A molded case circuit breaker

Abstract

The utility model provides a molded case circuit breaker, which relates to the technical field of molded case circuit breakers, and includes two shells, the inner surface walls of the two shells are both provided with circuit breaker bodies, and the outer surface walls of the two shells are both provided with a group of threaded holes 1. In the utility model, the shell and the protective shell are connected by rotating screw 1 into threaded hole 1 and threaded hole 2 at the same time, thereby ensuring a tight connection between the shell and the protective shell, which is not easy to loosen. This stable connection ensures that the gap between the components will not become larger or the connection will fail due to external shock or vibration during operation of the circuit breaker, thereby improving the stability and reliability of the entire electrical system. Secondly, the shell and the distribution box are connected by inserting screw 2 into threaded hole 3, and the staff can appropriately adjust the tightness of the screw according to actual needs to achieve the best connection effect.

Description

Technical Field

[0001] The utility model relates to the technical field of molded case circuit breakers, in particular to a molded case circuit breaker. Background Art

[0002] A molded case circuit breaker is a device that can automatically cut off the current when the current exceeds the trip setting. It uses a plastic insulator as the outer shell of the device to isolate the conductors and the grounded metal parts. Molded case circuit breakers usually contain thermal magnetic trip units, while large-sized molded case circuit breakers are equipped with solid-state trip sensors.

[0003] Existing molded case circuit breakers can quickly cut off the circuit when in use, thereby preventing damage to electrical equipment or causing dangerous situations such as fire. In some cases, multiple molded case circuit breakers need to be used together. However, since molded case circuit breakers are not convenient to connect and split, the installation efficiency is slow. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that when the above-mentioned device is in use, the connection and separation between the molded case circuit breakers are not convenient enough when multiple molded case circuit breakers are needed because of the existing molded case circuit breakers.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a molded case circuit breaker, comprising two shells, the inner surfaces of the two shells are both provided with a circuit breaker body, the outer surfaces of the two shells are both provided with a group of threaded holes, the outer surfaces of the two shells are both provided with a protective shell, the outer surfaces of the two shells are both provided with a push block, the outer surfaces of the two protective shells are both provided with a group of threaded holes, the inner surfaces of the two groups of threaded holes are both threadedly connected with a screw, and the outer surfaces of the two shells are both fixedly installed with a connecting plate.

[0006] Preferably, the outer walls of the two connecting plates 1 are each provided with a threaded hole 3, the inner walls of the two threaded holes 3 are threadedly connected with screws 2, and a group of connecting blocks are fixedly installed on the top of the two shells.

[0007] Preferably, the inner surface walls of the two groups of connecting blocks are threadedly connected with screws three, and the tops of the two shells are fixedly installed with two fixing blocks.

[0008] Preferably, the outer walls of the four fixing blocks are each provided with a threaded hole four, and the inner walls of the four threaded holes four are each threadedly connected with a screw four.

[0009] Preferably, outer walls of the four screws are all threadedly connected with nuts, and two fixing rods are fixedly installed on the outer wall of one of the two shells.

[0010] Preferably, the outer walls of the two fixing rods are movably sleeved with a connecting plate 2, and the outer walls of the two connecting plates 2 are provided with holes.

[0011] Preferably, the outer wall of one of the two shells is provided with two threaded holes five, and the inner walls of the two threaded holes five are both threadedly connected with screws five.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the housing and the protective shell are connected by rotating the screw 1 into the threaded hole 1 and the threaded hole 2 at the same time, thereby ensuring a tight connection between the housing and the protective shell and preventing them from loosening. Such a stable connection ensures that the gap between components will not become larger or the connection will not fail due to external shock or vibration during operation of the circuit breaker, thereby improving the stability and reliability of the entire electrical system. Secondly, the housing and the distribution box are connected by inserting the screw 2 into the threaded hole 3. The staff can appropriately adjust the tightness of the screws according to actual needs to achieve the best connection effect.

