Manual separating mechanism for circuit breaker

Abstract

The utility model discloses a manual separating mechanism for a circuit breaker, which comprises a shell, a push rod and a pushing mechanism, the push rod is arranged at the top of the shell in a sliding manner, and the lower end of the push rod is arranged in the shell in a penetrating manner; the pushing mechanism comprises a rotating shaft, a gear, a transmission block and a guide rod, the rotating shaft is rotationally arranged in the shell, the gear and the transmission block are both fixedly connected with the rotating shaft, the guide rod is slidably arranged in the shell, a rack section meshed with the gear is arranged on the guide rod in the length direction, and when the guide rod slides to drive the rotating shaft to rotate, the transmission block can push the push rod to ascend and descend; therefore, the push rod forms a first state in which the push rod abuts against a trip of the circuit breaker and a second state in which the push rod is separated from the trip of the circuit breaker. The problems that in the prior art, a sliding rail is matched with a triangular lead block to slide back and forth, matching between the triangular lead block and the sliding rail cannot completely meet the requirement that the triangular lead block and the sliding rail are kept on the same vertical plane, so that transverse stress exists between the sliding rail and the triangular lead block, and the triangular lead block is prone to being clamped and abraded when moving are solved.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a manual circuit breaker tripping mechanism. Background Technology

[0002] As a type of DC switchgear, the handcart-type split-type DC circuit breaker cabinet must have the function of manually disconnecting the circuit breaker in the event of a control system failure. For example, patent document CN202022901940.1 discloses a DC circuit breaker trolley, specifically disclosing an emergency disconnection device including a slide rail fixed on the frame, a guide block movably connected to and correspondingly arranged with the slide rail, and a tripping rod movably connected to the frame. The end of the tripping rod near the guide block abuts against the guide block. The movement of the guide block relative to the slide rail drives the tripping rod to move upward or downward. The frame is also provided with a drive component for driving the guide block to move along the slide rail. The upward movement of the tripping rod is used for emergency circuit breaking of the DC circuit breaker trolley. With the above solution, the main reliance is on the triangular guide block installed on the slide rail. The circuit breaker disconnection push rod is pushed up and down by the forward and backward sliding of the triangular guide block. Since the fit between the triangular guide block and the slide rail cannot be completely satisfied to keep them in the same vertical plane, there is lateral stress between the slide rail and the triangular guide block. The triangular guide block is prone to jamming and wear when it moves. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a manual circuit breaker mechanism. This solves the problem in the prior art where the sliding of the triangular lead block in conjunction with the slide rail results in the triangular lead block not being able to be kept in the same vertical plane, leading to lateral stress between the slide rail and the triangular lead block, and the triangular lead block being prone to jamming and wear during movement.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a manual tripping mechanism for a circuit breaker, including a housing, a push rod, and a pushing mechanism. The push rod is slidably mounted on the top of the housing, and its lower end passes through the housing. The pushing mechanism includes a rotating shaft, a gear, a transmission block, and a guide rod. The rotating shaft is rotatably mounted inside the housing, and the gear and transmission block are fixedly connected to the rotating shaft. The guide rod is slidably mounted inside the housing, and it has a rack segment along its length that meshes with the gear. When the guide rod is slidably driven to rotate the rotating shaft, the transmission block can push the push rod up and down, so that the push rod can form a first state of contact with the tripping of the circuit breaker and a second state of separation from the tripping of the circuit breaker.

[0006] In some embodiments, the transmission block has at least one protrusion for pushing the push rod up and down.

[0007] In some embodiments, the transmission block is quadrilateral, and the four sides of the transmission block are of the same length, each side is arc-shaped, and the protrusion is formed at the junction of two adjacent sides.

[0008] In some embodiments, a buffer pad is fixed to the upper end of the push rod.

[0009] In some embodiments, the buffer pad is a rubber pad or a ceramic pad.

[0010] In some embodiments, the pushing mechanism further includes a return element, which includes a mounting base, a spring, and a pressure block. The mounting base is fixed to one side of the housing, and one end of the guide rod passes through the mounting base. The pressure block is located in the mounting base and is fixedly connected to one end of the guide rod. The spring is located in the mounting base and sleeved on the guide rod. When the guide rod slides, the pressure block can compress the spring.

[0011] In some embodiments, a button is also fixed to one end of the guide rod.

[0012] In some embodiments, the top of the housing is further provided with a seat, and the push rod is slidably connected to the seat.

[0013] In some embodiments, the push rod is an iron push rod, a steel push rod, or an alloy push rod.

