A drawer-type circuit breaker and its connecting bar

Abstract

This application relates to a drawer-type circuit breaker and its connecting block, which includes a housing. A circuit breaker body is movably connected to the front outer surface of the housing. A limiting member is fixedly connected to the lower inner surface of the housing. A limiting protrusion assembly is fixedly connected to the lower outer surface of the circuit breaker body. A terminal block is provided on the left outer surface of the limiting member. This application features a sophisticated mechanical interlocking mechanism composed of the limiting member, the limiting protrusion assembly, and the limiting hole on the terminal block, comprehensively solving the inherent defects of traditional drawer-type circuit breakers in terms of positioning reliability, operational safety, and maintenance convenience. Specifically, when the circuit breaker body moves along the housing, the limiting protrusion assembly fixed to its lower end moves accordingly; the hemispherical locking block in this assembly, under the continuous pressure of the spring, can accurately and automatically engage with the preset limiting hole on the terminal block, achieving the effect of no additional tools or complex operations.

Description

Technical Field

[0001] This application relates to the technical field of power equipment, and in particular to a drawer-type circuit breaker and its connecting bar. Background Technology

[0002] Under normal circumstances, a circuit breaker can connect, carry, and disconnect the rated operating current, and can safely isolate the power supply when the line or equipment needs maintenance. When an abnormal current occurs in the circuit, its internal tripping mechanism will detect the fault and trigger the action, causing the moving and stationary contacts to separate quickly, thereby achieving the purpose of disconnecting the circuit. After the fault is cleared, manual or electric reset is required to restore normal power supply.

[0003] In existing technologies, there is room for improvement in the connection and positioning structure between the circuit breaker body and the terminal block. Common structures often use simple plug-in or bolt fixing methods, which are prone to gaps due to wear after repeated plugging and unplugging, leading to poor contact, increased resistance, and even overheating. At the same time, the limit mechanism used to ensure that the circuit breaker is accurately locked in a specific position, such as the test position, is often complex in structure or has insufficient locking reliability. When subjected to vibration or misoperation, there may be a risk of accidental dislocation, which will affect operational safety and equipment stability. In addition, existing limit structures are usually not convenient enough when unlocking is required, which is not conducive to quick state transition or maintenance. Utility Model Content

[0004] To improve practicality, this application provides a drawer-type circuit breaker and its connecting bar.

[0005] This application provides a drawer-type circuit breaker and its connecting block, which adopts the following technical solution: A drawer-type circuit breaker and its connecting bar include a housing, a circuit breaker body movably connected to the front outer surface of the housing, a limiting member fixedly connected to the lower inner surface of the housing, a limiting protrusion assembly fixedly connected to the lower outer surface of the circuit breaker body, a terminal block provided on the left outer surface of the limiting member, and a limiting hole adapted to the limiting protrusion assembly on the left outer surface of the terminal block.

[0006] As a preferred embodiment of this application, the limiting protrusion assembly includes a circular sleeve, a movable rod is movably connected to the left outer surface of the circular sleeve, a circular disc is fixedly connected to the right outer surface of the movable rod, a hemispherical snap-fit ​​block is fixedly connected to the front outer surface of the movable rod, and a spring is provided between the hemispherical snap-fit ​​block and the circular sleeve.

[0007] As a preferred embodiment of this application, the left outer surface of the limiting member is provided with a circular mounting groove that is adapted to the limiting protrusion assembly, and the limiting member is fixedly connected to the limiting protrusion assembly through the circular mounting groove.

[0008] As a preferred embodiment of this application, a rectangular slide rail adapted to the limiting member is provided on the lower outer surface of the terminal block, and the terminal block is movably connected to the limiting member through the rectangular slide rail.

[0009] As a preferred embodiment of this application, a handle is fixedly connected to the front outer surface of the circuit breaker body, and the number of handles is two.

[0010] As a preferred embodiment of this application, a side movable block is movably connected to the left outer surface of the housing, and a rectangular pressing block is fixedly connected to the right outer surface of the side movable block. The rectangular pressing block is located on the left side of the limiting protrusion assembly.

[0011] As a preferred embodiment of this application, the outer surface of the front end of the housing is provided with a rectangular opening adapted to the circuit breaker body, and the housing is movably connected to the circuit breaker body through the rectangular opening.

[0012] As a preferred embodiment of this application, a strip-shaped movable groove adapted to the side movable block is provided on the left outer surface of the housing, and the housing is movably connected to the side movable block through the strip-shaped movable groove.

