CN220874363U

CN220874363U - Micro-motor end cover

Info

Publication number: CN220874363U
Application number: CN202322656277.7U
Authority: CN
Inventors: 陈少雄; 林吉跃; 张彦志; 李喆演; 陈超勇; 张旭清; 胡淑华
Original assignee: Shantou City Jiali Micro Motor Co ltd
Current assignee: Shantou City Jiali Micro Motor Co ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-04-30
Anticipated expiration: 2033-09-28

Abstract

The utility model relates to a micro-motor end cover, which comprises an end cover body and two electric brushes, wherein the two electric brushes are arranged on the inner side of the end cover body and are oppositely arranged, and the micro-motor end cover is characterized in that: a metal supporting plate is arranged at the bottom of the end cover body; the micro-motor end cover further comprises two capacitors, the two capacitors are in one-to-one correspondence with the two electric brushes, a first pin of each capacitor is electrically connected with the metal support plate, and a second pin of each capacitor is electrically connected with the corresponding electric brush. The micro motor end cover can enable the micro motor to have certain anti-interference capability, so that the micro motor cannot be influenced by the change of the working environment.

Description

Micro-motor end cover

Technical Field

The utility model relates to the technical field of micro motors, in particular to a micro motor end cover.

Background

Micro-motors, i.e. micro-motors, refer to motors with diameters less than 160mm or rated powers less than 750mW, typically powered by a battery. Micro-motors are commonly used in control systems or driven mechanical loads to perform functions such as detection, analysis, amplification, execution, or conversion of electromechanical signals or energy.

The micro motor generally comprises a shell, an end cover, a rotor and a stator arranged on the inner side wall of the shell, wherein the stator is generally composed of two magnetic sheets with opposite polarities, a power connector is arranged on the outer side surface of the end cover, and an electric brush connected with the power connector is arranged on the inner side surface of the end cover; the rotor comprises a rotating shaft, an iron core, a coil winding and a commutator, wherein the iron core is generally formed by a plurality of iron core pieces, the iron core pieces are connected to the middle part of the rotating shaft through connecting blocks, the coil winding is wound on the connecting blocks between the iron core pieces and the rotating shaft, and the commutator is arranged at the rear end of the rotating shaft. The end cover not only plays a role in connecting and positioning the support bearing and the shell, but also plays a role in sealing the whole motor.

In actual operation, since the micro-motor is in a relatively complex working environment, the micro-motor is inevitably interfered by electrical signals from other electrical components, for example, the control circuit of the micro-motor receives an error signal to perform false triggering, or abnormal overvoltage and the like on the circuit are also frequently generated. If the micro motor is interfered by other electric signals for a long time, the work of the whole circuit is adversely affected, and the service life of the motor is also reduced. In order to prevent the micro motor from being interfered by an external circuit, an anti-interference circuit is generally additionally arranged outside the micro motor at present, but a certain degree of inconvenience is caused to a user.

Disclosure of utility model

The technical problem to be solved by the utility model is to provide the micro motor end cover, which can enable the micro motor to have certain anti-interference capability, prevent the micro motor from being influenced by the change of the working environment and improve the stability of the micro motor. The technical scheme adopted is as follows:

the utility model provides a micromotor end cover, includes end cover body and two brushes, and two brushes are all installed in the inboard of end cover body and both set up relatively, its characterized in that: a metal supporting plate is arranged at the bottom of the end cover body; the micro-motor end cover further comprises two capacitors, the two capacitors are in one-to-one correspondence with the two electric brushes, a first pin of each capacitor is electrically connected with the metal support plate, and a second pin of each capacitor is electrically connected with the corresponding electric brush.

This kind of micromotor end cover is through setting up metal support plate and two electric capacities on the end cover body to be connected with metal support plate, brush respectively with two pins of electric capacity, be that the electric capacity is connected between ground wire (metal support plate) and brush promptly, the electric capacity can avoid the mutual coupling interference of circuit, prevents that interference signal from influencing the normal operating of rotor, can make the micromotor possess certain interference killing feature after the end cover assembly, and simple structure makes the micromotor can not receive operational environment to change the influence, can improve the stability of micromotor.

As a preferable scheme of the utility model, two symmetrical electric brush positioning grooves are arranged on the inner side of the end cover body; the electric brush comprises an L-shaped metal spring plate and a carbon brush block, wherein the carbon brush block is arranged on the inner side surface of a long arm of the L-shaped metal spring plate, and a short arm of the L-shaped metal spring plate is arranged in a corresponding electric brush positioning groove as a fixed end of the electric brush; the carbon brush blocks of the two brushes are oppositely arranged.

As a further preferable mode of the utility model, a bending angle of 35-45 degrees is formed between the short arm and the long arm of the electric brush. The short arm and the long arm of the electric brushes are arranged at an angle of 35-45 degrees, so that the long arms of the two electric brushes have a tendency to clamp towards the middle, and good electric conduction performance is ensured.

