A transmission mechanism capable of adjusting the length of a force arm and a high-voltage isolating switch

Abstract

The present invention discloses a transmission mechanism with adjustable lever arm length and a high-voltage disconnector, the transmission mechanism includes a crank arm, a pull rod and a locking mechanism, one end of the crank arm is sequentially provided with a plurality of first teeth along its length direction, a tooth plate is rotatably provided on the pull rod, a plurality of second teeth are provided on the tooth plate, the second teeth can mesh with different first teeth, and the locking mechanism is used to keep the second teeth in meshing state with the corresponding first teeth. According to the transmission mechanism with adjustable lever arm length and the high-voltage disconnector of the embodiment of the present invention, the distance from the connection point between the crank arm and the pull rod to the rotation center of the crank arm can be adjusted, and then the lever arm length of the force applied by the pull rod to each crank arm can be made consistent, so that the three crank arms can rotate synchronously, and then the three moving contacts can rotate synchronously, and finally the three switch assemblies can be opened and closed at the same time, and the safety performance of the high-voltage disconnector is improved.

Description

Technical Field

[0001] The invention relates to an isolating switch, in particular to a transmission mechanism capable of adjusting the length of a force arm and a high-voltage isolating switch. Background Art

[0002] High-voltage disconnectors are important switchgear in the electrical systems of power plants and substations, including a support frame and three switch assemblies arranged on the support frame. The switch assemblies include a static insulating column arranged on the support frame, a static contact arranged on the static insulating column, a moving insulating column rotatably arranged on the support frame, and a moving contact arranged on the moving insulating column. The moving insulating column is connected with a crank arm. The crank arms on the three switch assemblies are all connected to the same pull rod. The pull rod drives the three crank arms to rotate, and the three crank arms in turn drive the corresponding moving insulating columns to rotate. The three moving insulating columns in turn drive the corresponding moving contacts to rotate, thereby achieving the three moving contacts to contact the corresponding static contacts at the same time or to separate from the corresponding static contacts, thereby achieving the simultaneous opening and closing of the three switch assemblies.

[0003] However, due to manufacturing errors and installation errors, the distances between the connection points of the crank arms and the pull rods and the rotation centers of the crank arms in the three switch assemblies are not consistent, which leads to inconsistent lengths of the force arms applied by the pull rods to each crank arm, causing the three crank arms to be unable to rotate synchronously, and the three moving contacts to be unable to rotate synchronously, resulting in the three switch assemblies being unable to open and close at the same time. The inability to open and close at the same time will seriously endanger the safety performance of the high-voltage disconnector. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first embodiment of the present invention provides a transmission mechanism with adjustable lever arm length, which can adjust the distance from the connection point between the crank arm and the pull rod to the rotation center of the crank arm, and further adjust the lever arm length when the pull rod applies force to the crank arm.

[0005] In addition, the second embodiment of the present invention provides a high-voltage disconnector provided with the above-mentioned transmission mechanism with adjustable lever arm length.

[0006] The transmission mechanism with adjustable lever arm length according to the first aspect of the present invention comprises:

[0007] A crank arm, wherein one end of the crank arm is provided with a plurality of first teeth in sequence along its length direction;

[0008] A pull rod, wherein a tooth plate is rotatably provided on the pull rod, and a plurality of second teeth are provided on the tooth plate, and the second teeth can mesh with different first teeth;

[0009] A locking mechanism is used to keep the second tooth in meshing state with the corresponding first tooth.

