Drive shaft assembly

Abstract

The present invention provides a drive shaft assembly, including a shaft and two end section structures, the two end section structures are respectively arranged at the two ends of the shaft, wherein at least one end section structure includes a sleeve, a shell and a first elastic member; the sleeve is arranged outside the shaft, and the sleeve rotates synchronously with the shaft; the shell forms a mounting cavity, the sleeve is located in the mounting cavity, the end of the shaft is connected to the shell, and the shaft can rotate or swing in the mounting cavity; the first elastic member is distributed along the circumference of the sleeve, and is respectively connected to the sleeve and the shell. The drive shaft assembly provided by the present invention can meet the needs of torque transmission and the needs of large-angle swing, so that the torque transmission capacity and swing capacity of the drive shaft assembly are effectively improved, thereby meeting the driving and riding needs of the vehicle on special terrain.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle parts, and in particular relates to a drive shaft assembly. Background Art

[0002] With the development of the automobile industry, users have higher and higher requirements for the driving performance of automobiles, and the drive shaft structure is an important factor affecting the vehicle driving experience. The drive shaft structure is mainly composed of a fixed joint, a shaft rod and a movable joint. The shaft rod and the movable joint, as well as the shaft rod and the fixed joint are sealed by a sleeve.

[0003] At present, the mobile joint is mainly composed of a tripod joint, a tripod bearing, an inner ball cage, a sleeve and a clamp. The internal coordination of the mobile joint is mainly to insert the shaft with a retaining ring and an outer spline into the inner star wheel with a retaining ring groove and an inner spline and the tripod shaft to transmit torque. Due to the limitation of the tripod assembly structure, the mobile joint can only transmit a smaller torque and a smaller swing range. In some models with super off-road performance, a mobile joint of this structure obviously cannot meet the off-road performance requirements of large swing angles and large torque transmission. Summary of the invention

[0004] An embodiment of the present invention provides a drive shaft assembly, aiming to improve the torque transmission and swing capabilities of the drive shaft assembly.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A drive shaft assembly is provided, comprising a shaft and two end section structures, wherein the two end section structures are respectively arranged at two ends of the shaft, wherein at least one of the end section structures comprises:

[0007] A sliding sleeve, which is sleeved outside the shaft rod, and the sliding sleeve rotates synchronously with the shaft rod;

[0008] A housing is formed with a mounting cavity, the sliding sleeve is located in the mounting cavity, an end of the shaft is connected to the housing, and the shaft can rotate or swing in the mounting cavity; and

[0009] The first elastic member is distributed along the circumference of the sliding sleeve and is respectively connected to the sliding sleeve and the housing.

[0010] In a possible implementation manner, the first elastic member includes at least one of a spring member and an elastic block.

[0011] In one possible implementation,

[0012] A plurality of sliding sleeve seats are arranged at intervals on the outer circumferential surface of the sliding sleeve;

[0013] A plurality of housing seats are provided at intervals on the inner wall of the installation cavity;

[0014] In the circumferential direction of the sliding sleeve, the sliding sleeve seats and the outer shell seats are alternately distributed, and two ends of the first elastic member are respectively connected to the outer shell seat and the sliding sleeve seat.

[0015] In a possible implementation, the shaft rod and the sleeve are slidably matched along the axial direction of the shaft rod, a transition connection assembly is provided in the mounting cavity, the transition connection assembly can elastically extend and retract along the axial direction of the outer shell, and the end of the shaft rod is connected to the outer shell through the transition connection assembly.

[0016] In a possible implementation, the transition connection component includes:

[0017] a sliding mounting seat connected to the end of the shaft passing through the sliding sleeve; and

[0018] The second elastic member is arranged on a side of the sliding mounting seat away from the shaft rod and is connected to the housing.

[0019] In a possible implementation, a positioning ball is fixedly provided at the end of the shaft rod, and the sliding mounting seat includes two seat bodies spliced ​​to each other;

[0020] The two facing ends of the two seat bodies are respectively provided with hemispherical cavities, and the two hemispherical cavities cooperate to form a ball socket adapted to the positioning ball, the depth of the ball socket is greater than the diameter of the positioning ball, and the opening inner diameter of the ball socket is smaller than the diameter of the positioning ball.

[0021] In a possible implementation, the housing includes:

[0022] A main shell, one end of which is closed and the other end of which is open, and the transition connection assembly is connected to the closed end of the main shell; and

[0023] The connecting shell is an annular component, the connecting shell is fixedly connected to the open end of the main shell, the sliding sleeve is located on the inner side of the connecting shell, and the first elastic member is respectively connected to the sliding sleeve and the connecting shell.

