Low-voltage distribution drawer circuit breaker quick plug structure

Abstract

This utility model relates to the field of circuit breaker insertion and removal structures, specifically to a quick-release structure for a low-voltage power distribution drawer-type circuit breaker, including a quick-release handle for driving the quick insertion and removal of the drawer-type circuit breaker. This utility model's quick-release structure for a low-voltage power distribution drawer-type circuit breaker, through the arrangement of a quick-release handle, a drawer-type circuit breaker, a transmission rod, a first spur gear, a limit seat, a toothed groove, a pressing block, a second spur gear, and a plug, allows the drawer-type circuit breaker to be pushed into the low-voltage distribution cabinet. First, pulling the pressing block disengages the internal limit seat and toothed groove from the first spur gear. Then, rotating the quick-release handle causes the transmission rod and the two sets of second spur gears at the front to mesh and rotate, driving the toothed blocks on both sides and the plug at the bottom to insert into the slots inside the low-voltage distribution cabinet, thus achieving quick insertion and removal of the drawer-type circuit breaker. Afterwards, releasing the pressing block pushes the limit seat through a first spring, causing the toothed groove at one end of the limit seat to lock the quick-release handle around the first spur gear, preventing accidental contact by other personnel.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker plug-in structure, specifically to a quick plug-in structure for a low-voltage power distribution drawer-type circuit breaker. Background Technology

[0002] The plug-in / pull-out structure of low-voltage distribution drawer-type circuit breakers is a key design feature in low-voltage power distribution systems. It allows the circuit breaker to be easily inserted into and removed from the switch cabinet like a drawer. This design is mainly used in applications where frequent operation, maintenance, or replacement of circuit breakers is required.

[0003] Traditional low-voltage distribution drawer-type circuit breakers with quick-plug structure rely on the physical connection between the circuit breaker and the drawer seat to achieve limiting when the drawer-type circuit breaker is pushed into the low-voltage distribution cabinet. However, they lack an active locking mechanism. Therefore, when subjected to external forces (such as accidental contact or vibration), the plug-in part may disengage due to gaps or elastic deformation, causing the circuit breaker to pop out unexpectedly or make poor contact, which may lead to power outages or arcing faults.

[0004] Therefore, it is necessary to invent a quick-plug structure for a low-voltage power distribution drawer-type circuit breaker to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a quick-plug structure for a low-voltage power distribution drawer-type circuit breaker. When the drawer-type circuit breaker is pushed into the low-voltage distribution cabinet, the pressing block is first pulled to disengage the internal limiting seat and the front toothed groove from the first spur gear outside the transmission rod. Then, the quick-release handle is rotated to engage the transmission rod and the two sets of second spur gears at the front, causing the toothed blocks on both sides and the lower insertion block to insert into the slot inside the low-voltage distribution cabinet, thus achieving quick plugging and unplugging of the drawer-type circuit breaker. Afterwards, releasing the pressing block pushes the limiting seat through the first spring. This design allows the toothed groove at one end of the limit seat to lock the quick-release handle outside the first spur gear, preventing accidental contact by other personnel. This addresses the issue raised in the background section regarding the traditional quick-release structure for low-voltage distribution drawer-type circuit breakers. In this structure, the circuit breaker relies on the physical connection between the circuit breaker and the drawer seat for limiting the movement when pushed into the low-voltage distribution cabinet. However, it lacks an active locking mechanism. Consequently, when subjected to external force, the connection may disengage due to gaps or elastic deformation, leading to accidental ejection or poor contact of the circuit breaker, which can cause power outages or arcing faults.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a quick-release structure for a low-voltage power distribution drawer-type circuit breaker, including a quick-release handle for driving the drawer-type circuit breaker to be quickly inserted and removed; A quick-release handle is located in front of the drawer circuit breaker. A transmission rod is fixedly connected to the rear side of the quick-release handle. A first spur gear is fixedly connected to the outside of the transmission rod. A second spur gear is fixedly connected to the front end of the transmission rod. A toothed block is meshed with the outside of the second spur gear. A plug is fixedly connected below the toothed block. The plug penetrates the bottom of the inner side of the drawer circuit breaker. The fixed blocks are all fixed inside the drawer circuit breaker. A connecting rod is fixedly connected to the outside of the fixed blocks. A movable block is slidably connected to the outside of the connecting rod. A first spring is sleeved on the outside of the connecting rod. A limit seat is fixedly connected to the outside of the movable block. The front end surface of the limit seat is provided with a toothed groove.

