CN209249857U - The commutator of ribbon line - Google Patents

Abstract

The utility model discloses a kind of commutators of ribbon line, including skeleton, several the positive carbon brush and cathode carbon brush that uniformly form the copper bar of annulus around skeleton periphery and be symmetrically arranged at annulus outer circle two sides and contacted with annulus made by insulating materials, copper bar is integrally rectangle and two neighboring copper bar is spaced from each other there are gap, and the long side edge angle of copper bar passes through arc transition.Carbon brush can reduce the vibration of carbon brush radial motion, improve commutation noise from when rotating between two neighboring copper bar steadily across gap.

Description

The commutator of ribbon line

Technical field

The utility model belongs to engine/motor field, and in particular to a kind of commutator of ribbon line.

Background technique

The principle of commutator is, after coil passes through electric current, can pass through attraction and repulsive force under the action of permanent magnet Rotation was led to the contact that electric line corresponds on commutator originally and was just separated with brush when it goes to magnet balance, and Brush, which is connected to, to be met on the corresponding contact of that group of coil for generating motive force, is ceaselessly repeated down in this way, dc motor It just turns over, detailed construction is as shown in Figure 1, there are two carbon brush in figure, and one connects positive pole, another connects power cathode (as be grounded), commutator is made of (usually 28) several copper bars, and insulating materials is as skeleton, and there are skies between copper bar Gap, in motor rotary course, carbon brush and commutator contact surface are arc surface, and it is line that the circular arc of carbon brush, which is slightly larger than commutator diameter, Contact, when by empty slot between copper bar, partial arc section missing causes carbon brush to be knocked to copper bar both sides of the edge, generates periodic Exciting, therefore higher commutation noise can be generated.

Utility model content

The purpose of the utility model is to provide a kind of commutator of ribbon line, carbon brush from when being rotated between two neighboring copper bar, The vibration of carbon brush radial motion can be reduced, commutation noise is improved steadily across gap.

The technical scheme adopted by the utility model is

A kind of commutator of ribbon line, including made by insulating materials skeleton, several uniformly form around skeleton periphery The copper bar of annulus and it is symmetrically arranged at annulus outer circle two sides and the positive carbon brush and cathode carbon brush, copper bar contacted with annulus is integrally in Rectangle and two neighboring copper bar are spaced from each other there are gap, and the long side edge angle of copper bar passes through arc transition.

As a kind of improvement of the utility model, camber line is cam profile.

As second of improvement of the utility model, camber line is oval camber line.

As the third improvement of the utility model, camber line is circular arc line.

The beneficial effects of the utility model are:

The long side edge angle of copper bar is wedge angle in existing commutator, and carbon brush can be knocked from when rotating between two neighboring copper bar To copper bar wedge angle, generate periodic exciting, therefore higher commutation noise can be generated, and in this commutator copper bar long side side Edge angle can reduce carbon brush radial motion steadily across gap from when rotating between two neighboring copper bar by arc transition, carbon brush Vibration, so as to improve commutation noise.

Detailed description of the invention

Fig. 1 is the schematic diagram of existing commutator.

Fig. 2 is the schematic diagram of the utility model embodiment one.

Fig. 3 is that the schematic diagram after carbon brush is removed in Fig. 2.

Fig. 4 is the long side edge line style schematic diagram of copper bar in the utility model embodiment two.

In figure: 1- anode carbon brush；2- copper bar；3- cathode carbon brush.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples.

A kind of commutator of ribbon line, including made by insulating materials skeleton, several uniformly form around skeleton periphery The copper bar of annulus and it is symmetrically arranged at annulus outer circle two sides and the positive carbon brush and cathode carbon brush, copper bar contacted with annulus is integrally in Rectangle and two neighboring copper bar are spaced from each other there are gap, and the long side edge angle of copper bar passes through arc transition.Existing commutation The long side edge angle of copper bar is wedge angle in device, and carbon brush generates the period from that can knock when rotating between two neighboring copper bar to copper bar wedge angle Property exciting, therefore higher commutation noise can be generated, and the long side edge angle of copper bar passes through arc transition, carbon in this commutator Brush can reduce the vibration of carbon brush radial motion, steadily across gap from when rotating between two neighboring copper bar so as to improve changing To noise.

As shown in Figures 2 and 3, in example 1, camber line is circular arc line, and certain camber line can also use similar ellipse Camber line；As shown in figure 4, in example 2, camber line is cam profile.By experiment, above-mentioned three kinds of camber lines improve commutation noise Effect from by force to it is weak successively are as follows: cam profile, oval camber line, circular arc line.

It should be understood that for those of ordinary skills, it can be modified or changed according to the above description, And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.

Claims (4)

1. a kind of commutator of ribbon line, including made by insulating materials skeleton, several around skeleton periphery uniformly form circle The copper bar of ring and the positive carbon brush and cathode carbon brush for being symmetrically arranged at annulus outer circle two sides and contacting with annulus, copper bar are integrally in long Rectangular and two neighboring copper bar is spaced from each other that there are gaps, it is characterised in that: the long side edge angle of copper bar passes through arc transition.

2. the commutator of ribbon line as described in claim 1, it is characterised in that: camber line is cam profile.

3. the commutator of ribbon line as described in claim 1, it is characterised in that: camber line is oval camber line.

4. the commutator of ribbon line as described in claim 1, it is characterised in that: camber line is circular arc line.