CN215119499U

CN215119499U - Carbon brush pad

Info

Publication number: CN215119499U
Application number: CN202121500317.3U
Authority: CN
Inventors: 韦涛峰; 易恭才
Original assignee: Shenzhen Power Motor Industrial Co Ltd
Current assignee: Shenzhen Power Motor Industrial Co Ltd
Priority date: 2021-07-03
Filing date: 2021-07-03
Publication date: 2021-12-10
Anticipated expiration: 2031-07-03

Abstract

The utility model provides a carbon brush pad, include: main shaft, carbon brush pad main part and carbon brush main part, main shaft one end is fixed with the commutator, carbon brush pad main part cover is established and is fixed in main shaft one end, two carbon brush main part symmetry sets up in the commutator outside, carbon brush pad main part includes: the inner sleeve is sleeved and fixed at one end of the main shaft, the outer sleeve is fixed on the outer side of the inner sleeve, one end, far away from the commutator, of the outer sleeve is a chamfer with a narrow lower part and a wide upper part, and the chamfer is of an arc structure. The utility model discloses a carbon brush main part is propped open to the chamfer of carbon brush pad main part, has avoided the operation step of pulling out the carbon brush spring, and the equipment saves time, saves the cost of manufacture to can reduce the chamfer angle of carbon brush main part when production, and then reduce the use break-in period of carbon brush main part, and reduce cost to the required precision of mould.

Description

Carbon brush pad

Technical Field

The utility model relates to a carbon brush pad technical field especially relates to a carbon brush pad.

Background

Carbon brushes, also called brushes, are widely used as a sliding contact in many electrical devices. The carbon brush mainly comprises graphite, impregnated graphite and metal (copper and silver) graphite in product application. The carbon brush is a device for transmitting energy or signals between a fixed part and a rotating part of a motor or a generator or other rotating machinery, is generally made of pure carbon and a coagulant, is generally square in shape, is clamped on a metal bracket, is tightly pressed on a rotating shaft by a spring inside, and transmits electric energy to a coil through a commutator when the motor rotates;

because the carbon brushes are arranged in the shell of the motor, when the carbon brushes are arranged, the commutator on the main shaft needs to penetrate through one end of each of the two carbon brushes, so that the carbon brushes are positioned outside the commutator, and therefore, a chamfer needs to be arranged at one end of each carbon brush, and the carbon brushes are displaced through extrusion, so that the installation can be realized;

because the carbon brush needs to be provided with a larger chamfer angle to enable the commutator to penetrate and extrude the carbon brush, the contact area of the end part of the carbon brush is reduced, and the carbon brush can be stably used only in a longer running-in period.

Therefore, it is necessary to provide a carbon brush pad to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the utility model provides a carbon brush pad.

The utility model provides a pair of carbon brush pad, include: the carbon brush comprises a main shaft, a carbon brush pad main body and carbon brush main bodies, wherein a commutator is fixed at one end of the main shaft, the carbon brush pad main bodies are sleeved and fixed at one end of the main shaft, and the two carbon brush main bodies are symmetrically arranged on the outer side of the commutator.

Preferably, the carbon brush pad main body includes: the inner sleeve is sleeved and fixed at one end of the main shaft, the outer sleeve is fixed on the outer side of the inner sleeve, one end, far away from the commutator, of the outer sleeve is a chamfer with a narrow lower part and a wide upper part, and the chamfer is of an arc structure.

Preferably, one side of the carbon brush main body, which is close to the commutator, is provided with a chamfer which is wide at the top and narrow at the bottom and matched with the outer sleeve, and one side of the carbon brush main body is in an arc shape matched with the commutator.

Preferably, reinforcing ribs are fixed between the inner sleeve and the outer sleeve.

Preferably, the inner sleeve, the outer sleeve and the reinforcing ribs are arranged in an integral injection molding mode.

Preferably, the carbon brush main body is provided with stepped protrusions at the wider end of the chamfer at equal intervals.

Preferably, the carbon brush pad main body is made of an insulating material.

Preferably, a chamfer is arranged at one end of the inner wall of the inner sleeve, and the inner wall of the inner sleeve is arranged in a step shape.

Compared with the prior art, the utility model provides a carbon brush pad has following beneficial effect:

the utility model provides a carbon brush pad:

1. when the main shaft penetrates through the two carbon brush main bodies through the chamfer of the outer sleeve on the carbon brush pad main body during installation, the two carbon brush main bodies can be propped open by matching the chamfer formed on the carbon brush main bodies, so that the carbon brush main bodies can be clamped outside the commutator;

2. the inner sleeve inner wall of the carbon brush pad main body is provided with the chamfer, and the inner sleeve inner wall is step-shaped, so that the inner sleeve inner wall can be conveniently inserted into the main shaft, the precision requirement is reduced when the main shaft is arranged on the inner sleeve inner wall, the precision requirement of a manufacturing mold is reduced, and the cost is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure provided by the present invention;

fig. 2 is a schematic structural view of a main body of a carbon brush pad provided by the present invention;

fig. 3 is a schematic structural view of a carbon brush main body according to the present invention;

fig. 4 is a schematic cross-sectional view of the carbon brush pad main body according to the present invention.

