft rod, in the connecting sleeve is provided with a clamping groove, and the clamp spring is arranged in one clamp spring groove in a sleeved mode and connected with the clamping groove in a clamped mode. Due to the fact that the shaft rod is provided with the clamping spring grooves, the clamping spring is selectively arranged in one clamping spring groove in a sleeved mode and connected with the clamping groove in a clamped mode, the length of the shaft rod of the driving shaft assembly can be adjusted, then the driving shaft assembly can meet the wheel tread requirements of different vehicle types, the development period of a new vehicle type is shortened to a great extent, and the development cost of the new vehicle type is reduced.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and specifically relates to a drive shaft assembly and a vehicle. Background Art

[0002] The drive shaft assembly of a vehicle generally includes a shaft and an inner ball cage and an outer ball cage connected to both ends of the shaft. The inner ball cage is used to connect to the transmission differential, and the outer ball cage is used to connect to the wheels, thereby transmitting the power output of the powertrain to the wheels.

[0003] Currently, the axle rods of driveshaft assemblies are typically fixed in length. However, due to the varying wheelbases of different models on the same platform, the development of new models often requires custom axle rods of varying lengths to accommodate these different models, which increases the development cycle and costs of new models. Utility Model Content

[0004] The present application aims to provide a drive shaft assembly and a vehicle to solve the problem that the shaft length of the existing drive shaft assembly is fixed and cannot be adapted to different vehicle models, resulting in an increase in the development cycle and development cost of new vehicle models.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application discloses a drive shaft assembly, comprising at least two shafts, wherein the shafts are connected by a connecting sleeve;

[0007] The shaft and the connecting sleeve are connected by a spline to prevent relative rotation around the axial direction of the shaft;

[0008] The shaft rod and the connecting sleeve are connected by a retaining spring to prevent relative slippage along the axial direction of the shaft rod; wherein, a plurality of retaining spring grooves are provided on the end of the shaft rod connected to the connecting sleeve, and a retaining groove is provided on the end of the connecting sleeve connected to the shaft rod, and the retaining spring is sleeved on one of the retaining spring grooves and engaged with the retaining groove.

[0009] Optionally, the axial direction of the connecting sleeve is a first direction, the shaft includes a first shaft and a second shaft, the first shaft and the second shaft are symmetrically arranged at both ends of the connecting sleeve along the first direction, the retaining spring groove includes a first retaining spring groove and a second retaining spring groove, there are at least two first retaining spring grooves, at least two of the first retaining spring grooves are spaced apart along the first direction at one end of the first shaft close to the connecting sleeve, and there are at least two second retaining spring grooves, at least two of the second retaining spring grooves are spaced apart along the first direction at one end of the second shaft close to the connecting sleeve;

[0010] The card slot includes a first card slot and a second card slot, the first card slot and the second card slot are arranged in the connecting sleeve at intervals along the first direction, and the first card slot is close to the first shaft, and the second card slot is close to the second shaft;

[0011] The clamping spring includes a first clamping spring and a second clamping spring. The first clamping spring is sleeved on one of the first clamping spring grooves and is clamped with the first clamping groove. The second clamping spring is sleeved on one of the second clamping spring grooves and is clamped with the second clamping groove.

[0012] Optionally, the first shaft includes a first connecting portion close to the connecting sleeve, and at least two first retaining ring grooves are provided on the first connecting portion at the same interval;

[0013] The second shaft includes a second connecting portion close to the connecting sleeve, and at least two second retaining ring grooves are arranged at the same interval on the second connecting portion.

[0014] Optionally, the connecting sleeve has an inner wall, and the inner wall is provided with an internal spline;

[0015] The first connecting portion has a first outer wall provided with a first external spline, the second connecting portion has a second outer wall provided with a second external spline, and the first external spline and the second external spline are respectively connected with the internal spline.

[0016] Optionally, one end of the first connecting portion close to the center of the connecting sleeve and one end of the second connecting portion close to the center of the connecting sleeve are both in a rounded transition shape.

