An automotive drive shaft locking structure

Abstract

The present invention relates to the technical field of automotive drive shafts, and discloses an automotive drive shaft locking structure, which includes a hub unit and a nut sleeved on the end of the drive shaft. The nut abuts against the outside of the hub unit. The drive shaft includes a drive shaft main body and a shaft head detachably connected to the end of the drive shaft main body. At least three sliding grooves distributed circumferentially are provided at the connection between the shaft head and the drive shaft main body. Each sliding groove is slidably connected with a locking pin assembly. Each locking pin assembly includes a sliding seat, and the sliding seat is connected with a locking pin head through a spring; an inner inclined groove is provided at the middle position inside the nut, and a chamfer is provided at the inner side of one end of the nut close to the hub unit; when the nut is installed on the drive shaft, the chamfer presses each locking pin head into the sliding groove, and when the inner inclined groove is aligned with the sliding groove, the locking pin head pops out under the action of the spring and is stuck in the inner inclined groove, thereby fixing the nut. The nut wraps the locking pin head to prevent the locking pin from loosening and falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive drive shafts, and particularly to a locking structure for an automotive drive shaft. Background Art

[0002] At present, with the booming development of the automotive industry, the safety, reliability and driving performance of automobiles have always been the core concerns in the R & D and manufacturing processes. As a key link in the power transmission chain, the firm connection degree between the automotive drive shaft and the hub assembly directly affects the overall performance of the vehicle.

[0003] The traditional locking structure at the connection between the automotive drive shaft and the hub assembly mostly adopts a relatively basic form of bolt and nut fastening. Although this kind of design has a simple structure and low cost and was widely used in the early automotive manufacturing field, with the iterative upgrade of automotive technology, its disadvantages have become more and more obvious. On the one hand, during daily driving, the vehicle frequently undergoes complex working conditions such as acceleration, deceleration, turning, and bumping, and the drive shaft and the hub continuously bear multi-dimensional dynamic forces. The ordinary bolt and nut combination is extremely easy to loosen due to vibration and impact. Once loosened, the connection accuracy between the drive shaft and the hub is damaged, resulting in unstable power transmission, abnormal vibration and noise during vehicle driving, and also aggravating the wear of parts, greatly reducing the service life, and even possibly causing the drive shaft to fall off in severe cases, directly threatening the lives of the driver and passengers.

[0004] The patent with the publication number CN2842044Y discloses a locking structure for an automotive drive shaft, including a drive shaft, a nut and a locking pin. Among them, the nut is a slotted nut, and during assembly, the locking pin passes through the drive shaft across the slot. In the above patent, the locking pin is easy to fall off, and only the two ends of the locking pin have a fixing effect on the nut, and the support for the nut is not stable and uniform enough.

[0005] The patent document with the publication number CN202896189U discloses a locking structure for an anti-loosening drive shaft, including a hub unit and a drive shaft assembled in the shaft hole of the hub unit. The hub unit and the drive shaft are fixed by a self-locking nut, and a nylon pad is provided on the inner wall of the nut. The presence of the split pin effectively prevents the drive shaft from falling off due to the failure and falling off of the nut under special circumstances. In the above patent, the split pin is easy to fall off, and only the two ends of the split pin have a fixing effect on the nut, and the support for the nut is not stable and uniform enough.

[0006] To sum up, the following defects still exist in the prior art: 1. The locking pin is easy to fall off; 2. Only the two ends of the locking pin fix the nut, and it is easy to be unevenly stressed. Summary of the Invention

[0007] (I) Technical Problems to be Solved

[0008] In view of the deficiencies of the prior art, the present invention provides a locking structure for an automotive drive shaft, which has the advantages of difficult pin detachment, circumferential fixing nuts for multiple pins, and convenient installation, and solves the problems in the above-mentioned background art.

