Closing resistor transmission mechanism and high-voltage circuit breaker

Abstract

The invention relates to a closing resistor transmission mechanism and a high-voltage circuit breaker. The problems that in the prior art, a driving mechanism of a high-voltage circuit breaker is poor in transmission effect, and discharging accidents are likely to happen can be solved. The closing resistor transmission mechanism comprises a transmission case, a crank arm, a first driving piece, a first transmission piece, a second transmission piece, a second driving piece and a pull rod, wherein one end of the crank arm is rotationally connected with the transmission case; one end of the first driving piece is rotationally connected with the first output end of the crank arm, and the other end is rotationally connected with a main fracture moving contact rod; the first transmission part is provided with a first connecting end, a second connecting end and a third connecting end, and the third connecting end is connected with the second output end of the crank arm; one end of the second transmission part is rotationally connected with the transmission box, and the other end is rotationally connected with the first connecting end; one end of the second driving piece is rotationally connected with the second connecting end, and the other end is rotationally connected with the resistor moving contact rod; the pull rod is connected with the input end.

Description

Technical Field

[0001] The present application relates to the technical field of closing resistor transmission mechanisms, and in particular to a closing resistor transmission mechanism and a high-voltage circuit breaker. Background Art

[0002] In order to eliminate and limit overvoltage on the transmission line, current high-voltage circuit breakers usually have a closing resistor in parallel in the main circuit, and are equipped with a set of driving mechanisms to realize the control connection between the main break and the resistor break. The resistor break needs to be closed and opened before the main break. In order to ensure the closing and opening timing of the resistor break and the main break, high-voltage circuit breakers usually use the moving contacts of the main break and the moving contacts of the resistor break to drive through the same set of driving mechanisms.

[0003] In the related art, the aforementioned driving mechanism generally adopts a driving method in which a connecting plate slides in a guide rail or a piston cylinder.

[0004] However, the aforementioned driving mechanism has large sliding friction and lateral force, and is prone to transmission jamming, so the transmission effect is poor, and a large amount of friction metal foreign matter is generated during the friction process, which can easily fall into the circuit breaker housing and cause discharge accidents. Summary of the invention

[0005] Based on this, it is necessary to provide a closing resistor transmission mechanism and a high-voltage circuit breaker to address the problems that the driving mechanism of the high-voltage circuit breaker in the related art has a poor transmission effect and is prone to discharge accidents.

[0006] According to one aspect of the present application, the present application provides a closing resistance transmission mechanism, the closing resistance transmission mechanism comprising:

[0007] Transmission box;

[0008] A crank arm, one end of which is rotatably connected to the transmission box, and the crank arm further comprises an input end, a first output end and a second output end;

[0009] A first driving member, one end of which is rotatably connected to the first output end, and the other end of which is rotatably connected to a main break moving contact rod of a high-voltage circuit breaker;

[0010] A first transmission member, wherein the first transmission member has a first connection end and a second connection end respectively disposed at two ends, and a third connection end disposed between the first connection end and the second connection end, wherein the third connection end is connected to the second output end;

[0011] a second transmission member, one end of which is rotatably connected to the transmission box, and the other end of which is rotatably connected to the first connection end;

[0012] a second driving member, one end of which is rotatably connected to the second connecting end, and the other end of which is used to be rotatably connected to the resistor movable contact rod of the high-voltage circuit breaker;

[0013] A pull rod is connected to the input end and is used to drive the crank arm to rotate relative to the transmission box, and enables the first drive member and the second drive member to respectively drive the main break moving contact rod and the resistance moving contact rod to move synchronously in the same direction.

[0014] The above-mentioned closing resistor transmission mechanism can drive the main break moving contact rod and the resistor moving contact rod to move synchronously in the same direction while driving the crank arm to rotate through the pull rod, so that the resistor break and the main break can be opened and closed by the same set of driving mechanisms. In this way, by designing the movement stroke of the resistor moving contact rod and the main break moving contact rod, the opening and closing timing of the resistor break and the main break can be guaranteed, and the structure is simple and reliable. In addition, the above-mentioned closing resistor transmission mechanism realizes the opening and closing operations of the resistor break and the main break by rotating and connecting each structure and interlocking with each other, which can avoid the friction problem between the structures and improve the transmission effect. At the same time, it can also avoid the generation of friction metal foreign matter, prevent the discharge accident caused by the metal foreign matter falling into the circuit breaker housing, and improve the safety of the closing resistor transmission mechanism.

