Plugging power assisting device of circuit breaker

Abstract

A plugging power assisting device of a circuit breaker comprises two lever structures which are oppositely arranged, the two lever structures are provided with a connecting part used for being connected with the circuit breaker and a supporting part used for being connected with a supporting structure, and the two lever structures rotate around the supporting part so that the connecting part of the two lever structures can drive the circuit breaker to move. The circuit breaker further comprises a telescopic mechanism which is connected between the two lever structures and used for adjusting the distance between the two lever structures, the distance between the two lever structures can be adjusted according to the size of the circuit breaker through connection of the telescopic mechanism, and after adjustment, the two lever structures are rotated to drive the circuit breaker to act. The stability of the two lever structures can be improved, the two lever structures are convenient to store after moving to the shortest distance, and the circuit breaker can be widely applied to circuit breakers with different shell frame ranges.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a plugging and unplugging assisting device for a circuit breaker. Background Art

[0002] A circuit breaker is an important electrical component in the field of low-voltage electricity, which can connect and disconnect an external circuit, and automatically cut off the circuit when overcurrent or short circuit occurs in the external circuit to protect the external circuit. Plug-in connection is one of the many connection methods of a circuit breaker. The circuit breaker is electrically connected to an external conductive part through a clamping contact. The plug-in circuit breaker is usually installed in a cabinet, and the installation is time-consuming and laborious and difficult. Some of the existing plugging and unplugging mechanisms have unreasonable force application points and are prone to jamming during use. In addition, the existing plugging and unplugging assisting devices have low versatility. Due to the large variety, complex structure and large size of circuit breakers, and the small space of the cabinet of the small-frame circuit breaker (especially the small-frame circuit breaker near the outside), it is difficult for the plugging and unplugging assisting device to be compatible with circuit breakers of different frame ranges. Summary of the Invention

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide a plugging and unplugging assisting device for a circuit breaker.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A plugging and unplugging assisting device for a circuit breaker includes two lever structures arranged oppositely. The two lever structures are provided with a connecting part for connecting the circuit breaker and a supporting part for connecting the supporting structure. The two lever structures rotate around the supporting part, so that the connecting parts of the two lever structures drive the circuit breaker to move. The device also includes a telescopic mechanism connected between the two lever structures for adjusting the distance between the two lever structures.

[0006] Preferably, the lever structure includes a first lever and a second lever connected by bending. The second lever is provided with the connecting part and the supporting part. The first lever is connected to an operating handle, and the operating handle drives the second lever to rotate around the supporting part through the first lever.

[0007] Preferably, the telescopic mechanism includes at least one linkage rod. The linkage rod includes a rotating end and a moving end. The rotating end is rotatably connected to one of the lever structures, and the moving end is slidably connected to the other lever structure. When the moving end slides along the other lever structure, the distance between the two lever structures can be adjusted.

[0008] Preferably, the telescopic mechanism includes two linkage rods. The two linkage rods respectively include a rotating part and a moving part, and a connecting part connecting the rotating part and the moving part. The rotating part and the moving part are respectively used as the rotating end and the moving end, and the connecting parts of the two linkage rods are rotatably connected.

[0009] Preferably, the rotating part, the connecting part and the moving part are arranged in a straight line, or the two ends of the connecting part are bent and connected to the rotating part and the moving part.

[0010] Preferably, the rotating part and the moving part are arranged in parallel and are respectively perpendicular to the connecting part. When the positions of the connecting parts of the two linkage rods are parallel, the rotating part of one linkage rod and the moving part of the other linkage rod are located on the same straight line. When the connecting parts of the two linkage rods rotate to an inclined position, there is an overlapping part between the rotating part of one linkage rod and the moving part of the other linkage rod.

[0011] Preferably, the telescopic mechanism includes at least one linkage mechanism composed of a plurality of link rods. The plurality of link rods of the linkage mechanism are sequentially hinged. One link rod at one end of the linkage mechanism is provided with a rotating end and is rotationally connected to one of the lever structures. The link rod at the other end of the linkage mechanism is provided with a moving end and is slidably connected to the other lever structure.

[0012] Preferably, the telescopic mechanism includes at least two linkage mechanisms composed of a plurality of link rods. The plurality of link rods of the linkage mechanism are sequentially hinged. Both ends of one of the linkage mechanisms are provided with rotating ends and are rotationally connected to the two lever structures. Both ends of the other linkage mechanism are provided with moving ends and are slidably connected to the two lever structures.

[0013] Preferably, the moving end is provided with one of a sliding shaft and a sliding groove, and the lever structure slidably cooperating with the moving end is provided with the other of the sliding shaft and the sliding groove. The sliding shaft is used to be inserted into the sliding groove for sliding cooperation. When the distance between the two lever structures changes, it can drive the sliding shaft to slide in the sliding groove.

[0014] Preferably, the telescopic mechanism includes a first linkage mechanism and a second linkage mechanism. The first linkage mechanism includes two first link rods, and the second linkage mechanism includes two second link rods. One ends of the two first link rods are rotationally connected. The mutually remote ends of the two first link rods are respectively rotationally connected to the two lever structures. One ends of the two second link rods are respectively slidably connected to the two lever structures. The two first link rods and the two second link rods are correspondingly arranged in a crossed manner. The middle parts of the correspondingly arranged first link rod and the second link rod are rotationally connected through a rotating member.

[0015] Preferably, the rotating end is provided with a pivot shaft, and the lever structure is provided with a pivot hole. The pivot shaft is used to be inserted into the pivot hole for rotational connection.

[0016] Preferably, a filling structure is provided between the rotating end and / or the moving end and the lever structure. The filling structure is a gasket, or the filling structure is a convex platform protruding from the lever structure, or the filling structure is a bend protruding from the rotating end and / or the moving end towards the lever structure.