[0017] Optionally, the connecting sleeve includes: a first barrel segment and two second barrel segments, the two second barrel segments being arranged at both ends of the first barrel segment along the first direction;

[0018] Along the direction from the center of the connecting sleeve to the edge of the connecting sleeve, the inner diameters of the first barrel section are the same, the inner diameters of the second barrel section increase gradually, and the inner diameter of the second barrel section near one end of the first barrel section is the same as the inner diameter of the first barrel section.

[0019] Optionally, the first slot includes: two first side walls arranged opposite to each other along the first direction and a first bottom wall arranged between the two first side walls, wherein the first bottom wall and the first side wall are arranged at an obtuse angle;

[0020] The second slot includes two second side walls opposite to each other along the first direction and a second bottom wall between the two second side walls, wherein the second bottom wall forms an obtuse angle with the second side wall.

[0021] Optionally, the distance between two adjacent first retaining spring grooves is equal to the distance between two adjacent second retaining spring grooves;

[0022] A cross-sectional shape of the first clamping spring perpendicular to the first direction and a cross-sectional shape of the second clamping spring perpendicular to the first direction are both ring-shaped with an opening.

[0023] Optionally, the drive shaft assembly further comprises: a first constant velocity universal joint and a second constant velocity universal joint;

[0024] The first constant velocity universal joint is connected to one end of the first shaft away from the connecting sleeve, and the second constant velocity universal joint is connected to one end of the second shaft away from the connecting sleeve.

[0025] In a second aspect, the present application also discloses a vehicle comprising the above-mentioned drive shaft assembly.

[0026] In the embodiment of the present application, on the one hand, since the shaft and the connecting sleeve are connected by a spline, relative rotation about the shaft axis can be prevented, which is beneficial to improving the reliability of the power transmission of the drive shaft assembly. On the other hand, since the shaft and the connecting sleeve are connected by a retaining spring, relative slippage along the shaft axis can be prevented, which is beneficial to improving the stability of the power transmission of the drive shaft assembly. More importantly, since the end of the shaft connected to the connecting sleeve is provided with multiple retaining spring grooves, by selectively placing the retaining spring in one of the retaining spring grooves and engaging it with the retaining groove in the connecting sleeve, the length of the drive shaft assembly shaft can be adjusted, thereby adapting to the wheelbase requirements of different vehicle models, greatly shortening the development cycle of new models and reducing the development cost of new models.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 This is one of the structural schematic diagrams of the drive shaft assembly provided in the embodiment of the present application;

[0030] Figure 2 This is the second structural schematic diagram of the drive shaft assembly provided in an embodiment of the present application;

[0031] Figure 3 yes Figure 2 A partial enlarged view of position A in the middle;

[0032] Figure 4is a schematic structural diagram of a first shaft provided in an embodiment of the present application;

[0033] Figure 5 is a schematic structural diagram of a second shaft provided in an embodiment of the present application;

[0034] Figure 6 Schematic diagram of the structure of the connecting sleeve provided in an embodiment of the present application;

[0035] Figure 7 It is a schematic structural diagram of the first retaining spring provided in an embodiment of the present application.

[0036] Figure markings: 1. Connecting sleeve, 11. First retaining groove, 111. First bottom wall, 112. First side wall, 12. Second retaining groove, 121. Second bottom wall, 122. Second side wall, 13. Internal spline, 14. First cylinder section, 15. Second cylinder section, 2. First shaft, 21. First connecting part, 211. First retaining spring groove, 212. First external spline, 3. Second shaft, 31. Second connecting part, 311. Second retaining spring groove, 312. Second external spline, 4. First retaining spring, 5. Second retaining spring, 6. First constant velocity universal joint, 7. Second constant velocity universal joint, X. First direction. DETAILED DESCRIPTION

[0037] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of these features. In the description of this utility model, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected items, and the character " / " generally indicates an "or" relationship between the connected items.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0040] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] An embodiment of the present application provides a drive shaft assembly, which is described in detail below with reference to the accompanying drawings.

