Breaker moving contact mechanism convenient to assemble

Abstract

The utility model discloses a breaker moving contact mechanism convenient to assemble, which is provided with an outer shell, a moving contact seat, a moving contact and a lock catch, a first mounting column is arranged on the inner side of the outer shell, and the breaker moving contact mechanism is characterized in that a first connecting rod is arranged in the middle of the first mounting column, a connecting hole for the first connecting rod to pass through is arranged on the moving contact seat, and the lock catch is arranged on the first connecting rod. A first positioning protrusion and a second positioning protrusion are arranged at the positions, corresponding to the first installation column, of the inner side of the outer shell, the first installation column is sleeved with a torsion spring, a first torsion arm at one end of the torsion spring is tightly pressed on the first positioning protrusion, and a second torsion arm of the torsion spring is tightly pressed on the second positioning protrusion. And the moving contact seat is provided with an abutting part which can be matched and pressed with the second torsion arm. According to the structure of the utility model, automatic installation of the elastic reset member of the moving contact seat can be facilitated, the labor intensity of workers can be reduced, and the assembly efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to safe electrical equipment, in particular to a circuit breaker moving contact mechanism which is easy to assemble. Background Art

[0002] Miniature circuit breakers are used to access power lines and then detect the circuit. When a short circuit, leakage or overload is found in the circuit, the internal coil assembly will be controlled to pass a high-voltage current to drive the iron core to move, squeeze the lock and drive the moving contact seat to move, so that the moving contact is separated from the static contact, and the circuit is disconnected to ensure the safety of electricity use. A tension spring or a compression spring is often arranged inside the circuit breaker to cooperate with one end of the moving contact seat to ensure that the moving contact seat can be quickly moved and disconnected and will not move back. For example, the intelligent miniature circuit breaker and method disclosed in the Chinese patent document (publication number: CN112768315A; publication date: May 7, 2021) adopts a method of connecting a tension spring with a moving contact seat. The Chinese patent document (publication number: CN102931038A; publication date: February 13, 2013) discloses an operating mechanism of a miniature circuit breaker, which adopts a structure in which a moving contact seat cooperates with a compression spring.

[0003] The defects of the above two structures are: when assembling the circuit breaker, the compression spring or the tension spring must be manually installed into the circuit breaker housing, and then one end of the tension spring must be hooked with the moving contact seat, or the compression spring must be pressed tightly against one side of the moving contact seat. The labor intensity of the workers is high, and the production and assembly efficiency is low, making it difficult to carry out modern automatic assembly production and processing. Utility Model Content

[0004] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a circuit breaker moving contact mechanism that is easy to assemble and is used to solve the above problems.

[0005] To this end, the utility model is implemented by adopting the following scheme:

[0006] A circuit breaker moving contact mechanism that is easy to assemble comprises an outer shell, a moving contact seat, a moving contact and a lock, wherein a first mounting column is arranged inside the outer shell, and is characterized in that a first connecting rod is arranged in the middle of the first mounting column, a connecting hole for the first connecting rod to pass through is arranged on the moving contact seat, a first positioning protrusion and a second positioning protrusion are arranged on the inner side of the outer shell at positions corresponding to the first mounting column, a torsion spring is sleeved on the first mounting column, a first torsion arm at one end of the torsion spring is pressed tightly against the first positioning protrusion, and a second torsion arm of the torsion spring is pressed tightly against the second positioning protrusion, and the moving contact seat has a supporting portion that can cooperate with the second torsion arm for pressing.

[0007] A positioning step is extendedly provided on the second positioning protrusion, the second torsion arm is tightly pressed on the positioning step, and a first clearance groove for the positioning step to extend into is provided on the moving contact seat.

[0008] The movable contact seat is provided with a sleeve, the coil of the torsion spring is located in the sleeve, a placement groove is opened on the side wall of the sleeve, the second torsion arm is located in the placement groove, and the abutting portion is the side wall of the placement groove.

[0009] The easy-to-assemble circuit breaker moving contact mechanism of the above technical solution adopts a torsion spring to realize the elastic reset of the moving contact seat, and the first and second positioning protrusions are provided to position the two torsion arms of the torsion spring, so as to realize the automatic positioning and clamping of the torsion spring. During assembly, it is only necessary to install the torsion spring along the correct angle and then put it into the assembled moving contact seat to complete the overall assembly of the moving contact seat. The assembly method is very simple and can be suitable for the placement and installation method of a mechanical arm, replacing the traditional compression spring and tension spring structure, greatly reducing the labor intensity of workers and improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 The utility model is provided with a structural diagram of the inside of the circuit breaker;

[0012] Figure 2 for Figure 1 Another view after removing the moving contact seat, moving contact and lock;

[0013] Figure 3 for Figure 2 A partial enlarged view of the area pointed by A in the middle;

[0014] Figure 4 It is a structural diagram of the moving contact seat of the utility model. DETAILED DESCRIPTION