[0017] Preferably, at least one connecting shaft serving as a connecting portion is provided on the lever structure.

[0018] Preferably, separate connecting shafts are respectively provided on the two lever structures.

[0019] Preferably, at least two connecting shafts are provided on the lever structure. The at least two connecting shafts include a first connecting shaft and a second connecting shaft. A roller for rolling along the surface of the circuit breaker is provided on the first connecting shaft for pushing the circuit breaker to insert, and the second connecting shaft is used to pull out the circuit breaker.

[0020] Preferably, the lever structure includes two side plates arranged oppositely and a top plate for connecting the two side plates. The top plate is provided with a sliding groove. The two side plates are respectively in an L shape and both include a first lever portion and a second lever portion connected by bending. The second lever portions of the two side plates are arranged oppositely to form the second lever, and the first lever portions of the two side plates are arranged oppositely to form the first lever. The top plate is at least connected between the first lever portions of the two side plates.

[0021] Preferably, a first connecting shaft for connecting the circuit breaker is provided between the two second lever portions. The first connecting shaft is fixedly connected to the two second lever portions respectively. A roller for rolling along the surface of the circuit breaker is provided on the first connecting shaft, and the roller is arranged between the two second lever portions.

[0022] Preferably, a second connecting shaft for connecting the circuit breaker is provided between the two second lever portions. Adjusting chutes are respectively provided on the two second lever portions, and two ends of the second connecting shaft are respectively inserted into the adjusting chutes of the two second lever portions for sliding fit.

[0023] Preferably, a plurality of second connecting shafts are included, and a plurality of adjusting chutes corresponding to the plurality of connecting shafts are respectively provided on the two second lever portions.

[0024] Preferably, the operating handle includes a driving portion connected to the lever structure. The driving portion is inserted between the two first lever portions and the top plate to be connected to the two first lever portions.

[0025] Preferably, a positioning plate is provided between the driving portion of the operating handle and the top plate of the lever structure. A sliding plate groove is provided on the positioning plate. The sliding shaft is connected to the sliding plate, and the sliding plate is slidably arranged in the sliding plate groove. A plurality of positioning grooves are provided in the sliding plate groove, and the sliding plate can be engaged with and disengaged from the positioning grooves when sliding in the sliding plate groove.

[0026] Preferably, the operating handle includes a driving part, a hand-held part, and a bending part connected between the driving part and the hand-held part. The driving part is connected to the lever structure, and the bending part is located on the side of the driving part close to another operating handle, so that the hand-held parts of the two operating handles are located above the two driving parts.

[0027] Preferably, it further includes a reinforcing plate connected to the operating handle, and the operating handle and the reinforcing plate are made of different materials respectively.

[0028] Preferably, the reinforcing plate includes a reinforcing driving plate, a reinforcing bending plate, and a reinforcing hand-held plate respectively corresponding to the driving part, the bending part, and the hand-held part. The reinforcing bending plate is connected between the reinforcing driving plate and the reinforcing hand-held plate, and the reinforcing driving plate, the reinforcing bending plate, and the reinforcing hand-held plate are respectively located on the side of the corresponding driving part, bending part, and hand-held part close to another operating handle.

[0029] Preferably, the operating handle is made of plastic and the reinforcing plate is made of metal material.

[0030] Preferably, the supporting part is arranged at one end where the second lever is connected to the first lever, or the supporting part is arranged at one end of the second lever far from the first lever.

[0031] Preferably, the supporting part is a connecting seat, and the connecting seat includes two clamping plates arranged oppositely and a bottom plate connected between the two clamping plates. The bottom plate is provided with a positioning pin for detachably connecting with the supporting structure.

[0032] In the plugging and unplugging assisting device of the circuit breaker in this embodiment, the two lever structures are connected by a telescopic mechanism, so that the distance between the two lever structures can be adjusted according to the size of the circuit breaker. After adjustment, the two lever structures are rotated to drive the circuit breaker to act, which can not only improve the stability of the two lever structures, but also facilitate storage after the two lever structures move to the closest distance, and can be widely used for circuit breakers with different frame ranges.

[0033] In addition, the Z-shaped linkage rod not only has the characteristics of simple structure, small assembly difficulty, balanced force, and reasonable rotation stroke setting, but also has more overlapping parts after the two Z-shaped linkage rods rotate. Therefore, the contact area between the two linkage rods is larger, the transmission of force between the two linkage rods is more reasonable, and it is not easy to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic structural diagram of the plugging and unplugging assisting device of the present invention;

[0035] Figure 2 is the present invention Figure 1 partial exploded view;

[0036] Figures 3-4 is a schematic diagram of the cooperation between the plugging and unplugging assistance device of the present utility model and circuit breakers of different sizes;

[0037] Figures 5-6 is a schematic diagram of the operation of the plugging and unplugging assistance device of the present utility model;

[0038] Figure 7 is the second embodiment of the lever structure of the present utility model;

[0039] Figure 8 is the first embodiment of the telescopic mechanism of the present utility model;

[0040] Figure 9 is the second embodiment of the telescopic mechanism of the present utility model;

[0041] Figure 10 is the fourth embodiment of the telescopic mechanism of the present utility model;

[0042] In the figure, 1. Lever structure; 2. Telescopic mechanism; 3. Circuit breaker; 11. First lever; 12. Second lever; 13. Connecting shaft; 30. Hook; 14. Connecting seat; 4. Support structure; 5. Operating handle; 21. Link rod; 22. Rotating end; 23. Mobile end; 24. Sliding shaft; 25. Sliding groove; 20. Rotating part; 26. Pivot shaft; 27. Pivot hole; 211. Rotating part; 212. Moving part; 213. Connecting part; 28. Gasket; 201. First connecting rod; 202. Second connecting rod; 15. Top plate; 131. First connecting shaft; 132. Second connecting shaft; 133. Roller; 134. Adjusting chute; 141. Clamp plate; 142. Bottom plate; 143. Rotating shaft; 144. Shaft hole; 145. Positioning pin; 51. Driving part; 52. Hand - holding part; 53. Bending part; 61. Reinforcing driving plate; 62. Reinforcing bending plate; 63. Reinforcing hand - holding plate; 7. Positioning plate; 71. Slide plate groove; 240. Slide plate; 72. Positioning groove. Detailed implementation manners

[0043] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the plugging and unplugging assistance device for the circuit breaker of the present utility model. The plugging and unplugging assistance device for the circuit breaker of the present utility model is not limited to the descriptions of the following embodiments.

