Multifunctional lifting device for fabricated building and method of use

Abstract

The application discloses a multifunctional lifting device for fabricated buildings, which comprises a base, supporting columns fixedly installed on the upper surface of the base on both sides, and a lifting platform slidingly installed on the two supporting columns, a protective frame is arranged on the lifting platform, steel wires for pulling the lifting platform are fixedly installed on the upper surface of the lifting platform on both sides, a winding mechanism for winding the steel wires is arranged in the base, first guide wheels for guiding the steel wires are installed on the top end of the supporting columns and the side walls, grooves are formed in the side walls of the lifting platform, and first wedge blocks are arranged in the grooves. When the steel wires are broken and the lifting platform slides downward, the first wedge blocks slide downward synchronously with the lifting platform and fall onto the upper end of second wedge blocks, the falling lifting platform is blocked by the second wedge blocks, and thus the safety hazard caused by the falling of the lifting platform is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of lifting devices, and more particularly to a multifunctional lifting device for prefabricated buildings and its usage method. Background Technology

[0002] In prefabricated construction, lifting devices such as lifting frames and lifting platforms are indispensable tools. Lifting devices can not only deliver materials and tools to workers, but also enable workers to work at heights.

[0003] Existing lifting devices have a simple structure, mostly using a winch to pull a wire rope to lift the platform. When using the lifting platform to transport goods, the platform is prone to falling due to the sudden breakage of the wire rope during the ascent or descent, posing a significant safety hazard and resulting in low safety during use, thus requiring improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a multifunctional lifting device and its usage method for prefabricated buildings, so as to solve the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a multi-functional lifting device for prefabricated buildings, comprising a base, pillars fixedly installed on both sides of the upper surface of the base, and a lifting platform slidably installed on the two pillars. The lifting platform is provided with a protective frame. Steel wire ropes for pulling the lifting platform are fixedly installed on both sides of the upper surface of the lifting platform. A winding mechanism for winding the steel wire ropes is provided inside the base. First guide wheels for pulling the steel wire ropes are installed on the top and side walls of the pillars. Grooves are provided on both side walls of the lifting platform. First wedge blocks are provided inside the grooves. The first wedge blocks are integrated with the lifting platform. Several limiting mechanisms for preventing the lifting platform from falling are installed on the pillars.

[0006] Furthermore, the front and rear walls of the support column are provided with sliding grooves for guiding the lifting platform to move up and down, and the lifting platform is fixedly installed with a slider that matches the sliding groove.

[0007] Furthermore, the limiting mechanism includes a sleeve rotatably installed inside the support column, an extension rod slidably installed inside the sleeve, a second wedge block fixedly connected to one end of the extension rod, a portion of the second wedge block extending outside the support column, and a compression spring installed between the second wedge block and the sleeve.

[0008] Furthermore, a torsion spring is installed on the sleeve, one end of the torsion spring is fixedly connected to the sleeve, and the other end of the torsion spring is fixedly connected to the inner wall of the support column. One end of the sleeve extends to the outside of the support column and is fixedly connected to a half gear. A bidirectional rack is meshed with one side of the half gear.

[0009] Furthermore, a fixing plate is fixedly installed on one side wall of the support column, and a guide strip protrudes from the fixing plate. A guide groove matching the guide strip is opened on one side of the bidirectional rack. A limit block is fixedly installed on one side of the bottom end of the fixing plate, and a buffer spring is installed on the limit block. The top end of the buffer spring is connected to a fixing block, and the fixing block is located directly below the bidirectional rack. A tension spring is fixedly connected to the top end of the bidirectional rack, and one end of the tension spring is connected to the top end of the fixing plate.

[0010] Furthermore, a rotating shaft is rotatably mounted on the fixed plate, and a second guide wheel for traction wire rope is fixedly mounted on the rotating shaft. A full gear is provided on one side of the second guide wheel, and the full gear is fixedly sleeved on the rotating shaft and meshes with one side of the bidirectional rack.

[0011] Furthermore, the winding mechanism includes winding shafts rotatably mounted on both sides inside the base, with driven bevel gears mounted on opposite ends of the two winding shafts. A drive motor is mounted on the upper end of the base, and the output shaft of the drive motor extends into the base and is fixedly connected to a drive bevel gear. The drive bevel gear meshes with the two driven bevel gears.

