Vacuum circuit breaker driven by lever sliding

Abstract

A vacuum circuit breaker driven by lever sliding comprises a shell, a rotating main shaft and a vacuum arc-extinguishing chamber are arranged in the shell, the rotating main shaft drives the vacuum arc-extinguishing chamber to open and close through a driving structure, and the driving structure comprises a driving lever linked with the rotating main shaft. The driving lever is provided with a rotating center O, an input end A linked with the rotating main shaft and an output end B linked with the vacuum arc-extinguishing chamber, the rotating main shaft drives the input end A of the driving lever to rotate around the rotating center O through rotating action, the output end B is driven to move by utilizing a lever effect, and then the vacuum arc-extinguishing chamber is driven to realize closing and opening actions; and a force arm OA formed by the rotating center O and the input end A is longer than a force arm OB formed by the rotating center O and the output end B.

Description

Technical Field

[0001] The invention relates to a lever sliding driven vacuum circuit breaker, belonging to the field of circuit breakers. Background Art

[0002] The vacuum circuit breaker is named because its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; it has the advantages of small size, light weight, suitable for frequent operation, and no need for maintenance after arc extinguishing, and is widely used in distribution networks.

[0003] For example, a Chinese utility model with publication number CN214254244U discloses a vacuum circuit breaker, characterized in that the transmission mechanism includes: a cam, which is transmission-connected to the rotating main shaft, and a waist-shaped hole is provided on the cam; a linkage shaft, which is inserted into the waist-shaped hole; a pre-tightening cover, a first end of which is fixedly connected to the linkage shaft; a guide shaft, one end of which is fixedly connected to the second end of the pre-tightening cover, and the other end of the guide shaft is connected to the moving end; an elastic member, which is sleeved on the outer wall of the guide shaft, the first end of the elastic member abuts against the second end of the pre-tightening cover, and the second end of the elastic member abuts against the moving end. This structure drives the arc extinguishing chamber through a cam, but the disadvantage of using a cam structure is that: as the breaking current of the circuit breaker increases (the breaking current of the early vacuum circuit breaker is 16kA, and the corresponding contact pressure is about 1000N~1200N. The breaking current increased to 20kA in the later period, and the corresponding contact pressure increased to 1600N~1800N.), the circuit breaker will experience different degrees of opening stagnation, that is, refusal to open during the operation of the power system. Check the condition of the vacuum circuit breaker. As the slide groove of the cam structure that drives the moving contact to move, when it is in the closing position, it is affected by the super strong action of the contact pressure spring, forming a pit at the corresponding position of the slide groove. When the mechanism drives the insulating hexagonal shaft, the pit on the slide groove jams the cam rotation, causing the pull rod to be unable to pull the moving contact to perform a straight line action to open. This has caused a large number of "refusal to open" failures in similar circuit breakers. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a lever-sliding driven vacuum circuit breaker.

[0005] A lever-sliding driven vacuum circuit breaker comprises a housing, wherein a rotating main shaft and a vacuum interrupter are arranged in the housing, wherein the rotating main shaft drives the vacuum interrupter to close and open the switch through a driving structure, wherein the driving structure comprises a driving lever linked with the rotating main shaft, wherein the driving lever is provided with a rotation center O, an input end A linked with the rotating main shaft, and an output end B linked with the vacuum interrupter, wherein the rotating main shaft drives the input end A of the driving lever to rotate around the rotation center O through a rotating action, and drives the output end B to move by lever effect, thereby driving the vacuum interrupter to realize the closing and opening action; the force arm OA formed by the rotation center O and the input end A is longer than the force arm OB formed by the rotation center O and the output end B. In the structure of the present invention, in the closed state, the pressure spring of the vacuum interrupter contact can provide a force value consistent with the opening movement direction. When the circuit breaker operating mechanism is tripped in the opening, the force of the contact pressure spring in the closed state can create a pre-acceleration of the opening when the moving contact performs the opening action. Similarly, in the open state, the driving lever must overcome the closing self-closing force generated by the moving contact of the vacuum interrupter. Therefore, in the initial stage of closing action, the self-closing force of the moving contact can also provide an initial incremental acceleration for the closing speed of the moving contact. The force characteristic state of the vacuum interrupter in the opening and closing states is fully utilized to achieve positive drive, completely eliminating the fault factors that cause the circuit breaker switch to refuse to open or close.

