Drawer type distribution box convenient to maintain

Abstract

The invention relates to the related technical field of power distribution equipment, in particular to a drawer type power distribution box convenient to maintain, which comprises a box body, an extraction frame capable of being extracted from the opening is horizontally and movably arranged in the box body, a supporting shaft is vertically arranged on the extraction frame, a first drawer, a second drawer and a third drawer are sequentially arranged on the supporting shaft from bottom to top, the first drawer and the second drawer are hinged to the supporting shaft, and the third drawer is fixedly connected with the supporting shaft; the length direction of the first drawer, the length direction of the second drawer and the length direction of the third drawer are parallel to one another, when the drawing-out frame is drawn out of the box body, the included angle between the length direction of the first drawer and the length direction of the second drawer is 90 degrees, and the included angle between the length direction of the second drawer and the length direction of the third drawer is 90 degrees. On the premise of ensuring that adjacent drawers cannot hinder each other during maintenance, the space occupancy rate during maintenance is reduced, and the bending resistance of the supporting shaft is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution equipment, and particularly to a drawer-type distribution box that is convenient for maintenance. Background Art

[0002] Drawer-type distribution cabinets have the advantages of small floor area, high integration, high safety reliability and sealing. However, since the equipment in each drawer of the drawer-type distribution box is relatively independent, in maintenance, cleaning, installation and other work, when multiple drawers are pulled out at the same time, they will block each other, so it is necessary to open each drawer separately for work. For example, in the initial low-voltage equipment installation work, it is necessary to install each drawer in turn, resulting in low work efficiency. And because the various components in the drawer-type distribution cabinet have a high degree of integration and the space is narrow and crowded, a large amount of heat will be generated when the components are working, which is likely to cause the distribution cabinet to catch fire due to excessive temperature. If not dealt with in time, it will cause great losses. The existing drawer-type distribution cabinets do not have a good way to handle such situations.

[0003] Chinese Patent Publication No. CN116683344B discloses a drawer-type distribution box, including a box body and a bottom plate. A support body is arranged on the bottom plate, and a plurality of rotating bodies are installed on the support body. A guide rail is installed on the rotating body, and a drawer is installed on the guide rail. An expansion support member is arranged on the bottom plate, and the expansion support member is used to drive the box body to adjust its height. An equipment room is arranged in the box body for accommodating the drawer, and a drawer opening for the drawer to be pulled out is arranged on the box body. In the normal state, the drawer is parallel to the drawer opening. After raising the height of the box body, all the drawers can be exposed. At this time, the drawers can rotate around the rotating body to be staggered from each other.

[0004] The above solution makes the drawers stagger from each other after rotating and unfolding by setting the drawers to rotate, which is convenient for maintenance. However, during maintenance, it is necessary to raise the box body, and the raised box body is supported by the support body. However, the center of gravity of the box body is on one side of the support body, and in order to facilitate maintenance, it is necessary to raise the box body to a relatively high height. Otherwise, the box body will easily form an obstacle above the drawer to be maintained. The higher the height of the box body, the greater the bending force on the support body, which is likely to cause the support body to bend. And the raised box body has a certain danger, and it is necessary to ensure that the raised box body is completely locked, otherwise it is likely to suddenly fall, which will not only injure the maintenance personnel, but also damage the electronic components in the drawer. Summary of the Invention

[0005] To solve the above problems, a drawer - type distribution box that is convenient for maintenance is provided. By setting multiple boxes, and arranging a draw - out rack that can be drawn out inside the box. At the same time, a first drawer, a second drawer, and a third drawer connected to a support shaft are arranged on the draw - out rack from bottom to top. The first drawer and the second drawer are hinged to the support shaft, and the third drawer is fixedly connected to the support shaft. When the draw - out rack is located inside the box, the length directions of the first drawer, the second drawer, and the third drawer are parallel to each other. When the draw - out rack is drawn out of the box, the included angle between the length direction of the first drawer and the length direction of the second drawer is 90 degrees, and the included angle between the length direction of the second drawer and the length direction of the third drawer is 90 degrees.

