A circuit breaker spring mounting tool

Abstract

The application discloses a circuit breaker spring mounting tool and relates to the technical field of circuit breaker production. The circuit breaker spring mounting tool comprises a U-shaped push rod for stretching a circuit breaker spring body and a connecting round rod, the connecting round rod is connected with the U-shaped push rod, further comprises a driving member, the output end of the driving member is connected with the connecting round rod, one end of the connecting round rod is provided with a first threaded groove, one or two first nuts are threadedly connected with the first threaded groove, the U-shaped push rod is clamped between the two first nuts on the connecting round rod, and the position of the U-shaped push rod on the connecting round rod is adjusted through the positions of the two first nuts on the first threaded groove. When the circuit breaker spring is mounted, the U-shaped push rod is inserted into the circuit breaker spring body, the driving member is started to drive the circuit breaker spring body to be in a stretched state through the connecting round rod and the U-shaped push rod, the connecting operation of the circuit breaker spring body can be performed, and the mounting efficiency of the circuit breaker spring body is improved.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker manufacturing technology, specifically a circuit breaker spring mounting fixture. Background Technology

[0002] As is widely known, circuit breaker contact springs are springs used to keep the circuit breaker contacts tightly closed, ensuring the normal operation of the circuit breaker. The material and elasticity of the contact springs are crucial; improper installation can lead to circuit breaker malfunctions or accidents. During substation maintenance, circuit breaker repairs are often time-consuming and labor-intensive. During circuit breaker spring installation, due to the high stiffness of the springs, manual pressing is difficult, often requiring the careful coordination of multiple workers.

[0003] For example, the patent titled "Circuit Breaker Spring Installation Fixture," published on February 22, 2019, with announcement number CN208538775U, belongs to the technical field of tooling for circuit breaker production. It relates to a circuit breaker spring installation fixture, including a base plate. A mounting block is fixedly mounted on one end of the base plate surface. A guide pad is fixed to the opposite end of the base plate surface. One end of a rotating plate is hinged to the outer end of the guide pad. The other end of the rotating plate is hinged to a handle and one end of a connecting plate. The other end of the connecting plate is hinged to an elbow clamp, which slides within a sleeve on the guide pad. A guide post is fixed to the other end of the elbow clamp. A movable pressure plate is fixedly connected to the guide post. The movable pressure plate cooperates with a positioning block on the upper surface of the mounting block to perform the pressing operation on the spring assembly. This patented product has a simple structure and a clever and reasonable design. By using the handle to drive the movable pressure plate, multiple springs can be pressed simultaneously, enabling safe and reliable assembly of the spring assembly. The operation process is safe and reliable.

[0004] The shortcomings of existing technology are that when installing circuit breaker springs, workers need to stretch the springs. While the springs are stretched, they must be connected to the positioning slots, and then the positioning pins are inserted into both the positioning slots and the connecting holes of the springs to complete the installation. Because the springs need to be stretched during installation, workers must use a screwdriver to forcefully pull the springs repeatedly until successful installation, resulting in low installation efficiency and safety hazards. Furthermore, this damages the surface plating of the springs, making the damaged areas prone to rust. Even if installation is successful with force, the spring's stress is unstable, potentially leading to subsequent quality problems. Summary of the Invention

[0005] The purpose of this invention is to provide a circuit breaker spring mounting fixture to solve the technical problems in related technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a circuit breaker spring mounting fixture, comprising a U-shaped push rod for stretching the circuit breaker spring body and a connecting round rod, wherein the connecting round rod is connected to the U-shaped push rod, and further comprising a driving component, wherein the output end of the driving component is connected to the connecting round rod, and one end of the connecting round rod is provided with a first threaded groove, wherein one or two first nuts are threadedly connected to the first threaded groove, and the connecting round rod is clamped between the two first nuts, wherein the position of the U-shaped push rod on the connecting round rod is adjusted by the position of the two first nuts on the first threaded groove.

[0007] The connecting rod described above has a second threaded groove at the other end. A positioning ring is provided at the end of the second threaded groove near the first threaded groove. A second nut is threaded onto the second threaded groove. The second nut presses the U-shaped push rod against the positioning ring.