[0014] In some embodiments, the bottom of the housing has a plurality of movable rollers.

[0015] Compared with the prior art, the present invention provides a manual tripping mechanism for a circuit breaker. A push rod is slidably mounted on the top of the housing, with its lower end passing through the housing. A rotating shaft is rotatably mounted inside the housing. Gears and transmission blocks are fixedly connected to the rotating shaft. A guide rod is slidably mounted inside the housing, and the guide rod has a rack segment along its length that meshes with the gear. When the sliding guide rod drives the rotating shaft to rotate, the transmission block can push the push rod up and down, allowing the push rod to form a first state of contact with the circuit breaker tripping and a second state of separation from the circuit breaker tripping. There is no mutual constraint between the gear and the rack segment in the lateral direction. Even if there is an assembly deviation between the gear and the rack segment, it will not affect the movement of the mechanism and will not cause jamming. The longitudinal assembly deviation can also be reliably controlled to reduce the gap between the gear and the rack segment, making the sliding of the guide rod smoother. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of a manual circuit breaker tripping mechanism provided in an embodiment of this utility model;

[0017] Figure 2 This is a diagram showing the usage status of a manual circuit breaker tripping mechanism provided in an embodiment of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] To address the technical problem in existing technologies where the sliding of a triangular guide block via a slide rail results in incomplete alignment between the triangular guide block and the slide rail, leading to lateral stress between them and causing jamming and wear during movement, this invention provides a manual circuit breaker mechanism that reduces the sensitivity between moving parts, making operation more effortless.

[0020] Please see Figure 1 and Figure 2 , Figure 1 and Figure 2 According to one embodiment of the present invention, a manual tripping mechanism for a circuit breaker includes a housing 1 and a pushing mechanism 2. A push rod 3 is slidably disposed on the top of the housing 1, and the lower end of the push rod 3 passes through the housing 1. The pushing mechanism 2 includes a rotating shaft 21, a gear 22, a transmission block 23, and a guide rod 24. The rotating shaft 21 is rotatably disposed within the housing 1. The gear 22 and the transmission block 23 are both fixedly connected to the rotating shaft 21. The guide rod 24 is slidably disposed within the housing 1, and the guide rod 24 has a rack segment 241 along its length that meshes with the gear 22. When the guide rod 24 is slidably driven to rotate the rotating shaft 21, the transmission block 23 can push the push rod 3 up and down, so that the push rod 3 can form a first state of contact with the tripping of the circuit breaker and a second state of separation from the tripping of the circuit breaker.

[0021] It's important to note that a circuit breaker is an automatic electrical switch designed to protect circuits from damage caused by overloads or short circuits. It works by quickly cutting off current flow when it detects that the current exceeds a preset safe value, preventing potential fires or other electrical faults. Unlike traditional fuses, which melt in overcurrent situations and need to be replaced, circuit breakers can be manually reset and reused after the fault has been cleared.

[0022] In this specific embodiment, when the circuit breaker experiences an emergency and needs to stop working, the sliding guide rod 24 can quickly control the gear 22 and the transmission block 23 to rotate synchronously, so that the transmission block 23 can push the push rod 3 to rise. The push rod 3 can then abut against the tripping of the circuit breaker to achieve emergency circuit breaking, thereby eliminating the potential dangers and avoiding damage to equipment or injury to personnel, thus meeting the development needs of modern industry.

[0023] It should be noted that the transmission block 23 is not limited to a specific structure. As long as it can rotate synchronously with the gear and drive the push rod 3 to rise or fall, no other limitations are made here.

[0024] In this invention, a push rod is slidably mounted on the top of the housing, with its lower end passing through the housing. A rotating shaft is rotatably mounted within the housing. Gears and a transmission block are fixedly connected to the rotating shaft. A guide rod slides within the housing, and along its length, a rack segment meshes with the gear. When the sliding guide rod drives the rotating shaft to rotate, the transmission block pushes the push rod up and down, allowing the push rod to reach a first state of contact with the circuit breaker's tripping mechanism and a second state of separation from the circuit breaker's tripping mechanism. The gear and rack segment do not mutually constrain each other laterally, so even if there are assembly deviations between the gear and rack segment, the movement of the mechanism will not be affected.

[0025] It will not cause the mechanism to jam, and the longitudinal assembly deviation can be reliably controlled. The gap between the gear and rack section is reduced, and the sliding of the guide rod is smoother.

[0026] In one embodiment, the transmission block 23 has at least one protrusion 231, which is used to push the push rod 3 up and down; in this specific embodiment, the transmission block 23 is quadrilateral, and the four sides of the transmission block 23 are of the same length, each side is arc-shaped, and the protrusion 231 is formed at the junction of two adjacent sides.