[0042] Reference Figures 1 to 2 , shows a schematic structural diagram of the drive shaft assembly provided in an embodiment of the present application, with reference to Figure 3 , showing Figure 2 A partial enlarged view of the A position in the middle, refer to Figure 4 , shows a schematic structural diagram of the first shaft provided in an embodiment of the present application, referring to Figure 5 , shows a schematic structural diagram of the second shaft provided in an embodiment of the present application, referring to Figure 6 , shows a schematic structural diagram of the connecting sleeve provided in an embodiment of the present application, referring to Figure 7 , shows a schematic diagram of the structure of the first retaining spring provided in the embodiment of the present application. It should be noted that the second retaining spring 5 has the same structure as the first retaining spring 4 and can be set with reference to the first retaining spring 4. In addition, for ease of understanding, Figure 6 The first barrel section 14 and the second barrel section 15 are schematically separated by dotted lines.

[0043] like Figures 1 to 2As shown, the present application provides a drive shaft assembly, comprising at least two shafts, which are connected by a connecting sleeve 1; the shafts and the connecting sleeve 1 are spline-connected to prevent relative rotation around the axial direction of the shafts; the shafts and the connecting sleeve 1 are connected by a retaining spring to prevent relative slippage along the axial direction of the shafts; wherein, a plurality of retaining spring grooves are provided on the end of the shaft connected to the connecting sleeve 1, and a retaining groove is provided on the end of the connecting sleeve 1 connected to the shaft, and the retaining spring is sleeved on one of the retaining spring grooves and engaged with the retaining groove.

[0044] In the embodiments of the present application, on the one hand, the spline connection between the shaft and the connecting sleeve 1 prevents relative rotation about the shaft axis, thereby improving the reliability of the drive shaft assembly's power transmission. On the other hand, the circlip connection between the shaft and the connecting sleeve 1 prevents relative slip along the shaft axis, thereby improving the stability of the drive shaft assembly's power transmission. More importantly, because the shaft end connected to the connecting sleeve 1 is provided with multiple circlip grooves, by selectively inserting a circlip into one of the circlip grooves and engaging it with the circlip groove in the connecting sleeve 1, the drive shaft assembly's shaft length can be adjusted, thereby adapting to the wheelbase requirements of different vehicle models, significantly shortening the development cycle and reducing the development cost of new models. It should be noted that the term "multiple" in the embodiments of the present application refers to greater than or equal to two. That is, the number of circlip grooves provided on the shaft end connected to the connecting sleeve 1 is greater than or equal to two. The specific number is not limited here and can be adjusted by those skilled in the art according to actual needs.

[0045] In some optional embodiments of the present application, the axial direction of the connecting sleeve 1 is the first direction X, the shaft includes a first shaft 2 and a second shaft 3, the first shaft 2 and the second shaft 3 are symmetrically arranged at both ends of the connecting sleeve 1 along the first direction X, the retaining spring groove includes a first retaining spring groove 211 and a second retaining spring groove 311, and there are at least two first retaining spring grooves 211, and at least two first retaining spring grooves 211 are spaced apart along the first direction X at one end of the first shaft 2 close to the connecting sleeve 1, and at least two second retaining spring grooves 311 are provided, and at least two second retaining spring grooves 311 are provided. It is arranged at intervals along the first direction X on the second shaft 3 close to one end of the connecting sleeve 1; the clamping groove includes a first clamping groove 11 and a second clamping groove 12, and the first clamping groove 11 and the second clamping groove 12 are arranged at intervals along the first direction X in the connecting sleeve 1, and the first clamping groove 11 is close to the first shaft 2, and the second clamping groove 12 is close to the second shaft 3; the retaining spring includes a first clamping spring 4 and a second clamping spring 5, the first clamping spring 4 is sleeved on one of the first clamping spring grooves 211 and is clamped with the first clamping groove 11, and the second clamping spring 5 is sleeved on one of the second clamping spring grooves 311 and is clamped with the second clamping groove 12.

