Modular environmentally friendly metal-enclosed switchgear

Abstract

This invention discloses a modular, environmentally friendly metal-enclosed switchgear, specifically relating to the field of power distribution switchgear technology. It includes: a mounting box, a cabinet, a first track, a second track, a slide rail, and a floating mechanism. The cabinet comprises a rectangular shell composed of multiple plates. An elastic reset structure is provided on the inner side of the rectangular shell. The rectangular shell deforms under the pressure of the mounting box, allowing the elastic reset structure to provide elastic support for the rectangular shell in the horizontal plane, thereby compensating for the assembly tolerance between the mounting box and the slot. This invention, by providing slide rails on both sides of the mounting box, which cooperate with the first and second tracks on the inner side of the cabinet, constitutes a stable dual-track guiding system. This significantly reduces the resistance during the insertion and removal of the mounting box, achieving nearly interference-free smooth sliding, thereby greatly reducing wear on the guide surface and contact surface, and extending the overall service life of the drawer module and the cabinet.

Description

Technical Field

[0001] This invention relates to the field of power distribution switchgear technology, specifically to a modular, environmentally friendly metal-enclosed switchgear. Background Technology

[0002] Modular switchgear refers to a series of standardized, interchangeable independent units that are pre-designed and manufactured, and then combined like building blocks to flexibly and quickly construct a complete switchgear system that meets the needs of different users. Common modular switchgear includes drawer-type switchgear and handcart-type switchgear. Drawer-type switchgear integrates complete power supply circuits (including circuit breakers, instruments, etc.) into a standard-sized drawer. The drawer, as an independent functional module, can be pushed into the corresponding position in the switchgear body as needed, enabling flexible configuration and quick replacement.

[0003] The smooth insertion and precise positioning of drawer modules rely heavily on the precise fit between the guide devices (such as guide rails and sliders) on both outer walls and the matching guide rails fixed inside the cabinet. However, in actual manufacturing and application, machining and assembly tolerances at multiple stages are unavoidable, leading to uneven friction and jamming during the drawer's insertion or withdrawal. This abnormal mechanical interference and friction will continuously and rapidly wear down the guide surfaces of the drawer's outer walls and the contact surfaces of the cabinet's guide rails. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a modular and environmentally friendly metal-enclosed switch cabinet.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This modular and environmentally friendly metal-enclosed switchgear includes: a mounting box, which houses a power distribution module; and a cabinet with slots on its surface, into which the mounting box is inserted. The first track includes a first support rail fixed to the inner wall of one side of the slot; the second track includes a second support rail disposed on the inner wall of the other side of the slot; a slide rail is symmetrically fixed to the two side walls of the mounting box; the floating mechanism includes a rectangular shell composed of multiple plates, the inner side of which is provided with an elastic reset structure. When the mounting box is inserted into the slot, the slide rail slides above the first and second support rails. The rectangular shell is deformed by the pressure of the mounting box, so that the elastic reset structure provides elastic support for the rectangular shell in the horizontal plane, thereby compensating for the assembly tolerance between the mounting box and the slot.

[0006] Preferably, the mounting box includes a first side plate and a second side plate, and a back plate is connected to one end of the first side plate and the second side plate.

[0007] Preferably, the first track includes a first mounting plate, a first base is bolted to one side of the first mounting plate, a first horizontal plate is provided above the first base, one end of the first horizontal plate is fixedly connected to the first mounting plate, a support is connected to the top of the first base, and a first guide rail is fixed to the top of the support.

[0008] Preferably, the second track includes a second mounting plate, a second base is bolted to one side of the second mounting plate, a second horizontal plate is provided above the second base, one end of the second horizontal plate is fixedly connected to the second mounting plate, and the floating mechanism is provided on the top of the second base.

[0009] Preferably, the floating mechanism includes multiple rectangular plates, and spring assemblies are provided on the inner side of the rectangular plates. The spring assemblies have a rhomboid structure, which transmits the force of the spring in a symmetrical manner, generating a purer, torque-free restoring thrust. This improves the stability of the spring during the release of potential energy when the external force disappears, prevents the rectangular plate at the top of the rectangular shell from deviating, and avoids the problem of positional displacement of the second guide rail at the top of the rectangular plate.

