Connecting structure of speed reducer and electric drive axle

Abstract

The utility model relates to the technical field of automobile auxiliary equipment, in particular to a speed reducer and electric drive axle connecting structure which comprises a connecting part and an operating part, the connecting part penetrates through a speed reducer, one end of the connecting part is inserted into an electric drive axle and is in threaded connection with the electric drive axle, and the operating part is located at the other end of the connecting part and is rotationally connected with the connecting part. When the speed reducer and the electric drive axle are connected, the axial direction of the operation part and the axial direction of the connection part are parallel, and after the speed reducer and the electric drive axle are connected, the axis of the operation part and the axis of the connection part are perpendicular to each other. The operating part is rotatably mounted on the connecting part, the connecting part is controlled by the operating part to rotate so as to realize connection of the speed reducer and the electric drive axle, and compared with an existing mode by means of an external tool, the mode is simple in structure and convenient to operate, and connection between the speed reducer and the electric drive axle in a narrow space can be facilitated; the connecting efficiency between the speed reducer and the electric drive axle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile auxiliary equipment especially a connecting structure of speed reducer and electric drive axle. BACKGROUND

[0002] The main function of the speed reducer is to flexibly distribute torque between two output shafts to ensure smooth vehicle travel. In electric vehicles, the electric drive axle is responsible for converting the battery pack's electrical energy into mechanical energy to drive the vehicle. The speed reducer is connected to the electric drive axle to ensure that during vehicle travel, the torque transmitted by the electric motor is reasonably distributed to the left and right wheels according to road conditions and power requirements. Therefore, we urgently need a connecting structure of speed reducer and electric drive axle.

[0003] Currently, the connecting method of speed reducer and electric drive axle is through threaded connection of bolts. This connection can achieve fixed connection of speed reducer and electric drive axle. However, due to the threaded connection of bolts, additional tools are needed for operation, which is inconvenient in the narrow space inside the vehicle. SUMMARY

[0004] In view of the above shortcomings in the existing production technology, the applicant provides a connecting structure of speed reducer and electric drive axle, which can facilitate the connection between speed reducer and electric drive axle in narrow space through improvement of the connecting structure.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A connecting structure of speed reducer and electric drive axle comprises a connecting part and an operating part. The connecting part penetrates the speed reducer. One end of the connecting part is inserted into the electric drive axle and is threadedly connected with the electric drive axle. The operating part is located at the other end of the connecting part and is rotationally connected with the connecting part. When the speed reducer and the electric drive axle are connected, the axial directions of the operating part and the connecting part are parallel. When the speed reducer and the electric drive axle are connected, the axial directions of the operating part and the connecting part are perpendicular.

[0007] Thus, the operating part is rotationally installed on the connecting part. The operating part controls the rotation of the connecting part to realize the connection of the speed reducer and the electric drive axle. Compared with the existing method of using external tools, this method has a simple structure and is convenient to operate, which can facilitate the connection between the speed reducer and the electric drive axle in narrow space and improve the connection efficiency between the speed reducer and the electric drive axle. In addition, after the connection of the speed reducer and the electric drive axle is completed, the operating part can be rotated to a position perpendicular to the axis of the connecting part to ensure that the operating part is not exposed to the outside of the speed reducer, thereby ensuring that the operating part does not interfere with the use of the speed reducer and the electric drive axle.

[0008] As a further improvement of the above technical solution: the speed reducer is provided with a first through hole and a second through hole, the second through hole is located on the side of the first through hole close to the electric drive axle, and the first through hole is in communication with the second through hole.

[0009] As a further improvement of the above technical solution: further comprising: a limiting mechanism, the limiting mechanism comprises: a limiting piece and an annular limiting groove, the limiting piece penetrates through the operation part and is in sliding connection with the operation part, and the annular limiting groove is provided on the side wall of the first through hole; when the speed reducer and the electric drive axle are connected, the limiting piece is not inserted into the annular limiting groove; and when the connection between the speed reducer and the electric drive axle is completed, the limiting piece is inserted into the annular limiting groove. Thus, since the operation part is in rotational connection with the connecting part, after the connection between the speed reducer and the electric drive axle is completed, the limiting piece is inserted into the annular limiting groove, and the operation part is limited and constrained by the limiting piece, so that the operation part cannot rotate relative to the connecting part, thereby ensuring that the operation part is not exposed to the outside of the speed reducer, and further ensuring that the operation part does not interfere with the use of the speed reducer and the electric drive axle.

