A construction lifting device

Abstract

The present invention relates to the technical field of lifting equipment, and specifically to a kind of construction lifting equipment, including a base, a lifting device hingedly installed at one end of the top of the base, a rotating gear column installed on the lifting device, a moving wheel assembly installed at the bottom of the base, a liftable brake component installed on the moving wheel assembly, and a driving component that cooperates with the lifting device and the brake component installed in the inner cavity of the base, and the driving component first drives the brake component to lock the moving wheel assembly and then drives the lifting device to flip to a position perpendicular to the base. When the lifting equipment is in use, the present invention can push the sliding seat to slide through an electric cylinder, so that the sliding seat can first drive the second rotating gear and the screw to rotate, thereby simultaneously pushing the brake components of the four moving wheels down through the abutment rod, thereby achieving stable braking of the moving wheels, and then as the sliding seat continues to slide, it drives the first rotating gear and the rotating gear column to rotate, thereby flipping the lifting device to a working position for work.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, in particular to a lifting equipment for building construction. Background Art

[0002] During construction, lifting equipment is needed to lift some raw materials. In order to facilitate movement and transportation, existing lifting equipment often installs universal wheels at the bottom and sets the lifting part to a foldable structure. The setting of the universal wheels can facilitate movement, and the setting of the folding structure can lower the center of gravity of the lifting equipment to ensure the stability of movement. However, although the existing universal wheels have brake structures, these brake structures require the staff to manually brake and fix them one by one when the equipment is used. This is not only time-consuming and laborious, but also when the operator forgets to brake, the lifting equipment will shift during use, causing danger. In addition, the existing folding of the lifting equipment also requires the operator to do it manually. To this end, the present invention has developed a construction lifting equipment to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a construction lifting device, which can automatically unfold and fold the lifting device and automatically brake and fix the moving wheels, so as to facilitate the transportation and movement of the lifting device.

[0004] To achieve the above purpose, the technical solution provided by the present invention is:

[0005] A construction lifting device comprises a base with a hollow interior, a lifting device is hingedly mounted on one end of the top of the base, a rotating gear column is mounted on the lifting device, moving wheel assemblies are mounted at four corners of the bottom of the base, a lifting brake is mounted on the moving wheel assembly, a driving assembly that cooperates with the lifting device and the brake is mounted in the inner cavity of the base, and the driving assembly first drives the brake to lock the moving wheel assembly and then drives the lifting device to flip to a position perpendicular to the base;

[0006] The driving assembly includes an electric cylinder installed at the bottom of the inner cavity of the base and a screw rod rotatably connected to the bottom of the inner cavity of the base, the electric cylinder is arranged at one end away from the lifting device, the screw rod is located in the middle position of the base, the outer wall of the screw rod is threadedly connected with a slider, the outer wall of the slider is fixedly connected with an abutment rod, and the end of the abutment rod is connected to the brake parts on the four sets of moving wheel assemblies, the output end of the electric cylinder is fixedly connected to a sliding seat, the top of the sliding seat is fixedly provided with a first rack, the top of the inner cavity of the base is rotatably connected with a first rotating gear that cooperates with the first rack, and the top of the first rotating gear passes through the base and is meshed with the rotating gear column, the side wall of the sliding seat is installed with a second rack, and the outer wall of the screw rod is fixedly provided with a second rotating gear that meshes with the second rack.

[0007] Preferably, the lifting device includes fixed blocks symmetrically installed on opposite sides of the top of the base, a hinge block is rotatably connected between the two fixed blocks, a rotating shaft is rotatably connected between the two hinge blocks, a rotating gear column meshing with the first rotating gear is fixedly connected to the outer wall of the rotating shaft, a square frame is fixedly connected to the top between the two hinge blocks, a chain lifting member is installed between the opposite side walls of the square frame, and a bucket assembly is installed on one side of the lifting chain of the chain lifting member.

[0008] Preferably, the hopper assembly includes a mounting bar installed on the outer wall of the lifting chain of the chain lifting member, the hopper is detachably mounted on one side of the mounting bar, sliding bars are symmetrically fixed at opposite ends of the mounting bar, and limiting grooves that cooperate with the sliding bars are opened on both side walls of the square frame.

