Connecting structure and electric driving system

Abstract

The utility model provides a connecting structure and an electric driving system. The connecting structure comprises a connecting main body, the connecting main body is provided with a motor shaft first via hole, the connecting main body is provided with a connecting avoiding structure, a connecting hole, an avoiding hole and a first counterbore which are located on the periphery of the motor shaft first via hole, and the connecting avoiding structure, the connecting hole, the avoiding hole and the first counterbore are arranged at intervals in the circumferential direction of the connecting main body; the connection avoiding structure comprises a second counterbore and an avoiding blind hole, and the second counterbore and the avoiding blind hole are at least partially overlapped. According to the technical scheme, the connecting structure can solve the problems that due to the fact that the screw head of a bolt or a screw of an existing connecting structure is exposed, the structural compactness and attractiveness of an electric drive system are affected, and the space utilization rate is also affected.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical reducer accessories, and in particular to a connection structure and an electric drive system. Background Art

[0002] In recent years, the new energy vehicle sector has rapidly developed. As one of the core components of new energy vehicles, the electric drive system's driving characteristics determine the vehicle's primary performance indicators. The electric drive system primarily consists of two key components: the motor and the reducer, which together determine the driving characteristics of new energy vehicles. The motor converts electrical energy into mechanical energy, providing power to the vehicle; the reducer ensures efficient utilization of the motor's output by reducing speed and increasing torque. Sophisticated motor and reducer designs can significantly improve the overall efficiency and stability of the electric drive system. Furthermore, their rapid implementation in research and development can help shorten R&D cycles and reduce production costs.

[0003] However, the heads of the bolts or screws used for connecting the existing motor and reducer are exposed, which not only affects the structural compactness and aesthetics of the electric drive system, but also affects the space utilization. Utility Model Content

[0004] The main purpose of the present utility model is to provide a connection structure and an electric drive system, which can solve the problem that the screw heads of the bolts or screws of the existing connection structure are exposed, which not only affects the structural compactness and aesthetics of the electric drive system, but also affects the space utilization.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a connection structure is provided, including: a connecting body, having a first through hole of the motor shaft, and a connecting avoidance structure, a connecting hole, an avoidance hole and a first countersunk hole located on the periphery of the first through hole of the motor shaft. The connecting avoidance structure, the connecting hole, the avoidance hole and the first countersunk hole are arranged at intervals along the circumference of the connecting body, and the connecting avoidance structure includes a second countersunk hole and an avoidance blind hole, and the second countersunk hole and the avoidance blind hole at least partially overlap.

[0006] Furthermore, the connection structure also includes a first connection member and a second connection member, the first connection member is constructed to pass through the motor end cover and the connection hole in sequence, and the second connection member is constructed to pass through the first countersunk hole and the reducer in sequence.

[0007] Furthermore, the connection structure also includes a third connection member, which is configured to pass through the second countersunk hole and the reducer in sequence.

[0008] Furthermore, the avoidance hole is a blind hole or a through hole.

[0009] Furthermore, the connecting body is a circular ring structure, and the area surrounded by the inner circumference of the circular ring structure forms the first through hole of the motor shaft.

[0010] Furthermore, a positioning hole is provided on the connecting body.

[0011] According to another aspect of the present invention, an electric drive system is provided, comprising: the above-mentioned connection structure; a motor, comprising a motor shaft; a motor end cover, the motor end cover being connected to the first end of the motor, and the motor end cover being connected to the connection body, a second through hole of the motor shaft being provided on the motor end cover, the second through hole of the motor shaft being provided corresponding to the first through hole of the motor shaft, and the motor shaft being passed through the second through hole of the motor shaft and the first through hole of the motor shaft in sequence; and a reducer, the reducer being connected to the connection body.

[0012] Furthermore, along the radial direction of the motor shaft, the motor end cover has a lateral protrusion protruding from the outer circumferential surface of the motor shaft, and the first connecting member is configured to pass through the lateral protrusion.

[0013] Furthermore, a boss is provided on the side of the motor end cover facing away from the motor, and the boss is passed through the first through hole of the motor shaft.

[0014] Furthermore, the electric drive system also includes a fourth connecting member, which is sequentially passed through the motor end cover and the motor, and the portion of the fourth connecting member located on the side of the motor end cover away from the motor is entirely located in the avoidance hole or the avoidance blind hole.

