Extensible assembly type distribution box

Abstract

The invention belongs to the technical field of power distribution boxes, and discloses an extensible assembly type power distribution box which comprises a fixed box, extension assemblies are arranged on the inner wall and the bottom of the fixed box, each extension assembly comprises a double-layer winch, two twisted ropes are wound around a groove of each double-layer winch, and a movable plate is installed at the end, away from the corresponding double-layer winch, of each twisted rope. And adjusting ropes are rotatably connected to the inner sides of the two ends of the movable plate, an expansion box is slidably arranged on the outer side of the fixed box, and four sets of sliding supports are installed on the inner side of the lower end of the expansion box. The problem that the expansion box cannot stably ascend due to friction force between the expansion box and the outer side of the fixed box caused by non-uniform force application is effectively avoided, meanwhile, the vertical arrangement area can be effectively increased by arranging the vertically-expanded expansion box, and the number of installed modular electrical equipment is effectively increased; and different mounting requirements are effectively met.

Description

An expandable prefabricated distribution box Technical Field

[0001] This invention belongs to the field of distribution box technology, specifically an expandable prefabricated distribution box. Background Technology

[0002] Prefabricated distribution boxes are common power distribution devices in electrical equipment. They provide installation locations and protection for the modular electrical equipment inside, and are easy to install and use, effectively extending the service life of the modular electrical equipment.

[0003] For example, utility model CN221428366U discloses an expandable low-voltage distribution box, which solves the problems of limited space expansion and poor ventilation in the prior art. The box includes a housing, inside which a telescopic cabinet is slidably mounted. A pad is fixedly connected to the bottom of the telescopic cabinet by screws. A support plate is slidably mounted inside the housing, and the bottom of the support plate is fixedly connected to several locking teeth by screws, one end of each locking tooth being inclined. A stop block is slidably mounted inside the telescopic cabinet, one end of which is also inclined. A guide rod is fixedly connected to the bottom of the stop block by screws. Through the setting of pressure plates and pull rods, when expansion is needed, the telescopic cabinet can be pulled to one side by simply pulling the handle. Because the inclined surface of the stop block pushes the support plate upwards through the locking teeth, the telescopic cabinet can be stretched, achieving a convenient expansion effect.

[0004] In existing technology, distribution boxes can be expanded laterally by using a pull-out mechanism. However, existing modular electrical equipment is usually arranged vertically when installed inside the distribution box. Lateral expansion cannot directly install modular electrical equipment. Direct arrangement will cause obstruction and make it impossible to adjust the internal modular electrical equipment. Moreover, during the adjustment process, due to the friction between the boxes, uneven application of force will cause friction jamming. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides an expandable prefabricated distribution box, which solves the problems that existing devices cannot be directly installed with modular electrical equipment when expanded laterally, that direct arrangement will cause obstruction and make it impossible to adjust the internal modular electrical equipment, and that uneven application of force during adjustment will cause frictional jamming.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an expandable prefabricated distribution box, comprising a fixed box, wherein the inner wall and bottom of the fixed box are provided with an expansion component; the expansion component includes a double-layer winch, wherein two sets of twisted ropes are wound around the groove of the double-layer winch, a movable plate is installed at the end of the twisted rope away from the double-layer winch, and an adjusting rope is rotatably connected to the inner side of both ends of the movable plate; an expansion box is slidably disposed on the outer side of the fixed box, four sets of sliding brackets are installed on the inner side of the lower end of the expansion box, the sliding brackets are fixedly connected to the end of the adjusting rope away from the movable plate, and several sets of auxiliary guide wheels are rotatably disposed on the inner side of the bottom and upper end of the fixed box, wherein the twisted rope and the adjusting rope are movably disposed on the outer side of the auxiliary guide wheels.

[0007] Preferably, a combined bearing is installed on the top of the double-layer winch, and the combined bearing is fixedly installed on the inner side of the lower end of the fixed box. A movable ring is slidably arranged on the inner side of the double-layer winch, and several sets of top rods are installed on the top and bottom of the movable ring.

[0008] Preferably, the fixed box has four sets of limiting grooves on its side, the sliding bracket is slidably disposed inside the limiting grooves, two sets of limiting guide rails are respectively installed on both sides inside the fixed box, the movable plate is slidably disposed outside the limiting guide rails, several sets of compression springs are embedded inside the lower end of the fixed box, and an elastic block is provided at the bottom of the compression spring. The elastic block is movably inserted into the inner side of the double-layer winch. Two sets of combined pull-out brackets are installed inside the fixed box and the expansion box, and several sets of positioning holes are opened on the side of the combined pull-out brackets.