[0046] In the embodiment of the present application, since the first shaft 2 is provided with a first retaining spring groove 211, the second shaft 3 is provided with a second retaining spring groove 311, and the connecting sleeve 1 is provided with a first retaining groove 11 and a second retaining groove 12, a reliable connection between the first shaft 2 and the connecting sleeve 1, and between the second shaft 3 and the connecting sleeve 1, can be achieved by inserting the first retaining spring 4 into the first retaining spring groove 211 and engaging it with the first retaining groove 11, and inserting the second retaining spring groove 311 into the second retaining spring groove 311 and engaging it with the second retaining groove 12. More importantly, since there are at least two first retaining spring grooves 211 and at least two second retaining spring grooves 311, the position of the first retaining spring 4 on the first shaft 2 and the position of the second retaining spring 5 on the second shaft 3 can be adjusted as needed, thereby adjusting the shaft length of the drive shaft assembly and adapting to the wheelbase requirements of different vehicle models, greatly shortening the development cycle and reducing the development cost of new models.

[0047] It should be noted that the embodiment of the present application does not limit the number and spacing of the first retaining spring groove 211 and the second retaining spring groove 311, and those skilled in the art can adjust them according to actual needs. In order to facilitate processing and assembly, the first retaining spring 4 and the second retaining spring 5 in the embodiment of the present application can be retaining springs with the same structure and size, the first retaining spring groove 211 and the second retaining spring groove 311 can be retaining spring grooves with the same structure and size, and the first retaining groove 11 and the second retaining groove 12 can be retaining grooves with the same structure and size. In one embodiment, Figure 7 As shown, the first and second retaining springs 4 and 5 are both annular retaining springs with an opening. Accordingly, the first retaining spring groove 211 extends along the circumference of the first shaft 2, the second retaining spring groove 311 extends along the circumference of the second shaft 3, and the first retaining groove 11 and the second retaining groove 12 extend along the circumference of the connecting sleeve 1. Furthermore, the materials of the first and second retaining springs 4 and 5 include, but are not limited to, spring steel.

[0048] In one embodiment, two first retaining spring grooves 211 are provided, and the distance between adjacent first retaining spring grooves 211 is M. Two second retaining spring grooves 311 are provided, and the distance between adjacent second retaining spring grooves 311 is N. Assuming that the first retaining spring 4 is sleeved in the first retaining spring groove 211 near the center of the connecting sleeve 1, and the second retaining spring 5 is sleeved in the second retaining spring groove 311 near the center of the connecting sleeve 1, and the shaft length of the drive shaft assembly is L, then by adjusting the positions of the first retaining spring 4 and the second retaining spring 5, the drive shaft assembly can have four different shaft lengths: L, L+M, L+N, and L+M+N, thereby meeting the requirements of different models on the same platform.

[0049] In some optional embodiments of the present application, the first shaft 2 includes a first connecting portion 21 proximate to the connecting sleeve 1, with at least two first retaining spring grooves 211 disposed at equal intervals on the first connecting portion 21; the second shaft 3 includes a second connecting portion 31 proximate to the connecting sleeve 1, with at least two second retaining spring grooves 311 disposed at equal intervals on the second connecting portion 31. That is, the spacing between two adjacent first retaining spring grooves 211 is equal, and the spacing between two adjacent second retaining spring grooves 311 is equal. This simplifies the structures of the first connecting portion 21 and the second connecting portion 31, reduces the difficulty in processing the first shaft 2 and the second shaft 3, and improves processing efficiency.

