Miniature circuit breaker convenient to disassemble and assemble

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a miniature circuit breaker convenient to disassemble and assemble, which comprises a circuit breaker shell, a switch is rotatably connected to the surface of the circuit breaker shell, and a first fixing column is fixedly connected to one side of the circuit breaker shell. A first limiting groove is formed in the surface of the circuit breaker shell, a fixing plate is fixedly connected to one side of the first fixing column, a limiting rod is slidably connected to one side of the fixing plate, and a limiting hole is formed in one side of the switch. According to the utility model, the surface of the circuit breaker housing is provided with the first limiting groove, when a maintenance worker carries out power-off maintenance, the switch is switched off and rotated into the first limiting groove, and then the limiting rod is moved, so that the limiting rod enters the limiting hole to limit the switch, and the switch cannot be rotated and closed, thereby achieving the function of preventing mistaken touch. And electric shock caused by mistakenly touching the switch by a maintenance worker during maintenance can be prevented.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a miniature circuit breaker which is convenient for disassembly and assembly. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague, and those above 3kV are generally called high-voltage electrical appliances.

[0003] The prior art publication number CN210429700U discloses a circuit breaker. This technical solution can place some components in the upper cover, saving the space of the lower shell, so that more components can be placed in the lower shell, improving the effective utilization of space, providing more functions, and increasing practicality and innovation. The above-mentioned patent switch circuit breaker has a poor anti-mistouch effect, so that maintenance workers are prone to switch the switch when repairing the circuit breaker, causing the switch to close, so that maintenance workers are prone to electric shock and cause harm to the human body, so it needs further improvement. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a miniature circuit breaker that is convenient for assembly and disassembly.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] A miniature circuit breaker that is easy to disassemble and assemble comprises a circuit breaker housing, a switch is rotatably connected to the surface of the circuit breaker housing, a first fixing column is fixedly connected to one side of the circuit breaker housing, a first limiting groove is provided on the surface of the circuit breaker housing, a fixing plate is fixedly connected to one side of the first fixing column, a limiting rod is slidably connected to one side of the fixing plate, and a limiting hole is provided on one side of the switch. A second limiting groove is provided on the surface of the circuit breaker housing, a first mounting plate is fixedly connected to the surface of the circuit breaker housing, two second fixing columns are fixedly connected inside the second limiting groove, a second mounting plate is slidably sleeved on the surface of the two second fixing columns, and a screw rod is rotatably connected to the upper end of the second mounting plate.

[0007] Through the above scheme, a limit groove is opened on the surface of the circuit breaker housing. When the maintenance worker performs power-off maintenance, the switch is disconnected and rotated to the first limit groove, and then the limit rod is moved to make the limit rod enter the limit hole to limit the switch so that the switch cannot be rotated and closed, thereby preventing the worker from accidentally touching the switch to close it during maintenance and causing electric shock. When installing, the hand wheel is turned to rotate the screw rod, because the screw rod and the circuit breaker housing are threadedly connected, so the screw rod moves downward when rotating. Because the second mounting plate is slidably sleeved on the surface of the second fixed column, the screw rod moves downward to drive the second mounting plate to move downward, so that the first mounting plate and the second mounting plate are clamped on the mounting guide rail to complete the installation.

[0008] Furthermore, three wiring holes are provided at the upper end of the circuit breaker housing, so that the wires can be connected to the circuit breaker at these holes.

[0009] Furthermore, the circuit breaker housing is provided with a plurality of wire fixing holes. According to the above solution, the wire fixing holes are provided with fixing screws to fix the wires.

[0010] Furthermore, heat absorbing plates are fixedly connected to both sides of the circuit breaker housing, and multiple heat dissipation holes are opened on the surfaces of the two heat absorbing plates. Through the above scheme, the heat absorbing plates can absorb the heat generated when the circuit breaker is working and discharge it through the heat dissipation holes.

[0011] Furthermore, two springs are fixedly connected to the surface of the circuit breaker housing. Through the above solution, during installation, the guide rail compresses the spring, and the spring undergoes elastic deformation to generate an opposite force, which can make the installation more secure.

