Multifunctional motor end cover for electric motorcycle

Abstract

The utility model discloses a multifunctional motor end cover for an electric motorcycle, which comprises heat dissipation teeth which are arranged on the outer surface of an end cover body at equal intervals and are consistent with the advancing direction of the electric motorcycle so as to improve the heat dissipation efficiency. The lower end face of the end cover body is subjected to profiling design based on space distribution of the heating elements, uniform heat conduction gaps are formed between the lower end face and the tops of the heating elements, and the heat conduction gaps are filled with high-heat-conductivity media to achieve directional heat conduction. A plurality of heating elements are integrated on the highly integrated PCB, so that the whole motor end cover is more compact in structure; the installation tolerance of the threaded holes, the heat dissipation teeth and the highly-integrated PCB is strictly controlled, and accurate matching and installation convenience between components are ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric motorcycle motor structure, specifically relating to a multi-functional motor end cover for electric motorcycles. Background Technology

[0002] Existing electric motorcycle motor end caps generally suffer from the following problems: insufficient heat dissipation design leads to excessive temperature rise of internal components, requiring additional heat sinks, increasing cost and space occupation, and hindering the miniaturization and weight reduction of electric motorcycles; complex electrical connection structures result in low installation efficiency; uneven heat conduction between heating elements and the end cap poses a risk of localized overheating, which may lead to component damage or performance degradation; and potentially large machining tolerances between components result in installation difficulties or loose fits, affecting product stability and reliability. To address these issues, this invention proposes a multifunctional end cap integrating heat dissipation teeth, fixing holes, and a heat-conducting structure, eliminating the need for a separate heat sink, significantly reducing costs and improving integration. Summary of the Invention

[0003] The purpose of this utility model is to provide a multifunctional motor end cover for electric motorcycles to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multifunctional motor end cover for an electric motorcycle, comprising an end cover body, wherein a plurality of heat dissipation teeth are provided at equal intervals on the outer surface of the end cover body, and the direction of the heat dissipation teeth is consistent with the forward direction of the electric motorcycle;

[0005] The end cap body has multiple threaded holes, and a highly integrated PCB board is provided inside the end cap body. Various heating elements are integrated on the highly integrated PCB board. The heating elements include insulated gate bipolar transistors (IGBTs), resistors, and chips. The lower end face of the end cap body is designed based on the spatial distribution of the heating elements, so that a uniform thermally conductive gap is formed between the lower end face of the end cap body and the top of each heating element. The gap is filled with a high thermal conductivity medium to achieve directional heat conduction.

[0006] Preferably, the dimensional consistency tolerance of the thermally conductive gap is ≤ ±0.1 mm.

[0007] Preferably, the spacing between the heat dissipation teeth is 4-6 mm and the height is 5-10 mm.

[0008] Preferably, the end cap body 1 is provided with five threaded holes, which are symmetrically distributed at the positions of the motor output end and the positive and negative ends of the battery, with a hole diameter tolerance of ±0.1mm.

[0009] Preferably, the high thermal conductivity medium is a silicone thermal pad, and the thickness of the silicone thermal pad is 1-2 mm.

[0010] Preferably, the highly integrated PCB board is fixed to the inner wall of the end cover by screws, and the gap tolerance between the board and the end cover is ≤0.2mm.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. High-efficiency heat dissipation: By evenly spaced heat dissipation denticles aligned with the forward direction of the electric motorcycle on the outer surface of the end cover, the heat dissipation area is effectively increased, improving heat dissipation efficiency. This design not only helps to quickly dissipate the heat generated during motor operation but also optimizes aerodynamic performance, reduces wind resistance, and further enhances the overall performance of the electric motorcycle.

[0013] 2. Directional Heat Conduction and Uniform Heat Dissipation: The lower end face of the end cover is designed to mimic the spatial distribution of the heating elements, forming a uniform thermally conductive gap between it and the top of each heating element, filled with a high thermal conductivity medium (such as a silicone thermal pad). This design ensures that heat can be quickly and evenly transferred to the end cover through the thermally conductive medium, achieving directional heat conduction, effectively avoiding localized overheating, and extending the service life of the motor and heating elements.

[0014] 3. High integration and compact structure: The heat dissipation fins and end cover are integrally molded. The highly integrated PCB board integrates a variety of heat-generating components, making the entire motor end cover structure more compact, reducing costs by more than 20%, and increasing space utilization by 30%.

[0015] 4. Precise machining and convenient installation: The installation tolerances of threaded holes, heat dissipation teeth, and highly integrated PCB boards are strictly controlled (such as the consistency tolerance of thermal conduction gap size ≤ ±0.1mm, the setting of heat dissipation tooth spacing and height range, the tolerance of threaded hole diameter ±0.1mm, etc.), ensuring the precise fit between components and the convenience of installation, and improving the overall quality and stability of the product. Attached Figure Description

[0016] Figure 1 This is an exploded view of the structure of this utility model.