[0044] As Figures 1-4As shown in the figure, the plugging and unplugging assisting device of the circuit breaker in this embodiment includes two relatively arranged lever structures 1 and a telescopic mechanism 2 connected between the two lever structures 1. The two lever structures 1 are respectively used to drive the circuit breaker 3 to move when rotating, so as to realize the pulling out and / or inserting of the circuit breaker. The telescopic mechanism 2 is used to adjust the distance between the two lever structures 1 to adapt to circuit breakers 3 with different frame ranges. Operation handles 5 are provided on the two lever structures 1, as well as a connecting part for connecting the circuit breaker and a supporting part for connecting the supporting structure 4. The operation handles 5 drive the two lever structures 1 to rotate around the supporting part, so that the connecting parts on the two lever structures 1 drive the circuit breaker 3 to move, realizing the pulling out and / or inserting of the circuit breaker. When the two lever structures 1 move closer to and away from each other, they can drive the telescopic mechanism 2 to expand and contract. When one lever structure 1 rotates, it drives the other lever structure 1 to rotate through the telescopic mechanism 2.

[0045] For the plugging and unplugging assisting device of the circuit breaker 3 in this embodiment, the two lever structures 1 are connected by the telescopic mechanism 2, so that the distance between the two lever structures 1 can be adjusted according to the size of the circuit breaker 3. After adjustment, the two lever structures 1 are rotated to drive the circuit breaker 3 to act, which can not only improve the stability of the two lever structures 1, but also facilitate storage after the two lever structures 1 move to the closest distance, and can be widely used for circuit breakers 3 with different frame ranges. It should be noted that operation handles 5 can be provided on both of the two lever structures 1, or only on one of the lever structures 1; preferably, connecting parts and supporting parts are provided on both of the two lever structures 1, or only one of the lever structures 1 is provided with a connecting part and / or a supporting part.

[0046] As Figures 5-6 The first embodiment showing the lever structure 1 is shown. The lever structure 1 includes a first lever 11 and a second lever 12 which are bent and connected. A connecting part for connecting the circuit breaker and a supporting part for connecting the supporting structure 4 are provided on the second lever 12. The first lever 11 is connected to the operation handle 5. The operation handle 5 drives the second lever 12 to rotate around the supporting part through the first lever 11, so that the connecting part on the second lever 12 drives the circuit breaker 3 to move relative to the supporting structure 4, realizing the pulling out and / or inserting of the circuit breaker. The supporting structure 4 is usually located on the power distribution cabinet or cabinet where the circuit breaker is installed, or can also be located on other fixed structures such as walls. The supporting part of the plugging and unplugging assisting device supports on the supporting structure 4 to provide a supporting force, and the first lever 11 rotates around the supporting part.

[0047] In this embodiment, the connecting part is the connecting shaft 13, which is connected to the hook 30 on the circuit breaker through the connecting shaft 13 and is used to pull out the circuit breaker 3; the supporting part is the connecting seat 14, and a positioning pin 145 is provided on the connecting seat 14. It should be noted that the connecting part and the supporting part are not limited to the above structures, and other methods such as snap fasteners can also be used. In addition, the structures of the two lever structures 1 in this embodiment are the same. Of course, they can also be not completely the same. For example, an operating handle 5 can be provided only on one lever structure 1; as another deteriorated embodiment, the connecting part and the supporting part can be provided only on one lever structure 1.

[0048] In this embodiment, one end of the first lever 11 and the second lever 12 where the connecting seat 14 is provided are connected, making the overall lever structure 1 in an L shape, that is, the connecting seat 14 is arranged at the end where the second lever 12 and the first lever 11 are connected. One end of the first lever 11 and the second lever 12 where the connecting seat 14 is provided are connected. The connecting seat 14 is the rotation center of the lever structure 1, so that Figure 5 pushing the operating handle 5 in the clockwise direction can pull out the circuit breaker 3, so that Figure 6 pushing the operating handle 5 in the counterclockwise direction can push the circuit breaker 3 in and make the circuit breaker 3 installed in place.

[0049] As Figure 7 shown in the second embodiment of the lever structure 1, in this embodiment, one ends of the first lever 11 and the second lever 12 far from the connecting seat 14 are connected, that is, the connecting seat 14 is arranged at the end of the second lever 12 far from the first lever 11. The operating handle 5 also drives the second lever 12 to rotate around the connecting seat 14 through the first lever 11, so that the connecting shaft 13 on the second lever 12 drives the circuit breaker 3 to move relative to the supporting structure 4.

[0050] As Figure 8 shown in the first embodiment of the telescopic mechanism 2, the telescopic mechanism 2 includes at least one linkage rod 21. The linkage rod 21 includes a rotating end 22 and a moving end 23. The rotating end 22 is rotatably connected to one of the lever structures 1, and the moving end 23 is slidably connected to another lever structure 1. When the moving end 23 slides along the other lever structure 1, the distance between the two lever structures 1 can be adjusted. The moving end 23 and the other lever structure 1 with which it slides cooperate through a sliding shaft 24 and a sliding groove 25. One of the sliding shaft 24 and the sliding groove 25 is provided on the other lever structure 1, and the other of the sliding shaft 24 and the sliding groove 25 is provided on the moving end 23. The sliding shaft 24 is used to be inserted into the sliding groove 25 for sliding cooperation. When the distance between the two lever structures 1 changes, it can drive the sliding shaft 24 to slide in the sliding groove 25. When one lever structure 1 rotates around the connecting seat 14 to insert or pull out the circuit breaker, the other lever structure 1 is driven to rotate synchronously through the linkage rod 21.