[0009] (II) Technical Solution

[0010] To achieve the above object, the present invention provides the following technical solution:

[0011] A locking structure for an automotive drive shaft includes a hub unit and a nut sleeved on the end of the drive shaft. The nut abuts against the outside of the hub unit. The drive shaft includes a drive shaft main body and a shaft head detachably connected to the end of the drive shaft main body. At least three sliding grooves are circumferentially distributed at the connection between the shaft head and the drive shaft main body. A pin assembly is slidably connected in each sliding groove. Each pin assembly includes a sliding seat, and the sliding seat is connected to a pin head by a spring;

[0012] An inner inclined groove is provided at the middle position inside the nut, and a chamfer is provided at the inner side of the end of the nut close to the hub unit;

[0013] When the nut is installed on the drive shaft, the chamfer presses each pin head into the sliding groove. When the inner inclined groove aligns with the sliding groove, the pin head pops out under the action of the spring and gets stuck in the inner inclined groove, thereby fixing the nut. The nut wraps the pin head to prevent the pin from loosening and falling.

[0014] Preferably, a turntable groove is further provided at the connection between the shaft head and the drive shaft main body. A turntable is provided in the turntable groove. Oblique long grooves corresponding to the pin assemblies one by one are circumferentially provided on the turntable. A block is provided on each sliding seat, and the block is stuck in the oblique long groove and slides. When the turntable rotates, each block is pushed to slide synchronously outward or inward through the oblique long groove, thereby controlling the sliding seats to slide synchronously inward or outward, and thus controlling the outward elastic force of each pin head;

[0015] A vertical side is provided on the side of the inner inclined groove close to the hub unit, and an inclined bottom is provided on the bottom surface of the inner inclined groove. The inclined bottom is shallow on the side close to the hub unit and deep on the side far from the hub unit. When the outward elastic force of the pin head increases, the pin head abuts against the inclined bottom and squeezes the nut toward the side close to the hub unit, thereby controlling the squeezing force of the nut on the hub unit by rotating the turntable.

[0016] [[ID= (24)]]Preferably, the pin head includes a mounting seat and a pin sleeve. The mounting seat is fixedly connected to one end of the spring, and the pin sleeve is detachably connected to the mounting seat. The detachable pin sleeve is convenient for replacement when damaged.

[0017] Preferably, the pin sleeve is fixed to the mounting seat by magnetic attraction connection or threaded connection.

[0018] Preferably, one end of each inclined long groove is located near the center of the turntable, and the other end is located far from the center of the turntable. The channels between the two ends of the inclined long groove are smoothly connected.

[0019] Preferably, one end of a rotating rod is fixedly connected to the side of the turntable away from the main body of the drive shaft. The other end of the rotating rod passes through the rotating rod through hole on the shaft head to reach the outer end of the shaft head.

[0020] A locking hole is provided at the end of the rotating rod located outside the shaft head. The outer end of the shaft head is also covered with a detachable end cap. The end cap presses on the end of the rotating rod. A fixed locking block is provided at the position of the end cap corresponding to the locking hole. The fixed locking block is stuck in the locking hole to prevent the rotating rod from rotating.

[0021] Preferably, a washer is provided on the outer side of the end of the nut close to the hub unit.

[0022] Preferably, a spline is provided on the main body of the drive shaft, and a spline sleeve is provided inside the hub unit. The spline sleeve is slidably connected to the spline.

[0023] Preferably, an inner ring is further provided on the main body of the drive shaft. One end of the hub unit abuts against the nut, and the other end abuts against the inner ring.

[0024] Preferably, the shaft head is fixed to the main body of the drive shaft by a plurality of bolts arranged circumferentially.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides an automotive drive shaft locking structure, which has the following beneficial effects:

[0027] 1. In this automotive drive shaft locking structure, the drive shaft is divided into a main body of the drive shaft and a shaft head. At least three circumferentially distributed sliding grooves are provided between the main body of the drive shaft and the shaft head. A locking pin assembly is provided in the sliding grooves. An inner inclined groove is provided on the inner side of the nut, and a chamfer is provided at the end. When installing the nut, the chamfer presses the locking pin head of the locking pin assembly into the sliding groove. When the inner inclined groove aligns with the sliding groove, the locking pin head pops out and is stuck in the inner inclined groove, thereby locking the nut. The locking pin head is hidden in the inner inclined groove, which can effectively prevent the locking pin from loosening or falling due to various reasons. At the same time, it can also prevent the locking pin head from being exposed to erosion. In addition, more than three locking pin heads can be provided to fix and squeeze the nut more evenly and comprehensively, improving the stability of the locking structure. When installing the nut, only need to directly sleeve the nut on the end of the drive shaft, without the need to tighten bolts or other operation steps, improving the installation efficiency. When disassembling, the locking can be released by disassembling the shaft head, and the operation is simple and convenient.

