CN214314853U

CN214314853U - Brush carrier structure of miniature direct current motor

Info

Publication number: CN214314853U
Application number: CN202120062850.XU
Authority: CN
Inventors: 马杰
Original assignee: Suzhou Rotary Motor Co ltd
Current assignee: SUZHOU YONGJIE MOTOR CO.,LTD.
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-09-28
Anticipated expiration: 2031-01-11

Abstract

The utility model discloses a brush yoke structure of a micro direct current motor, which comprises a brush, an inductor, a brush box, a middle plate and a terminal, wherein the whole brush yoke structure is in a centrosymmetric layout, the brush and the brush box are connected by a brush whip spot welding, a spring is sleeved on the brush whip, the brush box and the inductor are electrified by welding, and the brush and the spring are both arranged in a brush box cavity on the middle plate; the inductor is arranged on one side of the electric brush; the inductor is provided with a terminal beside, and the terminal is provided with a bending fixing structure. This neotype brush yoke structure is based on solving the structural problem of motor life problem and built-in inductance capacitance simultaneously and the design produces, on brush box structural design's basis, through structural design simultaneously, lets inductance, electric capacity easily embed, the effectual RE electromagnetic radiation that has reduced.

Description

Brush carrier structure of miniature direct current motor

Technical Field

The utility model relates to a micro motor technique specifically indicates a micro DC motor's brush yoke structure.

Background

According to market demands, the service life of the direct-current brush micro motor with the diameter phi of 36 or so is required to reach more than 250H, and meanwhile, the RE test requirement of European standard EN55014 is met; the brush body length needs to be lengthened, and the motor needs to have built-in components (inductance and capacitance) for improving RE radiation.

Most of brushes of the similar motors on the market have effective lengths of only 4-5mm, the service life of 150H can be ensured, or the built-in inductor cannot be arranged on the structure, so that the requirement allowance of RE test of EN55014 is insufficient or exceeds the standard.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to solve the technical problem that overcome and can only guarantee 150H life-span among the prior art, perhaps structurally unable built-in inductance, the requirement surplus that leads to EN 55014's RE test is not enough or exceeds standard to a miniature DC motor's brush yoke structure based on solve motor life problem and built-in inductance capacitance's structural problem simultaneously and design is provided.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides a miniature DC motor's brush yoke structure which characterized in that: the brush holder is integrally arranged in a central symmetry manner, the electric brush and the brush box are connected through one end of a brush whip of the electric brush in a spot welding manner, a spring is sleeved on the brush whip of the electric brush, the brush box and the inductor are electrified through welding, the electric brush and the spring are arranged in a brush box cavity on the middle plate, the brush box and the middle plate are fixedly connected through back-off and clamping positions for front and back limiting, and the front and back limiting comprises a limiting point a and a limiting point b;

the inductor is arranged on one side of the electric brush, one end of the inductor is connected with the brush box in a welding mode through a lead, the other end of the inductor is provided with a welding position of the connecting terminal, and the welding position is connected with the capacitor element;

and a terminal hole position is arranged beside the inductor, and the terminal is bent and then connected with the fixed middle plate.

Further, the method comprises the following steps: the brush box top increase and establish the louvre, be equipped with hollow structure hole simultaneously on louvre and the medium plate and constitute the heat dissipation wind channel.

Further, the method comprises the following steps: the limiting point a is arranged on one side of the limiting point b, the limiting point b is reversely buckled and fixed on the middle plate, the limiting point a is clamped in the middle plate groove, and the bodies of the limiting point a and the limiting point b and the brush box are designed and manufactured integrally.

Further, the method comprises the following steps: the inductance and the capacitance element are welded at the welding position of the terminal at the same time.

Compared with the prior art, the utility model the advantage lie in: this neotype brush yoke structure is based on solving the structural problem of motor life problem and built-in inductance capacitance simultaneously and the design produces, on brush box structural design's basis, through structural design simultaneously, lets inductance, electric capacity easily embed, the effectual RE electromagnetic radiation that has reduced.

Drawings

In order to make the content of the invention more clearly understood, the invention will now be described in further detail with reference to specific embodiments thereof, in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural diagram of a brush holder structure of a micro dc motor.

Fig. 2 is a supplementary sectional view of a brush holder structure of a micro dc motor.

Fig. 3 is a motor circuit diagram of a brush holder structure of a micro dc motor.

Fig. 4 is a schematic view of a heat dissipation air duct in a brush holder structure of a micro dc motor.

