Circuit breaker with terminal protection structure

Abstract

The utility model discloses a circuit breaker with a terminal protection structure, which relates to the technical field of circuit breakers, and comprises a shell body, the shell body comprises a first mounting shell and a second mounting shell which are oppositely arranged, concave parts are arranged between the first mounting shell and the second mounting shell, and a wiring cavity for placing a terminal is formed between the concave parts; the first installation shell and the second installation shell are provided with a first sliding groove and a second sliding groove which are communicated with the wiring cavity respectively, a sliding cavity is formed between the sliding grooves, an insulating part slides in the sliding cavity, and the insulating part is provided with an abutting part penetrating into the wiring cavity. Direct contact between the wire and the fastening bolt exposed to the outside can be avoided through the insulating part, so that the safety of the circuit breaker in the operation process is improved; meanwhile, when the fastening bolt rotates reversely, due to the fact that the fastening bolt is connected with the insulating part, the insulating part can prevent the fastening bolt from falling off in the threaded cavity, and therefore the fastening bolt is prevented from being separated from the circuit breaker, and the fastening bolt is prevented from being lost in the using process.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically, a circuit breaker with a terminal protection structure. Background Technology

[0002] A circuit breaker is an electrical switching device mainly used to automatically cut off or connect current in a circuit to protect the circuit and electrical equipment from damage caused by overload, short circuit or other abnormal conditions. A circuit breaker has a wiring cavity, and the circuit breaker terminals are conductive parts installed in the wiring cavity of the circuit breaker for connecting external circuits. They are the interfaces for connecting the circuit breaker to the power line or load line.

[0003] Using bolts to clamp and fix circuit breaker terminals is a common connection method. Specifically, the fastening bolts are screwed into the screw holes of the terminals to hold the wires in place. Currently, most circuit breaker fastening bolts are directly connected to the live terminals, which poses certain safety hazards when operators work on the circuit breakers. Utility Model Content

[0004] This utility model provides a circuit breaker with a terminal protection structure, which can overcome the defects of existing circuit breakers where the fastening bolts are directly connected to the wires, posing a safety hazard.

[0005] This utility model is implemented as follows: a circuit breaker with a terminal protection structure includes a housing body, a wiring cavity, and fastening bolts. The housing body includes a first mounting shell and a second mounting shell disposed opposite to each other. A recess is provided between the first mounting shell and the second mounting shell, and a wiring cavity for placing terminals is formed between the recesses. The first mounting shell and the second mounting shell are respectively provided with a first sliding groove and a second sliding groove communicating with the wiring cavity, and a sliding cavity is formed between the sliding grooves. An insulating member slides in the sliding cavity, and the insulating member is provided with a pressing part extending into the wiring cavity. The first sliding groove and the second sliding groove are respectively provided with a first threaded groove and a second threaded groove communicating with the outside, and a threaded cavity communicating with the sliding cavity is formed between the first threaded groove and the second threaded groove. A fastening bolt for pushing the pressing part at the insulating member to press against the wire inside the terminal is threaded in the threaded cavity.

[0006] Preferably, the insulating member has an insulating portion located at the opposite end of the abutting portion, and the insulating portion has a mating portion for threaded connection with the fastening bolt along the sliding direction of the insulating member.

[0007] Preferably, the insulating material is insulating polyphenylene sulfide.

[0008] Preferably, the insulating part is rotatably connected to the insulating member.

[0009] Preferably, the threaded cavity is opposite in direction to the thread of the mating portion.

[0010] Preferably, the clamping part has an arc-shaped groove at one end of the terminal that fits against the surface of the wire.

[0011] Preferably, the first sliding groove and the second sliding groove are respectively provided at their upper and lower ends, and a guide cavity is formed between the first guide groove and the second guide groove. A guide part that cooperates with the guide cavity is provided on the outer wall of the insulating component.

[0012] The advantages and technical effects of this utility model are as follows: Compared with the prior art, the insulating component can prevent the wire from directly contacting the exposed fastening bolt, thereby improving the safety of the circuit breaker operation; at the same time, when the fastening bolt is reversed, since the fastening bolt and the insulating component are connected to each other, the insulating component will prevent the fastening bolt from falling out of the thread cavity, thereby preventing the fastening bolt from coming out of the circuit breaker and avoiding the loss of the fastening bolt during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the outer shell body in Embodiment 1 of this utility model;

[0014] Figure 2 This is a top view of the connection between the fastening bolt and the insulating component in Embodiment 1 of this utility model;

[0015] Figure 3 This is a side view of the connection between the fastening bolt and the insulating component in Embodiment 1 of this utility model;

[0016] Figure 4 This is a schematic diagram of the arc-shaped groove in Embodiment 1 of this utility model;

[0017] Figure 5 This is a schematic diagram of a top cross-section of the first mounting shell and the second mounting shell in Embodiment 1 of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms “first”, “second”, etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0021] Therefore, features specified with "first," "second," etc., may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The electrical devices and controllers described in this utility model are all conventional setups, and the electrical connections are also conventional connections.

