A new type of brushless motor stator fixing support

Abstract

The utility model discloses a novel brushless motor stator fixed bolster, including the bracket main part of tubular structure, the upper and lower both ends pipe orifice of bracket main part is equipped with respectively upper and lower bearing chamber, and the upper bearing chamber is inlayed with the bearing of ball bearing, and the lower bearing chamber is equipped with the oil-impregnated spherical bearing, the lower bearing chamber still is equipped with respectively with the upper and lower bracket of oil-impregnated spherical bearing's upper and lower both ends fixed cooperation, and the upper and lower bracket all have the multiple elastic sheets of the circumferential interval arrangement of bracket main part, and the elastic sheet has the arc structure cooperation with the outer wall surface of oil-impregnated spherical bearing. The utility model discloses because the elastic sheet has elasticity and can cooperate with the outer wall surface structure of oil-impregnated spherical bearing, makes the upper and lower bracket to oil-impregnated spherical bearing for flexible fixed, and the oil-impregnated spherical bearing plays the role of automatic pilot motor shaft with the bearing of ball bearing after motor assembly is completed, reduces the concentricity requirement to upper and lower bearing chamber, makes the motor steady operation under guaranteeing the concentricity requirement of bearing chamber, and the processing difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of brushless motors, specifically to a novel brushless motor stator fixing bracket. Background Technology

[0002] The primary function of a brushless motor is to generate driving torque, serving as a power source for electrical appliances or various machines. The stator mounting bracket, as the main supporting component of the brushless motor, is used to fix the PCB board and stator. Existing stator mounting brackets use annular protrusions within their inner cavity to form steps, with bearing chambers on either side of the steps. Stator mounting brackets with this structure are mostly made of aluminum alloy and formed by die casting. This results in poor concentricity of the bearings after installation, affecting the quality of the motor. Furthermore, die casting production is inefficient, typically producing only four semi-finished products per minute. Utility Model Content

[0003] Based on this, the present invention provides a novel brushless motor stator fixing bracket to solve the technical problem of poor concentricity of the bearings after installation in the existing brushless motor stator fixing bracket.

[0004] To achieve the above objectives, this utility model provides a novel brushless motor stator fixing bracket, comprising a tubular bracket body, wherein an upper bearing chamber and a lower bearing chamber are respectively provided in the upper and lower ends of the bracket body, a bearing chamber is embedded in the upper bearing chamber, and a spherical oil-impregnated bearing is provided in the lower bearing chamber;

[0005] The lower bearing chamber is also provided with an upper bracket and a lower bracket that are fixedly engaged with the upper and lower ends of the spherical oil-impregnated bearing, respectively. Both the upper bracket and the lower bracket have multiple spring pieces spaced apart along the circumference of the main body of the support. The spring pieces have an arc-shaped structure that engages with the outer wall surface of the spherical oil-impregnated bearing.

[0006] As a further preferred technical solution of this utility model, the upper bracket and the main body of the support are an integral structure, and the spring piece of the upper bracket is connected to the inner wall surface of the main body of the support.

[0007] As a further preferred technical solution of this utility model, the lower bracket includes an annular body that is snapped into the lower bearing chamber, and the spring pieces of the lower bracket are circumferentially spaced on the annular body.

[0008] As a further preferred technical solution of this utility model, the upper end face of the bracket body is provided with at least two coplanar first lugs, and the first lugs are provided with screw holes.

[0009] As a further preferred technical solution of this utility model, the upper end face of the bracket body is provided with at least two coplanar second lugs, and the second lugs are provided with positioning protrusions for positioning and installing the bracket body.

[0010] As a further preferred technical solution of this utility model, at least two positioning posts are provided at intervals on the upper outer periphery of the bracket body. Each positioning post includes a column portion forming an "L"-shaped structure and a connecting portion. The column portion is arranged along the axial direction of the bracket body, and the connecting portion is arranged along the radial direction of the bracket body. The bracket body is connected to the column portion through the connecting portion. The positioning posts are used to fix and position the motor mainboard sleeved on the bracket body. The motor mainboard is provided with positioning holes.

[0011] This utility model discloses a novel brushless motor stator fixing bracket. It comprises an upper bracket and a lower bracket, respectively fixedly fitted to the upper and lower ends of a spherical oil-impregnated bearing, within the lower bearing housing. Both the upper and lower brackets have multiple elastic tabs spaced circumferentially along the bracket body. These elastic tabs have an arc-shaped structure that mates with the outer wall surface of the spherical oil-impregnated bearing. Because the elastic tabs are elastic and can mate with the outer wall surface of the spherical oil-impregnated bearing, the upper and lower brackets flexibly fix the spherical oil-impregnated bearing. After motor assembly, the spherical oil-impregnated bearing and the bearing bearing automatically guide the motor shaft, reducing the concentricity requirements of the upper and lower bearing housings. This ensures stable motor operation while maintaining bearing housing concentricity, reduces manufacturing difficulty, and simultaneously lowers noise, thereby improving motor lifespan. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 A perspective structural schematic diagram of an embodiment of a novel brushless motor stator fixing bracket.

[0014] Figure 2 This is a side perspective structural diagram of the main body of the support frame.

[0015] Figure 3 This is a schematic diagram of the upper surface structure of the main support body.

[0016] Figure 4 This is a structural diagram of the lower bracket.