[0006] To solve the problems of the prior art, the present invention provides a drawer - type distribution box that is convenient for maintenance, including a plurality of boxes arranged in sequence along the vertical direction, and an opening is formed on one side of the box; A draw - out rack that can be drawn out from the opening is horizontally movably arranged inside the box. A support shaft is vertically arranged on the draw - out rack, and a first drawer, a second drawer, and a third drawer are sequentially arranged on the support shaft from bottom to top. The first drawer and the second drawer are hinged to the support shaft, and the third drawer is fixedly connected to the support shaft. When the draw - out rack is located inside the box, the length directions of the first drawer, the second drawer, and the third drawer are parallel to each other. When the draw - out rack is drawn out of the box, the included angle between the length direction of the first drawer and the length direction of the second drawer is 90 degrees, and the included angle between the length direction of the second drawer and the length direction of the third drawer is 90 degrees.

[0007] Preferably, a first push rod is vertically and fixedly arranged on the upper part of the first drawer. A first arc - shaped groove with a central angle of 90 degrees is formed around the axis of the support shaft at the lower part of the second drawer.

[0008] Preferably, a second push rod is vertically and fixedly arranged on the upper part of the second drawer. A second arc - shaped groove with a central angle of 90 degrees is formed around the axis of the support shaft at the lower part of the third drawer.

[0009] Preferably, a first gear is rotatably arranged at the bottom of the draw - out rack, and a first rack is fixedly arranged along the moving direction of the draw - out rack at the bottom inside the box. The first gear and the first rack are engaged when the draw - out rack moves. A transmission component is arranged between the first gear and the first drawer, and the first drawer is driven to rotate by the transmission component when the first gear rotates.

[0010] Preferably, a locking unit is arranged on the box, and the locking unit locks the draw - out rack when the draw - out rack is completely drawn out.

[0011] Preferably, a locking groove is horizontally formed on one side of the draw - out rack, a locking block that can be engaged and matched with the locking groove is horizontally movably arranged on the box, and a pressure unit for pushing the locking block to move towards the locking groove is arranged on one side of the locking block.

[0012] Preferably, the pressure unit includes a pressure block that moves in the vertical direction. The pressure block is located above the locking block. A connecting rod with both ends hinged to the pressure block and the locking block respectively is arranged between the pressure block and the locking block, and the connecting rod is in an inclined state.

[0013] Preferably, an unlocking unit is arranged on the upper part of the pressure block. The unlocking unit includes a traction rope with one end fixedly connected to the upper part of the pressure block, and the unlocking unit further includes a traction disc for winding the traction rope.

[0014] Preferably, a second gear is fixedly arranged at the end of the traction disc. The diameter of the second gear is smaller than that of the traction disc. A second rack that meshes with the second gear is arranged horizontally on one side of the second gear. A trigger rod is fixedly arranged along the length direction of the second rack at the end of the second rack, and the trigger rod extends from the inside of the box body to the outside of the box body.

[0015] Preferably, a spring is arranged between the end of the trigger rod located outside the box body and the side wall of the box body. Both ends of the spring are fixedly connected to the end of the trigger rod and the side wall of the box body respectively.

[0016] The beneficial effects of the present invention compared with the prior art are as follows:

[0017] 1. By providing multiple box bodies, a retractable extraction rack is arranged in the box body. At the same time, a first drawer, a second drawer and a third drawer connected to the support shaft are arranged on the extraction rack from bottom to top. The first drawer and the second drawer are hinged to the support shaft, and the third drawer is fixedly connected to the support shaft. When the extraction rack is located in the box body, the length directions of the first drawer, the second drawer and the third drawer are parallel to each other. When the extraction rack is pulled out of the box body, the included angle between the length direction of the first drawer and the length direction of the second drawer is 90 degrees, and the included angle between the length direction of the second drawer and the length direction of the third drawer is 90 degrees. In summary, on the premise of ensuring that adjacent drawers will not obstruct each other during maintenance, the present invention also avoids the need to lift the box body during maintenance and repair, has a lower requirement for the vertical height of the placement space. At the same time, the modular box body shortens the length of the support shaft, improves the anti-bending performance of the support shaft, and avoids the bending of the support shaft after long-term use.