[0012] Furthermore, a reciprocating lead screw is installed on one side above the take-up shaft, and the reciprocating lead screw is rotatably installed inside the base. A driven gear is fixedly sleeved on the reciprocating lead screw, and a drive gear is fixedly sleeved on the take-up shaft. The drive gear meshes with the driven gear, and the diameter of the drive gear is smaller than the diameter of the driven gear.

[0013] Furthermore, the reciprocating screw is provided with a screw nut, and a guide rod is fixedly installed inside the base. The guide rod passes through the screw nut and is slidably connected to the screw nut. A traction frame is fixedly installed on one side of the screw nut, and a traction wheel is rotatably installed on the traction frame. One end of the wire rope is wound around the winding shaft through the traction wheel.

[0014] A method for using a multi-functional lifting device for prefabricated buildings includes the following steps:

[0015] Step 1: Use the drive motor to rotate in the forward direction, so that the two winding shafts rotate synchronously to wind up the wire rope, causing the lifting platform to move upward;

[0016] Step 2: The lifting platform moves upward, the first wedge block squeezes the second wedge block and moves above the second wedge block. At this time, if the wire rope breaks, the lifting platform will slide down, and the second wedge block will block the first wedge block.

[0017] Step 3: When the lifting platform needs to be lowered, the drive motor is rotated in the opposite direction, which in turn drives the winding shaft to rotate in the opposite direction to unwind the wire rope;

[0018] Step 4: At this point, the lifting platform moves down, the second wedge block rotates 180 degrees, and the first wedge block slides down with the lifting platform to facilitate its downward movement.

[0019] Step 5: When the steel wire rope breaks during the descent of the lifting platform, the second wedge block flips and resets, blocking the first wedge block on the lifting platform during the descent.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention achieves a simple and convenient operation by sliding the lifting platform to the support column. The drive motor rotates the winding shaft to wind up the wire rope, which in turn pulls the lifting platform upwards along the groove on the support column via the slider. When the lifting platform needs to be moved downwards, the drive motor simply rotates in the opposite direction to unwind the wire rope.

[0022] 2. By setting a limiting mechanism, when the lifting platform moves upward, the wire rope drives the second guide wheel to rotate in the forward direction, causing the bidirectional rack to move upward and always be at the top. At this time, when the lifting platform moves upward, the first wedge block and the second wedge block match and abut, causing the second wedge block to be squeezed and contracted. When the wire rope breaks and the lifting platform slides down, the first wedge block slides down synchronously with the lifting platform and falls to the top of the second wedge block. Since the second wedge block is used to block and intercept the falling lifting platform, the safety hazards caused by the falling lifting platform are effectively avoided.

[0023] 3. By setting a full gear that meshes with a bidirectional rack, when the winding shaft unwinds, the shaft rotates in the opposite direction. The full gear meshes with the bidirectional rack and slides down. At the same time, when the bidirectional rack slides down, the half gear meshes with it and rotates 180 degrees, which allows the second wedge block to be flipped 180 degrees. At this time, when the lifting platform moves down, the first wedge block will not contact the second wedge block, thus allowing the lifting platform to move down steadily and making it easy to use.

[0024] 4. By setting up a winding mechanism, the present invention can drive the drive gear to rotate during winding, and the drive gear meshes with the driven gear to rotate the reciprocating screw. The rotation of the reciprocating screw drives the screw nut to make reciprocating linear motion along the guide rod, so that the second guide wheel on the screw nut can pull the wire rope, so that the wire rope can be evenly wound on the winding shaft, ensuring good winding effect. Attached Figure Description

[0025] Figure 1 This is a front view structural diagram of the present invention;

[0026] Figure 2This is a frontal cross-sectional view of the present invention.