[0010] Preferably, the top surface of the slide rail is an inclined surface.

[0011] Preferably, the mounting box is provided with a pushing mechanism inside, the pushing mechanism includes a mounting rail, one side of the mounting rail is provided with a bearing seat, and the other side is provided with a horizontally sliding contact module.

[0012] Preferably, a shaft body is provided in the middle of the bearing seat, and a gear and a push rod are connected to the end of the shaft body.

[0013] Preferably, a toothed rod is connected to the bottom of one end of the second base.

[0014] Preferably, the surface of the back plate has a through hole, and a rubber ring is fixed in the through hole, so that the contact structure at the end of the contact module can reciprocate within the rubber ring.

[0015] (1) The present invention forms a stable dual-track guide system by setting slide rails on both sides of the mounting box and cooperating with the first track and the second track inside the cabinet; wherein, the second track integrates a floating mechanism, which can compensate for the gap deviation between the slide rail and the track caused by processing and assembly tolerances; through dynamic adaptive adjustment, the non-uniform friction and jamming caused by tolerance accumulation in the traditional rigid guide structure are eliminated, the resistance during the insertion and removal of the mounting box is significantly reduced, and smooth sliding with almost no interference is achieved, thereby greatly reducing the wear of the guide surface and the contact surface and extending the overall service life of the drawer module and the cabinet.

[0016] (2) The present invention has a toothed rod at the bottom of the second track, which is linked with the push mechanism in the mounting box to form a mechanical program interlocking mechanism. During most of the stroke of the mounting box being inserted into the cabinet, the contact module is safely stored inside the mounting box. Only when the mounting box is about to reach the final working position will the toothed rod trigger the push mechanism to accurately push the contact module to engage with the stationary contact seat of the cabinet. This design ensures that the live contacts will not be exposed in any non-fully-positioned state during the insertion and removal process, eliminating the risk of accidental contact and improving operational safety. At the same time, the connection is only made at the end of the full stroke, which also avoids the arcing or mechanical damage that may occur during the sliding of the contacts, ensuring the reliability of the contact and the electrical life.

[0017] (3) Through the coordinated cooperation of the spring assembly of the floating mechanism in the second track and the pushing mechanism, when the rack and the gear of the pushing mechanism come into contact, the floating mechanism can act as a buffer structure to effectively absorb and dissipate the reaction force generated therefrom, preventing the mounting box from micro-movement or rebound at the key joint point. On the one hand, it ensures that the moving and stationary contacts have stable and constant contact pressure at the moment of engagement, avoiding local overheating, arcing or electrical wear caused by poor contact, and greatly improving the long-term reliability of the electrical connection. On the other hand, it also eliminates the sense of jerking during operation, making the insertion and removal feel in the final stage smoother and more stable, and improving the overall quality and operating experience of the product. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the mounting box and the first mounting plate of the present invention; Figure 3 This is a schematic diagram of the structure of the mounting box and the second mounting plate of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the structure of the mounting box and the second mounting plate of the present invention. Figure 2 ; Figure 5 for Figure 4 Enlarged view of section A in the middle; Figure 6 This is a perspective view of the mounting box of the present invention; Figure 7 for Figure 6 Enlarged view of section B; Figure 8This is a schematic diagram of the structure of the first track of the present invention; Figure 9 This is a perspective view of the first track of the present invention; Figure 10 This is a schematic diagram of the structure of the second track of the present invention; Figure 11 This is a perspective view of the second track of the present invention; Figure 12 This is a perspective view of the floating mechanism of the present invention; Figure 13 This is an exploded view of the floating mechanism of the present invention; Figure 14 This is a schematic diagram of the spring assembly of the present invention; Figure 15 for Figure 13 Enlarged view of section C; Figure 16 This is a schematic diagram of the structure of the back plate, the pushing mechanism, and the contact module of the present invention. Figure 1 ; Figure 17 This is a schematic diagram of the structure of the back plate, the pushing mechanism, and the contact module of the present invention. Figure 2 ; Figure 18 This is a schematic diagram of the structure of the back plate, the pushing mechanism, and the contact module of the present invention. Figure 3 ; Figure 19 This is a schematic diagram of the structure of the back plate, the pushing mechanism, and the contact module of the present invention. Figure 4 .

