CN214945866U - Driving shaft assembly and vehicle - Google Patents

Abstract

The utility model provides a driving shaft assembly and a vehicle, which comprises a shaft lever, a universal joint component, a sheath, a first fixing piece and a second fixing piece; the protective sleeve is sleeved at the joint of the universal joint component and the shaft rod and is provided with a first end part connected with the shaft rod and a second end part connected with the universal joint component, and a wave trough and a wave crest which are sequentially and continuously arranged from inside to outside along the radial direction of the protective sleeve are formed on the main body of at least one protective sleeve; the first fixing piece is arranged at the first end part, the inner surface of the first end part of at least one sheath is provided with a first bulge, and the shaft rod is provided with a first groove so as to limit the relative position of the first end part and the shaft rod in the axial direction of the shaft rod; the second fixing piece is arranged at the second end part. The utility model provides a drive shaft assembly and vehicle promote the operable space of peripheral part, eliminate the abnormal sound that sheath lateral wall looks mutual friction sent under the big pivot angle condition, guarantee with the position reliability and the connection leakproofness of axostylus axostyle junction.

Description

Driving shaft assembly and vehicle

Technical Field

The utility model belongs to the technical field of the vehicle spare part, concretely relates to drive shaft assembly and vehicle.

Background

The drive shaft is used for transmitting power between the differential mechanism and the drive wheel, is an important part in a drive mechanism, mainly comprises a drive shaft lever and universal joint assemblies arranged at two ends of the drive shaft lever, and is often covered with a sheath at the connection part of the drive shaft lever and the universal joint assemblies in order to ensure the performances of dust prevention, sealing, lubricating grease maintaining and the like. The existing sheath mostly adopts a structure that a plurality of layers of wave crests and wave troughs which are concave and convex along the radial direction of the sheath are alternately arranged, and is made of rubber plastic or rubber material, in order to meet the requirements of a large swing angle and the requirements of matched section specifications, the size of the sheath is designed to be larger, and higher requirements are provided for a semi-axis installation space; in addition, in many SUV vehicle types, as the ground clearance of the vehicle is larger, a driving shaft can generate a larger swing angle in the driving process, under the limit working condition, all wave crest pieces of the sheath are tightly attached, friction abnormal sound is generated under the pushing of torque, and particularly under the condition that the material performance of the sheath is reduced in a cold environment, the friction abnormal sound is more obvious and is transmitted into the vehicle through the hub, the shock absorber and the vehicle body to influence the driving feeling; in addition, in the conventional technology, the two ends of the sheath are respectively attached to the shaft rod and the universal joint component through the hoop structures, but the joint between the end part of the sheath and the shaft rod may be displaced, so that the reliability of the position and the tightness of the connection are affected.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a drive shaft assembly and vehicle aims at realizing reducing the drive shaft space design degree of difficulty, promotes peripheral part and controls the space, can satisfy the requirement of big pivot angle telescopic performance, avoids producing the friction abnormal sound, and simultaneously, it is reliable to guarantee the sealing connection between sheath and the axostylus axostyle, avoids taking place the displacement.

In order to achieve the above object, the utility model adopts the following technical scheme:

in a first aspect, there is provided a drive shaft assembly comprising:

a shaft lever;

the two universal joint components are respectively arranged at two ends of the shaft lever;

the sheath is sleeved at the joint of the universal joint component and the shaft rod, the sheath is provided with a first end part connected with the shaft rod and a second end part connected with the universal joint component, the main body of at least one of the sheaths is provided with a wave trough and a wave peak which are sequentially and continuously arranged from inside to outside along the radial direction of the sheath, the wave trough is sunken towards the second end part along the axial direction of the sheath, and the wave peak is raised towards the first end part along the axial direction of the sheath;

the first fixing piece is arranged at the first end part and used for enabling the first end part to be tightly attached to the shaft rod, a first protrusion is arranged on the inner surface of the first end part of at least one sheath, a first groove corresponding to the first protrusion is formed in the shaft rod, and the first protrusion is matched with the first groove so as to limit the relative position of the first end part and the shaft rod in the axial direction of the shaft rod; and

and the second fixing piece is arranged at the second end part and used for enabling the second end part to be tightly attached to the universal joint component.

