Driving shaft structure and vehicle

Abstract

The utility model discloses a drive shaft structure and a vehicle, the drive shaft structure comprises a fixed joint and a shaft lever, the fixed joint is installed at one end of the shaft lever, the fixed joint comprises a fixed joint shell and an inner star wheel, one end of the fixed joint shell is in transmission connection with the wheel end of the vehicle, and the other end of the fixed joint shell is in transmission connection with the inner star wheel. The other end of the fixed joint shell is connected with the inner star wheel, and the end, extending in the axial direction of the shaft rod, of the inner star wheel is in transmission connection with the shaft rod through a quick release structure. The inner star wheel and the shaft rod are fixed and detachably connected through the quick release structure, the fixing joints serve as independent modules, when the fixing joints are replaced, the fixing joints can be detached only by detaching a tire or a hub decorative cover, and maintenance convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a drive shaft structure and a vehicle. Background Art

[0002] The driveshaft is installed between the vehicle's wheel ends and the power source (such as the differential or drive motor assembly), transmitting torque and speed. A suspension structure is installed on the driveshaft, requiring multiple component disassembly for repair or replacement. For example, in a four-link suspension driveshaft, repair or replacement requires disassembly of multiple components, including the coil spring, front and rear swing arm outer points, upper swing arm outer points, trailing arms, and shock absorber lower points. The entire steering knuckle and wheel hub bearing must be removed before the driveshaft can be removed; or the entire rear suspension assembly must be disassembled before the driveshaft can be removed. This makes the driveshaft less user-friendly. Furthermore, during new vehicle development or market troubleshooting, removing too many components when replacing the driveshaft can prevent the fault from reoccurring, hindering root cause identification. In existing technology, the driveshaft consists of a fixed joint, a shaft, and a movable joint. Whether replacing the fixed or movable joint requires complete disassembly, compromising ease of use. Utility Model Content

[0003] The utility model aims to at least solve the technical problem in the prior art that when replacing a drive shaft, whether it is necessary to replace a fixed section or a movable section, the drive shaft needs to be dismantled as a whole, which affects the convenience of operation.

[0004] To this end, one purpose of the present utility model is to propose a drive shaft structure, which includes a fixed joint and a shaft rod, wherein the fixed joint is installed at one end of the shaft rod, the fixed joint includes a fixed joint housing and an inner star wheel, one end of the fixed joint housing is transmission-connected to the wheel end of the vehicle, the other end of the fixed joint housing is connected to the inner star wheel, and the end of the inner star wheel extending axially toward the shaft rod is transmission-connected to the shaft rod through a quick-release structure.

[0005] In some embodiments, the quick-release structure includes a first fastener, a sliding rod, a clamping member and a reset member, a sliding rod hole for accommodating the sliding rod is provided in the shaft rod, a mounting hole and a clamping hole respectively connected to the sliding rod hole are opened on the shaft rod, a first groove cooperating with the first fastener and a second groove cooperating with the clamping member are provided on the sliding rod, the reset member is provided in the sliding rod hole, one end of the reset member is connected to the sliding rod, and the other end of the reset member is connected to the hole wall of the sliding rod hole, the first fastener in the mounting hole can act with the sliding rod to drive the sliding rod to move, and the movement of the sliding rod can drive the clamping member in the clamping hole to move to fix or unlock the inner star wheel and the shaft rod.

[0006] In some embodiments, the clamping member includes a pin and a limiting spring, the clamping hole includes a pin hole and a first limiting slot opened on the shaft, the pin is arranged in the pin hole, and the limiting spring is installed on the radial outside of the pin and is located in the first limiting slot.

[0007] In some embodiments, the inner star wheel includes an inner star wheel body and an axial connection portion extending axially from the inner star wheel body toward the shaft, and an end of the axial connection portion is provided with a connection groove connected to the shaft.

[0008] In some embodiments, a second limiting slot is provided in the connecting groove and docked with the first limiting slot.

[0009] In some embodiments, the end of the first fastener has a first arcuate surface, the first groove is provided with a first conical surface that cooperates with the first arcuate surface, the end of the clamping member is provided with a second arcuate surface, and the second groove is provided with a second conical surface that cooperates with the second arcuate surface.