[0020] Explanation of reference numerals in the attached figures: 100. Cabinet; 200. Mounting box; 210. Back panel; 2110. Adhesive ring; 220. First side panel; 230. Second side panel; 2310. Opening; 300. Pushing mechanism; 310. Gear; 320. Shaft seat; 330. Mounting rail; 340. Push rod; 400, First track; 410, First base; 420, Support base; 430, First guide rail; 440, First horizontal plate; 450, First mounting plate; 500, Second track; 510, Second base; 520, Second guide rail; 530, Second mounting plate; 540, Second horizontal plate; 600, slide rail; 700. Gear rack; 800. Floating mechanism; 810. Rectangular plate; 820. Hinge; 830. Spring assembly; 900, Contact Module. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Drawer-type switchgear is widely used in modern power distribution systems due to its advantages of easy installation, maintenance, and expansion. However, during long-term use of this type of cabinet 100, mechanical insertion and removal jamming and wear problems occur between the drawer module and the cabinet 100 due to processing and assembly tolerances.

[0023] To solve the above-mentioned technical problems, the present invention provides a modular switch cabinet, including: cabinet body 100, mounting box 200, first rail 400, second rail 500, slide rail 600, floating mechanism 800, and contact module 900.

[0024] like Figure 1 As shown, the front surface of the cabinet 100 has a slot for accommodating the installation box 200 (drawer). The first rail 400 (left inner wall of the slot) and the second rail 500 (right inner wall of the slot) are fixedly connected to the inner wall of the slot by bolts. It should be noted that in actual use, the power distribution module (main circuit breaker, relay, current transformer and other electrical components, not shown in the figure) is usually arranged inside the mounting box 200 (drawer). like Figure 2 As shown, the mounting box 200 includes a front panel (the frontmost panel in the figure), a bottom support plate, a first side panel 220, a second side panel 230, and a back panel 210. It should be noted that a contact module 900 is also provided inside the mounting box 200 on one side of the back panel 210. After the mounting box 200 is inserted into the slot, the power distribution module and the stationary contact seat inside the cabinet 100 are connected through the contact module 900.

[0025] like Figure 6 As shown, slide rails 600 are fixedly connected to the side walls of the first side panel 220 and the second side panel 230 of the mounting box 200 (drawer). When the mounting box 200 is inserted into the slot, the slide rails 600 slide on the first track 400 and the second track 500. The first track 400 and the second track 500 guide the slide rails 600 so that the mounting box 200 enters the slot in a horizontal and stable state.

[0026] As a specific embodiment of the first track 400, the first track 400 includes a first mounting plate 450 fixedly connected to the inner wall of one side of the slot by bolts, a first base 410 connected to one side of the first mounting plate 450 by bolts, a support base 420 connected to the top of the first base 410, and a first guide rail 430 provided on the top of the support base 420. The first base 410 and the support base 420 are made of stainless steel and serve as rigid support structures to support the first guide rail 430, so that the first guide rail 430 will not bend downward or undergo other deformations when subjected to pressure. like Figure 8 , Figure 9 As shown, a first horizontal plate 440 is provided on one side of the first mounting plate 450 above the first base 410. The first horizontal plate 440 and the first mounting plate 450 are an integral structure, both made of stainless steel. There is a gap between the first horizontal plate 440 and the first guide rail 430, which is the first insertion space of the slide rail 600. When the mounting box 200 is inserted into the slot, the groove at the bottom of the slide rail 600 cooperates with the first guide rail 430, and the top of the slide rail 600 is an inclined surface (from the front panel of the mounting box 200 to the back panel 210, the top surface of the slide rail 600 is an inclined surface from high to low). When the slide rail 600 enters the first insertion space, the highest point of the top surface of the slide rail 600 is higher than the height of the first insertion space. The top surface of the slide rail 600 is made of rubber. During the continuous insertion of the mounting box 200 into the slot, the top surface of the slide rail 600 is squeezed and compressed, so that it can continue to enter the first insertion space. With the guidance and support of the slide rail 600, the mounting box 200 can move more stably in the slot without any shaking.

