A motor brush holder with a fusible inductor

Abstract

The utility model discloses a motor brush holder with fusible inductance, including fusible inductance, carbon brush board and carbon brush, fusible inductance fixed setting in the inductance installation area of carbon brush board, fusible inductance includes the magnetic core, the first coil and the second coil are covered with side by side on the magnetic core, first tin soldering end and first pin are provided with respectively at the both ends of first coil, second tin soldering end and second pin are provided with respectively at the both ends of second coil, first tin soldering end, second tin soldering end outwardly protrude and symmetrically set up in the middle part of magnetic core, first tin soldering end, second tin soldering end pass through tin soldering electric connection, before fusible inductance tin soldering, first tin soldering end, second tin soldering end form the included angle alpha, after fusible inductance tin soldering, first tin soldering end, second tin soldering end are parallel, first pin, second pin are connected with carbon brush electric connection according to the set circuit. The utility model discloses simple structure, and processing is quick, and production efficiency is high and cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of motor brush holder technology, and in particular to a motor brush holder with a fusible inductor. Background Technology

[0002] With the continuous growth of car ownership in my country, the demand for automotive motors is also expanding. Brushed motors are widely used in automotive parts, and their safety performance is receiving increasing attention from end users. Fusible inductors are a new type of safety inductor for automotive applications. They consist of two separate coils inserted into a magnetic core and then fused together with solder. During motor operation, if the motor stalls and the temperature rises, the temperature of the fusible inductor also rises. When the inductor's temperature reaches the melting point of the solder, the fused ends of the left and right coils separate due to the melting solder and its own tension, thus breaking the circuit and preventing fire caused by motor overload. However, because liquid solder is viscous, the separation speed of the fused ends is relatively slow, and it cannot be guaranteed that the left and right coils will immediately disconnect and form an open circuit when the motor stalls. Chinese patent CN 221407925 U discloses a fusible inductor, including a magnetic core and a spring-loaded mechanism. The spring-loaded mechanism includes an upper spring seat, a compression spring, and a lower spring seat. The upper spring seat is fixed inside an upper blind hole, the lower spring seat is fixed inside a lower blind hole, and the compression spring is fixed between the upper and lower spring seats. However, this fusible inductor has the following drawbacks: 1. The spring-opening mechanism has a complex structure and high processing cost. First, it is necessary to specially make the solder end of the first coil, the solder end of the second coil, the upper spring seat and the lower spring seat. Blind holes are made in the two solder ends, and the upper spring seat, the lower spring seat and the compression spring are installed in the blind holes. The manufacturing process is cumbersome and affects production efficiency.

[0003] 2. If the motor stalls during use and the temperature rises, the fusible inductor will trip when heated, causing the spring seat and compression spring to fall into the motor brush holder. During maintenance, workers may accidentally leave the small spring seat and compression spring inside the motor brush holder, affecting the normal operation of the motor. Utility Model Content

[0004] The purpose of this invention is to provide a motor brush holder with a fusible inductor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A motor brush holder with a fusible inductor includes a fusible inductor, a brush plate, and a brush. The fusible inductor is fixedly disposed within the inductor mounting area of ​​the brush plate. The fusible inductor includes a magnetic core, on which a first coil and a second coil are wrapped side by side. The first coil has a first solder end and a first pin at its two ends, and the second coil has a second solder end and a second pin at its two ends, respectively. The first solder end and the second solder end extend outward from the middle of the magnetic core and are symmetrically arranged vertically. The first solder end and the second solder end are electrically connected by soldering. Before soldering, the first solder end and the second solder end form an included angle α. After soldering, the first solder end and the second solder end are parallel. The first pin and the second pin are electrically connected to the brush according to a set circuit.

[0006] Furthermore, the first coil and the second coil are made of enameled wire.

[0007] Furthermore, the first solder end and the first pin are formed by bending both ends of the first coil body.

[0008] Furthermore, the second solder end and the second pin are formed by bending both ends of the second coil body.

[0009] Furthermore, the included angle α ranges from 6 to 12 degrees.

[0010] Furthermore, the included angle α is equal to 10 degrees.

[0011] Furthermore, the first pin extends outward from one end of the magnetic core, and the second pin extends outward from the other end of the magnetic core. The first pin and the second pin are parallel and face the same direction as the first solder end and the second solder end.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model provides a first soldering end and a second soldering end for the first coil and the second coil, respectively. Before soldering, the first soldering end and the second soldering end are opened at a certain angle. During soldering, pressure is first applied to the first soldering end and the second soldering end to make them parallel, and then soldering is performed. This gives the first soldering end and the second soldering end a certain pre-spring force. During the use of the motor, once the motor stalls and the temperature rises to the melting temperature of the solder, the solder melts. The first soldering end and the second soldering end quickly spring open with the help of the pre-spring force, disconnecting the connection and ensuring that the circuit is quickly cut off. This cuts off the circuit before the motor catches fire, preventing the risk of fire caused by motor overload and ensuring safety.