[0014] 2. In the utility model, by rotating the screw four into the threaded hole four and then fixing the screw four with a nut, the two shells are fitted and fixed together, which can ensure that the connection between the two circuit breakers is stable and reliable, and can effectively prevent the circuit breaker from loosening or falling off due to vibration or other external factors during operation, thereby ensuring the stable operation of the entire circuit system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A main structural stereogram of a molded case circuit breaker is proposed for the utility model;

[0016] Figure 2 The utility model provides a three-dimensional split diagram of the main structure of a molded case circuit breaker;

[0017] Figure 3 A schematic diagram of the main structure splitting of a molded case circuit breaker is proposed for the utility model;

[0018] Figure 4 The utility model provides a three-dimensional exploded diagram of the main structure of a molded case circuit breaker.

[0019] Legend:

[0020] 1. Shell; 2. Circuit breaker body; 3. Threaded hole 1; 4. Protective shell; 5. Push block; 6. Threaded hole 2; 7. Screw 1; 8. Connecting plate 1; 9. Threaded hole 3; 10. Screw 2; 11. Connecting block; 12. Screw 3; 13. Fixing block; 14. Threaded hole 4; 15. Screw 4; 16. Nut; 17. Fixing rod; 18. Connecting plate 2; 19. Hole; 20. Threaded hole 5; 21. Screw 5. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment 1, as Figure 1-Figure 4 As shown, the utility model provides a molded case circuit breaker, comprising two shells 1, the inner walls of the two shells 1 are both provided with a circuit breaker body 2, the outer walls of the two shells 1 are both provided with a group of threaded holes 3, the outer walls of the two shells 1 are both provided with a protective shell 4, the outer walls of the two shells 1 are both provided with a push block 5, the outer walls of the two protective shells 4 are both provided with a group of threaded holes 6, the inner walls of the two groups of threaded holes 6 are both threadedly connected with screws 7, the outer walls of the two shells 1 are both fixedly installed with a connecting plate 8, the outer walls of the two connecting plates 8 are both provided with threaded holes 3 9, the inner walls of the two threaded holes 3 9 are both threadedly connected with screws 2 10, and the tops of the two shells 1 are both fixedly installed with a group of connecting blocks 11.

[0024] The effect achieved by the entire embodiment 1 is that, firstly, a group of threaded holes 1 3 and a group of threaded holes 2 6 are aligned with each other, and the shell 1 is connected to the protective shell 4 by rotating a group of screws 1 7 into the threaded holes 1 3 and the threaded holes 2 6. The staff can easily complete the assembly or disassembly of the shell 1 and the protective shell 4 by tightening or loosening the screws, which greatly saves installation time and improves work efficiency. The protective shell 4 can be easily opened by removing the screws to check and replace the components inside the circuit breaker without disassembling the entire circuit breaker. Secondly, the shell 1 is connected and fixed to the distribution box by rotating the screws 2 10 into the threaded holes 3 9.

[0025] Embodiment 2, as Figure 2-Figure 4As shown, the inner walls of the two groups of connecting blocks 11 are threadedly connected with screws three 12, the tops of the two shells 1 are fixedly installed with two fixing blocks 13, the outer walls of the four fixing blocks 13 are provided with threaded holes four 14, the inner walls of the four threaded holes four 14 are threadedly connected with screws four 15, the outer walls of the four screws four 15 are threadedly connected with nuts 16, the outer wall of one of the two shells 1 is fixedly installed with two fixing rods 17, the outer walls of the two fixing rods 17 are movably provided with connecting plates two 18, the outer walls of the two connecting plates two 18 are provided with holes 19, the outer wall of one of the two shells 1 is provided with two threaded holes five 20, and the inner walls of the two threaded holes five 20 are threadedly connected with screws five 21.

[0026] The effect achieved by the entire embodiment 2 is that, when the device is used normally, the two shells 1 are fixed together by rotating the screw four 15 into the threaded hole four 14 and using the nut 16 to rotate on the screw four 15. Secondly, the two connecting plates 2 18 can be rotated on the outer wall of the two fixing rods 17. The connecting plates 2 18 are rotated to align the hole 19 with the threaded hole five 20, and then the screw five 21 is simultaneously rotated into the hole 19 and the threaded hole five 20 to fix the two shells 1. This can ensure that the contact area between the two circuit breakers is sufficient and uniform, so that the current can pass smoothly, reducing the risk of electrical failure caused by poor contact.

[0027] Among them, the circuit breaker body 2 is a prior art, and its components and operating principles are public technologies, which will not be explained in detail here.