[0008] As described above, each of the two ends of the U-shaped push rod has an arc-shaped groove, and an arc-shaped clamping plate is slidably installed in each of the two arc-shaped grooves. Each of the two arc-shaped clamping plates has multiple first teeth arranged along its arc surface trajectory. The two arc-shaped clamping plates and their corresponding arc-shaped grooves are connected by a first elastic element.

[0009] As described above, a through hole is provided in the middle of the U-shaped push rod, and a driven block is slidably installed in the through hole. The driven block and the through hole are connected by a second elastic element.

[0010] As described above, the driven block and the two arc-shaped clamps are each connected by a connecting rope.

[0011] As described above, each of the two ends of the U-shaped push rod is provided with a positioning plate, each of the two positioning plates is rotatably mounted with a positioning shaft, and each of the two positioning shafts is mounted with a driven gear in the middle.

[0012] As described above, the two driven gears mesh with each other with their corresponding first teeth.

[0013] As mentioned above, a clamping plate is installed on each of the two positioning axes.

[0014] As described above, multiple limiting blocks are evenly arranged along the circumferential direction on the first nut and the positioning ring on the first threaded groove near the positioning ring side, and each of the limiting blocks and the U-shaped push rod are interlocked and fitted together.

[0015] As mentioned above, an anti-slip washer is provided between the first nut and the U-shaped push rod, and an anti-slip washer is also provided between the second nut and the U-shaped push rod.

[0016] The beneficial effects of this invention are as follows: When installing the circuit breaker spring, the worker first adjusts the position of the first nut on the first threaded groove, then adjusts the position of the U-shaped push rod on the connecting round rod using the two first nuts. The worker then connects the connecting round rod to the output end of the drive component, and inserts the U-shaped push rod into the gap of the circuit breaker spring body (generally inserted into the third or fourth spring of the circuit breaker spring body). After the U-shaped push rod is inserted into the circuit breaker spring body, the drive component is activated to push the circuit breaker spring body through the connecting round rod and the U-shaped push rod, causing the connecting round rod and the U-shaped push rod to push the circuit breaker spring body into a stretched state. At this time, the worker can perform the connection operation on the circuit breaker spring body without needing to use a screwdriver to stretch the circuit breaker spring body. The drive component pulls the circuit breaker spring body to the required installation height, allowing the circuit breaker spring body to be easily and successfully attached, thereby improving the installation efficiency of the circuit breaker spring body. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a partial three-dimensional structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure;

[0020] Figure 3 This is a cross-sectional structural diagram of the clamping plate of the present invention clamping and positioning the circuit breaker spring body;

[0021] Figure 4 This is a partial cross-sectional structural schematic diagram of another embodiment of the present invention;

[0022] Figure 5 A partial three-dimensional structural schematic diagram of another embodiment of the present invention;

[0023] Figure 6 For the present invention Figure 5 A first-person perspective cross-sectional structural diagram;

[0024] Figure 7 For the present invention Figure 5 A cross-sectional structural diagram from a second perspective;

[0025] Figure 8 For the present invention Figure 7A partial enlarged cross-sectional structural diagram at point M;

[0026] Figure 9 This is a schematic cross-sectional view of the support plate of the present invention when it is compressed by the circuit breaker spring body.

[0027] Figure 10 For the present invention Figure 9 A schematic diagram of a partially enlarged cross-sectional structure at point N;

[0028] Figure 11 This is a cross-sectional structural schematic diagram of another embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. U-shaped push rod; 111. Connecting part; 112. Abutting part; 2. Connecting round rod; 3. Driving component; 4. First nut; 5. Circuit breaker spring body; 6. Positioning ring; 7. Second nut; 8. Limiting block; 9. Anti-slip washer; 10. Arc groove; 11. Arc clamp; 12. First tooth; 13. First elastic element; 14. Through hole; 15. Driven block; 16. Second elastic element; 17. Connecting rope; 18. Positioning plate; 19. 20. Positioning shaft; 21. Driven gear; 22. Clamping plate; 23. Sliding round rod; 24. Groove; 25. Support plate; 26. Semi-circular arc groove; 27. Receiving groove; 28. Third elastic element; 29. ​​Oblique through groove; 30. First wedge block; 31. Through groove; 32. Oblique rod; 33. Second wedge block; 34. Limiting rod; 35. Sliding groove; 36. Driving rack; 37. Driven gear; 38. Telescopic rod; 39. Insert rod; 30. Support rod. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the appendix. Figure 1 To be continued Figure 11 The present invention will now be described in further detail.

