A portable load-lifting device for small space operations

Abstract

The present invention relates to the technical field of lifting equipment, and specifically to a portable load-bearing lifting equipment for small space operations, comprising two bottom plates with open ends and parallel to each other, movable plates being slidably connected at both ends of the bottom plates, and a lifting mechanism for supporting the movable plates located above being fixedly connected between the top surfaces of the two movable plates located below. In the present invention, a hook engaged with a clamping block is fixedly connected to the top of the T-block, and when the cylindrical block is tightly attached to the inner top surface of the connecting tube 1, the hook at the top of the T-block and the clamping block inside the rectangular groove are squeezed, so that the clamping block and the hook are engaged, so that the sleeve rod 1 will not fall down when the threaded hole 2 is disengaged from the screw rod, and the sleeve rod 1 can still be moved upward when the screw rod rotates and disengages from the threaded hole on the top surface of the cylindrical block, so that the decoration workers can conveniently operate on the roof.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and in particular to a portable load-bearing lifting equipment for small space operations. Background Art

[0002] Lifting equipment, also known as a lifting platform, is a type of lifting equipment that lifts people or goods to a certain height. When performing vertical transportation in logistics systems such as factories and automatic warehouses, the lifting platform is often equipped with various flat conveying equipment as connecting devices for conveyor lines at different heights.

[0003] In the decoration industry, the existing lifting platforms are too large to be suitable for working in small indoor spaces. When decorating the roof, decorators usually stand on a stepladder. However, it is inconvenient for workers to move on the stepladder. When they need to move, they need to get off and move the stepladder, which is troublesome. Moreover, if two people are required to cooperate, it is inconvenient for two people to stand on the stepladder because the stepladder is too small, which results in a long decoration time and low work efficiency. Summary of the invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a portable load-bearing lifting equipment for small space operations, by fixing the top of the T-block with a hook engaged with the block, when the cylindrical block is tightly against the inner top surface of the connecting pipe, the hook at the top of the T-block and the block inside the rectangular groove are squeezed, so that the block and the hook are engaged, so that the sleeve rod 1 will not fall down when the threaded hole 2 is disengaged from the screw rod, and when the screw rod rotates and disengages from the threaded hole on the top surface of the cylindrical block, the sleeve rod 1 can still be moved upward, so that the renovation workers can conveniently operate on the roof.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A portable load-bearing lifting device for working in a small space comprises two bottom plates which are open at both ends and parallel to each other, movable plates being slidably connected at both ends inside the bottom plates, a lifting mechanism for supporting the movable plates located above being fixedly connected between the top surfaces of the two movable plates located below, a sliding mechanism being rotatably connected between the two bottom plates, and a movable mechanism being fixedly connected to the top surface of the bottom plate located below.

[0007] Further, the lifting mechanism includes a power assembly fixedly connected to the top surface of the bottom plate located below, wherein the top surfaces of the two moving plates located below are fixedly connected to a telescopic assembly transmission-connected to the power assembly, the telescopic assembly includes four arc plates fixedly connected to both ends of the two sides opposite to the top surfaces of the two moving plates, the top of the arc plate is fixedly connected to a sleeve one, a connecting pipe one is slidably connected inside the sleeve one, a clamping component is slidably connected inside the connecting pipe one, a sleeve rod one is fixedly connected to the top surface of the clamping component, which penetrates the inner top surface of the connecting pipe one and is fixedly connected to the bottom surfaces of the two moving plates located above, the top surface of the moving plate is located inside the arc plate and is rotatably connected to a screw rod penetrating the inner bottom surface of the sleeve one, cylindrical grooves are provided at four quadrants at the top of the outer wall of the screw rod, and a spring steel ball is fixedly connected inside the cylindrical groove, a thread is provided on the inner wall of the sleeve rod one which is screwed together with the screw rod, a threaded hole one is provided on the inner bottom surface of the connecting pipe one which is screwed together with the screw rod, and one end of the outer wall of the screw rod is located inside the arc plate and is fixedly connected to a pulley synchronous pulley.

[0008] Further, the clamping component includes a cylindrical block which slides inside a connecting tube and is fixedly connected to an outer bottom surface of a sleeve rod, the inner top surface of the connecting tube is provided with rectangular grooves at four quadrants, and a clamping block is fixedly connected between the two long side surfaces inside the rectangular groove, a T-slot is provided at a place on the top surface of the cylindrical block corresponding to the rectangular groove, the top surface of the cylindrical block is penetrated by two threaded holes which are screwed together with the screw rod, the inner wall of the two threaded holes is provided with an annular groove which is connected to the T-slot, a T-block is slidably connected inside the T-slot, a hook which is clamped to the clamping block is fixedly connected to the top of the T-block, a spring is fixedly connected between the two side surfaces opposite to the T-slot, a circular ring which is fixedly connected to the T-block is rotatably connected inside the annular groove, and a plurality of hemispherical grooves which are clamped to spring steel balls are provided on the inner wall of the circular ring at equal angles about its axis.