[0051] Specifically, the telescopic mechanism 2 of this embodiment includes one of the linkage rods 21. The linkage rod 21 is a flat plate structure in a straight line shape. The rotating end 22 of the linkage rod 21 is rotatably connected to one of the lever structures 1. A pivot shaft 26 is provided at the rotating end 22, and a pivot hole 27 is provided in the lever structure 1. The pivot shaft 26 is used to be inserted into the pivot hole 27 to rotatably connect the rotating end 22 to the lever structure 1. A sliding groove 25 is provided in the other lever structure 1. A sliding shaft 24 is provided at the moving end 23 of the linkage rod 21. The sliding shaft 24 is used to be inserted into the sliding groove 25 for sliding cooperation. When the distance between the two lever structures 1 changes, it can drive the sliding shaft 24 to slide in the sliding groove 25. Although only one linkage rod 21 is provided in this embodiment, it has the characteristics of simple structure and low cost, and is not easily jammed.

[0052] It can be understood that in this embodiment and other embodiments, the positions of the sliding shaft 24 and the sliding groove 25 can also be swapped. For example, a sliding groove 25 is provided on the linkage rod 21, and a sliding shaft 24 is provided on the lever structure 1. The sliding groove 25 of the linkage rod 21 is sleeved on the sliding shaft 24 for sliding. Similarly, the positions of the pivot shaft 26 and the pivot hole 27 can also be swapped, which all belong to the protection scope of the present invention.

[0053] As Figure 9 As shown in the second embodiment of the telescopic mechanism 2, the telescopic mechanism 2 of this embodiment includes two linkage rods 21 respectively corresponding to the two lever structures 1. The two linkage rods 21 are both flat plate structures in a straight line shape. Both of the two linkage rods 21 are provided with a rotating end 22 and a moving end 23. The rotating ends 22 of the two linkage rods 21 are respectively rotatably connected to the two lever structures. The moving ends 23 of the two linkage rods 21 are respectively slidably connected to the two lever structures. The moving ends 23 of the two linkage rods 21 are respectively provided with a sliding shaft 24. The two lever structures 1 are respectively provided with a sliding groove 25. The rotating ends 22 of the two linkage rods 21 are respectively rotatably connected to the corresponding lever structure 1. The sliding shafts 24 of the two linkage rods 21 are respectively inserted into the sliding grooves 25 of the other lever structure 1 for sliding cooperation. When the distance between the two lever structures 1 changes, it can drive the sliding shafts 24 of the two linkage rods 21 to slide in the corresponding sliding grooves 25 respectively.

[0054] Preferably, the middle parts of the two linkage rods 21 are rotatably connected by a rotating member 20, which can not only connect the two linkage rods 21, improve the strength of the linkage rods 21, and reduce the occurrence of jamming, but also limit the two lever structures 1 to only move in the approaching and separating directions.

[0055] As Figures 1-4Shows a third embodiment of the telescopic mechanism 2. The telescopic mechanism 2 of this embodiment includes two linkage rods 21 respectively corresponding to two lever structures 1. The two linkage rods 21 are both flat structures in a Z-shaped shape. The two linkage rods 21 respectively include a rotating part 211 and a moving part 212, and a connecting part 213 connected between the rotating part 211 and the moving part 212. The rotating part 211 and the moving part 212 respectively serve as the rotating end 22 and the moving end 23. The connecting parts 213 of the two linkage rods 21 are rotatably connected. The difference from the second embodiment is that in this embodiment, both ends of the connecting part 213 are bent and connected to the rotating part 211 and the moving part 212, while in the second embodiment, the rotating part 211, the connecting part 213 and the moving part 212 are arranged in a straight line.

[0056] Furthermore, the rotating part 211 and the moving part 212 are arranged in parallel and are respectively perpendicular to the connecting part 213. When the positions of the connecting parts 213 of the two linkage rods 21 are parallel, the rotating part 211 of one linkage rod 21 and the moving part 212 of the other linkage rod 21 are located on the same straight line. At this time, the two lever structures 1 are the closest to each other. Figure 1 When the two lever structures 1 move away from each other, they drive the connecting parts 213 of the two linkage rods 21 to rotate to an inclined angle position, and there is an overlapping part between the rotating part 211 of one linkage rod 21 and the moving part 212 of the other linkage rod 21. The Z-shaped linkage rod 21 not only has the characteristics of simple structure, small assembly difficulty, balanced force, and reasonable rotation stroke setting, but also has more overlapping parts after the two Z-shaped linkage rods 21 rotate. Therefore, the contact area between the two linkage rods 21 is larger, making the transmission of force between the two linkage rods 21 more reasonable and not easily damaged. It can be understood that the rotating part 211 and the moving part 212 may not be perpendicular to the connecting part 213, the connecting part 213 may also be inclined and connected between the rotating part 211 and the moving part 212, and the linkage rod 21 may also adopt other shapes, such as wavy, which all fall within the protection scope of the present invention.

[0057] Furthermore, a filling structure is provided between the rotating end 22 and / or the moving end 23 and the lever structure 1. The filling structure is a gasket 28 respectively sleeved on the pivot shaft 26 and the sliding shaft 24, or the filling structure is a boss (not shown in the figure) that the lever structure 1 protrudes towards the linkage rod 21 or the connecting rod, or the filling structure is a bend (not shown in the figure) that the rotating end 22 and / or the moving end 23 protrudes towards the lever structure 1. The gasket 28 is sleeved on the sliding shaft 24 and the pivot shaft 26, which can make the sliding shaft 24 and the pivot shaft 26 adopt the same structure, and make the sliding shaft 24 and the pivot shaft 26 universal during assembly. Preferably, a gasket 28 is also provided between the rotating member 20 and the linkage rod 21. Of course, the filling structure may not be provided, which all fall within the protection scope of the present invention.

