Motor end cover of electric vehicle

Abstract

The electric vehicle motor end cover comprises an end cover body installed at the opening end of a motor shell, the end cover body comprises an inner side part, a middle part, an outer side part and an outer side plate which are sequentially connected from inside to outside, the inner side part and the outer side part are each of a cylindrical structure, the middle part is of a horizontally-arranged double-layer annular structure, and the outer side plate is of a cylindrical structure. The diameter of the inner side part is equal to that of the outer side part, the diameter of the middle part is larger than that of the outer side part, a plurality of positioning holes are formed in the circumferential direction of the middle part, the positioning holes are connected with the opening end of the motor shell through external fasteners, and the wall thickness of the inner side part, the wall thickness of the outer side part and the wall thickness of the outer side plate are equal. And the wall thickness of the middle part is twice that of the inner side part. The motor end cover of the electric vehicle is simple in structure and reasonable in design, completely meets the assembly and use requirements of the existing electric vehicle, and can effectively protect parts in the motor from being influenced by the external environment.

Description

Technical Field

[0001] This utility model relates to the technical field of motor end caps, and in particular to an electric vehicle motor end cap. Background Technology

[0002] With the rapid development of the social economy, the electric vehicle industry has also experienced rapid growth. Electric vehicles have many components, and the motor end cover is one of the most important. The motor end cover is the cover for the motor housing, typically installed at both ends of the motor to fix and support the motor shaft. However, existing motor end covers have a flat side near the opening of the motor housing. Over time, this can easily lead to radial displacement, allowing dust and moisture to easily enter the motor housing. To improve this, a new type of motor end cover structure is urgently needed. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the existing technology, an electric vehicle motor end cover is provided, which has a simple structure, reasonable design, fully meets the assembly and use requirements of existing electric vehicles, and can effectively protect the internal components of the motor from the influence of the external environment.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an electric vehicle motor end cover, including an end cover body installed at the opening end of the motor housing. The end cover body is a cap-shaped structure with one side open. The end cover body includes an inner part, a middle part, an outer part, and an outer plate connected sequentially from the inside to the outside. The inner part is close to the opening end of the motor housing, the outer part is away from the opening end of the motor housing, the middle part is located between the inner part and the outer part, and the outer plate is disposed at the outer end face of the outer part. Both the inner part and the outer part are cylindrical structures, and the middle part is a horizontally arranged double-layered annular structure. The diameter of the inner part is equal to that of the outer part. The diameter of the middle portion is larger than that of the outer portion. Several positioning holes are formed along the circumference of the middle portion. The positioning holes are connected to the opening end of the motor housing by means of external fasteners. The wall thickness of the inner portion, the wall thickness of the outer portion, and the wall thickness of the outer plate are equal. The wall thickness of the middle portion is twice that of the inner portion. In the middle portion, which is arranged in a horizontal double-layer annular structure, the layer closer to the inner portion is designated as the inner layer, and the layer closer to the outer portion is designated as the outer layer. The ends of the inner layer and the outer layer that are closer to the axis of the end cap body are not connected to each other, while the ends of the inner layer and the outer layer that are farther away from the axis of the end cap body are connected to each other.

[0005] Further, in the technical scheme, the depth dimension of the inner side portion is smaller than the depth dimension of the outer side portion, and the depth dimension of the middle portion is smaller than the depth dimension of the inner side portion.

[0006] Further, in the technical scheme, the inner side portion, the middle portion, the outer side portion and the outer side plate are integrally formed.

[0007] Further, in the technical scheme, the connection between the inner side portion and the middle portion is smoothly transitioned and provided with a first chamfer.

[0008] Further, in the technical scheme, the connection between the middle portion and the outer side portion is smoothly transitioned and provided with a second chamfer.

[0009] Further, in the technical scheme, the connection between the outer side portion and the bottom plate is smoothly transitioned and provided with a third chamfer.

[0010] Further, in the technical scheme, a bearing hole is formed at the middle position of the bottom plate.

[0011] Further, in the technical scheme, a plurality of reinforcing ribs are further arranged along the circumferential direction of the bottom plate.

[0012] The electric vehicle motor end cover has the advantages that: the electric vehicle motor end cover has simple structure and reasonable design, can fully meet the assembly and use requirements of the existing electric vehicle, can effectively protect the internal parts of the motor from the influence of the external environment, can provide support and fixation for the rotor and bearing of the motor, can keep the stator and rotor at a certain gap and stably rotate, can help heat dissipation of the motor, can keep the temperature of the motor stable, and can prevent overheating. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0014] Figure 1 is a structure diagram of the present application Figure One ;

[0015] Figure 2 is a structure diagram of the present application Figure Two ;

[0016] Figure 3 is a sectional view of the present application.

[0017] Fig. label: 1, inner side portion; 2, middle portion; 3, outer side portion; 4, outer side plate; 5, positioning hole; 6, first chamfer; 7, second chamfer; 8, third chamfer; 9, bearing hole; 10, reinforcing rib. DETAILED DESCRIPTION

