Carbon brush cover brush box

Abstract

According to the carbon brush cover brush box, a part of space is reserved at a part, close to a commutator, of a carbon brush cover brush box assembly, so that abnormal wear caused by deformation of the interior of the brush box and a carbon brush is avoided, a heat dissipation space is larger, heat dissipation is facilitated, and the carbon brush cover brush box is not easily stuffed.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a carbon brush cover and brush box. Background Art

[0002] The carbon brush cover and brush box of the prior art have the following performance disadvantages: the original length of the carbon brush cover and brush box covers the length of the carbon brush working stroke. When the motor works for a long time, a large amount of heat will be generated, and the heat will cause the brush box to deform. However, due to the limitations of its design structure, the deformation will be uneven, causing the carbon brush to get stuck and not run smoothly. Summary of the invention

[0003] In view of this, the utility model provides a carbon brush cover and a brush box.

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

[0005] A carbon brush cover box comprises a carbon brush box assembly and a motor body, wherein the motor body is composed of a shell and a shell cover, the carbon brush box assembly is arranged on the shell cover, an installation cavity is formed between the shell and the shell cover, a motor component and a commutator are arranged in the installation cavity, the commutator is arranged on the motor component, and a heat dissipation space is formed between the side of the carbon brush box assembly close to the commutator and the commutator.

[0006] Preferably, the motor assembly includes a motor shaft, a rotor core plastic seal, enameled wire, a magnetic steel and a spring washer, a motor shaft mounting portion is arranged on the bottom cavity wall of the mounting cavity, the motor shaft mounting portion is arranged in a groove-shaped structure, the bottom end of the motor shaft extends into the motor shaft mounting portion and is connected to the shell, the top end of the motor shaft passes through the shell cover, the commutator is sleeved on the part of the motor shaft located in the mounting cavity, and the commutator is arranged on the side of the motor shaft close to the shell cover.

[0007] Preferably, the rotor core plastic seal and spring washer are both arranged on one side of the motor shaft close to the motor shaft mounting portion, a lower bearing is arranged between the motor shaft mounting portion and the motor shaft, the spring washer is arranged above the lower bearing, and the rotor core plastic seal is arranged above the spring washer.

[0008] Preferably, the magnetic steel is arranged in an annular structure on the outside of the rotor core plastic package, and a retaining frame is also arranged in the installation cavity. The retaining frame has a magnetic steel slot, and the magnetic steel is arranged in the magnetic steel slot. The retaining frame supports the magnetic steel.

[0009] Preferably, the carbon brush box assembly is made of high temperature resistant plastic material.

[0010] Preferably, the carbon brush box assembly is made of PPA or PA6 / 6T.

[0011] The beneficial effect of the utility model is that by reserving a part of space at the position of the carbon brush cover and brush box assembly close to the commutator, abnormal wear of the brush box and the carbon brushes caused by deformation can be avoided, and the heat dissipation space is larger, which is conducive to heat dissipation and not easy to be suffocated. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Attached Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] The utility model will be further described below in conjunction with the accompanying drawings of the specification.

[0016] The utility model provides the following technical solutions:

[0017] As attached Figure 1 As shown, the utility model discloses a carbon brush cover box, including a carbon brush box assembly 1 and a motor body 2, wherein the motor body 2 is composed of a shell 3 and a shell cover 4, wherein the carbon brush box assembly 1 is arranged on the shell cover 4, wherein a mounting cavity 5 is formed between the shell 3 and the shell cover 4, wherein a motor assembly 6 and a commutator 7 are arranged in the mounting cavity 5, wherein the commutator 7 is arranged on the motor assembly 6, and a heat dissipation space 8 is formed between the side of the carbon brush box assembly 1 close to the commutator 7 and the commutator 7. Specifically, in the present design, a portion of space is reserved at the part of the carbon brush cover box assembly close to the commutator 7 to avoid abnormal wear of the brush box and the carbon brushes due to deformation, and the heat dissipation space 8 is larger, which is conducive to heat dissipation and is not easy to be suffocated.