[0058] As Figure 10 shown in the fourth embodiment of the telescopic mechanism 2, the telescopic mechanism 2 includes two link mechanisms respectively composed of links. The two link mechanisms are the first link mechanism and the second link mechanism. The first link mechanism includes two first links 201 respectively serving as links. The second link mechanism includes two second links 202 respectively serving as links. The two first links 201 are arranged in a corresponding and crossed manner with the two second links 202. The middle parts of the correspondingly arranged first link 201 and second link 202 are rotatably connected through a rotating member 20. One ends of the two first links 201 are rotatably connected. The mutually remote ends of the two first links 201 are respectively rotatably connected to the two lever structures 1. Sliding shafts 24 are respectively provided at one ends of the two second links 202. Sliding grooves 25 are respectively provided on the two lever structures 1. The sliding shafts 24 of the two second links 202 are respectively inserted into the sliding grooves 25 of the two lever structures 1 for sliding fit. When the distance between the two lever structures 1 changes, it can drive the two link mechanisms to expand and contract respectively.

[0059] It can be understood that the number of links in both the first link mechanism and the second link mechanism can be increased. For example, a link is added between the two first links 201 of the first link mechanism. The two ends of the link are respectively rotatably connected to the first link 201. At this time, one end of the first link mechanism is rotatably connected to the lever structure 1, and the other end is slidably connected; or two links are added. One ends of the two links are rotatably connected, and the mutually remote ends are respectively rotatably connected to the first link 201. The second link mechanism can also add links in the same way, which all belong to the protection scope of the present invention.

[0060] For example, as other embodiments, referring to Figure 10 , the telescopic mechanism 2 includes at least one link mechanism composed of multiple links. For example, the link mechanism includes three third links. The three third links are sequentially hinged to form a link mechanism. A rotating end 22 is provided on one of the third links at one end of the link mechanism and is rotatably connected to one of the lever structures 1. A moving end 23 is provided on one of the third links at the other end of the link mechanism and is slidably connected to the other lever structure 1. The telescopic mechanism 2 can include one link mechanism or two or more link mechanisms.

[0061] That is, the telescopic mechanism 2 includes at least one linkage mechanism composed of a plurality of linkages. The multiple linkages of the linkage mechanism are sequentially hinged. One linkage at one end of the linkage mechanism is provided with a rotating end 22 which is rotatably connected to one of the lever structures 1, and the linkage at the other end of the linkage mechanism is provided with a moving end 23 which is slidably connected to the other lever structure 1; or, the telescopic mechanism 2 includes at least two linkage mechanisms composed of a plurality of linkages. The multiple linkages of the linkage mechanism are sequentially hinged. Rotating ends 22 are provided at both ends of one of the linkage mechanisms and are rotatably connected to the two lever structures 1, and moving ends 23 are provided at both ends of the other linkage mechanism and are slidably connected to the two lever structures 1.

[0062] As Figures 1-3 , on the second lever 12 of the lever structure 1 of this embodiment, a connecting shaft 13 serving as a connecting portion and a connecting seat 14 serving as a supporting portion are provided. One or more connecting portions can be provided on the lever structure 1. For example, a plurality of connecting portions with different structures can be provided to match circuit breakers with different connection methods; or a plurality of connecting portions with the same structure can be provided to match circuit breakers at different connection positions; or a plurality of connecting portions can be provided, which are respectively used for pulling out or inserting the circuit breaker.

[0063] Preferably, separate connecting shafts 13 are respectively provided on the two lever structures 1, and the connecting shafts 13 on the two lever structures 1 are respectively connected to two hooks 30 on the circuit breaker. When the positions of the two lever structures 1 are adjusted by the telescopic mechanism 2, the connecting shaft 13 will not be affected. As a deteriorated embodiment, it can also be a long integral connecting shaft 13 connected between the two lever structures 1, and corresponding holes are provided on the second lever 12 of the lever structure 1. When the positions of the two lever structures 1 are adjusted by the telescopic mechanism 2, the holes are used for avoidance.

[0064] As Figures 1-3 In the embodiment of the lever structure 1 shown, the side surface of each lever structure 1 is L-shaped and the cross-section is U-shaped. Each lever structure 1 includes two side plates arranged oppositely and a top plate 15 for connecting the two side plates. The top plate 15 is provided with the sliding groove 25. The two side plates are both L-shaped and constitute the first lever 11 and the second lever 12. Both side plates include a first lever portion and a second lever portion that are bent and connected. The second lever portions of the two side plates are arranged oppositely to constitute the second lever 12, and the first lever portions of the two side plates are arranged oppositely to constitute the first lever 11. The top plate 15 is at least connected between the first lever portions of the two side plates. By providing the two side plates and the top plate 15 connected between the two side plates, the lever structure 1 has a relatively high strength and is also convenient for the arrangement of the connecting shaft 13. Of course, only one side plate can also be provided, which all belong to the protection scope of the present invention.

[0065] Further, at least one connecting shaft 13 serving as a connecting portion is provided on two second lever portions of the lever structure 1. The connecting shaft 13 is used to connect the hook 30 of the circuit breaker 3. When the hook 30 is hung on the connecting shaft 13, when the lever structure 1 rotates, the hook 30 is driven by the connecting shaft 13 to pull out the circuit breaker 3. When pushing the circuit breaker 3 in, it is not necessary for the hook 30 to be hung on the connecting shaft 13.