[0032] One embodiment of the present invention relates to a circuit breaker spring mounting fixture, comprising a U-shaped push rod 1 for stretching the circuit breaker spring body 5 and a connecting rod 2, wherein the U-shaped push rod 1 is connected to the connecting rod 2, and a driving component 3 is also included. The output end of the driving component 3 is connected to the connecting rod 2. One end of the connecting rod 2 is provided with a first threaded groove, and one or two first nuts 4 are threadedly connected to the first threaded groove. The U-shaped push rod 1 is clamped between the two first nuts 4 on the connecting rod 2, and the position of the U-shaped push rod 1 on the connecting rod 2 is adjusted by the position of the two first nuts 4 on the first threaded groove.

[0033] Specifically, the circuit breaker spring body 5 is a device that can keep the circuit breaker contacts tightly closed. The semi-circular structure in the middle of the U-shaped push rod 1 and the gap between the U-shaped push rod 1 and the circuit breaker spring body 5 are interlocked and tightly fitted, so that the U-shaped push rod 1 can push the circuit breaker spring body 5 to perform a stretching operation. One end of the connecting round rod 2 has a first threaded groove, and one or two first nuts 4 are threaded onto the first threaded groove. The U-shaped push rod 1 is clamped between the two first nuts 4 on the connecting round rod 2. The other end of the connecting round rod 2 has a second threaded groove, and the second threaded groove... A positioning ring 6 is provided at one end of the groove near the first threaded groove. A second nut 7 is threadedly connected to the second threaded groove. The second nut 7 presses the U-shaped push rod 1 against the positioning ring 6. Multiple limiting blocks 8 are evenly arranged along the circumferential direction on the first nut 4 on the side of the first threaded groove near the positioning ring 6 and on the positioning ring 6. Each limiting block 8 and the U-shaped push rod 1 are interlocked and fitted together. An anti-slip washer 9 is provided between the first nut 4 and the U-shaped push rod 1. An anti-slip washer 9 is also provided between the second nut 7 and the U-shaped push rod 1.The interlocking of the limiting block 8 and the U-shaped push rod 1 ensures that the U-shaped push rod 1 will not rotate on the connecting rod 2, guaranteeing the stability of the U-shaped push rod 1 in stretching the circuit breaker spring body 5. The second nut 7 and anti-slip washer 9 securely mount the U-shaped push rod 1 onto the positioning ring 6, enabling positioning and installation. When adjusting the gap between the two U-shaped push rods 1, the position of the first nut 4 near the positioning ring 6 on the first threaded groove is adjusted. After the position of the first nut 4 on the first threaded groove is determined, the U-shaped push rod 1 is inserted into the limiting block 8 on the first nut 4. Then, the other first nut 4 and anti-slip washer 9 are used to position the U-shaped push rod 1, thereby adjusting the gap between the two U-shaped push rods 1 on the connecting rod 2. Two U-shaped push rods 1 can adapt to the gap size of the circuit breaker spring body 5, allowing both U-shaped push rods 1 to be inserted into the gap of the circuit breaker spring body 5. Once both U-shaped push rods 1 are inserted, the drive component 3 (a device with a linear reciprocating output, preferably a hydraulic cylinder) is activated, causing it to move the connecting round rod 2 and the U-shaped push rods 1. This causes the connecting round rod 2 and the U-shaped push rods 1 to stretch the circuit breaker spring body 5 to the required installation height. Then, the circuit breaker spring body 5 is installed in the positioning slot through the positioning pin, completing the installation of the circuit breaker spring body 5. This allows for easy and successful spring mounting of the circuit breaker spring body 5, improving installation efficiency. It eliminates the need for workers to use screwdrivers or other tools to stretch the circuit breaker spring body 5, and does not damage the surface plating of the circuit breaker spring body 5, thus improving the stability of the circuit breaker spring body 5 installation.

