Automobile driving shaft

Abstract

The utility model relates to the technical field of driving shafts, in particular to an automobile driving shaft which comprises a first intermediate shaft with one side provided with an outer ball cage, a second intermediate shaft with one side provided with an inner ball cage and a connecting shaft. The circumferential surface of the first connecting disc is in threaded connection with the second connecting disc through a plurality of second bolts, a positioning device is arranged between the adjacent first connecting disc and second connecting disc, dust covers are arranged on the opposite sides of the outer ball cage and the inner ball cage, and the first half shell and the second half shell are connected through a fixing device. According to the utility model, the first bolt and the second bolt are in threaded connection with the first connecting disc in different directions, so that the first intermediate shaft and the second intermediate shaft are respectively and firmly fixed with the connecting shaft; and through the fixing device, the first clamp and the second clamp are fixed through the third bolt and the nut, the fixing mode is firm, and falling is not prone to occurring.

Description

Technical Field

[0001] This utility model relates to the field of drive shaft technology, and in particular to an automotive drive shaft. Background Technology

[0002] The drive shaft assembly is an important component of a car. One end of the drive shaft is connected to the universal joint at the power output end of the car's transmission, and the other end is connected to the universal joint at the power input end of the car's wheels. The function of the drive shaft is to transmit torque between the car's transmission and the wheels.

[0003] For example, the authorization announcement number "CN212106678U" describes an automotive drive shaft. By setting a connecting shaft and a guide rod, the connecting shaft is moved to one side of the first and second intermediate shafts. The connecting shaft drives the guide rod to move into the guide rod groove, which facilitates the positioning of the connecting shaft during installation and avoids misalignment during docking. Then, the threaded rod is moved into the threaded groove. The length of the automotive drive shaft can be adjusted by installing or removing the connecting shaft. It has wide applicability and is convenient to use.

[0004] The above and existing technologies have the following defects: the first and second intermediate shafts are connected to the connecting shaft by threaded rods, and the fixation is only achieved by the threaded rods, which is prone to loosening; the dust cover is fixed by the first clamp, the second clamp and the fixing sleeve, which is not secure and is prone to falling off. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a new type of automotive drive shaft.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an automotive drive shaft, including a first intermediate shaft with an outer ball cage on one side, a second intermediate shaft with an inner ball cage on one side, and a connecting shaft. Each of the first and second intermediate shafts has a first connecting plate at one facing end. Each of the connecting shafts has a second connecting plate with a mounting groove on one side at both ends. The side surface of the first connecting plate is threaded to the second connecting plate by multiple first bolts, and the circumferential surface of the first connecting plate is threaded to the second connecting plate by multiple second bolts. A positioning device is provided between adjacent first and second connecting plates. Dust covers are provided on the facing sides of the outer and inner ball cages. Each dust cover includes a first half-shell and a second half-shell, which are connected by a fixing device.

[0008] Preferably, the positioning device includes a plurality of first positioning posts and a plurality of second positioning posts. The plurality of first positioning posts are all disposed on one side surface of the first connecting plate, and the plurality of second positioning posts are all disposed on one side inner wall of the mounting groove. The one side inner wall of the mounting groove has a plurality of first positioning grooves corresponding to the first positioning posts one by one, and the first positioning posts extend into the first positioning grooves. The one side surface of the first connecting plate has a plurality of second positioning grooves corresponding to the second positioning posts one by one, and the second positioning posts extend into the second positioning grooves.

[0009] Preferably, the fixing device includes a first clamp and a second clamp. One end of the outer ball cage, the inner ball cage, and the dust cover is provided with an annular protrusion. The opposing surfaces of the first clamp and the second clamp are provided with an annular groove. The annular protrusion extends into the annular groove. The two ends of the first half shell are respectively provided with a first mounting ear. The two ends of the second half shell are respectively provided with a second mounting ear. A third bolt is slidably connected inside adjacent first mounting ears and second mounting ears. One end of the third bolt is threaded with a nut.

[0010] Preferably, a washer is provided between the nut and the first mounting lug.

[0011] Preferably, the surface of the first intermediate shaft is provided with a limiting block that abuts against the dust cover, and the surface of the second intermediate shaft is also provided with a limiting block that abuts against the dust cover.

[0012] Preferably, the cross-section of the second connecting plate is a regular hexagon.

