Direct-current brush motor and electric operating mechanism of miniature circuit breaker

Abstract

The utility model discloses a direct-current brush motor, which is characterized in that the welding part of a wiring terminal and a wire is protected to be straight, the structural stability is good, and the processing is more convenient. In addition, the utility model also discloses an electric operating mechanism of the miniature circuit breaker with the DC brush motor. The DC brush motor comprises a motor body, a wiring terminal and an electric wire, the motor body comprises an electric brush, the outer side wall of the motor body is provided with a connecting seat, the connecting seat is provided with a vertically-through connecting through hole, the first end of the electric brush penetrates into the connecting through hole, the first end of the wiring terminal is bent and penetrates into the connecting through hole, and the second end of the wiring terminal is bent and penetrates into the connecting through hole. The first end of the wiring terminal is electrically connected with the first end of the electric brush, the second end of the wiring terminal is arranged straightly, the electric wire is welded to the second end of the wiring terminal, and an insulating tube is sleeved outside the joint of the electric wire and the second end of the wiring terminal.

Description

Technical Field

[0001] The utility model relates to the field of household electrical appliances, in particular to a DC brushed motor and an electric operating mechanism of a small circuit breaker. Background Art

[0002] The electric operating mechanism of a small circuit breaker is an accessory used for long-distance electric opening and closing of circuit breakers. When used in conjunction with a small circuit breaker dedicated to prepaid electricity meters, it can achieve reclosing after payment. The electric operating mechanism of existing small circuit breakers usually uses a motor to control the handle through a gear set to open and close the circuit. The motor is connected to the terminals and wires to introduce and lead out current. The terminals and wires are welded to form a bent structure. After several bends, stress damage is prone to occur, or it is easily squeezed or pulled by other structures. Stress damage may also occur, causing the small circuit breaker to fail. In addition, it is not easy to pass through the pipe after welding, so it is necessary to avoid bending the wires connecting the motor.

[0003] Therefore, there is an urgent need to provide a DC brushed motor with a straight welding point between a terminal and an electric wire to overcome the above-mentioned defects. Utility Model Content

[0004] The utility model aims to provide a DC brushed motor with a straight welding position between a wiring terminal and an electric wire.

[0005] Another object of the utility model is to provide an electric operating mechanism for a small circuit breaker.

[0006] To achieve the above-mentioned purpose, the DC brush motor of the utility model is suitable for the electric operating mechanism of a small circuit breaker. The DC brush motor of the utility model includes a motor body, a terminal and an electric wire. The motor body includes a brush. A connecting seat is installed on the outer wall of the motor body. The connecting seat is provided with a connecting through hole that runs through from top to bottom. The first end of the brush passes through the connecting through hole. The first end of the terminal is bent and passes through the connecting through hole. The first end of the terminal is electrically connected to the first end of the brush. The second end of the terminal is arranged straight. The electric wire is welded to the second end of the terminal. The connection between the electric wire and the second end of the terminal is covered with an insulating tube.

[0007] Preferably, the first end and the second end of the connection terminal are arranged orthogonally.

[0008] Preferably, the first end of the connection terminal is riveted to the first end of the brush.

[0009] Preferably, the motor body includes a casing, a stator and a rotor, the stator and the rotor are arranged in the casing, a collector ring is installed at one end of the rotor, the first end of the brush abuts against the collector ring, the connecting seat is also provided with a clamping groove connected to the connecting through hole, and the wiring terminal and the brush are also respectively clamped into the clamping groove.

[0010] Preferably, the housing comprises a shell and an end cover, the end cover is mounted on the first end of the shell, and the connecting seat is locked to the end cover.

[0011] Preferably, the connecting seat is provided with a locking hole, and the end cover is provided with a locking convex shaft, and the locking convex shaft is inserted into the locking hole.

[0012] Preferably, a positioning notch is formed on the side wall of the end cover, the locking cam is opposite to the positioning notch, a positioning protrusion extends outward from one side of the connecting seat, the locking hole is provided on the positioning protrusion, and the positioning protrusion passes through the positioning notch and is provided in the end cover.

[0013] Preferably, the outer side wall of the end cover is provided with a limiting boss located above the connecting seat, and the connecting seat abuts against the limiting boss.