In a possible implementation manner, a second protrusion is arranged at the bottom of the first groove, and the second protrusion is used for being in sealing and abutting contact with the inner ring surface of the first protrusion.

In one possible implementation, the inner edge of the trough forms a straight extension extending to the first end, the straight extension being spaced apart from the shaft.

In a possible implementation manner, a first transition section is further disposed between the straight extending section and the first end portion, an inner surface of the first transition section is a smooth curved surface protruding inwards, an inner diameter of the first transition section gradually increases along a preset direction, and the preset direction is a direction from the first end portion to the second end portion.

In a possible implementation manner, the shaft rod is provided with a contraction section corresponding to the straight extension section, the contraction section and the main body of the shaft rod are transited through a second transition section corresponding to the first transition section, an outer surface of the second transition section is a smooth curved surface protruding outwards, and an outer diameter of the second transition section is gradually reduced along the preset direction.

In a possible implementation manner, the second end portion is provided with a plurality of second grooves distributed at intervals along the axial direction of the sheath, the outer periphery of the universal joint component is provided with a plurality of third protrusions corresponding to the second grooves, and the third protrusions are matched with the second grooves to limit the relative position of the second end portion and the universal joint component in the axial direction of the universal joint component.

In a possible implementation manner, a fourth protrusion is arranged on the outer peripheral surface of the second end portion, and the second fixing piece is in abutting contact with the outer side surface of the fourth protrusion.

In a possible implementation manner, two sets of first limiting protrusions are arranged on the outer peripheral surface of the first end portion and are distributed at intervals in the axial direction of the sheath, so that the first fixing piece is limited in the axial direction of the sheath; the outer peripheral surface of the second end portion is provided with two groups of second limiting bulges which are distributed at intervals along the axial direction of the sheath, so that the second fixing piece is limited in the axial direction of the sheath.

In one possible implementation, an end face of the joint assembly facing the shaft and an outer circumferential surface of the joint assembly are rounded off.

In the embodiment of the application, the sheath is provided with a wave trough and a wave crest which are sequentially arranged from inside to outside along the radial direction of the sheath, compared with the traditional sheath structure, the radial size of the sheath is reduced, the operable space of peripheral parts is improved, the design difficulty is reduced, and the design and space arrangement requirements of the multi-connecting-rod suspension are met; under the condition of a large swing angle, the side walls of the wave crests are inclined to the inner side to shrink, so that the performance requirement of the large swing angle can be met, and meanwhile, the condition that adjacent wave crests are extruded mutually does not exist, abnormal sound caused by mutual friction of the side walls of the protective sleeve under the condition of the large swing angle is eliminated, and the driving feeling is improved; and, owing to set up first arch and first recess and injectd the axial position of sheath and axostylus axostyle, the compressing tightly effect of cooperation first mounting, the positional stability between the first end of sheath and the axostylus axostyle is good, can not take place along the axial displacement of axostylus axostyle, the effectual reliability of guaranteeing the position and the leakproofness of connecting.

In a second aspect, the present embodiment also provides a vehicle including the above-described drive shaft assembly.

The beneficial effect of the vehicle that this practicality provided is the same with the beneficial effect of above-mentioned drive shaft assembly, no longer gives unnecessary details here.

