Motor end cover and motor

Abstract

The utility model discloses a motor end cover, which comprises an end cover shell, a shaft hole is coaxially arranged on the end cover shell, a terminal is arranged on the end cover shell, the terminal protrudes out of the outer surface of the end cover shell, and an interface is formed on the inner surface of the end cover shell. A plurality of carbon brush assemblies and a coil are arranged on the inner surface of the end cover shell, one end of the coil is connected with the carbon brush assemblies, the other end of the coil is connected with a terminal, the carbon brush assemblies are arranged along the periphery of the shaft hole, and each carbon brush assembly comprises a carbon brush box and a carbon brush which is telescopically arranged in the carbon brush box. The two sides of the carbon brush box are respectively provided with a positioning clamping piece. In the scheme, the connection stability of the carbon brush box on the end cover shell and the conductive connection stability of the carbon brush and the commutator can be ensured while the carbon brush box can be quickly disassembled, assembled and replaced with accessories such as the carbon brush.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a motor end cover and a motor. Background Art

[0002] The power connection terminal of a motor is usually arranged on the motor end cover. Among them, a carbon brush arranged on the motor end cover is used for electrically connecting with the commutator of the motor. When the carbon brush works, pressure is applied to the carbon brush in sliding contact with the commutator through a spring, so that current can be stably conducted between the fixed body and the rotating body. To realize the positioning and guiding functions of the carbon brush, a carbon brush box or a carbon brush holder is usually arranged outside the carbon brush, so as to ensure that the carbon brush moves telescopically along a fixed direction. In most existing motors, the contact between the carbon brush and the commutator at the output end of the motor is not very tight, which easily causes the problem of low power conversion efficiency. To improve the tightness of the contact between the motor carbon brush and the commutator and improve the stability of the connection of the carbon brush box, in the existing solutions, such as the utility model patent with the authorization announcement number CN206272384U, the carbon brush box and the carbon brush are fixed by setting screws at fixed points, or the carbon brush box and the carbon brush are integrally formed. However, this structure is not convenient for the installation of the carbon brush or the carbon brush box. At the same time, the carbon brush is easily worn during use, and this structure is not conducive to the rapid replacement of the carbon brush or other components in the carbon brush box. In addition, in the prior art, the carbon brush box is connected with the carbon brush. Due to the long-term telescopic movement of the carbon brush, it is easy to affect the connection tightness between the carbon brush box and the carbon brush and between the carbon brush box and the end cover, thus having a great impact on the performance and service life of the motor itself. Summary of the Utility Model

[0003] Therefore, to solve the above problems, the utility model provides a motor end cover and a motor.

[0004] The utility model is realized by the following technical solutions:

[0005] A motor end cover includes an end cover housing. A shaft hole is coaxially provided on the end cover housing. Terminals are provided on the end cover housing. The terminals protrude from the outer surface of the end cover housing, and interfaces are formed on the inner surface of the end cover housing. A plurality of carbon brush assemblies and coils are provided on the inner surface of the end cover housing. One end of the coil is connected to the carbon brush assembly, and the other end is connected to the terminal. The carbon brush assemblies are arranged along the outer circumference of the shaft hole. Each carbon brush assembly includes a carbon brush box and a carbon brush telescopically arranged in the carbon brush box. Positioning and clamping members are provided on both sides of the carbon brush box. The positioning and clamping members include I-shaped first clamping members provided on both sides of the carbon brush box, and second clamping members integrally provided with the end cover housing and matching with the first clamping members. Each second clamping member includes two F-shaped limiting members arranged side by side and symmetrically along the telescopic direction of the carbon brush, and an I-shaped positioning groove matching the shape of the first clamping member is formed between the two F-shaped limiting members. The first clamping member is embedded in the I-shaped positioning groove.

[0006] Preferably, the positioning and clamping members on both sides of each carbon brush box are staggeredly arranged.

[0007] Preferably, the carbon brush includes a connecting end and a conductive end. The conductive end is close to the shaft hole, and the surface of the conductive end opposite to the shaft hole is an arc surface. A spring is connected to the connecting end.

[0008] Preferably, an L-shaped limiting block is further provided at the end of the carbon brush box away from the shaft hole. The limiting block is integrally formed with the end cover housing, and one end of the spring is fixed to the limiting block.

[0009] Preferably, an observation hole for observing the spring is further provided at the end of the carbon brush box away from the shaft hole. The observation hole is provided on the upper surface of the carbon brush box.

[0010] Preferably, a coil positioning frame is provided on the inner surface of the end cover housing. A coil is wound on the coil positioning frame. One end of the coil is connected to the carbon brush in one of the carbon brush boxes, and the other end is connected to the interface of the terminal.

[0011] Preferably, it includes two carbon brush boxes and two coil positioning frames. The two carbon brush boxes are arranged oppositely on both sides of the shaft hole. The two coil positioning frames are both located between the carbon brush boxes and the terminals, and are arranged in an eight-shaped pattern on both sides of the interface of the terminals.

[0012] A motor includes the motor end cover as described in any one of the above.

