Residual-current circuit breaker shell with locking structure

Abstract

A residual-current circuit breaker shell with a locking structure comprises a plurality of shell bodies spliced together, each shell body is provided with an installation hole used for installing a cylindrical pin with a cap, the outer side wall of the shell body located on the rightmost side is provided with a locking unit, and one end of a rod portion of the cylindrical pin with the cap extends out of the installation hole and is provided with a locking hole. The locking hole is used for being combined with the locking unit, after combination, the locking unit exists on the moving track of the capped cylindrical pin, and the locking unit moves through rotation so that the locking unit can enter or leave the locking hole. The beneficial effects of the utility model lie in that the capped cylindrical pin and the locking unit are used as a locking structure for stably splicing all the shells together, the locking unit and the capped cylindrical pin are locked or unlocked only by rotating the locking unit, and the locking unit can move synchronously when rotating, so that the locking unit can be locked or unlocked. By means of the mode, tools are not needed, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a leakage circuit breaker housing with a locking structure. Background Art

[0002] Leakage circuit breakers are mainly used to protect against leakage faults in equipment and fatal electric shocks to people. They have overload and short - circuit protection functions, can be used to protect circuits or motors from overload and short - circuit, and can also be used for infrequent line conversion and startup under normal circumstances.

[0003] Currently, the housings of existing leakage circuit breakers on the market are composed of multiple shells that are joined together, and after joining, bolts and nuts are used for fixation to maintain the joined state of the multiple shells. However, this method is rather cumbersome and requires tools. That is, during the assembly or disassembly stage, one hand needs to hold the nut while the other hand operates a screwdriver to keep the nut stationary when the bolt rotates so that the bolt can smoothly enter or disengage from the nut, and there is more than one such locking structure. Summary of the Utility Model

[0004] The utility model aims to solve the above - mentioned drawbacks of the prior art and provides a leakage circuit breaker housing with a locking structure to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems: This leakage circuit breaker housing with a locking structure includes several shells joined together. The shells are provided with mounting holes for installing cap - type cylindrical pins. A locking unit is arranged on the outer side wall of the right - most shell. One end of the rod part of the cap - type cylindrical pin extends outside the mounting hole and is provided with a locking hole, which is used to combine with the locking unit. After combination, the locking unit is located on the moving track of the cap - type cylindrical pin. The locking unit moves by rotation to enter or leave the locking hole.

[0006] Further improvement: The locking unit includes a fixed seat and two operating rods. The fixed seat is located at the middle position between two cap - type cylindrical pins. One end of the operating rod is provided with a connecting part and is rotatably connected inside the fixed seat, and the other end is provided with a locking part and combines with the locking hole. When the connecting part rotates, the operating rod moves.

[0007] Further improvement: The connecting part is set as a rod - shaped member, its outer diameter is smaller than that of the operating rod, and an external thread is provided on its outer peripheral surface. An internal - thread hole combined with the connecting part is provided inside the fixed seat.

[0008] Further improvement: Extension parts are provided on the outer peripheral surface of the fixed seat at both ends of the internal - thread hole.

[0009] Further improvement: The locking part is set as a rod - shaped member, and its outer diameter is the same as the inner diameter of the locking hole.

[0010] Further improved, when the locking part is combined with the locking hole, the end face of the operating rod abuts against the outer peripheral surface of the caped cylindrical pin.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The present utility model uses the caped cylindrical pin and the locking unit as the locking structure that enables each housing to be stably assembled together. When the locking unit is locked or unlocked with the caped cylindrical pin, only a rotating operation needs to be performed on it. When it rotates, it will move synchronously, so as to achieve combination or separation from the caped cylindrical pin. Such a method does not require tools and improves the assembly efficiency. Description of the Drawings

[0013] Figure 1 is a schematic structural view of the present utility model;

[0014] Figure 2 is a schematic structural view of the rightmost housing of the present utility model. Detailed Embodiments

[0015] The present utility model will be further described below in conjunction with the drawings:

[0016] Referring to the drawings: There are several housings 1 assembled together. An installation hole 3 for installing the caped cylindrical pin 2 is provided on the housing 1. A locking unit 4 is provided on the outer side wall of the rightmost housing 1. One end of the rod portion of the caped cylindrical pin 2 extends outside the installation hole 3 and is provided with a locking hole 21. The locking hole 21 is used to combine with the locking unit 4, and after combination, the locking unit 4 is located on the moving track of the caped cylindrical pin 2. The locking unit 4 moves by rotation to enter or leave the locking hole 21. The principle of the present utility model is that after the caped cylindrical pin 2 is inserted into the installation hole 3, the end with the locking hole 21 is exposed outside the installation hole 3. Then, by rotating the locking unit 4, it moves. The locking unit 4 moves into the locking hole 21 and combines with it, so that the locking unit 4 is located on the moving track of the caped cylindrical pin 2, thereby preventing the caped cylindrical pin 2 from detaching from the installation hole 3 and keeping the multiple housings 1 assembled together. When disassembling, rotating the locking unit 4 in the reverse direction can make the locking unit 4 withdraw from the locking hole 21. Such a method does not require tools and improves the assembly efficiency.