[0034] The shortcomings of existing technology are that when installing circuit breaker springs, workers need to stretch the springs. While the springs are stretched, they must be connected to the positioning slots, and then the positioning pins are inserted into both the positioning slots and the connecting holes of the springs to complete the installation. Because the springs need to be stretched during installation, workers must use a screwdriver to forcefully pull the springs, repeatedly applying force to achieve successful installation. This results in low installation efficiency and safety hazards. Furthermore, it damages the surface plating of the springs, making the damaged areas prone to rust. Even if installation is successful with force, the spring's stress is unstable, potentially leading to subsequent quality problems.

[0035] The beneficial effects of this embodiment are as follows: When installing the circuit breaker spring, the worker first adjusts the position of the first nut 4 on the first threaded groove, then adjusts the position of the U-shaped push rod 1 on the connecting round rod 2 using the two first nuts 4. Then, the worker connects the connecting round rod 2 and the output end of the driving component 3, and then inserts the U-shaped push rod 1 into the gap of the circuit breaker spring body 5 (generally inserted into the third or fourth spring of the circuit breaker spring body 5). After the U-shaped push rod 1 is inserted into the circuit breaker spring body 5, the driving component 3 is activated to push the circuit breaker spring body 5 through the connecting round rod 2 and the U-shaped push rod 1, so that the connecting round rod 2 and the U-shaped push rod 1 push the circuit breaker spring body 5 into a stretched state. At this time, the worker can perform the connection operation of the circuit breaker spring body 5 without the need for the worker to use a screwdriver to stretch the circuit breaker spring body 5. The driving component 3 pulls the circuit breaker spring body 5 to the required installation height, so that the circuit breaker spring body 5 can be easily and successfully attached to the spring, thereby improving the installation efficiency of the circuit breaker spring body 5.

[0036] In another embodiment of the present invention, each of the two ends of the U-shaped push rod 1 has an arc-shaped groove 10, and an arc-shaped clamping plate 11 is slidably installed in each of the two arc-shaped grooves 10. Each of the two arc-shaped clamping plates 11 has a plurality of first teeth 12 arranged along its arc surface trajectory. Each of the two arc-shaped clamping plates 11 and its corresponding arc-shaped groove 10 is connected by a first elastic element 13. A through hole 14 is opened in the middle of the U-shaped push rod 1, and a driven block 15 is slidably installed in the through hole 14. 5 and through hole 14 are connected by a second elastic element 16; the driven block 15 and the two arc-shaped clamping plates 11 are each connected by a connecting rope 17; each of the two ends of the U-shaped push rod 1 is provided with a positioning plate 18, and a positioning shaft 19 is rotatably mounted on each of the two positioning plates 18, and a driven gear 20 is mounted in the middle of each of the two positioning shafts 19; the two driven gears 20 mesh with their corresponding first teeth 12; a clamping plate 21 is mounted on each of the two positioning shafts 19.

