Work fixture for vacuum arc-extinguishing chamber

Abstract

The utility model provides a work fixture used for a vacuum arc-extinguishing chamber. The work fixture comprises a pedestal; the first supporting assembly is fixed at one end of the base, and the first supporting assembly is used for bearing a static contact rod of the vacuum arc-extinguishing chamber; and the second supporting assembly is fixed at the other end of the base, the second supporting assembly is used for bearing a moving contact rod of the vacuum arc-extinguishing chamber, and the second supporting assembly can drive the moving contact rod to move between a switching-off position far away from the static contact blade and a switching-on position in contact with the static contact blade. Therefore, whether the assembly deviation of the vacuum arc-extinguishing chamber is too large or not can be known without manual measurement, which is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the testing field of vacuum interrupters, and in particular to tooling fixtures for vacuum interrupters. Background Technology

[0002] Vacuum interrupters (vacuum switch tubes) are core components of medium and high voltage power switches. Their main function is to quickly extinguish the arc and suppress current after the power supply to a medium or high voltage circuit is cut off, thanks to their excellent internal insulation, thus preventing accidents and unforeseen events.

[0003] A vacuum interrupter typically includes a housing, a stationary contact end, and a moving contact end. The stationary contact end includes a stationary contact rod and a stationary contact plate, with the plate fixed to the first end of the rod. The moving contact end includes a moving contact rod and a moving contact plate, with the plate fixed to the first end of the rod. Both the stationary and moving contact plates are located within the housing and are positioned opposite each other. The moving contact plate can contact or move away from the stationary contact plate under the influence of the moving contact rod. The position where the moving contact plate contacts the stationary contact plate is the closed position, and the position where it moves away from the stationary contact plate is the open position.

[0004] To ensure the reliability of the vacuum interrupter's performance, its assembly requires high precision. Utility Model Content

[0005] In view of this, the present invention proposes a tooling fixture for a vacuum interrupter, wherein the vacuum interrupter includes a shell, a stationary contact end, and a moving contact end. The stationary contact end includes a stationary contact rod and a stationary contact plate, the stationary contact plate being fixed to the first end of the stationary contact rod. The moving contact end includes a moving contact rod and a moving contact plate, the moving contact plate being fixed to the first end of the moving contact rod. Both the stationary contact plate and the moving contact plate are located within the shell, and the stationary contact plate and the moving contact plate are arranged opposite to each other. The moving contact plate can contact or move away from the stationary contact plate under the action of the moving contact rod. The tooling fixture includes:

[0006] Base;

[0007] A first support assembly is fixed to one end of the base, and the first support assembly is used to support the stationary contact bar of the vacuum interrupter.

[0008] The second support assembly is fixed to the other end of the base. The second support assembly is used to support the moving contact bar of the vacuum interrupter. The second support assembly can drive the moving contact bar to move between the open position away from the stationary contact piece and the closed position in contact with the stationary contact piece.

[0009] By setting a first support assembly for supporting the stationary contact bar and a second support assembly for supporting the moving contact bar, the assembly of the two contact bars is compliant when they can be placed on them. This eliminates the need for manual measurement, allowing for quick and easy identification of whether the assembly deviation of the vacuum interrupter is too large.

[0010] Optionally, according to the tooling fixture described above, the first support assembly includes: a first support base having a first mating portion for supporting the stationary contact bar, at least a portion of the first mating portion being attached to a second end of the stationary contact bar.

[0011] Optionally, according to the tooling fixture described above, the first support assembly further includes:

[0012] A rod-shaped body, which passes through the first support base;

[0013] A contact plate is located in the first support and fixed to the rod-shaped body. The rod-shaped body can drive the contact plate to move. The contact plate is used to abut against the end of the stationary contact bar.

[0014] This allows for the positioning of the stationary contact bar. Positioning the stationary contact bar facilitates determining the closing position.

[0015] Optionally, according to the tooling fixture described above, the rod-shaped body is screwed to the contact plate, and rotation of the rod-shaped body can drive the contact plate to move away from or towards the second support assembly; or

[0016] The first support assembly further includes a spring, which is sleeved on the rod-shaped body. The rod-shaped body is telescopic, and the spring is capable of applying a thrust to the contact plate away from the second support assembly.

[0017] This implementation method is relatively simple and low-cost.

