Linkage type grounding switch

Abstract

The utility model provides a linkage type grounding switch. The linkage type grounding switch comprises three grounding bodies which are arranged at intervals along the height direction, each grounding body comprises a static contact and a grounding knife, and the grounding knife is rotatably arranged; an operation mechanism box; the operating mechanism box is in driving connection with the main transmission structure so as to drive the main transmission structure to rotate; and the auxiliary transmission assembly is arranged on the main transmission structure, and the main transmission structure drives the grounding switches to move through the auxiliary transmission assembly, so that the grounding body has a switching-on state in which the grounding switches are inserted into the static contacts and a switching-off state in which the grounding switches are separated from the static contacts. The three-pole grounding switch effectively solves the problem that a three-pole grounding switch in the prior art occupies a large area.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage grounding switches, in particular to a linkage grounding switch. Background Art

[0002] At present, the existing traditional outdoor high-voltage grounding switches are all installed in parallel, that is, the center lines of the insulators of each pole are parallel and the three poles are arranged in parallel in pairs, the three-pole grounding bodies are located at the same height, and the busbars connected to the grounding switches are also parallel to each other and in the same horizontal plane.

[0003] However, the above installation method of the three-pole grounding body needs to meet the phase-to-phase insulation distance, which will occupy the phase-to-phase space, resulting in a large footprint of the three-pole grounding body. It cannot be used in places with narrow phase-to-phase space and insufficient safety insulation distance, affecting the versatility of the three-pole grounding body. Utility Model Content

[0004] The main purpose of the utility model is to provide a linkage type grounding switch to solve the problem that the three-pole grounding switch in the prior art occupies a large area.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a linkage grounding switch, comprising: three grounding bodies arranged at intervals along the height direction, each grounding body comprising a static contact and a grounding knife, and the grounding knife is rotatably arranged; an operating mechanism box; a main transmission structure, the operating mechanism box is drivingly connected to the main transmission structure to drive the main transmission structure to rotate; an auxiliary transmission assembly, which is arranged on the main transmission structure, and the main transmission structure drives each grounding knife to move through the auxiliary transmission assembly, so that the grounding body has a closed state in which the grounding knife is inserted into the static contact and an open state in which the grounding knife is separated from the static contact.

[0006] Furthermore, the main transmission structure is rod-shaped, and there are three auxiliary transmission assemblies, which are arranged at intervals along the extension direction of the main transmission structure; wherein the three auxiliary transmission assemblies are arranged in one-to-one correspondence with the grounding blades of the three grounding bodies.

[0007] Furthermore, the auxiliary transmission assembly includes: a first crank arm, a first end of the first crank arm is connected to the main transmission structure; an auxiliary transmission structure, one side of the auxiliary transmission structure is movably arranged with the second end of the first crank arm, and the other side of the auxiliary transmission structure is movably connected with the grounding knife to drive the grounding knife to rotate.

[0008] Furthermore, along the extension direction of the main transmission structure, there is a gap between the side of the auxiliary transmission structure connected to the grounding knife and the first crank arm.

[0009] Furthermore, the extension direction of the first crank arm and the extension direction of the main transmission structure are arranged perpendicular to each other, and the auxiliary transmission structure includes: a first connecting shaft, which is passed through the second end of the first crank arm; a transmission rod, the first end of the transmission rod is connected to the first connecting shaft and is spaced apart from the first crank arm along the extension direction of the first connecting shaft, and the second end of the transmission rod is connected to the grounding knife; wherein the extension direction of the first connecting shaft and the extension direction of the first crank arm are arranged perpendicular to each other.

[0010] Furthermore, the linked earthing switch also includes a bracket, and three grounding bodies are arranged on the bracket at intervals along the height direction of the bracket; the grounding body also includes a second connecting shaft, and the grounding knife includes: a grounding knife body, which is used to be inserted into the static contact or separated from the static contact; wherein, the auxiliary transmission assembly also includes: a second crank arm, the first end of the second crank arm is connected to the grounding knife body, and the second end of the second crank arm is movably connected to the transmission rod; wherein, the second connecting shaft is passed through the first end of the second crank arm and the bracket to connect the grounding knife and the bracket.

