Micromotor

Abstract

The utility model provides a micromotor, which comprises a shell, a group of carbon brushes, an armature, a commutator, a permanent magnet and an output shaft, one end of the commutator is electrically connected to the armature, and the other end of the commutator is fixedly connected to the output shaft; the two sides of the commutator are respectively and oppositely provided with a carbon brush. The armature is wrapped by the shell; a group of opposite permanent magnets are arranged on the inner wall of the shell; a preset distance is arranged between the opposite permanent magnets; the output shaft penetrates out of the shell and extends out by a preset distance. The service life is effectively prolonged, and the operation noise is reduced through the arrangement of the narrow groove, so that the service life of the micromotor is long.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a micro motor. Background Technology

[0002] With the development of the times, motors have been continuously miniaturized from large to small and are increasingly used in various scenarios, such as industrial machinery, medical equipment, home appliances and electric toys.

[0003] Existing micro motors use gear transmission for torque output and the motor housing is made of metal.

[0004] However, ordinary gears have a simple structure and output too little torque. Under the cover of the motor housing, they experience significant wear during operation, which produces noise and affects their lifespan. Utility Model Content

[0005] In view of the above problems, this utility model is proposed to provide a micro motor that overcomes or at least partially solves the above problems.

[0006] To address the aforementioned problems, this utility model discloses a micro motor, comprising: a housing, a set of carbon brushes, an armature, a commutator, permanent magnets, and an output shaft; one end of the commutator is electrically connected to the armature, and the other end is fixedly connected to the output shaft; a carbon brush is respectively arranged opposite to one side of the commutator; the housing encloses the armature; a set of opposing permanent magnets is arranged on the inner wall of the housing; the spacing between the opposing permanent magnets is set at a preset distance; the output shaft extends out of the housing by a preset distance.

[0007] Furthermore, the armature is composed of several copper bars electrically connected to the commutator.

[0008] Furthermore, the housing includes a shell and a chassis; the shell and chassis are detachably connected; the shell encloses the armature; a set of opposing permanent magnets are provided on the inner wall of the shell; a narrow groove is provided on the inner wall of the shell, and the armature is disposed in the narrow groove; the output shaft extends out of the shell and extends a predetermined distance.

[0009] Furthermore, the housing is a hollow cylinder with one end not sealed; the chassis is a disc.

[0010] Furthermore, the set of brushes is electrically connected to the wires used for power supply.

[0011] This utility model has the following advantages:

[0012] By setting narrow slots, the rotor of the motor operates with lower noise and greater force, resulting in a faster rotor speed. The addition of copper strips provides high toughness, excellent electrical and thermal conductivity, thus extending the lifespan of the micromotor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of one embodiment of a micro motor according to the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of one embodiment of a micro motor according to the present invention.

[0015] In the diagram: 1. Housing; 2. Carbon brush; 3. Armature; 4. Commutator; 5. Permanent magnet; 6. Output shaft; 11. Housing; 12. Chassis. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] Reference Figure 1 and Figure 2 This diagram illustrates the structure of a micro motor according to the present invention, which specifically includes: a housing 1, a set of carbon brushes 2, an armature 3, a commutator 4, a permanent magnet 5, and an output shaft 6. One end of the commutator is electrically connected to both ends of the armature, and the other end is fixedly connected to the output shaft. A carbon brush 2 is respectively arranged opposite to one side of the commutator 4. The housing 1 encloses the armature 3. A set of opposing permanent magnets 5 is arranged on the inner wall of the housing 1. The spacing between the opposing permanent magnets 5 is set at a preset distance. The output shaft extends out of the housing by a preset distance. It should be noted that the housing 1 is used to protect the various components, and the set of carbon brushes 2 is used to energize the commutator 4 and the armature 3. When the armature 3 is energized, it forms an electromagnet, which can rotate under the action of the permanent magnets 5 located outside the armature 3. It should also be noted that the armature 3 and the commutator 4 are electrically connected and fixedly connected, thereby driving the commutator 4 to rotate. The commutator 4 then drives the output shaft 6 to rotate, so the torque of the commutator 4 is the output torque.

[0019] Furthermore, the spacing between the opposing permanent magnets 5 is set at a preset distance to form a narrow slot. The design of the narrow slot prevents the armature 3 from easily touching the ground when it rotates under power, thus avoiding noise. On the other hand, the narrow slot allows the magnetic field generated by the permanent magnets 5 to be sufficiently large, resulting in a sufficiently large magnetic force on the armature 4, which further enables the armature 3 to rotate and generate greater torque.

[0020] Furthermore, the function of the set of carbon brushes 2 is to transmit current from the power source to the armature 3 and the commutator 4, and simultaneously participate in the magnetic flux cutting between the armature 3 and the permanent magnet 5 to realize the rotational motion of the motor. Carbon brushes are used because motor carbon brushes are mainly made of carbon graphite material, which has high conductivity and wear resistance. It typically consists of several to dozens of carbon brush blocks, each composed of carbon graphite material and metal material. The carbon brush blocks contact the slip ring surface on the motor rotor, transmitting current from the power source to the motor rotor.