[0009] Preferably, a flexible adjustment assembly is installed at the bottom of the double-layer winch; the flexible adjustment assembly includes a fixed plate, which is rotatably connected to the bottom of the double-layer winch via bearings, and a flipping bracket is rotatably arranged on both sides of the fixed plate. A rotating sleeve is rotatably arranged in the middle of the flipping bracket, and a plug rod is installed in the middle of the rotating sleeve. The plug rod is movably inserted into the inner side of the double-layer winch. Connecting frames are connected to both ends of the two sets of rotating sleeves. Sliding grooves are opened on both sides of the flipping bracket, and the rotating sleeve is slidably arranged inside the sliding groove.

[0010] Preferably, the fixed plate is rotatably provided with flip-down pressure plates on both sides, and the flip-down pressure plates are movably disposed on the top of the connecting frame. The bottom of the fixed plate is provided with a fixed bracket, and the top of both ends of the fixed bracket is provided with a fixed rod. The fixed rod is slidably disposed on the inner side of the insertion rod. The rotating sleeve and the fixed bracket are elastically connected by a return spring.

[0011] Preferably, a linkage adjustment assembly is rotatably provided on the front side of one side of the fixed box; the linkage adjustment assembly includes a movable door panel, four sets of rotating columns are rotatably provided on the inner side of the upper end of the movable door panel, and a rotating plate is installed on the top of the rotating columns. A set of rotating connecting plates is rotatably connected between the four sets of rotating plates. A torsion spring is sleeved on the outer side of the rotating columns, and a spiral column is rotatably provided on the inner side of the lower end of the rotating columns. A stabilizing slider is installed at the bottom of the spiral column, and the stabilizing slider is slidably provided on the inner side of the upper end of the movable door panel. A pressing rod is installed at the bottom of the stabilizing slider.

[0012] Preferably, the linkage adjustment component includes a fixed door panel, which is slidably sleeved on the outer side of the lower end of the movable door panel. An arc-shaped buckle is rotatably provided on the inner side of the lower end of the fixed door panel, and a drive plate is rotatably provided on the top of one side of the arc-shaped buckle. Limiting frames are rotatably provided at both ends of the drive plate. The limiting frames are fixedly installed at the bottom of the pressing rod and the top of the arc-shaped buckle. Several sets of arc-shaped slots are opened on one side inside the fixed door panel.

[0013] Preferably, a plurality of adjusting plates are slidably arranged between the two sets of combined pull-out frames. An adjusting knob is rotatably arranged on the inner side of the middle of the adjusting plate, and a reverse screw is provided at both ends of the adjusting knob. A stabilizing insert plate is installed on both sides of the adjusting plate, and a sliding support plate is rotatably arranged on the outer side of the end of the reverse screw. The stabilizing insert plate is slidably inserted into the inner side of the sliding support plate.

[0014] Preferably, an auxiliary handle is slidably provided on the inner side of the sliding support plate away from the adjusting plate. Two sets of positioning rods are installed on the side of the auxiliary handle away from the adjusting plate, and the positioning rods are movably inserted into the inner side of the positioning holes. The side of the auxiliary handle away from the positioning rods is elastically connected to the sliding support plate through a support spring.