[0015] As shown in the figure, the utility model discloses a circuit breaker moving contact mechanism that is easy to assemble, comprising an outer shell 5, a moving contact seat 4, a moving contact 1 and a lock 2. A first mounting column 8 is arranged on the inner side of the outer shell 5, a first connecting rod 3 is arranged in the middle of the first mounting column 8, a connecting hole 16 for the first connecting rod 3 to pass through is arranged on the moving contact seat 4, a first positioning protrusion 6 and a second positioning protrusion 11 are arranged on the inner side of the outer shell 5 at positions corresponding to the first mounting column 8, a torsion spring 7 is sleeved on the first mounting column 8, a first torsion arm 12 at one end of the torsion spring 7 is pressed tightly on the first positioning protrusion 6, and a second torsion arm 10 of the torsion spring 7 is pressed tightly on the second positioning protrusion 11, and a supporting portion 13 that can cooperate with the second torsion arm 10 to be pressed is provided on the moving contact seat 4. Furthermore, a positioning step 9 is extendedly provided on the second positioning protrusion 11, and the second torsion arm 10 is pressed against the positioning step 9, so as to facilitate the positioning of the second torsion arm 10. A first clearance groove 17 is provided on the moving contact seat 4 for the positioning step 9 to extend into, so as to ensure that the moving contact seat 4 will not collide with the positioning step 9 when swinging. A sleeve 15 is provided on the moving contact seat 4, and the coil part of the torsion spring 7 is located in the sleeve 15, so as to facilitate the matching assembly of the moving contact seat 4 and the torsion spring. A placement groove 14 is provided on the side wall of the sleeve 15, and the second torsion arm 10 is located in the placement groove 14. The abutting portion 13 is the side wall of the placement groove 14, and the second torsion arm 10 is inserted into the placement groove 14, so as to ensure that the second torsion arm 10 can stably drive the moving contact seat 4 to perform elastic reset.

[0016] When assembling the movable contact mechanism of the utility model, the mechanical arm can be controlled to take the torsion spring 7 and rotate it to a suitable angle, and then the torsion spring 7 can be directly installed in the first installation column 8, and the first positioning protrusion 6 and the positioning step 9 respectively position the first torsion arm 12 and the second torsion arm 10 of the torsion spring to achieve the positioning installation of the torsion spring, and then the movable contact seat 4 assembled with the movable contact 1 and the lock 2 is rotated to a suitable angle to install it, so that the first connecting rod 3 is inserted into the connecting hole 16, and at this time the spring coil part of the torsion spring 7 Located in the sleeve 15, the second torsion arm 10 enters into the placement groove 14, thereby completing the overall assembly of the moving contact assembly. At this time, the moving contact is in the disconnected position. When the moving contact seat 4 is controlled to swing and the moving and static contacts are in contact, the second torsion arm 10 will be driven to swing, and the torsion spring 7 will store force. When the circuit breaker detects a circuit abnormality and controls the moving contact seat to swing to disconnect the moving and static contacts, the second torsion arm 10 will provide auxiliary force to drive the moving contact seat 4 to swing, thereby realizing a rapid swing of the moving contact seat 4 and ensuring that the moving contact seat 4 will not swing back.

[0017] The structure of the utility model adopts a torsion spring to realize the elastic reset of the moving contact seat, and the first and second positioning protrusions are provided to position the two torsion arms of the torsion spring, so that the automatic positioning and clamping of the torsion spring can be realized. During assembly, it is only necessary to install the torsion spring along the correct angle and then put it into the assembled moving contact seat to complete the overall assembly of the moving contact seat. The assembly method is very simple and can be suitable for the placement and installation of a mechanical arm, replacing the traditional compression spring and tension spring structure, greatly reducing the labor intensity of workers and improving the assembly efficiency.

Claims

1. A circuit breaker moving contact mechanism that is easy to assemble, comprising an outer shell (5), a moving contact seat (4), a moving contact (1) and a lock (2), wherein a first mounting column (8) is arranged inside the outer shell (5). Features: A first connecting rod (3) is arranged in the middle of the first mounting column (8), a connecting hole (16) for the first connecting rod (3) to pass through is arranged on the moving contact seat (4), a first positioning protrusion (6) and a second positioning protrusion (11) are arranged on the inner side of the outer shell (5) at positions corresponding to the first mounting column (8), a torsion spring (7) is sleeved on the first mounting column (8), a first torsion arm (12) at one end of the torsion spring (7) is pressed tightly against the first positioning protrusion (6), and a second torsion arm (10) of the torsion spring (7) is pressed tightly against the second positioning protrusion (11), and the moving contact seat (4) has a supporting portion (13) that can cooperate with the second torsion arm (10) to be pressed tightly.

2. The circuit breaker moving contact mechanism that is easy to assemble according to claim 1, Features A positioning step (9) is extendedly provided on the second positioning protrusion (11), the second torsion arm (10) is pressed tightly against the positioning step (9), and a first clearance groove (17) is provided on the moving contact seat (4) for the positioning step (9) to extend into.

3. The circuit breaker moving contact mechanism that is easy to assemble according to claim 1, Features A sleeve (15) is provided on the movable contact seat (4), the coil portion of the torsion spring (7) is located in the sleeve (15), a placement groove (14) is provided on the side wall of the sleeve (15), the second torsion arm (10) is located in the placement groove (14), and the abutment portion (13) is the side wall of the placement groove (14).

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