Switching device

Abstract

The utility model provides a kind of switch device.The switch device includes: shell;Support pipe, the support pipe is arranged in shell and is fixed to shell;Movable contact assembly, the movable contact assembly is slidably received in support pipe to move along the axial direction of support pipe;And drive mechanism, the drive mechanism includes rotatable input shaft, transmission unit and output component, input shaft extends into shell and drives output component by transmission unit, output component drives movable contact assembly axial movement;Wherein, input shaft and output component are offset to each other in axial direction, and transmission unit is at least partially mounted to the circumferential wall of support pipe.The drive mechanism of above-mentioned switch device has compact structure, can reduce the interference of drive mechanism to the structural design and layout of other components in shell, while reducing overall equipment size.

Description

Technical Field

[0001] This utility model relates generally to the field of switchgear technology, and more specifically to gas-insulated switchgear. Background Technology

[0002] Typically, the housing of a gas-insulated switchgear (GIS) forms a sealed space filled with insulating gas. Switching devices such as circuit breakers, grounding switches, and disconnecting switches can be housed within the housing for safe electrical operation. The moving contact assembly of the switching device can be driven by a drive mechanism, at least a portion of which is located within the housing. Ideally, the portion of the drive mechanism located within the housing should be compact to minimize interference with the design and layout of various components within the housing, while simultaneously reducing the overall device size. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the prior art and to propose an improved switching device.

[0004] To address this, the present invention provides a switching device comprising: a housing; a support tube disposed within and fixed to the housing; a moving contact assembly slidably received within the support tube for axial movement along the support tube; and a drive mechanism comprising a rotatable input shaft, a transmission unit, and an output component, the input shaft extending into the housing and driving the output component via the transmission unit, the output component driving the moving contact assembly axially; wherein the input shaft and the output component are offset relative to each other in the axial direction, and the transmission unit is at least partially mounted to the circumferential wall of the support tube.

[0005] Based on the above technical concept, the present invention may further include any one or more of the following optional embodiments.

[0006] In some alternative embodiments, the transmission unit includes an engaging belt drive assembly or a chain drive assembly disposed along the axial direction, wherein the output component is in the form of a shaft, and the input shaft drives the output component to rotate via the engaging belt drive assembly or the chain drive assembly.

[0007] In some alternative embodiments, the moving contact assembly is provided with a rack extending along the axial direction, wherein the output component is in the form of a gear shaft and meshes with the rack.

[0008] In some alternative embodiments, the moving contact assembly includes a moving contact tube, the moving contact tube including an axial groove in its circumferential wall, wherein the rack is fixed to the inner side of the axial groove.

[0009] In some alternative embodiments, the transmission unit further includes a plurality of sleeves and a plurality of bearings, wherein the plurality of bearings are mounted to the circumferential wall of the support tube, and wherein each of the plurality of sleeves is rotatably supported by a corresponding bearing and is sleeved between the input shaft and the pulley of the meshing belt drive assembly or the sprocket of the chain drive assembly, or between the output component and the pulley of the meshing belt drive assembly or the sprocket of the chain drive assembly.

[0010] In some alternative embodiments, the transmission unit includes a lead screw arranged outside the support tube along the axial direction, wherein the output component is sleeved on the lead screw and threadedly engaged with the lead screw, and the output component is connected to the moving contact assembly, wherein the input shaft drives the output component to move axially via the lead screw.

[0011] In some alternative embodiments, the transmission unit further includes two bevel gears, which are respectively disposed on the input shaft and the lead screw and mesh with each other.

[0012] In some alternative embodiments, the transmission unit further includes a plurality of bearings mounted to the circumferential wall of the support tube to rotatably support the two bevel gears and the lead screw.

[0013] In some alternative embodiments, the output component includes a pin connected to the moving contact assembly via a spherical bearing to allow the pin to move relative to the moving contact assembly within a predetermined range of motion.

[0014] In some alternative embodiments, the input shaft and / or the output component extends perpendicular to the axial direction.

