Spring contact finger mounting tool for high-voltage contact seat

Abstract

The utility model relates to a spring contact finger mounting tool for a high-voltage contact seat, which comprises a top cover and a base which are opposite up and down, the base comprises a bottom plate and an outer cylinder and an inner cylinder which are fixedly connected on the bottom plate, the outer cylinder and the inner cylinder are coaxially arranged, and an assembling cavity for assembling the high-voltage contact seat and a plurality of groups of spring contact fingers is formed between the outer cylinder and the inner cylinder. And the top cover is used for pushing the multiple groups of spring contact fingers to synchronously move downwards. According to the utility model, the spring contact finger is placed in the slot of the high-voltage contact seat, and the movement track of the spring contact finger is limited through the inner cylinder body. And the spring contact finger is pushed by the top cover to move downwards along the outer wall of the inner cylinder body and is clamped with the high-voltage contact seat, so that the use is convenient. As the plurality of groups of spring contact fingers are uniformly distributed in the assembly cavity, the plurality of groups of spring contact fingers can be pushed to synchronously move through the top cover, so that the plurality of groups of spring contact fingers are clamped with the high-voltage contact seat at one time, the installation efficiency is improved, and the plurality of groups of spring contact fingers are uniformly stressed after being installed.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage circuit breaker technology, specifically to a spring contact finger mounting fixture for high-voltage contact seats. Background Technology

[0002] High-voltage circuit breakers typically connect and disconnect high-voltage main circuits by the contact and disconnection of contacts and contact bases in the arc-extinguishing chamber. To ensure tight contact and uniform force between the contacts and contact bases, multiple sets of spring contact fingers are usually installed in the contact bases to clamp the contacts.

[0003] Taking the high-voltage contact base in the common ZF16-550 switchgear as an example, such as Figure 2 As shown, 16 slots 21 are evenly distributed circumferentially inside the high-voltage contact 2. Figure 3 As shown, the spring contacts 1 are required in groups of four, and the 16 groups of spring contacts 1 are respectively assembled into 16 slots 21. The structure and assembly method of the spring contacts 1 are as follows. Figure 1 , 4 As shown, the spring contact 1 consists of a contact finger 11 and a butterfly spring 12. During assembly, the spring contact finger 1 is pressed into the slot 21 of the high-voltage contact seat 2, and the contact finger 11 changes from an inclined state to a vertical state, thereby compressing and deforming the butterfly spring 12. Then, the spring contact finger 1 is slid down along the inner wall of the high-voltage contact seat 2, so that the locking block 114 at the lower end of the spring contact finger 1 engages in the locking groove 22 of the high-voltage contact seat 2, thus completing the installation of the spring contact finger.

[0004] Currently, the assembly process for spring contacts 1 involves installing them one by one into the high-voltage contact base 2, and then fixing the assembled high-voltage contact base 2 to the mounting bracket of the combined electrical appliance. Because the disc spring is elastic, this method of assembling them one by one easily leads to uneven force distribution among the 16 sets of spring contacts, and the installation process is laborious and inefficient. To improve efficiency and simplify the assembly process, a spring contact mounting fixture for high-voltage contact bases is proposed. This fixture allows for the assembly of all 16 sets of spring contacts into the high-voltage contact base in a single operation, ensuring uniform force distribution among the installed spring contacts. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a spring contact finger mounting fixture for high-voltage contact seats.

[0006] This utility model is achieved through the following technical solution: a high-voltage contact seat spring contact finger mounting fixture, including an upper and lower opposite top cover and a base, the base including a base plate and an outer cylinder and an inner cylinder fixed to the base plate, the outer cylinder and the inner cylinder being coaxially arranged, forming an assembly cavity between the outer cylinder and the inner cylinder for assembling the high-voltage contact seat and multiple sets of spring contact fingers, the top cover being used to push the multiple sets of spring contact fingers to move downward synchronously.

[0007] As an optimization, the inner diameter of the outer cylinder is adapted to the outer diameter of the high-pressure contact seat.

[0008] As an optimization, a guide post is fixedly installed inside the inner cylinder, and a positioning hole adapted to the guide post is opened on the top cover, with the upper end of the guide post inserted into the positioning hole.