[0027] Figure 3 This is a partial structural schematic diagram of the present invention;

[0028] Figure 4 This is a top view of the lifting platform and support structure of the present invention;

[0029] Figure 5 For the present invention Figure 3 Schematic diagram of part A in the middle;

[0030] Figure 6 For the present invention Figure 3 Schematic diagram of Part B in the middle section;

[0031] Figure 7 For the present invention Figure 4 Schematic diagram of the structure of part C in the middle;

[0032] Reference numerals: 1. Base; 101. Support column; 102. Slide groove; 2. Lifting platform; 201. Protective frame; 202. First wedge block; 3. Drive motor; 301. Drive bevel gear; 302. Rewinding shaft; 303. Driven bevel gear; 304. Drive gear; 305. Driven gear; 306. Guide rod; 307. Reciprocating screw; 308. Traction wheel; 309. Screw nut; 4. Wire rope; 401. First guide wheel; 5. Limiting mechanism; 501. Fixing plate; 502. Bidirectional rack; 503. Second wedge block; 504. Extension rod; 505. Sleeve; 506. Torsion spring; 507. Second guide wheel; 508. Full gear; 509. Half gear; 510. Buffer spring; 511. Guide bar; 512. Rotating shaft. Detailed Implementation

[0033] To make the technical means, creative features, achieved objectives, and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention.

[0034] Specific embodiments of the present invention are described below with reference to the accompanying drawings. Example 1

[0035] like Figure 1-7As shown, a multi-functional lifting device for prefabricated buildings includes a base 1, pillars 101 fixedly installed on both sides of the upper surface of the base 1, and a lifting platform 2 slidably installed on the two pillars 101. The lifting platform 2 is provided with a protective frame 201. Steel wire ropes 4 for pulling the lifting platform 2 are fixedly installed on both sides of the upper surface of the lifting platform 2. The base 1 is provided with a winding mechanism for winding the steel wire ropes 4. The top and side walls of the pillars 101 are provided with first guide wheels 401 for pulling the steel wire ropes 4. Grooves are provided on both side walls of the lifting platform 2. First wedge blocks 202 are provided inside the grooves. The first wedge blocks 202 are integrated with the lifting platform 2. Several limiting mechanisms 5 for preventing the lifting platform 2 from falling are installed on the pillars 101. Slide grooves 102 for guiding the lifting platform 2 to move up and down are provided on the front and rear walls of the pillars 101. A slider matching the slide groove 102 is fixedly installed on the lifting platform 2.

[0036] During operation, the winding mechanism can be used to wind up the wire rope 4, thereby pulling the lifting platform 2 upward. As the lifting platform 2 moves upward, it can also move upward along the slide groove 102 via the slider. At the same time, the first wedge block 202 can squeeze the limiting mechanism 5, causing the limiting mechanism 5 to contract. When the first wedge block 202 moves to be above the limiting mechanism 5, the limiting mechanism 5 protrudes to one side of the support column 101 and can limit the lifting platform 2, preventing the lifting platform 2 from falling due to the breakage of the wire rope 4. Example 2

[0037] like Figure 1-7As shown, in this embodiment, the limiting mechanism 5 includes a sleeve 505 rotatably installed inside the support column 101. An extension rod 504 is slidably installed inside the sleeve 505. One end of the extension rod 504 is fixedly connected to a second wedge block 503. A portion of the second wedge block 503 extends outside the support column 101. A compression spring is installed between the second wedge block 503 and the sleeve 505. A torsion spring 506 is installed on the sleeve 505. One end of the torsion spring 506 is fixedly connected to the sleeve 505, and the other end of the torsion spring 506 is fixedly connected to the inner wall of the support column 101. One end of the sleeve 505 extends to the outside of the support column 101 and is fixedly connected to a half gear 509. A bidirectional rack 502 is meshed with one side of the half gear 509. A fixing plate 501 is fixedly installed on one side wall of the support column 101. A guide strip 511 protrudes from the fixed plate 501. A guide groove matching the guide strip 511 is opened on one side of the double rack 502. A limit block is fixedly installed on one side of the bottom of the fixed plate 501. A buffer spring 510 is installed on the limit block. A fixed block is connected to the top of the buffer spring 510, and the fixed block is located directly below the double rack 502. A tension spring is fixedly connected to the top of the double rack 502, and one end of the tension spring is connected to the top of the fixed plate 501. A rotating shaft 512 is rotatably installed on the fixed plate 501. A second guide wheel 507 for traction of the wire rope 4 is fixedly installed on the rotating shaft 512. A full gear 508 is provided on one side of the second guide wheel 507. The full gear 508 is fixedly sleeved on the rotating shaft 512 and meshes with one side of the double rack 502.