[0018] 2. By setting the first push rod, the first arc-shaped groove, the first gear and the first rack, when the extraction rack is pulled out, the first gear drives the first drawer to rotate. The first drawer drives the first push rod to slide in the first arc-shaped groove. When the first drawer rotates 90 degrees, the first push rod moves to the end of the first arc-shaped groove. When the first drawer continues to rotate, the first push rod drives the second drawer to start rotating. When the included angle between the length direction of the first drawer and the length direction of the third drawer is 180 degrees, the first drawer stops rotating. At this time, the included angle between the length direction of the first drawer and the length direction of the second drawer is 90 degrees, and the included angle between the length direction of the second drawer and the length direction of the third drawer is 90 degrees. By rotating the first drawer 180 degrees, the second drawer can be synchronously rotated and unfolded, and there is no need to manually rotate and open all the drawers one by one during maintenance.

[0019] 3. After the extraction rack is pulled out, when the first drawer rotates and the first push rod slides in the first arc-shaped groove, the second drawer is in a stationary state, and the second push rod is located at one end of the second arc-shaped groove. When the first push rod reaches the end of the first arc-shaped groove and drives the second drawer to rotate, the second push rod arranged on the second drawer moves in the second arc-shaped groove. When the second push rod reaches the other end of the second arc-shaped groove, the first drawer stops rotating. Since the third drawer is fixedly arranged on the extraction rack, when the second drawer rotates and unfolds and drives the second push rod to move to the end of the second arc-shaped groove, the second drawer cannot rotate, ensuring the stability of the first drawer, the second drawer and the third drawer after unfolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional schematic diagram of an assembled drawer-type distribution box that is easy to maintain according to the present invention.

[0021] Figure 2 is a three-dimensional schematic of a drawer-type distribution box that is easy to maintain according to the present invention Figure 1 .

[0022] Figure 3 is a three-dimensional schematic of a drawer-type distribution box that is easy to maintain according to the present invention Figure 2 .

[0023] Figure 4 is a three-dimensional schematic of a drawer-type distribution box that is easy to maintain according to the present invention after removing the second drawer Figure 1 .

[0024] Figure 5 is a partial enlarged schematic diagram of part A in a drawer-type distribution box that is easy to maintain according to the present invention Figure 4 in.

[0025] Figure 6 is a three-dimensional schematic of a drawer-type distribution box that is easy to maintain according to the present invention after removing the second drawer Figure 2 .

[0026] Figure 7 is a partial enlarged schematic view of the B position in a drawer - type distribution box that is convenient for maintenance according to the present invention Figure 6 in the

[0027] Figure 8 is a three - dimensional schematic view of a drawer - type distribution box that is convenient for maintenance according to the present invention after removing the third drawer

[0028] Figure 9 is a three - dimensional schematic view of a drawer - type distribution box that is convenient for maintenance according to the present invention after removing the third drawer and the first drawer

[0029] Figure 10 is a three - dimensional schematic view of a drawer - type distribution box that is convenient for maintenance according to the present invention after removing the box body

[0030] Figure 11 is a Figure 10 partial enlarged schematic view of the C position in a drawer - type distribution box that is convenient for maintenance according to the present invention

[0031] Figure 12 is a Figure 10 partial enlarged schematic view of the D position in a drawer - type distribution box that is convenient for maintenance according to the present invention

[0032] Figure 13 is a sectional three - dimensional schematic view of a drawer - type distribution box that is convenient for maintenance according to the present invention after removing the third drawer

[0033] The reference numerals in the figure are as follows:

[0034] 1. Box body; 11. Opening; 2. Drawer - out rack; 21. First drawer; 211. Extension column; 212. First push rod; 22. Second drawer; 221. First arc - shaped groove; 222. Second push rod; 23. Third drawer; 223. Second arc - shaped groove; 24. Support shaft; 25. First gear; 26. First rack; 27. Transmission component; 271. Synchronous belt; 272. Synchronous pulley; 28. Locking unit; 281. Locking groove; 282. Locking block; 283. Pressure unit; 2831. Link; 2832. Pressure block; 29. Unlocking unit; 291. Traction disc; 292. Traction rope; 293. Second gear; 294. Second rack; 295. Trigger rod; 296. Spring Specific embodiments

[0035] In order to further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments

[0036] Refer to Figures 1-6:A drawer - type distribution box convenient for maintenance, comprising a plurality of boxes 1 arranged in sequence along the vertical direction. An opening 11 is provided on one side of the box 1. A drawing frame 2 capable of being drawn out from the opening 11 is horizontally movably arranged in the box 1. A support shaft 24 is vertically arranged on the drawing frame 2. A first drawer 21, a second drawer 22 and a third drawer 23 are successively arranged on the support shaft 24 from bottom to top. The first drawer 21 and the second drawer 22 are hinged to the support shaft 24, and the third drawer 23 is fixedly connected to the support shaft 24. When the drawing frame 2 is located in the box 1, the length directions of the first drawer 21, the second drawer 22 and the third drawer 23 are parallel to each other. When the drawing frame 2 is drawn out from the box 1, the included angle between the length direction of the first drawer 21 and the length direction of the second drawer 22 is 90 degrees, and the included angle between the length direction of the second drawer 22 and the length direction of the third drawer 23 is 90 degrees.

[0037] When performing maintenance on the existing drawer - type distribution box, different drawers need to be drawn out in sequence. Most of the drawers are arranged along the vertical direction. When drawing out the drawers, two adjacent drawers arranged in sequence along the vertical direction will form an obstruction. During maintenance, when the lower drawer and the upper drawer in two adjacent drawers need to be drawn out for maintenance at the same time, the upper drawer will block the lower drawer, resulting in the situation that the lower drawer cannot be maintained. To avoid the above - mentioned situation, the prior art has improved the traditional drawer - type distribution box, making the drawers in the drawer - type distribution box be drawn out in a rotating manner, and adjacent drawers will not affect each other when being rotated and drawn out at the same time. However, since the existing drawers are all rectangular structures, in order to ensure that the size of the distribution box will not be too large and at the same time ensure that the drawers can be smoothly rotated and drawn out, before rotating and drawing out the drawers, the box 1 sleeved around the drawers needs to be raised. There are usually a plurality of drawers provided on the existing drawer - type distribution box. When maintenance is required for the drawers, the higher the height where the drawers are located, the higher the height that the distribution box needs to be raised, which has a relatively high requirement for the height of the space where the drawer - type distribution box is placed, resulting in a large amount of space being occupied and wasted. At the same time, the drawers in the box 1 are all supported by the support shaft 24. Since the center of gravity of the box 1 is located on one side of the support shaft 24, the higher the height that the box 1 is raised, the greater the moment of force exerted by the box 1 on the support shaft 24, and the more likely the support shaft 24 is to be bent. Therefore, although the existing drawer - type distribution box solves the problem that when adjacent drawers are drawn out at the same time, one of the drawers cannot be maintained, it has a relatively high requirement for the height of the placement space, and the support shaft 24 is extremely likely to be bent and damaged during use.

[0038] To avoid the above situation, the existing drawer-type distribution box is further optimized and designed, so that when the drawer-type distribution box is maintained and repaired, the box body 1 does not need to be lifted, and the drawer-type distribution box is designed modularly, reducing the rotation angle of the traditional rotary extraction drawer during extraction, and at the same time reducing the load on the support shaft 24 when supporting the drawer, ensuring that the support shaft 24 is not easily bent and deformed during maintenance. The specific structure and working process of the drawer-type distribution box of the present invention are as follows:

[0039] During daily use, the extraction rack 2 is located inside the box body 1. The first drawer 21, the second drawer 22, and the third drawer 23 provided on the support shaft 24 are all located in the box body 1. The length directions of the first drawer 21, the second drawer 22, and the third drawer 23 are parallel to each other. When maintenance is required, the extraction rack 2 is pulled out from the box body 1, so that the first drawer 21 and the second drawer 22 rotate around the support shaft 24 during the extraction of the extraction rack 2. When the extraction rack 2 is completely pulled out, the first drawer 21 and the second drawer 22 complete the rotation. The first drawer 21 rotates a total of 180 degrees from the initial state to the stop of rotation, and the second drawer 22 rotates a total of 90 degrees from the initial state to the stop of rotation. Therefore, when the extraction rack 2 is completely pulled out, the included angle between the length direction of the third drawer 23 and the length direction of the second drawer 22 is 90 degrees, and the included angle between the length direction of the second drawer 22 and the length direction of the first drawer 21 is 90 degrees. Since the third drawer 23 is fixedly connected to the extraction rack 2, the third drawer 23 does not rotate when the extraction rack 2 is pulled out from the box body 1. A extension column 211 is vertically fixedly provided on the upper part of the first drawer 21. A groove is provided at the lower end of the support shaft 24. The extension column 211 extends into the groove, and the axis of the extension column 211 is collinear with the axis of the support shaft 24. The first drawer 21 can rotate around the support shaft 24 when it needs to rotate. After the extraction rack 2 is completely pulled out, there are no obstacles on the upper parts of the first drawer 21, the second drawer 22, and the third drawer 23, and the staff can perform maintenance operations on the first drawer 21, the second drawer 22, and the third drawer 23 at the same time. It should be noted that during the extraction of the extraction rack 2, when the end face of the first drawer 21 facing the inner side of the box body 1 is coplanar with the end face at the opening 11 of the box body 1, the first drawer 21 can start to rotate, and the second drawer 22 is the same as the first drawer 21. After the maintenance is completed, the first drawer 21 and the second drawer 22 are rotated back to their original positions, and at the same time, the extraction rack 2 is pushed back into the box body 1 to complete the maintenance.

