Automobile driving shaft locking structure

Abstract

The invention relates to the technical field of automobile driving shafts, and discloses an automobile driving shaft locking structure which comprises a hub unit and a nut which are connected to the end of a driving shaft in a sleeving mode, the nut abuts against the outer side of the hub unit, and the driving shaft comprises a driving shaft body and a shaft head detachably connected to the end of the driving shaft body. At least three slideways which are circumferentially distributed are arranged at the joint of the shaft head and the driving shaft main body, a lock pin assembly is connected in each slideway in a sliding manner, each lock pin assembly comprises a sliding seat, and the sliding seat is connected with a lock pin head through a spring; an inner chute is formed in the middle of the inner side of the nut; a chamfer is arranged on the inner side of one end, close to the hub unit, of the nut; when the nut is installed on the driving shaft, the chamfers press the lock pin heads into the slideways, and when the inner chutes are aligned with the slideways, the lock pin heads pop out to be clamped in the inner chutes under the action of the springs, so that the nut is fixed, the lock pin heads are wrapped by the nut, and the lock pins are prevented from loosening and falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive drive shafts, and specifically 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] For the traditional locking structure at the connection between the automotive drive shaft and the hub assembly, a relatively basic form of bolt and nut fastening is mostly adopted. 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 increasingly 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 jitter and noise during vehicle driving, and also accelerating the wear of parts, greatly reducing the service life. In severe cases, it may even cause the drive shaft to fall off, 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 In view of the deficiencies in the prior art, the present invention provides a vehicle drive shaft locking structure, which has the advantages of a locking pin that is not easy to fall off, multiple locking pins that circumferentially fix the nuts, and easy installation, thereby solving the problems in the above-mentioned background technology.

[0008] (II) Technical solution To achieve the above object, the present invention provides the following technical solutions: A locking structure for a vehicle drive shaft, comprising a hub unit and a nut sleeved on the end of the drive shaft, the nut being pressed against the outside of the hub unit, the drive shaft comprising a drive shaft body and a shaft head detachably connected to the end of the drive shaft body, at least three slideways distributed circumferentially arranged at the connection between the shaft head and the drive shaft body, a locking pin assembly being slidably connected in each slideway, each locking pin assembly comprising a sliding seat, and the sliding seat being connected to a locking pin head via a spring; An inner bevel groove is provided at the middle position of the inner side of 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 slideway. When the inner bevel groove is aligned with the slideway, the locking pin head pops out and gets stuck in the inner bevel groove under the action of the spring, thereby fixing the nut. The nut wraps the locking pin head to prevent the locking pin from loosening and falling.

[0009] Preferably, the shaft head is further provided with a turntable groove at the connection with the driving shaft body, a turntable is provided in the turntable groove, an oblique long groove corresponding to the lock pin assembly is provided on the circumference of the turntable, and each sliding seat is provided with a card block, and the card block slides in the oblique long groove. When the turntable rotates, the oblique long groove pushes each card block to slide synchronously outward or inward, thereby controlling each sliding seat to slide synchronously inward or outward, thereby controlling the outward elastic force of each lock pin head; A vertical side is arranged on the side of the inner inclined groove close to the wheel hub unit, and an inclined bottom is arranged on the inner bottom surface of the inner inclined groove. The depth of the inclined bottom is shallow on the side close to the wheel hub unit and deep on the side away from the wheel hub unit. When the outward elastic force of the locking pin head increases, the locking pin head presses the nut toward the side close to the wheel hub unit on the inclined bottom, thereby controlling the pressing force of the nut on the wheel hub unit by rotating the turntable.

[0010] Preferably, the locking pin head comprises a mounting seat and a locking pin sleeve, the mounting seat is fixedly connected to one end of the spring, and the locking pin sleeve is detachably connected to the mounting seat, and the detachable locking pin sleeve is easy to replace after being damaged.

[0011] Preferably, the locking pin sleeve is fixed on the mounting seat by means of a magnetic connection or a threaded connection.