[0038] During operation, when the wire rope 4 is wound up, the lifting platform 2 moves upward. At this time, the wire rope 4 passes through the second guide wheel 507, where the surface of the second guide wheel 507 is provided with a damping pad to increase the friction between the wire rope 4 and the second guide wheel 507. The wire rope 4 drives the second guide wheel 507 to rotate in the forward direction. At this time, the lowest teeth of the double-sided rack 502 contact the full gear 508. The double-sided rack 502 remains unchanged in its initial state. When the lifting platform 2 moves upward, the first wedge block 202 squeezes the second wedge block 503 during the upward movement. The extension rod 504 is provided with a protrusion, and the sleeve 505 has a guide groove inside that matches the protrusion. 04 and sleeve 505 are slidably connected. When the second wedge block 503 is squeezed, it can squeeze the compression spring. At this time, the extension rod 504 drives the second wedge block 503 to move towards one end of the sleeve 505, so that the first wedge block 202 moves above the second wedge block 503. At this time, the compression spring pushes the second wedge block 503 to extend outward and reset. When the wire rope 4 breaks during the lifting process, the lifting platform 2 slides down, and the first wedge block 202 slides down synchronously. When the first wedge block 202 slides down with the lifting platform 2 to the upper end of the second wedge block 503, the second wedge block 503 can block the first wedge block 202, thereby preventing the lifting platform 2 from falling.

[0039] When the wire rope 4 is unwound, the lifting platform 2 moves downward. At this time, the second guide wheel 507 rotates in the opposite direction, and the full gear 508 rotates in the opposite direction and engages the double-sided rack 502 to slide downward. At this time, the tension spring is stretched by the double-sided rack 502. As the double-sided rack 502 moves downward, it engages the half gear 509 to rotate 180 degrees, thereby causing the sleeve 505 to rotate 180 degrees synchronously. At this time, the torsion spring 506 is in a taut state. Simultaneously, the extension rod 504 drives the second wedge block 503 to rotate 180 degrees synchronously, and the second wedge block 503 is flipped. At this time, the first wedge block 202 slides down with the lifting platform 2, which facilitates the lowering of the lifting platform 2. When the steel wire rope 4 breaks during the lowering process of the lifting platform 2, the torsion spring 506 drives the sleeve 505 to rotate and reset, and cooperates with the tension spring to make the bidirectional rack 502 move up and reset. At this time, the second wedge block 503 flips and resets, which can block the first wedge block 202 on the lifting platform 2 during the lowering process, thereby preventing the lifting platform 2 from falling due to the breakage of the steel wire rope 4 during the descent, and increasing the safety of use.

[0040] The limiting mechanism 5 is provided in multiple ways and is evenly distributed on the support column 101. At least one first guide wheel 401 is installed between two adjacent limiting mechanisms 5. The first guide wheel 401 and the second guide wheel 507 are not on the same vertical axis, which can increase the friction between the wire rope 4 and the second guide wheel 507. Example 3

[0041] like Figure 1-7 As shown, in this embodiment, the winding mechanism includes winding shafts 302 rotatably mounted on both sides inside the base 1. Driven bevel gears 303 are mounted on opposite ends of the two winding shafts 302. A drive motor 3 is mounted on the upper end of the base 1. The output shaft of the drive motor 3 extends into the base 1 and is fixedly connected to a drive bevel gear 301, which meshes with the two driven bevel gears 303. A reciprocating lead screw 307 is mounted on one side above the winding shafts 302, and the reciprocating lead screw 307 is rotatably mounted inside the base 1. A driven gear 303 is fixedly sleeved on the reciprocating lead screw 307. 5. A drive gear 304 is fixedly sleeved on the take-up shaft 302. The drive gear 304 meshes with the driven gear 305, and the diameter of the drive gear 304 is smaller than the diameter of the driven gear 305. A screw nut 309 is provided on the reciprocating screw 307. A guide rod 306 is fixedly installed inside the base 1. The guide rod 306 passes through the screw nut 309 and is slidably connected to the screw nut 309. A traction frame is fixedly installed on one side of the screw nut 309. A traction wheel 308 is rotatably installed on the traction frame. One end of the wire rope 4 is wound around the take-up shaft 302 through the traction wheel 308.

