Replaceable carbon brush structure with automatic power-off protection function

Abstract

The utility model discloses a replaceable carbon brush structure with an automatic power-off protection function, which comprises a motor shell, one end of the motor shell is provided with a stator coil, one side of the stator coil is provided with a leading-out wire assembly connected with the stator coil, and the other end of the leading-out wire assembly far away from the stator coil is provided with a carbon brush assembly. A first wire connector is connected between the carbon brush assembly and the outgoing line assembly. The beneficial effects of the utility model are that the safety sub is arranged in the carbon brush body, when the carbon brush is worn to a certain length, the safety sub is triggered to disconnect a circuit, prevent current from passing through a commutator, and avoid motor faults caused by excessive wear of the carbon brush, and the carbon brush is simple and fast to replace by adopting a modular design, and the cost is reduced. And a user can complete the replacement operation by himself / herself without professional skills, so that the maintenance difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor carbon brush assembly technical field, specifically is a replaceable carbon brush structure with automatic power-off protection function. BACKGROUND

[0002] At present, in the prior art, the brush motor widely used in various electric tools and household appliances relies on the contact between the carbon brush and the commutator to transmit current during operation. With the increase of use time, the carbon brush will gradually wear out, and when the length of the carbon brush is shortened to a certain extent, not only will the performance of the motor be reduced due to poor contact, but also the contact surface between the too short carbon brush and the commutator will be reduced, which will generate a large amount of sparks, which not only reduces the working efficiency of the motor, but also may cause the surface of the commutator to be burned or scratched, thereby affecting the overall service life of the motor.

[0003] In addition, there is no effective mechanism in the traditional design to prevent damage to the motor caused by excessive wear of the carbon brush, and once the carbon brush is completely consumed, the user usually needs to replace the entire motor assembly, which not only increases the maintenance cost, but also causes resource waste. Although some devices allow manual replacement of the carbon brush, this requires the user to have certain professional knowledge and technology, and the replacement process is relatively complex and not easy to implement. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a replaceable carbon brush structure with automatic power-off protection function to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a replaceable carbon brush structure with automatic power-off protection function, comprising a motor shell, one end of the motor shell is provided with a stator coil, one side of the stator coil is provided with an outgoing line assembly connected thereto, the other end of the outgoing line assembly away from the stator coil is provided with a carbon brush assembly, and a first connector is arranged between the carbon brush assembly and the outgoing line assembly.

[0006] Further optimization, the stator coil and the outgoing line assembly are connected through copper band, and are fixed through a strap.

[0007] Further optimization, one side of the first connector is provided with a second connector, and the second connector and the carbon brush assembly are connected through a brush braid.

[0008] Further optimization, the carbon brush assembly is connected with the connector arranged on one side of the outgoing line assembly through the second connector.

[0009] Further optimization, an insulating sleeve is sleeved on the connector.

[0010] Further optimized, the second connector is a quick-connect terminal structure or a wire clamp cap structure connector.

[0011] In a further optimization, a safety element is provided inside the carbon brush assembly, and a spring is provided at one end of the safety element for connection thereto.

[0012] Beneficial effects

[0013] The replaceable carbon brush structure with automatic power-off protection provided by this utility model has a safety element inside the carbon brush body. The safety element consists of a spring and an insulator. When the carbon brush wears to a certain length, the safety element triggers to disconnect the circuit, preventing current from flowing through the commutator, thereby avoiding motor failure caused by excessive carbon brush wear. When the motor carbon brush wears down to the safety element, the safety element spring pops out, allowing the insulating medium of the safety element to contact the commutator, blocking the contact between the carbon brush and the commutator, cutting off the motor power supply, and ensuring that the commutator is not further damaged. The modular design makes carbon brush replacement simple and quick, and users do not need professional skills to complete the replacement operation themselves, reducing the difficulty of maintenance. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the safety substructure of this utility model. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] Example

[0018] like Figure 1 As shown, a replaceable carbon brush structure with automatic power-off protection function includes a motor housing 9, a stator coil 1 at one end of the motor housing 9, a lead wire assembly 2 connected to the stator coil 1 on one side, a carbon brush assembly 7 at the other end of the lead wire assembly 2 away from the stator coil 1, and a first connector 3 connected between the carbon brush assembly 7 and the lead wire assembly 2.