[0013] The beneficial effects of the technical solution of the present utility model are mainly reflected in:

[0014] 1. Positioning and clamping components for facilitating the quick disassembly and assembly of the carbon brush box are provided on both sides of each carbon brush box. Among them, the shape of the I-shaped first clamping component matches that of the I-shaped positioning groove in the second clamping component, and the two F-shaped limiting components of the second clamping component are arranged along the telescopic direction of the carbon brush. Therefore, the second clamping component can limit the first clamping component, that is, the carbon brush box, in the telescopic direction of the carbon brush, thereby improving the stability of the carbon brush box positioning. The clamping components on both sides of the carbon brush box are arranged staggeredly, so as to ensure the balance of the positioning of each part of the carbon brush box. Therefore, while the carbon brush box is convenient for quickly disassembling, replacing carbon brushes and other accessories, it can ensure the stability of the connection of the carbon brush box on the end cover housing.

[0015] 2. One end of the spring is connected to the carbon brush, and the other end is connected to the third limiting component. Therefore, after long-term use, the carbon brush box will not become loose due to the telescopic movement of the carbon brush, and it can also avoid the collision and wear between the carbon brush and the carbon brush box during installation. The third limiting component is integrally formed with the end cover housing, thereby ensuring the stability of the spring positioning.

[0016] 3. The two carbon brush boxes on the end cover housing are arranged oppositely on both sides of the shaft hole. A coil positioning bracket is arranged between each carbon brush box and the terminal. This arrangement structure can ensure that the carbon brushes in the two carbon brush boxes can be telescopically arranged oppositely on the commutator, ensure the uniformity of the forces on both sides of the commutator when the carbon brushes contact the commutator, and ensure the stability of the conductive contact between the carbon brushes and the commutator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the motor end cover;

[0018] Figure 2 is a top view of the outer surface of the motor end cover;

[0019] Figure 3 is Figure 2 a cross-sectional view taken along A - A' in

[0020] Figure 4 is a top view of the inner surface of the motor end cover;

[0021] Figure 5 is a schematic diagram of the partial connection state of the carbon brush assembly;

[0022] Figure 6 is a schematic diagram of the partial connection state of the carbon brush assembly (at this time, the carbon brush box is omitted). DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to clearly and detailedly show the purpose, advantages and features of the present utility model, it will be illustrated and explained through the non-restrictive description of the following preferred embodiments. This embodiment is only a typical example of applying the technical solution of the present utility model, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present utility model.

[0024] At the same time, it is stated that in the description of the solution, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" in this solution are only used for descriptive purposes and cannot be construed as indicating or implying a ranking of importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0026] The present utility model discloses a motor end cover, as Figures 1 - 4 shown, which includes an end cover housing 1. A shaft hole 101 is coaxially arranged on the end cover housing 1. The shaft hole 101 is used to avoid and install a commutator. Terminals 2 are arranged on the end cover housing 1. The terminals 2 protrude from the outer surface of the end cover housing 1, and an interface is formed on the inner surface of the end cover housing 1. A plurality of carbon brush assemblies and coils (not shown in the figure) are arranged on the inner surface of the end cover housing 1. One end of the coil is connected to the carbon brush assembly, and the other end is connected to the terminal 2, so as to realize the conductive transmission between the carbon brush 4 and the terminal 2. The carbon brush assemblies are arranged along the outer circumference of the shaft hole 101. Each carbon brush assembly includes a carbon brush box 3 and a carbon brush 4 telescopically arranged in the carbon brush box 3, so as to ensure that during the rotation of the commutator of the motor, the carbon brush 4 always stably fits with the commutator, thereby realizing the conductive connection between the carbon brush 4 and the commutator.

[0027] As Figures 4 - 6As shown, positioning and clamping components are provided on both sides of the carbon brush box 3. The positioning and clamping components include I-shaped first clamping components 5 provided on both sides of the carbon brush box 3, and second clamping components 6 integrally provided with the end cover housing 1 and matching with the first clamping components 5. Each second clamping component 6 includes two F-shaped limiting components arranged in parallel and symmetrically along the telescopic direction of the carbon brush 4. Since the two F-shaped limiting components are arranged in parallel along the telescopic direction of the carbon brush 4, it can ensure the limitation of the first clamping component 5 in the extending and contracting directions of the carbon brush 4. A positioning groove in the shape of an I-shape matching the shape of the first clamping component 5 is formed between the two F-shaped limiting components in the second clamping component 6. The first clamping component 5 is embedded in the I-shaped positioning groove, which is convenient for quick disassembly and assembly on the one hand, and ensures the stability of the connection between the carbon brush box 3 and the end cover housing 1 on the other hand.

[0028] As Figure 4 shown, in a preferred embodiment, the positioning and clamping components on both sides of each carbon brush box 3 are arranged staggeredly, that is, the positioning and clamping components on both sides of the carbon brush box 3 are not arranged facing each other, but are arranged at different positions on both sides of the carbon brush box 3 in a staggered manner, so as to ensure the stability and balance of the overall positioning of the carbon brush box 3 and avoid unstable connection at one end of the carbon brush box 3 during operation.