[0014] To achieve another objective mentioned above, the utility model provides an electric operating mechanism for a small circuit breaker, which includes the above-mentioned DC brushed motor.

[0015] Preferably, the electric operating mechanism of the miniature circuit breaker of the utility model further includes a gear set, and the motor body is transmission-connected to the gear set.

[0016] Compared with the prior art, the utility model sets the second end of the terminal block as a straight structure, so that the wire is not bent after being welded to the second end of the terminal block, thereby greatly reducing the risk of stress damage after bending. In addition, since the welding point is also arranged straight, it will not affect the insertion of the insulating tube, which can be seen that the structural stability and processing convenience are optimized.

[0017] It is understandable that, since the electric operating mechanism of the miniature circuit breaker of the utility model includes the above-mentioned DC brushed motor, it has the advantages of high structural stability and high processing convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the electric operating mechanism of the miniature circuit breaker of the utility model.

[0019] Figure 2 It is a three-dimensional diagram of the electric operating mechanism of the miniature circuit breaker of the utility model at another angle.

[0020] Figure 3 It is a three-dimensional diagram of the electric operating mechanism of the miniature circuit breaker of the utility model after the end cover is separated.

[0021] Figure 4 It is a stereoscopic diagram of the electric operating mechanism of the miniature circuit breaker of the utility model after the housing, the end cover, the wiring terminals, the electric wires and the insulating tube are separated.

[0022] Figure 5It is a stereoscopic diagram of the electric operating mechanism of the miniature circuit breaker of the utility model after the housing, stator, rotor and gear set are hidden.

[0023] Figure 6 yes Figure 5 Exploded perspective view of the structure shown.

[0024] Figure 7 yes Figure 6 A three-dimensional view of the structure shown at another angle.

[0025] Figure 8 yes Figure 6 Exploded perspective view of the structure shown further exploded with the end caps hidden. DETAILED DESCRIPTION

[0026] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the embodiments and the accompanying drawings.

[0027] like Figures 1 to 3 The utility model discloses a brushed DC motor which can be used for an electric operating mechanism 1000 of a small circuit breaker. The brushed DC motor 100 and a gear set 200 are connected in transmission to form the electric operating mechanism 1000, and the opening and closing of the circuit breaker are performed by a control handle.

[0028] like Figures 1 to 8 As shown, the DC brushed motor 100 of the utility model includes a motor body 10, a terminal 20 and a wire 30. The motor body 10 includes a brush 11, and a connection seat 12 is installed on the outer wall of the motor body 10. The connection seat 12 is provided with a connection through hole 121 that runs through from top to bottom. The first end of the brush 11 passes through the connection through hole 121, and the first end of the terminal 20 is bent and passes through the connection through hole 121. The first end of the terminal 20 is electrically connected to the first end of the brush 11, and the second end of the terminal 20 is arranged straight. The wire 30 is welded to the second end of the terminal 20, and the connection between the wire 30 and the second end of the terminal 20 is covered with an insulating tube 40. In the utility model, the second end of the terminal 20 is a straight structure, and the wire 30 is not bent after being welded to the second end of the terminal 20, which greatly reduces the risk of stress damage after bending. In addition, since the welding part is also arranged straight, it will not affect the penetration of the insulating tube 40, which can be seen that the structural stability and processing convenience are optimized. The insulating tube 40 is a rubber tube.

[0029] like Figure 7 and Figure 8 As shown, the first end and the second end of the terminal 20 are arranged orthogonally. Preferably, the first end of the terminal 20 is riveted to the first end of the brush 11 to enhance the connection stability between the first end of the terminal 20 and the first end of the brush 11.

[0030] like Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the motor body 10 includes a housing 13, a stator 14 and a rotor 15. The stator 14 and the rotor 15 are arranged in the housing 13, and a collector ring 151 is installed at one end of the rotor 15, and the first end of the brush 11 abuts against the collector ring 151. The connecting seat 12 is also provided with a clamping groove 122 connected to the connecting through hole 121, and the connecting terminal 20 and the brush 11 are also clamped into the clamping groove 122 respectively. The connecting terminal 20 and the brush 11 are clamped into the clamping groove 122 to improve the installation stability of the two. Preferably, the clamping groove 122 is placed obliquely, but it is not limited to this.