[0015] In some alternative embodiments, one of the moving contact assembly and the support tube includes a guide groove extending along the axial direction, and the other of the moving contact assembly and the support tube includes a guide pin, wherein the guide pin is adapted to move along the guide groove.

[0016] In some alternative embodiments, the switching device includes a shielding enclosure surrounding the transmission unit and including a window through which the input shaft passes.

[0017] In some alternative embodiments, the switching device includes a flexible pad that covers the window and includes an orifice, wherein the input shaft passes through the orifice and the outer periphery of the input shaft contacts the inner edge of the orifice.

[0018] In some optional embodiments, the moving contact assembly includes a moving contact tube, an arc contact, and an inner tube disposed within the moving contact tube for supporting the arc contact. The switching device further includes a guide tube fixed to the support tube, wherein the inner tube is slidably sleeved outside the guide tube.

[0019] In some alternative embodiments, the input shaft includes an insulating rod and a metal shaft disposed at the end of the insulating rod, the metal shaft being connected to the transmission unit.

[0020] In some alternative embodiments, the switching device is a gas-insulated switching device, and / or the switching device is a disconnecting switch.

[0021] According to this invention, the input shaft and output component of the drive mechanism of the switching device are offset from each other in the axial direction of the support tube, and the transmission unit of the drive mechanism is at least partially mounted to the circumferential wall of the support tube. This allows the transmission unit to be arranged along the axial direction of the support tube to make full use of the axial space around the support tube, thereby giving the drive mechanism a compact structure, reducing interference of the drive mechanism with the structural design and layout of other components within the housing, and reducing the overall device size. Attached Figure Description

[0022] Other features and advantages of this utility model will be better understood through the following detailed description of optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar parts, wherein:

[0023] Figure 1 This is a cross-sectional view of a switching device according to the first embodiment of the present invention;

[0024] Figure 2A and Figure 2B These are additional sectional views of the switching device according to the first embodiment of the present invention, cut along different planes;

[0025] Figure 3 yes Figure 1 A magnified view of a portion of the image;

[0026] Figure 4 This is a partial perspective view of the switching device according to the first embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional view of a switching device according to a second embodiment of the present invention;

[0028] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0029] Figure 7This is a partial sectional view of a switching device according to a second embodiment of the present invention; and

[0030] Figure 8 This is a partial perspective view of a switching device according to a second embodiment of the present invention. Detailed Implementation

[0031] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of specific ways of implementing and using this utility model, and are not intended to limit the scope of this utility model. In the description, the structural positions of the various components, such as upper, lower, top, bottom, etc., are not absolute, but relative. These orientations are appropriate when the various components are arranged as shown in the figures, but these orientations change accordingly when the positions of the various components in the figures change.

[0032] In this invention, the axial direction of a tubular or annular component refers to the direction of the component's central axis or a direction parallel to the central axis; the circumferential direction of a tubular or annular component refers to the direction along the circumference of the component; and the radial direction of a tubular or annular component refers to the direction passing through the component's central axis and perpendicular to the component's axial direction.

[0033] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In this utility model, unless otherwise expressly specified, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Figures 1 to 4 A switching device and its components according to a first embodiment of the present invention are shown.

[0035] Reference Figure 1According to the first embodiment, the switching device 10 includes a housing 100, a support tube 200, a moving contact assembly 300, and a drive mechanism 400. The support tube 200 is disposed within and fixed to the housing 100. The moving contact assembly 300 is slidably received within the support tube 200 for movement along the axial direction A of the support tube 200. The drive mechanism 400 includes a rotatable input shaft 402, a transmission unit 404, and an output component 406. The input shaft 402 extends into the housing 100 and drives the output component 406 via the transmission unit 404, which in turn drives the moving contact assembly 300 to move axially. The input shaft 402 and the output component 406 are offset from each other in the axial direction A of the support tube 200, and the transmission unit 404 is at least partially (optionally, entirely) mounted to the circumferential wall 202 of the support tube 200.