[0050] It should be noted that, taking the first retaining spring groove 211 as an example, the spacing between two adjacent first retaining spring grooves 211 refers to the spacing between the center lines of the two adjacent first retaining spring grooves 211. When multiple first retaining spring grooves 211 have the same size, the spacing between two adjacent first retaining spring grooves 211 is the spacing between the center lines of the two adjacent first retaining spring grooves 211, that is, the spacing between the first sidewall 112 on the same side of the two adjacent first retaining spring grooves 211. The spacing between two adjacent second retaining spring grooves 311 is similar and will not be elaborated on here. For example, Figure 4 As shown, the distance between two adjacent first retaining spring grooves 211 is the distance between the two adjacent first retaining spring grooves 211 on the first side wall 112 on the left side. Figure 5 As shown, the spacing between two adjacent second retaining spring grooves 311 is the spacing between the two adjacent second retaining spring grooves 311 on the right side of the second side wall 122. In addition, in actual applications, at least two first retaining spring grooves 211 can also be arranged at different spacings on the first connecting portion 21, and at least two second retaining spring grooves 311 can also be arranged at different spacings on the second connecting portion 31. This is not limited here, and those skilled in the art can adjust according to actual needs.

[0051] In some optional embodiments of the present application, the connecting sleeve 1 has an inner wall, which is provided with an internal spline 13; the first connecting part 21 has a first outer wall, which is provided with a first external spline 212; the second connecting part 31 has a second outer wall, which is provided with a second external spline 312; the first external spline 212 and the second external spline 312 are respectively connected to the internal spline 13.

[0052] In actual applications, the shaft of the drive shaft assembly needs to withstand a large torque. Based on this, by setting an internal spline 13 on the inner wall of the connecting sleeve 1, setting a first external spline 212 on the first outer wall of the first connecting part 21, and setting a second external spline 312 on the second outer wall of the second connecting part 31. In this way, through the cooperation of the first external spline 212 and the internal spline 13, as well as the cooperation of the second external spline 312 and the internal spline 13, not only can the connecting sleeve 1 be reliably connected to the first shaft 2 and the second shaft 3, but it can also withstand a large torque, which is beneficial to improving the structural strength and stability of the entire drive shaft assembly. In addition, this spline connection method has a simple structure and is easy to assemble, which is beneficial to improving the assembly efficiency of the connecting sleeve 1 and the first shaft 2 and the second shaft 3.

[0053] In some optional embodiments of the present application, the end of the first connecting portion 21 close to the center of the connecting sleeve 1 and the end of the second connecting portion 31 close to the center of the connecting sleeve 1 are both rounded transition-shaped. In this way, during the assembly process of the first connecting portion 21 of the first shaft 2 and the connecting sleeve 1, the friction and interference between the first external spline 212 provided on the first connecting portion 21 and the internal spline 13 provided on the connecting sleeve 1 can be reduced, so that the two can be assembled more smoothly and accurately, which is conducive to improving the assembly efficiency of the drive shaft assembly. Similarly, during the assembly process of the second connecting portion 31 of the second shaft 3 and the connecting sleeve 1, the friction and interference between the second external spline 312 provided on the second connecting portion 31 and the internal spline 13 provided on the connecting sleeve 1 can be reduced, so that the two can be assembled more smoothly and accurately, which is conducive to further improving the assembly efficiency of the drive shaft assembly.

[0054] In some optional embodiments of the present application, the distance between two adjacent first retaining spring grooves 211 is equal to the distance between two adjacent second retaining spring grooves 311 .

[0055] In the embodiment of the present application, since the spacing M between two adjacent first retaining spring grooves 211 is equal to the spacing N between two adjacent second retaining spring grooves 311, that is, a standardized and unified spacing is adopted, this not only simplifies the adjustment process of the shaft length and improves work efficiency; it also simplifies the structure of the drive shaft assembly, reduces the processing difficulty of the drive shaft assembly, and improves the processing efficiency of the drive shaft assembly.

[0056] It should be noted that the distance M between two adjacent first retaining spring grooves 211 and the distance N between two adjacent second retaining spring grooves 311 are designed to be unequal, which is not limited here and can be adjusted by those skilled in the art according to actual needs.