[0021] Example 2

[0022] Reference Figure 1 and Figure 2 This diagram illustrates the structure of a micro motor according to the present invention, which specifically includes: a housing 1, a set of carbon brushes 2, an armature 3, a commutator 4, a permanent magnet 5, and an output shaft 6. One end of the commutator is electrically connected to both ends of the armature, and the other end is fixedly connected to the output shaft. A carbon brush 2 is respectively arranged opposite to one side of the commutator 4. The housing 1 encloses the armature 3. A set of opposing permanent magnets 5 is arranged on the inner wall of the housing 1. The spacing between the opposing permanent magnets 5 is set at a preset distance. The output shaft extends out of the housing by a preset distance. It should be noted that the housing 1 is used to protect the various components, and the set of carbon brushes 2 is used to energize the commutator 4 and the armature 3. When the armature 3 is energized, it forms an electromagnet, which can rotate under the action of the permanent magnets 5 located outside the armature 3. It should also be noted that the armature 3 and the commutator 4 are electrically connected and fixedly connected, thereby driving the commutator 4 to rotate. The commutator 4 then drives the output shaft 6 to rotate, so the torque of the commutator 4 is the output torque.

[0023] Furthermore, the spacing between the opposing permanent magnets 5 is set at a preset distance to form a narrow slot. The design of the narrow slot prevents the armature 3 from easily touching the ground when it rotates under power, thus avoiding noise. On the other hand, the narrow slot allows the magnetic field generated by the permanent magnets 5 to be sufficiently large, resulting in a sufficiently large magnetic force on the armature 4, which further enables the armature 3 to rotate and generate greater torque.

[0024] Furthermore, the function of the set of carbon brushes 2 is to transmit current from the power source to the armature 3 and the commutator 4, and simultaneously participate in the magnetic flux cutting between the armature 3 and the permanent magnet 5 to realize the rotational motion of the motor. Carbon brushes are used because motor carbon brushes are mainly made of carbon graphite material, which has high conductivity and wear resistance. It typically consists of several to dozens of carbon brush blocks, each composed of carbon graphite material and metal material. The carbon brush blocks contact the slip ring surface on the motor rotor, transmitting current from the power source to the motor rotor.

[0025] Furthermore, the armature 3 is composed of several copper bars electrically connected to the commutator 4. The copper bars have excellent conductivity, generate little heat, and have low resistance. Low resistance allows the current in the circuit of the armature 3 to closely approximate the actual input current, resulting in less loss and thus a larger magnetic field force, generating a larger torque and consequently a larger output torque. The copper bars also have good flexibility; when installed inside the housing 1, they can be bent and installed within the housing 1, and they will not easily break after multiple rotations.

[0026] Furthermore, the outer casing 1 includes a housing 11 and a chassis 12; the housing 11 and chassis 12 are detachably connected; the housing 11 encloses the armature 3; a set of opposing permanent magnets 5 are provided on the inner wall of the housing 11; a narrow groove is provided on the inner wall of the housing 11, and the armature 3 is disposed in the narrow groove; the output shaft 6 extends out of the housing 11 by a predetermined distance. It should be noted that, for ease of installation, the housing 11 and chassis 12 are detachably connected, allowing the various components to be disposed inside the housing 11. After assembly, the chassis 12 is then connected to the bottom of the housing 11. For the installation and use of the micro motor, multiple threaded holes are provided at the end of the output shaft 6 protruding from the housing 11 for convenient installation in actual use.

[0027] Furthermore, the housing 11 is a hollow cylinder with one end not sealed; the chassis 12 is a disc. It should be noted that providing a hollow cylinder with one end not sealed is the most economical way to protect all components.

[0028] Furthermore, the set of brushes 2 are electrically connected to the power supply wires. It should be noted that the brushes 2 abut against the commutator 4. The electricity from the power center and transmitted through the wires passes through one of the brushes 2, then through the commutator 4 to the armature 3, then to the other brush 2, and finally back to the power center through the wires, forming a circuit.

[0029] Furthermore, its working principle is as follows: when the micro motor is powered on, the armature 3 is equivalent to an electromagnet and is located in the magnetic field formed by the permanent magnet 5. The electrodes of the permanent magnet 5 remain unchanged, and the armature 3 is subjected to the magnetic field and rotates. The armature 3 is composed of several copper bars electrically connected to the commutator, and the force it receives is the superposition of the forces received by several copper bars, thereby achieving a larger output torque.

[0030] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0031] The micro motor provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A micro motor, characterized in that, include: The components include: housing, a set of carbon brushes, armature, commutator, permanent magnet, and output shaft. One end of the commutator is electrically connected to the armature, and the other end is fixedly connected to the output shaft; A carbon brush is disposed on each side of the commutator. The outer casing encloses the armature; A set of opposing permanent magnets is provided on the inner wall of the outer casing; The spacing between the opposing permanent magnets is set at a preset distance; The output shaft extends out of the housing by a predetermined distance.

2. The micro motor according to claim 1, characterized in that, The armature is composed of several copper bars electrically connected to the commutator.

3. The micro motor according to claim 1, characterized in that, The outer casing includes a housing and a chassis; The outer shell and chassis are detachably connected; The housing encloses the armature; A set of opposing permanent magnets is provided on the inner wall of the housing; The inner wall of the housing is provided with a narrow groove, and the armature is disposed in the narrow groove; The output shaft extends out of the housing by a predetermined distance.

4. The micro motor according to claim 3, characterized in that, The shell is a hollow cylinder with one end not sealed; The chassis is a disc.

5. The micro motor according to claim 1, characterized in that, The set of brushes are electrically connected to the wires used for power supply.

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