[0036] In the aforementioned switchgear 10, the input shaft 402 and output component 406 of the drive mechanism 400 are offset from each other in the axial direction A of the support tube 200, and the transmission unit 404 of the drive mechanism 400 is at least partially mounted to the circumferential wall 202 of the support tube 200. This allows the transmission unit 404 to be arranged along the axial direction A of the support tube 200 to make full use of the axial space around the support tube 200, thereby giving the drive mechanism 400 a compact structure, reducing the interference of the drive mechanism 400 with the design and layout of other components within the housing 100, and reducing the overall device size. In this document, "mounted to the circumferential wall of the support tube" can mean directly mounted to the circumferential wall of the support tube or indirectly mounted to the circumferential wall of the support tube.

[0037] Reference Figures 1 to 2B The switchgear 10 can be a disconnecting switch. The housing 100 of the switchgear 10 can be filled with an insulating gas; in other words, the switchgear 10 can be a gas-insulated switchgear. The housing 100 can include a cylindrical body 102 and insulators 104A and 104B respectively covering opposite ends of the cylindrical body 102. In the illustrated embodiment, insulators 104A and 104B are basin-type insulators, and each includes a metal insert 106A and 106B for electrical connection at its center. In the illustrated embodiment, the cylindrical body 102 also has openings 108A and 108B at its top and bottom, respectively. Accordingly, the housing 100 also includes cover plates 110A and 110B for covering openings 108A and 108B, respectively. The cylindrical body 102 and cover plates 110A and 110B can be made of metal.

[0038] The support tube 200 can be made of metal, such as aluminum alloy. One end 204A of the support tube 200 can be fixed by fasteners and electrically connected to the metal insert 106A of the insulator 104A. The inner surface of the other end 204B of the support tube 200 can be provided with a spring contact 206 for electrical contact with the moving contact assembly 300, so as to realize the electrical connection between the moving contact assembly 300, the support tube 200, and the metal insert 106A of the insulator 104A.

[0039] Reference Figure 1 and Figure 3 The moving contact assembly 300 of the switchgear 10 may include a moving contact tube 302 (i.e., the active contact), an arc contact (i.e., the auxiliary moving contact, not shown in the figure), and an inner tube 304. The moving contact tube 302 may be slidably received within a support tube 200 to be movable along the axial direction A of the support tube 200. Guide rings 208A and 208B may also be provided on the inner surface of the support tube 200 to guide the axial movement of the moving contact tube 302. The guide rings 208A and 208B may be made of a wear-resistant insulating material (e.g., polytetrafluoroethylene). The moving contact tube 302 may be electrically connected to the support tube 200 and the metal insert 106A of the insulator 104A via a spring contact 206. The inner tube 304 may be disposed within the moving contact tube 302. The inner tube 304 may be fixed to the moving contact tube 302 at one end and support the arc contact at the other end. The switchgear 10 may also include a stationary contact assembly 500. The stationary contact assembly 500 may be mounted and electrically connected to the metal insert 106B of the insulator 104B.

[0040] Continue to refer to Figure 1 and Figure 3 The moving contact assembly 300 can be driven by the output component 406 of the drive mechanism 400 to move along the axial direction A of the support tube 200 between a closed position in contact / electrical connection with the stationary contact assembly 500 and a disconnected position in discontinuing contact / disconnection from the stationary contact assembly 500, so as to realize the closing and opening of the switchgear 10.

[0041] The input shaft 402 of the drive mechanism 400 can extend through the first cover plate 110A in a sealed manner. The input shaft 402 can extend perpendicular to the axial direction A of the support tube 200. The input shaft 402 can be rotated by an operating device outside the housing 100. The input shaft 402 may include an insulating rod 408 and a metal shaft 410 disposed at the end of the insulating rod 408 located inside the housing 100. The metal shaft 410 can be partially embedded in the end of the insulating rod 408 and partially protrude from the end of the insulating rod 408. The metal shaft 410 is operatively connected to the transmission unit 404.