[0018] Optionally, according to the tooling fixture described above, the second support assembly includes:

[0019] The second support is fixed to the base;

[0020] A screw-in component, which can be screwed into the screw hole of the moving contact bar and drive the moving contact bar to move from the closed position to the open position;

[0021] A sleeve is fixed to the second support base and has a positioning hole, the second end of the moving contact rod being able to be placed in the positioning hole.

[0022] Optionally, according to the tooling fixture described above, the sleeve further has a protrusion for abutting against the housing of the vacuum interrupter; or

[0023] The tooling fixture also includes a spacing tube, which is used to sleeve the part of the moving contact rod located outside the housing. One end of the spacing tube is used to abut against the sleeve, and the other end is used to abut against the housing of the vacuum interrupter.

[0024] Optionally, according to the tooling fixture described above, the shape of the positioning hole matches the second end of the moving contact bar. This allows for effective fixation of the moving contact bar, thereby ensuring proper positioning of the vacuum interrupter.

[0025] Optionally, the second support assembly can be movably fixed to the base, according to the tooling fixture described above. This allows it to be adapted to vacuum interrupters of different lengths.

[0026] Optionally, according to the tooling fixture described above, the second support assembly has an elongated hole, the base has a through hole, and the second fixing member passes through the elongated hole and the through hole to fix the second support assembly to the base. This allows the position of the second support assembly to be adjusted by moving the second fixing member, a simple and easy-to-implement method with low cost.

[0027] Optionally, the base of the tooling fixture described above is an insulating component. Using an insulating component makes the overall weight of the tooling fixture lighter and easier to handle. Attached Figure Description

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention, in which:

[0029] Figure 1 This is a schematic diagram of a tooling fixture for a vacuum interrupter according to an embodiment of the present invention.

[0030] Figure 2 for Figure 1 An explosion diagram.

[0031] Figure 3 for Figure 1 A partial structural diagram.

[0032] Figure 4 This is a schematic diagram of the vacuum interrupter in the open position.

[0033] Figure 5 This is a schematic diagram of the structure for fixing the sleeve to the second support.

[0034] The reference numerals in the attached figures are as follows:

[0035] 11-Shell

[0036] 121-Static Contact Rod

[0037] 1211-Arc

[0038] 1212-Straight line segment

[0039] 122-Stationary contact head plate

[0040] 131-Moving contact rod

[0041] 1312-Screw Hole

[0042] 132-Moving contact plate

[0043] 2-Base

[0044] 21-Positioning component

[0045] 22-Through Hole

[0046] 31-First Support

[0047] 311-First Matching Section

[0048] 312-First Groove

[0049] 32-rod

[0050] 33-Contact Plate

[0051] 34-Spring

[0052] 41-Second Support

[0053] 411-Elongated Hole

[0054] 412-Second Groove

[0055] 42-Screw connector

[0056] 43-Casing

[0057] 431-Protrusion

[0058] 432-Chassis

[0059] 433-Columnar body

[0060] 4331-Positioning Surface

[0061] 434-Positioning Hole

[0062] 44-pitch tube

[0063] 51-First fastener

[0064] 52-Second fastener

[0065] A-Milling flat surface

[0066] B-Milling flat surface Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this utility model clearer, the following embodiments are provided to further illustrate this utility model in detail. The nouns and pronouns referring to "person" in this patent application are not limited to specific genders.

[0068] There are at least two requirements for the stationary and moving contact ends of a vacuum interrupter: First, the stationary and moving contact pieces should overlap as much as possible when they are in contact; second, the stationary and moving contact pieces should be able to open to the correct position, that is, the distance between the stationary and moving contact pieces should reach a preset value. Here, the distance between the stationary and moving contact pieces when they are open to the correct position is called the "opening distance".

[0069] like Figure 4 As shown, the vacuum interrupter includes a housing 11, a stationary contact end, and a moving contact end. The stationary contact end includes a stationary contact rod 121 and a stationary contact piece 122. The stationary contact piece 122 is fixed to the first end of the stationary contact rod 121. The moving contact end includes a moving contact rod 131 and a moving contact piece 132. The moving contact piece 132 is fixed to the first end of the moving contact rod 131. Both the stationary contact piece 122 and the moving contact piece 132 are located in the housing 11, and the stationary contact piece 122 and the moving contact piece 132 are arranged opposite to each other. The moving contact piece 132 can contact or move away from the stationary contact piece 122 under the action of the moving contact rod 131 to reach the closed position or the open position.