[0066] Further, at least two connecting shafts 13 are provided on the lever structure 1 of this embodiment. The at least two connecting shafts 13 include a first connecting shaft 131 and a second connecting shaft 132. The first connecting shaft 131 is fixedly connected to the second lever portion. A roller 133 for rolling along the surface of the circuit breaker 3 is provided on the first connecting shaft 131, which is used to push the circuit breaker into the power distribution cabinet or cabinet. The roller 133 is arranged between the two second lever portions. Adjusting chutes 134 are respectively provided on the two second lever portions. Both ends of the second connecting shaft 132 are inserted into the adjusting chutes 134 of the second lever portion for sliding fit. The second connecting shaft 132 can move correspondingly in the adjusting chute 134 according to the position of the hook 30 on the circuit breaker 3 until the second connecting shaft 132 can be aligned with the hook 30 on the circuit breaker 3, thereby matching circuit breakers 3 of different sizes. The second connecting shaft 132 is used to pull out the circuit breaker from the power distribution cabinet or cabinet. Of course, the first connecting shaft 131 can also be used to connect the hook 30.

[0067] Further, the lever structure 1 may include a plurality of second connecting shafts 132. A plurality of adjusting chutes 134 corresponding to the plurality of connecting shafts 13 are respectively provided on the two second lever portions. Both ends of the second connecting shaft 132 are respectively inserted into the corresponding adjusting chutes 134 on the two second lever portions for fixed connection or sliding fit. Therefore, as the number of the second connecting shafts 132 increases, the fixed connection can also play the function of adapting to circuit breakers 3 of different sizes, and all belong to the protection scope of the present invention.

[0068] Further, the connecting seat 14 is in a U-shaped configuration. The connecting seat 14 includes two clamping plates 141 arranged oppositely, and a bottom plate 142 connected between the two clamping plates 141. Shaft holes 144 for cooperating with the rotating shaft 143 are respectively provided on the two clamping plates 141. The two clamping plates 141 are connected to the two second lever portions through the rotating shaft 143. A positioning pin 145 for detachably connecting with the support structure 4 is provided on the bottom plate 142. The support structure 4 of this embodiment is an insertion frame of a power distribution cabinet, and there are two through holes of different sizes on the insertion frame. The positioning pin 145 is first inserted into the larger through hole, and then horizontally shifted and slid into the smaller through hole, so that the positioning pin 145 cannot be pulled out, realizing the detachable connection. In other embodiments, the support structure 4 can also be a distribution box body, a wall, etc., which are not specifically limited here.

[0069] In the present embodiment, the rotating shaft 143 is provided with a shaft shoulder and a snap ring (not shown in the figure). The rotating shaft 143 is limited by the shaft shoulder and the snap ring with the connecting seat 14. Alternatively, threads can be provided in the shaft holes 144 of the two clamping plates 141 to fix the rotating shaft 143, or bosses for limiting the rotating shaft 143 and through holes for passing through the bosses can be respectively provided on the two clamping plates 141, so that the rotating shaft 143 is inserted and abutted between the two clamping plates 141 for fixation. It can be understood that the first connecting shaft 131 and the second connecting shaft 132 can also be limited to the second lever portion by the above-mentioned shaft shoulder and snap ring method, or by the above-mentioned thread and boss method to limit the second lever portion, which all fall within the protection scope of the present invention.

[0070] As Figure 2 shown, the operating handle 5 is in a Z shape. The operating handle 5 includes a driving portion 51, a hand-held portion 52, and a bending portion 53 connected between the driving portion 51 and the hand-held portion 52. The driving portion 51 is connected to the lever structure 1. In the present embodiment, the driving portion 51 is inserted between the two first lever portions and the top plate 15 and is fixedly connected to the two first lever portions respectively. The bending portion 53 faces the side of the driving portion 51 close to the other operating handle 5, so that the hand-held portions 52 of the two operating handles 5 are located above the two driving portions 51. The distance between the two hand-held portions 52 can be reduced, which is convenient for simultaneously pushing the two operating handles 5 to drive the lever structure 1 to rotate, reducing the force on the telescopic mechanism 2 and extending the service life. Of course, the driving portion 51 and the lever structure 1 can also be connected in other ways, such as screws and rivets.

[0071] It should be noted that the operating handle 5 can also be of other structures. For example, corresponding hand-holding holes are provided on the operating handle 5 for pulling operations. A connecting member with an adjustable length can be provided for the two operating handles 5 for operation, etc. The operating handle 5 can be integrally provided or separately provided with the lever structure 1.

[0072] Furthermore, the plugging and unplugging assisting device of the present embodiment further includes a reinforcing plate connected to the operating handle 5. The reinforcing plate is in a Z shape. The reinforcing plate includes a reinforcing driving plate 61, a reinforcing bending plate 62, and a reinforcing hand-held plate 63 respectively corresponding to the driving portion 51, the bending portion 53, and the hand-held portion 52. The reinforcing bending plate 62 is connected between the reinforcing driving plate 61 and the reinforcing hand-held plate 63. At least one of the reinforcing driving plate 61, the reinforcing bending plate 62, and the reinforcing hand-held plate 63 is connected to the corresponding driving portion 51, bending portion 53, and hand-held portion 52. The reinforcing driving plate 61, the reinforcing bending plate 62, and the reinforcing hand-held plate 63 are respectively located on the sides of the corresponding driving portion 51, bending portion 53, and hand-held portion 52 close to the other operating handle 5. The reinforcing plate can play a role in strengthening the strength of the operating handle 5.

[0073] Preferably, the operating handle 5 and the reinforcing plate are made of different materials. The operating handle 5 is made of plastic and the reinforcing plate is made of metal material, so that the operating handle 5 takes into account both strength and insulation. The reinforcing plate is connected to the operating handle 5 by screws. Of course, the reinforcing plate may not be provided, and all of them fall within the protection scope of the present invention.

