Circuit breaker spring installation tool

Abstract

The invention discloses a circuit breaker spring installation tool, and relates to the technical field of circuit breaker production, the circuit breaker spring installation tool comprises a U-shaped push rod used for stretching a circuit breaker spring body and a connecting round rod, the connecting round rod is connected with the U-shaped push rod, the circuit breaker spring installation tool further comprises a driving piece, the output end of the driving piece is connected with the connecting round rod, and the connecting round rod is connected with the driving piece. A first threaded groove is formed in one end of the connecting round rod, two first nuts are in threaded connection with the first threaded groove, a 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 installed, the U-shaped push rod is inserted into the circuit breaker spring body, the driving piece is started to push the circuit breaker spring body to be in a stretching state through the connecting round rod and the U-shaped push rod, the circuit breaker spring body can be connected, and the installation efficiency of the circuit breaker spring body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breaker production, in particular to a circuit breaker spring installation tool. Background Art

[0002] As is known, the circuit breaker contact spring is a spring used to keep the circuit breaker contacts tightly closed, and its function is to ensure the normal operation of the circuit breaker. The material and elasticity of the contact spring are very important. Once improperly installed, it will cause the circuit breaker to fail or an accident. During the maintenance of the substation, the inspection and repair of the circuit breaker is often time-consuming and laborious. During the installation of the circuit breaker spring, due to the high hardness of the spring, it is difficult to press it manually, and it often requires the careful cooperation of multiple staff members to install it.

[0003] For example, the patent with the publication number CN208538775U and the publication date of February 22, 2019, entitled "Circuit Breaker Spring Installation Tool", belongs to the technical field of tooling for circuit breaker production, and relates to a circuit breaker spring installation tool, including a bottom plate, a mounting block fixedly arranged at one end of the bottom plate surface, a guide pad fixed at the opposite end of the bottom plate surface to the mounting block, the outer end of the guide pad is hinged to one end of the rotating plate, the other end of the rotating plate is hinged to the handle and one end of the connecting plate, the other end of the connecting plate is hinged to one end of the elbow clamp, the elbow clamp is slidably arranged in the sleeve on the guide pad, the other end of the elbow clamp is fixed to the guide column, the guide column is fixedly connected to the movable pressure plate, and the movable pressure plate cooperates with the positioning block arranged on the upper surface of the mounting block to realize the press-fitting operation of the spring assembly. The patented product has a simple structure and an ingenious and reasonable design. The handle in the patented product drives the movable pressure plate to realize the synchronous press-fitting of multiple groups of springs, and the safe and reliable assembly operation of the spring assembly can be realized, and the operation process is safe and reliable.

[0004] The disadvantage of the prior art is that when installing the circuit breaker spring, the staff needs to stretch the circuit breaker spring. When the circuit breaker spring is in a stretched state, the circuit breaker spring needs to be connected to the positioning slot, and then the positioning pin is inserted into the positioning slot and the connecting hole of the circuit breaker spring to achieve the installation of the circuit breaker spring. When installing the circuit breaker spring, since the circuit breaker spring needs to be installed in a stretched state, the staff has to use a screwdriver to stretch the spring, and repeatedly use force for many times to successfully install it, resulting in low installation efficiency and safety hazards. It will also damage the surface coating on the surface of the spring, and the damaged coating is prone to rust. Even if the installation is successful with force, the force on the spring is unstable, which is prone to subsequent quality problems. Summary of the invention

[0005] The purpose of the present invention is to provide a circuit breaker spring installation tool to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a circuit breaker spring installation tool, comprising a U-shaped push rod for stretching a circuit breaker spring body and a connecting round rod, the connecting round rod being connected to the U-shaped push rod, and also comprising a driving member, the output end of the driving member being connected to the connecting round rod, one end of the connecting round rod being provided with a first thread groove, the first thread groove being threadedly connected to one or two first nuts, the connecting round rod being sandwiched between the two first nuts, and the position of the U-shaped push rod on the connecting round rod being adjusted by the position of the two first nuts on the first thread groove.

[0007] As mentioned above, the other end of the connecting round rod is provided with a second thread groove, and a positioning ring is provided at one end of the second thread groove close to the first thread groove. A second nut is threadedly connected to the second thread groove, and the second nut presses the U-shaped push rod against the positioning ring.