[0015] A method for using an expandable prefabricated distribution box: S1. Grasp the handle structure at the front end of the flip-down pressure plate according to the expansion requirements, and then control the flip-down pressure plate to flip along the fixed plate. After the angle adjustment is completed, the expanded flip-down pressure plate will flip and lift along the fixed plate. The connecting frame will lose the pressure of the flip-down pressure plate. Under the push of two sets of return springs, the rotating sleeve and the flip bracket will flip along the connection area of ​​the fixed plate. After flipping, keep the flip bracket in a horizontal state, and the plug at the top of the rotating sleeve will be vertically inserted into the hole of the double-layer winch, and push the top movable ring and the top rod to lift. During the lifting process, the elastic block will be pushed into the bottom of the fixed box. Then, the double-layer winch will be rotated and adjusted by the flip-down pressure plate; S2. Adjust 90 degrees at a time. During the adjustment process, the double-layer winch will pull the winch rope. Under the guidance of the auxiliary guide wheel, the movable plate at the end can be pulled to slide down along the limit guide rail. During the sliding process, the movable plate will pull the two sets of adjustment ropes along the auxiliary guide wheel to drive the sliding bracket at the end to rise along the limit groove. During the rise, the expansion box will be driven to move along the limit groove. S3. During the lifting process, the box door is in a closed state. When the rotating connecting plate approaches the box body, it will push the rotating plate to flip along the rotating column. When flipping, under the action of the spiral column, the spiral column will move steadily upward in conjunction with the stabilizing slider. During the movement, the bottom squeezing rod will pull the bottom limit frame to rise. Under the control of the drive plate, the arc-shaped buckle can be pulled to rotate along the rotating shaft area. The rotation will separate it from the arc-shaped slot. After separation, when adjusting the expansion box, the movable door plate will be adjusted simultaneously. S4. After the adjustment is completed, according to the modules to be installed, simultaneously grasp the two sets of auxiliary handles to compress the support spring. After compression, the positioning rod will retract and separate from the positioning hole. After separation, the height can be adjusted by moving the sliding support plate and the adjustment plate as a whole to change the range to adapt to the installation of different modules. S5. When assembling the distribution box before use, grasp the adjustment knob to drive the reverse screw to rotate. During the rotation, under the action of the thread, the sliding support plate will be extended and retracted to adjust the position of the positioning hole in the combined pull-out bracket.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up expansion components and expansion boxes, the present invention facilitates the adjustment of the height of the movable plate by simultaneously driving the winch rope through a double-layer winch. The transmission can then drive four sets of adjusting ropes through the movable plate to pull the expansion box upward. The four sets of sliding brackets located in the corner areas of the expansion box distribute the weight of the expansion box and effectively increase the uniformity of the pulling force. This effectively avoids the problem of uneven force application causing friction between the expansion box and the outside of the fixed box, which prevents the expansion box from rising stably. At the same time, by setting up vertically extended expansion boxes, the vertical arrangement area can be effectively increased, effectively increasing the number of modular electrical equipment installed and effectively adapting to different installation needs.

[0017] This invention, through the combination of flexible adjustment components and expansion components, facilitates the rotation adjustment of the double-layer winch by downward oscillation. The fixed plate rotates along the bottom of the double-layer winch via bearings to change the position of the insertion rod. Then, lifting releases the downward pressure on the connecting frame, and the return spring pushes the flipping bracket and rotating sleeve upward. The insertion rod of the rotating sleeve pushes the movable ring inside the double-layer winch to rise, and the elastic blocks are squeezed and retracted into the fixed box. This effectively releases the double-layer winch from its locked state. Then, applying a flipping force drives the double-layer winch to rotate. This method achieves self-locking and automatic unlocking, making it convenient for operators to use.

[0018] This invention, through the coordination of a linkage adjustment component and an expansion box, facilitates the simultaneous expansion of the box door structure during expansion box adjustment. During door closing, the rotating plate drives the rotating column to rotate, which in turn causes the spiral column to rise. Simultaneously, the pressing rod pulls the arc-shaped latch back to its original position, releasing it from the arc-shaped slot and unlocking it. After unlocking, the movable door panel rises synchronously during expansion box lifting. The linkage adjustment component allows for simultaneous adjustment during expansion box lifting, effectively improving the adjustment efficiency while reducing worker workload. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the cross-sectional structure of the extended component of the present invention; Figure 3 is a schematic diagram of the enlarged structure at point B in Figure 2 of the present invention; Figure 4 is a schematic diagram of the enlarged structure at point C in Figure 2 of the present invention; Figure 5 is a schematic diagram of the enlarged structure at point D in Figure 4 of the present invention; Figure 6 is a schematic diagram of the cross-sectional structure of the double-layer winch of the present invention; Figure 7 is a schematic diagram of the enlarged structure at point E in Figure 6 of the present invention; Figure 8 is a schematic diagram of the cross-sectional structure of the flipping pressure plate of the present invention; Figure 9 is a schematic diagram of the enlarged structure at point F in Figure 1 of the present invention; Figure 10 is a schematic diagram of the enlarged cross-sectional structure of the fixed door panel of the present invention; Figure 11 is a schematic diagram of the cross-sectional structure of the sliding support plate of the present invention; Figure 12 is a schematic diagram of the enlarged structure at point A in Figure 1 of the present invention.