Drawings

Fig. 1 is a schematic front view of a driving shaft assembly according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a partial cross-sectional view of the sheath and shaft assembly of FIG. 1 having a peak and a valley and one of the gimbal assemblies in a-direction;

FIG. 4 is an enlarged view of the portion B of FIG. 3;

FIG. 5 is an enlarged view of section C of FIG. 3;

fig. 6 is an exploded view of a drive shaft assembly according to an embodiment of the present invention;

FIG. 7 is a schematic view of the construction of the sheath of FIG. 6 having one peak and one valley;

FIG. 8 is a front view of the sheath of FIG. 7;

FIG. 9 is a schematic front view of the outer cage of FIG. 6;

fig. 10 is a schematic view of an operating state of the driving shaft assembly according to the second embodiment of the present invention.

Description of reference numerals:

1. a shaft lever; 101. a first groove; 102. a second protrusion; 103. a contraction section; 104. a second transition section;

2. a gimbal assembly; 201. a third protrusion; 202. round corners; 203. a holder; 204. a steel ball; 205. shaft lever clamp spring; 206. an inner star wheel; 207. an outer ball cage; 208. a window; 209. a limiting boss;

3. a sheath; 301. a first end portion; 302. a second end portion; 303. a trough of a wave; 304. wave crest; 305. a first protrusion; 306. a straight extension section; 307. a first transition section; 308. a second groove; 309. a fourth protrusion; 310. a first limit protrusion; 311. a second limit bulge;

4. a first fixing member; 5. and a second fixing member.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the term "inner" in the embodiments of the present application refers to a direction toward the shaft central axis, the sheath central axis and the joint assembly central axis, and vice versa "outer".

Referring to fig. 1 to 3, 5, 6, 8 and 10, the driving shaft assembly of the present invention will now be described. The drive shaft assembly comprises a shaft rod 1, a universal joint component 2, a sheath 3, a first fixing piece 4 and a second fixing piece 5; two universal joint components 2 are arranged, and the two universal joint components 2 are respectively arranged at two ends of the shaft lever 1; the sheath 3 is sleeved at the joint of the universal joint component 2 and the shaft rod 1, the sheath 3 is provided with a first end part 301 connected with the shaft rod 1 and a second end part 302 connected with the universal joint component 2, the main body of at least one of the sheaths 3 is provided with a wave trough 303 and a wave crest 304 which are sequentially and continuously arranged from inside to outside along the radial direction of the sheath 3, the wave trough 303 is sunken towards the second end part 301 along the axial direction of the sheath 3, and the wave crest 304 is raised towards the first end part 301 along the axial direction of the sheath 3; the first fixing member 4 is disposed at the first end portion 301, and is used for enabling the first end portion 301 to be tightly attached to the shaft rod 1, the inner surface of the first end portion of at least one of the sheaths 3 is provided with a first protrusion 305, the shaft rod 1 is provided with a first groove 101 corresponding to the first protrusion 305, and the first protrusion 305 is matched with the first groove 101 to define the relative position of the first end portion 301 and the shaft rod 1 in the axial direction of the shaft rod 1; the second fixing member 5 is disposed at the second end portion 302, and is used for making the second end portion 302 closely attached to the gimbal assembly 2.

Compared with the prior art, the driving shaft assembly provided by the embodiment has the advantages that the sheath 3 is provided with the wave trough 303 and the wave crest 304 which are sequentially arranged from inside to outside along the radial direction of the sheath, compared with the traditional sheath structure, the radial size of the sheath 3 is reduced, the operable space of peripheral parts is increased, the design difficulty is reduced, the requirements of multi-connecting-rod suspension design and space arrangement are met, and the swing angle range of the driving shaft can be increased; under the condition of a large swing angle, the side walls of the wave crests 304 tend to contract towards the inner side, so that the performance requirement of the large swing angle can be met, and meanwhile, the condition that adjacent wave crests are mutually extruded does not exist, abnormal sound caused by mutual friction of the side walls of the sheath under the condition of the large swing angle is eliminated, and the driving feeling is improved; in addition, the first protrusion 305 and the first groove 101 are arranged to limit the axial positions of the sheath 3 and the shaft rod 1, and the first fixing piece 4 is matched to compress, so that the position stability between the first end 301 of the sheath 3 and the shaft rod 1 is good, the axial displacement along the shaft rod 1 cannot occur, and the position reliability and the connection sealing performance are effectively guaranteed.