[0029] As Figure 5 、 Figure 6 shown, the carbon brush 4 includes a connection end and a conductive end. The conductive end is close to the shaft hole 101, and the surface of the conductive end opposite to the shaft hole 101 (that is, the contact surface between the carbon brush 4 and the outer circumference of the commutator) is an arc surface, so as to ensure the fit between the carbon brush 4 and the outer circumference of the commutator. A spring 7 is connected to the connection end. In one embodiment, an L-shaped limiting block 8 is further provided at the end of the carbon brush box 3 away from the shaft hole 101. The limiting block 8 is integrally formed with the end cover housing 1. One end of the spring 7 is fixed to the limiting block 8, and the other end is connected to the carbon brush 4, so that the carbon brush 4 always remains in contact with the outer circumference of the commutator under the pressure of the spring 7.

[0030] In some embodiments, an observation hole 9 for observing the spring 7 is further provided at the end of the carbon brush box 3 away from the shaft hole 101. The observation hole 9 is provided on the upper surface of the carbon brush box 3. As Figure 5 shown, in one embodiment, the observation hole 9 is a trapezoidal notch provided at the end of the carbon brush box 3.

[0031] As Figures 4 - 6 shown, in some embodiments, a coil positioning frame 10 is provided on the inner surface of the end cover housing 1. A coil is wound on the coil positioning frame 10. One end of the coil is connected to the carbon brush 4 in one of the carbon brush boxes 3, and the other end is connected to the interface of the terminal 2.

[0032] AsFigure 4 As shown, in one embodiment, the motor end cover includes two carbon brush boxes 3 and two coil positioning brackets 10. The two carbon brush boxes 3 are arranged facing each other on both sides of the shaft hole 101. The two coil positioning brackets 10 are both located between the carbon brush box 3 and the terminal 2, and are arranged in a V-shaped layout on both sides of the interface of the terminal 2. The carbon brushes 4 in the two carbon brush boxes 3 are also arranged facing each other on both sides of the outer circumference of the commutator, so as to ensure the balance of forces on both sides of the commutator and the stability of the conductive contact between the carbon brush 4 and the commutator.

[0033] The present invention also discloses a motor, including the motor end cover as described in any one of the above.

[0034] There are still various embodiments of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the protection scope of the present invention.

Claims

1. Motor end cover, characterized in that: It includes an end cover housing, on which a shaft hole is coaxially arranged. Terminals are arranged on the end cover housing. The terminals protrude from the outer surface of the end cover housing, and interfaces are formed on the inner surface of the end cover housing. A plurality of carbon brush assemblies and coils are arranged on the inner surface of the end cover housing. One end of the coil is connected to the carbon brush assembly, and the other end is connected to the terminal. The carbon brush assemblies are arranged along the outer periphery of the shaft hole. Each carbon brush assembly includes a carbon brush box and a carbon brush telescopically arranged in the carbon brush box. Positioning and clamping parts are arranged on both sides of the carbon brush box. The positioning and clamping parts include I-shaped first clamping parts arranged on both sides of the carbon brush box, and second clamping parts integrally formed with the end cover housing and matching with the first clamping parts. Each second clamping part includes two F-shaped limiting parts arranged side by side and symmetrically along the telescopic direction of the carbon brush, and an I-shaped positioning groove matching with the shape of the first clamping part is formed between the two F-shaped limiting parts. The first clamping part is embedded in the I-shaped positioning groove.

2. The motor end cover according to claim 1, characterized in that: The positioning and clamping parts on both sides of each carbon brush box are arranged staggeredly.

3. The motor end cover according to claim 1, characterized in that: The carbon brush includes a connecting end and a conductive end. The conductive end is close to the shaft hole, and the surface of the conductive end opposite to the shaft hole is an arc surface. A spring is connected to the connecting end.

4. The motor end cover according to claim 3, characterized in that: An L-shaped limiting block is further arranged at the end of the carbon brush box far from the shaft hole. The limiting block is integrally formed with the end cover housing, and one end of the spring is fixed to the limiting block.

5. The motor end cover according to claim 1, characterized in that: An observation hole for observing the spring is further arranged at the end of the carbon brush box far from the shaft hole. The observation hole is arranged on the upper surface of the carbon brush box.

6. The motor end cover according to claim 1, characterized in that: A coil positioning frame is arranged on the inner surface of the end cover housing. The coil is wound on the coil positioning frame. One end of the coil is connected to the carbon brush in one of the carbon brush boxes, and the other end is connected to the interface of the terminal.

7. The motor end cover according to claim 6, characterized in that: It includes two carbon brush boxes and two coil positioning frames. The two carbon brush boxes are arranged oppositely on both sides of the shaft hole. The two coil positioning frames are both located between the carbon brush box and the terminal, and are arranged in an eight-shaped layout on both sides of the interface of the terminal.

8. Electric motor, characterized in that: It includes the motor end cover according to any one of claims 1-7.

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