[0006] Preferably, the rotation center O of the driving lever is connected to the guide gantry fixed in the housing, the vacuum interrupter is connected to a driving rod for opening and closing the switch, the other end of the driving rod is connected to the output end B of the driving lever, and the driving structure also includes a driving arm fixed on the rotating main shaft, and the driving arm is connected to the input end A of the driving lever. The rotation center O of the driving lever is connected to the guide gantry fixed in the housing, ensuring the stability of the lever action. The connection between the driving rod and the driving arm further simplifies the structure, reduces the manufacturing difficulty and cost, and improves the convenience of assembly and maintenance.

[0007] Furthermore, the end of the driving lever is provided with a first slide groove for setting the input end A, and the driving arm is rotatably connected to the first slide groove through a first driving pin; the driving lever is provided with a second slide groove for setting the input end B, and the driving rod is connected to the second slide groove through a second driving pin; the driving lever is provided with a third connecting hole for setting the rotation center O, and the guide gantry is rotatably connected to the third connecting hole through a third driving pin. The first slide groove can effectively guide the movement of the first driving pin, optimize the transmission of force, and enable the driving arm to effectively drive the driving lever to rotate to achieve the opening and closing operation. The design of the second slide groove can make the driving rod transmit force more evenly during the movement of the mechanism, reduce the local wear or jamming caused by the concentration of force, and thus improve the switching operation stability of the overall moving contact. The second slide groove can improve the movement efficiency of the driving rod by connecting with the second driving pin, so that it can respond to the control signal faster during the closing and opening process, and reduce mechanical delay. The design of the third connecting hole enables the guide gantry to be more firmly connected to the driving lever, enhances the stability of the entire driving system, and ensures consistent performance under high load or frequent operation.

[0008] Preferably, the first slide groove, the second slide groove and the third connecting hole are arranged in a triangular distribution, and the connecting line between the first slide groove and the third connecting hole is aligned parallel to the long axis of the first slide groove. The triangular distribution design provides a more reasonable mechanical structure, so that when the driving lever moves, the load can be more evenly distributed to each connection point, especially the long axis connecting line between the first slide groove and the third connecting hole is aligned parallel, which effectively reduces the additional wear and structural fatigue caused by uneven force. The triangular distribution configuration helps to ensure that the stress state of each slide groove and connecting hole during operation is more reasonable, which can effectively disperse the load and reduce stress concentration, thereby improving the durability and reliability of the equipment.

[0009] Preferably, the guide gantry is provided with a sliding groove arranged along the opening and closing operation direction of the vacuum interrupter, and the driving rod is slidably connected to the sliding groove through a second driving pin. Guided by the sliding groove, the driving rod can achieve smoother movement, helping the driving rod to remain on the correct guide path, ensuring that the contacts can be accurately closed or opened during the opening and closing operation.

[0010] Furthermore, the sliding groove is in a vertical state, so that the driving lever pushes the driving rod to slide in the sliding groove through a rotational action to perform the opening and closing operations, and the second sliding groove is in a vertical state relative to the sliding groove in the opening state. The setting of the sliding groove and the second sliding groove enables the driving lever to push the driving rod to move up and down in the sliding groove through a rotational action, thereby performing the opening and closing operations.

[0011] Preferably, a fixed bracket is provided at the bottom of the vacuum arc chamber, and a conductive copper contact is provided between the fixed bracket and the vacuum arc chamber; a guide card is provided at the moving end of the vacuum arc chamber. The provision of the conductive copper contact can effectively ensure that the current is smoothly conducted from the vacuum arc chamber to the outside, thereby improving the overall conductivity performance of the equipment. The fixed bracket provides a solid mechanical support for the vacuum arc chamber and enhances the structural stability of the entire equipment.

[0012] Preferably, a soft connection is provided on the top of the vacuum arc extinguishing chamber, and an elastic member abutting against the soft connection is provided on the outer sleeve of the driving rod. A pressing sleeve is connected to the other end of the elastic member, and the pressing sleeve is sleeved on the outside of the driving rod.