[0009] Preferably, limit holes are symmetrically provided on the outer walls at two opposite ends of the rotating shaft, and a limit column that cooperates with the limit hole is slidably connected to the top of the base, one end of the limit column passes through the top of the base and is installed with a first limit block, and a first inclined surface is provided at the bottom of the first limit block, and a spring is sleeved on the outer wall of the limit column, and the spring is located between the top of the inner cavity of the base and the first limit block, an abutment block that cooperates with the first limit block is installed on the top of the sliding seat, and a second inclined surface is provided on the top of the abutment block, and after the first rack is meshed with the first rotating gear, the abutment block abuts against the first limit block.

[0010] Preferably, the moving wheel assembly includes a mounting block, a rotating tube is rotatably connected to the bottom of the mounting block, a concave mounting seat is fixedly connected to the bottom of the rotating tube, a moving wheel is rotatably connected between the inner walls of the concave mounting seat, limiting gears are symmetrically fixedly connected to the opposite outer walls of the moving wheel, an arc-shaped chuck is slidably connected between the opposite side walls of the concave mounting seat, limiting teeth that cooperate with the limiting gears are arranged on the tops of the opposite sides of the inner cavity of the arc-shaped chuck, a mounting rod is fixedly connected to the top of the arc-shaped chuck, one end of the mounting rod passes through the inner cavity of the rotating tube and is rotatably connected to the abutment rod.

[0011] Preferably, the arc-shaped chuck has second limit blocks symmetrically fixedly connected to two opposite side walls, and the concave mounting seat has two opposite side walls penetrated by sliding grooves cooperating with the second limit blocks.

[0012] Preferably, two screw rods are provided, and the two screw rods are respectively located at opposite sides of the base, the outer walls of the two screw rods are threadedly connected with sliders, the outer walls of the two sliders are installed with abutment rods, and each abutment rod is rotatably connected to the two installation rods on the same side;

[0013] The screw is a double-headed screw, the slider is arranged at the lower end of the screw, the second rotating gear is arranged in the middle position of the screw, the outer wall of the upper end of the screw is threadedly connected with a threaded sleeve, and the threaded sleeve is slidably connected to the top of the base, the top of the threaded sleeve passes through the top of the base and is rotatably connected to a mounting sleeve, the top of the mounting sleeve is fixedly connected with a pressure block, and the pressure block is used to press the two sides of the square frame when the square frame is parallel to the base, the top of the base is fixedly connected with a fixed sleeve, and the fixed sleeve is sleeved on the outside of the mounting sleeve, the inner wall of the fixed sleeve is provided with a spiral groove, and both ends of the spiral groove are provided with straight grooves connected to the spiral groove, the outer wall of the mounting sleeve is fixedly connected with an abutment column that cooperates with the spiral groove, and the abutment column and the spiral groove cooperate with each other to drive the pressure block to rotate 90 degrees.

[0014] Preferably, a limit strip is disposed on the outer wall of the threaded sleeve, and a through hole cooperating with the limit strip is opened on the top of the base.

[0015] Preferably, the square frame is hinged with first hinged rods on two opposite sides, the free end of the first hinged rod is hinged with a second hinged rod, and a hinged seat hinged with the second hinged rod is installed on the top of the base.

[0016] Preferably, a slide rail cooperating with the slide seat is installed at the bottom of the inner cavity of the base.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When the lifting device of the present invention is in use, the sliding seat can be pushed to slide by the electric cylinder, so that the sliding seat can first drive the second rotating gear and the screw to rotate, thereby simultaneously pushing the brake parts of the four moving wheels down through the abutment rod, thereby achieving stable braking of the moving wheels, and then as the sliding seat continues to slide, it drives the first rotating gear and the rotating gear column to rotate, thereby flipping the lifting device to the working position for work. That is, the present invention can automatically realize the braking and fixing of the base and then flipping the lifting device to the working position by setting a group of electric cylinders, thereby ensuring stability during flipping and working, and achieving that work can only be performed after the moving wheels are locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the lifting device of the present invention;

[0021] Figure 2It is a schematic diagram of the front cross-section structure of the lifting device of the present invention;

[0022] Figure 3 It is a schematic diagram of a partial side section structure of the lifting device of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a lifting device in the lifting device of the present invention;

[0024] Figure 5 It is a schematic diagram of the front cross-section structure of the lifting device in the lifting equipment of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a sliding seat and its connecting parts in the lifting device of the present invention;

