A replacement wrench for a star contact

Abstract

The utility model discloses a replace plum contact frock belongs to mechanical tool technical field, including the pincers body, the two tongs head of pincers body is connected with chain body, one end of chain body is hung through locking column no.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical tool technology, specifically a tooling for replacing the plum blossom contact. Background Technology

[0002] The plum blossom contact is a key connecting component of high-voltage circuit breakers. It consists of multiple contact fingers arranged in a ring and relies on an internal spring to provide contact pressure to achieve a low-resistance, high-conductivity connection between the moving and stationary contacts. It is widely used in high-current power transmission and distribution systems.

[0003] In the maintenance of high-voltage circuit breakers, replacing the sprite-shaped contacts is a routine but crucial operation. Currently, the main challenge facing this operation is the inconvenience of disassembly and assembly. The traditional method requires maintenance personnel to manually or with simple tools press down on the front of the contact while simultaneously overcoming the strong preload of the rear tension spring to pry it open, and then risk prying open the clip spring to complete the disassembly and assembly. This process has significant drawbacks: First, it is extremely time-consuming and labor-intensive, demanding high physical strength from personnel, especially for high-current contacts, which are larger and have stronger spring tension, significantly increasing the difficulty of disassembly and assembly, becoming a bottleneck in maintenance work. Second, due to the lack of specialized tools, the operating force relies entirely on experience, making it extremely easy for excessive or inaccurate force to cause the precision contact fingers to fall apart or for the core component spring to suffer permanent deformation, damage, and fatigue, creating potential safety hazards for the equipment.

[0004] While some general-purpose disassembly tools exist in the existing technology, they often cannot match diverse contact models due to incomplete specifications and poor adaptability; their structures are also often quite complex and bulky, making them difficult to use effectively in the narrow space of a circuit breaker cabinet.

[0005] Therefore, developing a tool that is specialized, reliable, adaptable, and can achieve labor-saving and efficient assembly and disassembly of Phillips-shaped contacts is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] To address the problems of existing disassembly tools being complex in structure, large in size, or having poor adaptability, this utility model provides a simple, easy-to-assemble, and highly adaptable tooling for replacing the Phillips head contact.

[0007] This utility model is achieved through the following technical solution: A tool for changing a plum blossom contact includes a pliers body, with a chain body connected to two pliers on the pliers body; one end of the chain body is hooked to one of the pliers by a locking pin one, and the other end of the chain body is hooked to the other pliers by a locking pin two, the locking pin two being installed on the pliers by an outer sleeve.

[0008] The chain body is wrapped around the plum blossom contact, and the pliers are used to tighten the chain body, so that the chain body and the plum blossom contact are in close contact. By operating the pliers to deflect, the preload of the spring on the plum blossom contact is overcome, and the contact is opened smoothly. At the same time, the two ends of the chain body are connected to the pliers body through locking pin one and locking pin two, respectively. It has the advantages of simple structure, safety and reliability and strong adaptability.

[0009] A further improvement of this invention is that the locking pin two comprises segments a, b, and c connected in sequence. Segment a is rotatably mounted on the outer sleeve. One end of segment b is connected to the top end of segment a, and the other end of segment b is connected to the bottom end of segment c. Segments a and c are parallel. The segmented structure of the locking pin two allows for selection of different positions on the locking pin two to contact the chain body, thereby tightening the chain body to accommodate different sizes of perforated contacts and effectively adjust the force application angle of the chain body, ensuring stable clamping.

[0010] A further improvement of this utility model is that the outer sleeve is provided with an inner sleeve, and segment a is inserted into the inner sleeve. Through the nesting and cooperation of the inner sleeve and the outer sleeve, not only is reliable rotation of segment a achieved, but also a stable support is provided for the rotation of segment a, preventing segment a from slipping outward and causing tooling failure.

[0011] A further improvement of this invention is that the pliers head is provided with a second fixing hole, into which the inner sleeve can be inserted. The inner sleeve's engagement with the second fixing hole on the pliers head helps to improve the stability of the outer sleeve's installation on the pliers head.

