CN210053288U

CN210053288U - Direct current motor

Info

Publication number: CN210053288U
Application number: CN201921189022.1U
Authority: CN
Inventors: 陈卫新; 顾海连; 沈先龙; 林少平
Original assignee: Zhejiang Meiyin Motor Co Ltd
Current assignee: Zhejiang Meiyin Motor Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-02-11
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a direct current motor, which comprises a cavity enclosed by an iron cylinder (10), a front end cover (20) and a rear end cover (30), wherein the inner wall of the cavity is provided with a magnet (11), a rotor (40) is arranged in the cavity, the rotor (40) is provided with a commutator (41), the rear end cover (30) is provided with a brush frame plate (31) matched with the commutator (41), the front end cover (20) and the rear end cover (30) are provided with radiating holes (21), and the inner side of the front end cover (20) is provided with a filter screen (22); the brush holder plate (31) shields the heat dissipation holes (21) in the axial direction, the brush holder plate (31) is provided with a brush box (32), and the side wall of the brush box (32) is provided with an inspection groove (33). The utility model has the characteristics of carbon brush structure is convenient overhauls and is maintained and the relative great of louvre area, the utility model discloses can stable work for a long time.

Description

Direct current motor

Technical Field

The utility model relates to a direct current motor, especially a direct current motor that stability is good.

Background

The motor is an indispensable important device in industrial production and daily life. The motor is various in types, wherein the direct current motor mainly comprises a rotor with a winding, a shell stator with a magnet and a reversing component. The commutation component mainly plays a role in guiding current into the rotor winding to realize periodic current direction change. The main body of the commutation component is a commutator on the rotor and a carbon brush on the stator. The stationary carbon brushes are worn out by contact with the rotating commutator and therefore need to be replaced periodically. In the existing direct current motor, a brush box containing a carbon brush and a spring is generally arranged on a brush frame plate, the brush frame plate is fixed with a stator, and the brush box and the brush frame plate are generally of an integrated structure. Although the structure is convenient for manufacturing, the brush box is easy to be built-in, the whole brush frame plate needs to be disassembled when the carbon brush is assembled or replaced in the later period, on the contrary, the trouble is caused, and the line on the brush frame plate can also be loosened. During maintenance, an operator cannot visually judge whether the carbon brush is worn to be replaced. For motors working for long periods of time, a well-contacted carbon brush is on the one hand and efficient heat dissipation is on the other hand. Since the resistance of the winding wire is inevitable, the motor generates heat when operating. The area of a heat dissipation hole of the existing direct current motor is generally small, if the direct current motor works for a long time, heat dissipation and heat generation are unbalanced, the problems of discharge or short circuit and the like caused by overheat failure of a winding wire paint film easily occur, and the working condition of the motor is influenced.

Therefore, the existing direct current motor has the problems that the carbon brush structure is not beneficial to maintenance and repair, the area of the radiating hole is relatively small, and the long-time stable work is difficult.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a direct current motor. The utility model has the characteristics of carbon brush structure is convenient overhauls and is maintained and the relative great of louvre area, the utility model discloses can stable work for a long time.

The technical scheme of the utility model: a direct current motor comprises a cavity enclosed by an iron cylinder, a front end cover and a rear end cover, wherein a magnet is arranged on the inner wall of the cavity, a rotor is arranged in the cavity, a commutator is arranged on the rotor, a brush holder plate matched with the commutator is arranged on the rear end cover, heat dissipation holes are formed in the front end cover and the rear end cover, and a filter screen is arranged on the inner side of the front end cover; the brush holder plate shields the heat dissipation holes in the axial direction, the brush holder plate is provided with a brush box, and the side wall of the brush box is provided with an inspection groove.

In the aforementioned dc motor, the brush holder plate is provided with a secondary air hole.

In the foregoing dc motor, the brush holder plate is provided with the insertion hole, and the bottom of the brush box is provided with the insertion piece matched with the insertion hole.

In the aforementioned dc motor, the brush box is provided with a support lug.

In the aforementioned dc motor, a positioning clip is disposed on an inner wall of the iron cylinder.