[0040] By arranging a plurality of boxes 1, arranging a retractable rack 2 inside the box 1, and arranging a first drawer 21, a second drawer 22 and a third drawer 23 connected to a support shaft 24 from bottom to top on the retractable rack 2. The first drawer 21 and the second drawer 22 are hinged to the support shaft 24, and the third drawer 23 is fixedly connected to the support shaft 24. When the retractable rack 2 is located inside the box 1, the length directions of the first drawer 21, the second drawer 22 and the third drawer 23 are parallel to each other. When the retractable rack 2 is pulled out of the box 1, the included angle between the length direction of the first drawer 21 and the length direction of the second drawer 22 is 90 degrees, and the included angle between the length direction of the second drawer 22 and the length direction of the third drawer 23 is 90 degrees. In summary, on the premise of ensuring that adjacent drawers will not obstruct each other during maintenance, the present invention also avoids the need to lift the box 1 during maintenance and repair, has a relatively low requirement for the vertical height of the placement space. At the same time, the modular box 1 shortens the length of the support shaft 24, improves the bending resistance of the support shaft 24, and avoids the situation that the support shaft 24 bends after long-term use.

[0041] Refer to Figure 5 、 Figure 9 and Figure 13 : A first push rod 212 is vertically and fixedly arranged on the upper part of the first drawer 21. A first arc-shaped groove 221 is formed around the axis of the support shaft 24 at the lower part of the second drawer 22, and the central angle of the first arc-shaped groove 221 is 90 degrees.

[0042] By arranging the first push rod 212 and the first arc-shaped groove 221, when the retractable rack 2 is pulled out, the first drawer 21 is rotated. The first drawer 21 drives the first push rod 212 to slide in the first arc-shaped groove 221. When the first drawer 21 rotates 90 degrees, the first push rod 212 moves to the end of the first arc-shaped groove 221. When the first drawer 21 continues to rotate, the first push rod 212 drives the second drawer 22 to start rotating. When the included angle between the length direction of the first drawer 21 and the length direction of the third drawer 23 is 180 degrees, the first drawer 21 stops rotating. At this time, the included angle between the length direction of the first drawer 21 and the length direction of the second drawer 22 is 90 degrees, and the included angle between the length direction of the second drawer 22 and the length direction of the third drawer 23 is 90 degrees. By rotating the first drawer 21 by 180 degrees, the second drawer 22 can be synchronously rotated and unfolded, and there is no need to manually rotate and open all the drawers one by one during maintenance.

[0043] Refer to Figure 7 and Figure 8 : A second push rod 222 is vertically and fixedly arranged on the upper part of the second drawer 22. A second arc-shaped groove 223 is formed around the axis of the support shaft 24 at the lower part of the third drawer 23, and the central angle of the second arc-shaped groove 223 is 90 degrees.