[0011] Furthermore, the bracket includes: three cantilevers arranged at intervals along the height direction, the three cantilevers are arranged in one-to-one correspondence with the three grounding bodies, and the grounding knife of the grounding body is rotatably arranged on the cantilever corresponding to it.

[0012] Furthermore, the transmission rod includes: a rod body; a first extension plate, arranged on the first end of the rod body and connected to the first connecting shaft; a second extension plate, arranged on the second end of the rod body and connected to the second crank arm; wherein the plate surface of the first extension plate and the plate surface of the second extension plate are arranged perpendicular to each other.

[0013] Furthermore, the grounding body also includes: an insulator, which is arranged on a bracket, and a static contact is arranged on the top of the insulator; wherein the static contact includes a contact finger bracket, a contact finger, a spring sheet and a guide plate, the contact finger and the guide plate are both arranged on the contact finger bracket and surround the contact finger bracket to form an installation space, the installation space is used to insert the grounding knife, and the spring sheet is arranged on the surface of the contact finger away from the installation space.

[0014] Furthermore, the contact finger is formed by pressing a copper bar, and the cross section of the contact finger is wavy.

[0015] By applying the technical solution of the utility model, the linkage grounding switch includes three grounding bodies, an operating mechanism box, a main transmission structure and an auxiliary transmission assembly which are arranged at intervals along the height direction. Each grounding body includes a static contact and a grounding knife, and the grounding knife is rotatably arranged. The operating mechanism box is drivingly connected to the main transmission structure to drive the main transmission structure to rotate. The auxiliary transmission assembly is arranged on the main transmission structure, and the main transmission structure drives each grounding knife to move through the auxiliary transmission assembly, so that the grounding body has a closed state in which the grounding knife is inserted into the static contact and an open state in which the grounding knife is separated from the static contact. In this way, the three grounding bodies are arranged at intervals along the height direction, that is, the three grounding bodies are respectively located at different heights, thereby reducing the overall footprint of the linkage grounding switch, solving the problem of the large footprint of the three-pole grounding switch in the prior art, improving the versatility of the linkage grounding switch, and making it unrestricted in use. At the same time, when three grounding bodies are required to close or open the circuit, the operating mechanism box drives the main transmission structure to rotate, so as to drive the auxiliary transmission components through the main transmission structure to drive each grounding knife to move, and then the grounding knife is inserted into the static contact for closing or withdrawn from the static contact for opening, so as to ensure the normal operation of the linked grounding switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The figure shows a front view of the grounding switch of the embodiment of the linkage grounding switch according to the utility model when the grounding switch is in the open position;

[0018] Figure 2 Shows Figure 1 An enlarged schematic diagram of point A of the linkage earthing switch in FIG.

[0019] Figure 3 Shows Figure 1 A top view of the linked earthing switch in FIG.

[0020] Figure 4 Shows Figure 1 The main view of the linkage type earthing switch when the earthing switch is in the closed position;

[0021] Figure 5 Shows Figure 4 An enlarged schematic diagram of point B of the linkage earthing switch in FIG.

[0022] Figure 6 Shows Figure 4 A top view of the linked earthing switch in FIG.

[0023] Figure 7 Shows Figure 1 A front view of the stationary contact of the linkage earthing switch;

[0024] Figure 8 Shows Figure 7 A top view of the stationary contact in FIG.

[0025] Fig. 9 Shows Figure 7 A front view of the contact finger of the stationary contact;

[0026] Fig.10 Shows Fig. 9 A side view of the stationary contact in FIG.

[0027] Fig.11 Shows Fig. 9 Cross-sectional view of the stationary contact in FIG.

[0028] The above drawings include the following reference numerals:

[0029] 10. Bracket; 11. Cantilever;

[0030] 20. grounding body; 21. static contact; 211. contact finger bracket; 212. contact finger; 213. spring sheet; 214. guide plate; 22. grounding knife; 221. grounding knife body; 222. second crank arm; 23. second connecting shaft; 24. insulator;

[0031] 30. Operating mechanism box;

[0032] 40. Main transmission structure;

[0033] 50. Auxiliary transmission assembly; 51. First crank arm; 52. Auxiliary transmission structure; 521. First connecting shaft; 522. Transmission rod; 5221. Rod body; 5222. First extension plate; 5223. Second extension plate. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, directional words such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0037] In order to solve the problem of a large floor space occupied by a three-pole grounding switch in the prior art, the present application provides a linkage grounding switch.