[0042] Reference Figure 1 , Figure 3 and Figure 4 In the illustrated embodiment, the transmission unit 404 of the drive mechanism 400 may include a meshing belt drive assembly 412 (also referred to as a synchronous belt drive assembly) disposed along the axial direction A of the support tube 200. The meshing belt drive assembly 412 may include pulleys 414A and 414B, and a drive belt 416 that engages with pulleys 414A and 414B. The teeth 418 on the inner side of the drive belt 416 may engage with the tooth grooves 420 of pulleys 414A and 414B. In the illustrated embodiment, the output member 406 may be in the form of a gear shaft and include a gear portion 422 at its end. The output member 406 may extend perpendicular to the axial direction A of the support tube 200. The input shaft 402 may drive the output member 406 to rotate via the meshing belt drive assembly 412.

[0043] It is conceivable that, in some other embodiments not shown, the transmission unit may include a chain drive assembly disposed along the axial direction of the support tube, through which the input shaft can drive the output component to rotate.

[0044] In the illustrated embodiment, the transmission unit 404 may further include sleeves 424A and 424B and bearings 426A and 426B.

[0045] In the illustrated embodiment, one end of the sleeve 424A can be fitted between the metal shaft 410 of the input shaft 402 and the pulley 414A. The other end of the sleeve 424A can be fitted between the metal shaft 410 of the input shaft 402 and the bearing 426A, so as to be rotatably supported by the bearing 426A. The metal shaft 410 of the input shaft 402 can be connected to the sleeve 424A in a non-rotatable manner, for example, by a spline, so that the input shaft 402 and the sleeve 424A rotate synchronously. The sleeve 424A and the pulley 414A can be connected in a non-rotatable manner, for example, by flat surfaces (e.g., formed by machining) respectively provided on the sleeve 424A and the pulley 414A, so that the sleeve 424A and the pulley 414A rotate synchronously. The sleeve 424A may include a shoulder 428A located between its two ends. The pulley 414A and bearing 426A are located on opposite sides of the shoulder 428A and abut against opposite sides of the shoulder 428A. A retaining ring 430A, for example in the form of a snap ring, may also be provided at the end of the sleeve 424A. The sleeve 424A can be limited in axial movement relative to the bearing 426A by being limited by the shoulder 428A and the retaining ring 430A. The pulley 414A may also be provided with a set screw 432 to limit the axial movement of the pulley 414A relative to the sleeve 424A. The bearing 426A can be fixedly mounted to the circumferential wall 202 of the support tube 200 via a mounting plate 434A.

[0046] In the illustrated embodiment, one end of the sleeve 424B can be fitted between the output component 406 and the pulley 414B. The other end of the sleeve 424B can be fitted between the output component 406 and the bearing 426B, so as to be rotatably supported by the bearing 426B. The output component 406 can be connected to the sleeve 424B in a non-rotatable manner by, for example, a flat key, so that the output component 406 and the sleeve 424B rotate synchronously. The sleeve 424B and the pulley 414B can be connected in a non-rotatable manner by flat surfaces (e.g., formed by machining) respectively provided on the sleeve 424B and the pulley 414B, so that the sleeve 424B and the pulley 414B rotate synchronously. The sleeve 424B may include a shoulder 428B located between its two ends. The pulley 414B and the bearing 426B are located on opposite sides of the shoulder 428B and abut against opposite sides of the shoulder 428B, respectively. A retaining ring 430B may also be provided at the end of the sleeve 424B. The sleeve 424B can be limited in axial movement relative to the bearing 426B by the shoulder 428B and the retaining ring 430B. The pulley 414B may also be provided with a set screw (not shown) to limit the axial movement of the pulley 414B relative to the sleeve 424B. The output component 406 may include a flange 436 and a retaining ring 430C at its end. The output component 406 can be prevented from axial movement relative to the sleeve 424B by the flange 436 and the retaining ring 430C. The bearing 426B may be fixedly mounted to the circumferential wall 202 of the support tube 200 by a mounting plate 434B.