[0015] By applying the technical solution of the present invention, a connecting body is provided, and a connecting avoidance structure, a connecting hole, an avoidance hole and a first countersunk hole are provided on the connecting body, which are located on the periphery of the first through-hole of the motor shaft. The screw heads of some screws for connecting the connecting body and the reducer are located in the first countersunk hole, the screw heads of some screws for connecting the connecting body and the reducer are located in the second countersunk hole, the screw heads of some screws for connecting the motor and the motor end cover are located in the avoidance blind hole, and the screw heads of some screws for connecting the motor and the motor end cover are located in the avoidance hole. Through the above arrangement, it is possible to avoid the exposure of the bolts or screw heads of the existing connecting structure, reduce the assembly size between the motor and the reducer, thereby improving the structural compactness, aesthetics and space utilization of the connecting structure, and avoid interference between the connecting body and the screw heads of the screws for connecting the motor and the motor end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] In the picture:

[0018] Figure 1A schematic structural diagram of a connecting body according to an embodiment of the present utility model is shown;

[0019] Figure 2 A partial structural schematic diagram of an electric drive system according to an embodiment of the present utility model is shown;

[0020] Figure 3 A partial structural schematic diagram of an electric drive system according to an embodiment of the present utility model is shown;

[0021] Figure 4 A partial structural schematic diagram of an electric drive system according to an embodiment of the present utility model is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. Connecting body; 11. First through hole of motor shaft; 12. Connection avoidance structure; 121. Second countersunk hole; 122. Avoidance blind hole; 13. Connecting hole; 14. Avoidance hole; 15. First countersunk hole; 16. Positioning hole; 20. First connecting piece; 40. Motor end cover; 41. Lateral protrusion; 42. Boss; 50. Reducer; 60. Third connecting piece; 70. Motor; 71. Motor shaft; 80. Fourth connecting piece. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] See also Figures 1 to 4 As shown, the utility model provides a connection structure, which includes: a connection body 10, having a first through hole 11 of the motor shaft, and a connection avoidance structure 12, a connection hole 13, an avoidance hole 14 and a first countersunk hole 15 located on the outer periphery of the first through hole 11 of the motor shaft are provided on the connection body 10. The connection avoidance structure 12, the connection hole 13, the avoidance hole 14 and the first countersunk hole 15 are arranged at intervals along the circumference of the connection body 10, and the connection avoidance structure 12 includes a second countersunk hole 121 and an avoidance blind hole 122, and the second countersunk hole 121 and the avoidance blind hole 122 at least partially overlap.

[0026] In this embodiment, the first through hole 11 of the motor shaft is used to pass through the motor shaft 71. When the connection structure of the present application is used to connect the motor 70 and the reducer 50, first, the screw is passed through the first countersunk hole 15 and the reducer 50 in sequence to connect the connection body 10 with the reducer 50, and then the screw is passed through the motor end cover 40 and the connection hole 13 in sequence to connect the connection body 10 with the motor end cover 40. Alternatively, the screw is passed through the motor end cover 40 and the connection hole 13 in sequence to connect the connection body 10 with the motor end cover 40, and then the screw is passed through the first countersunk hole 15 and the reducer 50 in sequence to connect the connection body 10 with the reducer 50, thereby achieving the connection between the motor 70 and the reducer 50.

[0027] Some of the screw heads of the screws used to connect the connecting body 10 and the reducer 50 are located in the first countersunk hole 15, some of the screw heads of the screws used to connect the connecting body 10 and the reducer 50 are located in the second countersunk hole 121, some of the screw heads of the screws used to connect the motor 70 and the motor end cover 40 are located in the avoidance blind hole 122, and some of the screw heads of the screws used to connect the motor 70 and the motor end cover 40 are located in the avoidance hole 14. Through the above arrangement, it is possible to avoid the exposure of the bolts or screw heads of the existing connecting structure, reduce the assembly dimensions between the motor 70 and the reducer 50, thereby improving the structural compactness, aesthetics and space utilization of the connecting structure, and avoid interference between the connecting body 10 and the screw heads of the screws used to connect the motor 70 and the motor end cover 40.

[0028] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the connection structure also includes a first connecting member 20 and a second connecting member. The first connecting member 20 is constructed to be sequentially passed through the motor end cover 40 and the connecting hole 13, and the second connecting member is constructed to be sequentially passed through the first countersunk hole 15 and the reducer 50.