[0042] During operation, the drive motor 3 drives the drive bevel gear 301 to rotate, and the drive bevel gear 301 rotates simultaneously with the two driven bevel gears 303, thereby causing the two take-up shafts 302 to rotate synchronously. The rotation of the two take-up shafts 302 is used to wind or unwind the wire rope 4. At the same time, the rotation of the take-up shafts 302 drives the drive gear 304 to rotate and mesh with the driven gear 305. The rotation of the driven gear 305 drives the reciprocating screw 307 to rotate synchronously, so that the second guide wheel 507 on the screw nut 309 can pull the wire rope 4, so that the wire rope 4 can be evenly wound on the take-up shaft 302, ensuring a good winding effect. Example 4

[0043] A method for using a multi-functional lifting device for prefabricated buildings includes the following steps:

[0044] Step 1: The drive motor 3 rotates in the forward direction to drive the drive bevel gear 301 to rotate. At the same time, the drive bevel gear 301 rotates with the two driven bevel gears 303, so that the two winding shafts 302 rotate synchronously to wind up the wire rope 4, causing the lifting platform 2 to move upward.

[0045] Step 2: The lifting platform 2 moves upward, the first wedge block 202 squeezes the second wedge block 503 and moves above the second wedge block 503. At this time, if the wire rope 4 breaks, the lifting platform 2 slides down, the first wedge block 202 slides down synchronously, and the second wedge block 503 blocks the first wedge block 202 to prevent the lifting platform 2 from falling.

[0046] Step 3: When the lifting platform 2 needs to be lowered, the drive motor 3 rotates in the opposite direction, which in turn drives the winding shaft 302 to rotate in the opposite direction to unwind the wire rope 4.

[0047] Step 4: The lifting platform 2 moves down. At this time, the second guide wheel 507 rotates in the opposite direction. The full gear 508 rotates in the opposite direction and engages with the double rack 502 to slide down. At this time, the tension spring is stretched by the double rack 502. As the double rack 502 moves down, it engages with the half gear 509 to rotate 180 degrees, so that the second wedge block 503 rotates 180 degrees synchronously. At this time, the first wedge block 202 slides down with the lifting platform 2, which facilitates the downward movement of the lifting platform 2.

[0048] Step 5: When the steel wire rope 4 breaks during the downward movement of the lifting platform 2, the torsion spring 506 drives the sleeve 505 to rotate and reset, and in conjunction with the tension spring, the bidirectional rack 502 moves upward and resets. At this time, the second wedge block 503 flips and resets, and blocks the first wedge block 202 on the lifting platform 2 during the downward movement.

[0049] Working principle: The drive motor 3 can rotate in the forward direction to drive the drive bevel gear 301 to rotate, and the drive bevel gear 301 rotates simultaneously with the two driven bevel gears 303, so that the two winding shafts 302 can rotate synchronously to wind up the wire rope 4.

[0050] When the wire rope 4 is wound up, the lifting platform 2 moves upward. At this time, the wire rope 4 passes through the second guide wheel 507, where the surface of the second guide wheel 507 is provided with a damping pad to increase the friction between the wire rope 4 and the second guide wheel 507. The wire rope 4 drives the second guide wheel 507 to rotate in the forward direction. At this time, the lowest teeth of the double-sided rack 502 contact the full gear 508. The double-sided rack 502 remains unchanged in its initial state. When the lifting platform 2 moves upward, the first wedge block 202 squeezes the second wedge block 503 during the upward movement. The extension rod 504 is provided with a protrusion, and the sleeve 505 has a guide groove inside that matches the protrusion. The extension rod 504 is slidably connected to the sleeve 505. When the second wedge block 503 is compressed, it can compress the compression spring. At this time, the extension rod 504 drives the second wedge block 503 to move towards one end of the sleeve 505, so that the first wedge block 202 moves above the second wedge block 503. At this time, the compression spring pushes the second wedge block 503 to extend outward and reset. When the wire rope 4 breaks during the ascent, the lifting platform 2 slides down, and the first wedge block 202 slides down synchronously. When the first wedge block 202 slides down with the lifting platform 2 to the upper end of the second wedge block 503, the second wedge block 503 can block the first wedge block 202, thereby preventing the lifting platform 2 from falling.