[0037] Specifically, during the process of inserting the U-shaped push rod 1 into the circuit breaker spring body 5, the driven block 15 on the U-shaped push rod 1 first contacts the outer wall of the circuit breaker spring body 5, so that under the action of the circuit breaker spring body 5, the driven block 15 slides into one end of the through hole 14, and the driven block 15 squeezes the second elastic element 16 (the second elastic element 16 is an element that can extend and retract and reset, preferably a spring), so that the second elastic element 16 is in a compressed state. Simultaneously, the driven block 15 pulls the connecting rope 17, which drives the two arc-shaped clamping plates 11 to slide into one end of the arc-shaped groove 10. The arc-shaped clamping plates 11 squeeze the first The elastic element 13 (the first elastic element 13 is a component capable of extension and retraction, preferably a spring) is compressed, causing the first elastic element 13 to be in a compressed state. Due to the meshing between the first tooth 12 on the arc-shaped clamping plate 11 and the driven gear 20, the arc-shaped clamping plate 11 drives the driven gear 20 to rotate via the first tooth 12. This drives the positioning shaft 19 to rotate, and the positioning shaft 19 drives the clamping plate 21 to rotate towards the end closer to the circuit breaker spring body 5. This allows the two clamping plates 21 to simultaneously clamp the circuit breaker spring body 5, improving the stability of the clamping between the U-shaped push rod 1 and the circuit breaker spring body 5, and preventing the U-shaped push rod from collapsing. When the U-shaped push rod 1 pushes the circuit breaker spring body 5 for tensioning, slippage occurs at the contact point between the U-shaped push rod 1 and the circuit breaker spring body 5, improving the stability of the U-shaped push rod 1 in pushing the circuit breaker spring body 5 for tensioning. After the circuit breaker spring body 5 is installed, after being stretched by the positioning pin and positioning slot, the drive component 3 does not need to provide thrust to the U-shaped push rod 1. Furthermore, because the gap of the circuit breaker spring body 5 increases when it is in the stretched state, the operator can remove the U-shaped push rod 1 from the gap of the circuit breaker spring body 5. During the process, under the rebound action of the second elastic element 16, the second elastic element 16 pushes the driven block 15 to slide to the outside end of the through hole 14. Simultaneously, under the rebound action of the first elastic element 13, the first elastic element 13 pushes the arc-shaped clamping plate 11 to slide to the outside end of the arc-shaped groove 10. The arc-shaped clamping plate 11 drives the driven gear 20 to rotate through the first tooth 12. The driven gear 20 drives the clamping plate 21 to rotate through the positioning shaft 19, so that the clamping plate 21 releases the clamping operation on the circuit breaker spring body 5. Then, the worker removes the U-shaped push rod 1 from the gap of the circuit breaker spring body 5, which facilitates the installation of the circuit breaker spring body 5 next time.

[0038] In another embodiment of the present invention, each end of the U-shaped push rod 1 is provided with an abutment mechanism, the abutment mechanism including a sliding round rod 22. Each of the two ends of the U-shaped push rod 1 has a groove 23, a support plate 24 is slidably installed in the groove 23, a semi-circular groove 25 is provided on the support plate 24, and a receiving groove 26 is provided at the bottom end of the support plate 24. A support rod 39 is provided in the middle of the groove 23, and a sliding round rod 22 is slidably installed in the middle of the support rod 39. The sliding round rod 22 and the inner wall of the receiving groove 26 are connected by a first... Three elastic elements 27 are connected together. The middle part of the sliding round rod 22 is provided with an oblique through groove 28. Two first wedge blocks 29 are symmetrically arranged at the bottom end of the receiving groove 26. A through groove 30 is provided on the support rod 39. An oblique rod 31 is slidably installed in the through groove 30. The oblique rod 31 is slidably installed in the oblique through groove 28. A second wedge block 32 is connected to each end of the oblique rod 31. Both second wedge blocks 32 are slidably installed in the through groove 30. The two second wedge blocks 32 are respectively wedge-shaped with their corresponding first wedge blocks 29.