[0007] Preferably, the limiting seat is slidably connected to the connecting rod, and the first spring is located on the rear side of the movable block.

[0008] Preferably, the first spur gear is rotatably connected to the drawer circuit breaker, and the outer teeth of the first spur gear match the tooth groove at the front end of the limit seat.

[0009] Preferably, the second spur gear is provided in two sets, and the two sets of the second spur gear are meshed together.

[0010] Preferably, the drawer circuit breaker has a fixed bracket on both sides inside, the fixed bracket is located outside the two sets of second spur gears, and the gear block is slidably connected to the fixed bracket.

[0011] Preferably, the fixing frame has sliding grooves on both sides inside, and a slider is slidably connected inside the sliding groove. The two sides of the toothed block are fixedly connected to the slider, and a second spring is fixedly connected above the toothed block. The upper end of the second spring is fixedly connected to the inside of the fixing frame.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: This utility model, through the arrangement of a quick-release handle, a drawer circuit breaker, a transmission rod, a first spur gear, a limit seat, a toothed groove, a pressing block, a second spur gear, and a plug, not only enables quick insertion and removal but also locks the drawer circuit breaker to prevent accidental contact. When the drawer circuit breaker is pushed into the low-voltage distribution cabinet, the pressing block is first pulled to disengage the internal limit seat and the front toothed groove from the first spur gear outside the transmission rod. Then, the quick-release handle is rotated to engage the transmission rod and the two sets of second spur gears at the front, causing the toothed blocks on both sides and the plug below to insert into the slots inside the low-voltage distribution cabinet, thus enabling quick insertion and removal of the drawer circuit breaker. Afterward, the pressing block is released, and the first spring pushes the limit seat, causing the toothed groove at one end of the limit seat to lock the quick-release handle outside the first spur gear, preventing accidental contact by other personnel. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the drawer circuit breaker structure of this utility model; Figure 3 This is a schematic diagram of the limiting seat structure of this utility model; Figure 4 This is a schematic diagram of the insert structure of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Quick-release handle; 2. Drawer circuit breaker; 3. Transmission rod; 4. First spur gear; 5. Fixed block; 6. Connecting rod; 7. Movable block; 8. First spring; 9. Limit seat; 10. Gear groove; 11. Pressing block; 12. Second spur gear; 13. Fixed bracket; 14. Slide groove; 15. Sliding block; 16. Gear block; 17. Second spring; 18. Insert block. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1-4 The diagram shows a quick-release structure for a low-voltage power distribution drawer-type circuit breaker, including a quick-release handle 1 for driving the drawer-type circuit breaker to be quickly inserted and removed. A quick-release handle 1 is located in front of the drawer circuit breaker 2. A transmission rod 3 is fixedly connected to the rear side of the quick-release handle 1. A first spur gear 4 is fixedly connected to the outside of the transmission rod 3. A second spur gear 12 is fixedly connected to the front end of the transmission rod 3. A toothed block 16 is meshed with the outside of the second spur gear 12. An insert block 18 is fixedly connected below the toothed block 16. The insert block 18 passes through the bottom of the inner side of the drawer circuit breaker 2. The fixing blocks 5 are all fixed inside the drawer circuit breaker 2. The outer side of the fixing blocks 5 is fixedly connected to the connecting rod 6. The outer side of the connecting rod 6 is slidably connected to the movable block 7. The outer side of the connecting rod 6 is fitted with the first spring 8. The outer side of the movable block 7 is fixedly connected to the limit seat 9. The front end surface of the limit seat 9 is provided with a toothed groove 10. When the drawer circuit breaker 2 is pushed into the low-voltage distribution cabinet, the pressing block 11 is pulled first to drive the toothed groove 10 at the front end of the limit seat 9 to disengage from the first spur gear 4 outside the transmission rod 3. Then, the quick-release handle 1 is rotated to drive the transmission rod 3 and the two sets of second spur gears 12 in front to mesh and rotate, driving the toothed blocks 16 on both sides and the insertion block 18 below to insert into the slot in the low-voltage distribution cabinet, thereby realizing the quick insertion and removal of the drawer circuit breaker 2. After that, the pressing block 11 is released and the first spring 8 pushes the limit seat 9, so that the toothed groove 10 at one end of the limit seat 9 is fitted outside the first spur gear 4 to lock the quick-release handle 1, preventing other personnel from accidentally touching it.