[0024] In a possible implementation, an intermediate structure is provided between the shaft rod through hole provided on the sliding sleeve and the shaft rod, and the intermediate structure is used to reduce the sliding friction between the shaft rod and the shaft rod through hole.

[0025] In a possible implementation, the radial cross-section of the shaft rod through hole is a non-circular cross-section, and the cross-section of the shaft rod end is a non-circular cross-section that matches the shaft rod through hole.

[0026] In one possible implementation, the shaft rod through hole is a polygonal hole, the end of the shaft rod is a polygonal prism, and the intermediate structure includes a plurality of roller needle groups corresponding to the straight side walls of the shaft rod through hole, each of the roller needle groups has a plurality of roller needles distributed axially along the shaft rod through hole, and the long axis of the roller needle is perpendicular to the axis of the shaft rod through hole.

[0027] The drive shaft assembly of the present application is provided with a first elastic member between the sleeve and the outer shell, which can meet the demand for torque transmission. At the same time, due to its good deformation ability and the fact that the shaft rod can rotate and swing in the outer shell, it can also meet the demand for large-angle swing, so that the torque transmission capacity and swing capacity of the drive shaft assembly are effectively improved, thereby meeting the driving and riding needs of the vehicle on special terrain. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a drive shaft assembly provided in Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the shaft rod used in the first embodiment of the present invention;

[0030] Figure 3 This is an exploded view of the end section structure used in the first embodiment of the present invention;

[0031] Figure 4 A cross-sectional view of the assembly structure of the end section structure and the shaft rod used in the first embodiment of the present invention;

[0032] Figure 5 for Figure 4 HH cross-sectional view;

[0033] Figure 6 for Figure 4 A left side view of the connecting shell;

[0034] Figure 7 for Figure 4 Left side view of the middle sleeve;

[0035] Figure 8 for Figure 4 BB cross-sectional view;

[0036] Fig. 9 for Figure 8 The structural diagram of the seat body on the left side of the middle;

[0037] Fig.10 for Fig. 9 CC section view;

[0038] Fig.11 for Fig.10 Right view of;

[0039] Fig.12 for Figure 8 The structural diagram of the seat body on the middle right;

[0040] Fig.13 for Fig.12 DD cross-sectional view;

[0041] Fig.14 for Fig.13 Left view of

[0042] Fig.15 for Figure 4 Schematic diagram of the structure of the middle sheath;

[0043] Fig.16 This is a schematic diagram of the assembly of the connecting housing, the sliding sleeve and the first elastic member used in the second embodiment of the present invention;

[0044] Fig.17 for Fig.16 II sectional view;

[0045] Fig.18 for Fig.16 A schematic diagram of the structure of the connecting shell;

[0046] Fig.19 for Fig.16 Schematic diagram of the structure of the middle sliding sleeve;

[0047] Fig. 20 for Fig.19 EE cross-sectional view;

[0048] Fig.21 for Fig. 20 FF cross-sectional view;

[0049] Fig. 22 This is a schematic diagram of the structure of the main housing used in the second embodiment of the present invention;

[0050] Fig.23 for Fig. 22 GG cross-sectional view;

[0051] Fig.24 This is an assembly cross-sectional view of the main housing, the sliding sleeve and the first elastic member used in the third embodiment of the present invention;

[0052] Fig.25 for Fig.24 A left view of a plurality of needle roller assemblies;

[0053] Fig.26 This is a schematic assembly diagram of the main housing, the sliding sleeve and the first elastic member used in the fifth embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 100, shaft; 110, positioning ball; 120, main body; 121, small end groove; 130, adapter section; 140, shaft shoulder;

[0056] 200, end section structure;

[0057] 210, sliding sleeve; 211, sliding sleeve seat; 212, shaft rod through hole; 213, positioning ridge; 214, retaining ring; 215, ring groove;

[0058] 220, housing; 221, main housing; 222, connecting housing; 223, large end groove; 224, housing seat;

[0059] 230, first elastic member; 231, spring member; 232, elastic block;

[0060] 240, installation cavity; 241, slide groove;

[0061] 250, transition connection assembly; 251, sliding mounting seat; 2511, seat body; 2512, hemispherical cavity; 2513, sliding edge; 2514, docking hole; 2515, docking pin; 2516, spring hole; 252, second elastic member;

[0062] 260, needle roller;

[0063] 300, sheath; 310, small end convex ring; 320, small end clamping groove; 330, large end convex ring; 340, large end clamping groove; 350, small clamp; 360, large clamp. DETAILED DESCRIPTION