[0027] As a specific embodiment of the second track 500, the second track 500 includes a second mounting plate 530 fixedly connected to the inner wall of the slot by bolts, a second base 510 fixedly connected to one side of the second mounting plate 530 by bolts, a floating mechanism 800 connected above the second base 510, and a second guide rail 520 connected to the top of the floating mechanism 800. The second base 510 is made of the same material as the first base 410. The second base 510 provides stable support for the floating mechanism 800, ensuring that the bottom of the floating mechanism 800 is stable and does not shift under external force.

[0028] like Figure 10 , Figure 11 As shown, a second horizontal plate 540 is provided on one side of the second mounting plate 530 above the second base 510. The second horizontal plate 540 and the second mounting plate 530 are an integral structure, both made of stainless steel, and have sufficient structural strength. There is a gap between the second horizontal plate 540 and the second mounting plate 530. This gap is the second insertion space of the slide rail 600. The second insertion space provides movement space for the slide rail 600 on the right side of the second side plate 230 of the mounting box 200. The specific working principle is the same as the working principle of the slide rail 600 on the left side of the first side plate 220 of the mounting box 200 and the first insertion space.

[0029] As a specific implementation of the floating mechanism 800, such as Figure 12 As shown, the floating mechanism 800 includes a rectangular shell composed of multiple rectangular plates 810, and multiple elastic reset structures are provided inside the rectangular shell, such as... Figure 13 , Figure 14 As shown, the elastic reset structure is mainly composed of a spring assembly 830 in a pre-tightened state; Specifically, such as Figure 12 As shown, a rectangular shell includes four rectangular plates 810. The edges of two adjacent rectangular plates 810 are in contact and connected by hinges 820 (the hinges 820 are thin-walled flexible hinges, i.e., hinge structures made of thin-walled structures with elasticity). When pressure is applied to the top of the rectangular shell, the two adjacent rectangular plates 810 can rotate. In other words, the structure of the rectangular shell uses the flexibility of a parallelogram linkage mechanism to achieve the floating function.

[0030] It should be noted that, according to the motion characteristics of the parallelogram mechanism, when the rectangular shell is subjected to a lateral force in the horizontal plane, its two opposite rectangular plates 810 always remain parallel. That is to say, the rectangular plate 810 at the top of the rectangular shell only performs translational motion relative to the rectangular plate 810 at the bottom, and will not tilt or rotate.

[0031] It is worth noting that, under the action of the thin-walled flexible hinge, the rotation between two adjacent rectangular plates 810 will not generate friction, but will only perform guiding motion, which is beneficial to the free movement of the rectangular shell and its long-term use.

[0032] When the mounting box 200 is inserted into the slot of the cabinet 100, the slide rail 600 slides on top of the second guide rail 520, and the weight of the mounting box 200 and the slide rail 600 is applied to the floating mechanism 800 (i.e., the rectangular shell). After the rectangular plate 810 at the top of the rectangular shell is subjected to force, since the spring assembly 830 is composed of four springs in a pre-tightened state, the spring assembly 830 has stored a certain amount of elastic potential energy. When the external force compresses the springs in the pre-tightened state, the springs are further compressed, increasing their deformation and storing more elastic potential energy. When the external force disappears (the mounting box 200 is fully in place or pulled out), the additionally compressed or stretched spring assembly releases this increased potential energy. It drives the rectangular plate 810 and other rectangular plates 810 to move in the direction of reducing their own deformation through elastic restoring force, that is, returning to the position corresponding to their pre-tightened state, which is the precise center zero position. Based on the principle of the rectangular housing (parallelogram linkage mechanism) and spring assembly 830 described above, the rectangular housing and spring assembly 830 form a floating platform. like Figure 14As shown, the spring assembly 830 has a rhomboid structure. The rhomboid structure transmits the spring force in a symmetrical manner, which can generate a purer, torque-free restoring thrust. This improves the stability of the spring during the release of potential energy when the external force disappears, prevents the rectangular plate 810 at the top of the rectangular housing from deviating, and avoids the problem of positional displacement of the second guide rail 520 at the top of the rectangular plate 810 (compared to the state of the second guide rail 520 before the mounting box 200 is inserted into the slot).