[0047] In the illustrated embodiment, all components of the transmission unit 404, namely the meshing belt drive assembly 412, sleeves 424A and 424B, and bearings 426A and 426B, are directly or indirectly mounted to the circumferential wall 202 of the support tube 200.

[0048] It is conceivable that, in the case where the transmission unit includes a chain drive assembly, each sleeve can be fitted between the input shaft and the sprocket of the chain drive assembly, or between the output component and the sprocket of the chain drive assembly.

[0049] In the illustrated embodiment, the moving contact tube 302 of the moving contact assembly 300 is provided with a rack 306 extending in the axial direction A along the support tube 200. The moving contact tube 302 includes an axial groove 308 located in its circumferential wall. The rack 306 is fixed to the inner side of the axial groove 308. The gear portion 422 of the output component 406 can mesh with the rack 306.

[0050] When the input shaft 402 rotates, it can drive the sleeve 424A and pulley 414A to rotate, which in turn causes the transmission belt 416 to move and drive the pulley 414B, sleeve 424B and output component 406 to rotate. The rotating output component 406 can drive the rack 306 and the moving contact tube 302 of the moving contact assembly 300 to move axially, thereby allowing the moving contact assembly 300 to move between the open position and the closed position.

[0051] Reference Figures 1 to 2B In the illustrated embodiment, the moving contact tube 302 of the moving contact assembly 300 includes a guide groove 310 extending in the axial direction A of the support tube 200. The support tube 200 is provided with a guide pin 210. The guide pin 210 is adapted to move axially along the guide groove 310 to guide the axial movement of the moving contact tube 302 relative to the support tube 200 and to limit relative rotation between the moving contact tube 302 and the support tube 200. It is conceivable that in other embodiments not shown, a guide pin may be provided on the moving contact tube, while a guide groove is provided on the support tube. At least one bushing 212 may be fitted over the guide pin 210. At least one bushing 212 may be limited by a retaining ring (not shown) to prevent movement of the bushing 212 in the axial direction of the guide pin 210. At least one bushing 212 may rotate relative to the guide pin 210 to reduce friction between the guide pin 210 and the guide groove 310 as the guide pin 210 moves along the guide groove 310.

[0052] In the illustrated embodiment, the switching device 10 may further include multiple shields 600A, 600B to optimize the electric field distribution within the housing 100 and prevent the escape of particles (e.g., metal particles) generated during operation of the switching device 10, which could lead to partial discharge and flashover. Shield 600A is disposed around the drive unit 404 and includes a window 602 through which the input shaft 402 passes. Shield 600B is disposed around the end of the moving support tube 200.

[0053] The aforementioned drive mechanism, especially the transmission unit of the drive mechanism, has a compact structure, which can reduce the interference of the drive mechanism on the structural design and layout of, for example, the moving contact assembly and the shield, thereby providing more design space for the moving contact assembly and helping to optimize the electric field distribution between the shield and the housing. For example, it can increase the distance between the shield and the housing, reduce the electric field strength in the housing, and improve electrical safety.

[0054] Figures 5 to 8 A switching device and its components according to a second embodiment of the present invention are shown.

[0055] The main difference between the switching device according to the second embodiment and the switching device according to the first embodiment lies in the construction of the drive mechanism. The differences between the two embodiments will be described below, while similarities will be briefly described or omitted.

[0056] Reference Figure 5 and Figure 6 According to the second embodiment, the switching device 10 includes a housing 100, a support tube 200, a moving contact assembly 300, and a drive mechanism 400. The support tube 200 is disposed within and fixed to the housing 100. The moving contact assembly 300 is slidably received within the support tube 200 for movement along the axial direction A of the support tube 200. The drive mechanism 400 includes a rotatable input shaft 402, a transmission unit 404, and an output component 406. The input shaft 402 extends into the housing 100 and drives the output component 406 via the transmission unit 404, which in turn drives the moving contact assembly 300 to move axially. The input shaft 402 and the output component 406 are offset from each other in the axial direction A of the support tube 200, and the transmission unit 404 is at least partially mounted to the circumferential wall 202 of the support tube 200. The input shaft 402 and the output component 406 extend perpendicular to the axial direction A of the support tube 200.