[0010] In some embodiments, the quick-release structure further includes a retaining ring disposed in the slide rod hole, and the retaining ring and the reset member are respectively located on both axial sides of the slide rod.

[0011] In some embodiments, the return member is a wave spring.

[0012] In some embodiments, the sliding rod is made of medium carbon steel or bearing steel, and the ejector pin is made of medium carbon steel or bearing steel.

[0013] In some embodiments, a sheath is provided on the outer periphery of the axial connection portion, and the sheath is connected to the axial connection portion via a clamp.

[0014] Another object of the present invention is to provide a vehicle comprising the above-mentioned drive shaft structure.

[0015] The drive shaft structure and vehicle provided by the embodiments of the present invention have the following beneficial effects:

[0016] The drive shaft structure includes a fixed joint and a shaft rod. The fixed joint is installed at one end of the shaft rod. The fixed joint includes a fixed joint housing and an inner star wheel. The vehicle wheel hub and wheel hub decorative cover are installed outside the wheel end of the vehicle. One end of the fixed joint housing is transmission connected to the wheel end of the vehicle, and the end of the inner star wheel extending axially toward the shaft rod is transmission connected to the shaft rod through a quick-release structure. The quick-release structure realizes the fixation and detachable connection of the inner star wheel and the shaft rod. The fixed joint is a separate module. When replacing the fixed joint, only the tire or wheel hub decorative cover needs to be removed to remove the fixed joint, thereby improving the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a cross-sectional view of the drive shaft structure in an embodiment of the present utility model;

[0019] Figure 2 It is a structural schematic diagram of the fixed joint and the wheel end of the vehicle in an embodiment of the utility model;

[0020] Figure 3 It is a partial enlarged view of the shaft in the embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional view of the quick-disassembly structure of the drive shaft structure before assembly in an embodiment of the present utility model;

[0022] Figure 5 This utility model Figure 4 A partial enlarged view of the area marked A;

[0023] Figure 6 This utility model Figure 4 A partial enlarged view of the area marked B in the middle;

[0024] Figure 7 This is a cross-sectional view of the quick-disassembly structure of the drive shaft structure after assembly in an embodiment of the present utility model;

[0025] Figure 8 This utility model Figure 7 A partial enlarged view of the area marked C in the middle;

[0026] Figure 9 This utility model Figure 7 A partial enlarged view of the area marked D in the middle.

[0027] Reference numerals:

[0028] 1. Fixed joint; 11. Fixed joint housing; 12. Inner star gear; 121. Inner star gear body; 122. Axial connection portion; 123. Connecting groove; 13. Sheath; 14. Clamp; 2. Shaft; 3. First spline; 31. First spline shaft; 32. First spline hole; 4. Second spline; 41. Second spline hole; 42. Second spline shaft; 5. Wheel end of vehicle; 51. Wheel hub bearing; 52. Second fastener; 6. Moving joint; 7. Quick release structure; 7 1. First fastener; 711. First curved surface; 72. Slide rod; 721. Slide rod hole; 722. First conical surface; 723. Second conical surface; 724. First groove; 725. Second groove; 73. Connector; 731. Ejector pin; 732. Position-limiting retaining spring; 733. Second curved surface; 74. Reset member; 75. Mounting hole; 76. Connector hole; 761. Ejector pin hole; 762. First position-limiting retaining groove; 763. Second position-limiting retaining groove; 77. Retaining ring. DETAILED DESCRIPTION

[0029] Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

[0030] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present invention will occur to those skilled in the art.

[0031] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0032] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0033] It should also be understood that although the present invention has been described with reference to certain specific examples, those skilled in the art will be able to surely realize many other equivalent forms of the present invention, which have the characteristics described in the claims and are therefore within the scope of protection defined thereby.

[0034] The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0035] Specific embodiments of the present invention will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present invention, which may be implemented in a variety of ways. Well-known and / or repetitive functions and structures are not described in detail to avoid obscuring the present invention with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for teaching those skilled in the art to variously use the present invention with substantially any suitable detailed structure.