[0028] 2. For the locking structure of the vehicle drive shaft, a turntable is provided at the connection between the drive shaft main body and the shaft head. Oblique long slots are circumferentially arranged on the turntable, and the clamping blocks slide within the oblique long slots. The turntable is fixedly connected to a rotating rod, and the rotating rod passes through the shaft head. By inserting a corresponding hexagonal wrench into the end of the rotating rod and rotating it, the turntable is driven to rotate. When the turntable rotates, under the action of the oblique long slots, the clamping blocks are synchronously pushed outward or inward, thereby changing the outward elastic force of each locking pin head. At the same time, the bottom surface of the inner oblique slot is set as an inclined bottom, so that the change in the elastic force can affect the magnitude of the force with which the nut presses inward on the hub unit. Under the action of the turntable, not only can the magnitude of the force with which the nut presses inward be adjusted, but also the locking pin heads can be hidden within the sliding grooves by rotating the turntable, thus facilitating the passing of the hub unit through the shaft head part and also facilitating the removal of the nut from the drive shaft.

[0029] 3. For the locking structure of the vehicle drive shaft, the locking pin head is divided into two parts: a mounting seat and a locking pin sleeve. The locking pin sleeve is fixedly connected to the end of the spring, and the locking pin sleeve is detachably connected to the mounting seat. The locking pin sleeve is fixed to the mounting seat by means of threaded connection or magnetic attraction connection. After the locking pin sleeve is worn, it can be directly and quickly replaced without removing the shaft head for replacement. At the same time, different lengths of locking pin sleeves can be replaced according to different sizes of hub units, and different lengths of locking pin sleeves can push the nut inward by different distances, so that the nut fits the hub unit more closely. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the locking structure of the vehicle drive shaft of the present invention.

[0031] Figure 2 It is an exploded view of the locking structure of the vehicle drive shaft of the present invention.

[0032] Figure 3 It is a semi-sectional isometric schematic diagram of the nut of the present invention.

[0033] Figure 4 It is a schematic diagram of the structure of the hub unit of the present invention.

[0034] Figure 5 It is a schematic diagram of the structure of the drive shaft of the present invention.

[0035] Figure 6 It is an exploded view of the drive shaft of the present invention.

[0036] Figure 7 It is a schematic diagram of the structure of the end cover of the present invention.

[0037] Figure 8 It is a schematic diagram of the structure of the shaft head of the present invention.

[0038] Figure 9 It is a schematic diagram of the structure of the turntable of the present invention.

[0039] Figure 10This is a schematic structural diagram of the locking pin assembly of the present invention.

[0040] Figure 11 This is a schematic structural diagram of the main body of the drive shaft of the present invention.

[0041] Figure 12 This is a sectional view of the locking structure of the present invention.

[0042] Figure 13 For the present invention Figure 12 An enlarged view of area A during locking in the present invention.

[0043] Figure 14 For the present invention Figure 12 An enlarged view of area A during unlocking in the present invention.

[0044] In the figure: 1. Drive shaft; 2. Hub unit; 3. Nut; 11. Main body of the drive shaft; 12. Shaft head; 13. Turntable; 14. Locking pin assembly; 15. Rotating rod; 16. End cover; 101. Slideway; 111. Spline; 112. Inner ring; 121. Turntable groove; 122. Through hole of the rotating rod; 131. Oblique long groove; 151. Lock hole; 141. Sliding seat; 142. Block; 143. Spring; 144. Mounting seat; 145. Locking pin sleeve; 161. Fixed lock block; 21. Spline sleeve; 31. Washer; 32. Inner oblique groove; 321. Vertical edge; 322. Oblique bottom; 33. Chamfer. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention.

[0047] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0048] Embodiment 1:

[0049] This embodiment provides an automotive drive shaft locking structure with the following technical features.