[0039] Specifically, due to the inconsistent height of the gap position of the circuit breaker spring body 5, when one end of the U-shaped push rod 1 is pressed against the circuit breaker spring body 5, the other end of the U-shaped push rod 1 and the circuit breaker spring body 5 will not be pressed against each other, but will have a certain gap. This results in uneven pushing force on the circuit breaker spring body 5 when the U-shaped push rod 1 pushes it to perform the stretching operation (i.e., uneven force is applied to the circuit breaker spring body 5 during stretching), which in turn affects the stability of the U-shaped push rod 1 in pushing the circuit breaker spring body 5 to perform the stretching operation. In this embodiment, the abutment mechanism on the U-shaped push rod 1 is provided to ensure that the force on the U-shaped push rod 1 is relatively uniform when it is pushed. During the process of the operator inserting the U-shaped push rod 1 into the gap between the circuit breaker spring body 5, the support plate 24 on one side of the U-shaped push rod 1 abuts against the circuit breaker spring body 5, causing the semi-circular groove 25 on the support plate 24 on one side of the U-shaped push rod 1 to engage with the circuit breaker spring body 5. A certain gap exists between the semi-circular groove 25 on the support plate 24 on the other side of the U-shaped push rod 1 and the circuit breaker spring body 5 (e.g., ...). Figure 7As shown, during the stretching operation of the circuit breaker spring body 5 pushed by the U-shaped push rod 1, under the elastic force of the circuit breaker spring body 5, the support plate 24 on the U-shaped push rod 1 gradually slides towards one end of the groove 23. During this movement, the support plate 24 drives the first wedge block 29 to move towards the end closer to the support rod 39. Because the first wedge block 29 and the second wedge block 32 are wedge-shaped, the first wedge block 29 pushes the second wedge block 32 to slide within the slot 30. Simultaneously, the second wedge block 32 drives the inclined rod 31 to slide along the trajectory of the inclined through groove 28. This causes the second wedge block 32, through the inclined rod 31 and the inclined through groove 28, to drive the sliding round rod 22 towards the end closer to the support plate 24. The moving round rod 22 compresses the third elastic element 27 (the third elastic element 27 is a component capable of extension and retraction, preferably a spring), causing the third elastic element 27 to be in a compressed state. The third elastic element 27 provides support to the support plate 24 through the sliding round rod 22, allowing the support plate 24 to better support the circuit breaker spring body 5. Similarly, after the support plate 24 on the other side of the U-shaped push rod 1 abuts against the circuit breaker spring body 5, the support plate 24 provides support to the circuit breaker spring body 5 under the push of the third elastic element 27. This can balance the support provided by the U-shaped push rod 1 and the support plate 24 on both sides of the circuit breaker spring body 5 to a certain extent, making the pushing force on the circuit breaker spring body 5 more uniform when stretched (e.g., Figure 9 and Figure 10 As shown), simultaneously, the support rod 39, the inclined rod 31, the sliding round rod 22, and the second wedge block 32 provide support force for the first wedge block 29, so that the first wedge block 29 provides support force for the support plate 24, making the support plate 24 support the circuit breaker spring body 5 more stable. As those skilled in the art will know, by adjusting the inclination angle of the wedge fit between the first wedge block 29 and the second wedge block 32, adjusting the inclination angle between the inclined rod 31 and the inclined through groove 28, and adjusting the elastic force of the two third elastic elements 27, the sliding distance of the support plate 24 on one side of the U-shaped push rod 1 can be large while the sliding distance of the support plate 24 on the other side of the U-shaped push rod 1 can be small. The elastic force provided by the third elastic element 27 to the support plate 24 is approximately the same, which improves the balance of the thrust provided by the U-shaped push rod 1 to the circuit breaker spring body 5, thereby improving the stability of the circuit breaker spring body 5 installation.

[0040] After the circuit breaker spring body 5 is installed, the operator starts the drive unit 3 to move the U-shaped push rod 1 and the connecting round rod 2. Due to the increased spacing after the circuit breaker spring body 5 is stretched, the U-shaped push rod 1 and the support plate 24 disengage from the circuit breaker spring body 5. Under the rebound action of the third elastic element 27, the third elastic element 27 pushes the support plate 24 to slide to one end outside the groove 23. Simultaneously, the third elastic element 27 drives the sliding round rod 22 to slide away from the support plate 24. The support plate 24 pushes the second wedge block 32 through the first wedge block 29. The second wedge block 32 drives the sliding round rod 22 to move away from the support plate 24 through the inclined rod 31 and the inclined through groove 28, so that the support plate 24 returns to the position where it does not abut against the circuit breaker spring body 5, which facilitates the U-shaped push rod 1 and the support plate 24 to provide stretching power for the circuit breaker spring body 5 in the next operation.