[0008] As mentioned above, each end of the U-shaped push rod is provided with an arc groove, and an arc clamping plate is slidably installed in each of the two arc grooves. A plurality of first teeth are arranged on the two arc clamping plates along their arc surface tracks, and the two arc clamping plates and the corresponding arc grooves are connected by a first elastic member.

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

[0010] As mentioned above, the driven block and the two arc-shaped clamping plates are connected via a connecting rope.

[0011] As mentioned above, a positioning plate is respectively arranged at the two ends of the U-shaped push rod, a positioning shaft is rotatably mounted on each of the two positioning plates, and a driven gear is respectively mounted at the middle of the two positioning shafts.

[0012] As mentioned above, the two driven gears are respectively meshed with their corresponding first teeth.

[0013] As mentioned above, a clamping plate is respectively installed on the two positioning shafts.

[0014] As mentioned above, a plurality of limit blocks are evenly arranged on the first nut on the first thread groove near the side of the positioning ring and on the positioning ring along the circumferential direction thereof, and each of the limit blocks and the U-shaped push rod are plugged and matched with each other.

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

[0016] The beneficial effect of the present invention is that when installing the circuit breaker spring, the worker first adjusts the position of the first nut on the first thread groove, and then adjusts the position of the U-shaped push rod on the connecting round rod through the two first nuts. Then the worker connects the connecting round rod and the output end of the driving member, and then inserts the U-shaped push rod into the gap of the circuit breaker spring body (generally inserted into the third spring or the fourth spring of the circuit breaker spring body). After the U-shaped push rod is inserted into the circuit breaker spring body, the driving member is started to push the circuit breaker spring body through the connecting round rod and the U-shaped push rod, so that the connecting round rod and the U-shaped push rod push the circuit breaker spring body to be in a stretched state. At this time, the worker can connect the circuit breaker spring body without using a screwdriver to stretch the circuit breaker spring body. The circuit breaker spring body is pulled up to the required installation height by the driving member, so that the circuit breaker spring body can be easily hung with the spring successfully, thereby improving the installation efficiency of the circuit breaker spring body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of a partial three-dimensional structure of an embodiment provided by the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure of; Figure 3 It is a cross-sectional structural schematic diagram of a state in which the clamping plate of the present invention clamps and positions the circuit breaker spring body; Figure 4 A schematic diagram of a partial cross-sectional structure of another embodiment provided by the present invention; Figure 5 A schematic diagram of a partial three-dimensional structure of another embodiment provided by the present invention; Figure 6 For the present invention Figure 5 A schematic cross-sectional structure diagram of a first perspective; Figure 7 For the present invention Figure 5 A schematic cross-sectional structure diagram of a second viewing angle; Figure 8 For the present invention Figure 7 A schematic diagram of a partially enlarged cross-sectional structure at M; Fig. 9 It is a schematic cross-sectional structure diagram of the supporting plate of the present invention when it is squeezed by the circuit breaker spring body; Fig.10For the present invention Fig. 9 A schematic diagram of a partially enlarged cross-sectional structure at location N; Fig.11 The present invention provides a cross-sectional structural diagram of another embodiment.

[0019] Description of reference numerals: 1. U-shaped push rod; 111. connecting part; 112. abutting part; 2. connecting round rod; 3. driving member; 4. first nut; 5. circuit breaker spring body; 6. positioning ring; 7. second nut; 8. stopper; 9. anti-slip washer; 10. arc groove; 11. arc clamping plate; 12. first tooth; 13. first elastic member; 14. through hole; 15. driven block; 16. second elastic member; 17. connecting rope; 18. positioning plate; 19 , positioning shaft; 20, driven gear; 21, clamping plate; 22, sliding rod; 23, groove; 24, supporting plate; 25, semicircular arc groove; 26, accommodating groove; 27, third elastic member; 28, oblique through groove; 29, first wedge block; 30, through groove; 31, oblique rod; 32, second wedge block; 33, limiting rod; 34, sliding groove; 35, active rack; 36, passive gear; 37, telescopic rod; 38, insertion rod; 39, support rod. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, Figure 1 To Attachment Fig.11 The present invention is further described in detail.