[0010] According to the transmission mechanism of the embodiment of the first aspect of the present invention, the length of the lever arm can be adjusted, and at least the following technical effects are achieved: one end of the crank arm away from the first tooth is connected to the moving insulating column on the high-voltage disconnector and drives the moving insulating column to rotate together, and the other end is connected to the pull rod through the meshing of the first tooth and the second tooth. When the distances from the connection points of the crank arms and the pull rod to the rotation center of the crank arms in the three switch assemblies of the high-voltage disconnector are inconsistent, which leads to the lengths of the lever arms of the forces applied by the pull rod to each crank arm being inconsistent, so that the three crank arms cannot rotate synchronously, and the three moving contacts cannot rotate synchronously, so that the three switch assemblies cannot be opened and closed simultaneously. The transmission mechanism of the embodiment of the present invention can adjust the distance from the connection point of the crank arm and the pull rod to the rotation center of the crank arm. Specifically, when it is necessary to adjust the distance from the connection point of the crank arm and the pull rod to the rotation center of the crank arm, the locking mechanism is released to separate the second tooth from the corresponding first tooth, that is, to separate the crank arm from the tooth plate on the pull rod, and then the pull rod is adjusted to make the second tooth on the tooth plate mesh with the first tooth at other positions on the crank arm, and then the locking mechanism is locked. Since the first teeth are arranged in sequence along the length direction of the crank arm, the second teeth mesh with different first teeth to adjust the distance from the tooth plate to the rotation center of the crank arm, that is, to adjust the distance from the connection point of the crank arm and the pull rod to the rotation center of the crank arm, and then the length of the lever arm when the pull rod applies a force to the crank arm can be adjusted, so that the lever arm length of the force applied by the pull rod to each crank arm in the three switch assemblies is consistent, so that the three crank arms can rotate synchronously, and then the three moving contacts can rotate synchronously, and finally the three switch assemblies can be opened and closed synchronously, and the safety performance of the high-voltage disconnector is improved. At the same time, when the transmission mechanism of the adjustable lever arm length of the embodiment of the present invention needs to adjust the distance from the connection point of the crank arm and the pull rod to the rotation center of the crank arm, the locking mechanism is released, and then the second tooth is meshed with the corresponding first tooth, and then the locking mechanism is locked, which is simple to operate and saves time and effort. In addition, the second tooth is meshed with different first teeth to make the adjustment, and the adjustment is very accurate, so that the synchronization of the high-voltage disconnector can be accurately adjusted.

[0011] According to some embodiments of the present invention, a first mounting hole is provided on the tooth plate and passes through the first mounting hole and the crank arm is correspondingly provided with a second mounting hole. The locking mechanism is provided with an axle pin, and one end of the axle pin passes through the first mounting hole and the second mounting hole in sequence and is threadedly connected with a locking nut.

[0012] According to some embodiments of the present invention, two opposite sides of the second mounting hole extend along the length direction of the crank arm, and the shaft pin is slidably disposed in the second mounting hole along the length direction of the crank arm.

[0013] According to some embodiments of the present invention, the tooth plate is detachably disposed on the pull rod.

[0014] According to some embodiments of the present invention, a third mounting hole extending vertically through the pull rod is provided corresponding to the first mounting hole, and the shaft pin passes through the third mounting hole.

[0015] According to some embodiments of the present invention, a sleeve is installed between the third mounting hole and the shaft pin.

[0016] According to some embodiments of the present invention, the pull rod is provided with a U-shaped frame, the third mounting hole is provided on the U-shaped frame, and an end of the crank arm close to the tooth plate and the tooth plate are both cooperatively mounted in the U-shaped frame.

[0017] According to some embodiments of the present invention, an elastic pad is provided between the crank arm and the inner wall of the U-shaped frame, and the elastic pad is sleeved outside the axle pin.

[0018] According to some embodiments of the present invention, the first tooth is arranged on the upper end surface of the crank arm, and the tooth plate is correspondingly arranged above the crank arm.

[0019] The high-voltage disconnector according to the second embodiment of the present invention is provided with a transmission mechanism with adjustable lever arm length according to the first embodiment of the present invention.

[0020] The high-voltage disconnector according to the embodiment of the second aspect of the present invention has at least the following technical effects: the high-voltage disconnector is provided with a transmission mechanism with adjustable lever arm length according to the embodiment of the first aspect of the present invention, which can make the lever arm lengths of the force applied by the pull rod to each crank arm consistent, so that the three crank arms can rotate synchronously, and then the three moving contacts can rotate synchronously, and finally the three switch components can be opened and closed simultaneously, so that the safety performance of the high-voltage disconnector is improved.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 An exploded view of the present invention;

[0025] Figure 3 This is one of the perspective views of the present invention;

[0026] Figure 4A partial cross-sectional view of the present invention;

[0027] Figure 5 for Figure 2 A partial enlarged view at point A;

[0028] Figure 6 It is a schematic diagram of the local structure of the high-voltage disconnector;

[0029] Reference numerals:

[0030] Crank arm 100, first tooth 101, second mounting hole 102, flange 103; pull rod 200, third mounting hole 201, U-shaped frame 202; tooth plate 300, second tooth 301, first mounting hole 302; locking mechanism 400, axle pin 401, locking nut 402, sleeve 403, elastic pad 404, gasket 405; mounting frame 500, static insulating column 501, dynamic insulating column 502, connecting shaft 503. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Reference below Figures 1 to 6 The invention describes a transmission mechanism with adjustable lever arm length and a high-voltage disconnect switch according to an embodiment of the invention.