[0012] A further improvement of this invention is that the second fixing hole is inclined along its axis. This inclined arrangement of the second fixing hole allows the outer sleeve and the second locking pin to form a more optimal working angle during use, thereby increasing the locking force.

[0013] A further improvement of this invention is that the aforementioned locking pin is disposed on the clamping side of the pliers head. The locking pin, located inside the pliers head, tightens the chain body while simultaneously bringing the fixing point closer to the force application point of the chain body, thus optimizing the spatial layout of the tooling.

[0014] A further improvement of this utility model is that the aforementioned locking pin is inserted into the pliers head.

[0015] A further improvement of this invention is that the chain body comprises multiple interconnected chain link groups. Each chain link group includes two oppositely arranged outer chain link plates and two oppositely arranged inner chain link plates. One end of each of the two outer chain link plates is connected to two inner chain link plates via a pin, and the two inner chain link plates are located inside the two outer chain link plates. Adjacent chain link groups are connected by pins, and a roller is sleeved on the pin. The chain body ensures both high flexibility in deformation and increased contact force applied to the stylus contact, thus guaranteeing stability on the stylus contact.

[0016] A further improvement of this invention is that the first locking pin and the second locking pin are respectively inserted between two adjacent rollers. This installation method is simple in structure and quick to operate.

[0017] As can be seen from the above technical solution, the beneficial effects of this utility model are: by wrapping the chain body around the plum blossom contact, and using the pliers body to tighten the chain body, the chain body and the plum blossom contact are brought into contact. By operating the pliers body to deflect, the pre-tension force of the spring of the plum blossom contact is overcome, and the contact is opened smoothly. At the same time, the two ends of the chain body are connected to the pliers body through locking pin one and locking pin two respectively, which has the advantages of simple structure, safety and reliability and strong adaptability. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a first structural schematic diagram of a specific embodiment of the present utility model.

[0020] Figure 2 This is a second structural schematic diagram of a specific embodiment of the present utility model.

[0021] Figure 3 for Figure 2 A magnified structural diagram of part A in the diagram.

[0022] Figure 4 This is a third structural schematic diagram of a specific embodiment of the present utility model.

[0023] Figure 5 for Figure 4 A magnified structural diagram of part B in the diagram.

[0024] Figure 6 This is a schematic diagram of another installation structure of the locking post according to a specific embodiment of the present utility model.

[0025] Figure 7 This is a schematic diagram of a connection structure between the chain body and the locking post 2 in a specific embodiment of this utility model.

[0026] Figure 8 for Figure 7 A schematic diagram of the axial angle structure.

[0027] Figure 9 This is a schematic diagram of another connection structure between the chain body and the second locking post in a specific embodiment of this utility model.

[0028] Figure 10 for Figure 9 A schematic diagram of the axial angle structure.

[0029] Figure 11 This is a structural diagram showing the locking pin 2 in two usage states according to a specific embodiment of this utility model.

[0030] In the attached diagram: 10. Pliers body; 11. Operating handle; 12. Pliers head; 121. Fixing hole two; 13. Locking pin one; 14. Outer sleeve; 141. Inner sleeve; 15. Locking pin two; 151. Section a; 152. Section b; 153. Section c; 20. Chain body; 21. Outer link plate; 22. Inner link plate; 23. Pin; 24. Roller. Detailed Implementation

[0031] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0032] like Figures 1-6As shown, this utility model discloses a tool for replacing a plum blossom contact, including a pliers body 10. The pliers body 10 is composed of two halves hinged together. One end of each half is a pliers head 12, and the other end is an operating handle 11. A chain body 20 is connected to the two pliers heads 12 of the pliers body 10. One end of the chain body 20 is hooked to one of the pliers heads 12 via a locking pin 13, and the other end of the chain body 20 is hooked to the other pliers head 12 via a locking pin 25. The locking pin 25 is installed on the pliers head 12 via an outer sleeve 14. The chain body 20 is wrapped around the plum blossom contact, and the pliers body 10 is used to tighten the chain body 20, so that the chain body 20 and the plum blossom contact are in close contact. By operating the pliers body 10 to deflect, the preload of the spring on the plum blossom contact is overcome, and the contact is opened smoothly. At the same time, the two ends of the chain body 20 are connected to the pliers body 10 through locking pin 13 and locking pin 25 respectively. It has the advantages of simple structure, safety and reliability and strong adaptability.