[0033] To ensure safety, when the mounting box 200 is not fully inserted into the slot of the cabinet 100, the contact structure of the contact module 900 inside the mounting box 200 cannot be moved outside the box, the present invention provides the following technical solution: like Figure 2 As shown, a pushing mechanism 300 is provided inside the mounting box 200 outside the contact module 900. The pushing mechanism 300 moves synchronously with the mounting box 200. When the pushing mechanism 300 is driven by an external force, it can push the contact module 900 to make a horizontal displacement, thereby causing the contact structure of the contact module 900 to move to the outside of the back plate 210 of the mounting box 200. After the mounting box 200 is fully inserted into the slot, the contact structure of the contact module 900 is in contact with the stationary contact seat inside the cabinet 100, and complete conduction is achieved.

[0034] Specifically, such as Figure 16 , Figure 17 , Figure 18 As shown, in a specific embodiment of the pushing mechanism 300, the pushing mechanism 300 includes a mounting rail 330, which is fixed to the inner side of the back plate 210. The mounting rail 330 consists of two parallel plates, and a sliding groove is provided on the inner side wall of the two plates. A sliding block is provided on the outer wall of the contact module 900. After being pushed by an external force, the contact module 900 can move horizontally between the two plates. The pushing mechanism 300 also includes a bearing seat 320 fixed to one side of the mounting rail 330. A bearing is fixed in the middle of the bearing seat 320, and a shaft is inserted into the inner ring of the bearing. The end of the shaft extends to the bottom of the bearing seat 320 and protrudes from the bottom of the bearing seat 320. A gear 310 is fixedly connected to the bottom of the shaft by bolts. The gear 310 has a sector-shaped structure, such as... Figure 5 , Figure 6 , Figure 7 As shown, the side wall of the second side plate 230 has an opening 2310, through which the gear 310 passes and protrudes outside the second side plate 230; like Figure 17 As shown, a push rod 340 is also connected to the outer wall at the bottom of the shaft body. One end of the push rod 340 passes through the mounting rail 330 and contacts the bottom of the contact module 900. like Figure 11As shown, a toothed rod 700 is connected to the bottom of one end of the second base 510; During the insertion of the mounting box 200 into the slot, when the mounting box 200 is nearly fully inserted, the rack 700 contacts the gear 310, continuing to push the mounting box 200. Simultaneously, as the mounting box 200 drives the pushing mechanism 300, the gear 310 also moves synchronously. When the gear 310 meshes with the rack 700, the gear 310 drives the shaft to rotate, which in turn drives the push rod 340 to move. The end of the push rod 340 pushes the contact module 900, causing the contact module 900 to move on the mounting rail 330 (e.g., ...). Figure 4 , Figure 16 As shown, a through hole is formed on the surface of the back plate 210, and a rubber ring 2110 is fixed in the through hole. When the contact module 900 moves, the contact structure at the end of the contact module 900 moves within the rubber ring 2110. The rubber ring 2110 can provide insulation and prevent the contact structure from contacting the back plate 210, thus protecting the contact structure from friction. The contact module 900 eventually moves to the position shown in the image. Figure 19 The position and status are shown.

[0035] Through the above technical solution, a mechanical interlocking mechanism is formed by setting a toothed rod 700 at the bottom of the second track 500 and linking it with the pushing mechanism 300 inside the mounting box 200. During most of the stroke of the mounting box 200 being inserted into the slot of the cabinet 100, the contact module 900 is safely stored inside the mounting box 200. Only when the mounting box 200 is about to reach the final working position does the toothed rod 700 trigger the pushing mechanism 300 to precisely push the contact module 900 into engagement with the stationary contact seat inside the cabinet 100. This design ensures that the live contacts will not be exposed in any incompletely positioned state during the insertion and removal process, eliminating the risk of accidental contact and improving operational safety. At the same time, engaging only at the end of the full stroke also avoids arcing or mechanical damage that may occur during contact sliding, ensuring the reliability of contact and electrical life.