The structure of the sheath 3 also has the advantages of weight reduction and environmental protection, and the material usage amount of the sheath 3 can be greatly reduced due to the structure that the sheath 3 has a single wave crest and a single wave trough, so that the purposes of weight reduction and environmental protection are achieved.

In addition, under the general condition, for improving whole car travelling comfort, adopt the superior many connecting rods suspension structure of performance, here wheel hub unit space is narrow and small, the drive shaft assembly is accomplished the back, the clearance between sheath and the bumper shock absorber is less, the drive shaft is under high-speed moving's the condition, the frictional heating is produced between the inside part of universal joint subassembly, the heat passes through lubricating grease and transmits the sheath, can cause the inflation of sheath to a certain extent, if adopt traditional sheath structure, the sheath inflation back, probably take place to interfere with the bumper shock absorber under the extreme condition, cause the sheath to break, sealed inefficacy, lead to the inside part of universal joint subassembly to take place the friction after the grease is revealed, also can produce the abnormal sound. The drive shaft assembly that this embodiment provided, because the radial dimension of sheath 3 compares traditional sheath structure and reduces, the operational space of peripheral part increases, and then has increased the interval between bumper shock absorber and the sheath, has effectively avoided the sheath inflation back to take place to interfere with the bumper shock absorber, and then has avoided the condition of sheath fracture oil leak.

It should be noted that the wave trough 303 needs to keep a certain distance from the end surface of the universal joint assembly 2, so as to prevent the universal joint assembly 2 from scratching the sheath 3; however, the excessive concave angle of the wave trough 303 is avoided, and the damage to the sheath 3 caused by foreign matters mixed in the wave trough 303 is prevented; at the same time, the bottom of the wave trough 303 and the top of the wave crest 304 are kept at a proper distance in the radial direction of the sheath to avoid mutual contact.

Specifically, in the present application, one of the two gimbal assemblies 2 is a fixed joint (the left gimbal assembly 2 in fig. 1), and the other is a moving joint (the right gimbal assembly 2 in fig. 1), the sheath 3 may be separately disposed at the fixed joint or the moving joint, and another sheath of another structure, for example, a conventional sheath of a multi-wave peak and multi-wave trough structure, may be disposed at the other gimbal assembly 2, as shown in fig. 1, 2 and 6; the two universal joint assemblies 2 may also use the above sheath structure, as shown in fig. 10, and are set according to actual use requirements, so as to meet the requirements of different pivot angles.

Optionally, in this embodiment, the sheath 3 having a single wave trough and a single wave crest is preferentially applied to the fixing section to meet the arrangement requirement of a narrow space; if the arrangement angle of the whole vehicle is smaller, the whole vehicle can be used on the movable joint at the same time, and further the weight of the driving shaft assembly is reduced to the maximum extent.

In some embodiments, the sheath 3 may be made of rubber or plastic. If the rubber plastic material is adopted, the wax component is added into the material, and can be separated out in the bending and rotating processes, so that the functions of reducing friction and noise are further achieved.

Referring to fig. 1 to 6 and 10, in order to facilitate assembly and ensure reliability of assembly, the first fixing member 4 and the second fixing member 5 are clip type fixing members. The clamp formula mounting can encircle the application of force in first end 301 and second end 302 department, guarantees that first end 301 and second end 302 can seal respectively and laminate in axostylus axostyle 1 and universal joint subassembly 2 to guarantee the leakproofness of assembly, and then play the protection grease and avoid polluting, promote the effect of drive shaft motion performance.