[0064] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0065] Please also read Figure 1 , Figures 3 to 5 , Fig.16 , Fig.17 , Fig.24 and Fig.26The drive shaft assembly provided by the present invention is now described. The drive shaft assembly includes a shaft 100 and two end section structures 200, the two end section structures 200 are respectively arranged at the two ends of the shaft 100, wherein at least one end section structure 200 includes a sleeve 210, a housing 220 and a first elastic member 230; the sleeve 210 is sleeved outside the shaft 100, and the sleeve 210 rotates synchronously with the shaft 100; the housing 220 is formed with a mounting cavity 240, the sleeve 210 is located in the mounting cavity 240, the shaft 100 passes through the end of the sleeve 210 and is connected to the housing 220, and the shaft 100 can rotate or swing in the mounting cavity 240; the first elastic member 230 is distributed along the circumference of the sleeve, and is respectively connected to the sleeve 210 and the housing 220.

[0066] Compared with the prior art, the drive shaft assembly provided in this embodiment abandons the traditional ball pin assembly structure, and sets a first elastic member 230 between the sleeve 210 and the outer shell 220, which can meet the demand for torque transmission. At the same time, due to its good deformation ability, since the shaft rod 100 can rotate and swing in the outer shell 220, it can also meet the demand for large-angle swing, so that the torque transmission capacity and swing capacity of the drive shaft assembly are effectively improved, thereby meeting the driving and riding needs of the vehicle on special terrain.

[0067] In some embodiments, see Figures 3 to 5 , Fig.16 , Fig.17 , Fig.24 and Fig.26 The first elastic member 230 includes at least one of a spring member 231 and an elastic block 232. In this embodiment, the spring member 231 or the elastic block 232 may be used alone, or both the spring member 231 and the elastic block 232 may be used, so that the structure of the first elastic member 230 is relatively simple.

[0068] In addition, the existing drive shaft structure generally adopts a solid shaft rod with equal diameter. Due to the different lengths of the two shaft rods, the design of the fixed section and the movable section is not very reasonable, which will cause the stiffness of the left and right shaft rods to differ greatly. After the vehicle starts to accelerate suddenly, it will deviate to one side of the road, affecting driving safety. This embodiment can control the stiffness of the spring member 231 and the elastic block 232, so that the left and right shaft rods of the shaft rod 100 can achieve the purpose of equal stiffness as much as possible while meeting the requirements of torque transmission, thereby fundamentally solving the problem of deviation during rapid acceleration; at the same time, it can also effectively alleviate the impact force when transmitting torque, and achieve better NVH performance and driving comfort.

[0069] As a specific embodiment of the first elastic member 230, see Figures 3 to 5The first elastic member 230 includes a plurality of spring members 231 distributed along the circumference of the sleeve, one end of the spring member 231 is connected to the housing 220, and the other end of the spring member 231 is connected to the sleeve 210. This embodiment provides a flywheel assembly structure.

[0070] Based on the above embodiments, see Figures 3 to 7 , a plurality of sleeve seats 211 are arranged at intervals on the outer circumferential surface of the sleeve 210, and a plurality of shell seats 224 are arranged at intervals on the inner wall of the installation cavity 240; in the circumferential direction of the sleeve 210, the sleeve seats 211 and the shell seats 224 are alternately distributed, and the two ends of the spring member 231 are respectively connected to the shell seats 224 and the sleeve seats 211. The sleeve seats 2111 and the shell seats 224 provide a mounting platform for the first elastic member 230, so that the expansion and contraction direction of the first elastic member 230 conforms to the torsion direction of the sleeve 210, and follows the characteristics of the spring with large axial tension and compression resistance, which makes it easier to increase the transmission torque and meet the requirements of the shaft swing. The first elastic member 230 in this embodiment can be selected as the spring member 231.

[0071] For details, see Figures 3 to 7 In order to ensure that the end faces of the housing seat 224 and the sleeve seat 211 correspond to the spring member 231 axially as much as possible, so as to transmit a larger torque as much as possible, the sleeve seat 211 is a wedge-shaped protrusion extending in the radial direction of the sleeve 210, and the housing seat 224 is a wedge-shaped protrusion extending in the radial direction of the housing 220. The wedge-shaped spring seat occupies a small space and can meet the purpose of corresponding to and effectively connecting with the spring member 231.