[0074] Further, a positioning plate 7 is provided between the driving part 51 of the operating handle 5 and the top plate 15 of the lever structure 1. A sliding plate groove 71 is provided on the positioning plate 7. The sliding shaft 24 is connected to the sliding plate 240. The sliding plate 240 is slidably arranged in the sliding plate groove 71. A plurality of positioning grooves 72 are provided in the sliding plate groove 71. When the sliding plate 240 slides in the sliding plate groove 71, it can be engaged with and disengaged from the positioning grooves 72. Several common gears can be preset through the positioning grooves 72, which is convenient for adjustment during use. Moreover, the positioning plate 7 is arranged between the operating handle 5 and the top plate 15 of the lever structure 1, and a space for accommodating the sliding plate 240 on the sliding shaft 24 can also be left through the sliding plate groove 71. The shoulder at the connection between the sliding plate 240 and the sliding shaft 24 can also be used to limit the sliding shaft 24, which has the characteristics of few parts and compact structure. Of course, it can also be used without the sliding plate 240 being engaged with the positioning grooves 72, that is, it can be used without reserved corresponding gears. In addition, the positioning plate 7 can also be arranged outside the lever structure 1, or the positioning grooves 72 can be arranged in the sliding groove 25 to limit the sliding shaft 24, or the positioning plate 7 can be not provided, and all of them fall within the protection scope of the present invention.

[0075] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0076] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all of them should be regarded as belonging to the protection scope of the present invention.

Claims

1. A plug-in assist device for a circuit breaker, comprising two lever structures (1) arranged opposite to each other, wherein the two lever structures (1) are provided with a connecting portion for connecting the circuit breaker and a supporting portion for connecting a supporting structure (4), and the two lever structures (1) rotate around the supporting portion so that the connecting portion of the two lever structures (1) drives the circuit breaker (3) to move, characterized in that: It also includes a telescopic mechanism (2) connected between the two lever structures (1) and used for adjusting the distance between the two lever structures (1).

2. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The lever structure (1) comprises a first lever (11) and a second lever (12) which are bent and connected, the second lever (12) being provided with the connecting portion and the supporting portion, the first lever (11) being connected to an operating handle (5), and the operating handle (5) drives the second lever (12) to rotate around the supporting portion via the first lever (11).

3. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The telescopic mechanism (2) comprises at least one linkage rod (21), wherein the linkage rod (21) comprises a rotating end (22) and a movable end (23), wherein the rotating end (22) is rotationally connected to one of the lever structures (1), and the movable end (23) is slidingly connected to the other lever structure (1), and when the movable end (23) slides along the other lever structure (1), the distance between the two lever structures (1) can be adjusted.

4. The plug-in assist device for a circuit breaker according to claim 3, characterized in that: The telescopic mechanism (2) comprises two linkage rods (21), the two linkage rods (21) respectively comprising a rotating portion (211) and a moving portion (212), and a connecting portion (213) connected between the rotating portion (211) and the moving portion (212), the rotating portion (211) and the moving portion (212) respectively serving as the rotating end (22) and the moving end (23), and the connecting portions (213) of the two linkage rods (21) are rotatably connected.

5. The plug-in assist device for a circuit breaker according to claim 4, characterized in that: The rotating part (211), the connecting part (213) and the moving part (212) are arranged in a straight line, or two ends of the connecting part (213) are bent and connected to the rotating part (211) and the moving part (212).

6. The plug-in assist device for a circuit breaker according to claim 4, characterized in that: The rotating part (211) and the moving part (212) are arranged in parallel and are respectively arranged perpendicular to the connecting part (213); when the connecting parts (213) of the two linkage rods (21) are in parallel, the rotating part (211) of one linkage rod (21) and the moving part (212) of the other linkage rod (21) are located in the same straight line; when the connecting parts (213) of the two linkage rods (21) are rotated to an oblique angle position, there is an overlapping portion between the rotating part (211) of one linkage rod (21) and the moving part (212) of the other linkage rod (21).

7. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The telescopic mechanism (2) comprises at least one connecting rod mechanism composed of a plurality of connecting rods, wherein the plurality of connecting rods of the connecting rod mechanism are hinged in sequence, a connecting rod at one end of the connecting rod mechanism is provided with a rotating end (22) which is rotatably connected to one of the lever structures (1), and a connecting rod at the other end of the connecting rod mechanism is provided with a moving end (23) which is slidably connected to the other lever structure (1).

8. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The telescopic mechanism (2) comprises at least two connecting rod mechanisms composed of a plurality of connecting rods, wherein the plurality of connecting rods of the connecting rod mechanisms are hinged in sequence, wherein two ends of one of the connecting rod mechanisms are provided with rotating ends (22) which are rotatably connected to the two lever structures (1), and two ends of the other connecting rod mechanism are provided with moving ends (23) which are slidably connected to the two lever structures (1).

9. The plug-in assist device for a circuit breaker according to any one of claims 3 to 8, characterized in that: The movable end (23) is provided with one of a sliding shaft (24) and a sliding groove (25), and the lever structure (1) which is slidably matched with the movable end (23) is provided with the other of the sliding shaft (24) and the sliding groove (25), and the sliding shaft (24) is used to be inserted into the sliding groove (25) for sliding match, and when the distance between the two lever structures (1) changes, the sliding shaft (24) can be driven to slide in the sliding groove (25).

10. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The telescopic mechanism (2) comprises a first link mechanism and a second link mechanism, wherein the first link mechanism comprises two first links (201), and the second link mechanism comprises two second links (202), one end of the two first links (201) are rotatably connected, the ends of the two first links (201) that are away from each other are rotatably connected to the two lever structures (1), one end of the two second links (202) are slidably connected to the two lever structures (1), the two first links (201) are cross-arranged correspondingly to the two second links (202), and the middle parts of the correspondingly arranged first links (201) and second links (202) are rotatably connected via a rotating member (20).