Reference numbers in the figures: 1. a main shaft; 2. a commutator; 3. a carbon brush pad main body; 31. an inner sleeve; 32. an outer sleeve; 4. a carbon brush main body; 5. reinforcing ribs; 6. and (4) protruding.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

In an implementation, as shown in fig. 1, a carbon brush pad includes: the carbon brush pad comprises a main shaft 1, a carbon brush pad main body 3 and a carbon brush main body 4, wherein a commutator 2 is fixed at one end of the main shaft 1, the carbon brush pad main body 3 is sleeved and fixed at one end of the main shaft 1, the carbon brush pad main body 3 is made of an insulating material, and the carbon brush main body 4 is symmetrically arranged on the outer side of the commutator 2.

Referring to fig. 2 and 4, the carbon brush pad main body 3 includes: an inner sleeve 31 and an outer sleeve 32, wherein the inner sleeve 31 is sleeved and fixed at one end of the main shaft 1, the outer sleeve 32 is fixed at the outer side of the inner sleeve 31, and one end of the outer sleeve 32 far away from the commutator 2 is arranged in a chamfer with a narrow lower part and a wide upper part, and the chamfer is in a circular arc structure, reinforcing ribs 5 are fixed between the inner sleeve 31 and the outer sleeve 32, the inner sleeve 31, the outer sleeve 32 and the reinforcing ribs 5 are arranged in an integral injection molding way, when the main shaft 1 passes through the two carbon brush main bodies 4 through the chamfer of the outer sleeve 32 on the carbon brush pad main body 3 during the installation, the chamfer formed on the carbon brush main body 4 is matched, the two carbon brush main bodies 4 can be spread, so that the carbon brush main bodies 4 can be clamped at the outer side of the commutator 2, since the carbon brush main body 4 is supported by the chamfer of the carbon brush pad main body 3, the chamfer angle of the carbon brush main body 4 can be reduced during production, and the service running-in period of the carbon brush main body 4 can be further reduced.

Referring to fig. 3, a chamfer with a wide top and a narrow bottom is arranged on one side of the carbon brush main body 4 close to the commutator 2, the chamfer is matched with the outer sleeve 32, one side of the carbon brush main body 4 is in an arc shape matched with the commutator 2, the carbon brush main body 4 is positioned at one end with a wide chamfer and is integrally formed with a step-shaped bulge 6 at an equal distance, the bulge 6 is arranged to reduce damage caused when the commutator 2 extrudes the carbon brush main body 4, and the running-in speed in the running-in period is increased.

Referring to fig. 4, one end of the inner wall of the inner sleeve 31 is provided with a chamfer, and the inner wall of the inner sleeve 31 is arranged in a step shape, so that the inner wall of the inner sleeve 31 can be conveniently inserted into the main shaft 1, the precision requirement when the main shaft 1 is installed on the inner wall of the inner sleeve 31 is reduced, the precision requirement of a manufacturing mold is reduced, and the cost is reduced.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A carbon brush pad, comprising:

the device comprises a main shaft (1), wherein a commutator (2) is fixed at one end of the main shaft (1);

the carbon brush pad main body (3), the carbon brush pad main body (3) is sleeved and fixed at one end of the main shaft (1);

and the two carbon brush main bodies (4) are symmetrically arranged on the outer side of the commutator (2).

2. The carbon brush pad according to claim 1, wherein the carbon brush pad main body (3) includes:

the inner sleeve (31), the said inner sleeve (31) is fixed on one end of the main axis (1) in the cover;

the outer sleeve (32) is fixed on the outer side of the inner sleeve (31), one end, far away from the commutator (2), of the outer sleeve (32) is arranged in a chamfer with the narrow lower part and the wide upper part, and the chamfer is of an arc structure.

3. The carbon brush pad according to claim 1, wherein a side of the carbon brush main body (4) close to the commutator (2) is provided with a chamfer having a wide top and a narrow bottom which are matched with the outer sleeve (32), and the side of the carbon brush main body (4) is arranged in an arc shape which is matched with the commutator (2).

4. The carbon brush pad according to claim 2, characterized in that a reinforcing rib (5) is fixed between the inner sleeve (31) and the outer sleeve (32).

5. The carbon brush pad according to claim 2, characterized in that the inner sleeve (31), the outer sleeve (32) and the reinforcing ribs (5) are provided in one piece by injection molding.

6. The carbon brush pad according to claim 1, wherein the main body (4) is integrally formed with stepped protrusions (6) at a wider chamfered end at equal intervals.

7. The carbon brush pad according to claim 1, characterized in that the carbon brush pad body (3) is made of an insulating material.

8. The carbon brush pad according to claim 2, wherein an end of an inner wall of the inner sleeve (31) is chamfered, and the inner wall of the inner sleeve (31) is stepped.