CN200994100Y

CN200994100Y - Miniature DC motor

Info

Publication number: CN200994100Y
Application number: CNU2006201663296U
Authority: CN
Inventors: 钱士祥
Original assignee: 钱士祥
Current assignee: CIXI CITY LESHI ELECTRIC MACHINE ELECTRIC APPLIANCE CO., LTD.
Priority date: 2006-12-30
Filing date: 2006-12-30
Publication date: 2007-12-19
Anticipated expiration: 2016-12-30

Abstract

The utility model relates to a mini direct-current motor comprising a rear cover and a brush, which is characterized in a plurality of accommodation spaces are provided inside the rear cover. These spaces include spaces for accommodating bridge rectifiers and are provided with terminal holes and spaces for accommodating capacitances as well as spaces for accommodating inductor and spaces for accommodating fixing socket for brush. A protrusion of a pillar is respectively arranged and a spring is cased at both left and right sides of central hollow. At left and right sides of the rear cover, a groove is provided. Brushes are respectively arranged inside the fixing socket of the brushes, wherein, input terminal of the bridge rectifier is connected with lead wire through the terminal hole and output terminal is connected with the left and right capacitances as well as a foot of an inductor, meanwhile, the other foot of inductor is connected with one end of left and right spring, and is connected with the left and right fixing sockets of brushes. The other foot of capacitance is clamped and arranged between metal case of motor and the rear cover through left and right flute. The other end of spring respectively contacts the left and right brushes. The bridge rectifier, capacitance and inductor are fixed inside the rear cover with hot melt glue. The motor can directly be connected with AC supply to decrease electrical noise and integrates electrical components with motor; therefore, the utility model is characterized in good performance of contact and practicability.

Description

DC micromotor

Technical field

The utility model relates to a kind of direct current machine, the DC micromotor of low, the built-in electric capacity of particularly a kind of noise, inductance and rectification circuit.

Background technology

Micromachine develops into the situation of today, the America and Europe and the whole world are improving year by year to the EMC class requirement of motor, existing common electric machine can produce interference near electronic equipment or instrument in the running, electric noise is bigger, is simultaneously remaining further to be improved aspect small-sized, simple and easy, the lightweight of pursuing motor and the good looking appearance.

In view of this, in order to address the above problem, this creator is according to oneself practical experience and technical concept, after deliberation, exploitation, and has the utility model to produce eventually.

The utility model content

The utility model is that a kind of DC micromotor will be provided, and makes it reduce the electric noise of motor, directly use external AC power supply and realize the technical problem of electronic devices and components and motor integration with solution.

It is such solving the problems of the technologies described above the technical scheme that is adopted:

A kind of DC micromotor, include the bonnet and the brush of motor, it is characterized in that: be provided with a plurality of spatial accommodations in the bonnet of this motor, include the upper space of center hole top, the electric capacity spatial accommodation of center hole left and right side, inductance spatial accommodation and brush fixed cover spatial accommodation; Wherein offer two terminal holes in the upper space, the center hole left and right side is provided with projection, and the left and right side of bonnet offers groove;

Be equiped with rectifier bridge in this upper space, a left side, right electric capacity spatial accommodation is equiped with electric capacity respectively, a left side, right inductance spatial accommodation is equiped with inductance respectively, a left side, right brush fixed cover spatial accommodation is equiped with the brush fixed cover respectively, a left side, be equiped with brush respectively in the right brush fixed cover, a left side, right projection is arranged with spring respectively, wherein, the input of rectifier bridge is welded to connect by two terminal holes and power lead, the output of rectifier bridge respectively with a left side, a right electric capacity and a pin of inductance are welded to connect, a left side, another pin of right inductance respectively with a left side, one end and the left side of right spring, right brush fixed cover welds together, a left side, another pin of right electric capacity is respectively by a left side, right groove is located between motor metal shell and the bonnet, form electric capacity good earth state, a left side, the other end of right spring contacts respectively and presses a left side, right brush;

This rectifier bridge, electric capacity, inductance are fixed in the bonnet with hot melt adhesive; The bonnet of motor is a plastic material.

The utility model has been installed rectification circuit in the motor bonnet, can direct external alternating current 220V power supply when the user uses this direct current machine; The inductance of set ground capacity and power input serial connection on the earth connection of motor can reduce the electric noise of motor; This motor uses a kind of spring to oppress brush and to the motor energising, brush contacts with rotor; Perforation spatial accommodation in the special plastic bonnet that motor is set up, can and press the built-in installation of spring with electric capacity, inductance, rectification circuit, do not increase overall dimension and volume, keep the motor profile neat and artistic, make it reduce the electric noise of motor, directly use external AC power supply and realize the technical problem of electronic devices and components and motor integration thereby solved.

The utility model is simple in structure, and its advantage is as follows:

1, the utility model is introduced rectification circuit, can directly use external AC power supply, convenient safety again.

2, the utility model is set up electric capacity and inductance, reduces the electric noise of motor and equipment or instrument are produced interference, has protected operational environment.