As shown in the figure: 1. limiting points a, 2, limiting points b, 3, an inductor, 4, an electric brush, 5, a spring, 6, a brush box, 7, a middle plate, 8, terminals, 9, a capacitor, 10, a welding position, 11, a heat dissipation hole, 12 and a heat dissipation air duct.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

As shown in fig. 1 and fig. 2, the brush holder structure of a micro dc motor according to the present embodiment is characterized in that: the brush holder is structurally characterized by comprising electric brushes 4, an inductor 3, a brush box 6, a middle plate 7 and terminals 8, wherein the whole brush holder is in centrosymmetric layout, the electric brushes 4 and the brush box 6 are connected through one end of a brush whip of the electric brushes 4 in a spot welding manner, springs 5 are sleeved on the brush whip of the electric brushes 4, the brush box 6 and the inductor 3 are electrified through welding, the electric brushes 4 and the springs 5 are arranged in a cavity of the brush box 6 on the middle plate, the brush box 6 and the middle plate 7 are fixedly connected through back-off and clamping positions for front and back limiting, and the front and back limiting comprises a limiting point a1 and a limiting point b 2;

the inductor 3 is arranged on one side of the electric brush 4, one end of the inductor 3 is connected with the brush box 6 in a welding mode through a lead, the other end of the inductor 3 is provided with a welding position 10 of a connecting terminal, and the welding position 10 is connected with a capacitor 9 element;

and a terminal hole position is arranged beside the inductor 3, and the terminal 8 is bent and then connected with the fixed middle plate 7.

Meanwhile, as shown in fig. 3 and 4, the heat dissipation holes 11 are additionally formed in the top end of the brush box 6, and the heat dissipation holes 11 and the hollow structure holes formed in the middle plate 7 form a heat dissipation air duct 12, so that the temperature rise is effectively reduced, and the temperature rise of the brush box 6 can be controlled to be 30K.

The limit point b2 is provided at one end of the extension bar between the brush box 6 and the middle plate 7.

The limiting point a1 is arranged on one side of the limiting point b2, the limiting point b2 is fixed on the middle plate 7 in a reverse buckling mode, the limiting point a1 is clamped in a middle plate groove, and meanwhile the limiting point a1 and the limiting point b2 are integrally designed and manufactured with the brush box.

The inductor 3 and the capacitor 9 are welded at the welding position 10 of the terminal 8 at the same time, so that the production process is simplified.

The utility model discloses a theory of operation: this neotype brush yoke structure is based on solving motor life problem and built-in inductance and capacitance's structural problem simultaneously and the design produces, built-in brush box 6 of motor wherein, increased brush 4's length by a wide margin, motor life has been improved by a wide margin, brush box 6's structure limit point a1 in addition, limit point b 2's double-limit design, brush box position after having guaranteed the brush box assembly, the stability of motor performance has been improved, there are

electric capacity

9 and 3 position slots of inductance on the structural design of medium plate 7, as figure 3, positive negative pole respectively concatenates an inductance on the circuit, and a electric capacity of (ground connection) is connected in parallel, the radiation value of motor at the RE test has been reduced.

And terminal 8 has put together the welding position 10 of electric capacity, inductance structurally, and two electronic components can weld simultaneously, have simplified production processes, and the structural design has reserved louvre 11 on the medium plate as shown in figure 4 simultaneously, and the motor operation is along with the quick heat dissipation of radiating air duct 12, the effectual temperature rise that reduces brush and brush box.

The whole improved design of the motor brush carrier structure of the utility model can ensure the service life of the motor to reach more than 250H on the phi 36 diameter micro motor; the temperature rise of the motor is effectively reduced through the heat dissipation holes 11, and the temperature rise of the brush box 6 is controlled to be about 30K; the motor can be internally provided with an inductor 3 and a capacitor 9, and the effective margin of the motor is more than 5dB in RE 3m test under the EN55014 standard.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a miniature DC motor's brush yoke structure which characterized in that: the brush holder is characterized by comprising electric brushes (4), an inductor (3), brush boxes (6), a middle plate (7) and terminals (8), wherein the whole brush holder structure is in central symmetry layout, the electric brushes (4) and the brush boxes (6) are connected through one end of a brush whip of the electric brushes (4) in a spot welding mode, the brush whip of the electric brushes (4) is sleeved with a spring (5), the brush boxes (6) and the inductor (3) are electrified through welding, the electric brushes (4) and the spring (5) are arranged in a cavity of the brush box (6) on the middle plate, the brush boxes (6) and the middle plate (7) are fixedly connected through back-off and clamping positions for front and back limiting, and the front and back limiting positions comprise limiting points a (1) and limiting points b (2);

the inductor (3) is arranged on one side of the electric brush (4), one end of the inductor (3) is connected with the brush box (6) in a welding mode through a lead, the other end of the inductor (3) is provided with a welding position (10) of a connecting terminal, and the welding position (10) is connected with a capacitor (9) element;

and a terminal hole position is arranged beside the inductor (3), and the terminal (8) is bent and then connected with the fixed middle plate (7).

2. The brush holder structure of a micro dc motor according to claim 1, wherein: the brush box (6) top increase to open and establish louvre (11), be equipped with hollow structure hole simultaneously on louvre (11) and medium plate (7) and constitute heat dissipation wind channel (12).

3. The brush holder structure of a micro dc motor according to claim 1, wherein: limiting point a (1) locate one side of limiting point b (2), limiting point b (2) back-off is fixed on medium plate (7), and limiting point a (1) blocks in the medium plate trench simultaneously, and limiting point a (1), the body of limiting point b (2) all are made with the design of brush box an organic whole simultaneously.

4. The brush holder structure of a micro dc motor according to claim 1, wherein: the inductor (3) and the capacitor (9) are welded at the welding position (10) of the terminal (8) at the same time.