[0035] According to the transmission mechanism with adjustable lever arm length in the first aspect of the present invention, Figures 1 to 6 As shown, it includes a crank arm 100, a pull rod 200 and a locking mechanism 400. One end of the crank arm 100 is sequentially provided with a plurality of first teeth 101 along its length direction. A tooth plate 300 is rotatably provided on the pull rod 200. A plurality of second teeth 301 are provided on the tooth plate 300. The second teeth 301 can mesh with different first teeth 101. The locking mechanism 400 is used to keep the second teeth 301 in a meshing state with the corresponding first teeth 101.

[0036] In this embodiment, one end of the crank arm 100 away from the first tooth 101 is connected to the moving insulating column 502 on the high-voltage disconnector and drives the moving insulating column 502 to rotate together, and the other end is connected to the pull rod 200 through the meshing of the first tooth 101 and the second tooth 301. When the distances from the connection points of each crank arm 100 and the pull rod 200 to the rotation center of the crank arm 100 are inconsistent in the three switch components of the high-voltage disconnector, the force arm lengths of the force applied by the pull rod 200 to each crank arm 100 are inconsistent, and when the pull rod 200 moves a set length in a direction close to its own length, the rotation angles of the three crank arms 100 are inconsistent, that is, the three crank arms 100 cannot rotate synchronously, and the three moving insulating columns 502 cannot rotate synchronously, and the three moving contacts cannot rotate synchronously, so that the three moving contacts cannot contact the corresponding static contacts at the same time or separate from the corresponding static contacts, and finally the three switch components cannot be opened and closed at the same time. The transmission mechanism with adjustable lever arm length in the embodiment of the present invention can adjust the distance from the connection point between the crank arm 100 and the pull rod 200 to the rotation center of the crank arm 100. Specifically, when it is necessary to adjust the distance from the connection point between the crank arm 100 and the pull rod 200 to the rotation center of the crank arm 100, release the locking mechanism 400 to separate the second tooth 301 from the corresponding first tooth 101, that is, separate the crank arm 100 from the tooth plate 300 on the pull rod 200, then adjust the pull rod 200 so that the second tooth 301 on the tooth plate 300 engages with the first tooth 101 at other positions on the crank arm 100, and then lock the locking mechanism 400. Since the first teeth 101 are arranged in sequence along the length direction of the crank arm 100, the engagement of the second teeth 301 with different first teeth 101 can adjust the distance from the tooth plate 300 to the rotation center of the crank arm 100, that is, the distance from the connection point between the crank arm 100 and the pull rod 200 to the rotation center of the crank arm 100 can be adjusted, and the length of the force arm when the pull rod 200 applies a force to the crank arm 100 can be adjusted, so that in the three switch components of the high-voltage disconnector, the length of the force arm of the force applied by the pull rod 200 to each crank arm 100 is consistent, so that the three crank arms 100 can rotate synchronously, and then the three moving insulating columns 502 can rotate synchronously, and then the three moving contacts can rotate synchronously, and then the three moving contacts can contact or separate with the corresponding static contacts at the same time, and finally the three switch components can be opened and closed at the same time, so that the safety performance of the high-voltage disconnector is improved. At the same time, when the transmission mechanism of the embodiment of the present invention with adjustable lever arm length needs to adjust the distance from the connection point of the crank arm 100 and the pull rod 200 to the rotation center of the crank arm 100, the locking mechanism 400 is released, and then the second tooth 301 is meshed with the corresponding first tooth 101, and then the locking mechanism 400 is locked, which is simple to operate and saves time and effort. In addition, the present embodiment is adjusted by meshing the second tooth 301 with different first teeth 101, and the adjustment is very accurate, thereby being able to accurately adjust the synchronization of the high-voltage disconnector.

