Semi-automatic tool for assembling over-travel spring assembly of arc extinguish chamber

Abstract

The utility model discloses a semi-automatic tool for assembling an over-travel spring assembly of an arc extinguish chamber, which comprises a support frame, a driving mechanism arranged on the support frame, a sliding trolley used for supporting the vacuum arc extinguish chamber and the over-travel spring assembly of the vacuum arc extinguish chamber, and a baffle plate, the baffle is arranged in front of the sliding trolley and is opposite to the over-travel spring assembly, and the driving mechanism drives the sliding trolley to drive the vacuum arc-extinguishing chamber and the over-travel spring assembly to move forwards, so that the vacuum arc-extinguishing chamber and the over-travel spring assembly are jacked by the baffle until the over-travel spring is pre-pressed to set a travel and automatically stops, and then positioning is carried out, and assembling is completed. By controlling the driving mechanism, inching force applying, inching force removing, multi-limiting design and horizontal layout can be combined, under the condition that external force is not released, the over-travel spring assembly can be adjusted to be in an ideal assembly state, the two hands are liberated, one person and one machine can easily and efficiently complete assembly with high precision, and safety and convenience are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum circuit breaker technology, and in particular relates to a semi-automatic tooling for assembling an arc-extinguishing chamber overtravel spring assembly. Background Technology

[0002] As the main arc-extinguishing element in switchgear and control equipment, the quality of vacuum circuit breakers directly determines the overall quality of the product. To ensure high-quality and reliable products and avoid disputes related to maintenance and after-sales service, the State Grid Corporation of China requires all successful bidders to have the capability to independently manufacture circuit breakers.

[0003] Vacuum interrupters are favored in circuit breaker switch design due to their excellent arc-extinguishing performance in a vacuum environment. To reduce contact resistance and ensure the pressure when the moving and stationary contacts of the vacuum interrupter are in contact, the design of the overtravel spring assembly at the moving conductive end of the vacuum interrupter is an essential part, and its assembly precision, assembly quality, assembly operability, and safety requirements are extremely high.

[0004] Existing assembly schemes for vacuum interrupter overtravel spring assemblies generally involve vertically fixing the vacuum interrupter and overtravel spring assembly onto an assembly fixture in a specific installation sequence. Then, using manual fixtures or auxiliary pressure equipment such as a spring press, the spring pressure (approximately 1600-2000N) is overcome to pre-compress the overtravel spring for a certain stroke before locking it in the overtravel spring seat. A limiting pin is then inserted, completing the initial assembly. However, this assembly process has the following drawbacks:

[0005] (1) Installation using manual tools or auxiliary pressure equipment such as spring presses is time-consuming and labor-intensive, requiring multiple people to work together.

[0006] (2) The pre-compression process requires continuous adjustment of the pre-compression stroke and fitting angle to achieve the ideal assembly state before locking can be performed, resulting in very low installation efficiency.

[0007] (3) Vertical installation has no limit on the number of positions, the components are easy to fall apart, the installation accuracy is difficult to guarantee, and it is difficult to adjust when under preload.

[0008] (4) Preloaded overtravel springs are prone to popping out, causing injury to people and equipment. Utility Model Content

[0009] The purpose of this utility model is to provide a semi-automatic tooling for assembling arc-extinguishing chamber overtravel spring components that saves manpower, improves installation efficiency, increases installation accuracy, and is safe and convenient to operate.

[0010] The purpose of this utility model is achieved through the following technical solution: a semi-automatic tooling for assembling an arc-extinguishing chamber overtravel spring assembly, characterized in that it includes a support frame, a drive mechanism disposed on the support frame, a sliding trolley for supporting the vacuum arc-extinguishing chamber and its overtravel spring assembly, and a baffle. The sliding trolley is slidably mounted on the support frame, and the baffle is disposed in front of the sliding trolley and opposite to the overtravel spring assembly. The drive mechanism drives the sliding trolley to move the vacuum arc-extinguishing chamber and the overtravel spring assembly forward, so that they are pressed by the baffle until the overtravel spring automatically stops after pre-compression of the set stroke, thereby completing the assembly.