[0038] like Figures 1 to 11 As shown, the linkage grounding switch includes three grounding bodies 20, an operating mechanism box 30, a main transmission structure 40 and an auxiliary transmission assembly 50. Among them, the three grounding bodies 20 are arranged at intervals along the height direction, and each grounding body 20 includes a static contact 21 and a grounding knife 22, and the grounding knife 22 is rotatably arranged. The operating mechanism box 30 is drivingly connected to the main transmission structure 40 to drive the main transmission structure 40 to rotate. The auxiliary transmission assembly 50 is arranged on the main transmission structure 40, and the main transmission structure 40 drives each grounding knife 22 to move through the auxiliary transmission assembly 50, so that the grounding body 20 has a closed state in which the grounding knife 22 is inserted into the static contact 21 and an open state in which the grounding knife 22 is separated from the static contact 21.

[0039] By applying the technical solution of this embodiment, the three grounding bodies 20 are arranged at intervals in the height direction, that is, the three grounding bodies 20 are respectively located at different heights, thereby reducing the overall footprint of the linkage grounding switch, solving the problem of the large footprint of the three-pole grounding switch in the prior art, and improving the versatility of the linkage grounding switch, so that its use place is not restricted. At the same time, when the three grounding bodies 20 are required to close or open the switch, the operating mechanism box 30 drives the main transmission structure 40 to rotate, so as to drive the auxiliary transmission assembly 50 to drive each grounding knife 22 to move through the main transmission structure 40, so that the grounding knife 22 is inserted into the static contact 21 for closing or withdrawn from the static contact 21 for opening, so as to ensure that the linkage grounding switch can operate normally.

[0040] In this embodiment, the main transmission structure 40 is rod-shaped, and there are three auxiliary transmission components 50, which are arranged at intervals along the extension direction of the main transmission structure 40. Among them, the three auxiliary transmission components 50 are arranged one by one corresponding to the grounding knives 22 of the three grounding bodies 20. In this way, each auxiliary transmission component 50 drives the grounding knife 22 of the corresponding grounding body 20 to move, which, on the one hand, realizes the synchronous opening and closing movement of the three grounding knives 22 driven by one main transmission structure 40, reduces the number of transmission structures, and reduces the difficulty of disassembly and assembly of the linkage grounding switch; on the other hand, it improves the movement stability and reliability of the three grounding knives 22, thereby improving the operating reliability of the linkage grounding switch. At the same time, the above-mentioned setting makes the structure of the main transmission structure 40 simpler, easier to process and realize, and reduces the processing cost and processing difficulty of the main transmission structure 40.

[0041] In this embodiment, three auxiliary transmission assemblies 50 are arranged at intervals along the height direction of the bracket 10 .

[0042] like Figure 2 and Figure 5 As shown, the auxiliary transmission assembly 50 includes a first crank arm 51 and an auxiliary transmission structure 52. The first end of the first crank arm 51 is connected to the main transmission structure 40, one side of the auxiliary transmission structure 52 is movably arranged with the second end of the first crank arm 51, and the other side of the auxiliary transmission structure 52 is movably connected with the grounding knife 22 to drive the grounding knife 22 to rotate. Among them, along the extension direction of the main transmission structure 40, there is a gap between the side of the auxiliary transmission structure 52 connected to the grounding knife 22 and the first crank arm 51. In this way, during the rotation of the main transmission structure 40, the first crank arm 51 can be driven to rotate synchronously, so as to drive the auxiliary transmission structure 52 and the grounding knife 22 to move through the first crank arm 51. The above setting of the gap avoids the auxiliary transmission structure 52 from interfering with the first crank arm 51 during the movement process, thereby affecting the normal rotation of the grounding knife 22, and improving the reliability of the opening and closing of the grounding body 20. At the same time, the above setting makes the structure of the auxiliary transmission assembly 50 simpler, easier to process and realize, and reduces the processing cost and difficulty of the auxiliary transmission assembly 50.