[0037] It should be noted that the first teeth 101 are arranged in sequence along the length direction of the crank arm 100. The first teeth 101 can be arranged on the upper end face or the lower end face of the crank arm 100. Correspondingly, the second teeth 301 can be arranged on the lower end face or the upper end face of the tooth plate 300, so that the end faces of the crank arm 100 and the tooth plate 300 that are close to each other can mesh. The pitch of the first teeth 101 and the second teeth 301 can be set to different values ​​according to actual needs. The smaller the pitch, the more accurate the adjustment. The first teeth 101 can be arranged horizontally and its own length direction is perpendicular to the length direction of the crank arm 100. The first teeth 101 can also be arranged horizontally and its own length direction is inclined relative to the length direction of the crank arm 100. It is only necessary that all the first teeth 101 are arranged in sequence along the length direction of the crank arm 100. The end of the crank arm 100 away from the first tooth 101 and the movable insulating column 502 on the high-voltage disconnector can be welded or detachably connected. For example, the end of the crank arm 100 away from the first tooth 101 can be provided with a flange 103, and correspondingly, the movable insulating column 502 is also provided with a flange 103. The crank arm 100 and the movable insulating column 502 are connected through two flanges 103, and the flange 103 is coaxial with the movable insulating column 502, so that the crank arm 100 can rotate coaxially with the movable insulating column 502, and the movable insulating column 502 is generally arranged vertically, so that the crank arm 100 can rotate with the moving insulating column 502 around the vertical axis, and the tooth plate 300 is rotatably arranged on the pull rod 200, and the rotation axis of the tooth plate 300 can be parallel to the rotation axis of the crank arm 100, that is, the tooth plate 300 is rotatably arranged on the pull rod 200 around the axis in the vertical direction, and then the pull rod 200 drives the crank arm 100 to rotate, and the angle between the pull rod 200 and the crank arm 100 can be adjusted, so that the pull rod 200 and the crank arm 100 will not interfere with each other. In addition, the synchronous rotation mentioned in this embodiment refers to the same rotation angle in the same time, rather than simultaneous rotation. Taking the crank arm 100 as an example, when the pull rod 200 moves, the three crank arms 100 all rotate, but the rotation angles in the same time are not necessarily the same.

[0038] In some embodiments of the present invention, Figure 2 , Figure 4 and Figure 5As shown, the tooth plate 300 is provided with a first mounting hole 302 that runs through from top to bottom, the crank arm 100 is correspondingly provided with a second mounting hole 102, and the locking mechanism 400 is provided with an axle pin 401, one end of which passes through the first mounting hole 302 and the second mounting hole 102 in sequence and is threadedly connected with a locking nut 402. One end of the axle pin 401 may be provided with a nut, and the other end may be provided with an external thread. When the second tooth 301 is engaged with the corresponding first tooth 101, the first mounting hole 302 and the second mounting hole 102 are aligned, and then the end of the axle pin 401 with the external thread passes through the first mounting hole 302 and the second mounting hole 102 in sequence, and then the locking nut 402 is put on and tightened to lock the second tooth 301 and the corresponding first tooth 101 in the meshing state, which is simple to operate and saves time and effort. It should be noted that the locking mechanism 400 can also be a U-shaped clamp. For example, when the tooth plate 300 is located above the crank arm 100, when the second tooth 301 is meshed with the corresponding first tooth 101, the U-shaped clamp clamps the upper end surface of the tooth plate 300 and the lower end surface of the crank arm 100 respectively, thereby keeping the second tooth 301 in a meshed state with the corresponding first tooth 101. In addition, the locking mechanism 400 can also be a fastening belt similar to a belt structure. Anti-skid grooves are correspondingly provided on the outer walls of the tooth plate 300 and the crank arm 100 that are separated from each other, and then the fastening belt is installed in the anti-skid groove, and then the fastening belt is tightened and locked, so that the fastening belt is tightly attached to the tooth plate 300 and the crank arm 100, which can also keep the second tooth 301 in a meshed state with the corresponding first tooth 101.

[0039] In some embodiments of the present invention, Figure 5 As shown, the two opposite sides of the second mounting hole 102 extend along the length direction of the crank arm 100, and the shaft pin 401 is slidably arranged in the second mounting hole 102 along the length direction of the crank arm 100. The two opposite sides of the second mounting hole 102 extend along the length direction of the crank arm 100, and thus the second mounting hole 102 is a long strip structure. When the second tooth 301 is engaged with different first teeth 101, the shaft pin 401 slides in the second mounting hole 102 along the length direction of the crank arm 100, and then the locking nut 402 is put on and tightened to still lock the second tooth 301 with the corresponding first tooth 101 in the engaged state, which is simple to operate and saves time and effort. Of course, the two opposite sides of the first mounting hole 302 may extend along the length direction of the crank arm 100, or the two opposite sides of the first mounting hole 302 and the two opposite sides of the second mounting hole 102 may both extend along the length direction of the crank arm 100. It is only necessary that when the second tooth 301 engages with different first teeth 101, the axle pin 401 can still be passed through the first mounting hole 302 and the second mounting hole 102.