[0009] Further, the power assembly includes a double-axis motor fixedly connected to the top surface of the base plate, two output ends of the double-axis motor are fixedly connected to a bevel gear 1, the top surface of the base plate is located on both sides of the double-axis motor and is fixedly connected to a rotating shaft 1, the top of the outer wall of the rotating shaft 1 is fixedly connected to a bevel gear 2 that meshes with the bevel gear 1 for transmission, the bottom end of the outer wall of the rotating shaft 1 is fixedly connected to a single-groove pulley 1, both ends of the top surface of the base plate are provided with sliding grooves, a slider is slidably connected inside the sliding groove, a spring 1 is fixedly connected between the two side surfaces opposite to the sliding groove, the top surface of the slider is rotatably connected to a rotating shaft 2, the outer wall of the rotating shaft 2 is fixedly connected to a single-groove pulley 2, the two sides of the top surfaces of the two movable plates are fixedly connected to a rotating rod 1, the outer wall of the rotating rod 1 is fixedly connected to the double-groove pulley, one groove of the double-groove pulley is connected to a belt 1 between the single-groove pulley 2 and the single-groove pulley 1, and the other groove of the double-groove pulley is fixedly connected to a gear ring and is connected to the synchronous pulley through a toothed belt transmission.

[0010] Further, a rack is embedded and fixed on one side of the movable plate, and rectangular storage grooves connected to the inside of the bottom plate are provided at the two opposite sides of the two bottom plates corresponding to the racks, and a sliding mechanism is rotatably connected between the two rectangular storage grooves, and the sliding mechanism includes two sleeve rods, the outer wall of the two sleeve rods is sleeved with two connecting pipes, the inner wall of the two connecting pipes is provided with a rectangular slide groove, one end of the outer wall of the two sleeve rods is fixedly connected to a fixed block slidably connected to the rectangular slide groove, the outer wall of the two connecting pipes is sleeved with two sleeves, the inner wall of the two sleeves is provided with two rectangular slide grooves, and one end of the outer wall of the two connecting pipes is fixedly connected to a fixed block slidably connected to the two rectangular slide grooves 2. The two ends of the sleeve 2 and the sleeve rod 2 that are away from each other are fixedly connected with a connecting shaft 1 that is rotatably connected to the inner bottom surface of the corresponding rectangular storage groove, the outer wall of the connecting shaft 1 is fixedly connected with a gear 1, and the two ends of the inner bottom surface of the rectangular storage groove and the two sides of the gear 1 are rotatably connected with a connecting shaft 2, the outer walls of the two connecting shafts 2 are fixedly connected with a gear 2 that meshes with the gear 1 and the corresponding rack for transmission, the outer wall of the sleeve 2 is fixedly connected with a single-groove pulley 3, and a rotating rod 2 is penetrated and rotatably connected at the center of the top surface of the bottom plate above, and the outer wall of the rotating rod 2 is fixedly connected with a single-groove pulley 4 that is connected to the single-groove pulley 3 through a belt for transmission.

[0011] Furthermore, the moving mechanism includes a single-axis motor fixedly connected to the top surface of the base plate, the output end of the single-axis motor is fixedly connected to a single-groove pulley five, both side surfaces of the bottom surface of the base plate are fixedly connected to support blocks, a round rod is rotatably connected between the two support blocks, the outer wall of the round rod is fixedly connected to a single-groove pulley six which is connected to the single-groove pulley five through a belt three transmission, and both ends of the outer wall of the round rod are fixedly connected to drive wheels.

[0012] Furthermore, self-locking universal wheels are fixedly connected to both ends of the bottom surfaces of the two movable plates located at the bottom that are away from each other.

[0013] Furthermore, a rectangular hole for belt three-way transmission is penetrated through the top surface of the bottom plate located below, and rectangular notches are opened on the opposite sides of the two movable plates and corresponding to the rectangular holes, and the length of the two rectangular notches after closing is the same as the length of the rectangular hole.

[0014] Furthermore, two ends of the top surface of the bottom plate, which are located adjacent to the two slide grooves, are rotatably connected with fixed columns that are in contact with the outer side of the belt.

[0015] The invention further comprises: circular grooves are provided on the top surface of the bottom plate at two locations corresponding to the rotating rods, and the top ends of the outer walls of the two rotating rods are fixedly connected with rotating wheels located inside the circular grooves.

[0016] Furthermore, the bottom end of the outer wall of the screw rod is a bare rod structure, and the length of the screw rod is greater than the length of the sleeve rod.