Compared with the prior art, the utility model discloses a louvre on front end housing and the rear end cap forms the wind channel of a circulation, forms good heat dissipation from this, and the front end housing has the filter screen moreover, and rear end housing department brush yoke plate forms indirect wind channel, and two places can both be dustproof, improve the job stabilization nature of motor. And simultaneously, the utility model discloses a have and inspect the groove, maintenance person can judge the wearing and tearing condition of carbon brush according to inspecting the groove directly perceivedly on the one hand, and on the other hand can utilize the instrument to support the spring through inspecting the groove and change the carbon brush when changing the carbon brush, need not disassemble brush yoke board whole, and it is more convenient to operate.

Furthermore, the structure of the inserting piece enables the production and the assembly of the brush box to be relatively simple, and the support lug facilitates the connection of the brush box and the outside.

To sum up, the utility model has the characteristics of carbon brush structure is convenient overhauls and is maintained and the relative great of louvre area, the utility model discloses can stable work for a long time.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a three-dimensional schematic view of the present invention;

fig. 3 is a schematic structural view of the brush holder plate.

Reference numerals: 10-iron cylinder, 11-magnet, 12-locator card, 20-front end cover, 21-heat dissipation hole, 22-filter screen, 30-rear end cover, 31-brush holder plate, 32-brush box, 33-inspection groove, 34-secondary air hole, 35-jack, 36-insert, 37-support lug, 40-rotor, 41-commutator.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended as a limitation to the present invention.

Example (b): a direct current motor comprises a cavity enclosed by an iron cylinder 10, a front end cover 20 and a rear end cover 30, wherein a magnet 11 is arranged on the inner wall of the cavity, a rotor 40 is arranged in the cavity, a commutator 41 is arranged on the rotor 40, a brush holder plate 31 matched with the commutator 41 is arranged on the rear end cover 30, heat dissipation holes 21 are formed in the front end cover 20 and the rear end cover 30, and a filter screen 22 is arranged on the inner side of the front end cover 20; the brush holder plate 31 axially shields the heat dissipation holes 21, a brush box 32 is arranged on the brush holder plate 31, and an inspection groove 33 is arranged on the side wall of the brush box 32.

The brush holder plate 31 is provided with a secondary air hole 34. The brush holder plate 31 is provided with a jack 35, and the bottom of the brush box 32 is provided with an insert piece 36 matched with the jack 35. The brush box 32 is provided with a support lug 37.

And a positioning clamp 12 is arranged on the inner wall of the iron cylinder 10.

When in work: the utility model discloses a louvre 21 on front end housing 20 and the rear end cap 30 forms the wind channel of a circulation, forms good heat dissipation from this, and front end housing 20 has filter screen 22 moreover, and rear end cap 30 department brush yoke board 31 forms indirect wind channel, and two can both prevent dust, improve the job stabilization nature of motor.

As shown in fig. 3, the brush box has an inspection groove 33, so that a maintenance worker can visually determine the wear of the carbon brush according to the inspection groove 33. On the other hand, the carbon brush and the spring are axially arranged in the brush box, when the carbon brush is replaced, a tool can be used for abutting against the spring to be replaced through the inspection groove 33, the brush frame plate does not need to be completely detached, and the operation is more convenient.

The configuration of the tabs 36 allows for relatively simple manufacture and assembly of the brush box 32, and the lugs 37 facilitate connection of the brush box 32 to an external source.

Claims

1. The utility model provides a direct current motor, includes the cavity that is enclosed by iron drum (10), front end housing (20) and rear end cap (30), and the cavity inner wall is equipped with magnet (11), is equipped with rotor (40) in the cavity, is equipped with commutator (41) on rotor (40), is equipped with on rear end cap (30) with commutator (41) complex brush frame board (31), its characterized in that: the front end cover (20) and the rear end cover (30) are provided with heat dissipation holes (21), and the inner side of the front end cover (20) is provided with a filter screen (22); the brush holder plate (31) shields the heat dissipation holes (21) in the axial direction, the brush holder plate (31) is provided with a brush box (32), and the side wall of the brush box (32) is provided with an inspection groove (33).

2. A direct current motor according to claim 1, characterized in that: and a secondary air hole (34) is formed in the brush frame plate (31).

3. A direct current motor according to claim 1, characterized in that: be equipped with jack (35) on brush frame board (31), the bottom of brush box (32) is equipped with and jack (35) complex inserted sheet (36).

4. A direct current motor according to claim 1, characterized in that: the brush box (32) is provided with a support lug (37).

5. A direct current motor according to claim 1, characterized in that: and a positioning clamp (12) is arranged on the inner wall of the iron cylinder (10).