[0028] Working principle: first, when the device is in normal use, the outer walls of the two shells 1 are each provided with a group of threaded holes 3, and the outer walls of the two shells 1 are each provided with a protective shell 4. The outer walls of the two protective shells 4 are each provided with a group of threaded holes 6, and a group of threaded holes 3 and a group of threaded holes 6 are aligned with each other. Secondly, by rotating a group of screws 7 into the threaded holes 3 and the threaded holes 6, the shell 1 and the protective shell 4 are connected. The shell 1 and the protective shell 4 can be easily connected or separated without the use of complex tools or equipment, which improves work efficiency. At the same time, a good sealing effect can be formed at the connection to prevent external factors such as dust and moisture from entering the circuit breaker and protect the internal electrical components from damage. Secondly, the outer walls of the two shells 1 are fixedly installed with connecting plates 8, and the outer walls of the two connecting plates 8 are each provided with threaded holes 3 9. Then, by rotating screws 2 10 into the threaded holes 3 9, the shell 1 and the distribution box are connected and fixed. At the same time, the tops of the two shells 1 are fixedly installed A group of connecting blocks 11 are installed, and the inner walls of the two groups of connecting blocks 11 are threadedly connected with screws three 12, which strengthen the connection between the shell 1 and the distribution box. Secondly, two fixing blocks 13 are fixedly installed on the top of the two shells 1, and the outer walls of the four fixing blocks 13 are provided with threaded holes four 14. Four screws four 15 are rotated into the threaded holes four 14, and then the nuts 16 are rotated on the outer walls of the screws four 15 to make the two shells 1 fit and connect. It has strong versatility and can be applied to molded case circuit breakers of different models and specifications. It can ensure that the connection between the two circuit breakers is firm and reliable. The tightening effect of the screws can effectively prevent the circuit breaker from loosening or falling off due to vibration or other external factors during operation, thereby ensuring the stable operation of the entire circuit system. At the same time, the two connecting plates two 18 are rotated to align the hole 19 with the threaded hole five 20, and then the screw five 21 is rotated into the hole 19 and the threaded hole five 20 at the same time to strengthen the connection between the two shells 1.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A molded case circuit breaker, characterized in that: The invention comprises two shells (1), the inner walls of the two shells (1) are provided with a circuit breaker body (2), the outer walls of the two shells (1) are provided with a group of threaded holes (3), the outer walls of the two shells (1) are provided with a protective shell (4), the outer walls of the two shells (1) are provided with a push block (5), the outer walls of the two protective shells (4) are provided with a group of threaded holes (6), the inner walls of the two groups of threaded holes (6) are threadedly connected with screws (7), and the outer walls of the two shells (1) are fixedly installed with a connecting plate (8).

2. A molded case circuit breaker according to claim 1, characterized in that: The outer walls of the two connecting plates (8) are each provided with a threaded hole (9), the inner walls of the two threaded holes (9) are each threadedly connected with a screw (10), and a group of connecting blocks (11) are fixedly mounted on the tops of the two shells (1).

3. A molded case circuit breaker according to claim 2, characterized in that: The inner surface walls of the two groups of connection blocks (11) are both threadedly connected with screws three (12), and the tops of the two shells (1) are both fixedly mounted with two fixing blocks (13).

4. A molded case circuit breaker according to claim 3, characterized in that: The outer walls of the four fixing blocks (13) are each provided with a threaded hole four (14), and the inner walls of the four threaded holes four (14) are each threadedly connected with a screw four (15).

5. A molded case circuit breaker according to claim 4, characterized in that: The outer walls of the four screws (15) are all threadedly connected with nuts (16), and the outer wall of one of the two housings (1) is fixedly mounted with two fixing rods (17).

6. A molded case circuit breaker according to claim 5, characterized in that: The outer walls of the two fixing rods (17) are both movably sleeved with a second connecting plate (18), and the outer walls of the two second connecting plates (18) are both provided with holes (19).

7. A molded case circuit breaker according to claim 6, characterized in that: The outer wall of one of the two shells (1) is provided with two threaded holes (5) and the inner walls of the two threaded holes (20) are both threadedly connected with screws (5) (21).

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