[0026] Figure 7 It is a structural schematic diagram of a fixed sleeve and its connecting parts in the lifting device of the present invention;

[0027] Figure 8 It is a structural schematic diagram of a moving wheel assembly in the lifting device of the present invention;

[0028] Fig. 9 It is a schematic diagram of the front cross-section structure of the moving wheel assembly in the lifting device of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Base; 11. Limiting column; 12. First limiting block; 13. Spring; 14. Fixed sleeve; 15. Spiral groove; 16. Straight groove; 17. Articulated seat; 18. Slide rail; 2. Lifting device; 21. Rotating gear column; 22. Fixed block; 23. Articulated block; 24. Rotating shaft; 25. Square frame; 251. Limiting groove; 26. Chain lifting member; 27. Hopper assembly; 271. Mounting bar; 272. Hopper; 273. Slide bar; 28. Limiting hole; 29. ​​First hinge rod; 210. Second hinge rod; 3. Moving wheel assembly; 31. Mounting block; 32. Rotating tube; 33. Concave mounting seat; 34. Moving wheel; 35. Limiting gear; 36. Arc chuck; 37. Limiting tooth; 38. Mounting rod; 39. Second limiting block; 310. Slide; 4. Driving assembly; 41. Electric cylinder; 42. Screw rod; 43. Sliding block; 44. Abutting rod; 45. Sliding seat; 46. First rack; 47. First rotating gear; 48. Second rack; 49. Second rotating gear; 410. Abutting block; 411. Threaded sleeve; 412. Mounting sleeve; 413. Pressing block; 414. Abutting column; 415. Limiting strip. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in 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] like Figure 1-9 As shown: One embodiment of the present invention is:

[0033] A construction lifting device comprises a base 1 with a hollow interior, a lifting device 2 is hingedly mounted at one end of the top of the base 1, a rotating gear column 21 is mounted on the lifting device 2, moving wheel assemblies 3 are mounted at four corners of the bottom of the base 1, and a lifting brake component is mounted on the moving wheel assembly 3, a driving assembly 4 that cooperates with the lifting device 2 and the brake component is mounted in the inner cavity of the base 1, and the driving assembly 4 first drives the brake component to lock the moving wheel assembly 3 and then drives the lifting device 2 to flip to a position perpendicular to the base 1;

[0034] The driving assembly 4 includes an electric cylinder 41 installed at the bottom of the inner cavity of the base 1 and a screw 42 rotatably connected to the bottom of the inner cavity of the base 1. The electric cylinder 41 is arranged at one end away from the lifting device 2, and the screw 42 is located in the middle position of the base 1. The outer wall of the screw 42 is threadedly connected with a slider 43, and the outer wall of the slider 43 is fixedly connected with an abutment rod 44, and the end of the abutment rod 44 is connected to the brake parts on the four sets of moving wheel assemblies 3. The output end of the electric cylinder 41 is fixedly connected to a sliding seat 45, and a first rack 46 is installed on the top of the sliding seat 45. A first rotating gear 47 that cooperates with the first rack 46 is rotatably connected to the top of the inner cavity of the base 1, and the top of the first rotating gear 47 passes through the base 1 and is meshed with the rotating gear column 21. A second rack 48 is installed on the side wall of the sliding seat 45, and a second rotating gear 49 that meshes with the second rack 48 is fixedly connected to the outer wall of the screw 42.

[0035] In this embodiment, the lifting device 2 includes fixed blocks 22 symmetrically installed on opposite sides of the top of the base 1, a hinge block 23 is rotatably connected between the two fixed blocks 22, a rotating shaft 24 is rotatably connected between the two hinge blocks 23, a rotating gear column 21 meshing with the first rotating gear 47 is fixedly connected to the outer wall of the rotating shaft 24, a square frame 25 is fixedly connected to the top between the two hinge blocks 23, a chain lifting member 26 is installed between the opposite side walls of the square frame 25, a hopper assembly 27 is installed on one side of the lifting chain of the chain lifting member 26, and the hopper assembly 27 is installed on the outer side of the hopper assembly 27. Component 27 includes a mounting bar 271 installed on the outer wall of the lifting chain of the chain lifting component 26, a hopper 272 is detachably installed on one side of the mounting bar 271, and slide bars 273 are symmetrically fixed at opposite ends of the mounting bar 271. The two side walls of the square frame 25 are provided with limiting grooves 251 that cooperate with the slide bars 273. The lifting chain in the chain lifting component can drive the mounting bar and the bucket to move up and down to realize the lifting of materials, and the mutual cooperation between the slide bar and the limiting groove can play an auxiliary supporting role for the bucket, thereby avoiding deformation of the chain due to the weight of the bucket.