[0013] Furthermore, the driving levers are distributed on both sides of the guide gantry, the pressing sleeve is provided with a positioning groove for engaging with the guide gantry, the pressing sleeve is provided with a through hole, and the second driving pin passes through the through hole and is connected with the second slide grooves on the driving levers on both sides. The design of the double-sided configuration of the driving lever allows the movement of the left and right sides to be better coordinated and matched, ensuring the synchronization of various parts during the operation, thereby improving the overall efficiency and accuracy of the system.

[0014] The beneficial effects of the present invention are as follows: The present invention adopts a lever structure, which effectively resolves the traditional four-link drive structure, because the excessive pressure of the contact pressure spring causes a huge operating reaction force on the operating mechanism. At the same time, the excessive contact pressure in the closed state also realizes the corresponding structural stiffness strengthening requirements of the rotating main shaft and the insulating crank arm. The simplification of structural stiffness and the continuation of the traditional four-link transmission method are achieved, ensuring the smooth opening and closing states. The solution to the contact pressure of vacuum circuit breakers with short-circuit currents greater than 25kA is particularly significant, and the problem of jamming in the closing and opening operations is completely eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0016] Figure 1 It is the main structure diagram of the present invention;

[0017] Figure 2 It is a structural diagram of the present invention with part of the outer shell removed;

[0018] Figure 3 It is a partial structural diagram of the present invention;

[0019] Figure 4 for Figure 3 Structural diagram with some structures removed;

[0020] Figure 5 for Figure 4 A magnified detail of the center point A;

[0021] Figure 6 for Figure 4 Structural diagram with some structures removed;

[0022] Figure 7 for Figure 6 A magnified view of the detail at B in the middle;

[0023] Figure 8 The structural diagram of the driving lever;

[0024] Fig. 9 The structural diagram of the guide gantry;

[0025] In the figure, 1. shell; 2. rotating main shaft; 3. vacuum arc extinguishing chamber; 31. driving rod; 32. second driving pin; 33. fixing bracket; 34. conductive copper contact; 35. guide card plate; 36. soft connection; 37. elastic member; 38. pressing sleeve; 381. positioning groove; 382. through hole; 4. driving structure; 41. driving lever; 411. first sliding groove; 412. second sliding groove; 413. third connecting hole; 42. driving arm; 421. first driving pin; 5. guide gantry; 51. third driving pin; 52. sliding groove; 53. fulcrum hole. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0028] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are for explaining and understanding the present invention, but not for limiting the scope of protection of the present invention.

[0029] like Figure 1-9As shown, an embodiment of a lever-sliding driven vacuum circuit breaker of the present invention comprises a housing 1, wherein a rotating main shaft 2 and a vacuum interrupter 3 are arranged in the housing 1, wherein the rotating main shaft 2 drives the vacuum interrupter 3 to close and open the switch through a driving structure 4, wherein the driving structure 4 comprises a driving lever 41 linked with the rotating main shaft 2, wherein the driving lever 41 is provided with a rotation center O, an input end A linked with the rotating main shaft 2, and an output end B linked with the vacuum interrupter 3, wherein the rotating main shaft 2 drives the input end A of the driving lever 41 to rotate around the rotation center O through a rotation action, and drives the output end B to move by lever effect, thereby driving the vacuum interrupter 3 to realize the closing and opening action; the force arm OA formed by the rotating center O and the input end A is longer than the force arm OB formed by the rotating center O and the output end B. In the structure of the present invention, in the closed state, the pressure spring of the contact of the vacuum interrupter 3 can provide a force value consistent with the opening movement direction. When the circuit breaker operating mechanism is tripped in the opening, the force of the contact pressure spring in the closed state can create a pre-acceleration of the opening when the moving contact performs the opening action. Similarly, in the open state, the driving lever 41 must overcome the closing self-closing force generated by the moving contact of the vacuum interrupter 3. Therefore, in the initial stage of the closing action, the self-closing force of the moving contact can also provide an initial incremental acceleration for the closing speed of the moving contact. The force characteristic state of the vacuum interrupter 3 in the open and closed states is fully utilized to achieve positive drive, and completely eliminate the fault factors that cause the circuit breaker switch to refuse to open or close.