[0012] Preferably, one end of each oblique long groove is located close to the center of the turntable, and the other end is located away from the center of the turntable, and the channel between the two ends of the oblique long groove is smoothly connected.

[0013] 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, and 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; 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.

[0014] Preferably, a washer is provided on the outer side of one end of the nut close to the hub unit.

[0015] Preferably, a spline is provided on the main body of the drive shaft, and a spline sleeve is provided in the hub unit. The spline sleeve is slidably connected to the spline.

[0016] 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.

[0017] Preferably, the shaft head is fixed to the main body of the drive shaft by a plurality of bolts arranged circumferentially.

[0018] (III) Beneficial effects Compared with the prior art, the present invention provides an automotive drive shaft locking structure, which has the following beneficial effects: 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 slideways are provided between the main body of the drive shaft and the shaft head. A locking pin assembly is arranged in the slideways. 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 locking pin head of the locking pin assembly is pushed into the slideway by the chamfer. When the inner inclined groove is aligned with the slideway, 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 operating steps, improving the installation efficiency. When disassembling, the locking can be released by disassembling the shaft head, and the operation is simple and convenient.

[0019] 2. For this 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 hex key 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 elastic force of each locking pin head outward. 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 squeezes the hub unit inward. Under the action of the turntable, not only can the magnitude of the force with which the nut squeezes inward be adjusted, but also the locking pin heads can be hidden in the sliding channels by rotating the turntable, which facilitates passing the hub unit through the shaft head part and also facilitates removing the nut from the drive shaft.

[0020] 3. For this 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

[0021] Figure 1 It is a schematic diagram of the overall structure of the locking structure of the vehicle drive shaft according to the present invention.

[0022] Figure 2 It is an exploded view of the locking structure of the vehicle drive shaft according to the present invention.

[0023] Figure 3 It is a semi-sectional isometric schematic diagram of the nut according to the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the hub unit according to the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of the drive shaft according to the present invention.

[0026] Figure 6 It is an exploded view of the drive shaft according to the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the end cover according to the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of the shaft head according to the present invention.

[0029] Figure 9 It is a schematic diagram of the structure of the turntable according to the present invention.

[0030] Figure 10This is a schematic structural view of the locking pin assembly of the present invention.

[0031] Figure 11 This is a schematic structural view of the main body of the drive shaft of the present invention.

[0032] Figure 12 This is a sectional view of the locking structure of the present invention.

[0033] Figure 13 For the present invention Figure 12 An enlarged view of area A during locking in the present invention.

[0034] Figure 14 For the present invention Figure 12 An enlarged view of area A during unlocking in the present invention.

[0035] In the figure: 1. Drive shaft; 2. Hub unit; 3. Nut; 11. Main body of 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 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 inclined groove; 321. Vertical edge; 322. Oblique bottom; 33. Chamfer. Detailed implementation manners

[0036] 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.

[0037] 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 thus should not be construed as a limitation of the present invention.

[0038] 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.

[0039] Embodiment 1: This embodiment provides an automotive drive shaft locking structure with the following technical features.

[0040] Please refer to Figures 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 outside 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 sliding grooves 101 distributed circumferentially are provided at the connection between the shaft head 12 and the drive shaft main body 11. A locking pin assembly 14 is slidably connected in each sliding groove 101. 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; 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 sliding groove 101. When the inner inclined groove 32 is aligned with the sliding groove 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.

[0041] In an alternative 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 clamped 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, thereby controlling the magnitude of the outward elastic force of each locking pin head; 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 outward elastic force of the locking pin head increases, the locking pin head abuts against the inclined bottom 322 and squeezes 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.

[0042] In an alternative embodiment, the locking pin head includes a mounting base 144 and a locking pin sleeve 145. The mounting base 144 is fixedly connected to one end of the spring 143, and the locking pin sleeve 145 is detachably connected to the mounting base 144. The detachable locking pin sleeve 145 facilitates replacement in case of damage.

[0043] In an alternative embodiment, the locking pin sleeve 145 is fixed to the mounting base 144 by magnetic attraction connection or threaded connection.

[0044] 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.