[0018] Further, the motor assembly 6 includes a motor shaft 9, a rotor core plastic package 10, an enameled wire 11, a magnetic steel 12 and a spring washer 13. A motor shaft mounting portion 14 is provided on the bottom cavity wall of the installation cavity 5. The motor shaft mounting portion 14 is provided in a groove-shaped structure. The bottom end of the motor shaft 9 extends into the motor shaft mounting portion 14 and is connected to the housing 3. The top end of the motor shaft 9 passes through the shell cover 4. The commutator 7 is sleeved on the portion of the motor shaft 9 located in the installation cavity 5, and the commutator 7 is provided on the side of the motor shaft 9 close to the shell cover 4. Specifically, in the present embodiment, by providing the motor shaft mounting portion 14, it is possible to facilitate the positioning of the motor shaft 9 in the installation cavity 5, so that the position of the motor shaft 9 will not be offset during the rotation process.

[0019] Furthermore, the rotor core plastic package 10 and the spring washer 13 are both arranged on one side of the motor shaft 9 close to the motor shaft mounting portion 14, a lower bearing 15 is arranged between the motor shaft mounting portion 14 and the motor shaft 9, the spring washer 13 is arranged above the lower bearing 15, and the rotor core plastic package 10 is arranged above the spring washer 13.

[0020] Furthermore, the magnetic steel 12 is arranged in an annular structure on the outside of the rotor core plastic package 10, and a retainer 16 is also arranged in the installation cavity 5. The retainer 16 has a magnetic steel slot (not shown), and the magnetic steel 12 is arranged in the magnetic steel slot. The retainer 16 supports the magnetic steel 12. Specifically, in this embodiment, by fixing the magnetic steel 12 in the magnetic steel slot on the retainer 16, the retainer 16 can support the magnetic steel 12, thereby avoiding the position deviation of the magnetic steel 12 caused by the vibration during the operation of the motor, and ensuring the stability of the motor during operation.

[0021] Furthermore, the carbon brush box assembly 1 is made of a high temperature resistant plastic material. Specifically, in this embodiment, the carbon brush box assembly 1 is made of PPA or PA6 / 6T material, which is resistant to high temperatures and not easily deformed.

[0022] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon brush cover and brush box, comprising a carbon brush box assembly and a motor body, characterized in that: The motor body is composed of a shell and a shell cover, the carbon brush box assembly is arranged on the shell cover, an installation cavity is formed between the shell and the shell cover, a motor assembly and a commutator are arranged in the installation cavity, the commutator is arranged on the motor assembly, and a heat dissipation space is formed between the side of the carbon brush box assembly close to the commutator and the commutator.

2. The carbon brush cover box according to claim 1, characterized in that: The motor assembly includes a motor shaft, a rotor core plastic seal, enameled wire, a magnetic steel and a spring washer. A motor shaft mounting portion is arranged on the bottom cavity wall of the mounting cavity. The motor shaft mounting portion is arranged in a groove-shaped structure. The bottom end of the motor shaft extends into the motor shaft mounting portion and is connected to the shell. The top end of the motor shaft passes through the shell cover. The commutator is sleeved on the part of the motor shaft located in the mounting cavity, and the commutator is arranged on the side of the motor shaft close to the shell cover.

3. The carbon brush cover box according to claim 2, characterized in that: The rotor core plastic seal and spring washer are both arranged on one side of the motor shaft close to the motor shaft mounting portion, a lower bearing is arranged between the motor shaft mounting portion and the motor shaft, the spring washer is arranged above the lower bearing, and the rotor core plastic seal is arranged above the spring washer.

4. The carbon brush cover box according to claim 2, characterized in that: The magnetic steel is arranged in an annular structure on the outside of the rotor core plastic package. A retaining frame is also arranged in the installation cavity. A magnetic steel slot is provided on the retaining frame. The magnetic steel is arranged in the magnetic steel slot. The retaining frame supports the magnetic steel.

5. The carbon brush cover box according to claim 1, characterized in that: The carbon brush box assembly is made of high temperature resistant plastic material.

6. The carbon brush cover box according to claim 5, characterized in that: The material of the carbon brush box assembly is PPA or PA6 / 6T.

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