[0013] 2. This utility model has a simple structure, is quick to process, has high production efficiency, and low cost. Attached Figure Description

[0014] Figure 1Schematic diagram of a fusible inductor (before soldering); Figure 2 Front view of a fusible inductor (before soldering); Figure 3 Left view of a fusible inductor (before soldering); Figure 4 This is a schematic diagram of a fusible inductor assembly. In the diagram: 1-fusible inductor, 101-magnetic core, 102-first coil, 103-first solder end, 104-first pin, 105-second coil, 106-second solder end, 107-second pin, 2-carbon brush plate, 3-carbon brush. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Please see Figures 1-4 One embodiment provided by this utility model: A motor brush holder with a fusible inductor includes a fusible inductor 1, a brush plate 2, and carbon brushes 3. The fusible inductor 1 is fixedly disposed in the inductor mounting area of ​​the brush plate 2, and the carbon brushes 3 are mounted in the carbon brush mounting area of ​​the brush plate 2. The fusible inductor 1 includes a magnetic core 101, on which a first coil 102 and a second coil 105 are wrapped side by side. The first coil 102 has a first solder terminal 103 and a first pin 104 respectively disposed at both ends, and the second coil 105 has a second solder terminal at both ends. Pins 106 and 107, the first solder end 103 and the second solder end 106 extend outward from the middle of the magnetic core 101 and are symmetrically arranged vertically. The first solder end 103 and the second solder end 106 are electrically connected by soldering. Before soldering the fusible inductor 1, the first solder end 103 and the second solder end 106 form an included angle α. After soldering the fusible inductor 1, the first solder end 103 and the second solder end 106 are parallel. Pins 104 and 107 are electrically connected to the carbon brush 3 according to the set circuit.

[0017] The first coil 102 and the second coil 105 are made of enameled wire.

[0018] The first solder end 103 and the first pin 104 are formed by bending both ends of the body of the first coil 102, and the second solder end 106 and the second pin 107 are formed by bending both ends of the body of the second coil 105. This overcomes the defect of the prior art that requires specially made first and second coil solder ends.

[0019] The included angle α ranges from 6 to 12 degrees. In this embodiment, the included angle α is equal to 10 degrees, so that the first solder end 103 and the second solder end 106 can maintain a suitable pre-spring force after soldering. When soldering the first solder end 103 and the second solder end 106, pressure is first applied to the first solder end 103 and the second solder end 106 so that the included angle α is 0 degrees, that is, the first solder end 103 and the second solder end 106 are parallel, and then soldering is performed, so that the first solder end 103 and the second solder end 106 have a certain pre-spring force. During the use of the motor, once the motor stalls and the temperature rises, the temperature of the fusible inductor 1 also rises. When the temperature reaches the melting temperature of the solder, the solder melts, and the first solder end 103 and the second solder end 106 quickly spring apart with the help of the pre-spring force, disconnecting the connection and ensuring that the circuit is quickly cut off. This cuts off the circuit before the motor catches fire, prevents the risk of fire caused by motor overload, and ensures safety.

[0020] The first pin 104 extends outward from one end of the magnetic core 101, and the second pin 107 extends outward from the other end of the magnetic core 3. The first pin 104 and the second pin 107 are parallel and face the same direction as the first solder end 103 and the second solder end 106. During installation, the first pin 104 and the second pin 107 face the inside of the carbon brush plate 2 to facilitate electrical connection with the carbon brush 3.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor brush holder with a fusible inductor, comprising a fusible inductor (1), a brush plate (2), and a brush (3), wherein the fusible inductor (1) is fixedly disposed in the inductor mounting area of ​​the brush plate (2), characterized in that: The fusible inductor (1) includes a magnetic core (101), on which a first coil (102) and a second coil (105) are wrapped side by side. The first coil (102) has a first solder terminal (103) and a first pin (104) at its two ends, and the second coil (105) has a second solder terminal (106) and a second pin (107) at its two ends. The first solder terminal (103) and the second solder terminal (106) are connected to the magnetic core (101). The inductor extends outward from the middle and is symmetrically arranged vertically. The first solder end (103) and the second solder end (106) are electrically connected by soldering. Before soldering the inductor (1), the first solder end (103) and the second solder end (106) form an angle α. After soldering the inductor (1), the first solder end (103) and the second solder end (106) are parallel. The first pin (104) and the second pin (107) are electrically connected to the carbon brush (3) according to the set circuit.

2. A motor brush holder with a fusible inductor according to claim 1, characterized in that: The first coil (102) and the second coil (105) are made of enameled wire.

3. A motor brush holder with a fusible inductor according to claim 1, characterized in that: The first solder end (103) and the first pin (104) are formed by bending the two ends of the first coil (102) body.

4. A motor brush holder with a fusible inductor according to claim 1, characterized in that: The second solder end (106) and the second pin (107) are formed by bending the two ends of the body of the second coil (105).

5. A motor brush holder with a fusible inductor according to claim 1, characterized in that: The included angle α ranges from 6 to 12 degrees.

6. A motor brush holder with a fusible inductor according to claim 5, characterized in that: The included angle α is equal to 10 degrees.

7. A motor brush holder with a fusible inductor according to claim 1, characterized in that: The first pin (104) extends outward from one end of the magnetic core (101), and the second pin (107) extends outward from the other end of the magnetic core (101). The first pin (104) and the second pin (107) are parallel and face the same direction as the first solder end (103) and the second solder end (106).

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