[0017] Beneficial effects of the present invention:

[0018] 1. By fixing the top of the T-block with a hook that is engaged with the block, when the cylindrical block is tightly attached to the inner top surface of the connecting pipe 1, the hook at the top of the T-block and the block inside the rectangular groove are squeezed, so that the T-block can squeeze the spring 2 to move the T-block toward one end of the T-slot. At the same time, the cylindrical block pushes the connecting pipe 1 upward, so that the threaded hole 1 on the inner bottom surface of the connecting pipe 1 is screwed and connected with the screw rod. When the threaded hole 1 on the inner bottom surface of the connecting pipe 1 is screwed and connected with the screw rod, the screw rod is separated from the threaded hole 2 on the top surface of the cylindrical block. At the moment of separation, the hook at the top of the T-block is engaged with the block under the elastic action of the spring 2, so that the sleeve rod 1 will not fall down when the threaded hole 2 is separated from the screw rod, and when the screw rod rotates and is separated from the threaded hole on the top surface of the cylindrical block, the sleeve rod 1 can still be moved upward, so that the decoration workers can conveniently operate on the roof.

[0019] 2. By fixing the outer walls of the two connecting shafts with gears 2 that mesh with gears 1 and the corresponding racks, the two gears 2 can be rotated by rotating the gears 1, so that the two racks can be moved in opposite directions, and the two movable plates located in the same plane can be extended from the bottom plate to expand the area of ​​the bottom plate, so that multiple decoration workers can stand on the bottom plate and the top surfaces of the two movable plates at the same time, which is convenient for multiple decoration workers to cooperate with each other;

[0020] 3. By connecting the single-groove pulley five and the single-groove pulley six through the belt three transmission, when the single-axis motor is started, the two driving wheels can be rotated, which is convenient for the decoration workers to move the device to other places for work. The decoration workers do not need to climb down from the device and move the device to other places, which can improve work efficiency and reduce decoration time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the bottom plate and the movable plate in the present invention;

[0024] Figure 3 It is a schematic diagram of the lifting mechanism structure in the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the power assembly in the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the telescopic component in the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the clamping component in the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the sliding mechanism in the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the mobile mechanism in the present invention.

[0030] In the figure: 100, bottom plate; 110, moving plate; 120, slide groove; 130, rectangular hole; 140, rectangular storage groove; 150, rack; 160, support block; 170, self-locking universal wheel; 200, lifting mechanism; 210, power assembly; 211, double-axis motor; 212, bevel gear 1; 213, bevel gear 2; 214, single-groove pulley 1; 215, slider; 216, spring 1; 217, single-groove pulley 2; 218, double-groove pulley; 219, fixed column; 220, telescopic assembly; 221, sleeve 1; 222, connecting pipe 1; 223, sleeve rod 1; 224, screw rod; 225, synchronous Pulley; 226, arc plate; 227, clamping component; 2271, cylindrical block; 2272, T-slot; 2273, annular groove; 2274, circular ring; 2275, T-block; 2276, spring 2; 2277, hemispherical groove; 300, sliding mechanism; 310, sleeve rod 2; 320, connecting pipe 2; 330, sleeve 2; 340, gear 1; 350, gear 2; 360, single-groove pulley 3; 370, single-groove pulley 4; 380, rotating wheel; 400, moving mechanism; 410, single-axis motor; 420, single-groove pulley 5; 430, round rod; 440, single-groove pulley 6; 450, driving wheel. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-8As shown, a portable load-carrying lifting device for small space operation includes two bottom plates 100 with open ends and parallel to each other, and movable plates 110 are slidably connected at both ends of the bottom plates 100, wherein a lifting mechanism 200 for supporting the movable plate 110 located at the top is fixedly connected between the top surfaces of the two movable plates 110 located at the bottom, a sliding mechanism 300 is rotatably connected between the two bottom plates 100, and a moving mechanism 400 is fixedly connected to the top surface of the bottom plate 100 located at the bottom, and the two movable plates 110 located at the top and the bottom plate 100 located at the top are moved up and down by fixing the lifting mechanism 200 for supporting the movable plate 110 located at the top between the top surfaces of the two movable plates 110 located at the bottom. , it is convenient for the decoration workers to work on the roof. By rotating and connecting the sliding mechanism 300 between the two bottom plates 100, the four moving plates 110 can be controlled to extend from the corresponding bottom plates 100, so that multiple decoration workers can stand on the bottom plate 100 located above and the top surfaces of the two moving plates 110 at the same time, which is convenient for multiple decoration workers to cooperate in work. By fixing the top surface of the bottom plate 100 located below with the moving mechanism 400, the decoration workers can control the movement of the device to facilitate moving to other places for work. There is no need for the decoration workers to climb down from the device and move the device to other places, which can improve work efficiency and reduce decoration time. The lifting mechanism 200 includes a power component fixedly connected to the top surface of the bottom plate 100 located below 210, wherein the top surfaces of the two moving plates 110 located at the bottom are fixedly connected with a telescopic assembly 220 that is transmission-connected to the power assembly 210, and the telescopic assembly 220 includes four arc-shaped plates 226 that are fixedly connected at both ends of the two sides that are away from the top surfaces of the two moving plates 110, and the top of the arc-shaped plate 226 is fixedly connected to a sleeve 221, and a connecting pipe 222 is slidably connected inside the sleeve 221, and a clamping component 227 is slidably connected inside the connecting pipe 222, and a sleeve rod 223 that penetrates the inner top surface of the connecting pipe 222 and is fixedly connected to the bottom surfaces of the two moving plates 110 located at the top is fixedly connected to the top surface of the clamping component 227, and the top surface of the moving plate 110 is located inside the arc-shaped plate 226 and is rotatably connected to a sleeve rod 223 that penetrates the inner top surface of the sleeve 221. The screw rod 224 on the bottom surface has cylindrical grooves at the four quadrants of the top of the outer wall of the screw rod 224, and a spring steel ball is fixedly connected inside the cylindrical groove. The inner wall of the sleeve rod 223 has a thread screwed together with the screw rod 224. The inner bottom surface of the connecting pipe 222 is penetrated by a threaded hole 1 screwed together with the screw rod 224. One end of the outer wall of the screw rod 224 is located inside the arc plate 226 and is fixedly connected with a pulley synchronous pulley 225. By positioning the top surface of the movable plate 110 inside the arc plate 226 and rotating the screw rod 224 that penetrates the inner bottom surface of the sleeve 221, the connection pipe 222 and the sleeve rod 223 can be controlled to rise and / or fall, which is convenient for lifting the decoration workers and allowing operations on the roof.