[0024] like Figure 1-5 As shown, the circuit breaker with terminal protection structure of this utility model includes a housing body 100, a wiring cavity 130, and fastening bolts 250. The housing body 100 includes a first mounting shell 110 and a second mounting shell 120 disposed opposite to each other. A recess is provided between the first mounting shell 110 and the second mounting shell 120, and a wiring cavity 130 for placing terminals is formed between the recesses. The first mounting shell 110 and the second mounting shell 120 are respectively provided with a first sliding groove 211 and a second sliding groove 212 communicating with the wiring cavity 130, and a connection is formed between the sliding grooves. There is a sliding cavity 210, and an insulating member 230 slides in the sliding cavity 210. The insulating member 230 is provided with a clamping part 240 that extends into the wiring cavity 130. The first sliding groove 211 and the second sliding groove 212 are respectively provided with a first threaded groove 511 and a second threaded groove 512 that communicate with the outside. A threaded cavity 510 that communicates with the sliding cavity 210 is formed between the first threaded groove 511 and the second threaded groove 512. A fastening bolt 250 for pushing the clamping part 240 at the insulating member 230 to abut against the wire in the terminal is threadedly connected in the threaded cavity 510.

[0025] An insulating portion 410 is provided on the insulating member 230 at the opposite end of the abutment portion 240. The insulating portion 410 has a mating portion 420 formed along the sliding direction of the insulating member 230 for threaded connection with the fastening bolt 250. The insulating portion 410 is made of insulating polyphenylene sulfide. It can isolate the electrical conduction between the fastening bolt and the wire.

[0026] The insulating part 410 is rotatably connected to the insulating component 230. The threaded cavity 510 and the mating part 420 have opposite thread directions. The clamping part 240 has an arc-shaped groove 430 at one end of the terminal that fits against the surface of the wire.

[0027] The first sliding groove 211 and the second sliding groove 212 are respectively provided with a first guide groove 521 and a second guide groove 522 at their upper and lower ends, and a guide cavity 520 is formed between the first guide groove 521 and the second guide groove 522. The outer wall of the insulating member 230 is provided with a guide part 340 that cooperates with the guide cavity 520.

[0028] Example 1

[0029] like Figure 1-5 As shown, this embodiment provides a circuit breaker with a terminal protection structure, including a housing body 100, a wiring cavity 130, and fastening bolts 250. The housing body 100 includes a first mounting shell 110 and a second mounting shell 120 disposed opposite to each other. A recess is provided between the first mounting shell 110 and the second mounting shell 120, and a wiring cavity 130 for placing terminals is formed between the recesses. A first sliding groove 211 and a second sliding groove 212 communicating with the wiring cavity 130 are respectively provided at the first mounting shell 110 and the second mounting shell 120, and a connection is formed between the sliding grooves. There is a sliding cavity 210, and an insulating member 230 slides in the sliding cavity 210. The insulating member 230 is provided with a clamping part 240 that extends into the wiring cavity 130. The first sliding groove 211 and the second sliding groove 212 are respectively provided with a first threaded groove 511 and a second threaded groove 512 that communicate with the outside. A threaded cavity 510 that communicates with the sliding cavity 210 is formed between the first threaded groove 511 and the second threaded groove 512. A fastening bolt 250 for pushing the clamping part 240 at the insulating member 230 to abut against the wire in the terminal is threadedly connected in the threaded cavity 510.

[0030] With the above structure, when it is necessary to tighten the wires installed in the terminals within the wiring cavity 130, rotating the fastening bolt 250 will push the insulating member 230 in the sliding cavity 210 towards the wiring cavity 130, causing the clamping part 240 to penetrate into the screw hole of the terminal and clamp the wires. During this process, the insulating part 410 on the insulating member 230 will prevent the fastening bolt 250 from directly contacting the wires. At the same time, when it is necessary to adjust the wires in the terminals, simply rotate the fastening bolt 250 in the opposite direction. Compared with the prior art, the insulating member 230 can prevent the wires from directly contacting the exposed fastening bolt 250, thereby improving the safety during circuit breaker operation. Meanwhile, when the fastening bolt 250 is reversed, since the fastening bolt 250 and the insulating member 230 are connected to each other, the insulating member 230 will prevent the fastening bolt 250 from falling out of the threaded cavity 510, thereby preventing the fastening bolt 250 from leaving the circuit breaker and avoiding loss of the fastening bolt 250 during use.

[0031] Combination Figure 2-5 As shown, in this embodiment, the insulating part 230 is provided with an insulating part 410 at the opposite end of the abutment part 240. The insulating part 410 has a mating part 420 for threaded connection with the fastening bolt 250 along the sliding direction of the insulating part 230. The insulating part 410 is made of insulating polyphenylene sulfide. The insulating part 410 is rotatably connected to the insulating part 230. The threaded cavity 510 and the mating part 420 have opposite thread directions.

