CN214281151U

CN214281151U - Carbon crystal and commutator matching structure of motor

Info

Publication number: CN214281151U
Application number: CN202120678549.1U
Authority: CN
Inventors: 任成波; 童腾超
Original assignee: Ningbo Jingcheng Car Industry Co ltd
Current assignee: Ningbo Jingcheng Car Industry Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-09-24
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses a matching structure of a carbon crystal and a commutator of a motor, which comprises a commutator (2) assembled at the center of a motor end cover (1) and a pair of carbon crystals (3) assembled on the motor end cover (1) and distributed along the circumference of the commutator (2), wherein the pair of carbon crystals (3) are both provided with only one tip part (31) contacted with the outer side surface of a pole piece of the commutator (2); the tip part (31) is a line segment, and the line segment is in point contact with the outer side surface of a pole piece of the commutator (2); the cross section of the carbon crystal (3) is in a right trapezoid shape, and the tip part (31) corresponds to the acute angle of the right trapezoid; the central angle corresponding to an arc formed by connecting contact points of two tip parts (31) on the outer side surface of the pole piece of the commutator (2) is 90 degrees. The utility model has the advantages of less friction noise and long service life.

Description

Carbon crystal and commutator matching structure of motor

Technical Field

The utility model relates to the technical field of electric machines, especially a carbon crystal and commutator cooperation structure of motor.

Background

When the motor works, the lead terminal is inserted into a socket or connected with an electric wire to introduce commercial power, and the commercial power is introduced through the carbon crystal, the commutator, the magnetic shoe, the copper coil and the like to generate a magnetic field to rotate the output main shaft. Wherein, two carbon brilliant and commutator's pole piece surface contact could make the normal switching-over work of motor, and at the rotatory in-process of commutator, can produce the friction between carbon brilliant and the commutator, generally be multiple spot contact or face contact between present carbon brilliant and the commutator, and the noise that the friction brought is great, still can influence the life of carbon brilliant and commutator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a carbon of motor is brilliant and commutator cooperation structure. It has the advantages of low friction noise and long service life.

The technical scheme of the utility model: a carbon crystal and commutator matching structure of a motor comprises a commutator assembled in the center of a motor end cover and a pair of carbon crystals assembled on the motor end cover and distributed along the circumferential direction of the commutator, wherein the pair of carbon crystals are provided with only one tip part which is contacted with the outer side surface of a pole piece of the commutator.

Compared with the prior art, the beneficial effects of the utility model are embodied in: each carbon crystal is provided with only one tip part which is contacted with the outer side surface of the pole piece of the commutator, so that the friction noise between the carbon crystal and the commutator is low in the rotating and reversing process of the commutator, and the service life of the carbon crystal and the commutator is prolonged.

In the above carbon crystal and commutator matching structure of the motor, the tip portion is a line segment, and the line segment is in point contact with the outer side surface of the pole piece of the commutator.

In the aforementioned matching structure of the carbon crystal and the commutator of the motor, the cross section of the carbon crystal is in a right trapezoid shape, and the tip portion corresponds to an acute angle of the right trapezoid.

In the above carbon crystal and commutator matching structure of the motor, a central angle corresponding to an arc formed by connecting two tip contact points on the outer side surface of the commutator pole piece is 90 °.

In the carbon crystal and commutator matching structure of the motor, the carbon crystal and the motor end cover are in interference fit connection.

In the carbon crystal and commutator matching structure of the motor, the carbon crystal is connected with the lead.

Drawings

FIG. 1 is a schematic structural diagram of a carbon crystal and a commutator mounted on a motor end cover;

FIG. 2 is a schematic view showing a positional relationship between a carbon crystal and a commutator;

FIG. 3 is a schematic three-dimensional structure of carbon crystals;

fig. 4 is a top view of the view of fig. 3.

Reference numerals: 1-motor end cover, 2-commutator, 3-carbon crystal, 4-lead wire, 31-tip end.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Example (b): a matching structure of a carbon crystal and a commutator of a motor is structurally shown in figures 1-4 and comprises a commutator 2 assembled in the center of a motor end cover 1 and a pair of carbon crystals 3 assembled on the motor end cover 1 and distributed along the circumferential direction of the commutator 2, wherein the pair of carbon crystals 3 are respectively provided with a tip part 31 only contacting with the outer side surface of a pole piece of the commutator 2, and the tip parts 31 abut against the outer side surface of the pole piece of the commutator 2 to generate a certain pressure effect on the outer side surface of the pole piece of the commutator 2 so that the two are not contacted continuously.

Preferably, the tip portion 31 is a line segment, and the line segment is in point contact with the outer surface of the pole piece of the commutator 2, and is in a contact manner of minimizing the area between the carbon crystal 3 and the commutator 2, so that the friction noise between the two is small.

Preferably, the cross section of the carbon crystal 3 has a trapezoidal shape, and the tip 31 corresponds to an acute angle of the trapezoidal shape, and this shape reduces the noise of the motor by about 4dB as compared with a contact method having a shape such as a saw-toothed multipoint contact or a curved surface contact.

Preferably, the central angle corresponding to the arc formed by the contact points of the two tip portions 31 on the outer side surface of the pole piece of the commutator 2 is 90 °.

Preferably, the connection mode that the carbon crystal 3 is in interference fit with the motor end cover 1 is adopted, and the carbon frame for installing the carbon crystal 3 is arranged on the motor end cover 1, so that the carbon crystal 3 is tightly connected and is convenient to disassemble and assemble.

Preferably, the carbon crystal 3 is connected with a lead 4 for leading in commercial power.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Above is only the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above-mentioned embodiments, all belong to the technical scheme of the utility model under the thought all belong to the protection scope of the present invention. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a brilliant and commutator cooperation structure of carbon of motor which characterized in that: the commutator comprises a commutator (2) assembled at the center of a motor end cover (1), and a pair of carbon crystals (3) assembled on the motor end cover (1) and distributed along the circumferential direction of the commutator (2), wherein the carbon crystals (3) are provided with only one tip end part (31) contacted with the outer side surface of a pole piece of the commutator (2).

2. The carbon crystal and commutator mating structure of an electric machine according to claim 1, wherein: the tip part (31) is a line segment, and the line segment is in point contact with the outer side face of a pole piece of the commutator (2).

3. The carbon crystal and commutator mating structure of an electric machine according to claim 1 or 2, wherein: the cross section of the carbon crystal (3) is in a right trapezoid shape, and the tip part (31) corresponds to the acute angle of the right trapezoid.

4. The carbon crystal and commutator mating structure of an electric machine according to claim 2, wherein: the central angle corresponding to an arc formed by connecting contact points of two tip parts (31) on the outer side surface of the pole piece of the commutator (2) is 90 degrees.

5. The carbon crystal and commutator mating structure of an electric machine according to claim 1, wherein: the carbon crystal (3) and the motor end cover (1) are connected in an interference fit mode.

6. The carbon crystal and commutator mating structure of an electric machine according to claim 1, wherein: the carbon crystal (3) is connected with a lead (4).