[0050] Please refer to Figure 1-14 , an automotive drive shaft locking structure, including a hub unit 2 and a nut 3 sleeved on the end of the drive shaft 1. The nut 3 abuts against the outer side of the hub unit 2. The drive shaft 1 includes a drive shaft main body 11 and a shaft head 12 detachably connected to the end of the drive shaft main body 11. At least three slideways 101 distributed circumferentially are provided at the connection between the shaft head 12 and the drive shaft main body 11. Each slideway 101 is slidably connected with a locking pin assembly 14. Each locking pin assembly 14 includes a sliding seat 141, and the sliding seat 141 is connected with a locking pin head through a spring 143;

[0051] An inner inclined groove 32 is provided at the middle position inside the nut 3, and a chamfer 33 is provided at the inner side of one end of the nut 3 close to the hub unit 2;

[0052] When the nut 3 is installed on the drive shaft 1, the chamfer 33 presses each locking pin head into the slideway 101. When the inner inclined groove 32 is aligned with the slideway 101, the locking pin head pops out under the action of the spring 143 and gets stuck in the inner inclined groove 32, thereby fixing the nut 3. The nut 3 wraps the locking pin head to prevent the locking pin from loosening and falling off.

[0053] In an optional embodiment, a turntable groove 121 is further provided at the connection between the shaft head 12 and the drive shaft main body 11. A turntable 13 is provided in the turntable groove 121. Oblique long grooves 131 corresponding to the locking pin assemblies 14 one by one are circumferentially provided on the turntable 13. A clamping block 142 is provided on each sliding seat 141, and the clamping block 142 is stuck in the oblique long groove 131 and slides therein. When the turntable 13 rotates, each clamping block 142 is pushed to slide synchronously outward or inward through the oblique long groove 131, so as to control the synchronous inward or outward sliding of each sliding seat 141, and thus control the elastic force magnitude of each locking pin head outward;

[0054] On one side of the inner inclined groove 32 close to the hub unit 2, there is a vertical vertical edge 321. On the inner bottom surface of the inner inclined groove 32, there is an inclined bottom 322. The inclined bottom 322 is shallow on the side close to the hub unit 2 and deep on the side far from the hub unit 2. When the outward elastic force of the locking pin head increases, the locking pin head presses against the inclined bottom 322 to squeeze the nut 3 towards the side close to the hub unit 2, thereby controlling the squeezing force of the nut 3 on the hub unit 2 by rotating the turntable 13.

[0055] In an alternative embodiment, the locking pin head includes a mounting seat 144 and a locking pin sleeve 145. The mounting seat 144 is fixedly connected to one end of the spring 143, and the locking pin sleeve 145 is detachably connected to the mounting seat 144. The detachable locking pin sleeve 145 is convenient for replacement when damaged.

[0056] In an alternative embodiment, the locking pin sleeve 145 is fixed to the mounting seat 144 by magnetic attraction connection or threaded connection.

[0057] It should be noted that when the locking pin sleeve 145 pops out to the highest height, there is still a part of the locking pin sleeve 145 located within the slideway 101.

[0058] In an alternative embodiment, one end of each inclined long groove 131 is located at a position close to the center of the turntable 13, and the other end is located at a position far from the center of the turntable 13. The channels between the two ends of the inclined long groove 131 are smoothly connected.

[0059] It should be noted that the inclined long groove 131 can be a straight groove or an arc groove. As Figure 9 shown is a straight groove.

[0060] In an alternative embodiment, one end of a rotating rod 15 is fixedly connected to the side of the turntable 13 away from the driving shaft main body 11. The other end of the rotating rod 15 passes through the rotating rod through hole 122 on the shaft head 12 to reach the outer end of the shaft head 12;

[0061] At the end of the rotating rod 15 located outside the shaft head 12, there is a locking hole 151. The outer end of the shaft head 12 is also covered with a detachable end cap 16. The end cap 16 presses on the end of the rotating rod 15. At the position corresponding to the locking hole 151 on the end cap 16, there is a fixed locking block 161, and the fixed locking block 161 is stuck in the locking hole 151 to prevent the rotating rod 15 from rotating.

[0062] In an alternative embodiment, a washer 31 is provided on the outer side of one end of the nut 3 close to the hub unit 2.

[0063] It should be noted that the washer 31 is made of a soft material, such as rubber.

[0064] In an alternative embodiment, a spline 111 is provided on the drive shaft body 11, and a spline sleeve 21 is provided inside the hub unit 2. The spline sleeve 21 is slidably connected to the spline 111.

[0065] It should be noted that the function of the spline connection is to enable the drive shaft body 11 and the hub unit 2 to slide relative to each other but not rotate relative to each other.