11. The plug-in assist device for a circuit breaker according to any one of claims 3 to 8, characterized in that: The rotating end (22) is provided with a pivot shaft (26), and the lever structure (1) is provided with a pivot hole (27), and the pivot shaft (26) is used to be inserted into the pivot hole (27) for rotational connection.

12. The plug-in assist device for a circuit breaker according to claim 11, characterized in that: A filling structure is provided between the rotating end (22) and / or the moving end (23) and the lever structure (1); the filling structure is a gasket (28), or the filling structure is a protruding boss of the lever structure (1), or the filling structure is a bend of the rotating end (22) and / or the moving end (23) protruding toward the lever structure (1).

13. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The lever structure (1) is provided with at least one connecting shaft (13) as a connecting part.

14. The plug-in assist device for a circuit breaker according to claim 13, characterized in that: The two lever structures (1) are respectively provided with separate connecting shafts (13).

15. The plug-in assist device for a circuit breaker according to claim 13, characterized in that: The lever structure (1) is provided with at least two connecting shafts (13), the at least two connecting shafts (13) comprising a first connecting shaft (131) and a second connecting shaft (132), the first connecting shaft (131) being provided with a roller (133) for rolling along the surface of the circuit breaker (3) for pushing the circuit breaker to be inserted, and the second connecting shaft (132) being used for pulling out the circuit breaker (3).

16. The plug-in assist device for a circuit breaker according to claim 2, characterized in that: The lever structure (1) comprises two side plates arranged opposite to each other, and a top plate (15) for connecting the two side plates, the top plate (15) being provided with a sliding groove (25), the two side plates being respectively L-shaped, and each comprising a first lever portion and a second lever portion connected by bending, the second lever portions of the two side plates being arranged opposite to each other to form the second lever (12), and the first lever portions of the two side plates being arranged opposite to each other to form the first lever (11), and the top plate (15) being connected at least between the first lever portions of the two side plates.

17. The plug-in assist device for a circuit breaker according to claim 16, characterized in that: A first connecting shaft (131) for connecting the circuit breaker (3) is provided between the two second lever parts; the first connecting shaft (131) is fixedly connected to the two second lever parts respectively; a roller (133) for rolling along the surface of the circuit breaker (3) is provided on the first connecting shaft (131); the roller (133) is arranged between the two second lever parts.

18. The plug-in assist device for a circuit breaker according to claim 16, characterized in that: A second connecting shaft (132) for connecting the circuit breaker (3) is provided between the two second lever parts, and adjustment slots (134) are respectively provided on the two second lever parts, and both ends of the second connecting shaft (132) are respectively inserted into the adjustment slots (134) of the two second lever parts for sliding fit.

19. The plug-in assist device for a circuit breaker according to claim 18, characterized in that: It comprises a plurality of second connecting shafts (132), and a plurality of adjusting sliding grooves (134) are respectively arranged on the two second lever parts corresponding to the plurality of connecting shafts (13).

20. The plug-in assist device for a circuit breaker according to claim 16, characterized in that: The operating handle (5) comprises a driving part (51) connected to the lever structure (1); the driving part (51) is inserted between the two first lever parts and the top plate (15) and connected to the two first lever parts.

21. The plug-in assist device for a circuit breaker according to claim 20, characterized in that: A positioning plate (7) is provided between the driving portion (51) of the operating handle (5) and the top plate (15) of the lever structure (1); a slide plate groove (71) is provided on the positioning plate (7); the sliding shaft (24) is connected to the sliding plate (240); the sliding plate (240) is slidably arranged in the slide plate groove (71); a plurality of positioning grooves (72) are provided in the slide plate groove (71); the sliding plate (240) can be inserted into and out of the positioning groove (72) when sliding in the slide plate groove (71).

22. The plug-in assist device for a circuit breaker according to claim 2, characterized in that: The operating handle (5) comprises a driving portion (51) and a grip portion (52), and a bending portion (53) connected between the driving portion (51) and the grip portion (52); the driving portion (51) is connected to the lever structure (1); the bending portion (53) is located on the side of the driving portion (51) close to the other operating handle (5), so that the grip portions (52) of the two operating handles (5) are located above the two driving portions (51).

23. The plug-in assist device for a circuit breaker according to claim 22, characterized in that: It also comprises a reinforcing plate connected to the operating handle (5), wherein the operating handle (5) and the reinforcing plate are made of different materials.

24. The plug-in assist device for a circuit breaker according to claim 23, characterized in that: The reinforcing plate comprises a reinforcing driving plate (61), a reinforcing bending plate (62) and a reinforcing hand grip plate (63) which are respectively arranged corresponding to the driving portion (51), the bending portion (53) and the hand grip portion (52); the reinforcing bending plate (62) is connected between the reinforcing driving plate (61) and the reinforcing hand grip plate (63); the reinforcing driving plate (61), the reinforcing bending plate (62) and the reinforcing hand grip plate (63) are respectively located on the side of the corresponding driving portion (51), the bending portion (53) and the hand grip portion (52) close to another operating handle (5).

25. The plug-in assist device for a circuit breaker according to claim 23, characterized in that: The operating handle (5) is made of plastic, and the reinforcing plate is made of metal.

26. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The support portion is arranged at an end of the second lever (12) connected to the first lever (11), or the support portion is arranged at an end of the second lever (12) away from the first lever (11).

27. The plug-in assist device for a circuit breaker according to claim 1, characterized in that: The support portion is a connecting seat (14), the connecting seat (14) comprising two clamping plates (141) arranged opposite to each other, and a bottom plate (142) connected between the two clamping plates (141), the bottom plate (142) being provided with a positioning pin (145) for detachably connecting to the supporting structure (4).

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