[0045] In an alternative embodiment, one end of each inclined long groove 131 is located near the center of the turntable 13, and the other end is located away from the center of the turntable 13. The channels between the two ends of the inclined long groove 131 are smoothly connected.

[0046] It should be noted that the inclined long groove 131 can be a straight groove or an arc groove, as Figure 9 shown as a straight groove.

[0047] 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; A locking hole 151 is provided at the end of the rotating rod 15 located outside the shaft head 12. A detachable end cap 16 is also covered on the outer end of the shaft head 12. The end cap 16 presses on the end of the rotating rod 15. A fixed locking block 161 is provided at the position of the end cap 16 corresponding to the locking hole 151. The fixed locking block 161 is stuck in the locking hole 151 to prevent the rotating rod 15 from rotating.

[0048] 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.

[0049] It should be noted that the washer 31 is made of a soft material, such as rubber.

[0050] In an alternative embodiment, a spline 111 is provided on the driving shaft main 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.

[0051] It should be noted that the function of the spline connection is to enable the driving shaft main body 11 and the hub unit 2 to slide relative to each other but not rotate relative to each other.

[0052] In an alternative embodiment, an inner ring 112 is further provided on the driving shaft main body 11. One end of the hub unit 2 abuts against the nut 3, and the other end abuts against the inner ring 112.

[0053] It should be noted that the inner ring 112 can be directly fixed to the inner side of the hub unit 2 through a stepped portion protruding outward.

[0054] In an alternative embodiment, the shaft head 12 is fixed to the drive shaft main body 11 by a plurality of bolts arranged circumferentially.

[0055] 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.

[0056] In summary, for the locking structure of the automotive drive shaft, the drive shaft 1 is divided into a drive shaft main body 11 and a shaft head 12. At least three slideways 101 distributed circumferentially are provided between the drive shaft main body 11 and the shaft head 12. A locking pin assembly 14 is arranged in the slideway 101. An inner inclined groove 32 is provided inside the nut 3, and a chamfer 33 is provided at the end. When installing the nut 3, the chamfer 33 presses the locking pin head of the locking pin assembly 14 into the slideway 101. When the inner inclined groove 32 aligns 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 erosion. 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 socket 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.

[0057] For the locking structure of the automotive 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 arranged circumferentially on the turntable 13. The clamping block 142 slides in the oblique long grooves 131. 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 hexagonal 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 outward or inward, thereby changing the outward elastic force of each locking pin head. At the same time, the bottom surface of the inner inclined groove 32 is set as an inclined bottom 322, so that the change in the elastic force can affect the magnitude of the force with which the nut 3 presses inward on the hub unit 2. Under the action of the turntable 13, not only can the magnitude of the force with which the nut 3 presses inward be adjusted, but also the locking pin head can be hidden in the slideway 101 by rotating the turntable 13, 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.

[0058] For the locking structure of the vehicle drive shaft, the locking pin head is divided into two parts, namely a mounting seat 144 and a locking pin sleeve 145. The locking pin sleeve 145 is fixedly connected to the end of a spring 143, and the locking pin sleeve 145 is detachably connected to the mounting seat 144. The locking pin sleeve 145 is fixed to the mounting 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. At the same time, different lengths of locking pin sleeves 145 can be replaced according to different sizes of hub units 2. The locking pin sleeves 145 with different lengths can squeeze the nut 3 inward by different distances, so that the nut 3 fits the hub unit 2 more closely.

[0059] 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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 "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0060] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle drive shaft locking structure, comprising a hub unit (2) sleeved on the end of a drive shaft (1) and a nut (3), wherein the nut (3) is pressed against the outside of the hub unit (2), and characterized in that: The drive shaft (1) comprises a drive shaft body (11) and a shaft head (12) detachably connected to the end of the drive shaft body (11); at least three circumferentially distributed slideways (101) are provided at the connection between the shaft head (12) and the drive shaft body (11); a locking pin assembly (14) is slidably connected in each slideway (101); Each locking pin assembly (14) comprises a sliding seat (141), and the sliding seat (141) is connected to a locking pin head via a spring (143); An inner bevel groove (32) is provided at a middle position inside the nut (3), and a chamfer (33) is provided inside one end of the nut (3) close to the hub unit (2); When the nut (3) is mounted 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 and is stuck in the inner inclined groove (32) under the action of the spring (143), thereby fixing the nut (3). The nut (3) wraps the locking pin head to prevent the locking pin from loosening and falling.

