Mechanical thermomagnetic adjustable molded case circuit breaker

Abstract

This utility model discloses a mechanically thermomagnetically adjustable molded case circuit breaker. The key technical features are: a molded case circuit breaker body with an internal support frame; a housing on one side of the body; and a latch and switch on one side of the support frame. By pushing the latches on both sides of the circuit breaker body upwards, a second connecting rod moves upwards within the connection port. At this time, the support plate inside the circuit breaker body pushes up a sliding plate via the movement of the first connecting rod. This causes the first and second fixed posts on the sliding plate to bend against the thermal trip piece. When the thermal trip piece bends, it approaches the latch inside the circuit breaker body. Therefore, by adjusting the bending of the thermal trip piece, the impact time of the thermal trip piece on the latch within the circuit breaker body can be accelerated, preventing prolonged tripping time and damage to adjacent components.

Description

Technical Field

[0001] This utility model relates to the technical field of molded case circuit breakers, specifically to a mechanically thermomagnetically adjustable molded case circuit breaker. Background Technology

[0002] Molded case circuit breakers (MCCBs) automatically disconnect current when the current exceeds the trip setting. "Molded case" refers to the use of a plastic insulator as the outer casing to isolate conductors from grounded metal parts. MCCBs typically contain a thermomagnetic trip unit, while larger MCCBs may be equipped with a solid-state trip sensor. Their trip units are divided into thermomagnetic trip and electronic trip units.

[0003] Circuit breakers achieve power outage protection by tripping via thermomagnetism. Existing circuit breakers require a metal strip to bend when the power is abnormal, which may result in a slow bending time of the metal strip and a long tripping time, causing the current to exceed the safety threshold for an extended period and damaging adjacent components. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a mechanically thermomagnetically adjustable molded case circuit breaker. This solves the problem that existing circuit breakers require a metal strip to bend under heat to trip and disconnect the circuit when there is an abnormal power supply. This can result in a slow bending time of the metal strip and a long tripping time, causing the current to exceed the safety threshold for an extended period and damaging adjacent components.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A mechanically, thermo-magnetically, adjustable molded case circuit breaker includes: a molded case circuit breaker body, with a support inside the body, a housing on one side of the body, and a latch and switch on one side of the support; and an adjustment assembly disposed inside the body for adjusting the mechanical, thermo-magnetic properties within the body, the adjustment assembly including: a sliding port on one side of the support, with a sliding plate movably fitted inside the port, and the interior sides of the body respectively... A connecting frame is fixedly installed. Connection ports are respectively opened on both sides of the interior of the molded case circuit breaker body. Two support plates are provided on the bottom surface of the sliding plate. A first connecting rod is fixedly installed on one side of the support plate. A second connecting rod is fixedly installed at one end of the first connecting rod. The second connecting rod is movably connected to the connection port. A push block is fixedly installed at one end of the second connecting rod. Several first fixing posts are fixedly installed on the top surface of the sliding plate. A second fixing post is fixedly installed on the top surface of the first fixing posts. Several thermal trip pieces are provided inside the molded case circuit breaker body.

[0007] To improve the flexibility of adjustment, in a preferred embodiment of the mechanical thermomagnetic adjustable molded case circuit breaker of this utility model, two limiting frames are fixedly installed on both sides of the circuit breaker body, and several magnets are fixedly sleeved inside the limiting frames. Iron blocks are fixedly installed on both sides of the push block, and the iron blocks are connected to the magnets by magnetic force.

[0008] In order to support and push the sliding plate upward, as a mechanical thermomagnetic adjustable molded case circuit breaker of this utility model, preferably, a support block is fixedly installed on the top surface of the support plate, and the support block is movably sleeved with the sliding plate.

[0009] To prevent the sliding plate from shifting during movement, in this mechanical thermomagnetic adjustable molded case circuit breaker, preferably, a limiting post is fixedly installed inside the connecting frame, and two connecting holes are opened on the top surface of the sliding plate, the connecting holes being movably connected to the limiting post.

[0010] To improve the accuracy of bending the thermal trip piece, as a mechanical thermomagnetic adjustable molded case circuit breaker of this utility model, preferably, the bottom surface of the thermal trip piece is provided with a connecting pipe, and the connecting pipe is movably sleeved with the second fixed post.

[0011] In order to increase the friction on the surface of the push block, as a mechanical thermomagnetic adjustable molded case circuit breaker of this utility model, preferably, a number of grooves are provided on one side of the push block.

[0012] To prevent the second connecting rod from wobbling left and right inside the connection port, as a mechanical thermomagnetic adjustable molded case circuit breaker of this utility model, preferably, the outer circular wall surface of the second connecting rod is in contact with the interior of the connection port.