[0036] In this embodiment, in order to ensure the stability of the lifting device when in use and to avoid wear between the gear and the rack, the outer walls of the two opposite ends of the rotating shaft 24 are symmetrically provided with limit holes 28, and the top of the base 1 is slidably connected with a limit column 11 that cooperates with the limit hole 28. One end of the limit column 11 passes through the top of the base 1 and is installed with a first limit block 12. The bottom of the first limit block 12 is provided with a first inclined surface. The outer wall of the limit column 11 is sleeved with a spring 13, and the spring 13 is located between the top of the inner cavity of the base 1 and the first limit block 12. The top of the sliding seat 45 is provided with an abutment block 410 that cooperates with the first limit block 12, and the top of the abutment block 410 A second inclined surface is provided, and after the first rack 46 is meshed with the first rotating gear 47, the abutment block 410 abuts against the first limit block 12, wherein when the sliding seat drives the first rack to slide, it drives the first rotating gear to rotate, thereby driving the rotating gear column and the square frame to flip over, and after the first rack is flipped into place and separated from the first rotating gear, the abutment block contacts the first limit block and lifts up the first limit block and the limit column, and then inserts it into the limit hole, thereby realizing the fixing of the square frame by the mutual cooperation of the limit column and the limit hole, which not only ensures the stability of the use of the lifting device but also avoids the problem of wear between the gear and the rack due to force.

[0037] In this embodiment, the number of the limiting holes and limiting columns can also be set to 4 groups or 6 groups, and the abutment blocks and the first limiting blocks are also set accordingly, which can further improve the stability of the square frame.

[0038] In this embodiment, a group of stoppers are arranged on one side of the fixed block, so that the square frame can be limited after being flipped to a vertical position, and the rotating shaft is hinged with a damping mechanism to the fixed block.

[0039] The movable wheel assembly 3 comprises a mounting block 31, the bottom of which is rotatably connected to a rotating tube 32, the bottom of which is fixedly connected to a concave mounting seat 33, a movable wheel 34 is rotatably connected to the inner walls of the concave mounting seat 33, the outer walls on opposite sides of the movable wheel 34 are symmetrically fixedly connected to limit gears 35, an arc-shaped chuck 36 is slidably connected to the opposite side walls of the concave mounting seat 33, the tops on opposite sides of the inner cavity of the arc-shaped chuck 36 are provided with limit teeth 37 that cooperate with the limit gear 35, a mounting rod 38 is fixedly connected to the top of the arc-shaped chuck 36, one end of the mounting rod 38 passes through the inner cavity of the rotating tube 32 and is rotatably connected to the abutment rod 44, wherein the setting of the rotating tube enables the movable wheel to rotate 360 ​​degrees, and when braking, the abutment rod pushes the mounting rod and the arc-shaped chuck to descend, so that the limit teeth clamp and fix the limit gear, thereby realizing the locking and fixation of the movable wheel, and the rotational connection between the rotating rod and the abutment rod can adapt to the 360-degree rotation of the movable wheel.

[0040] In this embodiment, in order to further enable the arc chuck and the moving wheel to rotate synchronously, the arc chuck 36 has second limit blocks 39 symmetrically fixed to the two opposite side walls, and the concave mounting seat 33 has sliding grooves 310 that cooperate with the second limit blocks 39. The cooperation between the sliding grooves and the second limit blocks can not only realize the lifting and lowering of the arc chuck, but also enable the arc chuck and the concave mounting seat to rotate synchronously.