[0017] The locking unit 4 includes a fixed seat 41 and two operating rods 42. The fixed seat 41 is located at the central position between the two caped cylindrical pins 2. One end of the operating rod 42 is provided with a connecting portion 42-a and is rotatably connected to the inside of the fixed seat 41, and the other end is provided with a locking portion 42-b which is combined with the locking hole 21. When the connecting portion 42-a rotates, the operating rod 42 moves. The fixed seat 41 is integrally formed on the rightmost housing 1, which is used to connect with the connecting portion 42-a of the operating rod 42 to realize the rotation of the operating rod 42, so that the operating rod 42 realizes movement by rotation. The locking portion 42-b is used to be combined with the locking hole 21. Such a method can be achieved through one operating rod 42. The user can operate the operating rod 42, which is convenient and fast.

[0018] The connecting portion 42-a is set as a rod-shaped member, whose outer diameter is smaller than that of the operating rod 42, and an external thread is provided on the outer peripheral surface. An internal thread hole 41-a combined with the connecting portion 42-a is provided inside the fixed seat 41. Rotation can be triggered to cause movement through the way of thread cooperation, and the thread has self-locking property, that is, it will not rotate by itself and there will be no movement during rotation without manual operation. In this way, the operating rod 42 and the caped cylindrical pin 2 can always maintain the combined state after combination.

[0019] Extension portions 41-a1 are provided on the outer peripheral surface of the fixed seat 41 at both ends of the internal thread hole 41-a. In this way, the wrapping length of the connecting portion 42-a is increased, so that the stability of the connecting portion 42-a during rotation and when rotation stops (the locking portion 42-b is combined with the locking hole 21) can be increased. Especially, increasing the stability of the connecting portion 42-a during rotation can avoid the situation of its shaking (shaking is easy to cause thread misalignment).

[0020] The locking portion 42-b is set as a rod-shaped member, whose outer diameter is the same as the inner diameter of the locking hole 21. In this way, the caped cylindrical pin 2 will not move due to the dimensional difference after the locking hole 21 and the locking portion 42-b are combined. In this way, the clamping force for clamping each housing 1 is jointly generated by the locking hole 21, the locking portion 42-b and the cap portion of the combined caped cylindrical pin 2, so as to ensure the firmness of the combination of each housing 1.

[0021] When the locking portion 42-b is combined with the locking hole 21, the end face of the operating rod 42 abuts against the outer peripheral surface of the caped cylindrical pin 2. When the end face of the operating rod 42 abuts against the outer peripheral surface of the caped cylindrical pin 2, the forward rotation of the operating rod 42 can be blocked, so as to realize complete locking.

[0022] Although the present utility model has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details can be made within the scope of the claims.

Claims

1. A leakage circuit breaker housing with a locking structure, comprising a plurality of housings (1) assembled together, wherein the housings (1) are provided with mounting holes (3) for mounting cylindrical pins with caps (2), characterized in that: A locking unit (4) is provided on the outer side wall of the housing (1) located at the far right, one end of the rod of the capped cylindrical pin (2) extends outside the mounting hole (3) and is provided with a locking hole (21), the locking hole (21) being used to combine with the locking unit (4), and after the combination, the locking unit (4) is located on the moving track of the capped cylindrical pin (2), and the locking unit (4) is moved by rotating so as to enter or leave the locking hole (21).

2. The leakage circuit breaker housing with a locking structure according to claim 1, characterized in that: The locking unit (4) comprises a fixing seat (41) and two operating rods (42); the fixing seat (41) is located at a central position between the two capped cylindrical pins (2); one end of the operating rod (42) is provided with a connecting portion (42-a) and is rotatably connected to the fixing seat (41); the other end of the operating rod (42) is provided with a locking portion (42-b) and is combined with the locking hole (21); when the connecting portion (42-a) rotates, the operating rod (42) moves.

3. The leakage circuit breaker housing with a locking structure according to claim 2, characterized in that: The connecting portion (42-a) is configured as a rod-shaped component, the outer diameter of which is smaller than the outer diameter of the operating rod (42), and an outer peripheral surface is provided with an external thread, and the fixing seat (41) is provided with an internal thread hole (41-a) combined with the connecting portion (42-a).

4. The leakage circuit breaker housing with a locking structure according to claim 3, characterized in that: Both ends of the internal threaded hole (41-a) are provided with extension portions (41-a1) on the outer peripheral surface of the fixing seat (41).

5. The leakage circuit breaker housing with a locking structure according to claim 2, characterized in that: The locking portion (42-b) is configured as a rod-shaped member, the outer diameter of which is consistent with the inner diameter of the locking hole (21).

6. The leakage circuit breaker housing with a locking structure according to claim 5, characterized in that: When the locking portion (42-b) is combined with the locking hole (21), the end surface of the operating rod (42) abuts against the outer peripheral surface of the capped cylindrical pin (2).

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