[0015] In one of the embodiments, the first transmission member is configured as a retractable structure, and the first transmission member can adjust the distance between the first connection end and the second connection end.

[0016] In one embodiment, the first transmission member includes a connecting rod, a first screw rod, a second screw rod and an adjusting nut, and the first screw rod and the second screw rod are respectively telescopically connected to two ends of the connecting rod through the adjusting nut.

[0017] In one embodiment, the closing resistor transmission mechanism includes a first rotating rod and a second rotating rod, the crank arm is rotatably connected to the transmission box via the first rotating rod, the first transmission member is rotatably connected to the second output end via the second rotating rod, and the first rotating rod is arranged in parallel with the second rotating rod.

[0018] In one embodiment, the crank arm includes a first rotating arm, a second rotating arm and a third rotating arm, the first rotating arm is rotatably connected to the transmission box through the first rotating rod, the second rotating arm is extended in a direction parallel to the first rotating rod, the second rotating rod is passed through the second rotating arm, the first transmission member is rotatably connected to one end of the second rotating arm through the second rotating rod, the third rotating arm is connected to the second rotating arm in a direction perpendicular to the second rotating rod, and the first driving member is rotatably connected to one end of the third rotating arm away from the second rotating arm.

[0019] In one embodiment, the first driving member and the first transmission member are both arranged perpendicular to the second rotating rod and are arranged at intervals along the extension direction of the second rotating rod.

[0020] In one embodiment, the second rotating arm is provided with a clamping notch, so that a part of the structure of the second rotating rod is exposed, and the pull rod is sleeved at the clamping notch and rotatably connected to the second rotating rod.

[0021] In one embodiment, the transmission box is provided with a first rotating seat and a second rotating seat, one end of the crank arm is rotatably connected to the first rotating seat, and the second transmission member is rotatably connected to the second rotating seat.

[0022] In one embodiment, the first rotating seat includes a first clamping seat and a second clamping seat, and the first clamping seat and the second clamping seat are respectively used for rotating and clamping two ends of the first rotating rod.

[0023] According to another aspect of the present application, the present application provides a high-voltage circuit breaker, comprising the above-mentioned closing resistance transmission mechanism.

[0024] The above-mentioned high-voltage circuit breaker can drive the main break moving contact rod and the resistor moving contact rod to move synchronously in the same direction while the pull rod of the closing resistor transmission mechanism drives the crank arm to rotate, thereby realizing the opening and closing operations of the resistor break and the main break through the same set of driving mechanisms. In this way, by designing the movement strokes of the resistor moving contact rod and the main break moving contact rod, the opening and closing timing of the resistor break and the main break can be guaranteed, and the structure is simple and reliable. In addition, the various structures of the above-mentioned closing resistor transmission mechanism are rotatably connected and linked to each other to realize the opening and closing operations of the resistor break and the main break, so that the friction problem between the various structures can be avoided, the transmission effect is improved, and at the same time, the generation of friction metal foreign matter can be avoided, and the discharge accident caused by the metal foreign matter falling into the circuit breaker housing is prevented, thereby improving the safety of the closing resistor transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the closing resistance transmission mechanism in one embodiment of the present application.

[0026] Figure 2 for Figure 1 A side view of the closing resistor transmission mechanism is shown.

[0027] Figure 3 Schematic diagram of the structure of the first transmission member of the closing resistance transmission mechanism in one embodiment of the present application.

[0028] Description of Figure Numbers

[0029] 10. Closing resistor transmission mechanism; 20. Main break moving contact rod; 30. Resistor moving contact rod; 100. Transmission box; 110. First rotating seat; 120. Second rotating seat; 200. Crank arm; 201. Input end; 202. First output end; 203. Second output end; 210. First rotating arm; 220. Second rotating arm; 230. Third rotating arm; 231. Clamping notch; 300. First driving member; 400. First transmission member; 401. First connecting end; 402. Second connecting end; 403. Third connecting end; 410. Connecting rod; 420. First screw rod; 430. Second screw rod; 440. Adjusting nut; 500. Second transmission member; 600. Second driving member; 700. Pull rod; 800. First rotating rod; 900. Second rotating rod. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] Considering that the existing high-voltage circuit breaker drive mechanism has large sliding friction and lateral force, it is easy to get stuck, so the transmission effect is poor, and a large amount of friction metal foreign matter will be generated during the friction process, and the metal foreign matter will easily fall into the circuit breaker housing and cause a discharge accident. The present application provides a closing resistor transmission mechanism 10 and a high-voltage circuit breaker, which not only have a good transmission effect, but also do not generate friction metal foreign matter, thereby avoiding discharge accidents, and are easy to apply and promote.