[0010] As a further improvement of the above technical solution: the end of the limiting piece close to the annular limiting groove is provided with a first magnet, the side wall of the annular limiting groove close to the limiting piece is provided with a second magnet, and the magnetism of the first magnet and the magnetism of the second magnet repel each other. Thus, after the connection between the speed reducer and the electric drive axle is completed, the limiting piece is inserted into the annular limiting groove, and the limiting piece is adsorbed on the speed reducer through the mutual cooperation of the first magnet and the second magnet with repelling magnetism, so that the limiting piece cannot be released from the restraint of the speed reducer without the aid of external force, and the operation part cannot rotate relative to the connecting part.

[0011] As a further improvement of the above technical solution: the connecting part comprises: a connecting section and a supporting section, the connecting section is connected with the supporting section, the connecting section penetrates through the speed reducer, one end of the connecting section away from the supporting section is inserted into the electric drive axle and is in threaded connection with the electric drive axle, and the operation part is in rotational connection with the supporting section.

[0012] As a further improvement of the above technical solution: a threaded groove is provided on the side of the electric drive axle close to the speed reducer, and one end of the connecting section away from the supporting section is inserted into the threaded groove and is in threaded connection with the electric drive axle.

[0013] As a further improvement of the above technical solution: the outer circumferential surface of the connecting section is provided with threads, and the threads are matched with the threaded groove.

[0014] As a further improvement of the above technical solution: the diameter of the first through hole is d1, and the diameter of the second through hole is d2.

[0015] As a further improvement of the above technical solution: the diameter of the connecting section is d3, the diameter of the supporting section is d4; d1>d3>d2>d4. Thus, by the design of d1>d3, sufficient accommodation space is ensured in the first through hole for placing the operating part; by the design of d3>d2, the supporting section can be pressed against the reducer when the reducer is connected with the electric drive axle; by the design of d2>d4, the reducer will not interfere with the rotation of the connecting section.

[0016] As a further improvement of the above technical solution: the operating part is provided with a third through hole, a fourth through hole is formed in the third through hole, and the third through hole is in communication with the fourth through hole; a limiting piece is sleeved with a limiting block at the middle position, the limiting piece penetrates through the third through hole and is in sliding connection with the operating part, and the limiting block is located in the fourth through hole; the length of the fourth through hole is L1, and the length of the limiting block is L2, and L1>L2. Thus, the limiting piece will not be separated from the operating part by the limiting block; by the design of L1>L2, sufficient accommodation space is ensured for the limiting rod to move.

[0017] The beneficial effects of the present application are as follows:

[0018] By rotating the operating part on the connecting section, the rotation of the connecting section is controlled by the operating part to realize the connection of the reducer and the electric drive axle. Compared with the existing method of using external tools, this method has a simple structure and is easy to operate, which can facilitate the connection between the reducer and the electric drive axle in a narrow space, thereby improving the connection efficiency between the reducer and the electric drive axle. In addition, after the reducer and the electric drive axle are connected, the operating part can be rotated to a position perpendicular to the axis of the connecting section, so that the operating part will not be exposed to the outside of the reducer, thereby ensuring that the operating part will not interfere with the use of the reducer and the electric drive axle.

[0019] The present application also has the following advantages:

[0020] 1. After the reducer and the electric drive axle are connected, the limiting piece is inserted into the annular limiting groove, and the operating part is limited and constrained by the limiting piece, so that the operating part cannot rotate relative to the connecting section. In this way, the operating part will not be exposed to the outside of the reducer, thereby ensuring that the operating part will not interfere with the use of the reducer and the electric drive axle.

[0021] 2. After the reducer and the electric drive axle are connected, the limiting piece is inserted into the annular limiting groove, and the first magnet and the second magnet repel each other to attract the limiting piece to the reducer. In this way, without the aid of external force, the limiting piece will not be separated from the reducer, and the operating part cannot rotate relative to the connecting section.

[0022] 3. The utility model discloses a design mode of d1>d3 to ensure that the first through hole has enough accommodation space for placing the operation part, a design mode of d3>d2 to ensure that the support section can compress the speed reducer when the speed reducer is connected with the electric drive bridge, and a design mode of d2>d4 to ensure that the speed reducer does not interfere with the rotation of the connecting part. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic drawing of the speed reducer and electric drive bridge connecting structure non-operation state of the utility model;

[0024] Figure 2 It is the sectional view of the speed reducer and electric drive bridge connecting structure non-operation state of the utility model;

[0025] Figure 3 It is the speed reducer and electric drive bridge connecting structure of the utility model; Figure 2 It is the enlarged schematic view of the local structure in A of the utility model.