[0070] like Figures 1 to 4 As shown, this utility model provides a tooling fixture for a vacuum interrupter, which includes a base 2, a first support assembly, and a second support assembly.

[0071] The upper surface of base 2 can be flat, facilitating the assembly of other components. The material of base 2 can be insulation, such as phenolic cotton laminate. Using insulation makes the overall weight of the fixture lighter and easier to handle. Furthermore, the bottom of base 2 can be wedge-shaped to adapt to other systems. Base 2 can also be equipped with a positioning element 21 for fixing it to other systems for further testing; details will not be elaborated here.

[0072] The first support assembly is fixed to one end of the base 2, and this first support assembly is used to support the stationary contact rod 121 of the vacuum interrupter. That is, the stationary contact rod 121 of the vacuum interrupter can be placed on the first support assembly. The first support assembly can be fixed to the base 2 by the first fastener 51.

[0073] The second support assembly is fixed to the other end of the base 2. This second support assembly supports the moving contact rod 131 of the vacuum interrupter. The second support assembly can move the moving contact rod 131 between the open position away from the stationary contact plate 122 and the closed position in contact with the stationary contact plate 122. The moving contact rod 131 of the vacuum interrupter can be placed on the second support assembly. The second support assembly and the first support assembly are arranged opposite to each other on the base 2. The second support assembly can move the moving contact rod 131 between the open position and the closed position. In this way, it is possible to detect whether the opening distance of the vacuum interrupter meets the requirements. For example, the second support assembly is provided with a limit structure, which can fix the open and closed positions of the vacuum interrupter. Alternatively, the second support assembly is provided with a graduated component, so that the operator can know the moving distance of the moving contact rod 131 to ensure that the opening distance of the second vacuum interrupter meets the requirements. Other methods can also be used, which will not be described in detail here. The second support assembly can be fixed to the base 2 by the second fixing member 52.

[0074] When the assembly of the stationary and moving contact ends of the vacuum interrupter meets the requirements, the stationary contact rod 121 can be placed on the first support assembly, and the moving contact rod 131 can be placed on the second support assembly. This indicates that the installation positions of the stationary contact rod 121 and the moving contact rod 131 meet the requirements. Consequently, the stationary contact piece 122 fixed to the stationary contact rod 121 and the moving contact piece 132 fixed to the moving contact rod 131 can fit together within the process requirements, avoiding significant deviations in their positions. For example, if the axes of the stationary contact rod 121 and the moving contact rod 131 need to overlap, then when setting the positions of the first and second support assemblies, it is necessary to ensure that the stationary contact rod 121 is completely placed on the first support assembly, and the moving contact rod 131 is also completely placed on the second support assembly. If one contact rod is placed on the corresponding support assembly, but the other contact rod cannot fit onto the other support assembly, it indicates that the axes of the two contact rods do not overlap, and the installation deviation of the vacuum interrupter is too large; or, if... Figure 3 As shown, the second end of the stationary contact rod 121 has a milled flat surface A, which can also be two milled flat surfaces A with the axis of the stationary contact rod 121 as the line of symmetry. Similarly, the second end of the moving contact rod 131 has a milled flat surface B, which can specifically be two milled flat surfaces B with the axis of the moving contact rod 131 as the line of symmetry. The milled flat surfaces A and B should theoretically be parallel, but in practice, there may be angular deviations due to process issues. Therefore, as long as the process deviation is within the required range, the second end of the stationary contact rod 121 can be placed on the first support assembly, and the second end of the moving contact rod 131 can be placed on the second support assembly.

[0075] In this invention, by setting a first support component for supporting the stationary contact rod 121 and a second support component for supporting the moving contact rod 131, the assembly of the two contact rods is in compliance with requirements when they can be placed on them. This eliminates the need for manual measurement and allows for quick and convenient identification of whether the assembly deviation of the vacuum interrupter is too large.