[0012] Furthermore, the upper end of the screw rod penetrates the circuit breaker housing and is fixedly connected with a hand wheel. According to the above scheme, the screw rod can be rotated by turning the hand wheel, and the screw rod can only move downward when rotating.

[0013] Furthermore, one side of the limit rod is fixedly connected to a limit block to prevent the limit rod from falling.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] By opening a first limiting groove on the surface of the circuit breaker housing, the maintenance worker disconnects the switch and rotates the switch into the first limiting groove when performing power-off maintenance, and then moves the limiting rod so that the limiting rod enters the limiting hole to limit the switch so that the switch cannot be rotated and closed, thereby achieving the function of preventing accidental touch, preventing the maintenance worker from accidentally touching the switch and causing electric shock during maintenance. During installation, the hand wheel is turned to drive the screw rod to rotate and move downward. Since the second mounting plate is slidably sleeved on the surface of the second fixed column, the screw rod moves downward and drives the second mounting plate to move downward, so that the first mounting plate and the second mounting plate are clamped on the mounting guide rail to complete the installation. This device is simple to operate and improves installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 For this application Figure 1 A magnified view of the structure at center;

[0018] Figure 3 This is a schematic diagram of the spring installation structure for this application;

[0019] Figure 4 This is a schematic diagram of the installation structure of the second mounting plate of this application.

[0020] In the figure:

[0021] 1. Circuit breaker housing; 2. Wiring hole; 3. Wire fixing hole; 4. Switch; 5. Heat absorbing plate; 6. Heat dissipation hole; 7. Limit hole; 8. First limit slot; 9. Limit rod; 10. Limit block; 11. Fixed plate; 12. First fixed column; 13. Second limit slot; 14. Second fixed column; 15. Spring; 16. First mounting plate; 17. Second mounting plate; 18. Screw rod; 19. Hand wheel. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model.

[0023] In the description of the utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1 and Figure 2In this embodiment, a miniature circuit breaker that is easy to disassemble and assemble includes a circuit breaker housing 1, a switch 4 is rotatably connected to the surface of the circuit breaker housing 1, a first fixing column 12 is fixedly connected to one side of the circuit breaker housing 1, a first limiting groove 8 is opened on the surface of the circuit breaker housing 1, a fixing plate 11 is fixedly connected to one side of the first fixing column 12, a limiting rod 9 is slidably sleeved on one side of the fixing plate 11, and a limiting hole 7 is opened on one side of the switch 4.

[0026] See also Figure 3 and Figure 4 A second limiting groove 13 is provided on the surface of the circuit breaker housing 1, and a first mounting plate 16 is fixedly connected to the surface of the circuit breaker housing 1. Two second fixing columns 14 are fixedly connected inside the second limiting groove 13, and a second mounting plate 17 is slidably connected to the surface of the two second fixing columns 14. A screw rod 18 is rotatably connected to the upper end of the second mounting plate 17.

[0027] See also Figure 1 , Figure 2 and Figure 3 , three wiring holes 2 are provided at the upper end of the circuit breaker housing 1, so that the wires are connected to the circuit breaker housing 1 at the wiring holes 2, a plurality of wire fixing holes 3 are provided on the surface of the circuit breaker housing 1, and fixing screws are arranged in the wire fixing holes 3 to fix the wires, and heat absorbing plates 5 are fixedly connected on both sides of the circuit breaker housing 1, and a plurality of heat dissipation holes 6 are provided on the surfaces of the two heat absorbing plates 5. The heat absorbing plates 5 can absorb the heat generated when the circuit breaker is working through the heat dissipation holes 6. Two springs 15 are fixedly connected to the surface of the circuit breaker housing 1. When installing, the guide rail compresses the spring 15, and the spring 15 undergoes elastic deformation to generate an opposite force to make the installation more secure. The upper end of the screw rod 18 passes through the circuit breaker housing 1 and is fixedly connected to a hand wheel 19. Turning the hand wheel 19 can rotate the screw rod 18, and the screw rod 18 can only move downward when rotating. A limit block 10 is fixedly connected to one side of the limit rod 9, and the limit block 10 prevents the limit rod 9 from falling.