[0026] Figure 4 It is the structure schematic drawing of the speed reducer and electric drive bridge connecting structure operation state of the utility model;

[0027] Figure 5 It is the effect drawing of the speed reducer and electric drive bridge connecting of the utility model;

[0028] Figure 6 It is the explosion drawing of the speed reducer and electric drive bridge connecting of the utility model;

[0029] Figure 7 It is the sectional view effect drawing of the speed reducer and electric drive bridge connecting of the utility model;

[0030] Figure 8 It is the sectional view explosion drawing of the speed reducer and electric drive bridge connecting of the utility model;

[0031] Figure 9 It is the speed reducer and electric drive bridge connecting structure of the utility model; Figure 8 It is the enlarged schematic view of the local structure in B of the utility model.

[0032] 1, connecting part;

[0033] 101, connecting section; 102, support section;

[0034] 2, speed reducer;

[0035] 201, first through hole; 202, second through hole;

[0036] 3, electric drive bridge;

[0037] 301, thread groove;

[0038] 4, operation part;

[0039] 401 third through hole; 402 fourth through hole;

[0040] 5, limiting mechanism;

[0041] 501, limiting piece; 5011, first magnet; 5012, limiting block; 502, annular limiting groove; 5021, second magnet. DETAILED DESCRIPTION

[0042] The specific implementation of the utility model will be described below in combination with the drawings.

[0043] As Figures 1 to 9 shown, it is the optimal embodiment of the utility model, the reducer and the electric drive bridge connecting structure of the embodiment, include: connecting portion 1 and operating portion 4, connecting portion 1 passes through reducer 2, and one end of connecting portion 1 is inserted into electric drive bridge 3, and is screw-connected with electric drive bridge 3, operating portion 4 is located at the other end of connecting portion 1, and operating portion 4 is rotationally connected with connecting portion 1, when connecting reducer 2 and electric drive bridge 3, the axial direction of operating portion 4 and connecting portion 1 is parallel to each other, when reducer 2 and electric drive bridge 3 are connected, the axial direction of operating portion 4 and connecting portion 1 is perpendicular to each other. Therefore, operating portion 4 is rotationally installed on connecting portion 1, and connecting portion 1 is rotated by operating portion 4 to realize the connection of reducer 2 and electric drive bridge 3. Compared with the existing mode of using external tools, the mode is simple in structure and convenient to operate, and can facilitate the connection between reducer 2 and electric drive bridge 3 in narrow space, to improve the connection efficiency between reducer 2 and electric drive bridge 3. In addition, after reducer 2 and electric drive bridge 3 are connected, operating portion 4 can be rotated to a position perpendicular to the axial line of connecting portion 1, to ensure that operating portion 4 is not exposed to the outside of reducer 2, and further ensure that operating portion 4 does not interfere with the use of reducer 2 and electric drive bridge 3.

[0044] It should be noted that:

[0045] I. Non-operation state (as Figure 1 shown) refers to: the state that the axial direction of operating portion 4 and connecting portion 1 is perpendicular to each other, in this state, operating portion 4 is in reducer 2, and operating portion 4 cannot operate connecting portion 1;

[0046] II. Operating state (as Figure 4 shown) refers to: the state that the axial direction of operating portion 4 and connecting portion 1 is parallel to each other (since operating portion 4 and connecting portion 1 are rotationally connected, so the parallel to each other means coinciding with each other), in this state, operating portion 4 is located outside reducer 2, and connecting portion 1 can be operated by operating portion 4, so as to realize the connection of reducer 2 and electric drive bridge 3.

[0047] In this embodiment, the reducer 2 has a first through hole 201 and a second through hole 202. The second through hole 202 is located on the side of the first through hole 201 near the electric drive bridge 3, and the first through hole 201 and the second through hole 202 are connected.