3, the utility model is set up special-purpose bonnet, and electronic devices and components are built-in, realizes the integrated of electronic devices and components and motor, and volume is little, profile is neat and artistic.

4, the utility model is with spring compressing brush and to the motor energising, and contact is good, and the tool practicality.

Description of drawings

Fig. 1 is an external structure schematic diagram of the present utility model.

Fig. 2 is a rear cover structure schematic diagram of the present utility model.

Fig. 3 is an A-A cutaway view among Fig. 2.

Fig. 4 assembles each component structural schematic diagram for bonnet of the present utility model.

Fig. 5 is the utility model circuit diagram.

Embodiment

As shown in Figure 1, 2, 3, be external structure of the present utility model and rear cover structure schematic diagram, this DC micromotor 30, include the bonnet 31 and the brush 20,21 (as shown in Figure 4) of motor 30, wherein, be provided with a plurality of spatial accommodations in the bonnet 31 of this motor 30, include the upper space 9 of center hole 10 tops, the electric capacity

spatial accommodation

7,8 of center hole 10 left and right sides, the inductance

spatial accommodation

5,6 of center hole 10 left and right sides and the brush fixed cover

spatial accommodation

3,4 of center hole 10 left and right sides; Wherein offer two terminal holes 24 in the upper space 9, center hole 10 left and right sides are provided with

projection

1,2, and bonnet 31 left and right sides offer

groove

22,23;

As shown in Figure 4, be equiped with rectifier bridge 19 in this upper space 9, a left side, right electric capacity

spatial accommodation

7,8 are equiped with electric capacity 17 respectively, 18, a left side, right inductance

spatial accommodation

5,6 are equiped with inductance 15 respectively, 16, a left side, right brush fixed cover

spatial accommodation

3,4 are equiped with brush fixed cover 13 respectively, 14, a left side, right brush fixed cover 13, be equiped with brush 20 in 14 respectively, 21, a left side,

right projection

1,2 are arranged with spring 11 respectively, 12, wherein, the input 191 of rectifier bridge 19 is welded to connect by two terminal holes 24 and power lead 25, the output 192 of rectifier bridge 19 respectively with a left side, right

electric capacity

17,18 and inductance 15, a pin of 16 is welded to connect, a left side, right inductance 15, another pin of 16 respectively with a left side, right spring 11, an end and a left side of 12, right brush fixed

cover

13,14 weld together, a left side, right electric capacity 17, another pin of 18 is respectively by a left side,

right groove

22,23 are located between motor 30 metal shells and the bonnet 31, form electric capacity good earth state, a left side,

right spring

11,12 the other end contacts respectively and presses a left side,

right brush

20,21;

This rectifier bridge 19, left and right sides

electric capacity

17,18, left and

right sides inductance

15,16 are fixed in the bonnet 31 with hot melt adhesive, and the bonnet 31 of motor 30 is a plastic material.

As shown in Figure 5, it is the circuit diagram that reduces the electric dry sound of micromachine 30, external communication 220V power supply inserts by power lead 25, be rectified into DC power supply through rectifier bridge 19, at the positive level of DC power supply and the negative level

end inductance coil

15,16 of having connected respectively, reduce the electric noise of motor 30; Go into ground capacity 17,18 (earth point is the metal shell of motor 30) in positive level of DC power supply and negative level termination simultaneously, also be used for reducing the electric noise of motor.

In sum, the utility model has promoted the use effect, has practicality, meets each important document of utility model patent, so propose utility application in accordance with the law.

Claims

1, a kind of DC micromotor, include the bonnet and the brush of motor, it is characterized in that: be provided with a plurality of spatial accommodations in the bonnet of this motor, include the upper space of center hole top, the electric capacity spatial accommodation of center hole left and right side, inductance spatial accommodation and brush fixed cover spatial accommodation; Wherein offer two terminal holes in the upper space, the center hole left and right side is provided with projection, and the left and right side of bonnet offers groove;

Be equiped with rectifier bridge in this upper space, a left side, right electric capacity spatial accommodation is equiped with electric capacity respectively, a left side, right inductance spatial accommodation is equiped with inductance respectively, a left side, right brush fixed cover spatial accommodation is equiped with the brush fixed cover respectively, a left side, be equiped with brush respectively in the right brush fixed cover, a left side, right projection is arranged with spring respectively, wherein, the input of rectifier bridge is welded to connect by two terminal holes and power lead, the output of rectifier bridge respectively with a left side, a right electric capacity and a pin of inductance are welded to connect, a left side, another pin of right inductance respectively with a left side, one end and the left side of right spring, right brush fixed cover welds together, a left side, another pin of right electric capacity is respectively by a left side, right groove is located between motor metal shell and the bonnet, form electric capacity good earth state, a left side, the other end of right spring contacts respectively and presses a left side, right brush.

2, DC micromotor according to claim 1 is characterized in that: this rectifier bridge, electric capacity, inductance are fixed in the bonnet with hot melt adhesive.

3, DC micromotor according to claim 1 is characterized in that: the bonnet of this motor is a plastic material.