[0027] It should be noted that when the transmission block 23 lifts the push rod 3, this state is unstable. When the guide rod 24 retracts and drives the gear 22 to rotate counterclockwise, the push rod 3 will also fall back down under the action of the circuit breaker tripping and resetting force and gravity.

[0028] It should be noted that a buffer pad 31 is fixedly provided at the upper end of the push rod 3. The buffer pad 31 is a rubber pad. Of course, in other embodiments, the buffer pad 31 can also be a ceramic pad.

[0029] Based on the above scheme, the pushing mechanism 2 further includes a return component 25, which includes a mounting base 251, a spring 252, and a pressure block 253. The mounting base 251 is fixed to one side of the housing 1, and one end of the guide rod 24 passes through the mounting base 251. The pressure block 253 is located in the mounting base 251 and is fixedly connected to one end of the guide rod 24. The spring 252 is located in the mounting base 251 and is sleeved on the guide rod 24. When the guide rod 24 slides, the pressure block 253 can squeeze the spring 252. In addition, a button 254 is fixedly provided at one end of the guide rod 24.

[0030] Specifically, when the transmission block 23 lifts the push rod 3, under the elastic action of the spring 252, the push rod 3 will fall back down under the action of the circuit breaker tripping and resetting force and gravity when the guide rod 24 retracts and drives the gear 22 to rotate counterclockwise.

[0031] Based on the above scheme, the top of the housing 1 is also provided with a seat 11, and the push rod 3 is slidably connected to the seat 11; wherein, in order to ensure that the push rod 3 can fall under the action of gravity, it is necessary to increase the mass of the push rod 3. Specifically, the push rod 3 is made of iron rod. Of course, in other embodiments, the push rod 3 can also be made of steel rod or alloy rod.

[0032] Based on the above scheme, the bottom of the housing 1 has multiple movable rollers 12, of which at least one movable roller 12 has a braking function; when the movable roller 12 is locked, it can prevent the housing 1 from sliding and ensure that the push rod 3 is always directly below the circuit breaker tripping.

[0033] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A manual circuit breaker tripping mechanism, characterized in that, The utility model relates to a circuit breaker push rod device, comprising: a housing; a push rod slidingly arranged on the top of the housing and having a lower end penetrating into the housing; and a pushing mechanism comprising a rotating shaft, a transmission block and a guide rod, the rotating shaft being rotatably arranged in the housing and having a gear and the transmission block fixedly arranged thereon, the guide rod being slidingly arranged in the housing and having a rack segment engaging with the gear along the length direction, the transmission block being capable of pushing the push rod to ascend and descend when the guide rod drives the rotating shaft to rotate, so that the push rod forms a first state of abutting against the trip of the circuit breaker and a second state of separating from the trip of the circuit breaker.

2. The handle mechanism for a circuit breaker of claim 1, wherein The transmission block has at least one protruding part for pushing the push rod to ascend and descend.

3. The handle mechanism for a circuit breaker of claim 2 wherein, The transmission block is quadrangular, the four sides of the transmission block have the same length, each of the sides is in the shape of a circular arc, and the protruding part is formed at the junction of two adjacent sides.

4. The handle mechanism for a circuit breaker of claim 1 wherein, The upper end of the push rod is fixedly provided with a buffer pad.

5. The handle mechanism for a circuit breaker of claim 4 wherein, The buffer pad is a rubber pad or a ceramic pad.

6. The handle mechanism for a circuit breaker of claim 1, wherein The pushing mechanism further comprises a restoring member, the restoring member comprising a mounting seat, a spring and a pressing block, the mounting seat being fixedly arranged on one side of the housing, one end of the guide rod penetrating into the mounting seat, the pressing block being arranged in the mounting seat and fixedly connected with one end of the guide rod, and the spring being arranged in the mounting seat and sleeved on the guide rod, the pressing block being capable of pressing the spring when the guide rod slides.

7. The handle mechanism for a circuit breaker of claim 6 wherein, One end of the guide rod is further fixedly provided with a button.

8. The handle mechanism for a circuit breaker of claim 1, wherein, The top of the housing is further provided with a seat body, and the push rod is slidingly connected with the seat body.

9. The handle mechanism for a circuit breaker of claim 1 wherein, The push rod is an iron push rod, a steel push rod or an alloy push rod.

10. The handle mechanism for a circuit breaker of claim 1, wherein, The bottom of the housing has a plurality of moving rollers.

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