On the basis of the above embodiment, in order to ensure that the sheath 3 is not subjected to external force in a natural state and to improve the durability of the sheath 3, the internal pressure of the sheath 3 after assembly should be ensured to be 0.1 MPa; in order to ensure the high temperature resistance and the low temperature resistance of the sheath 3, the material for manufacturing the sheath 3 should meet the requirement that the sheath is not allowed to crack under the high and low temperature durability of minus 40 ℃ to 120 ℃; in order to meet the spatial arrangement requirement of the suspension, the rotary expansion amount of the sheath 3 is less than 8 mm.

Referring to fig. 3, 5 and 8, in some embodiments, the bottom of the first groove 101 is provided with a second protrusion 102, and the second protrusion 102 is used for sealing and abutting against the inner annular surface of the first protrusion 305. The second projection 102 can increase the abutting force with the first projection 305, thereby facilitating the sealing performance.

Referring to fig. 3, 5 and 8, on the basis of the above embodiment, the inner side surface of the first protrusion 305 is also provided with a groove structure at a position corresponding to the second protrusion 102, the groove structure is more obvious in a free state (as shown in fig. 8), and after the assembly, because the first protrusion 305 and the first groove 101 are in interference fit, the first protrusion 305 and the side wall of the first groove 101 are subjected to frictional deformation, and the groove structure is stretched out and is less obvious (as shown in fig. 5).

Referring to fig. 1 to 3, 5, 7, 8 and 10, in some embodiments, the inner edge of the trough 303 forms a straight extension 306 extending to the first end 301, and the straight extension 306 is spaced apart from the shaft 1. The straight extension section 306 enables the sheath 3 to be attached to the shaft lever 1 as much as possible, which is beneficial to further reducing the radial size of the sheath 3; and the clearance between straight extension section 306 and axostylus axostyle 1 can effectively cushion the impact of colliding with of foreign matter to sheath 3, and then effectively prevents that lubricating grease from revealing.

Referring to fig. 3 and 5, on the basis of the above embodiment, a first transition section 307 is further disposed between the straight extending section 306 and the first end 301, an inner surface of the first transition section 307 is a smooth curved surface protruding inward, and an inner diameter of the first transition section 307 gradually increases along a predetermined direction, which is a direction from the first end 303 to the second end 302. The round curved surface in this embodiment is annular.

The forming process of the sheath 3 is substantially: the first end 301 is injection molded → the rest of the sheath 3 is stretch → integrally blow molded. The first transition section 307 is provided to ensure a proper gap between the straight extension section 306 and the shaft rod 1, and the first transition section 307 is located at a position where injection molding and blow molding are combined, where material properties are affected to become a stress weak position, and by providing the smooth curved surface, the thickness of the first transition section 307 can be increased as much as possible, and meanwhile, stress concentration of the first transition section 307 is avoided, so that the sheath 3 can be prevented from being broken at the first transition section 307.

Referring to fig. 3 and 5, on the basis of the above embodiment, in order to ensure that a proper gap can be formed between the straight extending section 306 and the shaft rod 1 and avoid the first transition section 307 from extending in an outer dimension, the shaft rod 1 is provided with the contracting section 103 corresponding to the straight extending section 306, the outer diameter of the contracting section 103 is slightly smaller than the outer diameter of the main body of the shaft rod 1, the contracting section 103 and the main body of the shaft rod 1 are transited by the second transition section 104 corresponding to the first transition section 307, the outer surface of the second transition section 104 is a smooth curved surface protruding outwards, and the outer diameter of the second transition section 104 is gradually reduced along a predetermined direction. The round curved surface in this embodiment is annular. The smooth curved surface on the inner side of the second transition section 104 can prevent the sheath 3 from being scratched, and meanwhile, a transition area is arranged between the close fit of the first end portion 301 and the shaft rod 1 and the separation fit of the straight extension portion 306 and the shaft rod 1, so that the requirement of deformation of the sheath 3 is met.