[0029] In this embodiment, the first connector 20 is sequentially provided through the motor end cover 40 and the connecting hole 13 to connect the motor end cover 40 and the connecting body 10 together, and the second connector is sequentially provided through the first countersunk hole 15 and the reducer 50 to connect the connecting body 10 and the reducer 50 together, thereby achieving the connection between the motor 70 and the reducer 50. As can be seen from the above, the connection between the motor 70 and the reducer 50 can be achieved by providing the connecting body 10 without changing the structure of the motor 70 and the reducer 50.

[0030] It should be noted that the motor end cover 40 and the motor 70 are fixedly connected by screws.

[0031] See also Figures 1 to 4As shown, in one embodiment of the present invention, the connection structure further includes a third connection member 60 , and the third connection member 60 is configured to pass through the second countersunk hole 121 and the reducer 50 in sequence.

[0032] Through the above arrangement, the connection between the connecting body 10 and the speed reducer 50 can be achieved.

[0033] In one embodiment of the present invention, the avoidance hole 14 is a blind hole or a through hole.

[0034] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the connecting body 10 is a circular ring structure, and the area surrounded by the inner circumference of the circular ring structure forms the first through hole 11 of the motor shaft.

[0035] In this embodiment, the connecting body 10 is a circular ring structure, which is convenient for manufacturing and processing. At the same time, the circular ring structure can also ensure the passage of the motor shaft 71 without the need for additional processing of a through hole.

[0036] See also Figures 1 to 4 As shown, in one embodiment of the present invention, a positioning hole 16 is further provided on the connecting body 10 .

[0037] In this embodiment, a corresponding protrusion is provided on the reducer 50. Before connecting the connecting body 10 with the reducer 50, the protrusion can be inserted into the positioning hole 16 to achieve positioning between the connecting body 10 and the reducer 50, which facilitates subsequent connection operations.

[0038] See also Figures 1 to 4 As shown, the utility model also provides an electric drive system, which includes: the above-mentioned connection structure; a motor 70, including a motor shaft 71; a motor end cover 40, the motor end cover 40 is connected to the first end of the motor 70, and the motor end cover 40 is connected to the connection body 10, and a second through hole of the motor shaft is provided on the motor end cover 40, and the second through hole of the motor shaft is corresponding to the first through hole 11 of the motor shaft, and the motor shaft 71 is sequentially passed through the second through hole of the motor shaft and the first through hole 11 of the motor shaft; and a reducer 50, the reducer 50 is connected to the connection body 10.

[0039] In this embodiment, the motor end cap 40 is connected to the first end of the motor 70, and the connecting body 10 is connected to both the motor end cap 40 and the reducer 50, thereby achieving the connection between the motor 70 and the reducer 50. The connection structure of the electric drive system has all the technical solutions and technical effects of the above-mentioned connection structure, and will not be repeated here.

[0040] See also Figures 1 to 4As shown, in one embodiment of the present invention, along the radial direction of the motor shaft 71 , the motor end cover 40 has a lateral protrusion 41 protruding from the outer circumference of the motor shaft 71 , and the first connecting member 20 is constructed to pass through the lateral protrusion 41 .

[0041] In this embodiment, the first connecting member 20 is sequentially provided with a lateral protrusion 41 and a connecting hole 13, which can realize the connection between the motor end cover 40 and the connecting body 10. Through the setting of the lateral protrusion 41, the connection between the motor end cover 40 and the connecting body 10 can be realized without changing the internal structure of the motor end cover 40.

[0042] See also Figures 1 to 4 As shown, in one embodiment of the present invention, a boss 42 is provided on the side of the motor end cover 40 facing away from the motor 70 , and the boss 42 is passed through the first through hole 11 of the motor shaft.

[0043] In this embodiment, before the connecting body 10 and the motor end cover 40 are connected, the connecting body 10 is sleeved on the boss 42 through the first through hole 11 of the motor shaft, so as to achieve positioning between the two.

[0044] See also Figures 1 to 4 As shown, in one embodiment of the present invention, the electric drive system further includes a fourth connecting member 80, which is sequentially passed through the motor end cover 40 and the motor 70, and the portion of the fourth connecting member 80 located on the side of the motor end cover 40 away from the motor 70 is entirely located in the avoidance hole 14 or the avoidance blind hole 122.