[0020] In the diagram: 100, Fixed box; 101, Limiting groove; 102, Expansion box; 103, Sliding bracket; 104, Limiting guide rail; 105, Auxiliary guide wheel; 106, Compression spring; 107, Elastic block; 108, Combined pull-out bracket; 109, Positioning hole; 001, Expansion assembly; 200, Adjusting rope; 201, Combined bearing; 202, Double-layer winch; 203, Movable ring; 204, Winding rope; 205, Movable plate; 206, Top rod; 002, Flexible adjustment assembly; 300, Insert rod; 301, Fixed plate; 302, Flipping bracket; 303, Rotating sleeve; 304, Sliding groove; 305, Fixed bracket; 306, Reset. Spring; 307, Fixed rod; 308, Connecting frame; 309, Flip-down pressure plate; 003, Linkage adjustment assembly; 400, Spiral column; 401, Movable door panel; 402, Rotating column; 403, Rotating plate; 404, Rotating connecting plate; 405, Torsion spring; 406, Stabilizing slider; 407, Pressing rod; 500, Arc-shaped buckle; 501, Limiting frame; 502, Drive plate; 503, Fixed door panel; 504, Arc-shaped slot; 600, Sliding support plate; 601, Adjusting plate; 602, Adjusting knob; 603, Reverse lead screw; 604, Stabilizing insert plate; 605, Support spring; 606, Auxiliary handle; 607, Positioning rod. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] As shown in Figures 1 to 12, the present invention provides an expandable prefabricated distribution box, including a fixed box 100. An expansion component 001 is provided on the inner wall and bottom of the fixed box 100. The expansion component 001 includes a double-layer winch 202. Two sets of winch ropes 204 are wound around the groove of the double-layer winch 202. A movable plate 205 is installed at the end of the winch rope 204 away from the double-layer winch 202. An adjusting rope 200 is rotatably connected to the inner side of both ends of the movable plate 205. An expansion box 102 is slidably arranged on the outer side of the fixed box 100. Four sets of sliding brackets 103 are installed on the inner side of the lower end of the expansion box 102. The sliding brackets 103 are fixedly connected to the end of the adjusting rope 200 away from the movable plate 205. Several sets of auxiliary guide wheels 105 are rotatably arranged on the inner side of the bottom and upper end of the fixed box 100. The winch ropes 204 and the adjusting ropes 200 are movably arranged on the outer side of the auxiliary guide wheels 105.

[0023] A combined bearing 201 is installed on the top of the double-layer winch 202, and the combined bearing 201 is fixedly installed on the inner side of the lower end of the fixed box 100. A movable ring 203 is slidably arranged on the inner side of the double-layer winch 202, and several sets of top rods 206 are installed on the top and bottom of the movable ring 203.

[0024] The fixed box 100 has four sets of limiting grooves 101 on its side. The sliding bracket 103 is slidably disposed inside the limiting grooves 101. Two sets of limiting guide rails 104 are installed on both sides of the inside of the fixed box 100. The movable plate 205 is slidably disposed outside the limiting guide rails 104. Several sets of compression springs 106 are embedded in the lower end of the fixed box 100. The bottom of the compression springs 106 is provided with elastic blocks 107. The elastic blocks 107 are movably inserted into the inside of the double-layer winch 202. Two sets of combined pull-out brackets 108 are installed on the inside of the fixed box 100 and the expansion box 102. Several sets of positioning holes 109 are opened on the side of the combined pull-out brackets 108.

[0025] Using the above scheme: the fixed box 100 can provide support for the top structure; the limiting groove 101 can restrict the sliding bracket 103, thereby effectively ensuring the stability of the sliding adjustment; the limiting guide rail 104 can restrict the movable plate 205; the compression spring 106 can push the elastic block 107 outward, and the outward extension can be embedded in the inner side of the double-layer winch 202 for locking; and the elasticity of the compression spring 106 is much smaller than the elastic force of the return spring 306; the combined pull-out bracket 108 can provide support for the sliding support plate 600. For restriction, the positioning hole 109 facilitates the insertion of the positioning rod 607 for restriction. Two sets of auxiliary guide wheels 105 are set at the bottom and side of the winch 204, and the other auxiliary guide wheel 105 is set at the top of the adjusting rope 200. The winch 204 can be adjusted by rotating the double-layer winch 202. The top rod 206 can be adjusted synchronously by using the movable ring 203. Under the push of the elastic block 107, the movable ring 203 will slide along the inner side of the double-layer winch 202 to ensure that the flexible adjustment component 002 can be flexibly unlocked and locked.