[0019] In this embodiment, the stator coil 1 and the lead wire assembly 2 are connected by copper strips and fixed by cable ties 8 to prevent the lead wire assembly from affecting them during operation.

[0020] A second connector 5 is provided on one side of the first connector 3, and the second connector 5 is connected to the carbon brush assembly 7 through a brush braid 6.

[0021] The carbon brush assembly 7 is connected to the connector 3 located on one side of the lead wire assembly 2 via the second connector 2.

[0022] The insulating sleeve 4 is sleeved on the connector 3.

[0023] The second connector 5 is a quick plug terminal structure or a wire clamp cap structure connector.

[0024] The carbon brush assembly 7 is internally provided with a safety sub 10, and the safety sub 10 is provided with a spring 11 connected thereto at one end.

[0025] The carbon brush safety sub is designed: a safety sub is arranged in the carbon brush body, the safety sub is composed of a spring and an insulator, when the carbon brush is worn to a certain length, the safety sub triggers a disconnection circuit to prevent current from passing through the commutator, thereby avoiding motor failure caused by excessive wear of the carbon brush.

[0026] Automatic power-off mechanism: when the motor carbon brush is worn to the safety sub, the safety sub spring pops out, so that the safety sub insulating medium contacts the commutator, the carbon brush contacts the commutator, and the motor power supply is cut off, so as to ensure that the commutator will not be further damaged.

[0027] Easy to replace: modular design makes carbon brush replacement simple and fast, users can replace it themselves without professional skills, reducing maintenance difficulty.

[0028] Compatibility: the carbon brush structure design of the invention takes into account the compatibility of different brands and models of motors to meet a wide range of application requirements.

[0029] The wire package and the lead assembly are connected by copper banding and fixed with a tie, the carbon brush assembly is connected with the second connector through the brush braid, and the carbon brush assembly is connected with the first connector of the lead assembly through the second connector, thereby completing the connection of the carbon brush and the stator wire package, the insulating sleeve separates the first connector from the wire package to avoid the wire connector piercing the wire package. The second connector can be a quick plug terminal structure or a wire clamp cap structure.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A replaceable carbon brush structure with automatic power-off protection function, characterized in that: Including motor shell (9), one end of the motor shell (9) is provided with stator coil (1), one side of the stator coil (1) is provided with outgoing line assembly (2) connected therewith, the other end of the outgoing line assembly (2) away from the stator coil (1) is provided with carbon brush assembly (7), the carbon brush assembly (7) and the outgoing line assembly (2) are provided with the first wire connector (3) connected therebetween.

2. The replaceable carbon brush structure with automatic power-off protection function according to claim 1, characterized in that: The stator coil (1) and the outgoing line assembly (2) are connected by copper band, and it is fixed by binding belt (8).

3. The replaceable carbon brush structure with automatic power-off protection function according to claim 2, characterized in that: One side of the first wire connector (3) is provided with the second wire connector (5), and the second wire connector (5) and the carbon brush assembly (7) are connected by brush braid (6).

4. The replaceable carbon brush structure with automatic power-off protection function according to claim 3, characterized in that: The carbon brush assembly (7) is connected with the first wire connector (3) arranged on one side of the outgoing line assembly (2) through the second wire connector (5).

5. The replaceable carbon brush structure with automatic power-off protection function according to claim 1, characterized in that: The first wire connector (3) is sleeved with an insulating sleeve (4).

6. The replaceable carbon brush structure with automatic power-off protection function according to claim 3, characterized in that: The second wire connector (5) is a quick plug terminal structure or a wire clamp cap structure wire connector.

7. The replaceable carbon brush structure with automatic power-off protection function according to claim 1, characterized in that: The carbon brush assembly (7) is provided with a safety sub (10) inside, and the safety sub (10) is provided with a spring (11) connected thereto at one end.

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