[0037] Specifically, please refer to Figure 1 and Figure 2 An embodiment of the present application provides a closing resistance transmission mechanism 10, which may include a transmission box 100, a crank arm 200, a first driving member 300, a first transmission member 400, a second transmission member 500, a second driving member 600 and a pull rod 700.

[0038] One end of the crank arm 200 is rotatably connected to the transmission box 100. The crank arm 200 also has an input end 201, and the pull rod 700 is connected to the input end 201. The crank arm 200 also has a first output end 202, one end of the first driving member 300 is rotatably connected to the first output end 202, and the other end of the first driving member 300 is used to be rotatably connected to the main break moving contact rod 20 of the high-voltage circuit breaker.

[0039] like Figure 1 Taking the perspective as an example, when the pull rod 700 drives the crank arm 200 to rotate clockwise relative to the transmission box 100, the crank arm 200 can drive the first drive member 300 to move rightward, and then the first drive member 300 can drive the main break moving contact rod 20 to move rightward, thus achieving the closing operation of the main break. Conversely, the pull rod 700 pulls the crank arm 200 to rotate counterclockwise relative to the transmission box 100 to achieve the opening operation of the main break, which will not be repeated here.

[0040] Combination Figure 2 As shown, the crank arm 200 also has a second output end 203. The first transmission member 400 has a first connection end 401 and a second connection end 402 respectively arranged at both ends, and a third connection end 403 arranged between the first connection end 401 and the second connection end 402. The third connection end 403 is connected to the second output end 203. One end of the second transmission member 500 is rotatably connected to the transmission box 100, and the other end of the second transmission member 500 is rotatably connected to the first connection end 401. One end of the second drive member 600 is rotatably connected to the second connection end 402, and the other end of the second drive member 600 is used to be rotatably connected to the resistor movable contact rod 30 of the high-voltage circuit breaker.

[0041] like Figure 1 Taking the perspective as an example, when the pull rod 700 drives the crank arm 200 to rotate clockwise relative to the transmission box 100, since the third connection end 403 is connected to the second output end 203, the crank arm 200 can drive the first transmission member 400 to move rightward as a whole. Further, since one end of the second transmission member 500 is rotationally connected to the transmission box 100, the second transmission member 500 will apply a force in the opposite direction, i.e., to the left, to the first transmission member 400, thereby driving the first transmission member 400 to rotate counterclockwise around the second output end 203 while the overall structure moves to the right, and finally the second connection end 402 of the first transmission member 400 can move rightward under the action of the counterclockwise rotation and drive the resistor moving contact rod 30 to move rightward, thereby realizing the closing operation of the resistor break. Conversely, the pull rod 700 pulls the crank arm 200 to rotate counterclockwise relative to the transmission box 100 to realize the opening operation of the resistor break, which will not be repeated here.

[0042] The above-mentioned closing resistor transmission mechanism 10 can drive the main break moving contact rod 20 and the resistor moving contact rod 30 to move synchronously in the same direction while driving the crank arm 200 to rotate through the pull rod 700, so that the resistor break and the main break can be opened and closed by the same set of driving mechanisms. In this way, by designing the movement stroke of the resistor moving contact rod 30 and the main break moving contact rod 20, the opening and closing timing of the resistor break and the main break can be guaranteed, and the structure is simple and reliable. In addition, the above-mentioned closing resistor transmission mechanism 10 realizes the opening and closing operations of the resistor break and the main break by rotating and connecting each structure and interlocking with each other, so that the friction problem between the structures can be avoided, the transmission effect is improved, and at the same time, the generation of friction metal foreign matter can be avoided, and the discharge accident caused by the metal foreign matter falling into the circuit breaker housing is prevented, thereby improving the safety of the closing resistor transmission mechanism 10.