[0030] By leveraging the lever effect, the rotation of the rotating main shaft 2 is transmitted to the vacuum interrupter 3 through the driving lever 41, and the difference in the length of the force arm between the input end and the output end is designed (OA>OB). This design can effectively amplify the driving force, so that the moving contact can move quickly during opening and closing, improving the efficiency and reliability of the opening and closing actions. In the closed state, the force of the contact pressure spring of the vacuum interrupter 3 is consistent with the opening direction.

[0031] The rotation center O of the driving lever 41 is connected to the guide gantry 5 fixed in the housing 1, and the vacuum interrupter 3 is connected to the driving rod 31 for opening and closing the switch, and the other end of the driving rod 31 is connected to the output end B of the driving lever 41. The driving structure 4 also includes a driving arm 42 fixed on the rotating main shaft 2, and the driving arm 42 is connected to the input end A of the driving lever 41. The rotation center O of the driving lever 41 is connected to the guide gantry 5 fixed in the housing 1, ensuring the stability of the lever action. The connection between the driving rod 31 and the driving arm 42 further simplifies the structure, reduces the manufacturing difficulty and cost, and improves the convenience of assembly and maintenance.

[0032] The end of the driving lever 41 is provided with a first slide groove 411 for setting the input terminal A, and the driving arm 42 is rotatably connected to the first slide groove 411 through the first driving pin 421; the driving lever 41 is provided with a second slide groove 412 for setting the input terminal B, and the driving rod 31 is connected to the second slide groove 412 through the second driving pin 32; the driving lever 41 is provided with a third connecting hole 413 for setting the rotation center O, and the guide door frame 5 is rotatably connected to the third connecting hole 413 through the third driving pin 51. The first slide groove 411 can effectively guide the movement of the first driving pin 421, optimize the transmission of force, and enable the driving arm 42 to effectively drive the driving lever 41 to rotate to realize the opening and closing operation. The design of the second slide groove 412 can make the driving rod 31 more uniform in the process of mechanism movement, reduce the local wear or jamming caused by the concentration of force, and thus improve the switching operation stability of the overall moving contact. The second slide slot 412 can improve the movement efficiency of the driving rod 31 by connecting with the second driving pin 32, so that it can respond to the control signal more quickly during the closing and opening process and reduce mechanical delay. The design of the third connecting hole 413 enables the guide gantry 5 to be more firmly connected to the driving lever 41, thereby enhancing the stability of the entire driving system and ensuring consistent performance under high load or frequent operation.

[0033] The first slide groove 411, the second slide groove 412 and the third connection hole 413 are arranged in a triangular distribution, and the connection line between the first slide groove 411 and the third connection hole 413 is aligned parallel to the long axis of the first slide groove 411. The triangular distribution design provides a more reasonable mechanical structure, so that when the driving lever 41 moves, the load can be more evenly distributed to each connection point, especially the long axis connection line between the first slide groove 411 and the third connection hole 413 is aligned parallel, which effectively reduces the additional wear and structural fatigue caused by uneven force. The triangular distribution configuration helps to ensure that the stress state of each slide groove and connection hole during operation is more reasonable, which can effectively disperse the load and reduce stress concentration, thereby improving the durability and reliability of the equipment.

[0034] The guide gantry 5 is provided with a sliding groove 52 arranged along the opening and closing operation direction of the vacuum interrupter 3, and the driving rod 31 is slidably connected to the sliding groove 52 through the second driving pin 32. Guided by the sliding groove 52, the driving rod 31 can achieve a more stable movement, helping the driving rod 31 to stay on the correct guide path, ensuring that the contacts can be accurately closed or opened during the opening and closing operation.

[0035] The guide door frame 5 is provided with a fulcrum hole 53, which matches the third connection hole 413 and is rotatably connected with the third driving pin 51. A graphite-lubricated sliding bearing is installed therein.

[0036] The sliding groove 52 is in a vertical state, so that the driving lever 41 pushes the driving rod 31 to slide in the sliding groove 52 through a rotational action to perform the opening and closing operations, and the second sliding groove 412 is in a vertical state relative to the sliding groove 52 in the opening state. The arrangement of the sliding groove 52 and the second sliding groove 412 enables the driving lever 41 to push the driving rod 31 to move up and down in the sliding groove 52 through a rotational action, thereby performing the opening and closing operations.