[0076] Optionally, such as Figure 1 , Figure 3 and Figure 4 As shown, the first support assembly includes a first support base 31 having a first mating portion 311 for supporting a stationary contact rod 121. At least a portion of the first mating portion 311 abuts against the second end of the stationary contact rod 121. The first support base 31 may have a first groove 312, a portion of the edge of which forms the first mating portion 311. Figure 3 As shown, the second end of the stationary contact rod 121 has a milled flat surface A. Thus, the cross-section of the second end of the stationary contact rod 121 is formed by two circular arcs 1211 and two straight line segments 1212. The first matching portion 311 includes two long sides that can completely fit against the sides of the two straight line segments 1212 of the stationary contact rod 121, thereby defining the placement position of the stationary contact rod 121. Furthermore, the first matching portion 311 can also provide full support to the stationary contact rod 121; that is, the edge of the first groove 312 is higher than the interior of the first groove 312, so the stationary contact rod 121 is supported by the first matching portion 311.

[0077] As an example, such as Figure 1 As shown, the first support assembly also includes a rod-shaped body 32 and a contact plate 33. The rod-shaped body 32 passes through the first support base 31, and the contact plate 33 is located in the first support base 31 and fixed to the rod-shaped body 32. The rod-shaped body 32 can drive the contact plate 33 to move. The contact plate 33 is used to abut against the end of the stationary contact rod 121, thus positioning the stationary contact rod 121. The positioning of the stationary contact rod 121 is beneficial for positioning the closing position.

[0078] As a more specific example, the rod-shaped body 32 passes through the side wall of the first groove 312 away from the second support assembly.

[0079] As an example, the rod-shaped body 32 is screwed onto the contact plate 33. Rotation of the rod-shaped body 32 can cause the contact plate 33 to move away from or towards the second support assembly; that is, rotation of the rod-shaped body 32 can cause the contact plate 33 to move linearly. This implementation is relatively simple and low-cost. Alternatively, the first support assembly may also include a spring 34, which is sleeved on the rod-shaped body 32. The rod-shaped body 32 is telescopic, and the spring 34 can apply a pushing force to the contact plate 33 away from the second support assembly. Thus, under the action of the spring 34, the contact plate 33 will be positioned away from the end of the stationary contact rod 121, without hindering the insertion of the stationary contact rod 121 into the first support assembly. This implementation is simple to operate. Subsequently, other components can be used to push the rod-shaped body 32 to apply a pushing force towards the second support assembly, causing the contact plate 33 to abut against the end of the stationary contact rod 121.

[0080] As an example, the second support assembly includes a second support base 41, a screw connector 42, and a sleeve 43. The second support base 41 is fixed to the base 2. For instance, the second support base 41 can be an L-shaped metal plate, formed by two connected plate-like bodies at approximately a 90-degree angle. One plate-like body is fixed to the base 2, and the other plate-like body supports the sleeve 43. The screw connector 42 can be a screw or a bolt. The end of the moving contact rod 131 away from the stationary contact has a screw hole. The screw connector 42 can be screwed into the screw hole 1312 of the moving contact rod 131 to fix it to the moving contact rod 131. The screw connector 42 can rotate to drive the moving contact rod 131 to move linearly in a direction away from the stationary contact. The specific rotation length can be determined by the scale on the screw connector 42, or by the number of rotations. The distance the moving contact rod 131 moves can also be determined by the limiting part. The specific distance can be limited according to actual needs. Of course, after the screw connector 42 is fixed to the moving contact rod 131, the screw connector 42 can be pulled directly to move the moving contact rod 131. The distance of movement can be determined by the limiting part, which will not be elaborated further. The sleeve 43 can be fixed to the second support 41, and the sleeve 43 has a positioning hole 434, in which the second end of the moving contact rod 131 can be placed. As an example, such as... Figure 2 and Figure 3As shown, the sleeve 43 includes a base and a columnar body 433 located in the middle of the base 432. A positioning hole 434 is provided at the center of the base 432 and the center of the columnar body 433. The columnar body 433 is fixed in the second groove 412 of the second support base 41 by embedding. The second end of the moving contact rod 131 can be placed in the positioning hole 434, so that the screw connector 42 can be inserted into the positioning hole 434 and fixed to the second end of the moving contact rod 131. In addition, the columnar body 433 can also limit the movement of the moving contact rod 131.

[0081] As an example, the sleeve 43 also has a protrusion 431. For example... Figure 2 and Figure 3 As shown, there are two protrusions 431, symmetrically distributed on both sides of the positioning hole 434. These protrusions 431 abut against the housing 11 of the vacuum interrupter, preventing the housing 11 from moving. However, the height of the protrusions 431 cannot be too high, otherwise there will be deviation when abutting against the vacuum interrupter. Therefore, the tooling fixture may also include a spacing tube 44, which is sleeved on the portion of the moving contact rod 131 located outside the housing 11. One end of the spacing tube 44 abuts against the sleeve 43, and the other end abuts against the housing 11 of the vacuum interrupter, thus enabling the vacuum interrupter to be positioned for subsequent adjustment of the opening distance. The spacing tube 44 can be made of insulating material, which reduces costs and facilitates installation.