[0043] It is worth noting that the above-mentioned closing resistor transmission mechanism 10 is rotatably connected to the transmission box 100 through one end of the second transmission member 500, and the other end of the second transmission member 500 is rotatably connected to the first connection end 401. In this way, when the second transmission member 500 applies a force in the opposite direction, i.e., a force to the left, to the first transmission member 400, the second transmission member 500 can rotate relative to the transmission box 100, which helps to decompose the axial impact force along the movement direction of the pull rod 700 received by the second transmission member 500, thereby improving the transmission efficiency and transmission stability.

[0044] Optionally, the first driving member 300 , the first transmission member 400 , the second transmission member 500 , the second driving member 600 and the pull rod 700 may be, but are not limited to, configured as rods.

[0045] Optionally, combined Figure 2 As shown, the closing resistor transmission mechanism 10 may include a first rotating rod 800 and a second rotating rod 900, the crank arm 200 is rotatably connected to the transmission box 100 through the first rotating rod 800, and the first transmission member 400 is rotatably connected to the second output terminal 203 through the second rotating rod 900, wherein the second rotating rod 900 can be, but is not limited to, used as an installation base for the first transmission member 400, and can also be used as a rotation base for the first transmission member 400, so that when the pull rod 700 drives the crank arm 200 to rotate, the first transmission member 400 can perform translational and rotation operations, thereby realizing the closing and opening operations of the resistor break, and the structural setting is simple and reliable.

[0046] Optionally, combined Figure 2As shown, the crank arm 200 may include a first rotating arm 210, a second rotating arm 220 and a third rotating arm 230. The first rotating arm 210 is rotatably connected to the transmission box 100 through the first rotating rod 800, the second rotating arm 220 is extended in a direction parallel to the first rotating rod 800, the second rotating rod 900 is passed through the second rotating arm 220, and the first rotating rod 800 is parallel to the second rotating rod 900. The first transmission member 400 is rotatably connected to one end of the second rotating arm 220 through the second rotating rod 900, the third rotating arm 230 is connected to the second rotating arm 220 in a direction perpendicular to the second rotating rod 900, and the first driving member 300 is rotatably connected to one end of the third rotating arm 230 away from the second rotating arm 220.

[0047] It is worth noting that the first rotating arm 210, the second rotating arm 220 and the third rotating arm 230 can be, but are not limited to, integrally formed, so that the structural strength of the crank arm 200 can be improved. In addition, the second rotating arm 220 is extended in a direction parallel to the first rotating rod 800, the second rotating rod 900 is inserted into the second rotating arm 220, and the first rotating rod 800 and the second rotating rod 900 are arranged in parallel, so as to help ensure the rotation consistency of the crank arm 200 and the first transmission member 400, that is, the crank arm 200 and the first transmission member 400 can both rotate in a plane direction perpendicular to the first rotating rod 800, and then the main break moving contact rod 20 and the resistance moving contact rod 30 can both be forced and driven in a plane direction perpendicular to the first rotating rod 800, reducing the movement angle deviation of the main break moving contact rod 20 and the resistance moving contact rod 30, and then reducing the problem of movement jamming, and improving the movement smoothness of the main break moving contact rod 20 and the resistance moving contact rod 30.

[0048] Optionally, the transmission box 100 is provided with a first rotating seat 110 and a second rotating seat 120, one end of the crank arm 200 is rotatably connected to the first rotating seat 110, and the second transmission member 500 is rotatably connected to the second rotating seat 120, so as to improve the stability of the rotational connection between the crank arm 200 and the second transmission member 500 and the transmission box 100.

[0049] Optionally, the first rotating seat 110 and the second rotating seat 120 can be, but are not limited to, set as a protruding structure on the inner wall of the transmission box 100. Among them, the first rotating seat 110 can be, but are not limited to, set to include a first clamping seat and a second clamping seat, and the first clamping seat and the second clamping seat are respectively used for the two ends of the first rotating rod 800 to be rotated and clamped. It should be noted that the crank arm 200 is also a driving member of the first driving member 300 and the first transmission member 400. The crank arm 200 needs to withstand a large force during the process of pushing or pulling the pull rod 700. Therefore, the first clamping seat and the second clamping seat are respectively used for the two ends of the first rotating rod 800 to be rotated and clamped. The stability of the rotation of the crank arm 200 around the first rotating rod 800 can be improved, thereby improving the mechanical life and transmission stability of the closing resistor transmission mechanism 10.