[0072] As another specific embodiment of the first elastic member 230, see Fig.24 and Fig.26 The first elastic member 230 includes at least one elastic block 232 disposed around the sliding sleeve 210, the outer end of the elastic block 232 is connected to the housing 220, and the inner end of the elastic block 232 is connected to the sliding sleeve 210. This embodiment provides a suspended assembly structure.

[0073] As another specific embodiment of the first elastic member 230, see Fig.16 and Fig.17 The first elastic member 230 includes a plurality of spring members 231 and a plurality of elastic blocks 232, the spring members 231 and the elastic blocks 232 are alternately distributed along the circumference of the sliding sleeve 210, the inner end of the spring member 231 is connected to the sliding sleeve 210, and the outer end is connected to the housing 220, the inner end of the elastic block 232 is connected to the sliding sleeve 210, and the outer end is connected to the housing 220. This embodiment provides a flywheel-suspension assembly structure.

[0074] Based on the above embodiments, see Figures 3 to 5 , Fig.16 , Fig.17 , Fig.24 and Fig.26 In order to ensure uniform force, meet the torque requirements of forward rotation and flipping, and maximize the torque transmission capacity, when the spring member 231 is set alone, the spring member 231 is evenly arranged on the periphery of the sliding sleeve 210; when the elastic block 232 is set alone, the elastic block 232 is evenly arranged on the periphery of the sliding sleeve 210, or it can completely fill the interval space between the sliding sleeve 210 and the housing 220; when the elastic block 232 and the spring member 231 are used at the same time, the spring member 231 and the elastic block 232 are evenly arranged on the periphery of the sliding sleeve 210 at the same time.

[0075] It should be noted that if the elastic block 232 completely fills the interval space between the sliding sleeve 210 and the housing 220 , it can be filled by a continuous annular elastic block or by a plurality of split-type elastic blocks.

[0076] Based on the above embodiments using the spring member 231, Figure 3 , Figure 4 , Fig.16 and Fig.17 In the axial direction of the sleeve 210, there may be one spring member layer or multiple spring member layers, each of which includes multiple spring members 231 distributed along the circumference of the sleeve 210. When there are multiple spring member layers, the orthographic projections of multiple spring members 231 in the same spring member layer on the radial surface of the sleeve 210 may completely overlap (e.g., Figure 3 and Figure 4 ), or partially overlap or cross (as shown in Fig.16 and Fig.17 ), or can be completely separated (not shown).

[0077] Optional, see Figure 3 , Figure 4 , Fig.16 and Fig.17 In order to achieve maximum torque transmission performance, the spring member 231 can maintain a suitable curvature while satisfying the spatial arrangement conditions.

[0078] As another implementation of the spring member 231, not shown in the figure, the spring member 231 is an electromagnetic threaded spring. By adjusting the current and voltage strength of the spring member 231, the stiffness of the spring member 231 can be dynamically adjusted, which is beneficial to optimize its NVH performance.

[0079] Based on the above-mentioned embodiments using the elastic block 232, the elastic block 232 is a damping rubber, which can be connected to the sleeve 210 and the housing 220 by vulcanization, threaded connectors, etc., which are not listed here one by one.

[0080] In some embodiments, see Figures 3 to 5, Figures 8 to 14 The shaft 100 and the sleeve 210 are slidably matched along the axial direction of the shaft 100, and a transition connection assembly 250 is provided in the installation cavity 240. The transition connection assembly 250 can be elastically extended along the axial direction of the housing 220, and the end of the shaft 100 is connected to the housing 220 through the transition connection assembly 250. The transition connection assembly 250 of this embodiment has the ability to elastically extend along the axial direction of the housing 220, and can realize the initial limitation of the position of the sleeve 210. Under the premise of ensuring that the shaft 100 can be effectively reset, the use performance of the drive shaft assembly is enhanced, the ability to resist deformation is enhanced, and at the same time, it can buffer the external impact force and improve the NVH performance of the vehicle.

[0081] The problems of shaft disengagement, jerking when starting, abnormal noise when turning, body swaying, driving vibration and steering wheel vibration existing in existing vehicles are mainly due to the rigid connection between the shaft and the fixed joint and the movable joint, which is easy to cause damage or poor matching inside the fixed joint and the movable joint, such as the problem of gap and abnormal noise between the steel ball of the fixed joint and the retaining frame, the problem of high-frequency moving force of the three-pin joint of the movable joint, etc. On the basis of adopting the first elastic member 230, this embodiment uses a transition connection assembly 250 to realize the connection between the shaft 100 and the housing 220. The shaft 100 and the end section structure 200 are no longer rigidly connected. In addition, the problem of poor matching can be effectively avoided by reasonably setting the structure of the transition connection assembly 250, thereby eliminating the problems of vehicle jerking when starting, abnormal noise when turning, body swaying, driving vibration and steering wheel vibration caused by conventional drive shaft failure, thereby improving the NVH performance of the vehicle.