[0048] In this embodiment, a limiting mechanism 5 is also included. The limiting mechanism 5 includes a limiting member 501 and an annular limiting groove 502. The limiting member 501 passes through the operating part 4 and is slidably connected to the operating part 4. The annular limiting groove 502 is formed on the side wall of the first through hole 201. When the reducer 2 is connected to the electric drive bridge 3, the limiting member 501 is not inserted into the annular limiting groove 502. After the reducer 2 and the electric drive bridge 3 are connected, the limiting member 501 is inserted into the annular limiting groove 502. A first magnet 5011 is provided at one end of the limiting member 501 near the annular limiting groove 502. A second magnet 5021 is provided on the side wall of the near-limiting member 501. The magnetism of the first magnet 5011 is repulsive to that of the second magnet 5021. The operating part 4 has a third through hole 401, and a fourth through hole 402 is provided inside the third through hole 401. The third through hole 401 and the fourth through hole 402 are connected. A limiting block 5012 is sleeved in the middle position of the limiting member 501. The limiting member 501 passes through the third through hole 401 and is slidably connected to the operating part 4. The limiting block 5012 is located inside the fourth through hole 402. The length of the fourth through hole 402 is L1, and the length of the limiting block 5012 is L2, where L1 > L2. Therefore, since the operating part 4 is rotatably connected to the connecting part 1, after the reducer 2 and the electric drive bridge 3 are connected, the limiting member 501 is inserted into the annular limiting groove 502. The limiting member 501 limits and constrains the operating part 4 to ensure that the operating part 4 cannot rotate relative to the connecting part 1. This ensures that the operating part 4 is not exposed to the outside of the reducer 2, and thus ensures that the operating part 4 will not interfere with the use of the reducer 2 and the electric drive bridge 3. After the reducer 2 and the electric drive bridge 3 are connected, the limiting member 501 is inserted into the annular limiting groove 502. Within the shaped limiting groove 502, the first magnet 5011 and the second magnet 5021, which repel each other magnetically, allow the limiting member 501 to be attracted to the reducer 2. Thus, without the aid of external force, the limiting member 501 will not detach from the reducer 2, and the operating part 4 cannot rotate relative to the connecting part 1. The limiting block 5012 ensures that the limiting member 501 will not detach from the operating part 4. The design of L1 > L2 ensures that the operating part 4 has sufficient space to accommodate the movement of the limiting rod.

[0049] In the embodiment, the connecting part 1 comprises a connecting section 101 and a supporting section 102, the connecting section 101 is connected with the supporting section 102, the connecting section 101 penetrates the speed reducer 2, one end of the connecting section 101 away from the supporting section 102 is inserted into the electric drive axle 3 and is threadedly connected with the electric drive axle 3, and the operating part 4 is rotationally connected with the supporting section 102; the diameter of the first through hole 201 is d1, the diameter of the second through hole 202 is d2; the diameter of the connecting section 101 is d3, the diameter of the supporting section 102 is d4; d1>d3>d2>d4. Thus, by the design mode of d1>d3, enough accommodation space for placing the operating part 4 in the first through hole 201 is ensured; by the design mode of d3>d2, when the speed reducer 2 is connected with the electric drive axle 3, the supporting section 102 can press the speed reducer 2; by the design mode of d2>d4, the speed reducer 2 will not interfere with the rotation of the connecting part 1.

[0050] The electric drive axle 3 is provided with a threaded groove 301 on the side close to the speed reducer 2, one end of the connecting section 101 away from the supporting section 102 is inserted into the threaded groove 301 and is threadedly connected with the electric drive axle 3; the outer circumferential surface of the connecting section 101 is provided with threads which are matched with the threaded groove 301.

[0051] The connecting process of the speed reducer 2 with the electric drive axle 3 is as follows: firstly, the speed reducer 2 to be connected is abutted with the electric drive axle 3, and the second through hole 202 is aligned with the threaded groove 301; then, the connecting part 1 is sequentially inserted through the first through hole 201, the second through hole 202 and the threaded groove 301; then, the connecting part 1 is rotated by the operating part 4, and the speed reducer 2 and the electric drive axle 3 are connected by the connecting part 1; finally, the operating part 4 is rotated by °, so that the operating part 4 is located in the speed reducer 2, the limiting part 501 is pushed to the side close to the annular limiting groove 502, and the limiting part 501 is adsorbed on the speed reducer 2 by the repulsion of the first magnet 5011 and the second magnet 5021.