[0050] Optionally, combined Figure 2 As shown, the first driving member 300 and the first transmission member 400 are both arranged perpendicularly to the second rotating rod 900, and are arranged at intervals along the extension direction of the second rotating rod 900. In this way, the first driving member 300 and the first transmission member 400 can be spaced apart along the extension direction of the second rotating rod 900, and then the main break mechanism and the resistance break mechanism can also be spaced apart along the extension direction of the second rotating rod 900. In this way, the structural arrangement of the main break and the resistance break is optimized, the overall size of the closing resistance transmission mechanism 10 is reduced, and the structural compactness of the closing resistance transmission mechanism 10 is improved.

[0051] Optionally, combined Figure 2 As shown, the second rotating arm 220 is provided with a snap-in notch 231, so that part of the structure of the second rotating rod 900 is exposed, and the pull rod 700 is sleeved on the snap-in notch 231 and rotatably connected to the second rotating rod 900. In this way, when the pull rod 700 pushes or pulls the second rotating rod 900 to move forward and backward, the second rotating rod 900 can drive the crank arm 200 to rotate around the first rotating seat 110, and the structure is simple and reliable.

[0052] It is worth noting that the above-mentioned engaging notch 231 can be set at any position of the second rotating arm 220 along the extending direction of the second rotating arm 220. Figure 2 As shown, the engaging notch 231 can be set on the left side of the third rotating arm 230, and similarly, the engaging notch 231 can also be set on the right side of the third rotating arm 230. It can be understood that the pull rod 700 only needs to realize the driving effect of rotating the crank arm 200, so the setting position of the engaging notch 231 is not limited here. More specifically, the setting position of the engaging notch 231 can be determined according to the setting position of the pull rod 700.

[0053] Combination Figure 2 As shown, the first transmission member 400 is configured as a retractable structure, and the first transmission member 400 can adjust the distance between the first connection end 401 and the second connection end 402. By changing the distance between the first connection end 401 and the second connection end 402, the stroke of the resistor moving contact rod 30 is changed. This can meet the requirements of different power grids for the pre-investment time of the closing resistor, thereby improving the applicability of the closing resistor transmission mechanism 10.

[0054] It is worth noting that the stroke of the resistance moving contact rod 30 can be changed by changing the distance between the first connection end 401 and the second output end 203 , or by changing the distance between the second connection end 402 and the second output end 203 .

[0055] For example, if the distance between the first connection end 401 and the second output end 203 is changed, the distance between the second connection end 402 and the second output end 203 remains unchanged. Since the rotation radius of the first connection end 401 relative to the second output end 203 is changed, the stroke of the first connection end 401 can be changed. Since the first connection end 401 and the second connection end 402 are respectively located at the two ends of the first transmission member 400, the stroke of the second connection end 402 will change with the change of the stroke of the first connection end 401, thereby achieving the change of the stroke of the resistance moving contact rod 30.

[0056] For example, if the distance between the first connection end 401 and the second connection end 402 remains unchanged, and the distance between the second connection end 402 and the second output end 203 is changed, since the rotation radius of the first connection end 401 relative to the second output end 203 remains unchanged, but the rotation radius of the second connection end 402 relative to the second output end 203 is changed, the stroke of the second connection end 402 will change, thereby achieving the change of the stroke of the resistance moving contact rod 30.

[0057] Optionally, the first transmission member 400 may be, but is not limited to, implemented as a telescopic rod, and the aforementioned telescopic rod may be, but is not limited to, implemented in a form of a clip connection or a threaded connection to achieve a telescopic function.

[0058] Optionally, combined Figure 3 As shown, the first transmission member 400 may include a connecting rod 410, a first screw rod 420, a second screw rod 430 and an adjusting nut 440. The first screw rod 420 and the second screw rod 430 are respectively telescopically connected to the two ends of the connecting rod 410 through the adjusting nut 440. When it is necessary to adjust the distance between the first connecting end 401 and the second connecting end 402, it is only necessary to twist the adjusting nut 440. The operation is simple and convenient.

[0059] According to another aspect of the present application, the present application provides a high-voltage circuit breaker, comprising the above-mentioned closing resistance transmission mechanism 10.

