Molded case circuit breaker

Abstract

The utility model relates to the field of circuit breakers, in particular to a molded case circuit breaker. Comprising a shell, the shell comprises a front cover plate and a mounting seat, the shell is provided with an operating handle used for disconnecting and closing a circuit, and the operating handle is provided with a pressing part; the front cover plate and the mounting seat are fixed through a fixing assembly arranged on the mounting seat; the fixing assembly comprises a control component which is vertically arranged on the mounting base in a sliding mode, a reset spring is arranged between the control component and the mounting base, and two guide grooves are formed in the control component. The ends, in the same direction, of the two fixing claws are hinged to the installation base at the same time, the two fixing claws are matched to form a fixing hole, a fixing rod matched with the fixing hole is arranged on the front cover plate, a guide rod is further arranged on the fixing claws, and the guide rod is arranged in the guide groove in a sliding mode; when the operation handle executes circuit disconnection, the pressing part presses the control component to separate the two fixing claws; according to the utility model, the front cover plate can be prevented from being opened under a power-on condition.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, and more particularly to a molded case circuit breaker. Background Technology

[0002] Molded case circuit breakers are a widely used electrical protection device whose main function is to protect electrical systems from overloads, short circuits and other abnormal conditions.

[0003] When a molded case circuit breaker is installed in a circuit, and the circuit breaker is closed, someone may improperly remove the front cover for maintenance or repair, which could be dangerous. Therefore, it is necessary to prevent the molded case circuit breaker from being opened when the circuit is closed.

[0004] Therefore, there is an urgent need to provide an improved technical solution to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a lockable molded case circuit breaker.

[0006] In view of this, the present invention provides a molded case circuit breaker, comprising:

[0007] The housing includes a front cover and a mounting base, and is provided with an operating handle for disconnecting and closing the circuit, and the operating handle is provided with a pressing part;

[0008] The front cover and the mounting base are secured by a fixing assembly mounted on the mounting base;

[0009] The fixed components include:

[0010] The control component is vertically slidably mounted on the mounting base and a return spring is provided between the control component and the mounting base. Two guide grooves are provided on the control component.

[0011] Two fixing claws, with their ends in the same direction, are simultaneously hinged to the mounting base. The two fixing claws cooperate to form a fixing hole. A fixing rod that cooperates with the fixing hole is provided on the front cover plate, and a guide rod is also provided on the fixing claw. The guide rod is slidably set in the guide groove.

[0012] When the operating handle disconnects the circuit, the pressing part presses the control member, causing the two fixed claws to separate.

[0013] Furthermore, the fixing components are symmetrically arranged on both sides of the mounting base.

[0014] Furthermore, it also includes a limiting slide rod, which is fixed on the mounting base. The control component has a socket hole that mates with the limiting slide rod. A return spring is fitted on the limiting slide rod, and a limiting screw is provided at the top of the limiting slide rod.

[0015] Furthermore, the pressing part includes:

[0016] Press the crossbar, and the end of the crossbar is rotated and inserted into the control component;

[0017] The hinged link is hinged at one end to the operating handle and fixed at the other end to the pressing crossbar.

[0018] Furthermore, at least three limit slides are provided to cooperate with a control component.

[0019] Furthermore, the ends of the two fixing claws are provided with opposing inclined surfaces. When the fixing rod abuts against the inclined surfaces, the fixing claws can be opened by the abutting movement, allowing the fixing rod to enter the fixing hole.

[0020] The beneficial effects of this utility model are:

[0021] 1. When the operating handle is rotated from bottom to top (powered on), the pressing part moves away from the control component. The control component returns to its original position under the action of the return spring, causing the fixing claw to close and preventing the front cover from opening when powered on.

[0022] 2. In this utility model, a return spring is sleeved on the limiting slide rod, and a limiting screw for limiting is provided at the top of the limiting slide rod. The limiting screw prevents the control component from coming off the limiting slide rod. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the fixing component of this utility model;

[0025] Figure 3 This is a schematic diagram showing the positional structure of the pressing part and control component of the operating handle in two positions according to this utility model.