[0033] The clamping component 227 includes a cylindrical block 2271 which slides inside the connecting tube 222 and is fixedly connected to the outer bottom surface of the sleeve rod 223. The inner top surface of the connecting tube 222 is provided with rectangular grooves at four quadrants, and a clamping block is fixedly connected between the two long side surfaces of the rectangular groove. A T-slot 2272 is provided at a place on the top surface of the cylindrical block 2271 corresponding to the rectangular groove. A threaded hole 2272 is provided through the top surface of the cylindrical block 2271 and is screwed together with the screw rod 224. An annular groove 2273 communicating with the T-slot 2272 is provided on the inner wall of the threaded hole 2273. A T-block 2275 is slidably connected to the T-slot 2272. A hook that is clamped to the clamping block is fixedly connected to the top of the T-block 2275. The two side surfaces of the T-block 2275 opposite to the T-slot 2272 A spring 2276 is fixedly connected therebetween, a circular ring 2274 fixedly connected to a T-block 2275 is rotatably connected inside the annular groove 2273, a plurality of hemispherical grooves 2277 engaged with spring steel balls are provided on the inner wall of the circular ring 2274 at equal angles to its axis, and a hook engaged with the block is fixedly connected to the top of the T-block 2275, when the cylindrical block 2271 is tightly attached to the inner top surface of the connecting pipe 1 222, the hook at the top of the T-block 2275 and the block inside the rectangular groove are squeezed, so that the T-block 2275 can squeeze the spring 2276 and move the T-block 2275 toward one end of the T-slot 2272, and at the same time, the cylindrical block 2271 pushes the connecting pipe 1 222 upwards, so that the threaded hole 1 on the inner bottom surface of the connecting pipe 1 222 is engaged with the threaded hole 1 on the inner bottom surface of the connecting pipe 1 222 The screw rod 224 is screwed together. When the threaded hole 1 on the inner bottom surface of the connecting tube 1 222 is screwed together with the screw rod 224, the screw rod 224 is disengaged from the threaded hole 2 on the top surface of the cylindrical block 2271. At the moment of disengagement, the hook at the top of the T-block 2275 is engaged with the block under the elastic action of the spring 2276. This prevents the sleeve rod 1 223 from falling down when the threaded hole 2 is disengaged from the screw rod 224. In addition, when the screw rod 224 is rotated and disengaged from the threaded hole on the top surface of the cylindrical block 2271, the sleeve rod 1 223 can still be moved upward, so that the renovation workers can conveniently operate on the roof. The power assembly 210 includes a dual-axis motor 211 fixedly connected to the top surface of the base plate 100. The two outputs of the dual-axis motor 211 are The ends are fixedly connected with bevel gear 1 212, the top surface of the bottom plate 100 is located on both sides of the double-axis motor 211 and is fixedly connected with shaft 1, the top of the outer wall of the shaft 1 is fixedly connected with bevel gear 213 meshing with bevel gear 1 212, the bottom of the outer wall of the shaft 1 is fixedly connected with a single-groove pulley 1 214, both ends of the top surface of the bottom plate 100 are provided with slide grooves 120, the inside of the slide groove 120 is slidably connected with a slider 215, a spring 1 216 is fixedly connected between the two side surfaces opposite to the slider 215 and the slide groove 120, the top surface of the slider 215 is rotatably connected with shaft 2, the outer wall of the shaft 2 is fixedly connected with a single-groove pulley 217, the two opposite sides of the top surfaces of the two moving plates 110 are fixedly connected with a rotating rod 1, and the outer wall of the rotating rod 1 is fixedly connected with a double-groove pulley 218.A belt 1 is connected between one groove of the double-groove pulley 218 and the single-groove pulley 217 and the single-groove pulley 1 214. A gear ring is fixedly connected inside the other groove of the double-groove pulley 218 and is connected to the synchronous pulley 225 through a toothed belt transmission. A slider 215 is slidably connected inside the slide groove 120, and a spring 1 216 is fixedly connected between the slider 215 and the two opposite sides of the slide groove 120. When the two moving plates 110 located in the same plane extend to both sides, the slider 215 can slide inside the slide groove 120, so that the belt 1 is always in a tensioned state, so that when the four moving plates 110 are extended, the lifting of each moving plate 110 and the bottom plate 100 located above can still be controlled.