[0040] In some embodiments of the present invention, the tooth plate 300 is detachably disposed on the pull rod 200. This makes it more convenient to replace and repair the tooth plate 300.

[0041] In some embodiments of the present invention, Figure 2 As shown, the pull rod 200 is provided with a third mounting hole 201 penetrating from top to bottom corresponding to the first mounting hole 302, and the shaft pin 401 is passed through the third mounting hole 201. When the first mounting hole 302, the second mounting hole 102 and the third mounting hole 201 are aligned, the shaft pin 401 is inserted, and then the locking nut 402 is put on and tightened to detachably mount the tooth plate 300 on the pull rod 200. At the same time, since the tooth plate 300 is engaged with the crank arm 100, when the crank arm 100 rotates, the tooth plate 300 can rotate around the axis of the shaft pin 401, thereby realizing the rotation of the tooth plate 300 on the pull rod 200 at the same time. In addition, the shaft pin 401 also plays a locking role, so that the structure is simpler and more compact. Of course, a fourth mounting hole may be provided on the tooth plate 300 corresponding to the third mounting hole 201 , and the third mounting hole 201 and the fourth mounting hole may be aligned and the rotating shaft may be inserted, so that the tooth plate 300 can be rotated and detachably provided on the pull rod 200 .

[0042] In some embodiments of the present invention, Figure 2 and Figure 4 As shown, a shaft sleeve 403 is installed between the third mounting hole 201 and the shaft pin 401. The shaft sleeve 403 is sleeved outside the shaft pin 401 and is installed in the third mounting hole 201. The shaft sleeve 403 can not only reduce the friction force on the shaft pin 401 when the pull rod 200 rotates relative to the shaft pin 401, but also prevent the shaft pin 401 from swinging due to the mismatch with the third mounting hole 201.

[0043] In some embodiments of the present invention, Figures 1 to 4 As shown, the pull rod 200 is provided with a U-shaped frame 202, the third mounting hole 201 is provided on the U-shaped frame 202, and the end of the crank arm 100 close to the tooth plate 300 and the tooth plate 300 are both mounted in the U-shaped frame 202. The U-shaped frame 202 is arranged horizontally, and the mounting space thereon is opened front and back, and the third mounting hole 201 is arranged on the upper end and the lower end of the U-shaped frame 202. The end of the crank arm 100 close to the tooth plate 300 and the tooth plate 300 are both mounted in the mounting space of the U-shaped frame 202, which can prevent the first tooth 101 and the second tooth 301 from being directly exposed to the outside and being covered with dust or damaged, and the upper end and the lower end of the U-shaped frame 202 can also prevent the crank arm 100 and the tooth plate 300 from moving up and down, so that the crank arm 100 and the tooth plate 300 are more firmly connected.

[0044] In some embodiments of the present invention, Figure 2 and Figure 4As shown, an elastic pad 404 is provided between the crank arm 100 and the inner wall of the U-shaped frame 202, and the elastic pad 404 is sleeved outside the shaft pin 401. The elastic pad 404 can not only further prevent the crank arm 100 from moving up and down, but also has elasticity and can play a buffering role to prevent the crank arm 100 from being damaged by excessive impact force when interacting with the U-shaped frame 202. In addition, a gasket 405 can also be provided between the locking nut 402 and the U-shaped frame 202 to play an anti-loosening role.

[0045] In some embodiments of the present invention, Figure 4 As shown, the first tooth 101 is arranged on the upper end surface of the crank arm 100, the tooth plate 300 is correspondingly arranged above the crank arm 100, and the second tooth 301 is arranged on the lower end surface of the tooth plate 300. Then, when the second tooth 301 is meshed with the corresponding first tooth 101, the tooth plate 300 is directly supported on the crank arm 100 without falling, so that it is only necessary to directly lock the locking mechanism 400 afterwards, without the need to support the tooth plate 300 by hand, which is more convenient to operate, and saves time and effort. Of course, the first tooth 101 can also be arranged on the lower end surface of the crank arm 100, and the tooth plate 300 is correspondingly arranged below the crank arm 100.