[0011] This utility model, through the control drive mechanism, can apply force in a jog and remove force in a jog. The combination of multi-limit design and horizontal layout allows the overtravel spring assembly to be adjusted to the ideal assembly state without unloading external force, freeing up hands. One person and one machine can easily complete the assembly efficiently and with high precision, safely and conveniently.

[0012] The driving mechanism of this utility model adopts a cylinder. The support frame includes a frame base plate, a mounting plate disposed at the rear end of the frame base plate, and a baffle disposed at the front end of the frame base plate. The cylinder body is fixed on the mounting plate, and the front end of the cylinder shaft passes through the mounting plate and is connected to the sliding trolley.

[0013] This utility model provides a pair of slide rails extending in the front-rear direction on both sides of the upper plate of the frame base plate. The sliding trolley includes a trolley base plate, a trolley transition plate disposed at the rear end of the trolley base plate, and a support plate supporting the vacuum interrupter and its overtravel spring assembly. The two sides of the trolley base plate are slidably engaged with the slide rails, and the front end of the cylinder shaft is fixed on the trolley transition plate.

[0014] This invention features a pair of horizontal rod-shaped guide rails on both sides of the trolley transition plate, and a pair of corresponding guide holes on the mounting plate. Self-lubricating guide rings are installed within these guide holes. The rod-shaped guide rails pass through the self-lubricating guide rings and slide in contact with them to guide the movement of the sliding trolley. The self-lubricating guide rings and rod-shaped guide rails have a clearance fit, ensuring smooth sliding contact and reduced resistance.

[0015] The rod-shaped guide rail and the cylinder shaft of this invention are located on the same height plane to ensure linearity.

[0016] The sliding trolley of this utility model consists of a trolley support plate located in the middle of the trolley base plate and a limiting plate for anti-torsion locking of the moving conductive rod of the vacuum interrupter located at the front end of the trolley base plate. The upper end of the trolley support plate is provided with a U-shaped groove that adapts to the outer wall of the vacuum interrupter, and the upper end of the limiting plate is provided with a U-shaped groove that adapts to the flat opening on the moving conductive rod of the vacuum interrupter.

[0017] The frame base plate of this utility model has pre-drilled fixing holes around its perimeter for bolting to the operating table. The mounting plate, baffle, and trolley transition plate of this utility model all have reinforcing ribs on one side.

[0018] The sliding trolley described in this invention has an adjustable stroke due to being pushed and pulled by the cylinder shaft, which can be used to assemble overtravel spring assemblies with different preload strokes.

[0019] This invention ensures assembly consistency for the same batch of overtravel spring assemblies by adjusting and fixing the push-pull stroke of the cylinder shaft. The push-pull operation of the cylinder shaft can be controlled with a single button, that is, one button can automatically apply pressure to the position and one button can automatically release pressure.

[0020] Compared with the prior art, the present invention has the following significant technical effects:

[0021] (1) This utility model adopts a horizontal design. The vacuum interrupter and its overtravel spring assembly to be installed are supported by a support plate and a fixed position on the sliding trolley. The components will not fall off during the pressure process, which can free up both hands to perform tasks such as adjusting the angle and inserting the limit pin.

[0022] (2) The stroke of the sliding trolley of this utility model is adjustable by the cylinder pushing and pulling, and it can be used to assemble over-stroke spring assemblies with different pre-compression strokes, making it highly applicable.

[0023] (3) For the assembly of the same batch of overtravel spring components, after using this utility model to test 1-2 pieces, adjust the cylinder push-pull stroke and solidify it. One-button operation automatically applies pressure to the position and one-button operation automatically removes pressure. The positioning is accurate, the installation is efficient, and the batch assembly has good consistency.

[0024] (4) This utility model is a semi-automatic one-button control, which can be easily completed by one person and one machine. It is convenient and highly operable.