[0082] As an example, the shape of the positioning hole 434 matches the second end of the moving contact bar 131. Figure 3 As shown, this allows for proper fixation of the moving contact bar 131, thereby ensuring good positioning of the vacuum interrupter. More specifically, the shape of the positioning hole 434 matches the moving contact bar 131 with its milled flat surface B. If the moving contact bar 131 cannot be inserted into the positioning hole 434, or if the stationary contact bar 121 cannot be placed on the first support assembly even when the moving contact bar 131 is inserted into the positioning hole 434, then there will be a significant process deviation.

[0083] In addition, such as Figure 3 and Figure 5As shown, the cylindrical body 433 of the sleeve 43 has positioning surfaces 4331 on both sides. These positioning surfaces 4331 match the shape of the groove 412, meaning the cylindrical body 433 can be inserted into the groove 412. The two positioning surfaces 4331 increase the contact area with the groove 412, thus fixing it in the groove 412. The contact between the two positioning surfaces 4331 and the sidewall of the groove 412, and the contact between the cylindrical body 433 and the bottom of the groove 412, form positioning, thus fixing the cylindrical body 433 in the groove 412. After the stationary contact rod 121 is placed on the first support assembly, if the cylindrical body 433 cannot be inserted into the groove 412 after the sleeve 43 is fitted onto the moving contact rod 131, it indicates that the assembly of the vacuum interrupter is not up to standard.

[0084] As an example, the second support assembly is movably fixed to the base 2, thus adapting to vacuum interrupters of different lengths. There are many ways to movably fix the second support assembly to the base 2. For example, the second support assembly has an elongated hole 411; specifically, the second support base 41 has an elongated hole 411, and the base 2 has a through hole 22. The second fixing member 52 passes through the elongated hole 411 and the through hole 22 to fix the second support assembly to the base 2. Thus, the position of the second support assembly can be adjusted by moving the second fixing member 52. This method is simple, easy to implement, and low in cost.

[0085] The following specific examples illustrate the working method of the tooling fixture used in vacuum interrupters.

[0086] The vacuum interrupter is in the closed state, meaning the stationary contact 122 and the moving contact 132 are pressed together. A spacing tube 44 matching the specifications of the vacuum interrupter is used. The spacing tube 44 is fitted onto the moving contact rod 131 of the vacuum interrupter. Then, the vacuum interrupter is placed on the first support assembly and the second support assembly. If both can be placed, the assembly of the vacuum interrupter meets the requirements. Specifically, during the process of placing the vacuum interrupter on the tooling fixture, the spacing tube 44 can be first fitted onto the moving contact rod 131, and the second end of the moving contact rod 131 can be inserted into the positioning hole 434 in the sleeve 43. Then, the sleeve 43 is embedded into the second groove 412 of the second support 41, with the spacing tube 44 pressed against the sleeve 43 and the housing 11 of the vacuum interrupter. In this way, one end of the moving contact is positioned. Then, try placing the stationary contact bar 121 on the first mating part 311 of the first support base 31. If it can be placed in, it means that the assembly of the vacuum interrupter meets the requirements; if it cannot, it means that the assembly of the vacuum interrupter does not meet the requirements. Alternatively, you can first place the stationary contact bar 121 on the first mating part 311 of the first support base 32, and then try to insert the sleeve 43 into the second groove 412 of the second support base 41. Since the dimensions of the two positioning surfaces 4331 and the groove 412 are matched, if it can be inserted and fixed in the groove 412, it means that the assembly of the vacuum interrupter meets the requirements.

[0087] Assuming the assembly of the vacuum interrupter meets the requirements, the rod-shaped body 32 pushes the contact plate 33 against the stationary contact rod 121 under the action of external force. In this way, the shell 11 of the vacuum interrupter in the closed state is positioned by the sleeve 43, and the stationary contact rod 121 is positioned by the contact plate 33, thus fixing the entire vacuum interrupter.