[0036] The first embodiment of the present invention provides a drive shaft structure, such as Figures 1-9 As shown, the drive shaft structure includes a fixed section 1 and a shaft 2. The fixed section 1 is installed at one end of the shaft 2. The fixed section 1 includes a fixed section housing 11 and an inner star wheel 12. One end of the fixed section housing 11 is transmission-connected to the wheel end 5 of the vehicle, and the other end of the fixed section housing 11 is connected to the inner star wheel 12. The end of the inner star wheel 12 extending axially toward the shaft 2 is transmission-connected to the shaft 2 through a quick-release structure 7.

[0037] Specifically, if Figure 1 and Figure 2 As shown, the vehicle's wheel end 5 is externally mounted with a vehicle tire and a hub cover. The vehicle's wheel end 5 and the shaft 2 are mounted on both ends of the fixed joint 1, respectively. The fixed joint housing 11 of the fixed joint 1 is transmission-connected to the vehicle's wheel end 5 (for example, via a first spline 3), and the other end of the fixed joint housing 11 is connected to the inner star wheel 12. The end of the inner star wheel 12 extending axially toward the shaft 2 is transmission-connected to the shaft 2 via a quick-release structure 7. The fixed joint 1 is an independent module. When assembled, the fixed joint 1 and the vehicle's wheel end 5 form a whole. When the fixed joint 1 needs to be replaced, since the fixed joint 1 and the shaft 2 are detachably connected via the quick-release structure 7, the fixed joint 1 can be removed from the drive shaft structure after removing the vehicle tire or hub cover. There is no need to remove the entire drive shaft structure before removing the fixed joint 1, which improves the convenience of disassembly. The fixed joint 1 module can be removed separately, which facilitates troubleshooting.

[0038] In some embodiments, a first spline shaft 31 is provided at one end of the fixed joint housing 11, and a wheel hub bearing 51 is provided at the vehicle's wheel end 5. A first spline hole 32 is provided within the wheel hub bearing 51. The first spline shaft 31 passes through the first spline hole 32 and is secured via a second fastener 52. The vehicle wheel hub and tire are mounted externally to the wheel hub bearing 51, and a wheel hub decorative cover is mounted on the outer side of the vehicle wheel hub along the vehicle width direction. Specifically, the first spline shaft 31 and the first spline hole 32 cooperate with each other to achieve radial fixation between the fixed joint housing 11 and the wheel hub bearing 51. The wheel hub bearing 51 is sleeved externally on the first spline shaft 31. The second fastener 52 is installed at the end of the first spline shaft 31 away from the inner star wheel 12 to achieve axial fixation between the first spline shaft 31 and the wheel hub bearing 51, ensuring the reliability of the connection between the first spline shaft 31 and the wheel hub bearing 51, thereby ensuring the reliability of the connection between the fixed joint 1 and the wheel hub bearing 51. The fixed joint housing 11 and the wheel hub bearing 51 are connected via the first spline shaft 31, ensuring a reliable connection while facilitating installation and disassembly. In addition, the wheel hub bearing 51 and the fixed joint housing 11 can be disassembled by removing the second fastener 52, which is convenient for installation and disassembly.

[0039] In some embodiments, the inner planet 12 includes an inner planet body 121 and an axial connection portion 122 extending axially from the inner planet body 121 toward the shaft 2. The end of the axial connection portion 122 is provided with a connection groove 123 connected to the shaft 2. Specifically, the inner planet 12 is configured in a manner in which the inner planet body 121 and the axial connection portion 122 are connected. The axial connection portion 122 extends axially along the inner planet body 121 toward the shaft 2, extending the length of the inner planet 12. The axial connection portion 122 of the inner planet 12 and the shaft 2 can be directly connected via the quick-release structure 7 without introducing an additional connecting member between the inner planet 12 and the shaft 2, thereby improving the connection reliability between the inner planet 12 and the shaft 2.