[0082] Based on the above embodiments, see Figures 3 to 5 , Figures 8 to 14 The transition connection assembly 250 includes a sliding mounting seat 521 and a second elastic member 252; the sliding mounting seat 251 is connected to the end of the shaft rod 100 passing through the sliding sleeve 210; the second elastic member 252 is arranged on the side of the sliding mounting seat 251 away from the shaft rod 100 and is connected to the housing.

[0083] In this embodiment, the transition connection assembly 250 is formed by using a sliding mounting seat 521 and a second elastic member 252. By controlling the length and rigidity of the second elastic member 252, the requirements of the transition connection assembly 250 for stretching and compression of the shaft 100 along the axial movement are met, and external vibrations can be absorbed. The shaft 100 is effectively positioned through the sliding mounting seat 521 to prevent the shaft 100 from coming out. This design effectively distinguishes different functional units in the transition connection assembly 250, making the overall design of the transition connection assembly 250 more flexible and able to better meet the requirements of various assembly performances.

[0084] On the basis of the above embodiment, the sliding mounting seat 251 and the housing 220 slide in cooperation along the axial direction of the housing 220. The housing 220 limits the sliding mounting seat 251, which is conducive to maintaining the stability of the posture of the sliding mounting seat 251, and has a restraining effect on the end of the shaft 100, which is conducive to maintaining the reliability of the posture change of the shaft 100.

[0085] As a specific implementation of the sliding mounting seat 251, see Figures 2 to 4 , Figures 8 to 14 The end of the shaft 100 is fixed with a positioning ball 110, and the sliding mounting seat 251 includes two mutually spliced ​​seat bodies 2511; the two seat bodies 2511 are respectively provided with hemispherical cavities 2512 at the facing ends, and the two hemispherical cavities 2512 cooperate to form a ball socket adapted to the positioning ball 110, the depth of the ball socket is greater than the diameter of the positioning ball 110, and the inner diameter of the opening of the ball socket is smaller than the diameter of the positioning ball 110. Among them, the outer diameter of the positioning ball 110 is smaller than the inner diameter of the shaft through hole 212, so that the positioning ball 112 can pass through the sliding sleeve 210 to realize the disassembly and assembly of the shaft 100.

[0086] This embodiment adopts a matching structure of a plurality of seats 2511 and positioning balls 110 , which can prevent the shaft rod 100 from falling out and increase the swing range of the shaft rod 100 .

[0087] On the basis of the above embodiment, the two seat bodies 2511 are respectively slidably matched with the outer shell 220, so that the two seat bodies 2511 can achieve shape and position fit and small clearance fit with the main shell 221, which can realize axial movement of the shaft 100 and effectively avoid gap noise caused by poor fit.

[0088] As an implementation method of the sliding cooperation between the seat body 2511 and the housing 220, see Figures 8 to 14 , Fig. 22 and Fig.23 The inner wall of the installation cavity 240 is provided with a slide groove 241 parallel to the axial direction of the housing 220, and the opposite ends of the two seat bodies 2511 are provided with a sliding edge 2513 that slides with the slide groove 241. This embodiment realizes shape and position matching and small clearance matching through the sliding edge 2513 and the slide groove 241, which can not only realize the movement of the sliding installation seat 251 along the axial direction of the housing 220, but also meet the requirements of its own circumferential limit, and effectively limit the rotation of the sliding installation seat 251.

[0089] It should be noted that the shape and position matching and small clearance matching between the sliding edge 2513 and the sliding groove 241 need to be ensured, so as to control the running trajectory of the sliding mounting seat 251 while meeting the sliding requirements.

[0090] As a specific method of the docking structure between the two base bodies 2511, refer to Figures 8 to 14, a docking hole 2514 is provided at the docking end of one of the base bodies 2511, and a docking pin 2515 is provided on the other base body 2511 to be plugged into the docking hole 2514. When the docking surfaces of the two base bodies 2511 are completely fitted, the docking pin 2515 is also plugged into the docking hole 2514. This embodiment uses a positioning pin hole structure to achieve accurate positioning of the two base bodies 2511, has a simple structure, reliable positioning, and cooperates with the limit of the sliding edge 2513 and the sliding groove 241 to effectively ensure that the two base bodies 2511 will not be released from the docking relationship during use.

