Motor rotor output structure

Abstract

The utility model discloses a motor rotor output structure, which comprises a motor rotor main body and an output shaft, the output shaft is provided with an output gear and a spline, the motor rotor main body is provided with a rotating shaft hole, the spline is matched with the rotating shaft hole, and the output shaft and the output gear are integrally formed. According to the gear shaft, the output shaft and the output gear are integrally formed, so that the transmission strength of the gear shaft can be effectively improved after the gear shaft is used for a long time.

Description

Technical Field

[0001] This utility model relates to hub motors, and more particularly to a motor rotor output structure. Background Technology

[0002] Hub motors are an important component of the power and transmission systems of electric bicycles. However, at present, the output shaft and output gear of hub motors are mostly connected separately to form a gear shaft. This connection method will cause the transmission strength of the gear shaft to decrease after long-term use, so it needs to be improved. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies, such as the decrease in transmission strength of gear shafts after prolonged use, by providing a new motor rotor output structure.

[0004] To solve the above-mentioned technical problems, this utility model achieves this through the following technical solution:

[0005] An electric motor rotor output structure includes an electric motor rotor body and an output shaft. The output shaft is provided with an output gear and a spline. The electric motor rotor body has a shaft hole, and the spline cooperates with the shaft hole. The output shaft and the output gear are integrally formed.

[0006] This invention improves the transmission strength of the gear shaft under long-term use by integrally molding the output shaft and output gear.

[0007] Preferably, the above-described motor rotor output structure further includes at least three positioning bearings, and a first mounting area is provided between the spline and the output gear, wherein one of the positioning bearings is mounted in the first mounting area.

[0008] The first installation area facilitates the installation or removal of the positioning bearing.

[0009] Preferably, in the above-described motor rotor output structure, the output shaft is provided with a second mounting area at the front end of the spline, and the other two positioning bearings are mounted on the second mounting area.

[0010] The second installation area facilitates the installation or removal of the positioning bearing.

[0011] As a preferred embodiment, in the above-described motor rotor output structure, the motor rotor body includes a rotor housing and a magnet, the magnet being attached to the rotor housing and being arc-shaped.

[0012] Curved magnets can improve the fit between the magnet and the rotor housing.

[0013] As a preferred embodiment, in the above-described motor rotor output structure, the rotor housing is further provided with heat dissipation holes in the circumferential direction.

[0014] The design of heat dissipation holes can reduce the weight of the rotor housing and improve the heat dissipation performance of the motor rotor body. Attached Figure Description

[0015] Figure 1 This is an exploded structural diagram of the motor rotor body of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the motor rotor body of this utility model;

[0017] Figure 3 This is a longitudinal section diagram of the main body of the motor rotor of this utility model.

[0018] Reference numerals: 1. Motor rotor body; 2. Output shaft; 21. Output gear; 22. Spline; 11. Shaft hole; 3. Positioning bearing; 4. First mounting area; 5. Second mounting area; 12. Rotor housing; 13. Magnet; 121. Heat dissipation hole. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-3 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention:

[0020] Example 1

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, a motor rotor output structure includes a motor rotor body 1 and an output shaft 2. The output shaft 2 is provided with an output gear 21 and a spline 22. The motor rotor body 1 is provided with a shaft hole 11. The spline 22 cooperates with the shaft hole 11. The output shaft 2 and the output gear 21 are integrally formed.

[0022] Specifically, the spline 22 of the output shaft 2 and the shaft hole 11 are interference fit to ensure that the fit between the output shaft 2 and the shaft hole 11 will not become loose.

[0023] Preferably, it also includes at least three positioning bearings 3, and a first mounting area 4 is provided between the spline 22 and the output gear 21, wherein one of the positioning bearings 3 is mounted in the first mounting area 4.

[0024] Preferably, the output shaft 2 is provided with a second mounting area 5 at the front end of the spline 22, and the other two positioning bearings 3 are mounted on the second mounting area 5.

[0025] More specifically, the positioning bearing 3 is used to cooperate with the motor rotor body 1 in mounting and positioning on other housings of the motor, and multiple coaxial positioning bearings 3 can provide effective positioning support.

[0026] Preferably, the motor rotor body 1 includes a rotor housing 12 and a magnet 13, the magnet 13 being attached to the rotor housing 12 and the magnet 13 being arc-shaped.

[0027] Preferably, the rotor housing 12 is also provided with heat dissipation holes 121 in the circumferential direction.

[0028] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A motor rotor output structure, comprising a motor rotor body (1), characterized in that: It also includes an output shaft (2), on which an output gear (21) and a spline (22) are provided. The motor rotor body (1) has a shaft hole (11) and the spline (22) cooperates with the shaft hole (11). The output shaft (2) and the output gear (21) are integrally formed.

2. The motor rotor output structure according to claim 1, characterized in that: It also includes at least three positioning bearings (3), and a first mounting area (4) is provided between the spline (22) and the output gear (21), wherein one of the positioning bearings (3) is mounted in the first mounting area (4).

3. The motor rotor output structure according to claim 2, characterized in that: The output shaft (2) is located at the front end of the spline (22) and has a second mounting area (5). The other two positioning bearings (3) are mounted on the second mounting area (5).

4. The motor rotor output structure according to claim 1, characterized in that: The motor rotor body (1) includes a rotor shell (12) and a magnet (13). The magnet (13) is attached to the rotor shell (12) and is arc-shaped.

5. The motor rotor output structure according to claim 4, characterized in that: The rotor housing (12) is also provided with heat dissipation holes (121) in the circumferential direction.

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