[0018] like Figure 3 As shown, the limiting seat 9 is slidably connected to the connecting rod 6. The first spring 8 is located behind the movable block 7. By pulling the pressing block 11, the limiting seat 9 and the movable blocks 7 on the upper and lower sides slide outside the connecting rod 6. The first spring 8 outside the connecting rod 6 is squeezed by the movable block 7. When the pressing block 11 is released, the first spring 8 rebounds and pushes the limiting seat 9 to be fitted outside the first straight gear 4 to lock it.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, the first spur gear 4 is rotatably connected to the drawer circuit breaker 2. The external teeth of the first spur gear 4 match the tooth groove 10 at the front end of the limit seat 9. When the tooth groove 10 at the front end of the limit seat 9 is fitted onto the external teeth of the first spur gear 4, the first spur gear 4 and the quick-release handle 1 can be locked to prevent other personnel from accidentally touching it.

[0020] like Figure 2 As shown, there are two sets of second spur gears 12, which are meshed together. When the quick-release handle 1 and the transmission rod 3 are rotated, the transmission rod 3 drives one set of second spur gears 12 at the front end to rotate. When one set of second spur gears 12 rotates, it drives the other set of second spur gears 12 to mesh and drive. This simultaneously drives the two sets of tooth blocks 16 and plug blocks 18 to extend and retract from the drawer circuit breaker 2, thereby enabling quick insertion and removal of the entire drawer circuit breaker 2 in the low-voltage distribution cabinet.

[0021] like Figure 4 As shown, the drawer circuit breaker 2 has fixed brackets 13 on both sides inside. The fixed brackets 13 are located outside the two sets of second spur gears 12. The tooth block 16 is slidably connected to the fixed brackets 13. The fixed brackets 13 serve as a telescopic support for the tooth block 16, thereby enhancing the stability of the tooth block 16 during its telescopic movement.

[0022] like Figure 4 As shown, the inside of the fixed frame 13 has grooves 14 on both sides, and sliders 15 are slidably connected inside the grooves 14. The two sides of the toothed block 16 are fixedly connected to the sliders 15. The upper part of the toothed block 16 is fixedly connected to the top of the toothed block 16. The upper end of the second spring 17 is fixedly connected to the inside of the fixed frame 13. When the toothed block 16 is meshed and driven by the second spur gear 12, the sliders 15 on both sides of the toothed block 16 slide in the grooves 14 inside the fixed frame 13, which limits the sliding and enhances the stability. At the same time, the second spring 17 above the toothed block 16 rebounds and stretches, which enhances the stability of the insert block 18.