[0045] In this embodiment, the fourth connecting member 80 is sequentially passed through the motor end cover 40 and the motor 70 to connect the motor end cover 40 and the motor 70 together. The portion of the fourth connecting member 80 exposed on the side of the motor end cover 40 away from the motor 70 is entirely located in the avoidance hole 14 or the avoidance blind hole 122. This arrangement can not only improve the structural compactness of the electric drive system, but also avoid interference between the connecting body 10 and the fourth connecting member 80.

[0046] In one embodiment, the first connecting member 20 , the second connecting member, the third connecting member 60 , and the fourth connecting member 80 are all screws.

[0047] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: a connecting body is provided, and a connecting avoidance structure, a connecting hole, an avoidance hole and a first countersunk hole are provided on the connecting body, part of the screw heads of the screws used to connect the connecting body and the reducer are located in the first countersunk hole, part of the screw heads of the screws used to connect the connecting body and the reducer are located in the second countersunk hole, part of the screw heads of the screws used to connect the motor and the motor end cover are located in the avoidance blind hole, and part of the screw heads of the screws used to connect the motor and the motor end cover are located in the avoidance hole. Through the above-mentioned arrangement, it is possible to avoid the exposure of the bolts or screw heads of the existing connecting structure, reduce the assembly dimensions between the motor and the reducer, thereby improving the structural compactness, aesthetics and space utilization of the connecting structure, and avoid interference between the connecting body and the screw heads of the screws used to connect the motor and the motor end cover.

[0048] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A connection structure, characterized in that: include: A connecting body (10) has a first through hole (11) of a motor shaft. The connecting body (10) is provided with a connecting avoidance structure (12), a connecting hole (13), a avoidance hole (14) and a first countersunk hole (15) located on the periphery of the first through hole (11) of the motor shaft. The connecting avoidance structure (12), the connecting hole (13), the avoidance hole (14) and the first countersunk hole (15) are arranged at intervals along the circumference of the connecting body (10). The connecting avoidance structure (12) includes a second countersunk hole (121) and a avoidance blind hole (122). The second countersunk hole (121) and the avoidance blind hole (122) at least partially overlap.

2. The connection structure according to claim 1, characterized in that: The connection structure further comprises a first connection member (20) and a second connection member, wherein the first connection member (20) is configured to be sequentially passed through the motor end cover (40) and the connection hole (13), and the second connection member is configured to be sequentially passed through the first countersunk hole (15) and the reducer (50).

3. The connection structure according to claim 2, characterized in that: The connection structure further includes a third connection member (60), and the third connection member (60) is configured to be sequentially passed through the second countersunk hole (121) and the reducer (50).

4. The connection structure according to any one of claims 1 to 3, characterized in that: The avoidance hole (14) is a blind hole or a through hole.

5. The connection structure according to any one of claims 1 to 3, characterized in that: The connecting body (10) is a circular ring structure, and the area enclosed by the inner circumference of the circular ring structure forms the first through hole (11) of the motor shaft.

6. The connection structure according to any one of claims 1 to 3, characterized in that: The connecting body (10) is also provided with a positioning hole (16).

7. An electric drive system, characterized in that: include: The connection structure according to any one of claims 1 to 6; A motor (70) including a motor shaft (71); a motor end cover (40), the motor end cover (40) being connected to the first end of the motor (70), and the motor end cover (40) being connected to the connecting body (10), the motor end cover (40) being provided with a second motor shaft through hole, the second motor shaft through hole being provided corresponding to the first motor shaft through hole (11), and the motor shaft (71) being sequentially passed through the second motor shaft through hole and the first motor shaft through hole (11); and A reducer (50), the reducer (50) is connected to the connecting body (10).

8. The electric drive system according to claim 7, characterized in that: Along the radial direction of the motor shaft (71), the motor end cover (40) has a lateral protrusion (41) protruding from the outer peripheral surface of the motor shaft (71), and the first connecting member (20) is configured to penetrate the lateral protrusion (41).

9. The electric drive system according to claim 7, characterized in that: A boss (42) is provided on the side of the motor end cover (40) facing away from the motor (70), and the boss (42) is passed through the first through hole (11) of the motor shaft.

10. The electric drive system according to claim 7, characterized in that: The electric drive system further includes a fourth connecting member (80), the fourth connecting member (80) being sequentially passed through the motor end cover (40) and the motor (70), and a portion of the fourth connecting member (80) located on a side of the motor end cover (40) away from the motor (70) being entirely located within the avoidance hole (14) or the avoidance blind hole (122).

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