[0040] A sheath 13 is provided on the outer periphery of the axial connection portion 122 and is connected to the axial connection portion 122 via a clamp 14. The sheath 13 protects the axial connection portion 122 of the inner star gear 12 within it. For example, the sheath 13 has a corrugated wall. The clamp 14 connects the sheath 13 to the axial connection portion 122 of the inner star gear 12, ensuring the strength of the connection between the sheath 13 and the inner star gear 12.

[0041] In other embodiments, one end of the inner star wheel 12 is connected to the fixed joint housing 11, and the other end of the inner star wheel 12 is connected to the shaft 2 through a second spline 4. Specifically, a second spline hole 41 is provided at the other end of the inner star wheel 12, and a second spline shaft 42 is provided at one end of the shaft 2. The second spline shaft 42 extends into the second spline hole 41 and is fixed by a quick-release structure 7.

[0042] Specifically, the drive shaft structure also includes a movable joint 6, which is mounted on the other end of the shaft 2 and connected to the vehicle's power supply (e.g., differential, drive motor assembly, etc.). The movable joint 6 and the shaft 2 form a module. When removing the movable joint 6, the movable joint 6 and the shaft 2 can be completely removed from the drive shaft structure by adjusting the quick-release mechanism 7. This eliminates the need to first remove the vehicle's wheel end 5, fixed joint 1, and shaft 2 before removing the movable joint 6, thus improving the convenience of removing the movable joint 6.

[0043] Furthermore, pre-shipment assembly can be diversified, offering OEMs a variety of ways to assemble the fixed segment 1 module. The fixed segment 1 module can be assembled independently along with the wheel hub bearing 51 and brake unit, or as a standalone module on the vehicle assembly line. The movable segment 6 and shaft 2 are assembled as a separate module on the vehicle assembly line.

[0044] In some embodiments, as Figure 3 and Figure 4 When the lock is in the state of being, the lock body 71 is in the state of being rotated, and the lock body 71 is in the state of being rotated. As shown in FIG. 7 , the quick-release structure 7 includes a first fastener 71 , a slide bar 72 , a clip 73 and a reset member 74 . A slide bar hole 721 is provided in the shaft rod 2 for accommodating the slide bar 72 . A mounting hole 75 and a clip hole 76 are provided on the shaft rod 2 which are respectively connected to the slide bar hole 721 . A first groove 724 is provided on the slide bar 72 for cooperating with the first fastener 71 and a second groove 725 for cooperating with the clip 73 . The reset member 74 is provided in the slide bar hole 721 . One end of the reset member 74 is connected to the slide bar 72 , and the other end of the reset member 74 is connected to the hole wall of the slide bar hole 721 . The first fastener 71 in the mounting hole 75 can act on the slide bar 72 to drive the slide bar 72 to move. The movement of the slide bar 72 can drive the clip 73 in the clip hole 76 to move to fix or unlock the inner star wheel 12 and the shaft rod 2

[0045] Specifically, the slide rod 72 is disposed in a slide rod hole 721 opened along the axial direction of the shaft 2 and the slide rod 72 can reciprocate in the slide rod hole 721. The first fastener 71 is disposed in a mounting hole 75 opened along the radial direction of the shaft 2, and the clamping member 73 is disposed in a clamping hole 76 opened along the radial direction of the shaft 2. The clamping member 73 and the first fastener 71 are respectively disposed on the left and right sides of the slide rod 72, and act on the slide rod 72 at different positions, respectively, to increase the number of mounting points between the slide rod 72 and the shaft 2, and to ensure the axial fixation reliability of the shaft 2 and the inner star wheel 12. Among them, the first fastener 71 is used to fix the slide rod 72 and the shaft 2, and the clamping member 73 is used to fix the axial connection portion 122 of the slide rod 72, the shaft 2 and the inner star wheel 12. When assembling the drive shaft structure, the first fastener 71 is screwed into the mounting hole 75. The slide rod 72 is forced to move along the slide rod hole 721. The reset member 74 is compressed and stores energy. The first fastener 71 tightens the slide rod 72, and the clamping member 73 fixes the axial connection portion 122 between the shaft 2 and the inner star wheel 12. During disassembly, the reset member 74 drives the slide rod 72 along the slide rod hole 721 to return to the initial position (the position before assembly). The quick-release structure 7 ensures the axial limit reliability of the shaft 2 and the inner star wheel 12, and facilitates modular disassembly by forming the fixed section 1 as a separate module and the movable section 6 and the shaft 2 as a separate module, thereby improving maintenance convenience and facilitating troubleshooting.