[0026] As shown in Figures 6-8, a flexible adjustment component 002 is installed at the bottom of the double-layer winch 202. The flexible adjustment component 002 includes a fixed plate 301, which is rotatably connected to the bottom of the double-layer winch 202 via bearings. A flipping bracket 302 is rotatably arranged on both sides of the fixed plate 301. A rotating sleeve 303 is rotatably arranged in the middle of the flipping bracket 302, and an insertion rod 300 is installed in the middle of the rotating sleeve 303. The insertion rod 300 is movably inserted into the inner side of the double-layer winch 202. A connecting frame 308 is connected to both ends of the two sets of rotating sleeves 303. Sliding grooves 304 are opened on both sides of the flipping bracket 302, and the rotating sleeves 303 are slidably arranged inside the sliding grooves 304.

[0027] The fixed plate 301 is rotatably provided with flip-down pressure plates 309 on both sides, and the flip-down pressure plates 309 are movably provided on the top of the connecting frame 308. The fixed plate 301 is provided with a fixed bracket 305 at the bottom, and fixed rods 307 are provided on the top of both ends of the fixed bracket 305. The fixed rods 307 are slidably provided on the inner side of the insertion rod 300. The rotating sleeve 303 and the fixed bracket 305 are elastically connected by a return spring 306.

[0028] Using the above scheme: the fixed plate 301 is connected to the double-layer winch 202 through the bearing and can be rotated and adjusted. The flip bracket 302 can be used for flipping and fine adjustment. The sliding groove 304 can be used to assist the rotating sleeve 303 in sliding and fine adjustment. Since the rotating sleeve 303 is connected through the connecting frame 308 and is restricted by the bottom fixed rod 307, the insertion rod 300 can always remain vertically upward. The flip pressure plate 309 can be used to push the connecting frame 308 downward by pressing down. During the movement, the rotating sleeve 303 will compress the bottom return spring 306 structure. The return spring 306 can push the connecting frame 308 to rise and reset when the flip pressure plate 309 is horizontal. After reset, the insertion rod 300 can be used to squeeze the top rod 206 to unlock.

[0029] As shown in Figure 9-12, a linkage adjustment assembly 003 is rotatably installed on the front side of one side of the fixed box 100. The linkage adjustment assembly 003 includes a movable door panel 401. Four sets of rotating columns 402 are rotatably installed on the inner side of the upper end of the movable door panel 401, and a rotating plate 403 is installed on the top of the rotating column 402. A set of rotating connecting plates 404 is rotatably connected between the four sets of rotating plates 403. A torsion spring 405 is sleeved on the outer side of the rotating column 402. A spiral column 400 is rotatably installed on the inner side of the lower end of the rotating column 402. A stabilizing slider 406 is installed at the bottom of the spiral column 400, and the stabilizing slider 406 is slidably installed on the inner side of the upper end of the movable door panel 401. A pressing rod 407 is installed at the bottom of the stabilizing slider 406.

[0030] The linkage adjustment component 003 includes a fixed door panel 503, which is slidably sleeved on the outer side of the lower end of the movable door panel 401. An arc-shaped buckle 500 is rotatably provided on the inner side of the lower end of the fixed door panel 503, and a drive plate 502 is rotatably provided on the top of one side of the arc-shaped buckle 500. Limiting frames 501 are rotatably provided at both ends of the drive plate 502. The limiting frames 501 are fixedly installed at the bottom of the pressing rod 407 and the top of the arc-shaped buckle 500. Several sets of arc-shaped slots 504 are opened on one side inside the fixed door panel 503.

[0031] Several sets of adjustment plates 601 are slidably arranged between the two sets of combined pull-out brackets 108. An adjustment knob 602 is rotatably arranged on the inner side of the middle of the adjustment plate 601, and a reverse screw 603 is provided at both ends of the adjustment knob 602. A stabilizing insert plate 604 is installed on both sides of the adjustment plate 601. A sliding support plate 600 is rotatably arranged on the outer side of the end of the reverse screw 603. The stabilizing insert plate 604 is slidably inserted into the inner side of the sliding support plate 600.

[0032] An auxiliary handle 606 is slidably provided on the inner side of the sliding support plate 600 away from the adjusting plate 601. Two sets of positioning rods 607 are installed on the side of the auxiliary handle 606 away from the adjusting plate 601, and the positioning rods 607 are movably inserted into the inner side of the positioning hole 109. The side of the auxiliary handle 606 away from the positioning rods 607 is elastically connected to the sliding support plate 600 through a support spring 605.