[0021] An embodiment provided by the present invention relates to a circuit breaker spring installation tool, comprising a U-shaped push rod 1 for stretching a circuit breaker spring body 5 and a connecting round rod 2, the connecting round rod 2 being connected to the U-shaped push rod 1, and also comprising a driving member 3, the output end of the driving member 3 being connected to the connecting round rod 2, one end of the connecting round rod 2 being provided with a first thread groove, one or two first nuts 4 being threadedly connected to the first thread groove, the U-shaped push rod 1 being clamped between the two first nuts 4 on the connecting round rod 2, and the position of the U-shaped push rod 1 on the connecting round rod 2 is adjusted by the position of the two first nuts 4 on the first thread groove.

[0022] Specifically, the circuit breaker spring body 5 is a device that can keep the circuit breaker contacts tightly closed. The semicircular structure in the middle of the U-shaped push rod 1, the gap between the U-shaped push rod 1 and the circuit breaker spring body 5 is plugged and tightly matched with each other, 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 is provided with a first thread groove, and one or two first nuts 4 are threadedly connected to the first thread 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 is provided with a second thread groove, and the second thread groove is provided with a second thread groove. A positioning ring 6 is provided at one end of the groove close to the first thread groove, and a second nut 7 is threadedly connected to the second thread groove, and the second nut 7 presses the U-shaped push rod 1 against the positioning ring 6; a plurality of limit blocks 8 are evenly provided on the first nut 4 on the side of the first thread groove close to the positioning ring 6 and on the positioning ring 6 along the circumferential direction thereof, and each of the limit blocks 8 and the U-shaped push rod 1 is plugged and matched with each other; an anti-skid washer 9 is provided between the first nut 4 and the U-shaped push rod 1, and an anti-skid washer 9 is also provided between the second nut 7 and the U-shaped push rod 1;The limit block 8 and the U-shaped push rod 1 are plugged into and cooperated with each other, so that the U-shaped push rod 1 will not rotate on the connecting round rod 2, ensuring that the U-shaped push rod 1 will not rotate on the connecting round rod 2 when the circuit breaker spring body 5 is stretched, thereby ensuring the stability of the U-shaped push rod 1 stretching the circuit breaker spring body 5. The U-shaped push rod 1 is tightly installed on the positioning ring 6 through the second nut 7 and the anti-skid washer 9, and the U-shaped push rod 1 can be positioned and installed. When it is necessary to adjust the gap between the two U-shaped push rods 1, the position of the first nut 4 close to one end of the positioning ring 6 is adjusted on the first thread groove, so that the position of the first nut 4 on the first thread groove is determined, and the U-shaped push rod 1 is inserted into the limit block 8 on the limit block 8 of the first nut 4, and then the U-shaped push rod 1 is positioned through another first nut 4 and the anti-skid washer 9, so that the gap between the two U-shaped push rods 1 on the connecting round rod 2 can be adjusted. The two U-shaped push rods 1 can adapt to the gap size of the circuit breaker spring body 5, so that the two U-shaped push rods 1 can be inserted into the gap of the circuit breaker spring body 5. When the two U-shaped push rods 1 are inserted into the gap of the circuit breaker spring body 5, the driving member 3 (the driving member 3 is a device with an output end capable of linear reciprocating motion, preferably a hydraulic cylinder) is started to drive the connecting round rod 2 and the U-shaped push rod 1 to move, so that the connecting round rod 2 and the U-shaped push rod 1 drive the circuit breaker spring body 5 to stretch and move to the required installation height, and then the circuit breaker spring body 5 is installed in the positioning slot through the positioning pin to achieve the installation operation of the circuit breaker spring body 5, so that the circuit breaker spring body 5 can be easily hung successfully, thereby improving the installation efficiency of the circuit breaker spring body 5, without the need for the staff to use a screwdriver or other tools for stretching the circuit breaker spring body 5, and the surface coating on the surface of the circuit breaker spring body 5 will not be damaged, thereby improving the stability of the installation of the circuit breaker spring body 5. ;