[0043] like Figure 2 and Figure 5As shown, the extension direction of the first crank arm 51 is perpendicular to the extension direction of the main transmission structure 40, and the auxiliary transmission structure 52 includes a first connecting shaft 521 and a transmission rod 522. The first connecting shaft 521 is passed through the second end of the first crank arm 51, the first end of the transmission rod 522 is connected to the first connecting shaft 521 and is spaced apart from the first crank arm 51 along the extension direction of the first connecting shaft 521, and the second end of the transmission rod 522 is connected to the grounding knife 22. Among them, the extension direction of the first connecting shaft 521 is perpendicular to the extension direction of the first crank arm 51. Optionally, the first angle is 90°. Optionally, the second angle is 90°. In this way, the two ends of the transmission rod 522 are connected to the grounding switch 22 and the first connecting shaft 521 respectively, the first connecting shaft 521 and the main transmission structure 40 extend in the same direction, and along the extending direction of the first connecting shaft 521, the transmission rod 522 and the first crank arm 51 are arranged at intervals on the first connecting shaft 521, further avoiding the motion interference between the transmission rod 522 and the first crank arm 51 during the movement process, thereby affecting the normal movement of the transmission rod 522 and the grounding switch 22. At the same time, the above arrangement makes the structure of the auxiliary transmission structure 52 simpler, easier to process and realize, and reduces the processing cost and difficulty of the linkage grounding switch.

[0044] In this embodiment, the transmission rod 522 is located above the first crank arm 51 with a preset space between the two to avoid motion interference between the two.

[0045] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the linkage grounding switch also includes a bracket 10, three grounding bodies 20 are arranged on the bracket 10 at intervals along the height direction of the bracket 10, and the grounding knife 22 is rotatably arranged on the bracket 10. The grounding body 20 also includes a second connecting shaft 23, and the grounding knife 22 includes a grounding knife body 221 and a second crank arm 222. The grounding knife body 221 is used to be inserted into the static contact 21 or separated from the static contact 21. Among them, the auxiliary transmission assembly 50 also includes a second crank arm 222, the first end of the second crank arm 222 is connected to the grounding knife body 221, and the second end of the second crank arm 222 is movably connected to the transmission rod 522. Among them, the second connecting shaft 23 is penetrated through the first end of the second crank arm 222 and the bracket 10 to connect the grounding knife 22 and the bracket 10. In this way, the first end of the second crank arm 222 is fixedly connected to the grounding knife body 221, and the two are rotatably connected to the bracket 10 through the second connecting shaft 23. On the one hand, the rotation reliability and rotation stability of the grounding knife 22 are improved; on the other hand, the structure of the grounding knife 22 is simpler, easier to process and realize, and the processing cost and difficulty of the grounding knife 22 are reduced.

[0046] Optionally, the second connecting shaft 23 is a pin shaft.

[0047] like Figure 1 and Figure 4 As shown, the bracket 10 includes three cantilevers 11 spaced apart in the height direction. The three cantilevers 11 are arranged one by one with the three grounding bodies 20, and the grounding blades 22 of the grounding bodies 20 are rotatably arranged on the corresponding cantilevers 11. In this way, the above arrangement ensures that the three grounding bodies 20 are spaced apart in the height direction of the bracket 10 to reduce the overall floor space; on the other hand, the structure of the bracket 10 is simpler, easier to process and realize, and the processing cost and difficulty of the bracket 10 are reduced.

[0048] Specifically, the grounding knife 22 rotates in a clockwise direction and is inserted into the static contact 21 to complete the closing of the circuit breaker, and rotates in a counterclockwise direction and is separated from the static contact 21 to complete the opening of the circuit breaker.

[0049] In this embodiment, the cantilever 11 extends in the horizontal direction.

[0050] like Figure 2 and Figure 5 As shown, the transmission rod 522 includes a rod body 5221, a first extension plate 5222 and a second extension plate 5223. The first extension plate 5222 is arranged on the first end of the rod body 5221 and connected to the first connecting shaft 521, and the second extension plate 5223 is arranged on the second end of the rod body 5221 and connected to the second crank arm 222. The plate surface of the first extension plate 5222 and the plate surface of the second extension plate 5223 are arranged perpendicular to each other. Optionally, the third angle is 90°. In this way, the above arrangement makes the structure of the transmission rod 522 simpler, easier to process and realize, reduces the processing cost and difficulty of the transmission rod 522, and also reduces the overall processing cost of the linkage grounding switch. At the same time, the above arrangement makes the auxiliary transmission assembly 50 a spatial four-bar structure.