[0026] The markings in the diagram are as follows:

[0027] 1. Outer shell; 2. Front cover plate; 3. Mounting base; 5. Operating handle; 6. Control component; 7. Guide groove; 8. Guide rod; 9. Fixing claw; 10. Fixing hole; 11. Limiting slide bar; 12. Limiting screw; 13. Hinge connecting rod; 14. Pressing crossbar. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0029] Example 1:

[0030] This embodiment provides a molded case circuit breaker, including:

[0031] include:

[0032] The housing 1 includes a front cover plate 2 and a mounting base 3, and the housing 1 is provided with an operating handle 5 for disconnecting and closing the circuit, and the operating handle 5 is provided with a pressing part;

[0033] The front cover 2 and the mounting base 3 are fixed by a fixing component provided on the mounting base 3;

[0034] The fixed components include:

[0035] The control component 6 is vertically slidably mounted on the mounting base 3 and a return spring is provided between the control component 6 and the mounting base 3. Two guide grooves 7 are provided on the control component 6.

[0036] Two fixing claws 9, with their ends in the same direction, are simultaneously hinged to the mounting base 3. The two fixing claws 9 cooperate to form a fixing hole 10. A fixing rod that cooperates with the fixing hole 10 is provided on the front cover plate 2. A guide rod 8 is also provided on the fixing claws 9. The guide rod 8 is slidably disposed in the guide groove 7.

[0037] When the operating handle 5 disconnects the circuit, the pressing part presses the control member 6, causing the two fixing claws 9 to separate.

[0038] The outer casing 1 typically includes two parts: a mounting base 3 for mounting all components and a front cover 2 that makes the outer casing 1 a closed space. The front cover 2 has a reserved hole for placing the operating handle 5. The circuit is opened and closed by rotating the operating handle 5. There are many types of structures in the prior art circuit breakers. Any structure with the operating handle 5 is acceptable. Its structure will not be described in detail in this embodiment.

[0039] The front cover 2 and the mounting base 3 are fixed by a fixing assembly on the mounting base 3. The fixing assembly includes a control component 6, which is a frame structure. In this embodiment, a square frame structure is used. A rod can be provided on the lower end face of the square frame and inserted into the front end face of the side wall of the mounting base 3. A limiting flange is provided at the end of the rod to prevent it from falling out. A spring is sleeved on the rod and placed between the control component 6 and the mounting base 3 to allow the control component 6 to reset. Guide grooves 7 are provided on both sides of the control component 6, and the guide grooves 7 are horizontally positioned. Two fixing claws 9 The two fixing claws 9 are simultaneously hinged at the ends near the mounting base 3, forming a fixing hole 10. When the cover plate 2 is installed, the fixing rod is placed between the two fixing claws 9, and the two fixing claws 9 close to form the fixing hole 10, which is engaged with the fixing rod so that the fixing rod cannot be pulled out directly. Guide rods 8 that can slide in the guide groove 7 are provided on both sides of the fixing claws 9. When the control member 6 is pressed down towards the mounting base 3, the fixing claws 9 open, and the fixing rod can be taken out at this time.

[0040] Working principle:

[0041] When the operating handle 5 is rotated from top to bottom (power off), the pressing part on the operating handle 5 rotates and presses against the control member 6, causing the fixing claw 9 to open. At this time, the fixing rod can be removed. When the operating handle 5 is rotated from bottom to top (power on), the pressing part leaves the control member 6, and the control member 6 returns to its original position under the action of the return spring, causing the fixing claw 9 to close, preventing the front cover 2 from opening when the power is on.

[0042] Example 2:

[0043] This embodiment provides a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0044] The fixing components are symmetrically arranged on both sides of the mounting base 3.

[0045] Setting two front cover plates makes the front cover plate 2 more securely fixed.

[0046] Example 3:

[0047] This embodiment provides a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0048] It also includes a limiting slide rod 11, which is fixed on the mounting base 3. The control component 6 is provided with a socket that mates with the limiting slide rod 11. A return spring is sleeved on the limiting slide rod 11, and a limiting screw 12 is provided on the top of the limiting slide rod 11.