[0023] The disadvantage of the prior art is that when installing the circuit breaker spring, the staff needs to stretch the circuit breaker spring. When the circuit breaker spring is in a stretched state, the circuit breaker spring needs to be connected to the positioning slot, and then the positioning pin is inserted into the positioning slot and the connecting hole of the circuit breaker spring to achieve the installation of the circuit breaker spring. When installing the circuit breaker spring, since the circuit breaker spring needs to be installed in a stretched state, the staff has to use a screwdriver to stretch the circuit breaker spring with force, and the installation can be successful only after repeated force application for many times, resulting in low installation efficiency and potential safety hazards. In addition, the surface coating on the surface of the circuit breaker spring will be damaged, and the damaged coating will easily rust. Even if the installation is successful with force, the force on the spring is unstable, which is prone to subsequent quality problems.

[0024] The beneficial effect of this embodiment is that when installing the circuit breaker spring, the worker first adjusts the position of the first nut 4 on the first thread groove, and then adjusts the position of the U-shaped push rod 1 on the connecting round rod 2 through the two first nuts 4. Then the worker connects the connecting round rod 2 and the output end of the driving member 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 spring or the 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 member 3 is started 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 to put it in a stretched state. At this time, the worker can connect the circuit breaker spring body 5 without using a screwdriver to stretch the circuit breaker spring body 5. The circuit breaker spring body 5 is pulled up to the required installation height through the driving member 3, so that the circuit breaker spring body 5 can be easily hung successfully, thereby improving the installation efficiency of the circuit breaker spring body 5.

[0025] In another embodiment provided by the present invention, the two ends of the U-shaped push rod 1 are each provided with an arc groove 10, and an arc clamping plate 11 is slidably installed in each of the two arc grooves 10, and a plurality of first teeth 12 are arranged on the two arc clamping plates 11 along the arc surface track thereof, and the two arc clamping plates 11 and the corresponding arc grooves 10 are each connected by a first elastic member 13; a through hole 14 is provided in the middle of the U-shaped push rod 1, and a driven block 15 is slidably installed in the through hole 14, and the driven block 15 is 5 and the through hole 14 are connected by a second elastic member 16; the driven block 15 and the two arc-shaped clamping plates 11 are connected by a connecting rope 17; a positioning plate 18 is provided at each end of the U-shaped push rod 1, and a positioning shaft 19 is rotatably mounted on each of the two positioning plates 18, and a driven gear 20 is installed in the middle of each of the two positioning shafts 19; the two driven gears 20 are respectively meshed with the corresponding first teeth 12; and a clamping plate 21 is installed on each of the two positioning shafts 19.

[0026] 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 the driven block 15 slides toward one end of the inside of the through hole 14 under the low-level action of the circuit breaker spring body 5, and the driven block 15 squeezes the second elastic member 16 (the second elastic member 16 is an original member capable of telescopic reset, preferably a spring), so that the second elastic member 16 is in a compressed state. Synchronously, the driven block 15 pulls the connecting rope 17 to drive the two arc-shaped clamping plates 11 to slide toward one end of the inside of the arc-shaped groove 10, and the arc-shaped clamping plates 11 squeeze the first elastic member 16. The elastic member 13 (the first elastic member 13 is a component capable of retracting and resetting, preferably a spring) is squeezed to make the first elastic member 13 in a compressed state. Since the first teeth 12 on the arc clamping plate 11 and the driven gear 20 are meshed with each other, the arc clamping plate 11 drives the driven gear 20 to rotate through the first teeth 12, so that the driven gear 20 drives the positioning shaft 19 to rotate, and the positioning shaft 19 drives the clamping plate 21 to rotate toward one end of the circuit breaker spring body 5, so that the two clamping plates 21 synchronously clamp the circuit breaker spring body 5, thereby improving the stability of the tight contact between the U-shaped push rod 1 and the circuit breaker spring body 5, and preventing the U When the U-shaped push rod 1 pushes the circuit breaker spring body 5 to stretch, the abutment position of the U-shaped push rod 1 and the circuit breaker spring body 5 slides, which improves the stability of the U-shaped push rod 1 pushing the circuit breaker spring body 5 to stretch; when the circuit breaker spring body 5 is installed, the circuit breaker spring body 5 is stretched by the positioning pin and the positioning slot, and there is no need for the driving member 3 to provide thrust for the U-shaped push rod 1. Because the gap of the circuit breaker spring body 5 becomes larger when the circuit breaker spring body 5 is in the stretched state, the staff takes the U-shaped push rod 1 out of the gap of the circuit breaker spring body 5. During the process of the second elastic member 16, the second elastic member 16 pushes the driven block 15 to slide toward the outer end of the through hole 14 under the rebound action of the second elastic member 16. Synchronously, under the rebound action of the first elastic member 13, the first elastic member 13 pushes the arc clamping plate 11 to slide toward the outer end of the arc groove 10. The arc 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 staff takes out the U-shaped push rod 1 from the gap of the circuit breaker spring body 5 to facilitate the installation of the circuit breaker spring body 5 next time.