[0041] In this embodiment, in order to keep the square frame fixed when it is laid flat, two screw rods 42 are provided, and the two screw rods 42 are respectively located on opposite sides of the base 1, and the outer walls of the two screw rods 42 are threadedly connected with sliders 43, and the outer walls of the two sliders 43 are installed with abutment rods 44, and each abutment rod 44 is rotatably connected to the two mounting rods 38 on the same side;

[0042] The screw 42 is a double-ended screw, the slider 43 is arranged at the lower end of the screw 42, the second rotating gear 49 is arranged in the middle position of the screw 42, the outer wall of the upper end of the screw 42 is threadedly connected with a threaded sleeve 411, and the threaded sleeve 411 is slidably connected to the top of the base 1, the top of the threaded sleeve 411 passes through the top of the base 1 and is rotatably connected with a mounting sleeve 412, the top of the mounting sleeve 412 is fixedly connected with a pressing block 413, and the pressing block 413 is used to press the two sides of the square frame 25 when the square frame 25 is parallel to the base 1, the top of the base 1 is fixedly connected with a fixing sleeve 14, and the fixing sleeve 14 is sleeved on the outside of the mounting sleeve 412, and the inner wall of the fixing sleeve 14 is provided with a spiral Groove 15, both ends of the spiral groove 15 are provided with straight grooves 16 connected to the spiral groove 15, the outer wall of the mounting sleeve 412 is fixedly connected with an abutment column 414 which cooperates with the spiral groove 15, and the abutment column 414 cooperates with the spiral groove 15 to drive the pressure block 413 to rotate 90 degrees, wherein the sliding seat first drives the square frame to flip to a horizontal position, and then drives the screw to rotate in the opposite direction, so that the moving wheel can be opened while also driving the threaded sleeve and the mounting sleeve to descend, and the mounting sleeve rotates under the cooperation of the abutment column and the spiral groove, so that the pressure block rotates 90 degrees and then continues to descend and presses and fixes the square frame, so that the square frame is stable when it is placed flat.

[0043] In this embodiment, a limit strip 415 is provided on the outer wall of the threaded sleeve 411, and a through hole cooperating with the limit strip 415 is provided on the top of the base 1. The threaded sleeve can only slide up and down in a straight line through the cooperation between the limit strip and the through hole.

[0044] In this embodiment, the square frame 25 is hinged with a first hinge rod 29 on two opposite sides, and the free end of the first hinge rod 29 is hinged with a second hinge rod 210. A hinge seat 17 hinged to the second hinge rod 210 is installed on the top of the base 1. After the square frame is flipped 90 degrees, the first hinge rod and the second hinge rod can form 180 degrees, thereby playing a supporting role for the square frame.

[0045] In this embodiment, a slide rail 18 cooperating with the sliding seat 45 is installed at the bottom of the inner cavity of the base 1, which can play an auxiliary supporting role for the sliding seat so that the sliding seat will not be in a suspended state.

[0046] In this embodiment, an operating rod that cooperates with the second rotating gear 49 is installed on the side wall of the base 1, so that the screw rod 42 can be manually operated to achieve independent locking and release of the moving wheel.

[0047] The specific working process of this embodiment is as follows:

[0048] When the lifting device is to be used, the staff starts the electric cylinder 41 through the external switch, and the electric cylinder 41 extends to push the sliding seat 45 to slide along the slide rail 18, and the second racks 48 on both sides of the sliding seat 45 first mesh with the second rotating gears 49 on both sides, thereby driving the second rotating gear 49 and the screw 42 to rotate, wherein the rotation of the screw 42 drives the slider 43 and the abutment rod 44 to descend, thereby pushing the installation rod 38 and the arc chuck 36 to descend, so that the limiting tooth 37 in the arc chuck 36 is clamped with the limiting gear 35, thereby locking and fixing the moving wheel 34 to prevent the moving wheel 34 from rolling, and at the same time, the rotation of the screw 42 can synchronously drive the threaded sleeve 411, the installation sleeve 412 and the pressure block 413 to rise, and the installation sleeve 412 and the pressure block 413 rotate 90 degrees under the mutual cooperation of the abutment column 414 and the spiral groove 15, so that the pressure block 413 is free from interference with the square frame 25;

[0049] Then the sliding seat 45 continues to slide, and drives the first rotating gear 47 to rotate through the first rack 46, thereby driving the rotating gear column 21, the rotating shaft 24 and the square frame 25 to rotate, so that the square frame 25 is flipped to a vertical position, and then the first rack 46 disengages from the first rotating gear 47 (at this time the square frame 25 is flipped into place, and the limiting hole 28 is in a downward position), and the first limiting block 12 contacts the abutment block 414, thereby pushing the first limiting block 12 and the limiting column 11 to rise and insert into the limiting hole 28, thereby ensuring the stability of the square frame 25.