[0033] like Figures 7-10 As shown, the chain body 20 includes multiple interconnected chain link groups. Each chain link group includes two oppositely arranged outer chain link plates 21 and two oppositely arranged inner chain link plates 22. One end of each of the two outer chain link plates 21 is connected to two inner chain link plates 22 via a pin 23. The two inner chain link plates 22 are located inside the two outer chain link plates 21. Adjacent chain link groups are connected by pins 23, and rollers 24 are sleeved on the pins 23. The chain body 20 can ensure high deformation flexibility and improve the contact force acting on the plum blossom contact, ensuring the stability acting on the plum blossom contact.

[0034] The locking pin 13 and locking pin 25 are respectively inserted between two adjacent rollers 24. This installation method is simple in structure and quick to operate.

[0035] like Figures 2-5 As shown, the locking pin 13 is disposed on the clamping side of the jaw 12, and the locking pin 13 is inserted into the fixing hole 1 of the jaw 12. The locking pin 13, located on the inner side of the jaw 12, tightens the chain body 20 while making the fixing point closer to the force application point of the chain body 20, thus optimizing the spatial layout of the tooling.

[0036] The locking pin 13 has an L-shaped bent structure, and the bend of the locking pin 13 faces the operating handle 11, which helps to prevent the chain body 20 from easily slipping outward from the locking pin 13 during operation.

[0037] The fixing hole is inclined, specifically, the axis of the fixing hole is inclined inward and away from the operating handle 11. When the locking pin 13 is installed on the pliers 12, the inclination of the locking pin 13 causes the roller 24 to move towards the acute angle between the pliers 12 and the locking pin 13, so as to improve the stability of the hook structure at one end of the chain body 20.

[0038] like Figure 6 As shown, the fixing hole can also be located on the outside of the jaw 12 (i.e., away from the clamping surfaces of the two jaws 12). Therefore, the locking pin 13 will also be installed on the outside of the jaw 12, which helps to reduce the distance between the two jaws 12 when clamped, and also facilitates installation. When the fixing hole is located on the outside of the jaw 12, the axis of the fixing hole is inclined inward and away from the operating handle 11, which also prevents the chain body 20 from slipping off the locking pin 13. At the same time, the bending direction of the locking pin 13 can be adjusted to face the outer link plate 21 or the inner link plate 22. In this installation state, the interception of the roller 24 by the locking pin 13 is changed to the interception of the outer link plate 21 or the inner link plate 22.

[0039] like Figure 2 , 3 As shown in Figures 4, 5, and 11, the second locking post 15 includes segments a151, b152, and c153 connected in sequence. Segment a151 is rotatably mounted on the outer sleeve 14. One end of segment b152 is connected to the top end of segment a151, and the other end of segment b152 is connected to the bottom end of segment c153. Segments a151 and c153 are parallel. The segmented structure of the second locking post 15 allows for selection of different positions on the second locking post 15 to contact the chain body 20, thereby tightening the chain body 20 to accommodate different sizes of stud contacts and effectively adjust the force application angle of the chain body 20, ensuring stable clamping.

[0040] The outer sleeve 14 is provided with an inner sleeve 141, and the segment a151 is inserted into the inner sleeve 141. Through the nesting and cooperation of the inner sleeve 141 and the outer sleeve 14, not only is the reliable rotation of the segment a151 realized, but also a stable support is provided for the rotation of the segment a151, avoiding the outward slippage of the segment a151 that would cause tooling failure.

[0041] The pliers head 12 is provided with a second fixing hole 121, into which the inner sleeve 141 can be inserted. The inner sleeve 141 cooperates with the second fixing hole 121 on the pliers head 12, which helps to improve the stability of the outer sleeve 14 on the pliers head 12.