[0027] In another embodiment provided by the present invention, each end of the U-shaped push rod 1 is provided with an abutment mechanism, and the abutment mechanism includes a sliding round rod 22, and each of the two ends of the U-shaped push rod 1 is provided with a groove 23, and a supporting plate 24 is slidably installed in the groove 23, and a semi-circular arc groove 25 is provided on the supporting plate 24, and a receiving groove 26 is provided at the bottom end of the supporting plate 24, and 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, and the sliding round rod 22 and the inner wall of the receiving groove 26 are connected by a first The three elastic members 27 are connected, an oblique through groove 28 is provided in the middle of the sliding round rod 22, two first wedge blocks 29 are symmetrically arranged at the bottom end of the accommodating 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, two ends of the oblique rod 31 are respectively connected to a second wedge block 32, and the two second wedge blocks 32 are both slidably installed in the through groove 30, and the two second wedge blocks 32 are wedge-shapedly matched with their corresponding first wedge blocks 29.

[0028] 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 and the circuit breaker spring body 5 are pressed against each other, 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 there is a certain gap, so that when the U-shaped push rod 1 pushes the circuit breaker spring body 5 to stretch, the circuit breaker spring body 5 is pushed unevenly by the U-shaped push rod 1 (that is, the force on the circuit breaker spring body 5 is uneven when it is stretched), thereby affecting the stability of the U-shaped push rod 1 pushing the circuit breaker spring body 5 to stretch. In this embodiment, the abutment mechanism is provided on the U-shaped push rod 1 to make the force on the U-shaped push rod 1 relatively uniform when it is pushed. When the staff inserts the U-shaped push rod 1 into the gap position 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, so that the semi-circular arc groove 25 on the support plate 24 on one side of the U-shaped push rod 1 abuts against the circuit breaker spring body 5, and there is a certain gap (such as 1 / 4") between the semi-circular arc 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. Figure 7As shown in the figure, during the process of the U-shaped push rod 1 pushing the circuit breaker spring body 5 to perform the stretching operation, under the elastic force of the circuit breaker spring body 5, the support plate 24 on the U-shaped push rod 1 gradually slides toward one end of the inner groove 23. During the process of the support plate 24 moving toward one end of the inner groove 23, the support plate 24 drives the first wedge block 29 to move toward one end of the support rod 39. Since the first wedge block 29 and the second wedge block 32 are mutually wedge-shaped and matched, the first wedge block 29 drives the second wedge block 32 to slide in the through groove 30. Synchronously, the second wedge block 32 drives the inclined rod 31 to slide along the track of the inclined through groove 28, so that the second wedge block 32 drives the sliding round rod 22 to move toward one end of the support plate 24 through the inclined rod 31 and the inclined through groove 28. The movable round rod 22 squeezes the third elastic member 27 (the third elastic member 27 is a component capable of telescopic reset, preferably a spring), so that the third elastic member 27 is in a compressed state. The third elastic member 27 provides support for the supporting plate 24 through the sliding round rod 22, so that the supporting plate 24 can better provide support for the circuit breaker spring body 5. Similarly, after the supporting plate 24 on the other side of the U-shaped push rod 1 and the circuit breaker spring body 5 abut against each other, the supporting plate 24 provides support for the circuit breaker spring body 5 under the push of the third elastic member 27, which can balance the support provided by the U-shaped push rod 1 and the supporting plate 24 on both sides of the circuit breaker spring body 5 to a certain extent, so that the driving force received by the circuit breaker spring body 5 when stretched is more uniform (such as Fig. 9 and Fig.10 As shown in the figure, synchronously, the support rod 39, the inclined rod 31, the sliding round rod 22 and the second wedge block 32 provide supporting force for the first wedge block 29, so that the first wedge block 29 provides supporting force for the supporting plate 24, so that the supporting plate 24 supports the circuit breaker spring body 5 more stably. It can be known by those skilled in the art that by adjusting the inclination angle of the wedge cooperation 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 members 27, the sliding distance of the supporting plate 24 on one side of the U-shaped push rod 1 can be made large while the sliding distance of the supporting plate 24 on the other side of the U-shaped push rod 1 can be made small, and the elastic force provided by the third elastic member 27 to the supporting plate 24 is roughly the same, thereby improving the balance of the thrust provided by the U-shaped push rod 1 to the stretching of the circuit breaker spring body 5, thereby improving the stability of the installation of the circuit breaker spring body 5.