[0057] In some optional embodiments of the present application, the connecting sleeve 1 includes: a first barrel section 14 and two second barrel sections 15, and the two second barrel sections 15 are arranged at both ends of the first barrel section 14 along the first direction X; along the direction from the center of the connecting sleeve 1 to the edge of the connecting sleeve 1, the inner diameters of the first barrel section 14 are the same, the inner diameters of the second barrel sections 15 increase gradually, and the inner diameter of the second barrel section 15 close to one end of the first barrel section 14 is the same as the inner diameter of the first barrel section 14.

[0058] In the embodiment of the present application, the inner diameter of the second barrel section 15 increases gradually along the direction from the center of the connecting sleeve 1 to the edge of the connecting sleeve 1. In this way, a bevel with a guiding function can be formed on the inner wall of the second barrel section 15. Taking the assembly of the first shaft rod 2 and the connecting sleeve 1 as an example, when the first shaft rod 2 is pushed along the first direction X, the first retaining spring 4 can contact the bevel and continuously undergo diameter shrinkage deformation under the guiding action of the bevel, so as to improve the assembly convenience of the first shaft rod 2 and the connecting sleeve 1. The assembly of the second shaft rod 3 and the connecting sleeve 1 is similar and will not be described in detail here. In addition, since the inner diameter of the second barrel section 15 near one end of the first barrel section 14 is the same as the inner diameter of the first barrel section 14, that is, the connection between the second barrel section 15 and the first barrel section 14 is a smooth transition, it is conducive to the smooth movement of the first shaft rod 2 and the second shaft rod 3 in the connecting sleeve 1.

[0059] In some optional embodiments of the present application, the first retaining groove 11 includes: two first side walls 112 arranged opposite each other along the first direction X; and a first bottom wall 111 disposed between the two first side walls 112, with the first bottom wall 111 and the first side walls 112 being arranged at an obtuse angle. That is, the first retaining groove 11 has chamfered structures on both sides along the first direction X. This, on the one hand, can limit the first retaining spring 4 and achieve axial positioning of the first shaft 2, thereby improving the assembly reliability and assembly accuracy of the first shaft 2 and the connecting sleeve 1; on the other hand, during the disassembly of the first shaft 2, the chamfered structures can guide the first retaining spring 4, thereby facilitating the disassembly of the first shaft 2.

[0060] Furthermore, the second retaining groove 12 includes two second side walls 122 arranged opposite each other along the first direction X, and a second bottom wall 121 disposed between the two second side walls 122. The second bottom wall 121 is arranged at an obtuse angle to the second side walls 122. That is, the second retaining groove 12 has chamfered structures on both sides along the first direction X. This, on the one hand, can limit the second retaining spring 5 and achieve axial positioning of the second shaft 3, thereby improving the assembly reliability and assembly accuracy of the second shaft 3 and the connecting sleeve 1; on the other hand, during the removal of the second shaft 3, the chamfered structures can guide the second retaining spring 5, thereby facilitating the removal of the second shaft 3.

[0061] It should be noted that the embodiment of the present application does not limit the angles between the first bottom wall 111 and the first side wall 112, and between the second bottom wall 121 and the second side wall 122. Those skilled in the art may adjust these angles based on actual needs. For example, the angles between the first bottom wall 111 and the first side wall 112, and between the second bottom wall 121 and the second side wall 122 may be 100°, 120°, 150°, or other values.

[0062] In some optional embodiments of the present application, the cross-sectional shape of the first retaining spring 4 perpendicular to the first direction X, and the cross-sectional shape of the second retaining spring 5 perpendicular to the first direction X are both ring-shaped with an opening. Taking the first retaining spring 4 as an example, on the one hand, the ring-shaped cross-section with an opening can make the first retaining spring 4 more evenly distributed when subjected to stress, thereby avoiding stress concentration, which is beneficial to improving the load-bearing capacity and service life of the first retaining spring 4. On the other hand, the ring-shaped cross-section with an opening can make the contour of the first retaining spring 4 smoother, making the disassembly and assembly process smoother, which is beneficial to reducing the difficulty of assembling the first shaft 2. In addition, the ring-shaped cross-section with an opening can make the first retaining spring 4 have good elasticity and resilience, which is beneficial to improving the connection stability and reliability between the first shaft 2 and the connecting sleeve 1. The second retaining spring 5 is similar and will not be elaborated here.