[0034] A rack 150 is embedded and fixed on one side of the movable plate 110, and rectangular storage grooves 140 communicating with the inside of the bottom plate 100 are provided at the two opposite sides of the two bottom plates 100 corresponding to the racks 150, and a sliding mechanism 300 is rotatably connected between the two rectangular storage grooves 140, and the sliding mechanism 300 includes a sleeve rod 2 310, and a connecting pipe 2 320 is sleeved on the outer wall of the sleeve rod 2 310, and a rectangular slide groove 1 is provided on the inner wall of the connecting pipe 2 320, and a fixed block 1 is fixedly connected to the outer wall of the sleeve rod 2 310 and slidably connected to the rectangular slide groove, and a sleeve 2 330 is sleeved on the outer wall of the connecting pipe 2 320, and a rectangular slide groove 2 is provided on the inner wall of the sleeve 2 330, and a fixed block 1 is fixedly connected to the outer wall of the connecting pipe 2 320 and slidably connected to the rectangular slide groove 2 at one end. The fixed block 2, the two ends of the sleeve 2 330 and the sleeve rod 2 310 that are separated from each other are fixedly connected with a connecting shaft 1 that is rotatably connected to the corresponding inner bottom surface of the rectangular storage groove 140, the outer wall of the connecting shaft 1 is fixedly connected with a gear 1 340, and the two ends of the inner bottom surface of the rectangular storage groove 140 and located on both sides of the gear 1 340 are rotatably connected with the connecting shaft 2, the outer walls of the two connecting shafts 2 are fixedly connected with the gear 1 340 and the corresponding rack 150 for transmission. The outer wall of the sleeve 2 330 is fixedly connected with a single-groove pulley 3 360, and a rotating rod 2 is penetrated and rotatably connected at the center of the top surface of the bottom plate 100 above, and the outer wall of the rotating rod 2 is fixedly connected with a single-groove pulley 3 360 that is connected to the single-groove pulley 3 through a belt for transmission. Four 370, by fixing the outer walls of the two connecting shafts with gear two 350 that meshes with gear one 340 and with the corresponding rack 150, the two gear twos 350 can be rotated by rotating the gear one 340, so that the two racks 150 can be moved in opposite directions, and the two moving plates 110 located in the same plane can be extended from the bottom plate 100 to expand the area of ​​the bottom plate 100, so that multiple decoration workers can stand on the bottom plate 100 and the top surface of the two moving plates 110 at the same time, which is convenient for multiple decoration workers to cooperate in work. The moving mechanism 400 includes a single-axis motor 410 fixedly connected to the top surface of the bottom plate 100, and the output end of the single-axis motor 410 is fixedly connected to the output end of the single-axis motor 410. A single-groove pulley five 420 is connected, support blocks 160 are fixedly connected to both side surfaces of the bottom surface of the base plate 100, a round rod 430 is rotatably connected between the two support blocks 160, a single-groove pulley six 440 is fixedly connected to the outer wall of the round rod 430 and connected to the single-groove pulley five 420 through a belt three transmission, and driving wheels 450 are fixedly connected to both ends of the outer wall of the round rod 430. By connecting the single-groove pulley five 420 and the single-groove pulley six 440 through a belt three transmission, when the single-axis motor 410 is started, the two driving wheels 450 can be rotated, which is convenient for decoration workers to move the device to other places for operation. There is no need for decoration workers to climb down from the device and move the device to other places, which can improve work efficiency and reduce decoration time.

