Efficient hub motor structure

Abstract

The utility model discloses an efficient hub motor structure, which relates to the technical field of electric bicycles and comprises a motor shell, an end cover is mounted on one side of the motor shell, a disc brake disc is arranged on the periphery of the end cover and fixedly mounted on the motor shell, and the inner diameter of the disc brake disc is larger than or equal to the outer diameter of the end cover. According to the utility model, the installation position of a traditional disc brake disc is moved from the end cover of the hub motor to the shell of the hub, so that the space from the end cover of the hub motor to a frame is utilized by an internal motor, and the axial space in the hub motor is greatly increased; the increase of the axial space in the hub motor creates conditions for the increase of the motor stator and rotor stack height, so that the efficiency and torque of the motor are increased, the heating of the motor is reduced, and the motor can be ridden for a longer distance under the condition of the same battery capacity; and meanwhile, motor temperature protection caused by heating of the motor during long-time uphill or high-power riding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycles, in particular to a high-efficiency hub motor structure. Background Art

[0002] Due to the advantages of environmental protection, safety, lightness, etc., electric bicycles have become increasingly popular among sports enthusiasts around the world. As the core component of electric bicycles, the disc brake hub motor has always been the mainstream of hub motors. However, the installation position of the hub motor on the bicycle has a narrow space, and since there must be a certain distance between the disc brake disc of the bicycle and the frame, the axial space of the motor is restricted, which limits the improvement of the performance of the hub motor. The utility model proposes a high-efficiency hub motor structure to solve the problems mentioned in the above background art. Content of the Utility Model

[0003] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a high-efficiency hub motor structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high-efficiency hub motor structure includes a motor housing. One side of the motor housing is provided with an end cover, and a disc brake disc is arranged outside the end cover. The disc brake disc is fixedly installed on the motor housing. When the disc brake disc is moved to the motor housing, the space between the end cover and the frame is released.

[0006] Preferably, the inner diameter of the disc brake disc is greater than or equal to the outer diameter of the end cover, ensuring that the disc brake disc can completely cover the area around the end cover and will not interfere with the function of the end cover.

[0007] Preferably, a plurality of mounting convex surfaces are arranged on one side of the motor housing, and a plurality of protruding parts corresponding to the mounting convex surfaces are arranged on the inner circle of the disc brake disc, which helps to stabilize the braking system and reduce the error caused by the friction between the brake disc and the motor housing.

[0008] Preferably, a plurality of fixing screws are arranged between the motor housing and the disc brake disc. The plurality of fixing screws are located at the positions of the mounting convex surfaces. By cooperating the mounting convex surfaces with the inner circle protruding parts of the disc brake disc and installing with the fixing screws, it can ensure that the disc brake disc is firmly fixed on the motor housing.

[0009] Preferably, mounting screw holes corresponding to the fixing screws are provided on both the mounting convex surfaces and the inner circle protruding parts of the disc brake disc. The mounting convex surfaces and the inner circle protruding parts of the disc brake disc are both provided with mounting screw holes, which can accurately position and fix the fixing screws, ensuring the stability of the disc brake disc and the normal operation of the motor.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The present utility model moves the installation position of the traditional disc brake disc from the inner upper part of the hub motor end cover to the outer shell of the hub, increasing the axial space from the hub motor end cover to the frame, which can be utilized by the internal motor. As a result, the axial space inside the hub motor is significantly increased. The increased axial space inside the hub motor creates conditions for increasing the stack height of the motor stator and rotor, enabling an increase in the efficiency and torque of the motor. The shortening of the distance between the disc brake disc and the fixed position allows the heat generated by the disc brake disc during braking to be quickly dissipated through the motor housing. The increase in the stack height of the motor stator and rotor also reduces the heat generation of the motor, enabling a longer riding distance under the condition of the same battery capacity and avoiding motor temperature protection caused by motor heating during long-term riding of electric bicycles or when going uphill at high power. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic installation structure diagram of an efficient hub motor structure proposed by the present utility model;