[0060] The above-mentioned high-voltage circuit breaker can drive the main break moving contact rod 20 and the resistance moving contact rod 30 to move synchronously in the same direction while driving the crank arm 200 to rotate through the pull rod 700 of the closing resistor transmission mechanism 10, so that the resistance break and the main break can be opened and closed by the same set of driving mechanisms. In this way, by designing the movement stroke of the resistance moving contact rod 30 and the main break moving contact rod 20, the opening and closing timing of the resistance break and the main break can be guaranteed, and the structure is simple and reliable. In addition, the various structures of the above-mentioned closing resistor transmission mechanism 10 are rotatably connected and linked to each other to realize the opening and closing operations of the resistance break and the main break, so that the friction problem between the various structures can be avoided, the transmission effect is improved, and at the same time, the generation of friction metal foreign matter can be avoided, and the discharge accident caused by the metal foreign matter falling into the circuit breaker housing is prevented, thereby improving the safety of the closing resistor transmission mechanism 10.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A closing resistor transmission mechanism, characterized in that: The closing resistance transmission mechanism comprises: Transmission box; A crank arm, one end of which is rotatably connected to the transmission box, and the crank arm further comprises an input end, a first output end and a second output end; A first driving member, one end of which is rotatably connected to the first output end, and the other end of which is rotatably connected to a main break moving contact rod of a high-voltage circuit breaker; A first transmission member, wherein the first transmission member has a first connection end and a second connection end respectively disposed at two ends, and a third connection end disposed between the first connection end and the second connection end, wherein the third connection end is connected to the second output end; a second transmission member, one end of which is rotatably connected to the transmission box, and the other end of which is rotatably connected to the first connection end; a second driving member, one end of which is rotatably connected to the second connecting end, and the other end of which is used to be rotatably connected to the resistor movable contact rod of the high-voltage circuit breaker; A pull rod is connected to the input end and is used to drive the crank arm to rotate relative to the transmission box, and enables the first drive member and the second drive member to respectively drive the main break moving contact rod and the resistance moving contact rod to move synchronously in the same direction.

2. The closing resistor transmission mechanism according to claim 1, characterized in that: The first transmission member is configured as a retractable structure, and the first transmission member can adjust the distance between the first connection end and the second connection end.

3. The closing resistor transmission mechanism according to claim 2, characterized in that: The first transmission member includes a connecting rod, a first screw rod, a second screw rod and an adjusting nut. The first screw rod and the second screw rod are respectively telescopically connected to two ends of the connecting rod through the adjusting nut.

4. The closing resistor transmission mechanism according to claim 1, characterized in that: The closing resistor transmission mechanism includes a first rotating rod and a second rotating rod, the crank arm is rotatably connected to the transmission box via the first rotating rod, the first transmission member is rotatably connected to the second output end via the second rotating rod, and the first rotating rod is arranged in parallel with the second rotating rod.

5. The closing resistor transmission mechanism according to claim 4, characterized in that: The crank arm includes a first rotating arm, a second rotating arm and a third rotating arm. The first rotating arm is rotatably connected to the transmission box through the first rotating rod. The second rotating arm is extended in a direction parallel to the first rotating rod. The second rotating rod is passed through the second rotating arm. The first transmission member is rotatably connected to one end of the second rotating arm through the second rotating rod. The third rotating arm is connected to the second rotating arm in a direction perpendicular to the second rotating rod. The first driving member is rotatably connected to one end of the third rotating arm away from the second rotating arm.

6. The closing resistor transmission mechanism according to claim 5, characterized in that: The first driving member and the first transmission member are both arranged perpendicular to the second rotating rod and are arranged at intervals along the extending direction of the second rotating rod.

7. The closing resistor transmission mechanism according to claim 5, characterized in that: The second rotating arm is provided with a clamping notch, so that a part of the structure of the second rotating rod is exposed, and the pull rod is sleeved at the clamping notch and rotatably connected to the second rotating rod.

8. The closing resistor transmission mechanism according to claim 4, characterized in that: The transmission box is provided with a first rotating seat and a second rotating seat, one end of the crank arm is rotatably connected to the first rotating seat, and the second transmission member is rotatably connected to the second rotating seat.

9. The closing resistor transmission mechanism according to claim 8, characterized in that: The first rotating seat includes a first clamping seat and a second clamping seat, and the first clamping seat and the second clamping seat are respectively used for rotating and clamping two ends of the first rotating rod.

10. A high voltage circuit breaker, characterized in that: It comprises the closing resistance transmission mechanism as described in any one of claims 1 to 9.

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