[0025] (5) The overtravel spring preload of this utility model is limited by the limiting plate, the moving transmission rod and the overtravel spring seat. The spring will not fly out when squeezed, and the safety is high.

[0026] ⑹The sliding trolley of this utility model is guided and limited by four guide rails, which ensures good sliding linearity and assembly precision.

[0027] (7) During the process of the sliding trolley being subjected to force, there is no relative displacement between it and the components to be assembled, and the vacuum interrupter is not easily damaged during the assembly process.

[0028] (8) This utility model combines the assembly of the overtravel spring assembly and the installation of the flexible busbar, enabling multi-process assembly and achieving higher efficiency compared to separate workstation installation.

[0029] (9) This utility model adopts linear power transmission, which is highly efficient and has a simple structure. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention in use;

[0032] Figure 2 yes Figure 1 Enlarged perspective view of part A in the middle;

[0033] Figure 3 This is an exploded view of the overtravel spring assembly.

[0034] In the diagram: 1-Adjusting nut; 2-Buffer ring; 3-Shaft; 4-Bar-shaped guide rail; 5-Guide ring; 6-Mounting plate; 7-Frame base plate; 8-Trolley transition plate; 9-Static conductive rod; 10-Trolley support plate; 11-Trolley base plate; 12-Vacuum interrupter; 13-Limiting plate; 14-First slide rail; 15-Second slide rail; 16-Overtravel spring; 17-Overtravel spring seat; 18-Limiting pin; 19-Adjusting limit block; 20-Baffle; 21-Moving transmission rod; 22-Overtravel spring baffle; 23-Supporting frame; 24-Overtravel spring assembly; 25-Sliding trolley; 26-Cylinder; 27-Mounting bracket; 28-Reinforcing rib; 29-Flexible busbar. Detailed Implementation

[0035] like Figures 1-3 As shown, this utility model discloses a semi-automatic tooling for assembling an arc-extinguishing chamber overtravel spring assembly. The entire structure adopts a horizontal flat layout design, including a support frame 23, a drive mechanism set on the support frame 23, a sliding trolley 25 and a baffle 20 for supporting the vacuum arc-extinguishing chamber 12 and the overtravel spring assembly 24. The sliding trolley 25 is slidably mounted on the support frame 23. The baffle 20 is located in front of the sliding trolley 25 and opposite to the overtravel spring assembly 24. The drive mechanism drives the sliding trolley 25 to move the vacuum arc-extinguishing chamber 12 and the overtravel spring assembly 24 forward, so that they are pressed by the baffle 20 until the overtravel spring 16 is pre-compressed to the set stroke and automatically stops, thereby completing the assembly.

[0036] In this embodiment, the driving mechanism adopts a cylinder 26. The support frame 23 includes a frame base plate 7, a mounting plate 6 disposed at the rear end of the frame base plate 7, and a baffle 20 disposed at the front end of the frame base plate 7. The cylinder body of the cylinder 26 is fixed on the mounting plate 6 by a mounting bracket 27. The mounting flange of the cylinder 26 is bolted to the mounting plate 6. The front end of the shaft 3 of the cylinder 26 passes through the clearance hole on the mounting plate 6 and is connected to the sliding trolley 25. The diameter of the clearance hole is larger than the outer diameter of the shaft 3. The rear end of the shaft 3 has an external thread, on which an adjusting nut 1 and an annular buffer ring 2 are installed.