[0046] In some embodiments, the engaging member 73 includes a pin 731 and a retaining spring 732. The engaging hole 76 includes a pin hole 761 and a first retaining slot 762 defined on the shaft 2. The pin 731 is positioned within the pin hole 761, and the retaining spring 732 is mounted radially outward of the pin 731 and positioned within the first retaining slot 762. In some embodiments, the connecting groove 123 includes a second retaining slot 763 that engages with the first retaining slot 762. Specifically, the pin 731 is positioned within the pin hole 761 defined radially along the shaft 2, and the retaining spring 732 is positioned outward of the pin 731. The first retaining slot 761 and the second retaining slot 762 are annular grooves. Before assembly, the limit spring 732 is set in the first limit groove 761. During assembly, when the slide rod 72 moves along the slide rod hole 721, the ejector pin 731 acts on the limit spring 732 to stretch the limit spring 732. The part of the limit spring 732 close to the axial connection part 122 enters the second limit groove 762. The limit spring 732 ensures that the second spline shaft 42 and the second spline hole 41 are not easily detached from each other.

[0047] To ensure the operation of the limiting retaining spring 732, the minimum outer diameter of the limiting retaining spring 732 (the outer diameter before expansion) is not greater than the diameter of the first limiting slot 761, and the maximum outer diameter of the limiting retaining spring 732 (the outer diameter after expansion) is between the outer diameter of the first limiting slot 761 and the outer diameter of the second limiting slot 762.

[0048] Among them, the effective length of the second spline shaft 42 and the setting position of the second spline shaft 42 can be designed according to the position of the first limiting groove 761 in the second spline hole 41 to avoid the limiting spring 732 being unable to enter the second limiting groove 762 and causing assembly failure.

[0049] Exemplarily, the ejector pin holes 761 are arranged in a ring shape, and four ejector pin holes 761 are provided.

[0050] In some embodiments, as Figure 5-Figure 9 As shown, the end of the first fastener 71 has a first curved surface 711, and the first conical surface 722 that cooperates with the first curved surface 711 is provided in the first groove 724. The end of the clamping member 73 is provided with a second curved surface 733, and the second groove 725 is provided with a second conical surface 723 that cooperates with the second curved surface 733. Before assembly, the first curved surface 711 and the first conical surface 722 are separated from each other, and the second curved surface 733 and the second conical surface 723 are also separated from each other. During assembly, when the first fastener 71 is screwed into the mounting hole 75, the first curved surface 711 acts on the first conical surface 722, causing the slide rod 72 to move along the slide rod hole 721 until the second curved surface 733 acts on the second conical surface 723. During this process, the reset member 74 is compressed and stores energy. The first curved surface 711 cooperates with the first conical surface 722, and the second curved surface 733 cooperates with the second conical surface 723, restricting the slide rod 72 from further movement within the slide rod hole 721, thereby limiting the axial movement of the shaft 2. Furthermore, the cooperation between the first curved surface 711 and the first conical surface 722 ensures that the first fastener 71 compresses the slide rod 72 to push the slide rod 72 to move, and ensures the smooth movement of the slide rod 72. The cooperation between the second curved surface 733 and the second conical surface 723 enables the ejector pin 731 to push the limiting retaining spring 732 into contact with the wall of the second limiting retaining groove 762, thereby ensuring the reliability of the connection between the inner star gear 12 and the shaft 2.

[0051] Exemplarily, the first tapered surface 722 and the second tapered surface 723 are respectively disposed on two sides of the sliding rod 72 and are symmetrically arranged.

[0052] In some embodiments, since the reset member 74 is usually in a compressed state, it has certain performance requirements for rebound after disassembly. The wave spring has a wide range of stiffness, strong buffering and vibration absorption capabilities, and large deformation energy per unit volume of material. Therefore, the reset member 74 is preferably a wave spring.