[0036] In this invention, through the coordinated cooperation of the spring assembly 830 of the floating mechanism 800 in the second track 500 and the pushing mechanism 300, when the rack 700 contacts the gear 310 of the pushing mechanism 300, the floating mechanism 800 can act as a buffer structure to effectively absorb and dissipate the resulting reaction force, preventing the mounting box 200 from micro-movement or rebound at the critical engagement point. On the one hand, this ensures that the moving and stationary contacts have stable and constant contact pressure at the moment of engagement, avoiding local overheating, arcing or electrical wear caused by poor contact, and greatly improving the long-term reliability of the electrical connection. On the other hand, it also eliminates the jerky feeling during operation, making the insertion and removal feel in the final stage smoother and more certain, improving the overall quality and operating experience of the product.

[0037] It should be noted that, as Figure 7As shown, the end of the slide rail 600 (the end near the back plate 210 of the mounting box 200) has an open structure, and the edge of the opening at the end of the slide rail 600 has an arc-shaped structure, so that when the mounting box 200 is inserted into the slot, the slide rail 600 can quickly adapt to the first guide rail 430 in the first track 400, and the slide rail 600 can quickly be inserted into the first insertion space; at the same time, the slide rail 600 can quickly adapt to the second guide rail 520 of the second track 500, and the slide rail 600 can also quickly be inserted into the second insertion space.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A modular, environmentally friendly metal-enclosed switchgear, characterized in that: include: The mounting box (200) has a power distribution module installed inside. The mounting box (200) includes a first side plate (220) and a second side plate (230). A back plate (210) is connected to one end of the first side plate (220) and one end of the second side plate (230). A pushing mechanism (300) is provided inside the mounting box (200). The pushing mechanism (300) includes a mounting rail (330), a bearing seat (320) is provided on one side of the mounting rail (330), and a horizontally sliding contact module (900) is provided on the other side. A shaft is provided in the middle of the bearing seat (320), and a gear (310) and a push rod (340) are connected to the end of the shaft. The cabinet (100) has a slot on its surface, and the mounting box (200) is inserted into the slot; The first track (400) includes a first support track fixed to the inner wall of one side of the slot; The second track (500) includes a second support rail disposed on the inner wall of the other side of the slot. The second track (500) includes a second mounting plate (530). A second base (510) is bolted to one side of the second mounting plate (530). A second horizontal plate (540) is disposed above the second base (510). One end of the second horizontal plate (540) is fixedly connected to the second mounting plate (530). A toothed rod (700) is connected to the bottom of one end of the second base (510). The slide rail (600) is symmetrically fixed to the two side walls of the mounting box (200); The floating mechanism (800) includes a rectangular shell composed of multiple plates. An elastic reset structure is provided on the inner side of the rectangular shell. When the mounting box (200) is inserted into the slot, the slide rail (600) slides above the first support rail and the second support rail. The rectangular shell is deformed by the pressure of the mounting box (200), so that the elastic reset structure provides elastic support for the rectangular shell in the horizontal plane, thereby compensating for the assembly tolerance between the mounting box (200) and the slot.

2. The modular environmentally friendly metal-enclosed switchgear according to claim 1, characterized in that: The first track (400) includes a first mounting plate (450), a first base (410) is bolted to one side of the first mounting plate (450), a first horizontal plate (440) is provided above the first base (410), one end of the first horizontal plate (440) is fixedly connected to the first mounting plate (450), a support seat (420) is connected to the top of the first base (410), and a first guide rail (430) is fixed to the top of the support seat (420).

3. The modular environmentally friendly metal-enclosed switchgear according to claim 1, characterized in that: The floating mechanism (800) includes multiple rectangular plates (810), and a spring assembly (830) is provided on the inner side of the rectangular plates (810).

4. The modular environmentally friendly metal-enclosed switchgear according to claim 1, characterized in that: The top surface of the slide rail (600) is an inclined surface.

5. The modular environmentally friendly metal-enclosed switchgear according to claim 1, characterized in that: The back plate (210) has a through hole on its surface, and a rubber ring (2110) is fixed in the through hole. The contact structure at the end of the contact module (900) can reciprocate in the rubber ring (2110).

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