As a further preferable scheme of the utility model, the middle part of the end cover body is provided with a shaft hole, both sides of the end cover body are provided with square bulges, pin slots are arranged in the square bulges, and the micro-motor end cover also comprises two pins which are respectively positioned in the corresponding pin slots and are connected with short arms of the corresponding L-shaped metal spring plates. The structure ensures that the matching between the motor shaft and the shaft hole is more stable and reliable, the shaft hole is formed by fine grinding of high-quality materials, the contact surface of the motor shaft and the shaft hole is smoother, and the friction force is reduced to be extremely low.

As a further preferable scheme of the utility model, the middle part of the metal supporting plate is provided with a circular boss matched with the shaft hole.

Compared with the prior art, the utility model has the following advantages:

This kind of micromotor end cover is through setting up metal support plate and two electric capacities on the end cover body to be connected with metal support plate, brush electricity respectively with two pins of electric capacity, the electric capacity can avoid the mutual coupling interference of circuit, prevents that interference signal from influencing the normal operation of rotor, can make the micromotor possess certain interference killing feature after the end cover assembly, simple structure makes the micromotor can not receive operational environment to change the influence moreover, can improve the stability of micromotor.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of the present utility model.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a bottom view of fig. 1.

Detailed Description

As shown in fig. 1-3, the micro-motor end cover comprises an end cover body 1, two electric brushes 2 and two capacitors 3, wherein the two electric brushes 2 are arranged on the inner side of the end cover body 1 and are oppositely arranged, and a metal supporting plate 11 is arranged at the bottom of the end cover body 1; the two capacitors 3 are in one-to-one correspondence with the two brushes 2, the first pins 31 of the capacitors 3 are electrically connected with the metal support plate 11, and the second pins 32 of the capacitors 3 are electrically connected with the corresponding brushes 2.

In the embodiment, two symmetrical brush positioning grooves 12 are arranged on the inner side of the end cover body 1; the electric brush 2 comprises an L-shaped metal spring piece 21 and a carbon brush block 22, wherein the carbon brush block 22 is arranged on the inner side surface of a long arm 211 of the L-shaped metal spring piece 21, and a short arm 212 of the L-shaped metal spring piece 21 is arranged in a corresponding electric brush positioning groove 12 as a fixed end of the electric brush 2; the carbon brush blocks 22 of the two brushes 2 are disposed opposite to each other.

In the present embodiment, a 45 ° bend angle is formed between the short arm 212 and the long arm 211 of the brush 2. By providing the short arm 212 and the long arm 211 of the brushes 2 with a 45 degree bend angle, the long arms 211 of the two brushes 2 have a tendency to sandwich therebetween, ensuring good electrical conductivity.

In the embodiment, the middle part of the end cover body 1 is provided with a shaft hole 13, and the middle part of the metal support plate 11 is provided with a circular boss 14 matched with the shaft hole 13; the both sides of end cover body 1 are provided with square protruding 15, are equipped with pin slot 151 in the square protruding 15, micromotor end cover still includes two pins 4, and two pins 4 are in corresponding pin slot 151 respectively and are connected with the short arm 212 of corresponding L type metal shrapnel 21. The structure ensures that the matching between the motor shaft and the shaft hole 13 is more stable and reliable, the shaft hole 13 is formed by fine grinding of high-quality materials, the contact surface between the motor shaft and the shaft hole 13 is smoother, and the friction force is reduced to be extremely low.

In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present utility model are included in the protection scope of the present utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a micromotor end cover, includes end cover body and two brushes, and two brushes are all installed in the inboard of end cover body and both set up relatively, its characterized in that: a metal supporting plate is arranged at the bottom of the end cover body; the micro-motor end cover further comprises two capacitors, the two capacitors are in one-to-one correspondence with the two electric brushes, a first pin of each capacitor is electrically connected with the metal support plate, and a second pin of each capacitor is electrically connected with the corresponding electric brush.

2. A micro-machine end cap according to claim 1, wherein: two symmetrical electric brush positioning grooves are formed in the inner side of the end cover body; the electric brush comprises an L-shaped metal spring plate and a carbon brush block, wherein the carbon brush block is arranged on the inner side surface of a long arm of the L-shaped metal spring plate, and a short arm of the L-shaped metal spring plate is arranged in a corresponding electric brush positioning groove as a fixed end of the electric brush; the carbon brush blocks of the two brushes are oppositely arranged.

3. A micro-machine end cap according to claim 2, wherein: an angle of 35-45 degrees is formed between the short arm and the long arm of the electric brush.

4. A micro-machine end cap according to claim 3, wherein: the micro-motor end cover comprises an end cover body and is characterized in that a shaft hole is formed in the middle of the end cover body, square protrusions are arranged on two sides of the end cover body, pin slots are formed in the square protrusions, the micro-motor end cover further comprises two pins which are respectively located in the corresponding pin slots and are connected with short arms of corresponding L-shaped metal elastic sheets.

5. A micro-machine end cap according to claim 4, wherein: the middle part of the metal supporting plate is provided with a circular boss matched with the shaft hole.