[0053] In some embodiments, the quick-release mechanism 7 further includes a retaining ring 77 disposed within the slide rod hole 721. The retaining ring 77 and the reset member 74 are located on either side of the slide rod 72 in the axial direction. In some embodiments, the reset member 74 is disposed at the end of the slide rod 72 and connected to one end of the slide rod hole 721. The retaining ring 77 is disposed at the other end of the slide rod hole 721. The retaining ring 77 acts as a buffer during the reciprocating movement of the slide rod 72.

[0054] In some embodiments, the slide bar 72 is made of medium carbon steel or bearing steel, and the ejector pin 731 is also made of medium carbon steel or bearing steel. In some embodiments, to ensure the hardness and surface roughness of the slide bar 72 and the ejector pin 731, the slide bar 72 and the ejector pin 731 are made of medium carbon steel or bearing steel. Preferably, the surfaces are hardened and then ground before processing.

[0055] Exemplarily, the first fastener 71 is a hexagonal fastening screw and is provided with an anti-loosening structure.

[0056] During processing, in order to ensure the dimensional accuracy and surface roughness requirements of the slide rod hole 721 and the ejector pin hole 761, preferably, a Swiss machine is used for processing, and boring is performed after drilling.

[0057] In some embodiments, when processing the mounting hole 75, the slide rod hole 721 and the ejector hole 761, surface quenching is first performed after drilling and then the hole walls of the mounting hole 75, the slide rod hole 721 and the ejector hole 761 are bored. When processing the mounting hole 75, if the outer diameter of the mounting hole 75 is small (for example, the diameter is less than 40 mm), a screw plug should be used to plug the mounting hole 75 during surface quenching to prevent cracks caused by heat concentration at the mounting hole 75 during quenching.

[0058] In other embodiments, a shoulder (eg, with a diameter of more than 40 mm) is provided on the outer periphery of the shaft 2 , and the shoulder is provided close to the mounting hole 75 . If the strength at the mounting hole 75 is sufficient, surface quenching may be omitted.

[0059] The assembly process of the drive shaft structure is as follows:

[0060] Before assembly, the initial state of the limit spring 732 in the shaft 2 is the contracted state, the first fastener 71, the reset member 74 and the ejector pin 731 are all in the relaxed state, and the limit spring 732 is set in the first limit groove 761;

[0061] During assembly, first assemble the movable joint 6 into the power source (such as a differential, drive motor assembly, etc.). The movable joint 6 has rolling elements and raceways. The distance between the theoretical center of the rolling elements in the movable joint 6 and the bottom of the raceway must be greater than the assembly length of the second spline shaft 42 and the second spline hole 41. This ensures that the second spline shaft 42 and the second spline hole 41 can be assembled and meshed smoothly with the sliding movement of the movable joint 6 in the Y direction (the width direction of the vehicle) of the raceway.

[0062] When the locking nut 722 is unlocked, the locking nut 720 is unlocked and the locking nut 730 is unlocked, so that the master screw 730 can be unlocked by the master screw 730. When the lock nut 722 is unlocked, the master screw 730 is unlocked and the locking nut 730 is unlocked.

[0063] If the fixing section 1 needs to be replaced, it can be achieved by loosening the first fastener 71 on the shaft 2 and then removing the tire or wheel hub decorative cover;

[0064] If the movable joint 6 needs to be replaced, loosen the first fastener 71 on the shaft 2, the first curved surface 711 is released from the first conical surface 722, the reset member 74 is released, the slide rod 72 moves along the slide rod hole 721, and then the second curved surface 733 is released from the second conical surface 723, the ejector pin 731 falls back, and the limit spring 732 returns to the first limit groove 761. Without disassembling other parts, the module formed by the movable joint 6 and the shaft 2 can be disassembled and assembled separately.