[0033] The above scheme is adopted: the movable door panel 401 and the expansion box 102 are hinged, the fixed door panel 503 and the fixed box 100 are hinged, the rotating connecting plate 404 is used to connect the four sets of rotating plates 403, so that the rotating plates 403 can be adjusted synchronously along the rotating column 402. The rotating column 402 can rotate to compress the torsion spring 405 structure. The torsion spring 405 can push the rotating column 402 to reset without applying pressure. The rotating column 402 and the spiral column 400 are connected by threads. However, since the bottom of the spiral column 400 is vertically restricted along the movable door panel 401 by the stabilizing slider 406, the spiral column 400 and the stabilizing slider 406 will move steadily upward under the action of the threaded structure. At the same time, the bottom pressing rod 407 can pull the drive plate 502 and the arc-shaped buckle 500 to flip. After flipping, the arc-shaped buckle... The buckle 500 will separate from the arc-shaped slot 504. After separation, it will be unrestricted and will drive the movable door panel 401 to rise synchronously when the expansion box 102 is raised. A protrusion is installed on the front of the upper end of the expansion box 102, and a groove is opened on the upper end of the movable door panel 401. After the protrusion is inserted into the groove, the movable door panel 401 will rise synchronously through the protrusion when the expansion box 102 rises. The adjustment plate 601 can provide an installation position for the inner structure. The adjustment knob 602 can drive the reverse screw 603 to rotate. The threaded structure can drive the sliding support plate 600 to unfold outward along the stabilizing insert plate 604 to adjust the distance at the end to adapt to the position of the combined pull-out bracket 108. The support spring 605 can push the auxiliary handle 606 and the positioning rod 607 to extend outward and embed into the inner side of the positioning hole 109 to achieve the locking effect.

[0034] The working principle and usage process of this invention: Grasp the handle structure at the front end of the flip-down pressure plate 309 according to the expansion requirements, then control the flip-down pressure plate 309 to flip along the fixed plate 301. After angle adjustment, the extended flip-down pressure plate 309 flips and rises along the fixed plate 301. The connecting frame 308 will lose the pressure of the flip-down pressure plate 309. Under the push of two sets of return springs 306, the rotating sleeve 303 and the flipping bracket 302 flip along the connecting area of ​​the fixed plate 301. After flipping, the flipping bracket 302 remains in a horizontal state, and the insertion rod 300 at the top of the rotating sleeve 303 will be vertically inserted into the double-layer winch 202. Inside the hole, the top movable ring 203 and top rod 206 are pushed up, and during the lifting process, the elastic block 107 is pushed into the bottom of the fixed box 100. Then, by flipping the lower pressure plate 309, the double-layer winch 202 is rotated and adjusted. A single adjustment of 90 degrees is performed. During the adjustment process, the double-layer winch 202 will pull the winch rope 204. Under the guidance of the auxiliary guide wheel 105, the movable plate 205 at the end can be pulled to slide down along the limit guide rail 104. During the sliding process, the movable plate 205 will pull the two sets of adjustment ropes 200 along the auxiliary guide wheel 105 to drive the sliding bracket 103 at the end to rise along the limit groove 101. During the rising process... The expansion box 102 will be steadily lifted along the fixed box 100 for expansion. During the lifting process, the box door is in a closed state. When the rotating connecting plate 404 approaches the box body, it will push the rotating plate 403 to flip along the rotating column 402. During the flipping, under the action of the thread of the spiral column 400, the spiral column 400 and the stabilizing slider 406 will move steadily upward. During the movement, the bottom pressing rod 407 will pull the bottom limiting frame 501 to rise. Under the control of the drive plate 502, the arc-shaped buckle 500 can be pulled to rotate along the rotating shaft area. The rotation will separate it from the arc-shaped slot 504. After separation, when adjusting the expansion box 102, it will... The movable door panel 401 is adjusted synchronously. After adjustment, the two sets of auxiliary handles 606 are gripped to compress the support spring 605 according to the module to be installed. After compression, the positioning rod 607 will retract and separate from the positioning hole 109. After separation, the height can be adjusted by moving the sliding support plate 600 and the adjusting plate 601 as a whole to change the range to adapt to the installation of different modules. When assembling the distribution box before use, the adjusting knob 602 is gripped to drive the reverse screw 603 to rotate. During the rotation, the sliding support plate 600 will be extended and retracted under the action of the thread. The adjustment can adapt to the position of the positioning hole 109 in the combined pull-out bracket 108.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An expandable prefabricated distribution box, comprising a fixed box (100), characterized in that: The inner wall and bottom of the fixed box (100) are provided with an extension component (001); the extension component (001) includes a double-layer winch (202), and two sets of winch ropes (204) are wound around the groove of the double-layer winch (202). A movable plate (205) is installed at the end of the winch rope (204) away from the double-layer winch (202), and an adjustment rope (200) is rotatably connected to the inner side of both ends of the movable plate (205). An extension box (102) is slidably provided on the outer side of the fixed box (100). Four sets of sliding brackets (103) are installed on the inner side of the lower end of the extension box (102). The sliding brackets (103) are fixedly connected to the end of the adjustment rope (200) away from the movable plate (205). Several sets of auxiliary guide wheels (105) are rotatably provided on the inner side of the bottom and upper end of the fixed box (100). The winch rope (204) and the adjustment rope (200) are movably provided on the outer side of the auxiliary guide wheels (105).