[0041] In another embodiment of the present invention, each of the support plates 24 is provided with a limiting mechanism, the limiting mechanism including a limiting rod 33, a sliding groove 34 is provided on the top side of the semi-circular arc groove 25 on the support plate 24, the sliding groove 34 and the receiving groove 26 are interconnected, the limiting rod 33 is slidably installed in the sliding groove 34, an active rack 35 is provided at the top of the support rod 39, a passive gear 36 is rotatably installed in the sliding groove 34, and the passive gear 36 and the active rack 35 are meshed with each other, a telescopic rod 37 is installed on the passive gear 36, and the telescopic rod 37 and the end of the limiting rod 33 away from the semi-circular arc groove 25 are rotatably connected.

[0042] Specifically, when the circuit breaker spring body 5 and the support plate 24 abut against each other, and under the elastic force of the circuit breaker spring body 5, the support plate 24 slides towards one end of the groove 23. Since the active rack 35 is fixedly installed on the support rod 39, its position does not change. The support plate 24 drives the driven gear 36 to slide towards one end of the groove 23. Because the driven gear 36 and the active rack 35 mesh with each other, the driven gear 36 drives the telescopic rod 37 (the telescopic rod 37 is a length-adjustable rod; its length will passively change). The distance between the adaptive passive gear 36 and the limiting rod 33 rotates, while the telescopic rod 37 and the limiting rod 33 are rotatably connected. This causes the length of the telescopic rod 37 to change, while simultaneously driving the limiting rod 33 to slide along the trajectory of the slide groove 34. This causes the telescopic rod 37 to drive the limiting rod 33 to slide closer to the end of the semi-circular arc groove 25. This allows the limiting rod 33 to limit the circuit breaker spring body 5 on the outer side of the semi-circular arc groove 25, preventing the circuit breaker spring body 5 from sliding out of the semi-circular arc groove 25. This makes the U-shaped push rod 1 and the semi-circular arc groove 25 more stable in pushing the circuit breaker spring body 5 for tensioning operations.

[0043] After the circuit breaker spring body 5 is installed, the operator activates the drive unit 3 to move the U-shaped push rod 1 and the connecting rod 2. Due to the increased spacing after the circuit breaker spring body 5 is stretched, the U-shaped push rod 1 and the support plate 24 disengage from the circuit breaker spring body 5. Under the rebound action of the third elastic element 27, the third elastic element 27 pushes the support plate 24 to slide towards the outside of the groove 23. Simultaneously, the support plate 24 drives the driven gear 36 to slide towards the outside of the groove 23, causing the driven gear 36 to drive the telescopic rod 3. 7. When rotated, the telescopic rod 37 drives the limiting rod 33 to slide along the track of the slide groove 34, causing the telescopic rod 37 to drive the limiting rod 33 to slide away from the end of the semi-circular arc groove 25. This releases the limiting rod 33 from the limiting operation on the circuit breaker spring body 5 on the outer side of the semi-circular arc groove 25, allowing the limiting rod 33 to slide into the slide groove 34. Simultaneously, the support plate 24 returns to the position where it does not abut against the circuit breaker spring body 5, facilitating the U-shaped push rod 1 and the support plate 24 to provide tensioning power to the circuit breaker spring body 5 in the next operation.

[0044] In another embodiment provided by the present invention, such as Figure 11 As shown, the U-shaped push rod 1 is divided into a connecting part 111 and an abutting part 112. The connecting part 111 is connected to the connecting round rod 2, and the abutting part 112 is connected to the circuit breaker spring body 5. The abutting part 112 and the connecting part 111 are rotatably connected to each other, and the abutting part 112 and the connecting part 111 are connected to each other through a plug rod 38.