[0051] In this embodiment, the operating mechanism box 30 is located below all the grounding bodies 20. In this way, the above-mentioned position setting facilitates the staff to operate the operating mechanism box 30, improves the user experience, and reduces the difficulty of operation.

[0052] like Figure 1 and Figure 4As shown, the grounding body 20 also includes an insulator 24. The insulator 24 is arranged on the bracket 10, and the static contact 21 is arranged on the top of the insulator 24. Among them, the static contact 21 includes a contact finger bracket 211, a contact finger 212, a spring sheet 213 and a guide plate 214. The contact finger 212 and the guide plate 214 are both arranged on the contact finger bracket 211 and surround the contact finger bracket 211 to form an installation space. The installation space is used to insert the grounding knife 22. The spring sheet 213 is arranged on the surface of the contact finger 212 away from the installation space. In this way, the above arrangement ensures that the grounding knife 22 can perform opening and closing operations with the static contact 21, thereby improving the operating reliability of the grounding body 20.

[0053] In this embodiment, the contact finger 212 is formed by pressing a copper bar, and the cross section of the contact finger 212 is wavy. In this way, the above arrangement enables the contact finger 212 to achieve multi-circuit flow diversion, and the pressing processing method can increase the rigidity and strength of the contact finger 212, improve the service life of the material, and also reduce the processing cost and difficulty of the contact finger 212.

[0054] In this embodiment, the conductive surface of the contact finger 212 is plated with graphene silver or conventional silver.

[0055] In this embodiment, the finger support 211 is an aluminum casting, the spring sheet 213 is a stainless steel plate, and the guide plate 214 is a steel plate.

[0056] Optionally, the insulator 24 is made of ceramic, silica gel, or glass. There is one grounding body 20 per pole, and three for three poles.

[0057] In this embodiment, the main body of the grounding knife 22 is a round aluminum tube.

[0058] Optionally, the operating mechanism box 30 is a manually operable electric operating mechanism.

[0059] In this embodiment, the first crank arm 51 and the second crank arm 222 are both plate-shaped, and the plate surface of the first crank arm 51 and the plate surface of the second crank arm 222 are arranged at a fourth angle. Optionally, the fourth angle is 90°. In this way, the above arrangement makes the structure of the first crank arm 51 and the second crank arm 222 simpler, easier to process and realize, and reduces the processing cost and difficulty of the linkage grounding switch.

[0060] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0061] The linkage type grounding switch includes three grounding bodies, an operating mechanism box, a main transmission structure and an auxiliary transmission assembly. Among them, the three grounding bodies are arranged at intervals along the height direction, and each grounding body includes a static contact and a grounding knife, and the grounding knife is rotatably arranged. The operating mechanism box is connected to the main transmission structure to drive the main transmission structure to rotate. The auxiliary transmission assembly is arranged on the main transmission structure, and the main transmission structure drives each grounding knife to move through the auxiliary transmission assembly, so that the grounding body has a closed state in which the grounding knife is inserted into the static contact and an open state in which the grounding knife is separated from the static contact. In this way, the three grounding bodies are arranged at intervals along the height direction, that is, the three grounding bodies are respectively located at different heights, thereby reducing the overall footprint of the linkage type grounding switch, solving the problem of the large footprint of the three-pole grounding switch in the prior art, improving the versatility of the linkage type grounding switch, and making it unrestricted in use. At the same time, when three grounding bodies are required to close or open the circuit, the operating mechanism box drives the main transmission structure to rotate, so as to drive the auxiliary transmission components through the main transmission structure to drive each grounding knife to move, and then the grounding knife is inserted into the static contact for closing or withdrawn from the static contact for opening, so as to ensure the normal operation of the linked grounding switch.

[0062] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0063] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0064] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A linkage grounding switch, characterized in that: include: Three grounding bodies (20) arranged at intervals in the height direction, each of the grounding bodies (20) comprising a stationary contact (21) and a grounding knife (22), and the grounding knife (22) is rotatably arranged; Operating mechanism box (30); A main transmission structure (40), wherein the operating mechanism box (30) is drivingly connected to the main transmission structure (40) to drive the main transmission structure (40) to rotate; An auxiliary transmission assembly (50) is arranged on the main transmission structure (40), and the main transmission structure (40) drives each of the grounding knives (22) to move through the auxiliary transmission assembly (50), so that the grounding body (20) has a closed state in which the grounding knife (22) is inserted into the static contact (21) and an open state in which the grounding knife (22) is separated from the static contact (21).