Referring to fig. 3, 4, and 6 to 8, in some embodiments, the second end portion 302 defines a plurality of second grooves 308 distributed at intervals along the axial direction of the sheath 3, the outer periphery of the gimbal assembly 2 defines a plurality of third protrusions 201 corresponding to the second grooves 308, and the third protrusions 201 are matched with the second grooves 308 to define the relative positions of the second end portion 302 and the gimbal assembly 2 in the axial direction of the gimbal assembly 2.

The second groove 308 and the third protrusion 201 are matched with each other, so that the pre-positioning effect on the second end portion 302 is achieved during initial assembly, the compression effect of the second fixing piece 5 can be matched, the position stability between the second end portion 302 and the universal joint component 2 is improved, the axial displacement of the universal joint component 2 is avoided, and the position reliability and the connection sealing performance are effectively guaranteed; meanwhile, the second groove 308 and the third protrusion 201 are respectively provided with a plurality of protrusions, so that the contact area of the limiting structure is increased, and the reliability of limiting is improved.

Referring to fig. 3, 4, 6 to 8, in some embodiments, a fourth protrusion 309 is disposed on an outer circumferential surface of the second end portion 302, and the second fixing member 5 is in abutting contact with an outer side surface of the fourth protrusion 309. The fourth protrusion 309 reduces the contact area between the second end portion 302 and the second fixing member 5, but through the dispersed contact points, each fourth protrusion 309 can be guaranteed to be in effective contact with the second fixing member 5, so that the pressure of the second fixing member 5 can be uniformly dispersed, and the installation reliability is improved.

Referring to fig. 3 to 8, in some embodiments, two sets of first limiting protrusions 310 are disposed on the outer circumferential surface of the first end portion 303 and spaced apart from each other in the axial direction of the sheath 3 to limit the first fixing element 4 in the axial direction of the sheath 3; the outer peripheral surface of the second end portion 302 is provided with two sets of second limiting protrusions 311 distributed at intervals along the axial direction of the sheath 3 so as to limit the second fixing member 5 in the axial direction of the sheath 3.

The first limiting protrusion 310 can play a role in pre-positioning the first fixing member 4 when the first fixing member 4 is installed, so that the first fixing member 4 can be further fixed conveniently. The second position-limiting protrusion 311 functions similarly to the first position-limiting protrusion 310, and is not described in detail herein.

Referring to fig. 4, in some embodiments, an end surface of the gimbal assembly 2 facing the shaft 1 and an outer circumferential surface of the gimbal assembly 2 are transited by a fillet 202. The fillet 202 of this embodiment can avoid the bowl mouth fish tail sheath 3 of outer ball cage 207 during the assembly, can effectively cushion the impact of colliding with of foreign matter to sheath 3 simultaneously to prevent that sheath 3 is impaired.

Referring to fig. 4 and 9, in some embodiments, the gimbal assembly 2 further includes a limiting boss 209 disposed on the outer periphery thereof for limiting the contact of the second end 302, and a sidewall of the limiting boss 209 may be an inclined surface, so that the guiding function is provided during installation, and the auxiliary sheath 3 is positioned quickly.

Referring to fig. 1 to 6, 9 and 10, in some embodiments, the fixing section includes a holder 203, steel balls 204, a shaft rod snap spring 205, an inner star wheel 206 and an outer ball cage 207, the inner star wheel 206 is fixed on the shaft rod 1 through the shaft rod snap spring 206, the outer ball cage 207 is sleeved outside the inner star wheel 206, the holder 203 has a plurality of windows 208 distributed annularly, the steel balls 204 are disposed in the windows 208 and correspond to the windows 208 one to one, an inner side of the steel balls 204 is snapped into a groove of the inner star wheel 206, an outer side is snapped into a slideway of the outer ball cage 207, the steel balls 204 can slide in a slideway structure formed between the inner star wheel 206 and the outer ball cage 207, the holder 203 is used for maintaining a posture of the steel balls 204, and further, when the outer ball cage 207 is stationary, the shaft rod 1 can deflect a certain angle to meet requirements of steering and movement.