[0063] In some optional embodiments of the present application, the drive shaft assembly further includes: a first constant velocity universal joint 6 (i.e., an outer ball joint) and a second constant velocity universal joint 7 (i.e., an inner ball joint); the first constant velocity universal joint 6 is connected to the end of the first shaft 2 facing away from the connecting sleeve 1, and the second constant velocity universal joint 7 is connected to the end of the second shaft 3 facing away from the connecting sleeve 1. In this way, when the first constant velocity universal joint 6 is connected to the transmission differential and the second constant velocity universal joint 7 is connected to the wheels, the power output from the powertrain can be reliably transmitted to the wheels.

[0064] It should be noted that the first constant velocity universal joint 6 and the second constant velocity universal joint 7 can be existing products. The drive shaft assembly of the embodiment of the present application can be obtained by assembling the first constant velocity universal joint 6 with the first shaft 2, the second constant velocity universal joint 7 with the second shaft 3, and the first shaft 2, the second shaft 3 and the connecting sleeve 1.

[0065] Combine Figures 1 to 7 The following provides an example of the assembly process of the first shaft 2 and the connecting sleeve 1 according to an embodiment of the present application. It should be noted that the assembly process of the second shaft 3 and the connecting sleeve 1 is the same as that of the first shaft 2 and the connecting sleeve 1, and will not be described in detail here:

[0066] Align the first external spline 212 of the first connecting part 21 with the internal spline 13 of the connecting sleeve 1 and push the first connecting part 21 into the connecting sleeve 1; continue to push, the first retaining spring 4 sleeved on the first retaining spring groove 211 contacts the inner wall of the second cylindrical section 15 and slides along the inner wall of the second cylindrical section 15, and at the same time, the first retaining spring 4 continues to shrink in diameter until the first retaining spring 4 contacts the inner wall of the first cylindrical section 14; continue to push, when the first retaining spring 4 reaches the first retaining groove 11, the first retaining spring 4 expands in diameter under the action of the elastic restoring force to engage with the first retaining groove 11, thereby completing the assembly of the first shaft 2 and the connecting sleeve 1.

[0067] In summary, the drive shaft assembly provided by the embodiments of the present application has at least the following advantages:

[0068] In the embodiments of the present application, on the one hand, the spline connection between the shaft and the connecting sleeve prevents relative rotation about the shaft axis, thereby improving the reliability of the drive shaft assembly's power transmission. On the other hand, the retaining spring connection between the shaft and the connecting sleeve prevents relative slippage along the shaft axis, thereby improving the stability of the drive shaft assembly's power transmission. More importantly, because the shaft end connected to the connecting sleeve is provided with multiple retaining spring slots, the length of the drive shaft assembly can be adjusted by selectively fitting the retaining spring into one of the retaining spring slots and engaging it with the retaining spring slot in the connecting sleeve, thereby adapting to the wheelbase requirements of different vehicle models, significantly shortening the development cycle of new models and reducing the development cost of new models.

[0069] An embodiment of the present application also provides a vehicle comprising the above-mentioned drive shaft assembly.

[0070] It should be noted that in the embodiment of the present application, the structure of the drive shaft assembly is the same as the structure of the drive shaft assembly described in any of the above embodiments, and its beneficial effects are also similar, which will not be described in detail here.

[0071] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0072] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A drive shaft assembly, characterized in that: It comprises at least two shafts, and the shafts are connected by a connecting sleeve; The shaft and the connecting sleeve are connected by a spline to prevent relative rotation around the axial direction of the shaft; The shaft rod and the connecting sleeve are connected by a retaining spring to prevent relative slippage along the axial direction of the shaft rod; wherein, a plurality of retaining spring grooves are provided on the end of the shaft rod connected to the connecting sleeve, and a retaining groove is provided on the end of the connecting sleeve connected to the shaft rod, and the retaining spring is sleeved on one of the retaining spring grooves and engaged with the retaining groove.