[0013] The automotive drive shaft proposed in this utility model has the following advantages: the first and second intermediate shafts are not only connected to the connecting shaft by the first bolt, but also connected to the first connecting disk by the second bolt passing through the circumferential surface of the second connecting disk and threadedly connected to the first connecting disk. The first and second bolts are threaded to the first connecting disk in different directions, ensuring that the first and second intermediate shafts are securely fixed to the connecting shaft and are not prone to loosening. When cleaning the first and second half-shells, the nuts are loosened, the third bolt is removed, and then the first and second clamps are removed, allowing the first and second half-shells to be disassembled for cleaning. The annular protrusion engages with the annular groove to prevent the dust cover from falling off. In summary, the first and second clamps are securely fixed by the third bolt and nut, making them difficult to detach. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is an enlarged view of position A in this utility model;

[0016] Figure 3This is a cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is an enlarged view of position B in this utility model;

[0018] Figure 5 This is an enlarged view of position C of this utility model;

[0019] Figure 6 This is a schematic diagram of the fixing device structure of this utility model;

[0020] Figure 7 This is an enlarged view of position D of this utility model;

[0021] Figure 8 This is a schematic diagram of the gasket structure of this utility model.

[0022] In the diagram: 1. First intermediate shaft; 2. Second intermediate shaft; 3. Connecting shaft; 4. Outer ball cage; 5. Inner ball cage; 6. First connecting plate; 7. Second connecting plate; 8. Mounting groove; 9. First bolt; 10. Second bolt; 11. Dust cover; 12. First half shell; 13. Second half shell; 14. First clamp; 15. Second clamp; 16. Annular protrusion; 17. Annular groove; 18. First positioning post; 19. First positioning groove; 20. Second positioning post; 21. Second positioning groove; 22. First mounting ear; 23. Second mounting ear; 24. Third bolt; 25. Nut; 26. Washer; 27. Limiting block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-8 An automotive drive shaft includes a first intermediate shaft 1 with an outer ball cage 4 on one side, a second intermediate shaft 2 with an inner ball cage 5 on one side, and a connecting shaft 3. The first intermediate shaft 1 and the second intermediate shaft 2 each have a first connecting plate 6 at their opposite ends. The connecting shaft 3 has a second connecting plate 7 at both ends, with a mounting groove 8 on one side. The side surface of the first connecting plate 6 is threaded to the second connecting plate 7 by multiple first bolts 9, and the circumferential surface of the first connecting plate 6 is threaded to the second connecting plate 7 by multiple second bolts 10. A positioning device is provided between adjacent first connecting plates 6 and second connecting plates 7. Dust covers 11 are provided on opposite sides of the outer ball cage 4 and the inner ball cage 5. Each dust cover 11 includes a first half-shell 12 and a second half-shell 13, which are connected by a fixing device.

[0025] The positioning device includes multiple first positioning posts 18 and multiple second positioning posts 20. The multiple first positioning posts 18 are all disposed on one side surface of the first connecting plate 6, and the multiple second positioning posts 20 are all disposed on one side inner wall of the mounting groove 8. The inner wall of one side of the mounting groove 8 has multiple first positioning grooves 19 corresponding to the first positioning posts 18, and the first positioning posts 18 extend into the first positioning grooves 19. The surface of one side of the first connecting plate 6 has multiple second positioning grooves 21 corresponding to the second positioning posts 20, and the second positioning posts 20 extend into the second positioning grooves 21.

[0026] The fixing device includes a first clamp 14 and a second clamp 15. One end of the outer ball cage 4, the inner ball cage 5 and the dust cover 11 is provided with an annular protrusion 16. The opposing surfaces of the first clamp 14 and the second clamp 15 are provided with an annular groove 17. The annular protrusion 16 extends into the annular groove 17. The two ends of the first half shell 12 are respectively provided with a first mounting ear 22, and the two ends of the second half shell 13 are respectively provided with a second mounting ear 23. The interiors of adjacent first mounting ears 22 and second mounting ears 23 are slidably connected with a third bolt 24. One end of the third bolt 24 is threadedly connected with a nut 25.

[0027] A washer 26 is provided between the nut 25 and the first mounting ear 22. The washer 26 increases the tightness of the connection between the nut 25 and the first mounting ear 22.

[0028] The surface of the first intermediate shaft 1 is provided with a limiting block 27 that abuts against the dust cover 11, and the surface of the second intermediate shaft 2 is also provided with a limiting block 27 that abuts against the dust cover 11. The limiting block 27 serves to position the dust cover 11.

[0029] The second connecting plate 7 has a regular hexagonal cross-section, which facilitates the fixing of the second bolt 10.