[0065] The prior art also has a drive shaft structure with flange-type connections at both ends. This solution requires the removal of multiple bolts to replace the drive shaft. Furthermore, the flange structure has a large rotation diameter, requiring a large layout space, which many vehicle models cannot accommodate. In contrast, in this solution, one end of the fixed joint housing 11 is connected to the vehicle's wheel end 5 via a first spline 3, and the other end of the inner star gear 12 is connected to the shaft 2 via a second spline 4. This structure is highly versatile and does not occupy excessive space.

[0066] A second embodiment of the present invention provides a vehicle, comprising the above-mentioned drive shaft structure.

[0067] 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.

[0068] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0069] In the description of the present invention, “plurality” means two or more.

[0070] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0071] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0072] In the description of the present invention, 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 the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0073] 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 structure, characterized in that: The invention comprises a fixed joint (1) and a shaft (2), wherein the fixed joint (1) is mounted on one end of the shaft (2), and the fixed joint (1) comprises a fixed joint housing (11) and an inner star wheel (12), one end of the fixed joint housing (11) is transmission-connected to a wheel end (5) of a vehicle, and the other end of the fixed joint housing (11) is connected to the inner star wheel (12), and one end of the inner star wheel (12) extending axially toward the shaft (2) is transmission-connected to the shaft (2) via a quick-release structure (7).

2. A drive shaft structure according to claim 1, characterized in that: The quick-release structure (7) includes a first fastener (71), a slide rod (72), a clamping member (73) and a reset member (74); a slide rod hole (721) for accommodating the slide rod (72) is provided in the shaft rod (2); a mounting hole (75) and a clamping hole (76) respectively connected to the slide rod hole (721) are provided on the shaft rod (2); a first groove (724) matched with the first fastener (71) and a second groove (725) matched with the clamping member (73) are provided on the slide rod (72); The positioning member (74) is arranged in the slide rod hole (721), one end of the reset member (74) is connected to the slide rod (72), and the other end of the reset member (74) is connected to the hole wall of the slide rod hole (721). The first fastener (71) in the mounting hole (75) can act with the slide rod (72) to drive the slide rod (72) to move, and the movement of the slide rod (72) can drive the clamping member (73) in the clamping hole (76) to move to fix or unlock the inner star wheel (12) and the shaft rod (2).

3. A drive shaft structure according to claim 2, characterized in that: The clamping member (73) includes a pin (731) and a limiting snap ring (732); the clamping hole (76) includes a pin hole (761) and a first limiting snap groove (762) provided on the shaft (2); the pin (731) is provided in the pin hole (761); the limiting snap ring (732) is installed on the radial outer side of the pin (731) and is located in the first limiting snap groove (762).

4. A drive shaft structure according to claim 3, characterized in that: The inner star wheel (12) comprises an inner star wheel body (121) and an axial connection portion (122) extending axially from the inner star wheel body (121) toward the shaft (2), and an end portion of the axial connection portion (122) is provided with a connection groove (123) connected to the shaft (2).

5. A drive shaft structure according to claim 4, characterized in that: A second limiting slot (763) is provided in the connecting groove (123) and is docked with the first limiting slot (762).

6. A drive shaft structure according to claim 2, characterized in that: The end of the first fastener (71) has a first arcuate surface (711), the first groove (724) is provided with a first conical surface (722) that matches the first arcuate surface (711), the end of the clamping member (73) is provided with a second arcuate surface (733), and the second groove (725) is provided with a second conical surface (723) that matches the second arcuate surface (733).

7. The drive shaft structure according to claim 2, characterized in that: The quick-release structure (7) further includes a retaining ring (77) disposed in the slide rod hole (721), and the retaining ring (77) and the reset member (74) are respectively located on both axial sides of the slide rod (72).

8. The drive shaft structure according to claim 3, characterized in that: The reset member (74) is a wave spring; and / or The slide bar (72) is made of medium carbon steel or bearing steel, and the ejector pin (731) is made of medium carbon steel or bearing steel.

9. The drive shaft structure according to claim 4, characterized in that: A sheath (13) is provided on the outer periphery of the axial connection portion (122), and the sheath (13) is connected to the axial connection portion (122) via a clamp (14).

10. A vehicle, characterized in that: A drive shaft structure comprising any one of claims 1-9.

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