[0031] like Figures 2 to 8 As shown, the housing 13 includes a housing 131 and an end cover 132, the end cover 132 is mounted on the first end of the housing 131, and the connection base 12 is locked to the end cover 132. Preferably, the housing 131 is a metal structure, and the end cover 132 is a plastic structure, but not limited thereto. Further, the connection base 12 is provided with a locking hole 123, and the end cover 132 is provided with a locking convex shaft 1321, and the locking convex shaft 1321 is inserted into the locking hole 123, so as to realize the mutual locking of the connection base 12 and the end cover 132.

[0032] like Figures 5 to 8 As shown, a positioning notch 1322 is provided on the side wall of the end cover 132, and the locking convex shaft 1321 is directly opposite to the positioning notch 1322. A positioning protrusion 124 extends outward from one side of the connecting seat 12, and the locking hole 123 is provided on the positioning protrusion 124. The positioning protrusion 124 passes through the positioning notch 1322 and is provided in the end cover 132. With the help of the positioning notch 1322 and the positioning protrusion 124, the mutual positioning of the two is strengthened, and the structural stability is strengthened.

[0033] like Figure 1 , Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, in order to further improve the positioning effect and enhance the structural stability, the outer wall of the end cover 132 is provided with a limiting boss 1323 located above the connecting seat 12, and the connecting seat 12 abuts against the limiting boss 1323. At this point, the connecting seat 12 is fully positioned and has good structural stability.

[0034] like Figure 4 As shown, the rotor 15 of the motor body 10 is drivingly connected to the gear set 200 .

[0035] Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 , the direction indicated by arrow Z is from top to bottom.

[0036] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A brushless DC motor suitable for an electric operating mechanism of a small circuit breaker, characterized in that: It includes a motor body, a terminal and an electric wire, wherein the motor body includes a brush, a connecting seat is installed on the outer side wall of the motor body, the connecting seat is provided with a connecting through hole which passes through from top to bottom, the first end of the brush passes through the connecting through hole, the first end of the terminal is bent and passes through the connecting through hole, the first end of the terminal is electrically connected to the first end of the brush, the second end of the terminal is arranged straight, the electric wire is welded to the second end of the terminal, and the connection between the electric wire and the second end of the terminal is covered with an insulating tube.

2. The brushed DC motor according to claim 1, characterized in that: The first end and the second end of the connection terminal are arranged orthogonally.

3. The brushed DC motor according to claim 1, characterized in that: The first end of the connection terminal is riveted to the first end of the brush.

4. The brushed DC motor according to claim 1, characterized in that: The motor body includes a shell, a stator and a rotor, wherein the stator and the rotor are arranged in the shell, a collector ring is installed at one end of the rotor, and the first end of the brush abuts against the collector ring. The connecting seat is also provided with a clamping groove connected to the connecting through hole, and the connecting terminal and the brush are also respectively clamped in the clamping groove.

5. The brushed DC motor according to claim 4, characterized in that: The housing comprises a shell and an end cover, wherein the end cover is mounted on a first end of the shell, and the connecting seat is locked to the end cover.

6. The brushed DC motor according to claim 5, characterized in that: The connecting seat is provided with a locking hole, and the end cover is provided with a locking convex shaft, and the locking convex shaft is inserted into the locking hole.

7. The brushed DC motor according to claim 6, characterized in that: A positioning notch is formed on the side wall of the end cover, the locking cam is opposite to the positioning notch, a positioning protrusion extends outward from one side of the connecting seat, the locking hole is arranged on the positioning protrusion, and the positioning protrusion passes through the positioning notch and is arranged in the end cover.

8. The brushed DC motor according to claim 5, characterized in that: The outer side wall of the end cover is provided with a limiting boss located above the connecting seat, and the connecting seat is in abutment with the limiting boss.

9. An electric operating mechanism for a miniature circuit breaker, characterized in that: It comprises a brushed DC motor as described in any one of claims 1 to 8.

10. The electric operating mechanism of a miniature circuit breaker according to claim 9, characterized in that: It also includes a gear set, and the motor body is drivingly connected to the gear set.

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