[0091] Based on the above embodiment, the two seats 2511 can be distributed along the X-axis or along the Z-axis.

[0092] For details, see Figure 3 and Figure 4 The second elastic member 252 is a positioning spring, one end of which is connected to the housing 220, and the other end is connected to the sliding mounting seat 251. The positioning spring and the housing can be connected by welding, threaded connectors, etc. The sliding mounting seat 251 can be provided with a spring hole 2516, and the other end of the positioning spring is hung on the spring hole 2516.

[0093] Optionally, one end of the positioning spring can be connected to the housing 220 by welding or other methods.

[0094] Based on the above embodiments, see Figure 4 , Figures 9 to 14 The butt joint ends of the two seat bodies 2511 are respectively provided with corresponding protrusions, and the two protrusions are respectively provided with corresponding spring holes 2516. When the two seat bodies 2511 are butt jointed, the two protrusions can also fit together, so that the two spring holes 2516 form a whole, which is convenient for the positioning spring to hang. The same positioning spring can apply force to the two seat bodies 2511 at the same time, so that the overall force of the sliding mounting seat 251 is more uniform.

[0095] As a specific embodiment of the housing 220, see Figure 1 , Figures 3 to 6 , Figure 8 , Figures 16 to 18 , Figure 22 to Figure 24 and Fig.26 The outer shell 220 includes a main shell 221 and a connecting shell 222; one end of the main shell 221 is closed and the other end is open, and the transition connection assembly 250 is connected to the closed end of the main shell 221; the connecting shell 222 is an annular component, and the connecting shell 222 is fixedly connected to the open end of the main shell 221. The sliding sleeve 210 is located on the inner side of the connecting shell 222, and the first elastic member 230 is respectively connected to the sliding sleeve 210 and the connecting shell 222.

[0096] Optional, see Figure 1 , Figures 3 to 6 , Figure 8 , Figures 16 to 18 , Figure 22 to Figure 24 and Fig.26 The main housing 221 and the connecting housing 222 are respectively provided with flange structures with mounting through holes, and threaded connectors penetrate the mounting through holes on the two flange structures to achieve connection between the main housing 221 and the connecting housing 222.

[0097] It should be noted that if the spring member 231 is used, it is necessary to ensure that the width of the spring member 231 in the axial direction of the housing 220 does not exceed the axial end surfaces of the sliding sleeve 210 and the connecting housing 222 .

[0098] In some embodiments, see Figures 2 to 5 , Fig.16 and Fig.17 , Figures 19 to 21 , Fig.24 and Fig.26 An intermediate structure is provided between the shaft rod through hole 212 opened on the sliding sleeve 210 and the shaft rod 100, and the intermediate structure is used to reduce the sliding friction between the shaft rod 100 and the shaft rod through hole 212, thereby further optimizing the NVH performance.

[0099] Based on the above embodiments, see Figures 2 to 5 , Fig.16 and Fig.17 , Figures 19 to 21 , Fig.24 and Fig.26 The radial cross section of the shaft hole 212 is a non-circular cross section (e.g., a polygonal cross section, an elliptical cross section, etc.), and the cross section of the end of the shaft 100 is a non-circular cross section that matches the shaft hole 212. This matching method can not only realize the transmission of torque, but also facilitate the control of sliding friction through the intermediate structure.

[0100] For more details, see Figures 2 to 5 , Figure 7 and Figure 8 , Fig.16 , Fig.17 , Figures 19 to 21 , Fig.24 and Fig.26 The shaft through hole 212 is a polygonal hole, the end of the shaft 100 is a polygonal prism, and the intermediate structure includes a plurality of needle roller groups corresponding to the straight side walls of the shaft through hole 212, each needle roller group has a plurality of needle rollers 260 distributed along the axial direction of the shaft through hole 212, and the long axis of the needle roller 260 is perpendicular to the axis of the shaft through hole 212.

[0101] For example, the shaft hole 212 of the embodiment shown in the drawings is a square hole. Fig.25It can be seen that there are four needle roller assemblies, which are respectively attached to different side wall surfaces of the shaft rod through hole 212 .

[0102] In some embodiments, see Fig.21 In order to avoid interference between adjacent needle roller groups, positioning ridges 213 are formed between adjacent side edges of the polygonal hole to achieve effective positioning of the needle roller 260 in the axial direction.

[0103] In some embodiments, see Figure 3 , Figure 4 , Fig.17 , Fig. 20 and Fig.24 Both ends of the shaft rod through hole 212 are provided with limiting structures for limiting the roller needle 260 to prevent the roller needle 260 from falling off from the shaft rod through hole 212.