[0035] The two moving plates 110 at the bottom are located at the bottom. Both ends of the bottom surfaces facing each other are fixedly connected with self-locking universal wheels 170 on both sides, which is convenient for controlling the direction of the device. A rectangular hole 130 for belt three transmission is opened through the top surface of the bottom plate 100 at the bottom. Rectangular notches are opened on the opposite sides of the two moving plates 110 and corresponding to the rectangular holes 130. The length of the two rectangular notches after closing is the same as the length of the rectangular holes 130, which is convenient for belt three to drive the single-groove pulley six 440, so that the two driving wheels 450 can rotate. Both ends of the top surface of the bottom plate 100 are located adjacent to the two slide grooves 120 and are rotatably connected with fixed columns 219 that are abutted against the outer side of belt one. The double-groove pulley 218, the single-groove pulley two 217 and the single-groove pulley two 218 can be made to rotate through the fixed columns 219. The belt connected between the pulleys 214 is always in a tensioned state, and a circular groove is provided at the corresponding rotating rod 2 on the top surface of the base plate 100 above, and a rotating wheel 380 located inside the circular groove is fixedly connected to the top of the outer wall of the rotating rod 2, so that the decoration workers can control the four movable plates 110 to extend or retract from the base plate 100 when standing on the top surface of the base plate 100 above. The bottom end of the outer wall of the screw rod 224 is a bare rod structure, and the length of the screw rod 224 is greater than the length of the sleeve rod 223, so that the top surface of the cylindrical block 2271 contacts the inner top surface of the connecting tube 222 and can clamp the hook fixedly connected to the top of the T-block 2275 with the clamping block, and can push the connecting tube 222 upward, so that the threaded hole 1 on the inner bottom surface of the connecting tube 222 is screwed and connected with the screw rod 224.

[0036] Working principle: When in use, first place the device in the room that needs to be decorated, and the decorator stands on the bottom plate 100 located above, and then starts the double-axis motor 211, which can drive the bevel gear 1 212 to rotate, so that the bevel gear 2 213 can rotate, and the rotating bevel gear 213 can make the rotating shaft 1 rotate, so that the single-groove pulley 1 214 can rotate, because the single-groove pulley 1 214 is connected with the single-groove pulley 2 217 and the double-groove pulley 218 through the belt transmission, the rotation of the double-groove pulley 218 can be realized, and a toothed belt is connected between the double-groove pulley 218 and the synchronous pulley 225, so that the screw rod 224 can be rotated, and when the screw rod 224 rotates, the clamping component 227 can be raised, so that the sleeve rod 1 223 can be rotated. When the cylindrical block 2271 is tightly attached to the top surface of the connecting tube 1 222, the hook at the top of the T-block 2275 and the block inside the rectangular groove are squeezed, so that the T-block 2275 squeezes the spring 2276 to move the T-block 2275 toward one end of the T-slot 2272. At the same time, the cylindrical block 2271 pushes the connecting tube 1 222 upward, so that the threaded hole 1 on the inner bottom surface of the connecting tube 1 222 is screwed and connected with the screw rod 224. When the threaded hole 1 on the inner bottom surface of the connecting tube 1 222 is screwed and connected with the screw rod 224, the screw rod 224 is separated from the threaded hole 2 on the top surface of the cylindrical block 2271. At the moment of separation, the hook at the top of the T-block 2275 is engaged with the block under the elastic action of the spring 2276, so that the hook and the block are engaged. The sleeve rod 1 223 will not fall down when the threaded hole 2 is separated from the screw rod 224, so that the renovation workers can easily work on the roof. At the same time, the connecting pipe 2 320 and the sleeve 2 330 rise with the sleeve rod 1 223. When two people are required to work together, the renovation workers can rotate the single groove pulley 4 370 by rotating the rotating wheel 380. Since the single groove pulley 4 370 and the single groove pulley 3 360 are driven by the belt 2, the single groove pulley 3 360 can be rotated, so that the sleeve 2 330, the connecting pipe 2 320 and the sleeve rod 2 310 can be rotated. Since the two ends of the sleeve rod 2 310 and the sleeve 2 330 that are separated from each other are fixedly connected with the connecting shaft 1, the two gears 1 340 can be rotated. The gear 1 340 can make the corresponding two gears 2 350 rotate. Since the gear 2 350 is meshed with the corresponding rack 150 for transmission, the two movable plates 110 located in the same plane can slide out from the bottom plate 100, so that the bottom plate 100 can be lengthened, which is convenient for two or more decoration workers to stand on it at the same time to cooperate with each other, and the decoration efficiency can be improved. When it is necessary to move the position, the single-axis motor 410 can be started to rotate the single-groove pulley 5 420. Since the single-groove pulley 5 420 is connected to the single-groove pulley 6 440 through the belt 3 transmission, the round rod 430 can be rotated, so that the two driving wheels 450 can be rotated, so that the device can be moved, and there is no need for decoration workers to move the device to the construction position;