[0029] When the circuit breaker spring body 5 is installed, the staff starts the driving member 3 to drive the U-shaped push rod 1 and the connecting round rod 2 to move. Since the spacing of the circuit breaker spring body 5 after stretching increases, the U-shaped push rod 1 and the supporting plate 24 are separated from the circuit breaker spring body 5. Under the rebound action of the third elastic member 27, the third elastic member 27 pushes the supporting plate 24 to slide toward the outer end of the groove 23. Synchronously, the third elastic member 27 drives the sliding round rod 22 to slide away from the end of the supporting plate 24. The supporting plate 24 pushes the second wedge block 32 to move through the first wedge block 29. The second wedge block 32 drives the sliding round rod 22 to move away from the end of the supporting plate 24 through the oblique rod 31 and the oblique through groove 28, so that the supporting plate 24 returns to a position where it is not in contact with the circuit breaker spring body 5, which facilitates the U-shaped push rod 1 and the supporting plate 24 to provide stretching power for the circuit breaker spring body 5 next time.

[0030] In another embodiment provided by the present invention, each of the support plates 24 is provided with a limiting mechanism, and the limiting mechanism includes a limiting rod 33. A sliding groove 34 is opened on the support plate 24 at the top side of the semicircular arc groove 25, and the sliding groove 34 and the accommodating groove 26 are connected to each other. The limiting rod 33 is slidably installed in the sliding groove 34, and 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 is rotatably connected to the end of the limiting rod 33 away from the semicircular arc groove 25.

[0031] Specifically, when the circuit breaker spring body 5 and the supporting plate 24 abut against each other, and under the elastic force of the circuit breaker spring body 5, the supporting plate 24 slides toward one end of the inner part of the groove 23, because the active rack 35 is fixedly mounted on the support rod 39, the position of the active rack 35 does not change, and the supporting plate 24 drives the passive gear 36 to slide toward one end of the inner part of the groove 23. Since the passive gear 36 and the active rack 35 are meshed with each other, the passive gear 36 drives the telescopic rod 37 (the telescopic rod 37 is a rod capable of adjusting the length, and the length of the telescopic rod 37 will passively change to The telescopic rod 37 and the limiting rod 33 are rotatably connected, so that the length of the telescopic rod 37 changes and the limiting rod 33 is driven to slide along the track of the slide groove 34, so that the telescopic rod 37 drives the limiting rod 33 to slide toward one end of the semi-circular arc groove 25, so that the limiting rod 33 limits the circuit breaker spring body 5 on the outer side of the semi-circular arc groove 25 to prevent the circuit breaker spring body 5 from sliding out of the semi-circular arc groove 25, so that the limiting rod 33 and the semi-circular arc groove 25 are more stable for the U-shaped push rod 1 to push the circuit breaker spring body 5 to perform a stretching operation.