2. The expandable prefabricated distribution box according to claim 1, characterized in that: The top of the double-layer winch (202) is equipped with a combined bearing (201), and the combined bearing (201) is fixedly installed on the inner side of the lower end of the fixed box (100). The inner side of the double-layer winch (202) is provided with a movable ring (203) that slides up and down, and the top and bottom of the movable ring (203) are equipped with several sets of top rods (206).

3. The expandable prefabricated distribution box according to claim 2, characterized in that: The fixed box (100) has four sets of limiting grooves (101) on its side. The sliding bracket (103) is slidably disposed inside the limiting grooves (101). Two sets of limiting guide rails (104) are installed on both sides inside the fixed box (100). The movable plate (205) is slidably disposed outside the limiting guide rails (104). Several sets of compression springs (106) are embedded inside the lower end of the fixed box (100). An elastic block (107) is provided at the bottom of the compression spring (106). The elastic block (107) is movably inserted into the inner side of the double-layer winch (202). Two sets of combined pull-out brackets (108) are installed inside the fixed box (100) and the expansion box (102). Several sets of positioning holes (109) are opened on the side of the combined pull-out brackets (108).

4. The expandable prefabricated distribution box according to claim 1, characterized in that: The bottom of the double-layer winch (202) is equipped with a flexible adjustment component (002); the flexible adjustment component (002) includes a fixed plate (301), the fixed plate (301) is rotatably connected to the bottom of the double-layer winch (202) through a bearing, the fixed plate (301) is rotatably provided with a flip bracket (302) on both sides, the flip bracket (302) is rotatably provided with a rotating sleeve (303) in the middle, and a plug rod (300) is installed in the middle of the rotating sleeve (303). The plug rod (300) is movably inserted into the inner side of the double-layer winch (202). The two ends of the two sets of rotating sleeves (303) are connected with a connecting frame (308). The flip bracket (302) is provided with a sliding groove (304) on both sides, and the rotating sleeve (303) is slidably disposed in the inner side of the sliding groove (304).

5. The expandable prefabricated distribution box according to claim 4, characterized in that: The fixed plate (301) is rotatably provided with flip-down pressure plates (309) on both sides, and the flip-down pressure plates (309) are movably provided on the top of the connecting frame (308). The bottom of the fixed plate (301) is provided with a fixed bracket (305), and the top of both ends of the fixed bracket (305) is provided with a fixed rod (307). The fixed rod (307) is slidably provided on the inner side of the insertion rod (300). The rotating sleeve (303) and the fixed bracket (305) are elastically connected by a return spring (306).

6. The expandable prefabricated distribution box according to claim 1, characterized in that: A linkage adjustment assembly (003) is rotatably provided on the front side of one side of the fixed box (100); the linkage adjustment assembly (003) includes a movable door panel (401), four sets of rotating columns (402) are rotatably provided on the inner side of the upper end of the movable door panel (401), and a rotating plate (403) is installed on the top of the rotating column (402). A set of rotating connecting plates (404) is rotatably connected between the four sets of rotating plates (403). A torsion spring (405) is sleeved on the outer side of the rotating column (402). A spiral column (400) is rotatably provided on the inner side of the lower end of the rotating column (402). A stabilizing slider (406) is installed at the bottom of the spiral column (400), and the stabilizing slider (406) is slidably provided on the inner side of the upper end of the movable door panel (401). A pressing rod (407) is installed at the bottom of the stabilizing slider (406).