[0057] The switchgear 10 can be a disconnecting switch. The housing 100 of the switchgear 10 can be filled with insulating gas; in other words, the switchgear 10 can be a gas-insulated switchgear.

[0058] Continue to refer to Figure 5 and Figure 6 In the illustrated embodiment, the moving contact assembly 300 of the switching device 10 may include a moving contact tube 302 (i.e., the active contact), an arc contact (i.e., the auxiliary moving contact, not shown in the figure), and an inner tube 304. The moving contact tube 302 may be slidably received within the support tube 200 to move along the axial direction A of the support tube 200. A guide ring 208 may also be provided on the inner surface of the support tube 200 to guide the axial movement of the moving contact tube 302. The guide ring 208 may be made of a wear-resistant insulating material (e.g., polytetrafluoroethylene). The switching device 10 may also include a guide tube 700 fixed to the end wall 214 of the support tube 200. The inner tube 304 is slidably sleeved outside the guide tube 700, and the guide tube 700 may guide the axial movement of the inner tube 304. The guide ring 208 and the guide tube 700 cooperate to jointly guide the smooth axial movement of the moving contact assembly 300. The guide tube 700 can be made of metal, such as aluminum alloy.

[0059] In the illustrated embodiment, the input shaft 402 of the drive mechanism 400 of the switching device 10 may include an insulating rod 408 and a metal shaft 410 disposed at the end of the insulating rod 408. The metal shaft 410 is operatively connected to the transmission unit 404.

[0060] The transmission unit 404 of the drive mechanism 400 may include two bevel gears 438A and 438B and a lead screw 440. Bevel gear 438A may be sleeved on the metal shaft 410 of the input shaft 402 and connected to the metal shaft 410 via, for example, a spline, to allow synchronous rotation of bevel gear 438A and the input shaft 402. Bevel gear 438A may be rotatably supported by a bearing 426C. Bearing 426C may be mounted on the circumferential wall 202 of the support tube 200 via, for example, a retaining ring 430D. Bevel gear 438B may be sleeved on the longitudinal end 442A of the lead screw 440 and rotatably supported by a bearing 426D. Bearing 426D may be disposed in a mounting base 444A, which may be fixed to the circumferential wall 202 of the support tube 200, for example, by fasteners. Bevel gears 438A and 438B may mesh with each other. The lead screw 440 is arranged adjacent to the outside of the support tube 200 along the axial direction A of the support tube 200. The longitudinal end 442B of the lead screw 440 can be rotatably supported by a bearing 426E. The bearing 426E can be disposed in a mounting base 444B, which can be fixed to the circumferential wall 202 of the support tube 200, for example, by fasteners. In the illustrated embodiment, all components of the transmission unit 404, namely the bevel gears 438A, 438B, the lead screw 440, and the bearings 426C, 426D, 426E, are directly or indirectly mounted to the circumferential wall 202 of the support tube 200.

[0061] The output component 406 of the drive mechanism 400 is sleeved on the outside of the lead screw 440 and threadedly engaged with the lead screw 440 to move along the axial direction of the lead screw 440, i.e., the axial direction A of the support tube 200, when the lead screw 440 rotates. The output component 406 is connected to the moving contact tube 302 of the moving contact assembly 300, so that the moving contact assembly 300 can move axially with the output component 406. The switching device 10 may also include an anti-rotation mechanism (which functions similarly to the guide groove and guide pin in the first embodiment, not shown) to prevent the moving contact tube 302 from rotating relative to the support tube 200.

[0062] When the input shaft 402 rotates, it drives the bevel gear 438A to rotate, which in turn causes the bevel gear 438B and the lead screw 440 to rotate. When the lead screw 440 rotates, the output component 406 can move along the axial direction A of the support tube 200, and drive the moving contact assembly 300 to move axially.