[0050] After the square frame 25 is flipped into place, the hopper 272 is mounted on the mounting bar 271 (it can be mounted by bolts and the corresponding bearing members can be installed according to the type of material to be lifted), and then the material is lifted and transported by the chain lifting member 26.

[0051] After the equipment is used, the hinge position between the first hinge rod 29 and the second hinge rod 210 is swung at an angle, and then the electric cylinder 41 is retracted to disengage the abutment block 410 from the first limit block 12, and the abutment column 414 returns to its original position under the action of the restoring force of the spring 13 and its own gravity, thereby disengaging from the limit hole 28, and then the first rack 46 drives the square frame 25 to gradually flip to a horizontal position, and then drives the second rotating gear 49 and the screw 42 to reverse through the second rack 48, thereby driving the arc chuck 36 to rise while driving the mounting sleeve 412 and the pressure block 413 to descend, and the pressure block 413 rotates 90 degrees with the cooperation of the abutment column 414 and the spiral groove 15, and contacts and presses the square frame 25.

[0052] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may 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. A construction lifting device, characterized in that: The invention comprises a base (1) with a hollow interior, a lifting device (2) being hingedly mounted on one end of the top of the base (1), a rotating gear column (21) being mounted on the lifting device (2), moving wheel assemblies (3) being mounted on the four corners of the bottom of the base (1), a liftable brake component being mounted on the moving wheel assembly (3), a driving assembly (4) cooperating with the lifting device (2) and the brake component being mounted in the inner cavity of the base (1), and the driving assembly (4) first driving the brake component to lock the moving wheel assembly (3) and then driving the lifting device (2) to flip to a position perpendicular to the base (1); The driving assembly (4) comprises an electric cylinder (41) mounted at the bottom of the inner cavity of the base (1) and a screw (42) rotatably connected to the bottom of the inner cavity of the base (1); the electric cylinder (41) is arranged at one end away from the lifting device (2); the screw (42) is located in the middle of the base (1); a slider (43) is threadedly connected to the outer wall of the screw (42); an abutment rod (44) is fixedly connected to the outer wall of the slider (43); and the end of the abutment rod (44) is connected to the brake parts on the four sets of moving wheel assemblies (3); the electric cylinder (41) is arranged at the end away from the lifting device (2); the screw (42) is located in the middle of the base (1); a slider (43) is threadedly connected to the outer wall of the slider (43); an abutment rod (44) is fixedly connected to the outer wall of the slider (43); and the end of the abutment rod (44) is connected to the brake parts on the four sets of moving wheel assemblies (3); The output end of the cylinder (41) is fixedly connected to a sliding seat (45), a first rack (46) is installed on the top of the sliding seat (45), a first rotating gear (47) that cooperates with the first rack (46) is rotatably connected to the top of the inner cavity of the base (1), and the top of the first rotating gear (47) passes through the base (1) and is meshed with the rotating gear column (21), a second rack (48) is installed on the side wall of the sliding seat (45), and a second rotating gear (49) that meshes with the second rack (48) is fixedly connected to the outer wall of the screw rod (42).

2. A construction lifting device according to claim 1, characterized in that: The lifting device (2) comprises fixed blocks (22) symmetrically mounted on opposite sides of the top of the base (1); a hinge block (23) is rotatably connected between the two fixed blocks (22); a rotating shaft (24) is rotatably connected between the two hinge blocks (23); a rotating gear column (21) meshingly connected to a first rotating gear (47) is fixedly connected to the outer wall of the rotating shaft (24); a square frame (25) is fixedly connected to the top between the two hinge blocks (23); a chain lifting member (26) is mounted between opposite side walls of the square frame (25); and a hopper assembly (27) is mounted on one side of the lifting chain of the chain lifting member (26).

3. A construction lifting device according to claim 2, characterized in that: The hopper assembly (27) comprises a mounting bar (271) mounted on the outer wall of the lifting chain of the chain lifting member (26); a hopper (272) is detachably mounted on one side of the mounting bar (271); sliding bars (273) are symmetrically fixedly connected to opposite ends of the mounting bar (271); and limiting grooves (251) cooperating with the sliding bars (273) are formed on both side walls of the square frame (25).