[0013] In summary, the present invention has the following main advantages:

[0014] By setting push blocks, the push blocks on both sides of the molded case circuit breaker body are pushed upward, causing the second connecting rod to move upward inside the connection port. At this time, the support plate inside the molded case circuit breaker body pushes the sliding plate upward through the movement of the first connecting rod, causing the first and second fixed posts on the sliding plate to bend against the thermal trip piece. When the thermal trip piece bends, it will approach the trip rod inside the molded case circuit breaker body. Thus, by adjusting the bending of the thermal trip piece, the time for the thermal trip piece on the mechanical, thermomagnetic and mechanical sides of the molded case circuit breaker body to impact the trip rod can be accelerated, avoiding prolonged tripping time and damage to adjacent components. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2This is a schematic diagram of the limiting frame structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the buckle structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the sliding plate structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the connecting frame structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the pusher block structure of this utility model.

[0021] Reference numerals in the attached drawings: 1. Molded case circuit breaker body; 2. Housing; 3. Bracket; 4. Trigger rod; 5. Switch; 6. Sliding port; 7. Sliding plate; 8. Connection hole; 9. Connection frame; 10. Limiting post; 11. Support block; 12. Support plate; 13. First connecting rod; 14. Second connecting rod; 15. Push block; 16. Groove; 17. Limiting frame; 18. Magnet; 19. Iron block; 20. Connection port; 21. First fixing post; 22. Second fixing post; 23. Connecting pipe; 24. Thermal trip piece. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6A mechanically, thermo-magnetically, adjustable molded case circuit breaker includes a molded case circuit breaker body 1. A support 3 is disposed inside the molded case circuit breaker body 1. A housing 2 is disposed on one side of the molded case circuit breaker body 1. A latch 4 and a switch 5 are disposed on one side of the support 3. An adjustment assembly is disposed inside the molded case circuit breaker body 1 for adjusting the mechanical, thermo-magnetic properties inside the molded case circuit breaker body 1. The adjustment assembly includes a sliding port 6, which is located on one side of the support 3. A sliding plate 7 is movably fitted inside the sliding port 6. Connecting frames 9 are fixedly installed on both sides of the interior of the molded case circuit breaker body 1. Connecting ports 20 are respectively opened on both sides of the interior of the molded case circuit breaker body 1. Two support plates 12 are disposed on the bottom surface of the sliding plate 7. A first connecting rod 13 is fixedly installed on one side of the support plate 12. A second connecting rod 14 is fixedly installed at one end of the first connecting rod 13. The second connecting rod 14 is movably fitted into the connecting port 20. A push block 15 is fixedly installed. Several first fixed posts 21 are fixedly installed on the top surface of the sliding plate 7. Second fixed posts 22 are fixedly installed on the top surface of the first fixed posts 21. Several thermal trip pieces 24 are provided inside the molded case circuit breaker body 1. By setting the push block 15, during use, the push blocks 15 on both sides of the molded case circuit breaker body 1 can be pushed upward to move the second connecting rod 14 upward inside the connection port 20. At this time, the support plate 12 inside the molded case circuit breaker body 1 will push the sliding plate 7 upward through the movement of the first connecting rod 13. This causes the first fixed posts 21 and the second fixed posts 22 on the sliding plate 7 to bend against the thermal trip pieces 24. When the thermal trip pieces 24 bend, they will approach the latch rod 4 inside the molded case circuit breaker body 1. Thus, by adjusting the bending of the thermal trip pieces 24, the time for the thermal trip pieces 24 to impact the latch rod 4 inside the molded case circuit breaker body 1 can be accelerated, avoiding prolonged tripping time and damage to adjacent components.

[0025] Example 2

[0026] Based on the above embodiment 1, refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6Two limiting frames 17 are fixedly installed on both sides of the molded case circuit breaker body 1. Several magnets 18 are fixedly sleeved inside the limiting frames 17. Iron blocks 19 are fixedly installed on both sides of the push block 15. The iron blocks 19 are connected to the magnets 18 by magnetic force. By setting the magnets 18, when the push block 15 is moved upward, the iron blocks 19 on the push block 15 can be connected to the magnets 18 in the limiting frames 17 by magnetic force. The limiting frames 17 are equipped with multiple magnets 18. The push block 15 can be moved up or down as needed, thereby adjusting the bending degree of the thermal trip piece 24 in the molded case circuit breaker body 1, improving the flexibility of adjustment. A support block 11 is fixedly installed on the top surface of the support plate 12. The support block 11 is movably sleeved with the sliding plate 7. By setting the support block 11, the support block 11 can be locked at the bottom of the sliding plate 7, thereby supporting the sliding plate 7 and pushing it upward. A limiting post 10 is fixedly installed inside the connecting frame 9. Two connecting holes 8 are opened on the top surface of the sliding plate 7. The connecting holes 8 are movably connected to the limiting post 10. By setting the limiting post 10, the limiting post 10 can restrict the sliding plate 7 from moving upward or downward through the connecting holes 8, so as to prevent the sliding plate 7 from deviating when moving. A connecting tube 23 is provided on the bottom surface of the thermal release piece 24. The connecting tube 23 is movably connected to the second fixed post 22. By setting the connecting tube 23, the second fixed post 22 will abut into the interior of the connecting tube 23 after moving upward, thereby improving the accuracy of bending the thermal release piece 24. Several grooves 16 are opened on one side of the push block 15. By setting the grooves 16, the grooves 16 can increase the friction of the surface of the push block 15. The outer circular wall of the second connecting rod 14 contacts the interior of the connecting port 20, so as to prevent the second connecting rod 14 from wobbling left and right in the connecting port 20.