[0009] As an optimization, the upper end of the guide column is higher than the upper end of the inner cylinder.

[0010] As an optimization, the upper surface of the guide post is an arc surface.

[0011] As an optimization, the top cover includes a top plate and a limiting part fixed to the bottom of the top plate and in the shape of a frustum, the limiting part and the inner cylinder being coaxially arranged.

[0012] As an optimization, the outer diameter of the top plate is adapted to the inner diameter of the high-voltage contact seat.

[0013] As an optimization, the upper end of the inner cylinder is narrowed inward to form a frustum-shaped constricted section.

[0014] The beneficial effects of this invention are as follows: Because the inner diameter of the outer cylinder and the outer diameter of the high-pressure contact seat are matched, the high-pressure contact seat is locked and fixed within the assembly cavity. The spring contact finger is placed in the slot of the high-pressure contact seat, and the movement trajectory of the spring contact finger is limited by the inner cylinder. Under the push of the top cover, the spring contact finger moves downwards along the outer wall of the inner cylinder and engages with the high-pressure contact seat, making it convenient to use.

[0015] Because multiple sets of spring contacts are evenly distributed in the assembly cavity, the top cover can push the multiple sets of spring contacts to move synchronously, so that the multiple sets of spring contacts can engage with the high-voltage contact seat at one time, which improves the installation efficiency and ensures that the multiple sets of spring contacts are evenly stressed after installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the spring-loaded contact finger structure;

[0017] Figure 2 This is a schematic diagram of the high-voltage contactor structure;

[0018] Figure 3 A schematic diagram of the assembly of 16 sets of spring contact fingers inside the high-voltage contact seat;

[0019] Figure 4 A cross-sectional view of the spring contact finger and high-voltage contact seat assembly;

[0020] Figure 5 This is an initial assembly diagram for using this mounting fixture to assemble the spring contact finger and the high-voltage contact seat;

[0021] Figure 6 This is a schematic diagram showing the completed assembly of the spring contact finger and the high-voltage contact seat using this mounting fixture;

[0022] As shown in the figure:

[0023] 1. Spring contact finger; 11. Contact finger; 12. Butterfly spring; 111. Upper protrusion; 112. Middle protrusion; 113. Lower protrusion; 114. Locking block; 2. High-voltage contact seat; 21. Slot; 22. Slot; 3. Base; 31. Outer cylinder; 32. Inner cylinder; 321. Narrowing part; 33. Guide post; 34. Base plate; 4. Top cover; 41. Top plate; 42. Limiting part; 43. Positioning hole. Detailed Implementation

[0024] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0025] Both the high-voltage contact 2 and the spring contact finger 1 are existing components. The high-voltage contact 2 has a cylindrical structure, and the bottom end of the high-voltage contact 2 bends inward to form an annular groove 22. There are 16 protrusions evenly distributed along the circumference on the inner wall of the high-voltage contact 2, and slots 21 are formed between adjacent protrusions. Therefore, 16 sets of spring contact fingers 1 need to be installed in the high-voltage contact 2.

[0026] The spring contact finger 1 is composed of a contact finger 11 and a butterfly spring 12. The butterfly spring 12 is snapped and fixed on the rear side of the contact finger 11. The front side of the contact finger 11 has an upper protrusion 111, a middle protrusion 112 and a lower protrusion 113 protruding from top to bottom. Both the upper and lower ends of the contact finger 11 are provided with a locking block 114 that matches the locking groove 22.

[0027] During installation, the spring contacts 1 are required in groups of four, and a total of 16 groups of spring contacts 1 are prepared and placed in the 16 slots 21 of the high-voltage contact base 2. By pressing the spring contacts, the locking block 114 at the lower end of the spring contacts 2 is engaged in the locking groove 22 at the bottom of the high-voltage contact base 2, thus completing the assembly of the 16 groups of spring contacts and the high-voltage contact base.

[0028] However, the existing method of assembling spring contacts is to assemble them one by one in groups, which is laborious and prone to uneven force distribution. Therefore, this embodiment provides an installation fixture that can assemble 16 groups of spring contacts into the high-voltage contact base at one time, improving installation efficiency, ensuring uniform force distribution, and facilitating the subsequent installation and fixing of the high-voltage contact base and combined electrical appliances.

