Lifting device for building construction

Abstract

The utility model relates to the technical field of building construction, in particular to a lifting device for building construction, which solves the problem that centers of a material table and the lifting device are deviated after the height of the material table is increased by arranging a sliding plate II and a balancing weight. Electric adjustment of a sliding plate II and a balancing weight is achieved through arrangement of a motor III and a screw rod, and the supporting distance of the rear end of the bottom frame is prolonged through arrangement of a lead screw II, the motor II, a sliding plate I and a rear connecting plate; the lifting device is stable in overall structure and reasonable in design, meets the requirement for material lifting in a building use site, eliminates the problem that the gravity center shifts after the height of materials is increased, and guarantees use safety.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically a lifting device for building construction. Background Technology

[0002] During construction, materials are frequently handled using tools, which are generally done manually or with equipment. For example, manual labor is used in conjunction with trolleys to transfer materials. When materials need to be lifted or lowered, they are either thrown and picked up manually or in conjunction with a manual forklift.

[0003] The manual throwing and catching method for lifting materials is not only time-consuming and labor-intensive with low work efficiency, but also poses significant safety hazards, easily causing injury to workers and damaging the materials.

[0004] The use of manual forklifts avoids the safety hazards caused by manual throwing and catching. While lifting materials, the wheels of the manual forklift can also be used to move the materials. However, due to the limitations of the manual forklift structure, when the material is raised, the overall center of gravity of the manual forklift rises and tilts to the side where the material is placed, which greatly reduces the stability of the manual forklift and even poses a certain risk of tipping over, thus creating certain safety hazards. Utility Model Content

[0005] The purpose of this utility model is to provide a lifting device for construction, which can maintain the overall stability of the device after the material is lifted to a certain height, thereby ensuring the smooth and safe operation of material lifting.

[0006] To achieve the aforementioned technical effects, this utility model provides a lifting device for construction, comprising a frame, reinforcing bars, handles, a material platform, a drive assembly, and a counterweight assembly. The frame includes a base frame and a gantry. The base frame includes side strips and a central bottom beam. Two side strips are provided, parallel to each other. The central bottom beam is fixedly connected between the two side strips and perpendicular to them, positioned at the midpoint of the side strips' length. The gantry includes a top beam and two columns, parallel to each other. The top beam is fixedly connected to the tops of the two columns, forming an "n" shape. The material platform includes a vertical plate, a base plate, and rear side plates. The base plate is fixedly connected to the lower end of one side wall of the vertical plate, perpendicular to the vertical plate, forming a "┘" shape. Two rear side plates are provided, parallel to each other, and fixedly connected to the side wall of the vertical plate away from the base plate. The two rear side plates are slidably connected to the inner sides of the two columns. Two reinforcing bars are provided, each inclined... Connected between a column and a side strip, with a handle fixedly connected to the rear sides of the two columns, the drive assembly includes a lead screw I, a motor I, a connecting plate, and a lead screw seat I. The lead screw I is located between the two columns, with its two ends rotatably connected to the top beam and the central bottom beam, respectively. The motor I is fixedly connected to the top beam, and the output shaft of the motor I is fixedly connected to the lead screw I via a coupling. The connecting plate is fixedly connected between the two rear side plates and to the column plate. The connecting plate has a connecting hole I, and the lead screw seat I is fixedly connected within the connecting hole I. The lead screw seat I is slidably connected to the lead screw I. The counterweight assembly includes a sliding plate II, located between the two side strips. The left and right side walls of the sliding plate II are slidably connected to the inner walls of the two side strips, respectively. The sliding plate II is located on the rear side of the central bottom beam, with protrusions II extending from both the left and right side walls. The inner walls of the two side strips on the rear side of the central bottom beam each have a groove I, with two protrusions II slidably connected within the two grooves I. A counterweight is connected to the top surface of the sliding plate II.