[0051] Furthermore, as the winding shaft 302 rotates, it can drive the drive gear 304 to rotate and mesh with the driven gear 305 to rotate. As the driven gear 305 rotates, it can drive the reciprocating screw 307 to rotate synchronously. This allows the second guide wheel 507 on the screw nut 309 to pull the wire rope 4, so that the wire rope 4 can be evenly wound on the winding shaft 302, ensuring a good winding effect.

[0052] When the lifting platform 2 needs to be lowered, the drive motor 3 can be rotated in the opposite direction to drive the winding shaft 302 to rotate in the opposite direction for unwinding.

[0053] When the wire rope 4 is unwound, the lifting platform 2 moves downward. At this time, the second guide wheel 507 rotates in the opposite direction, and the full gear 508 rotates in the opposite direction and engages the double-sided rack 502 to slide downward. At this time, the tension spring is stretched by the double-sided rack 502. As the double-sided rack 502 moves downward, it engages the half gear 509 to rotate 180 degrees, thereby causing the sleeve 505 to rotate 180 degrees synchronously. At this time, the torsion spring 506 is in a taut state. Simultaneously, the extension rod 504 drives the second wedge block 503 to rotate 180 degrees synchronously, and the second wedge block 503 is flipped. At this time, the first wedge block 202 slides down with the lifting platform 2, which facilitates the lowering of the lifting platform 2. When the steel wire rope 4 breaks during the lowering process of the lifting platform 2, the torsion spring 506 drives the sleeve 505 to rotate and reset, and cooperates with the tension spring to make the bidirectional rack 502 move up and reset. At this time, the second wedge block 503 flips and resets, which can block the first wedge block 202 on the lifting platform 2 during the lowering process, thereby preventing the lifting platform 2 from falling due to the breakage of the steel wire rope 4 during the descent, and increasing the safety of use.

[0054] Multiple limiting mechanisms 5 are provided and evenly distributed on the support column 101, which can provide multiple layers of fall protection for the lifting platform 2. At least one first guide wheel 401 is installed between two adjacent limiting mechanisms 5, and the first guide wheel 401 and the second guide wheel 507 are not on the same vertical axis, thereby increasing the friction between the wire rope 4 and the second guide wheel 507.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional lifting device for prefabricated buildings, comprising a base (1), a support column (101) fixedly installed on the upper surface of the base (1) on both sides, and a lifting platform (2) slidingly installed on the two support columns (101), wherein a protective frame (201) is arranged on the lifting platform (2). The lifting platform (2) is provided with a steel wire rope (4) for pulling the lifting platform (2) on both sides of the upper surface, the base (1) is internally provided with a winding mechanism for winding the steel wire rope (4), the top of the support (101) and the side wall are both provided with a first guide wheel (401) for pulling the steel wire rope (4), the lifting platform (2) is provided with a groove on both side walls, the groove is internally provided with a first wedge block (202), the first wedge block (202) is integrally arranged with the lifting platform (2), and the support (101) is provided with a plurality of limiting mechanisms (5) for preventing the lifting platform (2) from falling. The limiting mechanism (5) comprises a sleeve (505) rotatably arranged in the support (101), an extension rod (504) slidably arranged in the sleeve (505), a second wedge block (503) fixedly connected to one end of the extension rod (504), and a compression spring arranged between the second wedge block (503) and the sleeve (505). A torsional spring (506) is arranged on the sleeve (505), one end of the torsional spring (506) is fixedly connected with the sleeve (505), the other end of the torsional spring (506) is fixedly connected with the inner wall of the support (101), one end of the sleeve (505) extends to the outside of the support (101) and is fixedly connected with a half gear (509), and the half gear (509) is meshingly connected with one side of a bidirectional rack (502). A fixed plate (501) is fixedly arranged on one side wall of the support (101), a tensile spring is fixedly connected to the top end of the bidirectional rack (502), and one end of the tensile spring is connected with the top end of the fixed plate (501). A rotating shaft (512) is rotatably arranged on the fixed plate (501), a second guide wheel (507) for pulling the steel wire rope (4) is fixedly arranged on the rotating shaft (512), a full gear (508) is arranged on one side of the second guide wheel (507), and the full gear (508) is fixedly sleeved on the rotating shaft (512) and is meshingly connected with the other side of the bidirectional rack (502).