2. The linkage grounding switch according to claim 1, characterized in that: The main transmission structure (40) is rod-shaped, and there are three auxiliary transmission assemblies (50). The three auxiliary transmission assemblies (50) are arranged at intervals along the extension direction of the main transmission structure (40); wherein the three auxiliary transmission assemblies (50) are arranged in a one-to-one correspondence with the grounding knives (22) of the three grounding bodies (20).

3. The linkage grounding switch according to claim 1, characterized in that: The auxiliary transmission assembly (50) comprises: A first crank arm (51), wherein a first end of the first crank arm (51) is connected to the main transmission structure (40); An auxiliary transmission structure (52), one side of the auxiliary transmission structure (52) is movably arranged with the second end of the first crank arm (51), and the other side of the auxiliary transmission structure (52) is movably connected with the grounding knife (22) to drive the grounding knife (22) to rotate.

4. The linkage grounding switch according to claim 3, characterized in that: Along the extension direction of the main transmission structure (40), there is a gap between the side of the auxiliary transmission structure (52) connected to the grounding knife (22) and the first crank arm (51).

5. The linkage grounding switch according to claim 3, characterized in that: The extension direction of the first crank arm (51) and the extension direction of the main transmission structure (40) are arranged perpendicular to each other, and the auxiliary transmission structure (52) comprises: A first connecting shaft (521) is passed through the second end of the first crank arm (51); a transmission rod (522), wherein a first end of the transmission rod (522) is connected to the first connecting shaft (521) and is spaced apart from the first crank arm (51) along an extending direction of the first connecting shaft (521), and a second end of the transmission rod (522) is connected to the grounding knife (22); Wherein, the extension direction of the first connecting shaft (521) and the extension direction of the first crank arm (51) are arranged perpendicular to each other.

6. The linkage grounding switch according to claim 5, characterized in that: The linkage type grounding switch further comprises a bracket (10), and three grounding bodies (20) are arranged on the bracket (10) at intervals along the height direction of the bracket (10); the grounding body (20) further comprises a second connecting shaft (23), and the grounding knife (22) comprises: A grounding knife body (221) is used for being inserted into the static contact (21) or being separated from the static contact (21); Wherein, the auxiliary transmission assembly (50) further comprises: A second crank arm (222), wherein a first end of the second crank arm (222) is connected to the grounding knife body (221), and a second end of the second crank arm (222) is movably connected to the transmission rod (522); The second connecting shaft (23) is passed through the first end of the second crank arm (222) and the bracket (10) to connect the grounding knife (22) and the bracket (10).

7. The linkage grounding switch according to claim 6, characterized in that: The support (10) comprises: Three cantilevers (11) are arranged at intervals in the height direction. The three cantilevers (11) are arranged in one-to-one correspondence with the three grounding bodies (20). The grounding blades (22) of the grounding bodies (20) can be rotatably arranged on the cantilevers (11) corresponding thereto.

8. The linkage type grounding switch according to claim 6, characterized in that: The transmission rod (522) comprises: Rod body (5221); A first extension plate (5222), disposed on the first end of the rod body (5221) and connected to the first connecting shaft (521); A second extension plate (5223), disposed on the second end of the rod body (5221) and connected to the second crank arm (222); Wherein, the plate surface of the first extension plate (5222) and the plate surface of the second extension plate (5223) are arranged perpendicular to each other.

9. The linkage grounding switch according to claim 6, characterized in that: The grounding body (20) further comprises: An insulator (24) is arranged on the support (10), and the static contact (21) is arranged on the top of the insulator (24); The static contact (21) comprises a contact finger bracket (211), a contact finger (212), a spring sheet (213) and a guide plate (214); the contact finger (212) and the guide plate (214) are both arranged on the contact finger bracket (211) and surround the contact finger bracket (211) to form an installation space, the installation space is used to insert the grounding knife (22), and the spring sheet (213) is arranged on the surface of the contact finger (212) away from the installation space.

10. The linkage grounding switch according to claim 9, characterized in that: The contact finger (212) is formed by pressing a copper bar, and the cross section of the contact finger (212) is wavy.

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