2. The drive shaft assembly according to claim 1, characterized in that: The axial direction of the connecting sleeve is a first direction, the shaft includes a first shaft and a second shaft, the first shaft and the second shaft are symmetrically arranged at both ends of the connecting sleeve along the first direction, the retaining spring groove includes a first retaining spring groove and a second retaining spring groove, there are at least two first retaining spring grooves, at least two of the first retaining spring grooves are spaced apart along the first direction at one end of the first shaft close to the connecting sleeve, and there are at least two second retaining spring grooves, at least two of the second retaining spring grooves are spaced apart along the first direction at one end of the second shaft close to the connecting sleeve; The card slot includes a first card slot and a second card slot, the first card slot and the second card slot are arranged in the connecting sleeve at intervals along the first direction, and the first card slot is close to the first shaft, and the second card slot is close to the second shaft; The clamping spring includes a first clamping spring and a second clamping spring. The first clamping spring is sleeved on one of the first clamping spring grooves and is clamped with the first clamping groove. The second clamping spring is sleeved on one of the second clamping spring grooves and is clamped with the second clamping groove.

3. The drive shaft assembly according to claim 2, characterized in that: The first shaft includes a first connecting portion close to the connecting sleeve, and at least two first retaining ring grooves are arranged at the same interval on the first connecting portion; The second shaft includes a second connecting portion close to the connecting sleeve, and at least two second retaining ring grooves are arranged at the same interval on the second connecting portion.

4. The drive shaft assembly according to claim 3, characterized in that: The connecting sleeve has an inner wall, and the inner wall is provided with an internal spline; The first connecting portion has a first outer wall provided with a first external spline, the second connecting portion has a second outer wall provided with a second external spline, and the first external spline and the second external spline are respectively connected with the internal spline.

5. The drive shaft assembly according to claim 3, characterized in that: One end of the first connecting portion close to the center of the connecting sleeve and one end of the second connecting portion close to the center of the connecting sleeve are both in a rounded transition shape.

6. The drive shaft assembly according to claim 2, characterized in that: The connecting sleeve includes: a first barrel segment and two second barrel segments, wherein the two second barrel segments are arranged at both ends of the first barrel segment along the first direction; Along the direction from the center of the connecting sleeve to the edge of the connecting sleeve, the inner diameters of the first barrel section are the same, the inner diameters of the second barrel section increase gradually, and the inner diameter of the second barrel section near one end of the first barrel section is the same as the inner diameter of the first barrel section.

7. The drive shaft assembly according to claim 2, characterized in that: The first card slot includes: two first side walls arranged opposite to each other along the first direction and a first bottom wall arranged between the two first side walls, wherein the first bottom wall and the first side wall are arranged at an obtuse angle; The second slot includes two second side walls opposite to each other along the first direction and a second bottom wall between the two second side walls, wherein the second bottom wall forms an obtuse angle with the second side wall.

8. The drive shaft assembly according to claim 2, characterized in that: The distance between two adjacent first retaining spring grooves is equal to the distance between two adjacent second retaining spring grooves; A cross-sectional shape of the first clamping spring perpendicular to the first direction and a cross-sectional shape of the second clamping spring perpendicular to the first direction are both ring-shaped with an opening.

9. The drive shaft assembly according to claim 2, characterized in that: The drive shaft assembly further includes: a first constant velocity universal joint and a second constant velocity universal joint; The first constant velocity universal joint is connected to one end of the first shaft away from the connecting sleeve, and the second constant velocity universal joint is connected to one end of the second shaft away from the connecting sleeve.

10. A vehicle, characterized in that: Comprising the drive shaft assembly according to any one of claims 1-9.

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