[0044] After the extraction rack 2 is extracted, when the first drawer 21 rotates and the first push rod 212 slides in the first arc-shaped groove 221, the second drawer 22 is in a stationary state, and the second push rod 222 is located at one end of the second arc-shaped groove 223. When the first push rod 212 reaches the end of the first arc-shaped groove 221 and drives the second drawer 22 to rotate, the second push rod 222 provided on the second drawer 22 moves in the second arc-shaped groove 223. When the second push rod 222 reaches the other end of the second arc-shaped groove 223, the first drawer 21 stops rotating. Since the third drawer 23 is fixedly arranged on the extraction rack 2, when the second drawer 22 rotates and unfolds and drives the second push rod 222 to move to the end of the second arc-shaped groove 223, the second drawer 22 cannot rotate. If the second push rod 222 and the second arc-shaped groove 223 are not provided, although the second drawer 22 cannot rotate and reset, it can still rotate towards the first drawer 21, resulting in the second drawer 22 freely rotating to block the upper part of the first drawer 21 during maintenance, which is not convenient for maintenance and repair.

[0045] Refer to Figure 9 and Figure 10 : A first gear 25 is rotatably arranged at the bottom of the extraction rack 2, and a first rack 26 is fixedly arranged at the bottom in the box body 1 along the moving direction of the extraction rack 2. The first gear 25 and the first rack 26 are engaged when the extraction rack 2 moves. A transmission assembly 27 is arranged between the first gear 25 and the first drawer 21. When the first gear 25 rotates, it drives the first drawer 21 to rotate through the transmission assembly 27.

[0046] The transmission assembly 27 includes two synchronous pulleys 272. The two synchronous pulleys 272 are respectively fixedly arranged at the end of the first gear 25 and the bottom of the first drawer 21. A synchronous belt 271 is sleeved on the two synchronous pulleys 272, and the synchronous belt 271 is respectively in transmission cooperation with the two synchronous pulleys 272. When the extraction rack 2 is extracted, when the end face of the third drawer 23 facing the box body 1 is coplanar with the end face of the opening 11 provided on the box body 1, the first gear 25 and the first rack 26 start to engage, and the first gear 25 drives the first drawer 21 to rotate through the transmission assembly 27. When the extraction rack 2 is completely extracted, the first drawer 21 rotates 180 degrees. By arranging the first gear 25, the first rack 26 and the transmission assembly 27, during the process of pulling out the extraction rack 2, the first drawer 21 can rotate by itself, thereby driving the second drawer 22 to rotate. When the extraction rack 2 is completely extracted, the first drawer 21 and the second drawer 22 automatically unfold, without the need to manually rotate the first drawer 21, improving the efficiency during maintenance and repair.

[0047] Conversely, when the maintenance is completed and the extraction rack 2 is pushed into the box body 1, the first gear 25 rotates reversely under the action of the first rack 26, so that the first drawer 21 rotates reversely and drives the second drawer 22 to rotate and reset together. When the first drawer 21 drives the second drawer 22 to rotate and reset, when the included angle between the length direction of the first drawer 21 and the length direction of the third drawer 23 is 90 degrees, the first drawer 21 starts to drive the second drawer 22 to rotate and reset.

[0048] Refer to Figure 10 : A locking unit 28 is provided on the box body 1, and when the extraction rack 2 is fully extracted, the locking unit 28 locks the extraction rack 2.

[0049] Refer to Figure 10 and Figure 12 : A locking groove 281 is horizontally opened on one side of the extraction rack 2, and a locking block 282 that can be engaged and matched with the locking groove 281 is horizontally movably provided on the box body 1. A pressure unit 283 for pushing the locking block 282 to move towards the locking groove 281 is provided on one side of the locking block 282.

[0050] Refer to Figure 12 : The pressure unit 283 includes a pressure block 2832 that moves in the vertical direction. The pressure block 2832 is located above the locking block 282. A connecting rod 2831 whose two ends are respectively hinged to the two is provided between the pressure block 2832 and the locking block 282, and the connecting rod 2831 is in an inclined state.

[0051] The pressure block 2832 generates an extrusion force on the locking block 282 through the connecting rod 2831. When the extraction rack 2 is not extracted, the locking block 282 abuts against the side wall of the extraction rack 2. When the extraction rack 2 is extracted, the extraction rack 2 drives the locking groove 281 to move. When the locking groove 281 and the locking block 282 coincide with each other, the pressure block 2832 pushes the locking block 282 into the locking groove 281 through the connecting rod 2831, so that the locking block 282 engages with the locking groove 281, ensuring that the extraction rack 2 will not retract into the box body 1 due to external force when being extracted, and thus ensuring the stability of the maintenance and repair process.