[0032] When the circuit breaker spring body 5 is installed, the staff starts the driving member 3 to drive the U-shaped push rod 1 and the connecting rod 2 to move. Since the spacing of the circuit breaker spring body 5 increases after being stretched, the U-shaped push rod 1 and the supporting plate 24 are separated from the circuit breaker spring body 5. Under the rebound effect of the third elastic member 27, the third elastic member 27 pushes the supporting plate 24 to slide toward the outer end of the groove 23. Synchronously, the supporting plate 24 drives the passive gear 36 to slide toward the outer end of the groove 23, so that the passive gear 36 drives the telescopic rod 3 7 rotates, the telescopic rod 37 drives the limiting rod 33 to slide along the track of the slide groove 34, so that the telescopic rod 37 drives the limiting rod 33 to slide away from the end of the semicircular arc groove 25, so that the limiting rod 33 releases the limiting operation on the circuit breaker spring body 5 on the outer side of the semicircular arc groove 25, so that the limiting rod 33 slides into the slide groove 34, and synchronously, the supporting 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 supporting plate 24 to provide stretching power to the circuit breaker spring body 5 next time.

[0033] In another embodiment provided by the present invention, Fig.11 As shown, the U-shaped push rod 1 is divided into a connecting portion 111 and abutting portion 112, the connecting portion 111 and the connecting round rod 2 are connected to each other, the abutting portion 112 and the circuit breaker spring body 5 are connected, the abutting portion 112 and the connecting portion 111 are rotatably connected to each other, and the abutting portion 112 and the connecting portion 111 are connected to each other through an insert rod 38.

[0034] Specifically, when it is necessary to adjust the abutment position of the limiting mechanism and the abutment mechanism on the U-shaped push rod 1 and the circuit breaker spring body 5, the insertion rod 38 is pulled out from the connecting part 111 and the abutment part 112, and then the abutment part 112 is rotated 180 degrees, and then the insertion rod 38 is inserted into the connecting part 111 and the abutment part 112, so that the insertion rod 38 connects the connecting part 111 and the abutment part 112 to prevent the connecting part 111 and the abutment part 112 from rotating when providing tensile force to the circuit breaker spring body 5. It is known to those skilled in the art that the connection part 111 of the insertion 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.

[0035] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that 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 above 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 installation tool, comprising a U-shaped push rod for stretching a 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 member, the output end of which is connected to a connecting round rod, one end of which is provided with a first thread groove, one or two first nuts are threadedly connected to the first thread groove, a 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 by the position of the two first nuts on the first thread groove.

2. A circuit breaker spring installation tool according to claim 1, characterized in that: A second thread groove is formed at the other end of the connecting round rod, a positioning ring is provided at one end of the second thread groove close to the first thread groove, a second nut is threadedly connected to the second thread groove, and the second nut presses the U-shaped push rod against the positioning ring.

3. A circuit breaker spring installation tool according to claim 1, characterized in that: An arc groove is respectively formed at the two ends of the U-shaped push rod, and an arc clamping plate is slidably installed in each of the two arc grooves. A plurality of first teeth are arranged on the two arc clamping plates along their arc surface tracks, and the two arc clamping plates and the corresponding arc grooves are connected by a first elastic member.

4. A circuit breaker spring installation tool according to claim 3, characterized in that: A through hole is provided in the middle of the U-shaped push rod, a driven block is slidably installed in the through hole, and the driven block and the through hole are connected via a second elastic member.

5. A circuit breaker spring installation tool according to claim 4, characterized in that: The driven block and the two arc-shaped clamping plates are connected via a connecting rope respectively.

6. A circuit breaker spring installation tool according to claim 5, characterized in that: A positioning plate is respectively arranged at the two ends of the U-shaped push rod, a positioning shaft is rotatably mounted on each of the two positioning plates, and a driven gear is respectively mounted at the middle of the two positioning shafts.

7. A circuit breaker spring installation tool according to claim 6, characterized in that: The two driven gears are respectively meshed with the corresponding first teeth.

8. A circuit breaker spring installation tool according to claim 6, characterized in that: A clamping plate is respectively installed on the two positioning shafts.

9. A circuit breaker spring installation tool according to claim 2, characterized in that: A plurality of limit blocks are evenly arranged on the first nut on the side of the first thread groove close to the positioning ring and on the positioning ring along the circumferential direction thereof, and each of the limit blocks and the U-shaped push rod are plugged and matched with each other.

10. A circuit breaker spring installation tool according to claim 2, characterized in that: An anti-skid washer is arranged between the first nut and the U-shaped push rod, and an anti-skid washer is also arranged between the second nut and the U-shaped push rod.

Images