[0017] Figure 5 This is a schematic diagram of the structure of a spherical oil-impregnated bearing and a bearing bearing.

[0018] In the diagram: 1. Support body, 11. Positioning column, 12. First lug, 13. Second lug, 14. Upper bearing chamber, 15. Lower bearing chamber, 2. Bearing bearing, 3. Spherical oil-impregnated bearing, 4. Motor main board, 5. Upper bracket, 6. Lower bracket.

[0019] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Terms such as "upper," "lower," "left," "right," "middle," and "one" used in the preferred embodiments are merely for clarity of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of the present invention.

[0021] like Figures 1-5 As shown, this utility model provides a novel brushless motor stator fixing bracket, including a tubular bracket body 1. The upper and lower ends of the bracket body 1 are respectively provided with an upper bearing chamber 14 and a lower bearing chamber 15. The upper bearing chamber 14 is fitted with a bearing 2, and the lower bearing chamber 15 is provided with a spherical oil-impregnated bearing 3.

[0022] The lower bearing chamber 15 is further provided with an upper bracket 5 and a lower bracket 6, which are respectively fixedly engaged with the upper and lower ends of the spherical oil-impregnated bearing 3. Both the upper bracket 5 and the lower bracket 6 have multiple spring pieces spaced circumferentially along the main support body 1. Each spring piece has an arc-shaped structure that engages with the outer wall surface of the spherical oil-impregnated bearing 3. Because the spring pieces are elastic and can engage with the outer wall surface structure of the spherical oil-impregnated bearing 3, the upper bracket 5 and the lower bracket 6 flexibly fix the spherical oil-impregnated bearing 3. After the motor is assembled, the spherical oil-impregnated bearing and the bearing bearing 2 automatically guide the motor shaft, reducing the concentricity requirements of the upper bearing chamber 14 and the lower bearing chamber 15. This ensures stable motor operation while maintaining bearing chamber concentricity, reduces processing difficulty, and simultaneously reduces noise, thereby improving motor lifespan.

[0023] The upper bracket 5 and the main body 1 are integrally formed. The spring pieces of the upper bracket 5 are connected to the inner wall of the main body, and can be formed by bending the tube wall of the main body 1 outward after partial cutting. The lower bracket 6, also known as a cloverleaf spring piece, includes a ring body that is snapped into the lower bearing chamber 15. The spring pieces of the lower bracket 6 are circumferentially spaced on the ring body.

[0024] At least two positioning posts 11 are spaced apart on the upper outer periphery of the support body 1. Each positioning post 11 includes a column portion forming an "L" shape and a connecting portion. The column portion is arranged along the axial direction of the support body 1, and the connecting portion is arranged along the radial direction of the support body 1. The support body 1 is connected to the column portion through the connecting portion. The positioning posts 11 are used to fix and position the motor main board 4 sleeved on the support body 1. The motor main board 4 is provided with positioning holes. To further fix the motor main board 4 to the support body 1, at least two coplanar first lugs 12 are spaced apart on the upper end face of the support body 1. The first lugs 12 are provided with screw holes, and the motor main board 4 is fixed by screws passing through the screw holes.

[0025] The upper end face of the bracket body 1 is provided with at least two coplanar second lugs 13, and the second lugs 13 are provided with positioning protrusions for positioning and installation of the bracket body 1, so as to facilitate positioning during installation.

[0026] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is defined only by the appended claims.

Claims

1. A novel brushless motor stator fixing bracket, characterized in that, The support body includes a tubular structure, with an upper bearing chamber and a lower bearing chamber respectively located in the upper and lower ends of the tube. A bearing is installed in the upper bearing chamber, and a spherical oil-impregnated bearing is installed in the lower bearing chamber. The lower bearing chamber is also provided with an upper bracket and a lower bracket that are fixedly engaged with the upper and lower ends of the spherical oil-impregnated bearing, respectively. Both the upper bracket and the lower bracket have multiple spring pieces spaced apart along the circumference of the main body of the support. The spring pieces have an arc-shaped structure that engages with the outer wall surface of the spherical oil-impregnated bearing.

2. The novel brushless motor stator fixing bracket according to claim 1, characterized in that, The upper bracket and the main body of the support are an integral structure, and the spring piece of the upper bracket is connected to the inner wall surface of the main body of the support.

3. The novel brushless motor stator fixing bracket according to claim 1, characterized in that, The lower bracket includes an annular body that is snapped into the lower bearing chamber, and the spring clips of the lower bracket are circumferentially spaced on the annular body.

4. The novel brushless motor stator fixing bracket according to claim 1, characterized in that, The upper end face of the bracket body is provided with at least two coplanar first lugs, and the first lugs are provided with screw holes.

5. The novel brushless motor stator fixing bracket according to claim 1 or 4, characterized in that, At least two positioning posts are spaced apart on the upper outer periphery of the support body. Each positioning post includes a column portion forming an "L" shape and a connecting portion. The column portion is arranged along the axial direction of the support body, and the connecting portion is arranged along the radial direction of the support body. The support body is connected to the column portion through the connecting portion. The positioning post is used to fix and position the motor mainboard sleeved on the bracket body; the motor mainboard is provided with positioning holes.

6. The novel brushless motor stator fixing bracket according to claim 1, characterized in that, The upper end face of the bracket body is provided with at least two coplanar second lugs, and the second lugs are provided with positioning protrusions for positioning and installing the bracket body.

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