[0052] Refer to Figure 4 and Figure 11 : An unlocking unit 29 is provided on the upper part of the pressure block 2832. The unlocking unit 29 includes a traction rope 292 whose one end is fixedly connected to the upper part of the pressure block 2832. The unlocking unit 29 further includes a traction disc 291 for winding the traction rope 292.

[0053] After the maintenance and repair are completed, by rotating the traction disc 291, the traction rope 292 drives the pressure block 2832 to rise, so that the locking block 282 slides out of the locking groove 281. At this time, the locking block 282 releases the locking of the extraction rack 2, and the extraction rack 2 can be pushed into the box body 1.

[0054] Reference Figure 11 : A second gear 293 is fixedly arranged at the end of the traction disc 291. The diameter of the second gear 293 is smaller than that of the traction disc 291. A second rack 294 meshing with the second gear 293 is horizontally movably arranged on one side of the second gear 293. A trigger rod 295 is fixedly arranged at the end of the second rack 294 along the length direction of the second rack 294. The trigger rod 295 extends from the inside of the box body 1 to the outside of the box body 1.

[0055] Reference Figure 11 : A spring 296 is arranged between the end of the trigger rod 295 outside the box body 1 and the side wall of the box body 1. The two ends of the spring 296 are respectively fixedly connected to the end of the trigger rod 295 and the side wall of the box body 1.

[0056] When unlocking, press the trigger rod 295. The trigger rod 295 drives the second rack 294 to move. The second rack 294 drives the second gear 293 to rotate, and then the traction disc 291 rotates synchronously. The traction disc 291 winds up the traction rope 292. The wound traction rope 292 lifts the pressure block 2832. After pushing the extraction rack 2 into the box body 1, the trigger rod 295 can be released. The spring 296 drives the trigger rod 295 to reset. The second gear 293 drives the traction disc 291 to release the traction rope 292. The pressure block 2832 uses its own gravity to generate a thrust on the locking block 282 again through the connecting rod 2831. When the extraction rack 2 is extracted again, the locking block 282 can be engaged with the locking groove 281 again.

[0057] Working principle: During daily use, the extraction rack 2 is located inside the box body 1. The first drawer 21, the second drawer 22, and the third drawer 23 provided on the support shaft 24 are all located in the box body 1. The length directions of the first drawer 21, the second drawer 22, and the third drawer 23 are parallel to each other. When maintenance is required, the extraction rack 2 is pulled out from the box body 1, so that the first drawer 21 and the second drawer 22 rotate around the support shaft 24 during the extraction of the extraction rack 2. When the extraction rack 2 is completely pulled out, the first drawer 21 and the second drawer 22 complete the rotation. The first drawer 21 rotates a total of 180 degrees from the initial state to the stop of rotation, and the second drawer 22 rotates a total of 90 degrees from the initial state to the stop of rotation. Therefore, when the extraction rack 2 is completely pulled out, the included angle between the length direction of the third drawer 23 and the length direction of the second drawer 22 is 90 degrees, and the included angle between the length direction of the second drawer 22 and the length direction of the first drawer 21 is 90 degrees. Since the third drawer 23 is fixedly connected to the extraction rack 2, the third drawer 23 does not rotate when the extraction rack 2 is pulled out from the box body 1. A extension column 211 is vertically fixedly arranged on the upper part of the first drawer 21. A groove is opened at the lower end of the support shaft 24. The extension column 211 extends into the groove. The axis of the extension column 211 is collinear with the axis of the support shaft 24. The first drawer 21 can rotate around the support shaft 24 when it needs to rotate. After the extraction rack 2 is completely pulled out, there are no obstacles on the upper parts of the first drawer 21, the second drawer 22, and the third drawer 23. The staff can perform maintenance operations on the first drawer 21, the second drawer 22, and the third drawer 23 at the same time. It should be noted that during the extraction of the extraction rack 2, when the end face of the first drawer 21 facing the inner side of the box body 1 is coplanar with the end face at the opening 11 of the box body 1, the first drawer 21 can start to rotate. The same is true for the second drawer 22 and the first drawer 21. After the maintenance is completed, the first drawer 21 and the second drawer 22 are rotated back to their original positions, and at the same time, the extraction rack 2 is pushed back into the box body 1 to complete the maintenance.

