Support structure of outer rotor direct current brushless motor
By designing a brushless DC motor bracket structure with different mounting holes, the problems of low versatility and high production cost in the prior art are solved, and installations suitable for different bearing types are realized, and production costs are reduced.
Patent Information
- Application Number
- CN202421552489.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The bracket structure of existing DC brushless motors needs to be replaced when installing different types of bearings, resulting in low versatility of the bracket and increasing production costs.
A support structure of an outer rotor DC brushless motor is designed, including a frame body and a mounting column. The mounting column is equipped with mounting holes of different apertures, which are suitable for the installation of rolling bearings and sliding bearings respectively.
With this design, a bracket can be suitable for two different types of bearing installations, improving the versatility of the bracket and reducing production costs.
Smart Images
Figure CN222996325U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to an important part of a motor, in particular to a bracket structure of an outer-rotor DC brushless motor. Background Art
[0002] When the existing DC brushless motor is installed, a shaft bearing is installed at the mating part of the rotating shaft and the mounting bracket, and the bearing avoids the wear of the bracket caused by the rotation of the rotating shaft. However, in the actual use process, according to different use requirements, some motors need to install rolling bearings, and some motors need to install sliding bearings; therefore, in order to facilitate the installation of different bearings, the corresponding mounting brackets need to be replaced, so the versatility of the brackets is not high, and corresponding molds need to be opened for different types, which increases the production cost. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a bracket structure of an outer-rotor DC brushless motor that can solve at least one of the above problems.
[0004] According to one aspect of the utility model, there is provided a bracket structure of an outer-rotor DC brushless motor, including a frame body, on which there are mounting columns, and on the mounting columns there are successively a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are connected, the first mounting hole is located at one end of the second mounting hole, and the aperture of the second mounting hole is smaller than that of the first mounting hole.
[0005] The beneficial effect of the utility model is that: by providing the first mounting hole and the second mounting hole with different apertures, therefore, when installing the bearing on the motor rotating shaft, different mounting holes are selected for installation according to the type of the bearing; by providing the first mounting hole, it is convenient to install the rolling bearing; by providing the second mounting hole, it is convenient to install the sliding bearing. Thus, the installation requirements of different bearings are met, the versatility is improved, and one bracket can be used for the installation of two different types of bearings, which is beneficial to reducing the production cost.
[0006] In some embodiments, there is also a third mounting hole on the mounting column, the third mounting hole is located at the other end of the second mounting hole, the aperture of the third mounting hole is the same as that of the first mounting hole, and the third mounting hole is connected to the second mounting hole. Thus, by providing the third mounting hole, it is convenient to install the rolling bearing and convenient to sleeved two rolling bearings on the motor rotating shaft.
[0007] In some embodiments, the mounting column and the frame body are of an integrally formed structure. Thus, it is convenient for the forming and processing of the whole frame body.
[0008] In some embodiments, there are a plurality of supporting feet on the outer periphery of the frame body, and fixing holes are provided at the ends of the respective supporting feet away from the mounting column. Thus, by providing a plurality of supporting feet and fixing holes, it is convenient to fix the bracket during installation.
[0009] In some embodiments, an installation groove is provided on one side of the frame body. Thus, by providing the installation groove, it is convenient to install external circuit boards and other structures on the installation groove, reserving sufficient installation positions.
[0010] In some embodiments, a plurality of limiting blocks are provided on the outer periphery of the installation column. Thus, by providing the limiting blocks, it is convenient to position and install the external stator structure and facilitate the cooperation with the stator structure.
[0011] In some embodiments, the limiting block and the installation column are of an integrally formed structure. Thus, it is convenient for the forming process of the limiting block.
[0012] In some embodiments, reinforcing ribs are provided on the frame body, and the reinforcing ribs and the frame body are of an integrally formed structure. Thus, by providing the reinforcing ribs, the strength of the frame body can be increased.
[0013] In some embodiments, a U-shaped groove is provided on one side of the frame body, and the U-shaped groove is located on one side of the installation groove. Thus, by providing the U-shaped groove, it is convenient to lead out the wiring of the corresponding structure in the installation groove.
[0014] In some embodiments, a wire outlet hole is provided on the frame body. Thus, it is convenient to conduct wiring through the wire outlet hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic structural diagram of the bracket structure of the outer-rotor DC brushless motor of the present utility model.
[0016] Figure 2 is Figure 1 a schematic structural diagram from another perspective.
[0017] Figure 3 is Figure 1 a schematic cross-sectional structural diagram.
[0018] Figure 4 is a schematic structural diagram of one embodiment of the bracket structure of the outer-rotor DC brushless motor of the present utility model.
[0019] Figure 5 is a schematic cross-sectional structural diagram of the bracket structure of the outer-rotor DC brushless motor of the present utility model in cooperation with a sliding bearing.
[0020] Figure 6 is a schematic cross-sectional structural diagram of the bracket structure of the outer-rotor DC brushless motor of the present utility model in cooperation with a rolling bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The present utility model will be further described in detail below with reference to the drawings.
[0022] Refer to Figures 1 to 4。The bracket structure of an outer-rotor DC brushless motor includes a frame body 1. An installation post 2 is provided on the frame body 1. A first installation hole 21 and a second installation hole 22 are successively provided on the installation post 2. The first installation hole 21 and the second installation hole 22 are communicated with each other. The first installation hole 21 is located at one end of the second installation hole 22, and the aperture of the second installation hole 22 is smaller than that of the first installation hole 21. Among them, the installation post 2 and the frame body 1 are of an integrally die-cast or integrally injection-molded structure. When using die-casting, the material of the frame body 1 can be metal materials such as aluminum alloy, aluminum or zinc alloy.