[0042] The second fixing hole 121 is inclined in the axial direction, and is inclined towards the inside of the clamping head 12 and away from the clamping surfaces of the two clamping heads 12. The inclined fixing hole 121 allows the outer sleeve 14 and the second locking pin 15 to form a better working angle in use, thereby improving the locking force.

[0043] like Figures 7-11 As shown, in use, when corresponding to different sizes of Phillips head contacts, if the suitable length of the chain body 20 is too long or too short, and even tightening the gap between the two clamp heads 12 is insufficient, the connection method between the chain body 20 and the locking pin 2 15 can be changed to improve the adjustment of the chain body 20's tightening length. When the required adjustment distance is within the diameter of the roller 24, the locking pin 2 15 can be rotated so that segment c153 is between the two rollers 24; when the required adjustment distance exceeds the diameter of one roller 24, segment a151 can be inserted into the fixing hole 2 121 between the two rollers 24 to achieve the connection of the chain body 20. The axial distance α from the end of segment b152 closest to segment a151 to segment c153 is not greater than the diameter of one roller 24. This flexible design of two usage methods helps to improve the flexibility of adjusting the length of the chain body 20 when tightening, increasing the range of fine adjustment.

[0044] like Figure 4 , 5 As shown in Figure 11, preferably, segment b152 can be set to be perpendicular to segment a151.

[0045] The present invention describes a tool for replacing a sprite-shaped contact. A chain body is wound around the sprite-shaped contact, and a clamp body is used to tighten the chain body, causing the chain body and the sprite-shaped contact to fit together. By operating the clamp body to deflect, the pre-tension force of the sprite-shaped contact's tension spring is overcome, allowing the contact to open smoothly. Simultaneously, both ends of the chain body are connected to the clamp body via locking pin one and locking pin two, respectively. This tool combines the advantages of simple structure, safety, reliability, and strong adaptability.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tooling for replacing a Phillips head contact, comprising a pliers body (10), characterized in that, The two jaws (12) of the pliers body (10) are connected to a chain body (20); one end of the chain body (20) is hooked to one of the jaws (12) by a locking pin one (13), and the other end of the chain body (20) is hooked to the other jaw (12) by a locking pin two (15). The locking pin two (15) is installed on the jaw (12) by an outer sleeve (14).

2. The fixture for replacing the pentagonal contactor according to claim 1, characterized in that, The second locking pin (15) includes segments a (151), b (152) and c (153) connected in sequence. Segment a (151) is rotatably mounted on the outer sleeve (14). One end of segment b (152) is connected to the top of segment a (151), and the other end of segment b (152) is connected to the bottom of segment c (153). Segment a (151) and segment c (153) are parallel.

3. The tooling for replacing the plum blossom contact according to claim 2, characterized in that, The outer sleeve (14) is provided with an inner sleeve (141), and the segment a (151) is inserted into the inner sleeve (141).

4. The fixture for replacing the plum blossom contactor according to claim 3, characterized in that, The clamp head (12) is provided with a fixing hole two (121), and the inner sleeve (141) can be inserted into the fixing hole two (121).

5. The fixture for replacing the pentagonal contactor according to claim 4, characterized in that, The second fixing hole (121) is inclined in the axial direction.

6. A fixture for changing a perforated contact according to any one of claims 1 to 5, characterized in that, The locking pin (13) is located on the clamping side of the pliers (12).

7. The fixture for replacing the pentagonal contactor according to claim 6, characterized in that, The locking pin (13) is inserted into the pliers (12).

8. A tooling for changing a perforated contact according to any one of claims 1 to 5, characterized in that, The chain body (20) includes multiple interconnected chain link groups, each chain link group including two oppositely arranged outer chain link plates (21) and two oppositely arranged inner chain link plates (22). One end of each of the two outer chain link plates (21) is connected to two inner chain link plates (22) by a pin (23). The two inner chain link plates (22) are located inside the two outer chain link plates (21). Adjacent chain link groups are connected by a pin (23), and a roller (24) is sleeved on the pin (23).

9. A fixture for replacing a perforated contactor according to claim 8, characterized in that, The locking pin one (13) and locking pin two (15) are respectively inserted between two adjacent rollers (24).

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