[0037] A fixing bracket 33 is provided at the bottom of the vacuum interrupter 3, and a conductive copper contact 34 is provided between the fixing bracket 33 and the vacuum interrupter 3; a guide clamp 35 is provided at the moving end of the vacuum interrupter 3. The provision of the conductive copper contact 34 can effectively ensure that the current is smoothly conducted from the vacuum interrupter 3 to the outside, thereby improving the overall conductivity performance of the device. The fixing bracket 33 provides a solid mechanical support for the vacuum interrupter 3, and enhances the structural stability of the entire device.

[0038] The fixing bracket 33 fastens the static conductive end of the arc extinguishing chamber to the conductive copper contact 34 through two nuts to achieve current conduction.

[0039] A soft connection 36 is provided on the top of the vacuum interrupter 3 , and an elastic member 37 abutting against the soft connection 36 is provided on the outer sleeve of the driving rod 31 . A pressing sleeve 38 is connected to the other end of the elastic member 37 , and the pressing sleeve 38 is sleeved on the outside of the driving rod 31 .

[0040] The soft connection 36 is in contact with the moving conductive end of the vacuum interrupter 3 to achieve current conduction at the moving end of the vacuum interrupter 3 .

[0041] The driving levers 41 are distributed on both sides of the guide gantry 5, the pressing sleeve 38 is provided with a positioning groove 381 for engaging with the guide gantry 5, the pressing sleeve 38 is provided with a through hole 382, ​​and the second driving pin 32 passes through the through hole 382 and is connected with the second slide groove 412 on the driving levers 41 on both sides. The design of the double-sided configuration of the driving lever 41 allows the movement of the left and right sides to be better coordinated and matched, ensuring the synchronization of various parts during the operation, thereby improving the overall efficiency and accuracy of the system.

[0042] The opening and closing operations of the vacuum circuit breaker are carried out in the following order:

[0043] 1. Closing operation of the circuit breaker. Facing the front panel of the switch, the operating mechanism of the circuit breaker outputs a clockwise rotation angle, and by rotating the main shaft 2, drives the driving arm 42 to rotate clockwise at an equal angle. When the driving arm 42 rotates, the second driving pin 32 moves in the corresponding slide groove of the driving lever 41, pushing the driving lever 41 to swing downward around the third driving pin 51, driving the lever to push the second driving pin 32. The second driving pin 32 pushes the driving rod 31 downward along the middle slide groove of the guide gantry 5, driving the moving contact of the vacuum interrupter 3 to move downward, so that the moving and static contacts touch first. Then, it continues to move downward, pushing the compression sleeve 38, compressing the contact pressure spring, causing the moving and static contacts to have a certain closing contact pressure after contact. The closing operation of the vacuum circuit breaker is completed.

[0044] 2. When the circuit breaker is opened, it moves in the opposite direction. Facing the front panel of the switch, the operating mechanism of the circuit breaker outputs a counterclockwise rotation angle, and by rotating the main shaft 2, the driving arm 42 is driven to rotate counterclockwise at the same angle. When the driving arm 42 rotates counterclockwise, the second driving pin 32 moves in the corresponding sliding groove of the driving lever 41, pushing the driving lever 41 to swing upward around the third driving pin 51, driving the lever to push the second driving pin 32. The second driving pin 32 pulls up the pressing sleeve 38 along the middle sliding groove 52 of the guide door frame 5, first releasing the contact pressure value of the circuit breaker in the closed state. Then, the second driving pin 32 continues to move upward, pulls up the driving rod 31, drives the moving contact of the vacuum interrupter 3 to move upward, and separates the moving contact from the static contact. And continue to move upward to form an insulation gap between the moving and static contacts. It is required to reach a certain separation distance "opening size requirement" to ensure the required fracture insulation strength of the circuit breaker in the open state. The opening operation of the vacuum circuit breaker is completed.

[0045] In contrast, ABB's vacuum circuit breaker with a similar structure is driven by the rotation of an insulating hexagonal shaft and a cam structure constructed by a slide groove. The slide groove structure based on the cam principle of ABB has a contact pressure in the closed state required by the moving contact of the vacuum arc extinguishing chamber in the open and closed states, and a self-closing force of the moving contact in the open state, and its force direction is perpendicular to the normal line at 90 degrees to the direction of rotation of the cam. The greater the force of the arc extinguishing chamber, the greater the friction resistance torque of the cam rotation caused by the force in the normal direction. Inevitably, the resistance torque will cause the operating mechanism to refuse to open or close. The present invention completely eliminates the formation mechanism of the friction resistance torque and designs a positive energy action trend.