[0037] A pair of slide rails extending in the front-rear direction are provided on both sides of the upper plate surface of the frame base plate 7, namely the first slide rail 14 and the second slide rail 15. The cross-section of the first slide rail 14 and the second slide rail 15 is L-shaped. The sliding trolley 25 includes a trolley base plate 11, a trolley transition plate 8 set at the rear end of the trolley base plate 11, a support plate supporting the vacuum interrupter 12 and its overtravel spring assembly 24, and a limiting plate for anti-torsion locking of the moving conductive rod of the interrupter. The distance between the first slide rail 14 and the second slide rail 15 is slightly wider than the width of the trolley base plate 11. The second sliding contact surface of the slide rail is slightly higher than the thickness of the trolley base plate 11. The two sides of the trolley base plate 11 are locked between the first slide rail 14 and the second slide rail 15 and slide in cooperation with them. The front end of the shaft 3 of the cylinder 26 is connected to the trolley transition plate 8 through an external thread. A pair of horizontal rod-shaped guide rails 4 are threadedly connected to both sides of the trolley transition plate 8, and are located at the same height plane as the cylinder shaft 3. A pair of corresponding guide holes are provided on the mounting plate 6, and self-lubricating guide rings are installed in the guide holes. The pair of rod-shaped guide rails 4 pass through the guide rings 5 ​​in the guide holes (the rod-shaped guide rails 4 and the annular guide rings 5 ​​are coaxially clearance-fitted) to guide the movement of the sliding trolley 25, so that it can move linearly along the cylinder shaft direction. The support plate consists of a trolley support plate 10 set in the middle of the trolley base plate 11 and a limiting plate 13 set at the front end of the trolley base plate 11. The upper end of the trolley support plate 10 is provided with a U-shaped groove (diameter larger than the outer diameter of the vacuum interrupter 12) that is adapted to the outer wall of the vacuum interrupter. The upper end of the limiting plate 13 is provided with a U-shaped groove (diameter slightly larger than the anti-rotation limiting flat opening of the moving conductive rod of the vacuum interrupter 12) that is adapted to the flat opening of the moving conductive rod of the vacuum interrupter. The trolley transition plate 8, trolley support plate 10, and limiting plate 13 are all perpendicular to the trolley base plate 11. The U-shaped groove of the trolley support plate 10 and the U-shaped groove of the limiting plate 13 are coaxial with the vacuum interrupter static conductive rod 9, vacuum interrupter 12, and overtravel spring assembly 24.

[0038] The frame base plate 7 has pre-drilled fixing holes around its perimeter for bolting to the operating table, facilitating operation.

[0039] Two reinforcing ribs 28 are provided on one side of the mounting plate 6, baffle 20 and trolley transition plate 8. The reinforcing ribs are bolted to the plate body and the direction of the assist is the same as that of the cylinder shaft.

[0040] The working process of this utility model is as follows:

[0041] The vacuum interrupter 12 and its moving conductive rod are positioned in the U-shaped grooves of the trolley support plate 10 and the limiting plate 13. The flexible busbar 29 is placed in the grooves, and the moving transmission rod 21 is screwed in. The tool is locked to ensure a reliable connection between the moving conductive rod 21 and the flexible busbar 29. The overtravel spring baffle 22, overtravel spring 16, overtravel spring seat 17, and adjusting limit block 19 are installed coaxially in sequence. The control cylinder handle is jogged, and the cylinder shaft 3 moves forward, pushing the sliding trolley 25 until the first end of the cylinder shaft 3 completes its stroke and stops. Stop, without unloading the force, adjust the limit block 19, rotate the limit block 19 under the applied force, and wait until the moving transmission rod 21 coincides with the first waist hole of the overtravel spring seat 24 and the second waist hole is concentric with the second round hole (the first end of the moving transmission rod 21 is provided with a thread and a locking flat opening, and the second end is provided with a first U-shaped hole and a second waist hole. The overtravel spring seat 17 is also provided with a first round hole and a second waist hole, and the first waist hole and the second waist hole are perpendicular to each other), then the limit pin 18 can be inserted to the specified length to complete the assembly. Jog the control cylinder handle, the cylinder shaft moves to the left to the predetermined position and stops, pull the sliding trolley 25 to release the thrust, and wait for the next set of assembly.

[0042] The structure of the overtravel spring assembly 24 and its connection with the vacuum interrupter 12 are existing technologies and will not be described in detail here.