2. The automobile drive shaft locking structure according to claim 1, characterized in that: The shaft head (12) is further provided with a rotating disc groove (121) at the connection with the driving shaft body (11), a rotating disc (13) is provided in the rotating disc groove (121), an oblique long groove (131) corresponding to the locking pin assembly (14) is provided on the circumference of the rotating disc (13), and each sliding seat (141) is provided with a clamping block (142), and the clamping block (142) is clamped in the oblique long groove (131) and slides; When the rotating disk (13) rotates, the oblique long grooves (131) push the blocks (142) to slide synchronously outward or inward, thereby controlling the sliding seats (141) to slide synchronously inward or outward, thereby controlling the outward elastic force of the locking pin heads; A vertical side (321) is provided on a side of the inner inclined groove (32) close to the wheel hub unit (2), and an inclined bottom (322) is provided on the inner bottom surface of the inner inclined groove (32). The inclined bottom (322) is shallow on the side close to the wheel hub unit (2) and deep on the side away from the wheel hub unit (2). When the outward elastic force of the locking pin head increases, the locking pin head presses the nut (3) on the inclined bottom (322) to the side close to the wheel hub unit (2), thereby controlling the pressing force of the nut (3) on the wheel hub unit (2) by rotating the rotating disk (13).

3. The automobile drive shaft locking structure according to claim 2, characterized in that: The locking pin head comprises a mounting seat (144) and a locking pin sleeve (145); the mounting seat (144) is fixedly connected to one end of a spring (143); the locking pin sleeve (145) is detachably connected to the mounting seat (144); the detachable locking pin sleeve (145) is convenient for replacement after being damaged.

4. The automobile drive shaft locking structure according to claim 3, characterized in that: The locking pin sleeve (145) is fixed on the mounting seat (144) by means of a magnetic connection or a threaded connection.

5. The automobile drive shaft locking structure according to claim 2, characterized in that: One end of each oblique long groove (131) is located close to the center of the rotating disk (13), and the other end is located away from the center of the rotating disk (13), and the channel between the two ends of the oblique long groove (131) is smoothly connected.

6. The automobile drive shaft locking structure according to claim 2, characterized in that: One end of a rotating rod (15) is fixedly connected to a side of the rotating disk (13) away from the driving shaft body (11); the other end of the rotating rod (15) passes through a rotating rod through hole (122) on the shaft head (12) to reach the outer end of the shaft head (12); The end of the rotating rod (15) located outside the shaft head (12) is provided with a locking hole (151); the end outside the shaft head (12) is also covered with a detachable end cover (16); the end cover (16) is pressed onto the end of the rotating rod (15); a fixed locking block (161) is provided at a position of the end cover (16) corresponding to the locking hole (151); the fixed locking block (161) is stuck in the locking hole (151) to prevent the rotating rod (15) from rotating.

7. The automobile drive shaft locking structure according to claim 2, characterized in that: A washer (31) is provided on the outer side of one end of the nut (3) close to the hub unit (2).

8. The automobile drive shaft locking structure according to claim 1, characterized in that: The drive shaft body (11) is provided with a spline (111), and the hub unit (2) is provided with a spline sleeve (21), wherein the spline sleeve (21) is slidably connected to the spline (111).

9. The automobile drive shaft locking structure according to claim 8, characterized in that: An inner ring (112) is also provided on the driving shaft body (11), and one end of the hub unit (2) is pressed against the nut (3) and the other end is pressed against the inner ring (112).

10. The automobile drive shaft locking structure according to claim 1, characterized in that: The shaft head (12) is fixed to the driving shaft body (11) by means of a plurality of bolts arranged around the circumference.

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