[0066] In an alternative embodiment, an inner ring 112 is further provided on the drive shaft body 11. One end of the hub unit 2 abuts against the nut 3 and the other end abuts against the inner ring 112.

[0067] It should be noted that the inner ring 112 can directly fix the inner side of the hub unit 2 through an outwardly protruding step.

[0068] In an alternative embodiment, the shaft head 12 is fixed to the drive shaft body 11 by a plurality of bolts arranged circumferentially.

[0069] It should be noted that the positions where the bolts are installed on the shaft head 12 need to avoid the positions of the turntable 13 and the slideway 101.

[0070] In summary, for this automotive drive shaft locking structure, the drive shaft 1 is divided into a drive shaft body 11 and a shaft head 12. At least three slideways 101 distributed circumferentially are provided between the drive shaft body 11 and the shaft head 12. A locking pin assembly 14 is provided in the slideways 101. An inner inclined groove 32 is provided on the inner side of the nut 3 and a chamfer 33 is provided at the end. When installing the nut 3, the chamfer 33 forces the locking pin head of the locking pin assembly 14 into the slideway 101. When the inner inclined groove 32 is aligned with the slideway 101, the locking pin head pops out and gets stuck in the inner inclined groove 32, thereby locking the nut 3. The locking pin head is hidden in the inner inclined groove 32, which can effectively prevent the locking pin from loosening or falling due to various reasons. At the same time, it can also prevent the locking pin head from being exposed to corrosion. Moreover, more than three locking pin heads can be provided to fix and squeeze the nut 3 more evenly and comprehensively, improving the stability of the locking structure. When installing the nut 3, only need to directly sleeve the nut 3 on the end of the drive shaft 1, without the need to tighten bolts or other operating steps, improving the installation efficiency. When disassembling, the locking can be released by disassembling the shaft head 12, and the operation is simple and convenient.

[0071] For the locking structure of the vehicle drive shaft, a turntable 13 is provided at the connection between the drive shaft main body 11 and the shaft head 12. Oblique long grooves 131 are circumferentially provided on the turntable 13. The clamping block 142 is stuck in the oblique long grooves 131 and slides therein. The turntable 13 is fixedly connected to a rotating rod 15. The rotating rod 15 passes through the shaft head 12. By inserting a corresponding hexagon wrench into the end of the rotating rod 15 and rotating it, the turntable 13 is driven to rotate. When the turntable 13 rotates, under the action of the oblique long grooves 131, the clamping block 142 is synchronously pushed outwards or inwards, thereby changing the elastic force of each locking pin head outwards. At the same time, the bottom surface of the inner oblique groove 32 is set as an inclined bottom 322, so that the change in the elastic force can affect the magnitude of the force for the nut 3 to squeeze the hub unit 2 inwards. Under the action of the turntable 13, not only can the magnitude of the force for the nut 3 to squeeze inwards be adjusted, but also the locking pin head can be hidden in the slideway 101 by rotating the turntable 13, thereby facilitating the hub unit 2 to pass through the shaft head 12 part and also facilitating the removal of the nut 3 from the drive shaft 1.

[0072] For the locking structure of the vehicle drive shaft, the locking pin head is divided into two parts, an installation seat 144 and a locking pin sleeve 145. The locking pin sleeve 145 is fixedly connected to the end of the spring 143. The locking pin sleeve 145 is detachably connected to the installation seat 144. The locking pin sleeve 145 is fixed to the installation seat 144 by means of threaded connection or magnetic attraction connection. After the locking pin sleeve 145 is worn, it can be directly and quickly replaced without removing the shaft head 12 for replacement. At the same time, different lengths of locking pin sleeves 145 can be replaced according to different sizes of the hub unit 2. Different lengths of locking pin sleeves 145 can squeeze the nut 3 inwards by different distances, so that the nut 3 fits the hub unit 2 more closely.