[0043] In addition, the stroke of the sliding trolley pushed and pulled by the cylinder is adjustable, so it can be used to assemble over-travel spring assemblies with different pre-compression strokes. It has strong applicability. Moreover, for the assembly of the same batch of over-travel spring assemblies, after using this utility model to assemble 1-2 pieces, the cylinder push-pull stroke is adjusted and solidified. One-button operation automatically applies pressure to the position and one-button operation automatically removes pressure. The positioning is accurate, the installation is efficient, and the batch assembly has good consistency.

[0044] This utility model is not limited to the specific embodiments described above. Based on the above content and in accordance with the common technical knowledge and conventional methods in the field, without departing from the basic technical idea of ​​this utility model, other equivalent modifications, substitutions or alterations can be made to this utility model, all of which fall within the protection scope of this utility model.

Claims

1. A semi-automatic tooling for assembling an arc-extinguishing chamber overtravel spring assembly, characterized in that: The assembly includes a support frame, a drive mechanism mounted on the support frame, a sliding trolley for supporting the vacuum interrupter and its overtravel spring assembly, and a baffle. The sliding trolley is slidably mounted on the support frame, and the baffle is located in front of the sliding trolley and opposite to the overtravel spring assembly. The drive mechanism drives the sliding trolley to move the vacuum interrupter and the overtravel spring assembly forward, so that they are pressed by the baffle until the overtravel spring automatically stops after pre-compression of its set stroke, thereby completing the assembly.

2. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 1, characterized in that: The driving mechanism uses a cylinder, and the support frame includes a frame base plate, a mounting plate at the rear end of the frame base plate, and a baffle at the front end of the frame base plate. The cylinder body is fixed on the mounting plate, and the front end of the cylinder shaft passes through the mounting plate and is connected to the sliding trolley.

3. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 2, characterized in that: A pair of slide rails extending in the front-rear direction are provided on both sides of the upper plate of the frame base plate. The sliding trolley includes a trolley base plate, a trolley transition plate provided at the rear end of the trolley base plate, and a support plate supporting the vacuum interrupter and its overtravel spring assembly. The two sides of the trolley base plate are slidably engaged with the slide rails, and the front end of the cylinder shaft is fixed on the trolley transition plate.

4. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 3, characterized in that: A pair of horizontal rod-shaped guide rails are provided on both sides of the trolley transition plate, and a pair of corresponding guide holes are provided on the mounting plate. A self-lubricating guide ring is installed in the guide hole. The pair of rod-shaped guide rails slide through the self-lubricating guide ring and slide with it to guide the movement of the sliding trolley.

5. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 4, characterized in that: The rod-shaped guide rail and the cylinder shaft are located at the same height plane.

6. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 5, characterized in that: The support plate of the sliding trolley consists of a trolley support plate located in the middle of the trolley base plate and a limiting plate for anti-torsion locking of the moving conductive rod of the vacuum interrupter located at the front end of the trolley base plate. The upper end of the trolley support plate is provided with a U-shaped groove that adapts to the outer wall of the vacuum interrupter, and the upper end of the limiting plate is provided with a U-shaped groove that adapts to the flat opening on the moving conductive rod of the vacuum interrupter.

7. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 6, characterized in that: The frame base plate has pre-drilled fixing holes around its perimeter for fixing to the operating table with bolts.

8. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 7, characterized in that: The mounting plate, baffle, and trolley transition plate all have reinforcing ribs on one side.

9. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 8, characterized in that: The stroke of the sliding trolley, pushed and pulled by the cylinder shaft, is adjustable to accommodate overtravel spring assemblies with different preload strokes.

10. The semi-automatic tooling for assembling the arc-extinguishing chamber overtravel spring assembly according to claim 9, characterized in that: The assembly of the same batch of overtravel spring assemblies can be achieved by one-button control of the cylinder shaft push-pull operation, that is, one-button operation automatically applies pressure to the position and one-button operation automatically releases pressure.

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