CN213959293U

CN213959293U - Novel direct current motor rolling carbon brush

Info

Publication number: CN213959293U
Application number: CN202022437564.5U
Authority: CN
Inventors: 李锋; 吴清其
Original assignee: Fuzhou Wande Power Technology Co ltd
Current assignee: Fuzhou kaimeiyi Intelligent Equipment Manufacturing Co.,Ltd.
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-08-13
Anticipated expiration: 2030-10-28

Abstract

The utility model discloses a novel direct current motor rolling carbon brush in the technical field of motors, which comprises a brush body, wherein a plurality of groups of brass rotating shafts which are arranged in a staggered way are arranged on the brush body, the outer wall of each brass rotating shaft is movably connected with a lead contact roller in a one-to-one correspondence, and the plurality of groups of lead contact rollers are all in rolling friction fit with the outer wall of a commutator; the traditional carbon brush has larger change along with the pressing force of a carbon brush abrasion spring, so that the pre-tightening force of the carbon brush at different positions is convenient to distribute.

Description

Novel direct current motor rolling carbon brush

Technical Field

The utility model relates to the technical field of electric machines, specifically a novel direct current motor rolls carbon brush.

Background

The carbon brush of the direct current motor is directly pressed on a commutator of the direct current motor through a spring by utilizing the conductivity of graphite and the self-lubricating property of the graphite.

Because the service life of the sliding friction commutator and the carbon brush is short, the carbon brush generates heat seriously when in work, the length of the carbon brush is shortened after the carbon brush is worn, the pressing force of the spring is changed along with the change of the carbon brush, and the pressing force is not easy to control.

Based on this, the utility model designs a novel direct current motor rolls carbon brush to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel direct current motor rolls carbon brush to current sliding friction commutator and carbon brush life-span that provide in solving above-mentioned background art are all very short, and the carbon brush is serious at the during operation, and length shortens after the carbon brush wearing and tearing, and the packing force of spring changes thereupon, and the packing force is difficult to the problem of control.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel direct current motor rolls carbon brush, includes the brush body, be provided with the crisscross brass pivot of arranging of multiunit on the brush body, brass pivot outer wall swing joint has the lead contact roller of one-to-one, multiunit lead contact roller all with commutator outer wall rolling friction fit.

Preferably, the brush body is electrically connected with a lead.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has long service life of the rolling carbon brush, small loss of the carbon brush, and higher efficiency of the motor; the carbon powder and dust are easy to cause short circuit of equipment due to serious abrasion of the traditional carbon brush, and the carbon powder is also a carcinogen; the use of lead as a contact terminal is less prone to spark; the traditional carbon brush has larger change along with the pressing force of a carbon brush abrasion spring, so that the pre-tightening force of the carbon brush at different positions is convenient to distribute.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the staggered arrangement structure of the lead contact rollers of the present invention;

1. a wire; 2. a brush body; 3. a lead contact roller; 4. a brass rotating shaft; 5. a commutator.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a novel direct current motor rolls carbon brush, includes brush body 2, is provided with the crisscross brass pivot 4 of arranging of multiunit on the

brush body

2, and 4 outer wall swing joint of brass pivot have the lead contact roller 3 of one-to-one, and multiunit lead contact roller 3 all with 5 outer wall rolling friction fit of commutator.

Further, the brush body 2 is electrically connected with a lead 1.

The utility model discloses an embodiment:

brush body 1 is provided with the elastic component outward, the elastic force through the elastic component promotes lead contact roller 3 all the time with commutator 5's outer wall butt, be provided with the crisscross brass pivot 4 of arranging of multiunit on brush body 1's the arcwall face, brush body 1's arcwall face and commutator 5's the coaxial cooperation of external diameter, the axis of brass pivot 4 all is parallel with commutator 5's axis, 3 swivelling joint of lead contact roller are at the 4 outer walls of brass pivot of one-to-one, thereby be rolling friction fit when commutator 5 is rotatory between 3 with the lead contact roller of multiunit.

Multiunit brass pivot 4 is crisscross arranges and to guarantee to butt all the time between lead contact roller 3 and the commutator 5, and the benefit is that commutator 5 will have a plurality of circular current conduction simultaneously, and circular tangent point only one, staggers and arranges and can solve this problem, and the space stagger is arranged and can be let the friction dust discharge easily, and the heat dissipation is also good. The staggered arrangement can ensure that the diameter of the lead contact roller 3 is slightly larger without mutual interference, and can also dissipate heat and be beneficial to the discharge of dust.

The current is transmitted among the lead wire 1, the brass rotating shaft 4, the lead contact roller 3 and the commutator 5 in sequence.

Lead is used as the contact roller, and because the lead is softer and has small contact loss with copper, sparks are not easy to occur, so that the sparks are not easy to occur when the lead contact roller 3 rotates on the outer wall of the brass rotating shaft 4.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a novel direct current motor rolls carbon brush, includes brush body (2), its characterized in that: the novel brush is characterized in that a plurality of groups of brass rotating shafts (4) which are arranged in a staggered mode are arranged on the brush body (2), the outer walls of the brass rotating shafts (4) are movably connected with lead contact rollers (3) which correspond to one another one by one, and the lead contact rollers (3) are matched with the outer wall of the commutator (5) in a rolling friction mode.

2. The novel direct current motor rolling carbon brush according to claim 1, characterized in that: the brush body (2) is electrically connected with a lead (1).