[0058] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A drawer - type distribution box convenient for maintenance, comprising a plurality of boxes (1) arranged in sequence along the vertical direction, and an opening (11) is formed on one side of the box (1); Characterized in that, An extraction rack (2) that can be extracted from the opening (11) is horizontally movably arranged in the box (1). A support shaft (24) is vertically arranged on the extraction rack (2). A first drawer (21), a second drawer (22) and a third drawer (23) are sequentially arranged on the support shaft (24) from bottom to top. The first drawer (21) and the second drawer (22) are hinged to the support shaft (24), and the third drawer (23) is fixedly connected to the support shaft (24). When the extraction rack (2) is located in the box (1), the length directions of the first drawer (21), the second drawer (22) and the third drawer (23) are parallel to each other. When the extraction rack (2) is extracted from the box (1), the included angle between the length direction of the first drawer (21) and the length direction of the second drawer (22) is 90 degrees, and the included angle between the length direction of the second drawer (22) and the length direction of the third drawer (23) is 90 degrees.

2. The drawer-type distribution box convenient for maintenance according to claim 1, wherein, A first push rod (212) is vertically and fixedly arranged on the upper part of the first drawer (21). A first arc - shaped groove (221) with a central angle of 90 degrees is formed around the axis of the support shaft (24) on the lower part of the second drawer (22).

3. The drawer-type distribution box convenient for maintenance according to claim 2, characterized in that, A second push rod (222) is vertically and fixedly arranged on the upper part of the second drawer (22). A second arc - shaped groove (223) with a central angle of 90 degrees is formed around the axis of the support shaft (24) on the lower part of the third drawer (23).

4. The drawer-type distribution box convenient for maintenance according to claim 2, wherein A first gear (25) is rotatably arranged at the bottom of the extraction rack (2). A first rack (26) is fixedly arranged along the moving direction of the extraction rack (2) at the bottom inside the box (1). The first gear (25) and the first rack (26) are meshed when the extraction rack (2) moves. A transmission component (27) is arranged between the first gear (25) and the first drawer (21). When the first gear (25) rotates, the first drawer (21) is driven to rotate through the transmission component (27).

5. A drawer-type distribution box that is easy to maintain according to claim 1, characterized in that, A locking unit (28) is arranged on the box (1). When the extraction rack (2) is completely extracted, the locking unit (28) locks the extraction rack (2).

6. The drawer-type distribution box convenient for maintenance according to claim 5, wherein, A locking groove (281) is horizontally formed on one side of the extraction rack (2). A locking block (282) that can be in snap - fit connection with the locking groove (281) is horizontally movably arranged on the box (1). A pressure unit (283) for pushing the locking block (282) to move towards the locking groove (281) is arranged on one side of the locking block (282).

7. The drawer-type distribution box convenient for maintenance according to claim 6, wherein, The pressure unit (283) includes a pressure block (2832) that moves along the vertical direction. The pressure block (2832) is located above the locking block (282). A connecting rod (2831) whose two ends are respectively hinged to the pressure block (2832) and the locking block (282) is arranged between the pressure block (2832) and the locking block (282), and the connecting rod (2831) is in an inclined state.

8. A drawer-type distribution box that is easy to maintain according to claim 7, characterized in that, An unlocking unit (29) is provided on the upper part of the pressure block (2832). The unlocking unit (29) includes a traction rope (292) with one end fixedly connected to the upper part of the pressure block (2832). The unlocking unit (29) further includes a traction disc (291) for winding the traction rope (292).

9. The drawer-type distribution box convenient for maintenance according to claim 8, characterized in that, A second gear (293) is fixedly provided at the end of the traction disc (291). The diameter of the second gear (293) is smaller than that of the traction disc (291). A second rack (294) meshing with the second gear (293) is horizontally movably arranged on one side of the second gear (293). A trigger rod (295) is fixedly provided at the end of the second rack (294) along the length direction of the second rack (294). The trigger rod (295) extends from the inside of the box body (1) to the outside of the box body (1).

10. A drawer-type power distribution box that is easy to maintain according to claim 9, characterized in that, A spring (296) is provided between the end of the trigger rod (295) outside the box body (1) and the side wall of the box body (1). The two ends of the spring (296) are respectively fixedly connected to the end of the trigger rod (295) and the side wall of the box body (1).

Images