[0052] In summary, the operating part 4 is rotationally installed on the connecting part 1, the connecting part 1 is rotated by the operating part 4, the connection between the speed reducer 2 and the electric drive axle 3 is realized, compared with the existing mode of using external tools, the mode has the advantages of simple structure, convenient operation, convenient connection between the speed reducer 2 and the electric drive axle 3 in narrow space, improved connection efficiency between the speed reducer 2 and the electric drive axle 3, and the like, in addition, after the connection between the speed reducer 2 and the electric drive axle 3 is completed, the operating part 4 can be rotated to a position perpendicular to the axis of the connecting part 1, so that the operating part 4 is not exposed to the outside of the speed reducer 2, and the use of the speed reducer 2 and the electric drive axle 3 is not interfered.

[0053] The above description is an explanation of the present application, not a limitation of the present application, and the scope of the present application is defined in the claims. Any modification can be made within the scope of the present application.

Claims

1. A reducer and electric drive axle connection structure, characterized by, The utility model relates to a kind of electric drive axle connecting device, including: Connecting part (1), the connecting part (1) is through reduction gear (2), one end of the connecting part (1) is inserted into electric drive axle (3), and is connected with electric drive axle (3) threadedly; Operating part (4), the operating part (4) is located the other end of the connecting part (1), and the operating part (4) is rotatably connected with the connecting part (1), when connecting operation is carried out to reduction gear (2) and electric drive axle (3), the axial direction of the operating part (4) and the connecting part (1) is parallel to each other, when reduction gear (2) and electric drive axle (3) are connected, the axial direction of the operating part (4) and the connecting part (1) is perpendicular to each other.

2. The reducer and electric drive axle connection structure according to claim 1, characterized by: The reduction gear (2) is provided with a first through hole (201) and a second through hole (202), the second through hole (202) is located on the side of the first through hole (201) close to the electric drive axle (3), and the first through hole (201) and the second through hole (202) are communicated.

3. The reducer and electric drive axle connection structure according to claim 2, characterized by: Also including: Limiting mechanism (5), the limiting mechanism (5) includes: Limiting piece (501) and annular limiting groove (502), the limiting piece (501) is through the operating part (4), and is slidably connected with the operating part (4), the annular limiting groove (502) is opened on the side wall of the first through hole (201), when connecting operation is carried out to reduction gear (2) and electric drive axle (3), the limiting piece (501) is not inserted into the annular limiting groove (502), when reduction gear (2) and electric drive axle (3) are connected, the limiting piece (501) is inserted into the annular limiting groove (502).

4. The reducer and electric drive axle connection structure according to claim 3, characterized by: The end of the limiting piece (501) close to the annular limiting groove (502) is provided with a first magnet (5011), the side wall of the annular limiting groove (502) close to the limiting piece (501) is provided with a second magnet (5021), the magnetism of the first magnet (5011) and the magnetism of the second magnet (5021) repel each other.

5. The reducer and electric drive axle connection structure according to claim 2, characterized by: The connecting part (1) includes: Connecting section (101) and support section (102), the connecting section (101) is connected with the support section (102), the connecting section (101) is through the reduction gear (2), one end of the connecting section (101) away from the support section (102) is inserted into the electric drive axle (3), and is connected with the electric drive axle (3) threadedly, the operating part (4) is rotatably connected with the support section (102).

6. The reducer and electric drive axle connection structure according to claim 5, characterized by: The side of the electric drive axle (3) close to the reduction gear (2) is provided with a threaded groove (301), one end of the connecting section (101) away from the support section (102) is inserted into the threaded groove (301), and is connected with the electric drive axle (3) threadedly.

7. The reducer and electric drive axle connection structure according to claim 6, characterized by: The outer circumferential surface of the connecting section (101) is provided with a thread, and the thread is matched with the threaded groove (301).

8. The reducer and electric drive axle connection structure according to claim 5, characterized by: The diameter of the first through hole (201) is d1, and the diameter of the second through hole (202) is d2.

9. The reducer and electric drive axle connection structure according to claim 8, characterized by: The diameter of the connecting section (101) is d3, and the diameter of the support section (102) is d4; d1>d3>d2>d4.

10. The reducer and electric drive axle connection structure according to claim 3, characterized by: The operating part (4) is provided with a third through hole (401), and the third through hole (401) is provided with a fourth through hole (402) therein, and the third through hole (401) is communicated with the fourth through hole (402); The middle position of the limiting piece (501) is sleeved with a limiting block (5012), the limiting piece (501) penetrates through the third through hole (401) and is slidably connected with the operating part (4), and the limiting block (5012) is located in the fourth through hole (402); The length of the fourth through hole (402) is L1, the length of the limiting block (5012) is L2, and L1>L2.

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