[0013] In summary, this application includes at least one of the following beneficial technical effects: This application comprehensively solves the inherent defects of traditional drawer-type circuit breakers in terms of positioning reliability, operational safety, and maintenance convenience through a sophisticated mechanical interlocking mechanism consisting of a limiting component, a limiting protrusion assembly, and a limiting hole on the terminal block. Specifically, when the circuit breaker body is pushed along the outer casing, the limiting protrusion assembly fixed at its lower end moves accordingly; the hemispherical locking block in this assembly can accurately and automatically engage with the preset limiting hole on the terminal block under the continuous pressure of the spring. This process can reliably lock the circuit breaker in working positions such as "test" or "connection" without the need for additional tools or complex operations. This rigid snap-fit ​​connection effectively avoids accidental dislocation caused by vibration or accidental contact, greatly improving the stability and safety of the equipment during operation. At the same time, this limiting mechanism is coordinated with the insertion action of the main circuit contacts, forming a mechanical interlock. This ensures that the main circuit can only be fully connected when the circuit breaker body accurately reaches the designated position and is reliably locked. Conversely, it cannot be pushed in when the circuit breaker is in the unlocked state, thus fundamentally preventing dangerous misoperations such as plugging and unplugging under load, and complying with strict safety regulations.

[0014] When unlocking is required to change states or pull out the circuit breaker for maintenance, the operator only needs to press the side movable block from the outside of the housing. This allows the rectangular pressing block on the inside to directly push the movable rod, overcoming spring pressure and allowing the hemispherical locking block to easily exit from the limiting hole. The entire unlocking action can be completed with one hand, making it simple, quick, and labor-saving, significantly improving maintenance efficiency. Furthermore, this limiting protrusion assembly is constructed using standard components such as a circular sleeve, spring, and movable rod, resulting in a compact and durable structure. The spring preload ensures a tight contact between the hemispherical locking block and the limiting hole, effectively compensating for wear gaps that may result from frequent insertions and removals. This avoids increased contact resistance and overheating caused by loosening, extending the service life of the entire connector.

[0015] In summary, this application achieves multiple beneficial effects simultaneously, including precise positioning, reliable locking, safe interlocking, and convenient operation, with a simple and efficient mechanical structure, demonstrating significant practical value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a structural schematic diagram of the limiting component in this application. Figure 3 This is a structural schematic diagram of the terminal block in this application; Figure 4 This is a structural schematic diagram of the limiting protrusion assembly in this application.

[0017] Explanation of reference numerals in the attached drawings: 1. Housing; 101. Side movable block; 2. Circuit breaker body; 201. Handle; 3. Limiting component; 4. Limiting protrusion assembly; 401. Circular sleeve; 402. Circular disc; 403. Movable rod; 404. Hemispherical locking block; 405. Spring; 5. Terminal block. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0019] See Figure 1-4A circuit breaker body 2 is movably connected to the front outer surface of the outer casing 1. A limiting member 3 is fixedly connected to the lower inner surface of the outer casing 1. A limiting protrusion assembly 4 is fixedly connected to the lower outer surface of the circuit breaker body 2. A terminal block 5 is provided on the left outer surface of the limiting member 3. A limiting hole adapted to the limiting protrusion assembly 4 is opened on the left outer surface of the terminal block 5. The limiting protrusion assembly 4 includes a circular sleeve 401. A movable rod 403 is movably connected to the left outer surface of the circular sleeve 401. A circular disc 402 is fixedly connected to the right outer surface of the movable rod 403. A hemispherical locking block 404 is fixedly connected to the front outer surface of the movable rod 403. A spring 405 is provided between the hemispherical locking block 404 and the circular sleeve 401. A circular mounting groove adapted to the limiting protrusion assembly 4 is opened on the left outer surface of the limiting member 3. The limiting member 3 is fixedly connected to the limiting protrusion assembly 4 through the circular mounting groove.

[0020] When the circuit breaker body 2 needs to be pushed into the housing 1 to a working position such as "test" or "connect," the operator applies a pushing force through the handle 201. As the circuit breaker body 2 moves, the limiting protrusion assembly 4 fixed to its lower end moves forward together. When the hemispherical locking block 404 at the front end of the assembly contacts the left side surface of the terminal block 5, it compresses the spring 405 backward under the action of the inclined plane or pressure, causing the movable rod 403 to retract within the circular sleeve 401. Once the hemispherical locking block 404 moves to a position aligned with the limiting hole on the terminal block 5, the elastic potential energy stored in the spring 405 is immediately released, pushing the hemispherical locking block 404 to quickly and accurately engage in the limiting hole. This "click" locking action not only provides the operator with clear tactile and audible feedback on the positioning, but also achieves a mechanical rigid lock between the circuit breaker body 2 and the terminal block 5, effectively preventing it from dislodging under vibration or accidental pulling, ensuring the stability and reliability of the working position.