[0023] The working principle of this utility model is as follows: When the drawer circuit breaker 2 needs to be pulled out from the low-voltage distribution cabinet, the circuit breaker is first tripped to isolate the power supply. Then, dragging the pressing block 11 causes the toothed groove 10 at the front end of the limit seat 9 to disengage from the first spur gear 4. After that, rotating the quick-release handle 1 causes the transmission rod 3 to rotate with a set of second spur gears 12 at the front end. The rotation of one set of second spur gears 12 drives another set of second spur gears 12 to mesh and transmit power. The meshing of the two sets of second spur gears 12 pushes the toothed block 16 inside the fixing frame 13 and the lower insertion block 18 to move up and down, so that the insertion block 18 disengages from the slot in the low-voltage distribution cabinet. At this time, the pressing block 11 is released. 1. The limiting seat 9 uses the first spring 8 outside the connecting rod 6 to push the tooth groove 10 at the front end of the limiting seat 9 to lock the first spur gear 4, locking the entire quick-release handle 1 and the second spur gear 12. Then, the entire drawer circuit breaker 2 can be pulled out of the low-voltage distribution cabinet. When it is necessary to push the entire drawer circuit breaker 2 into the low-voltage distribution cabinet, simply repeat the above steps. After pushing it in, the limiting seat 9 will also lock the first spur gear 4 and the quick-release handle 1 to prevent other personnel from touching it and causing it to rotate. In this way, the use process of the quick-release structure of the low-voltage distribution drawer circuit breaker is completed.

[0024] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A quick-plug structure for a low-voltage power distribution drawer-type circuit breaker, characterized in that: Includes a quick-release handle (1) for driving the drawer-type circuit breaker to be quickly plugged in and out; A quick-release handle (1) is located in front of the drawer circuit breaker (2). A transmission rod (3) is fixedly connected to the rear side of the quick-release handle (1). A first spur gear (4) is fixedly connected to the outside of the transmission rod (3). A second spur gear (12) is fixedly connected to the front end of the transmission rod (3). A tooth block (16) is meshed with the outside of the second spur gear (12). An insert block (18) is fixedly connected below the tooth block (16). The insert block (18) penetrates the bottom of the inner side of the drawer circuit breaker (2). The fixed blocks (5) are all fixed inside the drawer circuit breaker (2). The outer side of the fixed blocks (5) is fixedly connected to the connecting rod (6). The outer side of the connecting rod (6) is slidably connected to the movable block (7). The outer side of the connecting rod (6) is fitted with a first spring (8). The outer side of the movable block (7) is fixedly connected to a limiting seat (9). The front end surface of the limiting seat (9) is provided with a toothed groove (10).

2. The quick-plug structure for a low-voltage power distribution drawer-type circuit breaker according to claim 1, characterized in that: The limiting seat (9) is slidably connected to the connecting rod (6), and the first spring (8) is located behind the movable block (7).

3. The quick-plug structure for a low-voltage power distribution drawer-type circuit breaker according to claim 1, characterized in that: The first spur gear (4) is rotatably connected to the drawer circuit breaker (2), and the external teeth of the first spur gear (4) match the tooth groove (10) at the front end of the limit seat (9).

4. The quick-plug structure for a low-voltage power distribution drawer-type circuit breaker according to claim 1, characterized in that: The second spur gear (12) is provided in two sets, and the two sets of the second spur gear (12) are meshed and connected.

5. The quick-plug structure for a low-voltage power distribution drawer-type circuit breaker according to claim 1, characterized in that: The drawer circuit breaker (2) has a fixed bracket (13) fixedly connected to both sides inside. The fixed bracket (13) is located outside the two sets of second spur gears (12). The tooth block (16) is slidably connected to the fixed bracket (13).

6. The quick-plug structure for a low-voltage power distribution drawer-type circuit breaker according to claim 5, characterized in that: The fixed frame (13) has sliding grooves (14) on both sides inside. A slider (15) is slidably connected inside the sliding groove (14). The toothed block (16) is fixedly connected to the slider (15) on both sides. A second spring (17) is fixedly connected above the toothed block (16). The upper end of the second spring (17) is fixedly connected to the inside of the fixed frame (13).

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