4. A construction lifting device according to claim 2, characterized in that: The outer walls of the rotating shaft (24) at opposite ends are symmetrically provided with limit holes (28); a limit column (11) cooperating with the limit hole (28) is slidably connected to the top of the base (1); one end of the limit column (11) passes through the top of the base (1) and is provided with a first limit block (12); a first inclined surface is provided at the bottom of the first limit block (12); a spring (13) is sleeved on the outer wall of the limit column (11); and the spring (13) is located between the top of the inner cavity of the base (1) and the first limit block (12); an abutment block (410) cooperating with the first limit block (12) is provided at the top of the sliding seat (45); and a second inclined surface is provided at the top of the abutment block (410); after the first rack (46) is meshed with the first rotating gear (47), the abutment block (410) abuts against the first limit block (12).

5. A construction lifting device according to claim 1, characterized in that: The moving wheel assembly (3) comprises a mounting block (31), the bottom of the mounting block (31) is rotatably connected to a rotating tube (32), the bottom of the rotating tube (32) is fixedly connected to a concave mounting seat (33), a moving wheel (34) is rotatably connected between the inner walls of the concave mounting seat (33), the outer walls on opposite sides of the moving wheel (34) are symmetrically fixedly connected to limit gears (35), an arc-shaped chuck (36) is slidably connected between the opposite side walls of the concave mounting seat (33), the tops on opposite sides of the inner cavity of the arc-shaped chuck (36) are provided with limit teeth (37) that cooperate with the limit gears (35), and a mounting rod (38) is fixedly connected to the top of the arc-shaped chuck (36), one end of which passes through the inner cavity of the rotating tube (32) and is rotatably connected to the abutment rod (44).

6. A construction lifting device according to claim 5, characterized in that: The arc-shaped chuck (36) is symmetrically fixedly connected to the two opposite side walls with second limit blocks (39), and the concave mounting seat (33) is penetrated by the two opposite side walls with sliding grooves (310) that cooperate with the second limit blocks (39).

7. A construction lifting device according to claim 5, characterized in that: Two screw rods (42) are provided, and the two screw rods (42) are respectively located on opposite sides of the base (1); the outer walls of the two screw rods (42) are threadedly connected to sliders (43); the outer walls of the two sliders (43) are both installed with abutment rods (44), and each abutment rod (44) is rotatably connected to two mounting rods (38) on the same side; The screw (42) is a double-ended screw, the slider (43) is arranged at the lower end of the screw (42), the second rotating gear (49) is arranged in the middle of the screw (42), the outer wall of the upper end of the screw (42) is threadedly connected with a threaded sleeve (411), and the threaded sleeve (411) is slidably connected to the top of the base (1), the top of the threaded sleeve (411) passes through the top of the base (1) and is rotatably connected to a mounting sleeve (412), the top of the mounting sleeve (412) is fixedly connected with a pressing block (413), and the pressing block (413) is used to connect the square frame (25) and the base (1 ) are parallel to each other, pressing the two sides of the square frame (25); a fixing sleeve (14) is fixedly connected to the top of the base (1), and the fixing sleeve (14) is sleeved on the outside of the mounting sleeve (412); a spiral groove (15) is provided on the inner wall of the fixing sleeve (14); both ends of the spiral groove (15) are provided with straight grooves (16) connected to the spiral groove (15); an abutment column (414) that cooperates with the spiral groove (15) is fixedly connected to the outer wall of the mounting sleeve (412), and the abutment column (414) and the spiral groove (15) cooperate with each other to drive the pressing block (413) to rotate 90 degrees.

8. A construction lifting device according to claim 7, characterized in that: The outer wall of the threaded sleeve (411) is provided with a limit strip (415), and the top of the base (1) is provided with a through hole that cooperates with the limit strip (415).

9. A construction lifting device according to claim 8, characterized in that: The square frame (25) is hinged with first hinged rods (29) on opposite sides, the free end of the first hinged rod (29) is hinged with a second hinged rod (210), and a hinged seat (17) hinged to the second hinged rod (210) is installed on the top of the base (1).

10. A construction lifting device according to claim 1, characterized in that: A slide rail (18) that cooperates with the slide seat (45) is installed at the bottom of the inner cavity of the base (1).

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