[0037] When the construction is completed, the dual-axis motor 211 is reversed, so that the connecting pipe 222 can be lowered first, until the spring steel ball at the top of the outer wall of the screw rod 224 is engaged with the hemispherical groove 2277, the ring 2274 can be rotated, so that the spring 2276 can be compressed. At the same time, the top of the screw rod 224 is screwed into the threaded hole 2 on the top surface of the cylindrical block 2271, so that the cylindrical block 2271 moves downward, and the hook at the top of the T-block 2275 can be disengaged from the block inside the rectangular groove on the top surface of the connecting pipe 222, so that the sleeve rod 223 moves downward under the action of the screw rod 224, until the bottom surface of the cylindrical block 2271 is in contact with the inner bottom surface of the connecting pipe 222, so that the bottom plate 100 located above is lowered to the lowest point, which is convenient for the decoration workers to get off from the bottom plate 100 located above, and then the reverse rotating wheel 380 will retract the two movable plates 110 located in the same plane into the interior of the bottom plate 100, which is convenient for the decoration workers to carry.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A portable load-lifting device for small space operation, characterized in that: The invention comprises two bottom plates (100) with open ends and parallel to each other, wherein both ends of the bottom plates (100) are slidably connected to movable plates (110), wherein a lifting mechanism (200) for supporting the movable plate (110) located at the top is fixedly connected between the top surfaces of the two movable plates (110) located at the bottom, a sliding mechanism (300) is rotatably connected between the two bottom plates (100), and a movable mechanism (400) is fixedly connected to the top surface of the bottom plate (100) located at the bottom; The lifting mechanism (200) comprises a power assembly (210) fixedly connected to the top surface of the bottom plate (100) located below, wherein the top surfaces of the two movable plates (110) located below are fixedly connected with a telescopic assembly (220) which is transmission-connected to the power assembly (210), and the telescopic assembly (220) comprises four arc-shaped plates (226) fixedly connected at both ends of two sides which are away from the top surfaces of the two movable plates (110), the top of the arc-shaped plate (226) is fixedly connected to a sleeve (221), the sleeve (221) is internally slidably connected with a connecting tube (222), the connecting tube (222) is internally slidably connected with a clamping component (227), and the top surface of the clamping component (227) is fixedly connected with a through-connecting A sleeve rod (223) is provided on the inner top surface of the tube (222) and is fixedly connected to the bottom surfaces of the two movable plates (110) located above; the top surface of the movable plate (110) is located inside the arc-shaped plate (226) and is rotatably connected to a screw rod (224) that passes through the inner bottom surface of the sleeve (221); cylindrical grooves are provided at four quadrants of the top of the outer wall of the screw rod (224); a spring steel ball is fixedly connected inside the cylindrical groove; a thread that is screwed and connected to the screw rod (224) is provided on the inner wall of the sleeve rod (223); a threaded hole that is screwed and connected to the screw rod (224) is provided through the inner bottom surface of the connecting tube (222); one end of the outer wall of the screw rod (224) is located inside the arc-shaped plate (226) and is fixedly connected to a pulley synchronous pulley (225); The clamping component (227) comprises a cylindrical block (2271) which slides inside the connecting tube (222) and is fixedly connected to the outer bottom surface of the sleeve rod (223); the inner top surface of the connecting tube (222) is provided with rectangular grooves at four quadrants, and a clamping block is fixedly connected between the two long side surfaces of the rectangular groove; a T-shaped groove (2272) is provided on the top surface of the cylindrical block (2271) corresponding to the rectangular groove; a threaded hole (2271) is provided through the top surface of the cylindrical block (2271) and is screwed to the screw rod (224); and a threaded hole (2272) is provided on the inner wall of the threaded hole (2271) The T-shaped groove (2273) is connected to the T-shaped groove (2272), a T-shaped block (2275) is slidably connected inside the T-shaped groove (2272), a hook that is engaged with the block is fixedly connected to the top of the T-shaped block (2275), a spring 2 (2276) is fixedly connected between the two sides of the T-shaped block (2275) opposite to the T-shaped groove (2272), a circular ring (2274) that is fixedly connected to the T-shaped block (2275) is rotatably connected inside the annular groove (2273), and a plurality of hemispherical grooves (2277) that are engaged with spring steel balls are opened on the inner wall of the circular ring (2274) at equal angles with respect to its axis; The moving mechanism (400) comprises a single-axis motor (410) fixedly connected to the top surface of the base plate (100); the output end of the single-axis motor (410) is fixedly connected to a single-groove pulley five (420); both side surfaces of the bottom surface of the base plate (100) are fixedly connected to support blocks (160); a round rod (430) is rotatably connected between the two support blocks (160); the outer wall of the round rod (430) is fixedly connected to a single-groove pulley six (440) connected to the single-groove pulley five (420) through a belt three transmission; and both ends of the outer wall of the round rod (430) are fixedly connected to drive wheels (450).