[0027] Working principle: Please refer to Figures 1-6 As shown, by setting push blocks 15, during use, the push blocks 15 on both sides of the molded case circuit breaker body 1 can be pushed upward. When the push blocks 15 are moved upward, the iron block 19 on the push block 15 can be magnetically connected to the magnet 18 in the limiting frame 17. The limiting frame 17 is provided with multiple magnets 18. The push blocks 15 can be moved upward or downward as needed. After pushing the push blocks 15, the second connecting rod 14 moves upward inside the connection port 20. At this time, the support plate 12 inside the molded case circuit breaker body 1 pushes the sliding plate 7 upward through the movement of the first connecting rod 13, so that the first fixed post 21 and the second fixed post 22 on the sliding plate 7 bend against the thermal trip piece 24. When the thermal trip piece 24 bends, it will approach the trip rod 4 inside the molded case circuit breaker body 1. Thus, by adjusting the bending of the thermal trip piece 24, the time for the thermal trip piece 24 to impact the trip rod 4 inside the molded case circuit breaker body 1 can be accelerated, avoiding the tripping time being too long and causing damage to adjacent components.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanically, thermo-magnetically, adjustable molded case circuit breaker, characterized in that, include: The molded case circuit breaker body (1) has a bracket (3) inside, a shell (2) on one side of the molded case circuit breaker body (1), and a latch (4) and a switch (5) on one side of the bracket (3). An adjustment assembly is disposed inside the molded case circuit breaker body (1) for adjusting the mechanical, thermo-magnetic properties inside the molded case circuit breaker body (1). The adjustment assembly includes: a sliding port (6) which is opened on one side of the bracket (3), and a sliding plate (7) which is movably sleeved inside the sliding port (6). Connecting frames (9) are fixedly installed on both sides of the interior of the molded case circuit breaker body (1). Connecting ports (20) are opened on both sides of the interior of the molded case circuit breaker body (1). Two support plates are provided on the bottom surface of the sliding plate (7). 12) A first connecting rod (13) is fixedly installed on one side of the support plate (12), and a second connecting rod (14) is fixedly installed at one end of the first connecting rod (13). The second connecting rod (14) is movably connected to the connection port (20). A push block (15) is fixedly installed at one end of the second connecting rod (14). A plurality of first fixing posts (21) are fixedly installed on the top surface of the sliding plate (7). A second fixing post (22) is fixedly installed on the top surface of the first fixing post (21). A plurality of thermal trip pieces (24) are provided inside the body (1) of the molded case circuit breaker.

2. The mechanically thermomagnetically adjustable molded case circuit breaker according to claim 1, characterized in that: Two limiting frames (17) are fixedly installed on both sides of the molded case circuit breaker body (1). Several magnets (18) are fixedly sleeved inside the limiting frames (17). Iron blocks (19) are fixedly installed on both sides of the push block (15). The iron blocks (19) are connected to the magnets (18) by magnetic force.

3. The mechanically thermomagnetically adjustable molded case circuit breaker according to claim 1, characterized in that: A support block (11) is fixedly installed on the top surface of the support plate (12), and the support block (11) is movably connected to the sliding plate (7).

4. A mechanically thermomagnetically adjustable molded case circuit breaker according to claim 1, characterized in that: A limiting post (10) is fixedly installed inside the connecting frame (9), and two connecting holes (8) are opened on the top surface of the sliding plate (7), and the connecting holes (8) are movably connected to the limiting post (10).

5. A mechanically thermomagnetically adjustable molded case circuit breaker according to claim 1, characterized in that: The bottom surface of the thermal release tab (24) is provided with a connecting tube (23), which is movably connected to the second fixing post (22).

6. A mechanically thermomagnetically adjustable molded case circuit breaker according to claim 1, characterized in that: The pusher (15) has several grooves (16) on one side.

7. A mechanically thermomagnetically adjustable molded case circuit breaker according to claim 1, characterized in that: The outer circular wall surface of the second connecting rod (14) is in contact with the interior of the connecting port (20).

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