On the basis of the above embodiment, the distance between the wave crest 304 and the outer ball cage 207 can be designed to be more than 3mm, which is beneficial to effectively buffering the collision and impact of foreign matters on the sheath 3, thereby preventing the sheath 3 from being damaged and leaking oil.

It should be noted that the structure of the movable joint may be substantially the same as or different from that of the fixed joint, and the movable joint is set according to the actual use situation.

Based on the same inventive concept, the embodiment of the application also provides a vehicle comprising the drive shaft assembly.

The beneficial effect of the vehicle that this practicality provided is the same with the beneficial effect of above-mentioned drive shaft assembly, no longer gives unnecessary details here.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A drive shaft assembly, comprising:

a shaft lever;

the two universal joint components are respectively arranged at two ends of the shaft lever;

the sheath is sleeved at the joint of the universal joint component and the shaft rod, the sheath is provided with a first end part connected with the shaft rod and a second end part connected with the universal joint component, the main body of at least one of the sheaths is provided with a wave trough and a wave peak which are sequentially and continuously arranged from inside to outside along the radial direction of the sheath, the wave trough is sunken towards the second end part along the axial direction of the sheath, and the wave peak is raised towards the first end part along the axial direction of the sheath;

the first fixing piece is arranged at the first end part and used for enabling the first end part to be tightly attached to the shaft rod, a first protrusion is arranged on the inner surface of the first end part of at least one sheath, a first groove corresponding to the first protrusion is formed in the shaft rod, and the first protrusion is matched with the first groove so as to limit the relative position of the first end part and the shaft rod in the axial direction of the shaft rod; and

and the second fixing piece is arranged at the second end part and used for enabling the second end part to be tightly attached to the universal joint component.

2. The driveshaft assembly of claim 1, wherein a bottom of the first recess is provided with a second protrusion for sealing abutment with an inner annular surface of the first protrusion.

3. The drive shaft assembly of claim 1, wherein said inner edges of said valleys form straight extensions extending to said first end, said straight extensions being spaced from said shaft.

4. The driveshaft assembly of claim 3, wherein a first transition portion is further disposed between the straight extending portion and the first end portion, an inner surface of the first transition portion is a rounded and curved surface protruding inward, and an inner diameter of the first transition portion gradually increases along a predetermined direction from the first end portion to the second end portion.

5. The driveshaft assembly of claim 4, wherein the shaft has a constricted section corresponding to the straight extending section, the constricted section is transited to the main body of the shaft through a second transition section corresponding to the first transition section, an outer surface of the second transition section is a rounded curved surface protruding outward, and an outer diameter of the second transition section is gradually decreased along the predetermined direction.

6. The driveshaft assembly of claim 1, wherein the second end portion defines a plurality of second grooves spaced apart along an axial direction of the boot, and the gimbal assembly defines a plurality of third protrusions on an outer periphery thereof corresponding to the second grooves, the third protrusions cooperating with the second grooves to define a relative position of the second end portion and the gimbal assembly in the axial direction of the gimbal assembly.

7. The drive shaft assembly as recited in claim 1, wherein a fourth protrusion is provided on an outer peripheral surface of said second end portion, and said second fixing member is in abutting contact with an outer side surface of said fourth protrusion.

8. The drive shaft assembly as in claim 1, wherein the first end portion has two sets of first limiting protrusions spaced along the axial direction of the sheath on the outer peripheral surface thereof for limiting the first fixing member in the axial direction of the sheath; the outer peripheral surface of the second end portion is provided with two groups of second limiting bulges which are distributed at intervals along the axial direction of the sheath, so that the second fixing piece is limited in the axial direction of the sheath.

9. The drive shaft assembly of claim 1, wherein an end surface of the universal joint component facing the shaft and an outer peripheral surface of the universal joint component are rounded.

10. A vehicle comprising a drive axle assembly according to any one of claims 1 to 9.

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