[0063] Reference Figures 6 to 8In the illustrated embodiment, the output component 406 may include a nut 446 and a pin 448 connected to each other. The nut 446 is sleeved on and threadedly engaged with the lead screw 440. The pin 448 is connected to the moving contact tube 302 of the moving contact assembly 300 via a spherical bearing 800 to allow the columnar portion 448 to move relative to the moving contact tube 302 within a predetermined range of motion. The spherical bearing 800 may be mounted on the moving contact tube 302 and includes an outer ring 802 having an inner spherical surface and an inner ring 804 disposed within the outer ring 802 and having an outer spherical surface. The pin 448 of the output component 406 may be inserted into the opening 806 of the inner ring 804 via an axial opening 216 on the support tube 200 to connect with the inner ring 804.

[0064] In the illustrated embodiment, the inner ring 804 is capable of tilting relative to the outer ring 802 in various directions (when the inner ring 804 tilts relative to the outer ring 802, the central axis of the inner ring 804 is tilted relative to the central axis of the outer ring 802). The tilt angle range can be, for example, ±3° to ±10°, to allow the pin 448 to be easily inserted into the inner ring 804 during assembly.

[0065] Reference Figure 5 and Figure 6 In the illustrated embodiment, the switching device 10 may further include multiple shields 600A, 600B, and 600C to optimize the electric field distribution within the housing 100 and prevent the escape of particles (e.g., metal particles) generated during operation of the switching device 10, which could lead to partial discharge and flashover. Shield 600A is disposed around the drive unit 404 and includes a window 602 through which the input shaft 402 passes. The switching device 10 may also include a flexible pad 900. The flexible pad 900 may be fixed to a support plate 902 disposed on a mounting base 444A. The flexible pad 900 may be made of a material such as rubber or thermoplastic elastomer. The flexible pad 900 covers the window 602 and includes an aperture 904. The input shaft 402 passes through the aperture 904, and the outer periphery of the input shaft 402 contacts the inner edge of the aperture 904. The input shaft 402 can be interference-fitted with the orifice 904 of the flexible pad 900 to achieve a sealed fit between the input shaft 402 and the orifice 904 of the flexible pad 900. By providing the flexible pad 900, it is possible to further prevent particles generated during the operation of the switchgear 10 (e.g., metal particles generated when bevel gears 438A and 438B mesh) from escaping from the shield 600A through the gap between the input shaft 402 and the window 602 and diffusing into the insulating gas within the housing 100, thereby preventing partial discharge and flashover.

[0066] It should also be understood that the various components and features described herein may be made of a variety of materials, including but not limited to polymers, rubber, metals, and other suitable materials or combinations thereof known to those skilled in the art. Figures 1 to 8The embodiments shown only illustrate the shape, quantity, size and arrangement of the various optional components of the switching device according to the present invention. However, they are only illustrative and not limiting. Other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present invention.

[0067] The technical content and features of this utility model have been disclosed above. However, it is understood that, under the inventive concept of this utility model, those skilled in the art can easily make modifications, variations, and equivalents of these embodiments based on the disclosed content. For example, features shown or described as part of one embodiment can be used with another embodiment to produce yet another embodiment. This disclosure is intended to cover these modifications, variations, and equivalents. The description of the above embodiments is exemplary and not restrictive, and the scope of protection of this utility model is determined by the claims.

Claims

1. A switching device, characterized by The switching device (10) includes: Casing (100); A support tube (200) is disposed inside the housing (100) and fixed to the housing (100); A moving contact assembly (300) slidably received within the support tube (200) for movement in the axial direction (A) of the support tube (200); and A drive mechanism (400) includes a rotatable input shaft (402), a transmission unit (404), and an output component (406). The input shaft (402) extends into the housing (100) and drives the output component (406) via the transmission unit (404). The output component (406) drives the moving contact assembly (300) to move axially. The input shaft (402) and the output component (406) are offset from each other in the axial direction (A), and the transmission unit (404) is at least partially mounted to the circumferential wall (202) of the support tube (200).