[0023] During assembly, according to the type of bearing actually installed, the bearing is installed in the corresponding installation hole. For the two ends of the motor shaft where rolling bearings are installed, the rolling bearing 3 (as Figure 6 shown) is installed in the first installation hole 21; while for the sliding bearing installed on the shaft, the sliding bearing 4 (as Figure 5 shown) is installed in the second installation hole 22.
[0024] During actual use, a third installation hole 23 is also provided on the installation post 2. The third installation hole 23 is located at the other end of the second installation hole 22. The aperture of the third installation hole 23 is the same as that of the first installation hole 21, and the third installation hole 23 is communicated with the second installation hole 22. Among them, the axes of the first installation hole 21, the second installation hole 22 and the third installation hole 23 are on the same straight line; a rolling bearing is installed in the third installation hole 23. By having the axes of the first installation hole 21 and the third installation hole 23 on the same straight line, the coaxiality of the two ends of the shaft can be improved.
[0025] A plurality of support feet 11 are provided on the outer periphery of the frame body 1. A fixing hole 12 is provided at one end of each support foot 11 away from the installation post 2. Among them, the support feet 11 can be three or four; through the fixing hole 12, it is convenient for an external screw to pass through the fixing hole 12 and be fixed to other structures, thereby realizing the installation and fixation of the entire frame body 1, and the installation is convenient.
[0026] As Figure 1 , Figure 2 and Figure 3 shown, in an embodiment, an installation groove 13 is provided on one side of the frame body 1. Through the installation groove 13, it is convenient to install the corresponding circuit board of the motor in the installation groove 13 and lock it to the frame body 1 with screws, reserving space for the installation of the circuit board and facilitating the installation of the circuit board on the frame body 1.
[0027] A plurality of limiting blocks 24 are integrally formed on the outer periphery of the installation post 2. Among them, the limiting blocks 24 can cooperate with the corresponding mating grooves of the external stator structure, facilitating the quick positioning and installation of the stator structure on the installation post 2 and facilitating the mating installation of the installation post 2 with other corresponding structures.
[0028] The frame body 1 is integrally formed with reinforcing ribs 14, and the reinforcing ribs 14 and the frame body 1 are of an integrally formed structure. Among them, the reinforcing ribs 14 can be located on one side or both sides of each supporting leg 11 to strengthen the frame body 1.
[0029] During actual use, a U-shaped groove 15 is formed on one side of the frame body 1, and the U-shaped groove 15 is located on one side of the installation groove 13. Through the U-shaped groove 15, one end of the motor circuit board installed in the installation groove 13 can be conveniently extended through the U-shaped groove 15, facilitating the wiring of the circuit board.
[0030] A wire outlet hole 16 is formed on the frame body 1. Through the wire outlet hole 16, the wiring of structures such as windings on the motor can be conveniently led out, improving the neatness of each wire and avoiding messy wiring.
[0031] In some embodiments, a plurality of heat dissipation holes can be formed on the frame body 1 to facilitate the heat dissipation of the corresponding motor structure installed on the frame body 1.
[0032] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.
Claims
1. The support structure of the outer rotor brushless DC motor is characterized in that: The invention comprises a frame body (1), wherein a mounting column (2) is provided on the frame body (1), and a first mounting hole (21) and a second mounting hole (22) are sequentially provided on the mounting column (2), wherein the first mounting hole (21) and the second mounting hole (22) are connected, the first mounting hole (21) is located at one end of the second mounting hole (22), and the aperture of the second mounting hole (22) is smaller than that of the first mounting hole (21).
2. The support structure of the outer rotor brushless DC motor according to claim 1, characterized in that: The mounting column (2) is also provided with a third mounting hole (23), the third mounting hole (23) is located at the other end of the second mounting hole (22), the aperture of the third mounting hole (23) is consistent with the aperture of the first mounting hole (21), and the third mounting hole (23) is connected to the second mounting hole (22).
3. The support structure of the outer rotor brushless DC motor according to claim 2, characterized in that: The mounting column (2) and the frame body (1) are an integrally formed structure.
4. The support structure of the outer rotor DC brushless motor according to claim 3, characterized in that: A plurality of supporting legs (11) are arranged on the outer periphery of the frame body (1), and a fixing hole (12) is arranged at one end of each supporting leg (11) away from the mounting column (2).
5. The support structure of the outer rotor brushless DC motor according to any one of claims 1 to 4, characterized in that: A mounting groove (13) is provided on one side of the frame (1).
6. The support structure of the outer rotor brushless DC motor according to any one of claims 1 to 4, characterized in that: A limit block (24) is provided on the outer periphery of the installation column (2), and there are a plurality of limit blocks (24).
7. The support structure of the outer rotor brushless DC motor according to claim 6, characterized in that: The limiting block (24) and the mounting column (2) are an integrally formed structure.
8. The support structure of the outer rotor DC brushless motor according to claim 4, characterized in that: The frame body (1) is provided with reinforcing ribs (14), and the reinforcing ribs (14) and the frame body (1) are an integrally formed structure.
9. The support structure of the outer rotor DC brushless motor according to any one of claims 1 to 4, characterized in that: A U-shaped groove (15) is provided on one side of the frame body (1), and the U-shaped groove (15) is located on one side of the installation groove (13).
10. The support structure of the outer rotor brushless DC motor according to claim 9, characterized in that: The frame (1) is provided with a wire outlet hole (16).