[0046] The high-voltage disconnector according to the second embodiment of the present invention is provided with a transmission mechanism with adjustable lever arm length according to the first embodiment of the present invention. Figure 6 FIG. 1 is a schematic diagram of a local structure of a high-voltage disconnector, showing a local structure of a switch assembly. Specifically, Figure 6As shown, the high-voltage disconnector is provided with a support frame 500, on which three static insulating columns 501 can be vertically arranged, and static contacts are arranged at the tops of the static insulating columns 501. Three moving insulating columns 502 are also vertically and rotatably arranged on the support frame 500, and moving contacts are arranged at the tops of the moving insulating columns 502. A connecting shaft 503 is coaxially arranged at the bottom end of the moving insulating column 502, and a flange 103 is arranged on the connecting shaft 503. The end of the crank arm 100 away from the first tooth 101 is also provided with a flange 103. 3. The crank arm 100 is connected to the moving insulating column 502 through two flanges 103, and the other end of the crank arm 100 is rotatably connected to the pull rod 200 through the tooth plate 300. When the pull rod 200 moves in a direction close to its own length, it can drive the crank arm 100 to rotate, and the crank arm 100 further drives the corresponding moving insulating column 502 to rotate, and the moving insulating column 502 further drives the corresponding moving contact to rotate, so that the moving contact contacts the corresponding static contact or separates from the corresponding static contact, thereby realizing the closing and opening of the switch assembly. The high-voltage disconnector of this embodiment is provided with a transmission mechanism with adjustable force arm length according to the first aspect of the present invention, which can make the force arm length of the force applied by the pull rod 200 to each crank arm 100 in the three switch assemblies of the high-voltage disconnector consistent, so that the three crank arms 100 can rotate synchronously, and then the three moving contacts can rotate synchronously, and finally when the three switch assemblies can be opened and closed simultaneously, the safety performance of the high-voltage disconnector is improved.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0048] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A transmission mechanism with adjustable lever arm length, characterized in that: include: A crank arm, wherein one end of the crank arm is provided with a plurality of first teeth in sequence along its length direction; A pull rod, wherein a tooth plate is rotatably provided on the pull rod, and a plurality of second teeth are provided on the tooth plate, and the second teeth can mesh with different first teeth; a locking mechanism for maintaining the second tooth in meshing state with the corresponding first tooth; The tooth plate is provided with a first mounting hole, the crank arm is provided with a second mounting hole, the first mounting hole passes through the middle of the second tooth, and the second mounting hole passes through the middle of the first tooth; The locking mechanism is provided with an axle pin; The opposite sides of the second mounting hole extend along the length direction of the crank arm; Among them, when the first tooth and the second tooth are engaged at different first positions along the length direction of the crank arm, the first mounting hole and the second mounting hole correspond to each other at different second positions, and the axle pin can penetrate the first mounting hole and the second mounting hole in sequence at different second positions along the length direction of the crank arm and be threadedly connected with a locking nut to connect the pull rod, the tooth plate and the crank arm.

2. The transmission mechanism with adjustable lever arm length according to claim 1, characterized in that: The tooth plate is detachably arranged on the pull rod.

3. The transmission mechanism with adjustable lever arm length according to claim 2, characterized in that: The pull rod is provided with a third mounting hole which passes through the pull rod from top to bottom corresponding to the first mounting hole, and the shaft pin passes through the third mounting hole.

4. The transmission mechanism with adjustable lever arm length according to claim 3, characterized in that: A shaft sleeve is installed between the third mounting hole and the shaft pin.

5. The transmission mechanism with adjustable lever arm length according to claim 3, characterized in that: The pull rod is provided with a U-shaped frame, the third mounting hole is arranged on the U-shaped frame, and one end of the crank arm close to the tooth plate and the tooth plate are both matched and mounted in the U-shaped frame.

6. The transmission mechanism with adjustable lever arm length according to claim 5, characterized in that: An elastic pad is arranged between the crank arm and the inner wall of the U-shaped frame, and the elastic pad is sleeved outside the shaft pin.

7. The transmission mechanism with adjustable lever arm length according to any one of claims 1 to 6, characterized in that: The first tooth is arranged on the upper end surface of the crank arm, and the tooth plate is correspondingly arranged above the crank arm.

8. A high voltage isolating switch, characterized in that: A transmission mechanism with adjustable lever arm length as claimed in any one of claims 1 to 7 is provided.

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