2. The switching device of claim 1, wherein The transmission unit (404) includes a meshing belt drive assembly (412) or a chain drive assembly arranged along the axial direction (A), wherein the output component (406) is in the form of a shaft, and the input shaft (402) drives the output component (406) to rotate through the meshing belt drive assembly (412) or the chain drive assembly.

3. The switching device according to claim 2, characterized in that, The moving contact assembly (300) is provided with a rack (306) extending along the axial direction (A), wherein the output component (406) is in the form of a gear shaft and meshes with the rack (306).

4. The switching device according to claim 3, characterized in that, The moving contact assembly (300) includes a moving contact tube (302), the moving contact tube (302) including an axial groove (308) located on its circumferential wall, wherein the rack (306) is fixed to the inner side of the axial groove (308).

5. The switching device according to claim 2, characterized in that, The transmission unit (404) further includes a plurality of sleeves (424A, 424B) and a plurality of bearings, wherein the plurality of bearings are mounted to the circumferential wall (202) of the support tube (200), and wherein each of the plurality of sleeves (424A, 424B) is rotatably supported by a corresponding bearing and is sleeved between the input shaft (402) and the pulley of the meshing belt drive assembly (412) or the sprocket of the chain drive assembly, or between the output component (406) and the pulley of the meshing belt drive assembly (412) or the sprocket of the chain drive assembly.

6. The switching device according to claim 1, characterized in that, The transmission unit (404) includes a lead screw (440) arranged on the outside of the support tube (200) along the axial direction (A). The output component (406) is sleeved on the lead screw (440) and threadedly engaged with it. The output component (406) is connected to the moving contact assembly (300). The input shaft (402) drives the output component (406) to move axially through the lead screw (440).

7. The switching device according to claim 6, characterized in that, The transmission unit (404) also includes two bevel gears (438A, 438B), which are respectively mounted on the input shaft (402) and the lead screw (440) and mesh with each other.

8. The switching device according to claim 7, characterized in that, The transmission unit (404) also includes a plurality of bearings mounted to the circumferential wall (202) of the support tube (200) to rotatably support the two bevel gears (438A, 438B) and the lead screw (440).

9. The switching device according to claim 6, characterized in that, The output component (406) includes a pin (448) connected to the moving contact assembly (300) via a spherical bearing (800) to allow the pin (448) to move relative to the moving contact assembly (300) within a predetermined range of motion.

10. The switching device according to any one of claims 1 to 9, characterized in that, The input shaft (402) and / or the output component (406) extend perpendicular to the axial direction (A).

11. The switching device according to any one of claims 1 to 9, characterized in that, One of the moving contact assembly (300) and the support tube (200) includes a guide groove (310) extending along the axial direction (A), and the other of the moving contact assembly (300) and the support tube (200) includes a guide pin (210) wherein the guide pin (210) is adapted to move along the guide groove (310).

12. The switching device according to any one of claims 1 to 9, characterized in that, The switching device (10) includes a shield (600A) which is disposed around the transmission unit (404) and includes a window (602) through which the input shaft (402) passes.

13. The switching device according to claim 12, characterized in that, The switching device (10) includes a flexible pad (900) that covers the window (602) and includes an aperture (904), wherein the input shaft (402) passes through the aperture (904) and the outer periphery of the input shaft (402) contacts the inner edge of the aperture (904).

14. The switching device according to any one of claims 1 to 9, characterized in that, The moving contact assembly (300) includes a moving contact tube (302), an arc contact, and an inner tube (304) disposed within the moving contact tube (302) and used to support the arc contact. The switching device (10) further includes a guide tube (700) fixed to the support tube (200), wherein the inner tube (304) is slidably sleeved outside the guide tube (700).

15. The switching device according to any one of claims 1 to 9, characterized in that, The input shaft (402) includes an insulating rod (408) and a metal shaft (410) disposed at the end of the insulating rod (408), the metal shaft (410) being connected to the transmission unit (404).

16. The switching device according to any one of claims 1 to 9, characterized in that, The switchgear (10) is a gas-insulated switchgear, and / or the switchgear (10) is a disconnector.

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