[0028] In this embodiment, a first limiting groove 8 is provided on the surface of the circuit breaker housing 1. When the maintenance worker performs power-off maintenance, the switch 4 is disconnected and rotated into the first limiting groove 8, and then the limiting rod 9 is moved so that the limiting rod 9 enters the limiting hole 7 to limit the switch 4 so that the switch 4 cannot be rotated and closed, thereby achieving the function of preventing accidental touch, preventing the maintenance worker from accidentally touching the switch 4 and causing electric shock during maintenance. When installing, the hand wheel 19 is rotated to drive the screw rod 18 to rotate. Because the screw rod 18 is threadedly connected to the circuit breaker housing 1, the screw rod 18 rotates to move downward. Because the second mounting plate 17 is slidably sleeved on the surface of the second fixing column 14, the screw rod 18 moves downward to drive the second mounting plate 17 to move downward, so that the first mounting plate 16 and the second mounting plate 17 are clamped on the mounting guide rail to complete the installation. This device is simple to operate and improves the installation efficiency.

[0029] The working principle of the above embodiment is as follows: when installing, align the first mounting plate 16 and the second mounting plate 17 with the mounting rail and then rotate the hand wheel 19. The rotation of the hand wheel 19 drives the screw rod 18 to rotate. Because the screw rod 18 is threadedly connected to the circuit breaker housing 1, the screw rod 18 rotates to move downward and drive the second mounting plate 17 to move downward together to clamp the mounting rail. When installing, the mounting rail will compress the spring 15, causing the spring 15 to undergo elastic deformation, thereby generating an opposite force to make the installation more secure. By providing a first limiting groove 8 on the surface of the circuit breaker housing 1, when the maintenance worker performs power-off maintenance, the switch 4 is disconnected and the switch 4 is rotated into the first limiting groove 8, and then the limiting rod 9 is moved so that the limiting rod 9 enters the limiting hole 7 to limit the switch 4 so that the switch 4 cannot be rotated and closed. This has the function of preventing accidental touch, thereby preventing the maintenance worker from accidentally touching the switch 4 and causing electric shock during maintenance.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A miniature circuit breaker that is easy to disassemble and assemble, comprising a circuit breaker housing (1), characterized in that: The surface of the circuit breaker housing (1) is rotatably connected to a switch (4); a first fixing column (12) is fixedly connected to one side of the circuit breaker housing (1); a first limiting groove (8) is provided on the surface of the circuit breaker housing (1); a fixing plate (11) is fixedly connected to one side of the first fixing column (12); a limiting rod (9) is slidably connected to one side of the fixing plate (11); and a limiting hole (7) is provided on one side of the switch (4); a second limiting groove (13) is provided on the surface of the circuit breaker housing (1); a first mounting plate (16) is fixedly connected to the surface of the circuit breaker housing (1); two second fixing columns (14) are fixedly connected inside the second limiting groove (13); a second mounting plate (17) is slidably sleeved on the surface of the two second fixing columns (14); a screw rod (18) is rotatably connected to the upper end of the second mounting plate (17).

2. The miniature circuit breaker that is easy to disassemble and assemble according to claim 1, characterized in that: The upper end of the circuit breaker housing (1) is provided with three wiring holes (2).

3. The miniature circuit breaker that is easy to disassemble and assemble according to claim 2, characterized in that: A plurality of wire fixing holes (3) are provided on the surface of the circuit breaker housing (1).

4. The miniature circuit breaker that is easy to disassemble and assemble according to claim 3, characterized in that: Heat absorbing plates (5) are fixedly connected to both sides of the circuit breaker housing (1), and a plurality of heat dissipation holes (6) are provided on the surfaces of the two heat absorbing plates (5).

5. The miniature circuit breaker that is easy to disassemble and assemble according to claim 1, characterized in that: Two springs (15) are fixedly connected to the surface of the circuit breaker housing (1).

6. The miniature circuit breaker that is easy to disassemble and assemble according to claim 1, characterized in that: The upper end of the screw rod (18) passes through the circuit breaker housing (1) and is fixedly connected to a hand wheel (19).

7. The miniature circuit breaker that is easy to disassemble and assemble according to claim 6, characterized in that: One side of the limiting rod (9) is fixedly connected to a limiting block (10).

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