[0029] like Figures 1-6 As shown, a high-voltage contact seat spring finger mounting fixture includes a top cover 4 and a base 3 that are opposite each other. The base 3 includes a base plate 34 and an outer cylinder 31 and an inner cylinder 32 fixed to the base plate 34. The outer cylinder 31 and the inner cylinder 32 are coaxially arranged, and an assembly cavity for assembling a high-voltage contact seat 2 and multiple sets of spring fingers 1 is formed between the outer cylinder 31 and the inner cylinder 32. The top cover 4 is used to push the multiple sets of spring fingers 1 to move downward synchronously.

[0030] Specifically, the inner diameter of the outer cylinder 31 is adapted to the outer diameter of the high-voltage contact 2. The high-voltage contact 2 is positioned by the outer cylinder 31, making the high-voltage contact 2 and the inner cylinder 32 coaxial.

[0031] Specifically, the distance between the outer cylinder 31 and the inner cylinder 32 is equal to the sum of the wall thickness of the high-voltage contact 2 and the maximum front-to-back width of the spring contact finger 1. Thus, when the spring contact finger 1 is placed in the slot 21 of the high-voltage contact 2, the inner cylinder 32 limits the movement trajectory of the spring contact finger 1, allowing the spring contact finger 1 to move downward along the outer wall of the inner cylinder 32, thereby causing the locking block 114 at the lower end of the spring contact finger 1 to engage in the locking groove 22 of the high-voltage contact 2.

[0032] Specifically, the height of the inner cylinder 32 is greater than half the length of the spring contact finger 1. That is, when the locking block 114 of the spring contact finger 1 engages with the locking groove 22 of the high-voltage contact seat 2, the upper end of the inner cylinder 32 is higher than the height 112 of the middle protrusion of the spring contact finger 1. This allows the inner cylinder 32 to provide limiting support for the two protruding points of the spring contact finger 1, the middle protrusion 112 and the lower protrusion 113, ensuring the stable downward movement of the spring contact finger. As the spring contact finger moves downward, the middle protrusion 112 and the lower protrusion 113 of the spring contact finger 1 press against the outer wall of the inner cylinder 32, causing the disc spring 12 of the spring contact finger 1 to compress and deform.

[0033] To allow the spring contact finger 1 to slide smoothly downwards along the outer wall of the inner cylinder 32, the upper end of the inner cylinder 32 is tapered inwards to form a frustum-shaped constriction 321. In this embodiment, the inner cylinder 32 and the constriction 321 are integrally formed. Furthermore, the height of the upper end of the constriction 321 is lower than the height of the upper protrusion 111 of the spring contact finger 1.

[0034] Specifically, the top cover 4 includes a circular top plate 41 and a frustum-shaped limiting part 42 fixed to the bottom of the top plate 41. The limiting part 42 and the inner cylinder 32 are coaxially arranged. The outer diameter of the top plate 41 is adapted to the inner diameter of the high-pressure contact seat 2. This allows the top plate 41 to push multiple sets of spring contact fingers 1 evenly distributed in the high-pressure contact seat 2 to move downward synchronously, so that the spring contact fingers 1 are subjected to uniform force.

[0035] The limiting part 42 is used to limit and support the upper protrusion 111 of the spring contact finger 1. As the spring contact finger 1 moves downward, its upper protrusion 111 fits tightly against the outer wall of the limiting part 42.

[0036] To ensure that the top cover 4 remains coaxial with the inner cylinder 32 when the spring contact finger is pressed, a guide post 33 is fixed inside the inner cylinder 32. The top cover 4 has a positioning hole 43 that matches the guide post 33, and the upper end of the guide post 33 is inserted into the positioning hole 43. The height of the guide post 33 is higher than the height of the inner cylinder 32. In this embodiment, the guide post 33 is fixed to the base plate 34 and coaxially arranged with the inner cylinder 32.

[0037] To facilitate the insertion of the guide post 33 into the positioning hole 43, the upper end surface of the guide post 33 is an arc surface.