[0088] The screw connector 42 is screwed into the screw hole of the moving contact bar 131. As the screw connector 42 rotates, it can move the moving contact bar 131 away from the first support assembly until it reaches a position within the cylindrical body of the sleeve 43 where it can no longer move. This distance is the opening distance. Figure 4 As shown, the distance H1 that the moving contact bar 131 moves is the opening distance H2. Next, this fixture can be placed on other testing systems to further test whether the opening distance meets the requirements, that is, to determine whether the vacuum degree of the vacuum interrupter is qualified.

[0089] If the test is passed completely, the vacuum degree and position of the vacuum interrupter are qualified. Otherwise, further dimensional measurements are required for the position, such as using a coordinate measuring machine, which will not be elaborated here.

[0090] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tooling fixture for a vacuum interrupter, the vacuum interrupter comprising a housing (11), a stationary contact end and a movable contact end, the stationary contact end comprising a stationary contact rod (121) and a stationary contact blade (122), the stationary contact blade (122) being fixed to a first end of the stationary contact rod (121), the movable contact end comprising a movable contact rod (131) and a movable contact blade (132), the movable contact blade (132) being fixed to a first end of the movable contact rod (131), the stationary contact blade (122) and the movable contact blade (132) being located in the housing (11) and the stationary contact blade (122) being oppositely arranged to the movable contact blade (132), the movable contact blade (132) being capable of contacting or moving away from the stationary contact blade (122) under the drive of the movable contact rod (131); characterized in that the tooling fixture comprising: a base (2); a first support assembly fixed to one end of the base (2), the first support assembly being used for bearing the stationary contact rod (121) of the vacuum interrupter; a second support assembly fixed to the other end of the base (2), the second support assembly being used for bearing the movable contact rod (131) of the vacuum interrupter, the second support assembly being capable of driving the movable contact rod (131) to move between a position away from the stationary contact blade (122) and a position contacting the stationary contact blade (122).

2. The tooling fixture of claim 1, wherein, the first support assembly comprising: a first support seat (31) having a first matching part (311) for supporting the stationary contact rod (121), at least a part of the first matching part (311) being fitted to a second end of the stationary contact rod (121).

3. The tooling fixture of claim 2, wherein, the first support assembly further comprising: a rod-shaped body (32) penetrating the first support seat (31); a contact disc (33) located in the first support seat (31) and fixed to the rod-shaped body (32), the rod-shaped body (32) being capable of driving the contact disc (33) to move, the contact disc (33) being used for abutting against an end of the stationary contact rod (121).

4. The tooling fixture of claim 3, wherein, the rod-shaped body (32) being screwed to the contact disc (33), rotation of the rod-shaped body (32) being capable of driving the contact disc (33) to move in a direction away from or towards the second support assembly; or the first support assembly further comprising a spring (34) sleeved on the rod-shaped body (32), the rod-shaped body (32) being telescopic, the spring (34) being capable of exerting a pushing force on the contact disc (33) away from the second support assembly.

5. The tooling fixture of claim 1, wherein, the second support assembly comprising: a second support seat (41) fixed to the base (2); a screwing member (42) capable of being screwed into a screw hole (1312) of the movable contact rod (131) and driving the movable contact rod (131) to move from the closed position to the open position. A sleeve (43) is capable of being fixed to the second support base (41), and the sleeve (43) has a positioning hole (434), and the second end of the movable contact rod (131) is capable of being placed in the positioning hole (434).

6. The tooling fixture of claim 5, wherein, The sleeve (43) further has a protruding part (431) for abutting against the shell (11) of the vacuum interrupter. The tool clamp further comprises a spacing tube (44) for being sleeved on the part of the movable contact rod (131) located outside the shell (11), one end of the spacing tube (44) is used for abutting against the sleeve (43), and the other end is used for abutting against the shell (11) of the vacuum interrupter.

7. The tooling fixture of claim 5, wherein, The shape of the positioning hole (434) is matched with the second end of the movable contact rod (131).

8. The tooling fixture of any one of claims 1-7, wherein, The second support assembly is movably fixed to the base (2).

9. The tooling fixture of claim 8, wherein, The second support assembly has an elongated hole (411), the base (2) has a through hole (22), and a second fixing member (52) is threaded through the elongated hole (411) and the through hole (22) so that the second support assembly is fixed to the base (2).

10. The tooling fixture of any one of claims 1-7, wherein, The base (2) is an insulating member.

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