[0013] Figure 2 is a schematic diagram of the motor structure of an efficient hub motor structure proposed by the present utility model. In the figure: 1, motor housing; 2, disc brake disc; 3, fixing screw; 4, end cover; 5, mounting convex surface; 6, mounting screw hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0015] Referring to Figure 1-2 , an efficient hub motor structure includes a motor housing 1. One side of the motor housing 1 is provided with an end cover 4. A disc brake disc 2 is arranged around the end cover 4. The disc brake disc 2 is fixedly installed on the motor housing 1. The inner diameter of the disc brake disc 2 is greater than or equal to the outer diameter of the end cover 4 to ensure that the disc brake disc 2 can completely cover the area around the end cover 4 without interfering with the function of the end cover 4. Since the disc brake disc 2 is installed externally, it can effectively perform heat exchange, reduce the heat generation of the motor, and the increased axial space can also help better dissipate heat. Moving the position of the disc brake disc 2 can increase the axial space inside the motor, thereby allowing the stack height of the motor stator and rotor to increase, which helps improve the power density and efficiency of the motor;

[0016] Furthermore, several mounting convex surfaces 5 are provided on one side of the motor housing 1, and the disc brake disc 2 is correspondingly mounted on several protruding parts of the convex surface 5, which helps to stabilize the braking system, accelerate the heat dissipation of the disc brake disc, and reduce the error caused by the friction between the brake disc 2 and the motor housing 1. Several fixing screws 3 are provided between the motor housing 1 and the disc brake disc 2. The several fixing screws 3 are located at the position of the mounting convex surface 5. By cooperating with the inner ring protruding part of the disc brake disc 2 through the mounting convex surface 5 and installing with the fixing screws 3, it can ensure that the disc brake disc 2 is firmly fixed on the motor housing 1. Fixing the disc brake disc 2 on the motor housing 1 instead of the end cover 4 can improve the structural stability and durability, improve the heat dissipation performance of the disc brake disc, and the end cover 4 can focus on protecting the interior of the motor, while the fixing of the disc brake disc 2 is not affected by the end cover 4, and the design of the motor housing 1 can optimize the heat dissipation performance;

[0017] Furthermore, mounting screw holes 6 corresponding to the fixing screws 3 are provided on both the mounting convex surface 5 and the inner ring protruding part of the disc brake disc 2. The mounting screw holes 6 are provided on both the mounting convex surface 5 and the inner ring protruding part of the disc brake disc 2, which can accurately position and fix the fixing screws 3, ensure the stability of the disc brake disc and the normal operation of the motor. The disc brake disc 2 is fixed on the motor housing 1 through the mounting convex surface 5 to ensure the stability of the braking system. The protruding mounting parts and screw hole design can effectively prevent the disc brake disc 2 from loosening or shifting in position, improve the efficiency of the motor and reduce heat generation, and reduce the temperature protection mechanism started due to overheating of the motor, thereby ensuring the reliability of the motor during long-term high-load operation;

[0018] Furthermore, the specific installation process is as follows: Ensure that the motor housing 1, end cover 4, disc brake disc 2, mounting convex surface 5, fixing screws 3 and all mounting screw holes 6 are in a clean state to avoid dust or impurities affecting the installation quality. Align the disc brake disc 2 with the mounting convex surface 5 on the motor housing 1. Since the inner diameter of the disc brake disc 2 is greater than or equal to the outer diameter of the end cover 4, the position of the mounting convex surface 5 should be accurately aligned with the inner ring of the disc brake disc 2. Screw the fixing screws 3 through the mounting screw holes 6 of the disc brake disc 2 into the corresponding mounting screw holes 6 of the motor housing 1. The screws should be tightened evenly to ensure that the disc brake disc 2 is firmly fixed on the motor housing 1. After the installation is completed, check whether the disc brake disc 2 is firmly installed without shaking.

[0019] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An efficient hub motor structure, including a motor housing (1), characterized in that, One side of the motor housing (1) is equipped with an end cover (4). A disc brake disc (2) is arranged around the end cover (4), and the disc brake disc (2) is fixedly installed on the motor housing (1).

2. The high-efficiency hub motor structure according to claim 1, characterized in that The inner diameter of the disc brake disc (2) is greater than or equal to the outer diameter of the end cover (4).

3. The high-efficiency hub motor structure according to claim 1, characterized in that A number of mounting convex surfaces (5) are provided on one side of the motor housing (1), and a number of protruding parts corresponding to the mounting convex surfaces (5) are provided on the inner ring of the disc brake disc (2).

4. The high-efficiency hub motor structure according to claim 1, characterized in that, A number of fixing screws (3) are arranged between the motor housing (1) and the disc brake disc (2), and the number of fixing screws (3) is located at the corresponding positions of the mounting convex surfaces (5).

5. The efficient hub motor structure according to claim 3, characterized in that Mounting screw holes (6) corresponding to the fixing screws (3) are provided on both the mounting convex surfaces (5) and the protruding parts on the inner ring of the disc brake disc (2).

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