2. A portable load-lifting device for small space operation according to claim 1, characterized in that: The power assembly (210) comprises a double-axis motor (211) fixedly connected to the top surface of the base plate (100), the two output ends of the double-axis motor (211) are fixedly connected to bevel gear 1 (212), the top surface of the base plate (100) is located on both sides of the double-axis motor (211) and is fixedly connected to a rotating shaft 1, the top end of the outer wall of the rotating shaft 1 is fixedly connected to bevel gear 2 (213) meshing with bevel gear 1 (212) for transmission, the bottom end of the outer wall of the rotating shaft 1 is fixedly connected to a single-groove pulley 1 (214), both ends of the top surface of the base plate (100) are provided with a slide groove (120), the slide groove (120) is slidably connected to a slider (215), and the slider A spring (216) is fixedly connected between the two side surfaces opposite to the slide groove (120), the top surface of the slider (215) is rotatably connected to a rotating shaft (2), the outer wall of the rotating shaft (2) is fixedly connected to a single-groove pulley (217), the two sides of the top surfaces of the two movable plates (110) facing away from each other are fixedly connected to a rotating rod (1), the outer wall of the rotating rod (1) is fixedly connected to a double-groove pulley (218), one groove of the double-groove pulley (218) is connected to a belt (1) between the single-groove pulley (217) and the single-groove pulley (214), the other groove of the double-groove pulley (218) is fixedly connected to a gear ring and is connected to the synchronous pulley (225) through a toothed belt transmission.

3. The portable load-lifting device for small space operation according to claim 2 is characterized in that: A rack (150) is embedded and fixed on one side of the movable plate (110), and rectangular storage grooves (140) communicating with the interior of the bottom plate (100) are provided at two opposite side surfaces of the two bottom plates (100) corresponding to the racks (150). A sliding mechanism (300) is rotatably connected between the two rectangular storage grooves (140), and the sliding mechanism (300) comprises a sleeve rod (310), the outer wall of the sleeve rod (310) is sleeved with a connecting pipe (320), the inner wall of the connecting pipe (320) is provided with a rectangular sliding groove, one end of the outer wall of the sleeve rod (310) is fixedly connected with a fixed block (1) slidably connected to the rectangular sliding groove, the outer wall of the connecting pipe (320) is sleeved with a sleeve (330), the inner wall of the sleeve (330) is provided with a rectangular sliding groove, and one end of the outer wall of the connecting pipe (320) is fixedly connected with a fixed block (1) slidably connected to the rectangular sliding groove. The second sleeve (330) and the second sleeve rod (310) are fixedly connected at two ends facing away from each other with a connecting shaft (1) which is rotatably connected to the inner bottom surface of the corresponding rectangular storage groove (140); the outer wall of the connecting shaft (1) is fixedly connected with a gear (340); the two ends of the inner bottom surface of the rectangular storage groove (140) and located on both sides of the gear (340) are rotatably connected with the connecting shaft (2); the outer walls of the two connecting shafts (2) are fixedly connected with a gear (350) which is meshed with the gear (340) and the corresponding rack (150) for transmission; the outer wall of the second sleeve (330) is fixedly connected with a single-groove pulley (360); the center of the top surface of the bottom plate (100) located above is penetrated by a rotating rod (2) which is rotatably connected; the outer wall of the rotating rod (2) is fixedly connected with a single-groove pulley (370) which is connected to the single-groove pulley (360) through a belt for transmission.

4. The portable load-lifting device for small space operation according to claim 3 is characterized in that: Self-locking universal wheels (170) are fixedly connected to both ends of the bottom surfaces of the two movable plates (110) located at the bottom, which are opposite to each other.

5. The portable load-lifting device for small space operation according to claim 4 is characterized in that: A rectangular hole (130) for belt three-way transmission is provided through the top surface of the bottom plate (100) located below, and rectangular notches are provided on opposite sides of the two movable plates (110) corresponding to the rectangular holes (130), and the length of the two rectangular notches after closing is the same as the length of the rectangular hole (130).

6. The portable load-lifting device for small space operation according to claim 5 is characterized in that: Both ends of the top surface of the bottom plate (100) located adjacent to the two slide grooves (120) are rotatably connected with fixed columns (219) that are in contact with the outer side of the belt.

7. The portable load-lifting device for small space operation according to claim 6 is characterized in that: The top surface of the bottom plate (100) located above is provided with circular grooves at two locations corresponding to the rotating rods, and the top ends of the outer walls of the two rotating rods are fixedly connected to rotating wheels (380) located inside the circular grooves.

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