7. The expandable prefabricated distribution box according to claim 6, characterized in that: The linkage adjustment component (003) includes a fixed door panel (503), which is slidably sleeved on the outer side of the lower end of the movable door panel (401). An arc-shaped buckle (500) is rotatably provided on the inner side of the lower end of the fixed door panel (503), and a drive plate (502) is rotatably provided on the top of one side of the arc-shaped buckle (500). Limiting frames (501) are rotatably provided at both ends of the drive plate (502). The limiting frames (501) are fixedly installed at the bottom of the pressing rod (407) and the top of the arc-shaped buckle (500). Several sets of arc-shaped slots (504) are opened on one side inside the fixed door panel (503).

8. The expandable prefabricated distribution box according to claim 3, characterized in that: Several sets of adjustment plates (601) are slidably arranged between the two sets of combined pull-out brackets (108). An adjustment knob (602) is rotatably arranged on the inner side of the middle part of the adjustment plate (601), and a reverse screw (603) is arranged at both ends of the adjustment knob (602). A stabilizing insert plate (604) is installed on both sides of the adjustment plate (601). A sliding support plate (600) is rotatably arranged on the outer side of the end of the reverse screw (603). The stabilizing insert plate (604) is slidably inserted into the inner side of the sliding support plate (600).

9. The expandable prefabricated distribution box according to claim 8, characterized in that: An auxiliary handle (606) is slidably provided on the inner side of the sliding support plate (600) away from the adjusting plate (601). Two sets of positioning rods (607) are installed on the side of the auxiliary handle (606) away from the adjusting plate (601), and the positioning rods (607) are movably inserted into the inner side of the positioning hole (109). The side of the auxiliary handle (606) away from the positioning rods (607) is elastically connected to the sliding support plate (600) through a support spring (605).

10. A method of using an expandable prefabricated distribution box according to any one of claims 1-9, characterized in that: S1. Grasp the handle structure at the front end of the flip-down pressure plate (309) according to the expansion requirements, and then control the flip-down pressure plate (309) to flip along the fixed plate (301). After the angle adjustment is completed, the extended flip-down pressure plate (309) will flip and lift along the fixed plate (301). The connecting frame (308) will lose the pressure of the flip-down pressure plate (309). Under the push of the two sets of return springs (306), the rotating sleeve (303) and the flip bracket (302) will flip along the connection area of ​​the fixed plate (301). After flipping, the flip bracket (308) will be held in place. 02) When in a horizontal state, the insert rod (300) at the top of the rotating sleeve (303) will be vertically inserted into the hole of the double-layer winch (202), and push the top movable ring (203) and the top rod (206) to rise. During the lifting process, the elastic block (107) will be pushed into the bottom of the fixed box (100), and then the double-layer winch (202) will be rotated and adjusted by flipping the lower pressure plate (309); S2, adjust ninety degrees at a time. During the adjustment process, the double-layer winch (202) pulls the winch rope (204), and the auxiliary guide wheel (10) 5) Under the guidance of the guide, the movable plate (205) at the end can be pulled to slide down along the limit guide rail (104). During the sliding process, the movable plate (205) will pull the two sets of adjusting ropes (200) along the auxiliary guide wheel (105) to drive the sliding bracket (103) at the end to rise along the limit groove (101). During the rise, the expansion box (102) will be steadily lifted along the fixed box (100) for expansion; S3, during the lifting process, the box door is in a closed state. When the rotating connecting plate (404) approaches the box body, it will push the rotating plate (403) along the limit groove (101). The rotating column (402) flips over. When it flips over, the spiral column (400) is pushed by the thread of the spiral column (400) to move steadily upward in conjunction with the stabilizing slider (406). During the movement, the bottom squeezing rod (407) will pull the bottom limit frame (501) to rise. Under the control of the drive plate (502), the arc buckle (500) can be pulled to rotate along the rotating shaft area. The rotation will separate it from the arc slot (504). After separation, when the expansion box (102) is adjusted, the movable door panel (401) will be adjusted simultaneously. S4. After adjustment, grasp the two sets of auxiliary handles (606) to compress the support spring (605) according to the module to be installed. After compression, the positioning rod (607) will shrink and separate from the positioning hole (109). After separation, the height can be adjusted by moving the sliding support plate (600) and the adjustment plate (601) to change the range to adapt to the installation of different modules. S5. When assembling the distribution box before use, grasp the adjustment knob (602) to drive the reverse screw (603) to rotate. During the rotation, the sliding support plate (600) will be driven to extend and retract under the action of the thread. The adjustment can adapt to the position of the positioning hole (109) in the combined pull-out bracket (108).

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