[0018] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] As shown in Figure 1 , Figure 2 and Figure 3 , the utility model discloses an electric motor end cover of electric vehicle, including the end cover body of installing in the open end of motor casing, the end cover body is the cap -like structure of one side open, the end cover body includes the inner side portion 1, middle portion 2, outer side portion 3 and outer side plate 4 connected in order from inside to outside, the inner side portion 1 is close to the open end of motor casing, the outer side portion 3 is away from the open end of motor casing, the middle portion 2 is located between the inner side portion 1 and the outer side portion 3, the outer side plate 4 is arranged at the outer end surface of the outer side portion 3, the inner side portion 1 and the outer side portion 3 are cylindrical structure, the middle portion 2 is horizontally arranged double -layered ring structure, the diameter of the inner side portion 1 is equal to the diameter of the outer side portion 3, the diameter of the middle portion 2 is greater than the diameter of the outer side portion 3, a plurality of positioning holes 5 are set along the circumferential direction of the middle portion 2, the positioning hole 5 is connected with the open end of motor casing by external fastener, the wall thickness of the inner side portion 1, the wall thickness of the outer side portion 3 and the wall thickness of the outer side plate 4 are equal, the wall thickness of the middle portion 2 is twice the wall thickness of the inner side portion 1, in the middle portion 2 of horizontally arranged double -layered ring structure, the layer close to the inner side portion 1 is defined as the inner layer, and the layer close to the outer side portion 3 is defined as the outer layer, the end close to the axis of the end cover body in the inner layer and the outer layer is not connected with each other, and the end away from the axis of the end cover body in the inner layer and the outer layer is connected with each other.

[0020] Among them, the inner side portion 1 extends into the open end of motor casing, and the outer circle of the inner side portion 1 is tightly matched with the inner circle of the open end of motor casing, which not only can realize the radial positioning of the electric motor end cover of electric vehicle, but also can avoid the intrusion of external dust, moisture and the like into the motor interior.

[0021] The depth dimension of the inner side portion 1 is less than that of the outer side portion 3, and the depth dimension of the middle portion 2 is less than that of the inner side portion 1, which is designed to meet the existing electric vehicle assembly and use requirements. The inner side portion 1, the middle portion 2, the outer side portion 3 and the outer plate 4 are integrally formed, and the integrally formed structure improves the overall structural strength and service life of the electric vehicle motor end cover. The connection between the inner side portion 1 and the middle portion 2 is smoothly transitioned and provided with a first chamfer 6, which improves the structural strength of the connection between the inner side portion 1 and the middle portion 2 and avoids stress. The connection between the middle portion 2 and the outer side portion 3 is smoothly transitioned and provided with a second chamfer 7, which improves the structural strength of the connection between the middle portion 2 and the outer side portion 3 and avoids stress. The connection between the outer side portion 3 and the bottom plate 5 is smoothly transitioned and provided with a third chamfer 8, which improves the structural strength of the connection between the outer side portion 3 and the bottom plate 5 and avoids stress. The middle position of the bottom plate 5 is provided with a bearing hole 9, which is designed to facilitate cooperation with the motor shaft. A plurality of reinforcing ribs 10 are arranged along the circumferential direction of the bottom plate 5, which improves the overall structural strength of the electric vehicle motor end cover.

[0022] The electric vehicle motor end cover has the advantages of simple structure, reasonable design, complete satisfaction of existing electric vehicle assembly and use requirements, effective protection of internal parts of the motor from external environment such as dust, humidity, corrosion and physical damage, support and fixation of the rotor and the bearing of the motor, maintenance of a certain gap of the stator and the rotor and stable operation of them, heat dissipation of the motor, temperature stability of the motor and prevention of overheating.

[0023] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. An electric vehicle motor end shield characterized by: The end cover body is installed on the open end of the motor shell, and has a one-side open cap structure, which comprises an inner side part (1), an intermediate part (2), an outer side part (3) and an outer side plate (4) connected in sequence from inside to outside. The inner side part (1) is close to the open end of the motor shell, the outer side part (3) is away from the open end of the motor shell, the intermediate part (2) is between the inner side part (1) and the outer side part (3), and the outer side plate (4) is arranged at the outer end face of the outer side part (3). The inner side part (1) and the outer side part (3) are in cylindrical structures, the intermediate part (2) is in a horizontally arranged double-layer circular ring structure, the diameter of the inner side part (1) is equal to the diameter of the outer side part (3), the diameter of the intermediate part (2) is greater than the diameter of the outer side part (3), a plurality of positioning holes (5) are arranged along the circumferential direction of the intermediate part (2), the positioning holes (5) are connected with the open end of the motor shell by external fasteners, the wall thickness of the inner side part (1), the wall thickness of the outer side part (3) and the wall thickness of the outer side plate (4) are equal, and the wall thickness of the intermediate part (2) is twice the wall thickness of the inner side part (1). In the horizontally arranged double-layer circular ring structure of the intermediate part (2), one layer close to the inner side part (1) is defined as an inner layer, and one layer close to the outer side part (3) is defined as an outer layer. One end close to the axis of the end cover body of the inner layer and the outer layer is not connected with each other, and one end away from the axis of the end cover body of the inner layer and the outer layer is connected with each other.

2. The electric vehicle motor end shield of claim 1, wherein: The depth size of the inner side part (1) is less than the depth size of the outer side part (3), and the depth size of the intermediate part (2) is less than the depth size of the inner side part (1).

3. The electric vehicle motor end shield of claim 1, wherein: The inner side part (1), the intermediate part (2), the outer side part (3) and the outer side plate (4) are in an integral molding structure.

4. The electric vehicle motor end shield of claim 1, wherein: A first chamfer (6) is arranged at the smooth transition of the connection between the inner side part (1) and the intermediate part (2).

5. The electric vehicle motor end shield of claim 1, wherein: A second chamfer (7) is arranged at the smooth transition of the connection between the intermediate part (2) and the outer side part (3).

6. The electric vehicle motor end shield of claim 1, wherein: A third chamfer (8) is arranged at the smooth transition of the connection between the outer side part (3) and the bottom plate (5).

7. The electric vehicle motor end shield of claim 1, wherein: A bearing hole (9) is arranged at the middle position of the bottom plate (5).

8. The electric vehicle motor end shield of claim 1, wherein: A plurality of reinforcing ribs (10) are arranged along the circumferential direction of the bottom plate (5).

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