2. The multifunctional lifting device for fabricated buildings according to claim 1, characterized in that: The front wall and the rear wall of the support (101) are both provided with a sliding groove (102) for guiding the lifting platform (2) to move up and down, and the lifting platform (2) is fixedly provided with a sliding block matched with the sliding groove (102).

3. The multifunctional lifting device for fabricated buildings according to claim 2, characterized in that: The fixed plate (501) is provided with a guide strip (511), the bidirectional rack (502) is provided with a guide groove matched with the guide strip (511) on one side, a limiting block is fixedly arranged on one side of the bottom end of the fixed plate (501), a buffer spring (510) is arranged on the limiting block, a fixed block is connected to the top end of the buffer spring (510), and the fixed block is located directly below the bidirectional rack (502).

4. The multifunctional lifting device for fabricated buildings according to claim 3, characterized in that: The winding mechanism comprises winding shafts (302) rotatably mounted on both sides of the base (1), one ends of the two winding shafts (302) are respectively provided with driven bevel gears (303), a driving motor (3) is mounted on the upper end of the base (1), the output shaft of the driving motor (3) extends into the base (1) and is fixedly connected with a driving bevel gear (301), and the driving bevel gear (301) is in meshing connection with the two driven bevel gears (303).

5. A multi-functional lifting device for fabricated buildings as claimed in claim 4 wherein: A reciprocating screw rod (307) is mounted on one side above the winding shaft (302) and rotatably mounted in the base (1), a driven gear (305) is fixedly sleeved on the reciprocating screw rod (307), a driving gear (304) is fixedly sleeved on the winding shaft (302), the driving gear (304) is in meshing connection with the driven gear (305), and the diameter of the driving gear (304) is smaller than that of the driven gear (305).

6. A multi-functional lifting device for fabricated buildings as claimed in claim 5 wherein: The reciprocating screw rod (307) is provided with a screw nut (309), a guide rod (306) is fixedly mounted in the base (1), the guide rod (306) penetrates through the screw nut (309) and is in sliding connection with the screw nut (309), a traction frame is fixedly mounted on one side of the screw nut (309), a traction wheel (308) is rotatably mounted on the traction frame, and one end of the steel wire rope (4) is wound on the winding shaft (302) through the traction wheel (308).

7. A method of using a multi-functional lifting device for a fabricated building based on claim 6, characterized in that, The method comprises the following steps: Step one: the driving motor (3) is positively rotated to synchronously rotate the two winding shafts (302) to wind the steel wire rope (4) and to move up the lifting platform (2); Step two: the lifting platform (2) is moved up, the first wedge block (202) is pressed against the second wedge block (503) and is moved above the second wedge block (503), at this time, if the steel wire rope (4) is broken, the lifting platform (2) is lowered, and the second wedge block (503) blocks the first wedge block (202); Step three: when the lifting platform (2) needs to be lowered, the driving motor (3) is reversely rotated to reversely rotate the winding shaft (302) to unwind the steel wire rope (4); Step four: at this time, the lifting platform (2) is moved down, the second wedge block (503) is rotated by 180 degrees, at this time, the first wedge block (202) is slid off along with the lifting platform (2) to facilitate the movement of the lifting platform (2) downward; Step five: when the steel wire rope (4) is broken during the movement of the lifting platform (2) downward, the second wedge block (503) is flipped back to position and blocks the first wedge block (202) on the lifting platform (2) during the downward movement.

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