[0046] The driving device involved in the present invention is applied to the field of vacuum circuit breakers, but is not limited to the application of vacuum circuit breakers, and can be extended to all vacuum load switches and vacuum contactors that use vacuum interrupters and other high-voltage electrical appliances.

[0047] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

[0048] Although the invention has been described with reference to several specific embodiments, it should be understood that the invention is not limited to the specific embodiments disclosed. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A lever-sliding driven vacuum circuit breaker, characterized in that: It comprises a shell, in which a rotating main shaft and a vacuum interrupter are arranged, the rotating main shaft drives the vacuum interrupter to close and open the switch through a driving structure, the driving structure comprises a driving lever linked with the rotating main shaft, the driving lever is provided with a rotating center O, an input end A linked with the rotating main shaft, and an output end B linked with the vacuum interrupter, the rotating main shaft drives the input end A of the driving lever to rotate around the rotating center O through a rotating action, drives the output end B to move by utilizing a lever effect, and further drives the vacuum interrupter to realize the closing and opening action; the force arm OA formed by the rotating center O and the input end A is longer than the force arm OB formed by the rotating center O and the output end B.

2. The lever-sliding driven vacuum circuit breaker according to claim 1, characterized in that: The rotation center O of the driving lever is connected to the guide gantry fixed in the outer shell, and the vacuum arc extinguishing chamber is connected to a driving rod for opening and closing the circuit breaker, and the other end of the driving rod is connected to the output end B of the driving lever. The driving structure also includes a driving arm fixed on the rotating main shaft, and the driving arm is connected to the input end A of the driving lever.

3. The lever-sliding driven vacuum circuit breaker according to claim 2, characterized in that: The end of the driving lever is provided with a first sliding groove for setting the input end A, and the driving arm is rotatably connected to the first sliding groove through a first driving pin; the driving lever is provided with a second sliding groove for setting the input end B, and the driving rod is connected to the second sliding groove through a second driving pin; the driving lever is provided with a third connecting hole for setting the rotation center O, and the guide door frame is rotatably connected to the third connecting hole through a third driving pin.

4. The lever-sliding driven vacuum circuit breaker according to claim 3, characterized in that: The first slide groove, the second slide groove and the third connecting hole are arranged in a triangular distribution, and the connecting line between the first slide groove and the third connecting hole is aligned parallel to the long axis of the first slide groove.

5. The lever-sliding driven vacuum circuit breaker according to claim 1, characterized in that: The guide gantry is provided with a sliding groove arranged along the opening and closing operation direction of the vacuum interrupter, and the driving pull rod is slidably connected with the sliding groove through a second driving pin.

6. The lever-sliding driven vacuum circuit breaker according to claim 5, characterized in that: The sliding slot is in a vertical state, so that the driving lever pushes the driving rod to slide in the sliding slot through a rotational action to perform opening and closing operations. The second sliding slot is in a vertical state relative to the sliding slot in the opening state.

7. The lever-sliding driven vacuum circuit breaker according to claim 1, characterized in that: A fixed bracket is provided at the bottom of the vacuum arc extinguishing chamber, and a conductive copper contact is provided between the fixed bracket and the vacuum arc extinguishing chamber; a guide clamping plate is provided at the moving end of the vacuum arc extinguishing chamber.

8. The lever-sliding driven vacuum circuit breaker according to claim 1, characterized in that: A soft connection is provided on the top of the vacuum arc extinguishing chamber, an elastic member abutting against the soft connection is provided on the outer sleeve of the driving rod, a pressing sleeve is connected to the other end of the elastic member, and the pressing sleeve is sleeved on the outside of the driving rod.

9. The lever-sliding driven vacuum circuit breaker according to claim 8, characterized in that: The driving levers are distributed on both sides of the guide gantry, the pressing sleeve is provided with a positioning groove for clamping with the guide gantry, the pressing sleeve is provided with a through hole, and the second driving pin passes through the through hole and is connected with the second sliding grooves on the driving levers on both sides.

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