[0017] In the diagram: End cap body-1, heat dissipation teeth-2, threaded hole-3, highly integrated PCB board-4, heating element-5. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 This invention illustrates a specific embodiment of a multifunctional motor end cover for an electric motorcycle: the end cover body 1 serves as the foundation of the entire structure, and its outer surface is provided with multiple heat dissipation teeth 2 at equal intervals. These heat dissipation teeth 2 not only increase the heat dissipation area, but also have their direction consistent with the forward direction of the electric motorcycle, which helps to optimize aerodynamic performance, reduce wind resistance, and improve heat dissipation efficiency. In this embodiment, the spacing of the heat dissipation teeth 2 is set to 4-6mm and the height is 5-10mm. This design ensures the heat dissipation effect while also ensuring the overall strength and aesthetics of the end cover.

[0020] On the end cover body 1, there are also five threaded holes 3. These threaded holes 3 are symmetrically distributed according to the position of the motor output end. This not only facilitates the installation and fixing of the motor, but also allows the three-phase copper busbars on the board to be directly locked to the three-phase output of the motor with screws. In addition, the positive and negative copper busbars on the board are fixed together with the socket to realize the overall connection of the electrical control. In this embodiment, the hole diameter tolerance of the threaded holes is strictly controlled within ±0.1mm to ensure the accuracy and stability of the installation.

[0021] Inside the end cover body 1, there is a highly integrated PCB board 4, which integrates various heat-generating components 5, including insulated gate bipolar transistors (IGBTs), resistors, and chips. These heat-generating components generate a large amount of heat during motor operation. Therefore, in this embodiment, the lower end face of the end cover body 1 is designed to form a uniform thermally conductive gap between it and the top of each heat-generating component 5. These thermally conductive gaps are filled with high thermal conductivity silicone thermal pads with a thickness of 1-2 mm. This design ensures that heat can be quickly and evenly transferred to the end cover through the thermal medium, achieving directional heat conduction, effectively avoiding local overheating, and extending the service life of the motor and heat-generating components.

[0022] In addition, in this embodiment, the highly integrated PCB board 4 is fixed to the inner wall of the end cover with screws, and the gap tolerance between it and the end cover is strictly controlled within ≤0.2mm. This design not only ensures the stability and reliability of the PCB board, but also facilitates later maintenance and replacement.

[0023] In summary, the multi-functional motor end cap for electric motorcycles provided in this embodiment has advantages such as high-efficiency heat dissipation, directional heat conduction and uniform heat dissipation, high integration and compact structure, as well as precise machining and convenient installation. Compared with the prior art, the end cap of this embodiment does not require an additional heat sink, significantly reducing costs and improving integration; at the same time, through precise machining and tolerance control, it ensures precise fit between components and ease of installation, improving the overall quality and stability of the product.

[0024] The applicant further declares that while the above embodiments illustrate the implementation method and apparatus structure of this utility model, this utility model is not limited to the above-described embodiments, meaning that this utility model must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions for the selected implementation methods, additions of steps, and selection of specific methods all fall within the protection and disclosure scope of this utility model.

[0025] This utility model is not limited to the above-described embodiments. All methods that use similar structures and methods to achieve the purpose of this utility model are within the protection scope of this utility model.

Claims

1. A multifunctional motor end cover for electric motorcycles, comprising an end cover body (1), characterized in that: Multiple heat dissipation teeth (2) are provided at equal intervals on the outer surface of the end cap body (1), and the direction of the heat dissipation teeth (2) is consistent with the forward direction of the electric motorcycle; Multiple threaded holes (3) are provided on the end cap body (1). A highly integrated PCB board (4) is provided inside the end cap body (1). Multiple heating elements (5) are integrated on the highly integrated PCB board (4). The heating elements (5) include insulated gate bipolar transistors (IGBTs), resistors, and chips. The lower end face of the end cap body (1) is designed based on the spatial distribution of the heating elements (5) to form a uniform thermally conductive gap between the lower end face of the end cap body (1) and the top of each heating element (5). The gap is filled with a high thermal conductivity medium to achieve directional heat conduction.

2. The multifunctional motor end cover for electric motorcycle according to claim 1, characterized in that: The dimensional consistency tolerance of the thermally conductive gap is ≤ ±0.1 mm.

3. The multifunctional motor end cover for electric motorcycle according to claim 1, characterized in that: The spacing between the heat dissipation teeth (2) is 4-6 mm, and the height is 5-10 mm.

4. The multifunctional motor end cover for electric motorcycle of claim 1, wherein: Five threaded holes (3) are provided on the end cap body (1). The five threaded holes (3) are distributed according to the position of the motor output end and the positive and negative ends of the battery, with a hole diameter tolerance of ±0.1mm.

5. The multifunctional motor end cover for electric motorcycle of claim 1, wherein: The high thermal conductivity medium is a silicone thermal pad, and the thickness of the silicone thermal pad is 1-2 mm.

6. The multifunctional motor end cover for electric motorcycle of claim 1, wherein: The highly integrated PCB board (4) is fixed to the inner wall of the end cover by screws, and the gap tolerance between the board and the end cover is ≤0.2mm.

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