[0021] The lower outer surface of the terminal block 5 is provided with a rectangular slide that is adapted to the limiting member 3. The terminal block 5 is movably connected to the limiting member 3 through the rectangular slide. The front outer surface of the circuit breaker body 2 is fixedly connected with a handle 201. There are two handles 201. The left outer surface of the outer shell 1 is movably connected with a side movable block 101. The right outer surface of the side movable block 101 is fixedly connected with a rectangular pressing block. The rectangular pressing block is located on the left side of the limiting protrusion assembly 4.

[0022] The outer surface of the front end of the housing 1 is provided with a rectangular opening that is adapted to the circuit breaker body 2. The housing 1 is movably connected to the circuit breaker body 2 through the rectangular opening. The outer surface of the left side of the housing 1 is provided with a strip-shaped movable groove that is adapted to the side movable block 101. The housing 1 is movably connected to the side movable block 101 through the strip-shaped movable groove.

[0023] When it is necessary to remove the circuit breaker body 2 from its working position, such as to the "disconnected" position or for maintenance, the operator pushes the side movable block 101 inward from the outside of the housing 1. The side movable block 101 moves along the strip movable groove, and the rectangular pressing block on its right side moves forward accordingly, directly pressing against the left side of the hemispherical locking block 404 of the limiting protrusion assembly 4. This thrust overcomes the elastic force of the spring 405, forcing the hemispherical locking block 404 to completely disengage from the limiting hole of the terminal block 5, thereby unlocking. At this time, under the restoring force of the spring 405, the entire limiting protrusion assembly 4 remains in the unlocked state. The operator can then smoothly pull the circuit breaker body 2 out of the housing 1 using the handle 201. The entire unlocking process requires no tools and can be easily completed with one hand, greatly improving operational efficiency and convenience.

[0024] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drawer-type circuit breaker and its connecting bar, comprising a housing (1), characterized in that: The front outer surface of the housing (1) is movably connected to the circuit breaker body (2), the lower inner surface of the housing (1) is fixedly connected to the limiting member (3), the lower outer surface of the circuit breaker body (2) is fixedly connected to the limiting protrusion assembly (4), the left outer surface of the limiting member (3) is provided with a terminal block (5), and the left outer surface of the terminal block (5) is provided with a limiting hole that is adapted to the limiting protrusion assembly (4).

2. The drawer-type circuit breaker and its connecting bar according to claim 1, characterized in that: The limiting protrusion assembly (4) includes a circular sleeve (401), a movable rod (403) is movably connected to the left outer surface of the circular sleeve (401), a circular disc (402) is fixedly connected to the right outer surface of the movable rod (403), a hemispherical snap-fit ​​block (404) is fixedly connected to the front outer surface of the movable rod (403), and a spring (405) is provided between the hemispherical snap-fit ​​block (404) and the circular sleeve (401).

3. A drawer-type circuit breaker and its connecting bar according to claim 1, characterized in that: The left outer surface of the limiting member (3) is provided with a circular mounting groove that is compatible with the limiting protrusion assembly (4), and the limiting member (3) is fixedly connected to the limiting protrusion assembly (4) through the circular mounting groove.

4. A drawer-type circuit breaker and its connecting bar according to claim 1, characterized in that: The lower outer surface of the terminal block (5) is provided with a rectangular slide that is compatible with the limiting member (3), and the terminal block (5) is movably connected to the limiting member (3) through the rectangular slide.

5. A drawer-type circuit breaker and its connecting bar according to claim 1, characterized in that: The circuit breaker body (2) has a handle (201) fixedly connected to its front outer surface, and there are two handles (201).

6. A drawer-type circuit breaker and its connecting bar according to claim 1, characterized in that: A side movable block (101) is movably connected to the left outer surface of the outer shell (1), and a rectangular pressing block is fixedly connected to the right outer surface of the side movable block (101). The rectangular pressing block is located on the left side of the limiting protrusion assembly (4).

7. A drawer-type circuit breaker and its connecting bar according to claim 1, characterized in that: The outer surface of the front end of the housing (1) is provided with a rectangular opening that is compatible with the circuit breaker body (2). The housing (1) is movably connected to the circuit breaker body (2) through the rectangular opening.

8. A drawer-type circuit breaker and its connecting bar according to claim 1, characterized in that: The outer left side surface of the outer shell (1) is provided with a strip-shaped movable groove that is adapted to the side movable block (101). The outer shell (1) is movably connected to the side movable block (101) through the strip-shaped movable groove.

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