[0073] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0074] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automotive drive shaft locking structure, comprising a hub unit (2) and a nut (3) sleeved on the end of a drive shaft (1), the nut (3) abuts against the outside of the hub unit (2), and is characterized in that, The drive shaft (1) includes a drive shaft main body (11) and a shaft head (12) detachably connected to the end of the drive shaft main body (11). At the connection between the shaft head (12) and the drive shaft main body (11), at least three slideways (101) distributed circumferentially are provided, and a locking pin assembly (14) is slidably connected in each slideway (101); Each locking pin assembly (14) includes a sliding seat (141), and a locking pin head is connected to the sliding seat (141) through a spring (143); An inner inclined groove (32) is provided at the middle position inside the nut (3), and a chamfer (33) is provided at the inner side of one end of the nut (3) close to the hub unit (2); When the nut (3) is installed on the drive shaft (1), the chamfer (33) presses each locking pin head into the slideway (101). When the inner inclined groove (32) is aligned with the slideway (101), the locking pin head pops out under the action of the spring (143) and gets stuck in the inner inclined groove (32), thereby fixing the nut (3). The nut (3) wraps the locking pin head to prevent the locking pin from loosening and falling; A turntable groove (121) is further provided at the connection between the shaft head (12) and the drive shaft main body (11). A turntable (13) is provided in the turntable groove (121). Oblique long grooves (131) corresponding to the locking pin assemblies (14) one by one are provided circumferentially on the turntable (13). A block (142) is provided on each sliding seat (141), and the block (142) is stuck in the oblique long groove (131) and slides; When the turntable (13) rotates, each block (142) is pushed to slide synchronously outward or inward through the oblique long groove (131), so as to control each sliding seat (141) to slide synchronously inward or outward, thereby controlling the elastic force magnitude of each locking pin head outward; A vertical vertical edge (321) is provided on the side of the inner inclined groove (32) close to the hub unit (2), and an inclined bottom (322) is provided on the bottom surface of the inner inclined groove (32). The inclined bottom (322) is shallow on the side close to the hub unit (2) and deep on the side far from the hub unit (2). When the elastic force of the locking pin head outward increases, the locking pin head abuts against the inclined bottom (322) and squeezes the nut (3) toward the side close to the hub unit (2), thereby controlling the extrusion force of the nut (3) on the hub unit (2) by rotating the turntable (13).

2. The locking structure of an automotive drive shaft according to claim 1, characterized in that The locking pin head includes a mounting seat (144) and a locking pin sleeve (145). The mounting seat (144) is fixedly connected to one end of the spring (143), and the locking pin sleeve (145) is detachably connected to the mounting seat (144). The detachable locking pin sleeve (145) is convenient for replacement after damage.

3. The locking structure of an automotive drive shaft according to claim 2, characterized in that, The locking pin sleeve (145) is fixed on the mounting seat (144) by magnetic attraction connection or threaded connection.

4. A locking structure for an automotive drive shaft according to claim 1, characterized in that, One end of each oblique long groove (131) is located at a position close to the center of the turntable (13), and the other end is located at a position far from the center of the turntable (13). The channel between the two ends of the oblique long groove (131) is smoothly connected.

5. A locking structure for an automotive drive shaft according to claim 1, wherein, One end of a rotating rod (15) is fixedly connected to a side of the turntable (13) away from the driving shaft body (11), and the other end of the rotating rod (15) passes through a rotating rod through-hole (122) in the shaft head (12) to reach the outer end of the shaft head (12). A locking hole (151) is provided at the end of the rotating rod (15) outside the shaft head (12). A detachable end cap (16) also covers the outer end of the shaft head (12). The end cap (16) presses on the end of the rotating rod (15). A fixing lock block (161) is provided at a position corresponding to the locking hole (151) on the end cap (16), and the fixing lock block (161) is stuck in the locking hole (151) to prevent the rotating rod (15) from rotating.

6. The locking structure of an automotive drive shaft according to claim 1, wherein, A washer (31) is provided on the outer side of one end of the nut (3) close to the hub unit (2).

7. The locking structure of an automotive drive shaft according to claim 1, characterized in that, A spline (111) is provided on the driving shaft body (11), and a spline sleeve (21) is provided inside the hub unit (2). The spline sleeve (21) is slidably connected to the spline (111).

8. A locking structure for an automotive drive shaft according to claim 7, characterized in that, An inner ring (112) is also provided on the driving shaft body (11). One end of the hub unit (2) abuts against the nut (3), and the other end abuts against the inner ring (112).

9. A locking structure for an automotive drive shaft according to claim 1, characterized in that, The shaft head (12) is fixed to the driving shaft body (11) by a plurality of bolts arranged circumferentially.

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