[0032] With the above structure, the insulating part 410 is made of insulating polyphenylene sulfide. Rotating the fastening bolt 250 into the mating part 420 inside the insulating part 410 can achieve a quick connection between the fastening bolt 250 and the insulating component 230, while also isolating the fastening bolt 250 from the wire. As the fastening bolt 250 rotates in the threaded cavity 510, it drives the insulating component 230 to slide in the sliding cavity 210. At the same time, the insulating part 410 and the insulating component 230 rotate, thereby preventing the insulating component 230 from rotating with the fastening bolt 250 and improving the stability of the pressing part 240 on the wire. When the fastening bolt 250 is rotated outward to its limit, the thread direction of the threaded cavity 510 and the mating part 420 is opposite, which can prevent the fastening bolt 250 from disengaging from the mating part 420 and further improve the stability of the connection between the fastening bolt 250 and the insulating component 230, preventing the fastening bolt 250 from disengaging from the circuit breaker.

[0033] Combination Figure 2-5As shown, in this embodiment, the first sliding groove 211 and the second sliding groove 212 are respectively provided with a first guide groove 521 and a second guide groove 522 at their upper and lower ends, and a guide cavity 520 is formed between the first guide groove 521 and the second guide groove 522. The outer wall of the insulating member 230 is provided with a guide portion 340 that cooperates with the guide cavity 520. The abutting portion 240 is located at one end of the terminal and has an arc-shaped groove 430 that fits against the surface of the wire.

[0034] With the above structure, when the insulating member 230 slides in the sliding cavity 210, the guide portion 340 on the insulating member 230 will slide on the guide cavity 520 composed of the first guide groove 521 and the second guide groove 522, thereby preventing the insulating member 230 from rotating when sliding in the sliding cavity 210, further improving the stability of the pressing portion 240 on the insulating member 230 pressing against the wire. At the same time, the guide cavity 520 will limit the sliding distance of the insulating member 230 towards the wiring cavity 130, avoiding excessive pressing of the pressing portion 240 against the wire. Meanwhile, the arc groove 430 will increase the contact area between the pressing portion 240 and the wire, ensuring the stability of the pressing portion 240 pressing against the wire.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circuit breaker with a terminal protection structure, comprising a housing body (100), a wiring cavity (130), and fastening bolts (250), characterized in that, The outer casing (100) includes a first mounting shell (110) and a second mounting shell (120) disposed opposite to each other. A recess is provided between the first mounting shell (110) and the second mounting shell (120), and a wiring cavity (130) for placing terminals is formed between the recesses. The first mounting shell (110) and the second mounting shell (120) are respectively provided with a first sliding groove (211) and a second sliding groove (212) communicating with the wiring cavity (130), and a sliding cavity (210) is formed between the sliding grooves. An insulating member (230) slides in the sliding cavity (210), and the insulating member (230) is provided with a pressing part (240) extending into the wiring cavity (130). The first sliding groove (211) and the second sliding groove (212) are respectively provided with a first threaded groove (511) and a second threaded groove (512) communicating with the outside. A threaded cavity (510) communicating with the sliding cavity (210) is formed between the first threaded groove (511) and the second threaded groove (512). A fastening bolt (250) for pushing the abutting part (240) at the insulating part (230) to abut against the wire inside the terminal is threaded in the threaded cavity (510).

2. The circuit breaker with terminal protection structure according to claim 1, characterized in that, The insulating member (230) is provided with an insulating part (410) at the opposite end of the abutment part (240), and the insulating part (410) has a mating part (420) for threaded connection with the fastening bolt (250) along the sliding direction of the insulating member (230).

3. The circuit breaker with terminal protection structure according to claim 2, characterized in that, The insulating part (410) is made of insulating polyphenylene sulfide.

4. The circuit breaker with terminal protection structure according to claim 2, characterized in that, The insulating part (410) is rotatably connected to the insulating component (230).

5. The circuit breaker with terminal protection structure according to claim 1 or 3, characterized in that, The threaded cavity (510) has the opposite thread direction to the mating part (420).

6. The circuit breaker with terminal protection structure according to claim 1, characterized in that, The abutting part (240) has an arc-shaped groove (430) at one end of the terminal that fits against the surface of the wire.

7. The circuit breaker with terminal protection structure according to claim 1, characterized in that, The first sliding groove (211) and the second sliding groove (212) are respectively provided with a first guide groove (521) and a second guide groove (522) at their upper and lower ends, and a guide cavity (520) is formed between the first guide groove (521) and the second guide groove (522). A guide part (340) that cooperates with the guide cavity (520) is provided on the outer wall of the insulating member (230).

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