[0045] Specifically, when it is necessary to adjust the contact position between the limiting mechanism and the abutment mechanism on the U-shaped push rod 1 and the circuit breaker spring body 5, the insert rod 38 is pulled out from the connecting part 111 and the abutment part 112, then the abutment part 112 is rotated 180 degrees, and then the insert rod 38 is inserted into the connecting part 111 and the abutment part 112, so that the insert rod 38 connects the connecting part 111 and the abutment part 112, preventing the connecting part 111 and the abutment part 112 from rotating when providing tensile force to the circuit breaker spring body 5. As those skilled in the art will know, the connecting part 111 of the insert rod 38 and the connecting part 111 and the abutment part 112 can be a threaded connection or other plug-in positioning structure to ensure that the connecting part 111 and the abutment part 112 will not rotate when providing tensile force to the circuit breaker spring body 5.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker spring mounting fixture, comprising a U-shaped push rod for stretching the circuit breaker spring body and a connecting round rod, wherein the connecting round rod is connected to the U-shaped push rod, characterized in that, It also includes a driving component, the output end of which is connected to a connecting round rod. One end of the connecting round rod is provided with a first threaded groove. One or two first nuts are threadedly connected to the first threaded groove. A U-shaped push rod is clamped between the two first nuts on the connecting round rod. The position of the U-shaped push rod on the connecting round rod is adjusted by the position of the two first nuts on the first threaded groove. The other end of the connecting rod is provided with a second threaded groove. A positioning ring is provided at the end of the second threaded groove near the first threaded groove. A second nut is threaded onto the second threaded groove. The second nut presses the U-shaped push rod against the positioning ring. Multiple limiting blocks are evenly arranged along the circumferential direction on the first nut and the positioning ring on the first threaded groove near the positioning ring. Each of the limiting blocks and the U-shaped push rod are interlocked and fitted together. An anti-slip washer is provided between the first nut and the U-shaped push rod, and an anti-slip washer is also provided between the second nut and the U-shaped push rod; Each end of the U-shaped push rod is provided with an abutment mechanism, the abutment mechanism including a sliding round rod. Each of the two ends of the U-shaped push rod has a groove, and a support plate is slidably installed in the groove. The support plate has a semi-circular arc groove, and the bottom end of the support plate has a receiving groove. A support rod is provided in the middle of the groove, and a sliding round rod is slidably installed in the middle of the support rod. The sliding round rod and the inner wall of the receiving groove are connected by a third elastic element. A through groove is provided in the middle of the sliding round rod. Two first wedge blocks are symmetrically arranged at the bottom end of the receiving groove. A through groove is provided on the support rod, and an inclined rod is slidably installed in the through groove. The inclined rod is slidably installed in the through groove. Each end of the inclined rod is connected to a second wedge block, and both second wedge blocks are slidably installed in the through groove. The two second wedge blocks are wedge-shapedly engaged with their corresponding first wedge blocks. The U-shaped push rod is divided into a connecting part and a stop part. The connecting part and the connecting round rod are connected to each other. The stop part is connected to the circuit breaker spring body. The stop part and the connecting part are rotatably connected to each other. The stop part and the connecting part are connected to each other through a plug rod.

2. The circuit breaker spring mounting fixture according to claim 1, characterized in that, The U-shaped push rod has an arc-shaped groove at each of its two ends, and an arc-shaped clamp is slidably installed in each of the two arc-shaped grooves. Each of the two arc-shaped clamps has a plurality of first teeth arranged along its arc surface trajectory. The two arc-shaped clamps and their corresponding arc-shaped grooves are connected by a first elastic element.

3. The circuit breaker spring mounting fixture according to claim 2, characterized in that, A through hole is provided in the middle of the U-shaped push rod, and a driven block is slidably installed in the through hole. The driven block and the through hole are connected by a second elastic element.

4. The circuit breaker spring mounting fixture according to claim 3, characterized in that, The driven block and the two arc-shaped clamps are each connected by a connecting rope.

5. A circuit breaker spring mounting fixture according to claim 4, characterized in that, Each of the two ends of the U-shaped push rod is provided with a positioning plate, and a positioning shaft is rotatably mounted on each of the two positioning plates. A driven gear is installed in the middle of each of the two positioning shafts.

6. The circuit breaker spring mounting fixture according to claim 5, characterized in that, The two driven gears mesh with each other with their corresponding first teeth.

7. A circuit breaker spring mounting fixture according to claim 5, characterized in that, A clamping plate is installed on each of the two positioning axes.

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