[0104] For example, see Figure 3 , Figure 4 , Fig.17 , Fig. 20 and Fig.24 Circular limiting sections are formed at both ends of the shaft rod through hole 212, and an annular groove 215 is opened in the limiting section. A retaining ring 214 can be installed in the annular groove 215. Both ends of each needle roller group are limited by the retaining ring 214, which effectively limits the axial displacement of the needle roller group along the shaft rod through hole 212.

[0105] Of course, the assembly of limiting structures such as limiting plates can also be achieved by connecting the two ends of the shaft rod through hole 212 through threaded connectors, as long as the requirements of spatial assembly and limiting functions are met, and they will not be listed one by one here.

[0106] In some embodiments, see Figure 1 , Figure 3 , Figure 4 , Fig. 22 and Fig.23 The housing 220 as a whole is a structure with one end closed and the other end open, and a sheath 300 is provided at the open end to achieve sealing.

[0107] For details, see Figures 2 to 4 and Fig.15The shaft 100 includes a main body 120 and an adapting section 130. The main body 120 may be cylindrical. The adapting section 130 is adapted to the inner hole of the sliding sleeve and may be in the shape of a polygonal prism. The outer diameter of the adapting section 130 is smaller than the outer diameter of the main body 120, and a shaft shoulder 140 is formed between the main body 120 and the adapting section 130. The positioning ball 110 is arranged at one end of the adapting section 130 away from the main body 120. In order to achieve a sealed assembly with the sheath 300, the inner wall of the small end of the sheath 300 is provided with a small end convex ring 310, and the outer wall forms a small end clamping groove 320; the inner wall of the large end of the sheath 300 is provided with a large end convex ring 330, and the outer wall forms a large end clamping groove 340; the main body 120 is provided with a small end groove 121 adapted to the small end convex ring 310, and the outer wall of the housing 220 (for example, on the outer wall of the connecting shell 222) is provided with a large end groove 223 adapted to the large end convex ring 330. After the shaft 100 and the end section structure 200 are assembled, the small end convex ring 310 is inserted into the small end groove 121, the large end convex ring 330 is inserted into the large end groove 223, and the small clamp 350 is inserted into the small end groove 320, and the large clamp 360 is inserted into the large end groove 340, thereby achieving a sealed assembly between the two ends of the sleeve 300 and the shaft 100 and the outer shell 220.

[0108] It should be noted that the position of the shoulder 140 (ie, the length of the adapting section) needs to be properly controlled to meet the sliding requirements of the shaft 100 while meeting the assembly requirements.

[0109] The assembly process of the drive shaft assembly of this application is:

[0110] 1) Connect the two ends of the spring member 231 to the housing 220 (or the housing seat 224) and the sliding sleeve 210 (or the sliding sleeve seat 211) respectively, so that the spring member 231 is symmetrical and evenly distributed between the housing 220 and the sliding sleeve 210;

[0111] 2) Insert the needle roller 260 into the shaft through hole 212, and then insert the retaining ring 214 into the ring groove 215 to complete the positioning of the needle roller 260. At this point, the flywheel assembly structure is completed, and the flywheel assembly structure can be disassembled in the reverse direction. It should be noted that the assembly of the suspension assembly structure and the flywheel-suspension assembly structure can also be completed according to the above process, which will not be repeated here;

[0112] 3) Insert the small end of the sheath 300 into the shaft 100 from the end provided with the positioning ball 110 without affecting the subsequent assembly, and then insert the positioning ball 110 into the shaft through hole 212 of the sliding sleeve 210 until the adapter section 130 is in full contact with the roller needle 260;

[0113] 4) Insert the small end convex ring 310 into the small end groove 121, and insert the large end convex ring 330 into the large end groove 223, then insert the small clamp 350 into the small end groove 320 and lock it, and insert the large clamp 360 into the large end groove 340 and lock it, and the assembly of the sleeve 300 is completed. The assembly of the shaft 100 and the flywheel assembly structure, the suspension assembly structure or the flywheel-suspension assembly structure is completed, and the disassembly can be completed by the reverse operation, which will not be repeated here;

[0114] 5) Align the hemispherical cavities 2512 of the two seat bodies 2511 with the positioning balls 110 respectively, and insert the docking pin 2515 on one seat body 2511 into the docking hole 2514 on the other seat body 2511 for docking, until the docking surfaces of the two seat bodies 2511 are completely fitted together;