[0038] In this embodiment, the up-and-down movement of the top cover 4 can be driven by manual pressing or by a linear drive mechanism, such as a telescopic cylinder or a nut and screw pair, etc. There is no specific limitation here, as long as it can drive the top cover 4 to move up and down.

[0039] Instructions for use: First, place the high-voltage contact 2 in the assembly cavity. Prepare sixteen sets of four spring contacts 1. Then, place the sixteen sets of spring contacts 1 into the sixteen slots 21 of the high-voltage contact 2, ensuring that the lower protrusion 113 of the spring contacts 1 is in contact with the outer wall of the inner cylinder 32.

[0040] Then, the top cover 4 is pressed onto the upper end of the 16 sets of spring contact fingers 1, so that the upper protrusion 11 of the spring contact fingers 1 fits against the outer wall of the limiting part 42 of the top cover 4. The top cover 4 is driven to move downward, and the top plate 41 of the top cover 4 pushes the 16 sets of spring contact fingers 1 to slide downward synchronously. As the spring contact fingers 1 move downward, the middle protrusion 112 of the spring contact fingers 1 also presses against the outer wall of the inner cylinder 32. When the locking block 114 at the lower end of the spring contact fingers 1 engages with the locking groove 22 of the high-voltage contact seat 2, the top cover 4 stops moving. At this time, the limiting support of the middle protrusion 112 and the lower protrusion 113 of the spring contact fingers 1 by the inner cylinder 32 makes the spring contact fingers 1 stably fixed between the inner cylinder 32 and the high-voltage contact seat 2. The one-time assembly of the 16 sets of spring contact fingers is realized.

[0041] Finally, the high-voltage contact 2 can be installed with the combined electrical appliance using this installation fixture. After the spring contact finger 1 is assembled, remove the top cover 4, and then fix the high-voltage contact 2 with the mounting base of the combined electrical appliance. At this time, the mounting base of the combined electrical appliance can engage and support the locking block 114 at the upper end of the spring contact finger 1. Finally, remove the base 3 to complete the installation and fixing of the high-voltage contact 2 with the combined electrical appliance, making it more convenient to use.

[0042] Of course, the above description is not limited to the examples above. Technical features not described in this utility model can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A fixture for mounting spring contact fingers on a high-voltage contact seat, characterized in that: It includes a top cover (4) and a base (3) that are opposite each other. The base (3) includes a base plate (34) and an outer cylinder (31) and an inner cylinder (32) fixed on the base plate (34). The outer cylinder and the inner cylinder are coaxially arranged. An assembly cavity for assembling a high-pressure contact seat (2) and multiple sets of spring contact fingers (1) is formed between the outer cylinder (31) and the inner cylinder (32). The top cover (4) is used to push the multiple sets of spring contact fingers (1) to move downward synchronously.

2. The spring contact finger mounting fixture for a high-voltage contact seat according to claim 1, characterized in that: The inner diameter of the outer cylinder (31) is adapted to the outer diameter of the high-pressure contact (2).

3. The spring contact finger mounting fixture for a high-voltage contact seat according to claim 1, characterized in that: The inner cylinder (32) is fixedly provided with a guide post (33), and the top cover (4) is provided with a positioning hole (43) that is adapted to the guide post (33), with the upper end of the guide post inserted into the positioning hole.

4. The spring contact finger mounting fixture for a high-voltage contact seat according to claim 3, characterized in that: The height of the guide column (33) is higher than the height of the inner cylinder (32).

5. A spring contact finger mounting fixture for a high-voltage contact seat according to any one of claims 3 or 4, characterized in that: The upper surface of the guide post (33) is an arc surface.

6. The spring contact finger mounting fixture for a high-voltage contact seat according to claim 1, characterized in that: The top cover (4) includes a circular top plate (41) and a limiting part (42) fixed at the bottom of the top plate (41) and in the shape of a frustum. The top cover and the inner cylinder are coaxially arranged.

7. The spring contact finger mounting fixture for a high-voltage contact seat according to claim 6, characterized in that: The outer diameter of the top plate (41) is adapted to the inner diameter of the high-pressure contact seat (2).

8. The spring contact finger mounting fixture for a high-voltage contact seat according to claim 1, characterized in that: The upper end of the inner cylinder (32) contracts inward to form a frustum-shaped constricted portion (321).

Images