[0030] Working principle: When the first intermediate shaft 1, the second intermediate shaft 2, and the connecting shaft 3 are connected, the first positioning pin 18 is inserted into the first positioning groove 19 and the second positioning pin 20 is inserted into the second positioning groove 21 through the positioning device. Then, the first intermediate shaft 1 and the second intermediate shaft 2 are respectively connected to the connecting shaft 3. Then, the first bolt 9 passes through the side surface of the second connecting plate 7 and is threaded to the first connecting plate 6. The second bolt 10 passes through the circumferential surface of the second connecting plate 7 and is threaded to the first connecting plate 6. In summary, the first intermediate shaft 1 and the second intermediate shaft 2 are not only connected to the connecting shaft 3 by the first bolt 9, but also connected to the first connecting plate 6 by the second bolt 10 passing through the circumferential surface of the second connecting plate 7. The first bolt 9 and the second bolt 10 are threaded to the first connecting plate 6 in different directions, so that the first intermediate shaft 1 and the second intermediate shaft 2 are respectively firmly fixed to the connecting shaft 3 and are not easy to loosen.

[0031] When cleaning the first half-shell 12 and the second half-shell 13 using the fixing device, loosen the nut 25, then remove the third bolt 24, and then remove the first clamp 14 and the second clamp 15. This allows the first half-shell 12 and the second half-shell 13 to be disassembled for cleaning. The annular protrusion 16 engages with the annular groove 17 to prevent the dust cover 11 from falling off. In summary, the first clamp 14 and the second clamp 15 are fixed by the third bolt 24 and the nut 25. This fixing method is reliable and not easy to fall off.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automobile drive shaft comprising a first intermediate shaft (1) provided with an outer cage (4) on one side, a second intermediate shaft (2) provided with an inner cage (5) on one side, and a connecting shaft (3), characterized in that, The first intermediate shaft (1) and the second intermediate shaft (2) are provided with first connecting discs (6) at opposite ends, the connecting shaft (3) is provided with second connecting discs (7) with mounting grooves (8) at opposite ends, the side surface of the first connecting disc (6) is threadedly connected with the second connecting disc (7) through a plurality of first bolts (9), the circumferential surface of the first connecting disc (6) is threadedly connected with the second connecting disc (7) through a plurality of second bolts (10), the positioning device is arranged between adjacent first connecting discs (6) and second connecting discs (7), the opposite side of the outer ball cage (4) and the inner ball cage (5) is provided with a dust cover (11), and the dust cover (11) comprises first half shells (12) and second half shells (13).

2. An automotive drive shaft as claimed in claim 1, wherein, The positioning device comprises a plurality of first positioning columns (18) and a plurality of second positioning columns (20), the first positioning columns (18) are arranged on the side surface of the first connecting disc (6), the second positioning columns (20) are arranged on the side inner wall of the mounting groove (8), the side inner wall of the mounting groove (8) is provided with a plurality of first positioning grooves (19) corresponding to the first positioning columns (18) in one-to-one correspondence, the first positioning columns (18) extend into the first positioning grooves (19), and the side surface of the first connecting disc (6) is provided with a plurality of second positioning grooves (21) corresponding to the second positioning columns (20) in one-to-one correspondence.

3. The automotive drive shaft of claim 1, wherein, The fixing device comprises first clamps (14) and second clamps (15), the outer ball cage (4), the inner ball cage (5) and the dust cover (11) are provided with annular protrusions (16) at one end, the side surface of the first clamp (14) and the second clamp (15) is provided with an annular groove (17) in a direction facing each other, the annular protrusion (16) extends into the annular groove (17), the first half shell (12) is provided with first mounting ears (22) at both ends, the second half shell (13) is provided with second mounting ears (23) at both ends, the third bolts (24) are slidably connected in the first mounting ears (22) and the second mounting ears (23), and one end of the third bolt (24) is threadedly connected with a nut (25).

4. An automotive drive shaft as claimed in claim 3, wherein, The gasket (26) is arranged between the nut (25) and the first mounting ear (22).

5. The automotive drive shaft of claim 1, wherein, The surface of the first intermediate shaft (1) is provided with a limiting block (27) abutting against the dust cover (11), and the surface of the second intermediate shaft (2) is also provided with a limiting block (27) abutting against the dust cover (11).

6. The automotive drive shaft of claim 1, wherein, The cross section of the second connecting disc (7) is a regular hexagon.

Images