[0049] The limiting slide rod 11 is fixed on the mounting base 3. The control component 6 is provided with a socket that mates with the limiting slide rod 11. The control component 6 is slidably mounted on the limiting slide rod 11. A return spring is sleeved on the limiting slide rod 11. The top of the limiting slide rod 11 is provided with a limiting screw 12 for limiting. The limiting screw 12 prevents the control component 6 from coming off the limiting slide rod 11.

[0050] Example 4:

[0051] This embodiment provides a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0052] The pressing part includes:

[0053] Press the crossbar 14, and the end of the crossbar 14 is rotated and inserted into the control component 6;

[0054] The hinged link 13 is hinged at one end to the operating handle 5 and fixed at the other end to the pressing crossbar 14.

[0055] The end of the pressing crossbar 14 is rotatably inserted into the control component 6 and is offset from the guide groove 7. The pressing crossbar 14 can slide along the direction of the guide groove 7 within the control component 6. The pressing crossbar 14 is connected to the operating handle 5 through the hinged connecting rod 13. One end of the hinged connecting rod 13 is hinged to the operating handle 5, and the other end is fixed to the pressing crossbar 14. Connecting the pressing crossbar 14 to the control component 6 prevents the pressing part from failing to press the control component 6 and enhances the stability of the structural linkage.

[0056] Example 5:

[0057] This embodiment provides a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0058] At least three limit slides 11 are provided to cooperate with a control component 6.

[0059] The number of limit slide rods 11 is three or more, which can enhance the structural stability of the sliding control component 6.

[0060] Example 6:

[0061] This embodiment provides a molded case circuit breaker, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0062] The ends of the two fixing claws 9 are provided with opposing inclined surfaces. When the fixing rod abuts against the inclined surface, the fixing claws 9 can be opened by the abutting movement, allowing the fixing rod to enter the fixing hole 10.

[0063] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms fall within the scope of protection of this application.

Claims

1. A molded case circuit breaker characterized by, The utility model relates to a circuit breaker, which comprises: a housing (1) comprising a front cover plate (2) and a mounting base (3), and an operating handle (5) for opening and closing a circuit is arranged on the housing (1), and a pressing part is arranged on the operating handle (5); the front cover plate (2) and the mounting base (3) are fixed by a fixing assembly arranged on the mounting base (3); the fixing assembly comprises: a control member (6) vertically slidingly arranged on the mounting base (3) and provided with a reset spring between the control member (6) and the mounting base (3), and two guide grooves (7) are arranged on the control member (6); two fixing claws (9) with two ends in the same direction being hingedly connected to the mounting base (3) at the same time, the two fixing claws (9) cooperatively forming a fixing hole (10), a fixing rod cooperatively arranged with the fixing hole (10) being arranged on the front cover plate (2), and a guide rod (8) being further arranged on the fixing claw (9) and slidingly arranged in the guide groove (7); when the operating handle (5) is used to open the circuit, the pressing part presses the control member (6), so that the two fixing claws (9) are separated.

2. A molded case circuit breaker according to claim 1, wherein The fixing assembly is symmetrically arranged on both sides of the mounting base (3).

3. A molded case circuit breaker according to claim 1, wherein The utility model further comprises a limiting sliding rod (11) fixed on the mounting base (3), the control member (6) is provided with a bushing cooperatively arranged with the limiting sliding rod (11), the reset spring is sleeved on the limiting sliding rod (11), and a limiting screw (12) is arranged on the top of the limiting sliding rod (11).

4. The molded case circuit breaker of claim 1, wherein, The pressing part comprises: a pressing cross rod (14) with one end rotatably inserted into the control member (6); a hinged connecting rod (13) hingedly connected to the operating handle (5) at one end and fixed to the pressing cross rod (14) at the other end.

5. The molded case circuit breaker of claim 1, wherein, The limiting sliding rod (11) cooperatively arranged on one control member (6) is provided with at least three.

6. A molded case circuit breaker according to claim 1 wherein, Opposite inclined surfaces are arranged on the ends of the two fixing claws (9), when the fixing rod abuts against the inclined surfaces, the fixing claws (9) can be opened by abutting movement, so that the fixing rod enters the fixing hole (10).

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