[0115] 6) Connect one end of the positioning spring to the main shell 221, and stretch the other end and pass it through the spring hole 2516 on the two seat bodies 2511 to achieve hanging cooperation; align the two sliding edges 2513 on the two seat bodies 2511 with the sliding grooves 241 on the inner wall of the main shell 221 respectively, and as the positioning spring contracts, the shaft rod 100 is driven to move into the main shell 221 until it reaches the node position in the main shell 221 (the initial position that satisfies the movement performance of the main shell 221). At this time, the flange structures on the main shell 221 and the connecting shell 222 are docked, and locking is achieved through threaded connectors, that is, the assembly of the end section structure and the shaft rod 100 is completed, and the reverse operation can be used to achieve disassembly.

[0116] In general, the end section structure is divided into a mobile section and a fixed section. The mobile section can be set to the end section structure provided in this application, while the fixed section still adopts a conventional structure; or the fixed section can be set to the end section structure provided in this application, while the mobile section still adopts a conventional structure; or both the fixed section and the mobile section can be set to the end section structure provided in this application. The scope of use of the end section structure is selected according to the performance requirements of the vehicle, thereby effectively improving the performance of the drive shaft assembly of this application and expanding the scope of application.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drive shaft assembly, comprising a shaft and two end section structures, wherein the two end section structures are respectively arranged at two ends of the shaft, characterized in that: At least one of the end section structures comprises: A sliding sleeve, which is sleeved outside the shaft rod, and the sliding sleeve rotates synchronously with the shaft rod; A housing is formed with a mounting cavity, the sliding sleeve is located in the mounting cavity, an end of the shaft is connected to the housing, and the shaft can rotate or swing in the mounting cavity; and A first elastic member is distributed along the circumference of the sliding sleeve and is respectively connected to the sliding sleeve and the housing; The shaft rod and the sliding sleeve are slidably matched along the axial direction of the shaft rod, a transition connection assembly is provided in the installation cavity, the transition connection assembly can be elastically retracted along the axial direction of the shell, and the end of the shaft rod is connected to the shell through the transition connection assembly; An intermediate structure is provided between the shaft rod through hole provided on the sliding sleeve and the shaft rod, and the intermediate structure is used to reduce the sliding friction between the shaft rod and the shaft rod through hole; The radial cross section of the shaft rod through hole is a non-circular cross section, and the cross section of the shaft rod end is a non-circular cross section adapted to the shaft rod through hole; The shaft rod through hole is a polygonal hole, the end of the shaft rod is a polygonal prism, and the intermediate structure includes a plurality of needle roller groups corresponding to the straight side walls of the shaft rod through hole respectively, each of the needle roller groups has a plurality of needle rollers distributed along the axial direction of the shaft rod through hole, and the long axis of the needle roller is perpendicular to the axis of the shaft rod through hole.

2. The drive shaft assembly according to claim 1, characterized in that: The first elastic member includes at least one of a spring member and an elastic block.

3. The drive shaft assembly according to claim 1, characterized in that: A plurality of sliding sleeve seats are arranged at intervals on the outer circumferential surface of the sliding sleeve; A plurality of housing seats are provided at intervals on the inner wall of the installation cavity; In the circumferential direction of the sliding sleeve, the sliding sleeve seats and the outer shell seats are alternately distributed, and two ends of the first elastic member are respectively connected to the outer shell seat and the sliding sleeve seat.

4. The drive shaft assembly according to claim 1, characterized in that: The transition connection component comprises: a sliding mounting seat connected to the end of the shaft passing through the sliding sleeve; and The second elastic member is arranged on a side of the sliding mounting seat away from the shaft rod and is connected to the housing.

5. The drive shaft assembly according to claim 4, characterized in that: A positioning ball is fixedly arranged at the end of the shaft rod, and the sliding mounting seat comprises two seat bodies spliced ​​to each other; The two facing ends of the two seat bodies are respectively provided with hemispherical cavities, and the two hemispherical cavities cooperate to form a ball socket adapted to the positioning ball, the depth of the ball socket is greater than the diameter of the positioning ball, and the opening inner diameter of the ball socket is smaller than the diameter of the positioning ball.

6. The drive shaft assembly according to claim 1, characterized in that: The housing comprises: A main shell, one end of which is closed and the other end of which is open, and the transition connection assembly is connected to the closed end of the main shell; and The connecting shell is an annular component, the connecting shell is fixedly connected to the open end of the main shell, the sliding sleeve is located on the inner side of the connecting shell, and the first elastic member is respectively connected to the sliding sleeve and the connecting shell.

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