[0007] Furthermore, it includes a telescopic assembly, which comprises a lead screw II, a motor II, a sliding plate I, a lead screw seat II, a bevel gear I, and a bevel gear II. The bottom frame includes a front bottom beam, which is fixedly connected between the two side strips and is perpendicular to the side strips. The front bottom beam is located at the front end of the side strips along their length. The front end of the lead screw II is rotatably connected to the front bottom beam, and the rear end of the lead screw II is rotatably connected to the central bottom beam. The sliding plate I is connected between the two side strips and is located in front of the central bottom beam. The left and right side walls of the sliding plate I are slidably connected to the inner walls of the two side strips, respectively. The sliding plate I is provided with connecting... Connecting hole II, lead screw seat II is fixedly connected to connecting hole II, lead screw seat II is slidably connected to lead screw II, motor II is fixedly connected to the side wall of the front bottom beam facing the center bottom beam through a bracket, bevel gear II is fixedly connected to the output shaft of motor II, bevel gear I is fixedly connected to lead screw II, bevel gear I is set close to the front bottom beam, bevel gear I meshes with bevel gear II, the counterweight assembly includes screw I and motor III, motor III is fixedly connected to the top surface of sliding plate I, the front end of screw I is fixedly connected to the output shaft of motor III through a coupling, and the sliding plate II is provided with a screw hole, the screw hole is slidably connected to screw I.

[0008] Furthermore, the telescopic assembly includes a rear connecting plate and sliding columns. There are two sliding columns, which are parallel to each other. The rear ends of the two sliding columns are fixedly connected to the side wall of the rear connecting plate. The rear ends of the two side strips are provided with inner holes. The rear connecting plate is located behind the two side strips. The two sliding columns are slidably connected to the two inner holes respectively. The rear end of the screw I is rotatably connected to the rear connecting plate.

[0009] Furthermore, each of the two column sidewalls is provided with a sliding groove II, which is set along the height direction of the column. Each of the two rear sideplates has a protrusion I extending out of its outer wall, and the two protrusions I are slidably connected in the two sliding grooves II respectively.

[0010] Furthermore, the lead screw I includes a lead screw part I and a shaft part I, which are coaxial. There are two shaft parts I, which are respectively located at the upper and lower ends of the lead screw part I. The lead screw seat I is slidably connected to the lead screw part I. The two shaft parts I are respectively rotated on the top beam and the central bottom beam through bearings. The top beam has holes for connecting the bearings and the shaft parts I, and the central bottom beam has holes for connecting the bearings and the shaft parts I.

[0011] Furthermore, the lead screw II includes a lead screw section II, a shaft section II, and a shaft section III. The lead screw section II, shaft section II, and shaft section III are all coaxial. The shaft section II is located at the front end of the lead screw section II. There are two shaft sections III. One of the two shaft sections III is located at the front end of the shaft section II, and the other shaft section III is located at the rear end of the lead screw section II. The lead screw seat II is slidably connected to the lead screw section II. The bevel gear I is fixedly connected to the shaft section II. The two shaft sections III are rotatably connected to the front bottom beam and the center bottom beam respectively through bearings. The front bottom beam has holes for connecting the bearings and the shaft section III, and the center bottom beam has holes for connecting the bearings and the shaft section III.

[0012] Furthermore, the screw I includes a screw section, a shaft section IV, and a shaft section V. The screw section, shaft section IV, and shaft section V are all coaxial. Shaft section V is located at the front end of the screw section, and shaft section IV is located at the rear end of the screw section. Shaft section V is fixedly connected to the output shaft of motor III through a coupling. Shaft section IV is rotatably connected to the rear connecting plate through a bearing. The rear connecting plate has holes for connecting the bearing and shaft section IV.

[0013] Furthermore, the top surface of the sliding plate II is provided with a screw II, and the counterweight is provided with a plug hole. The plug hole is connected to the screw II. There are multiple counterweights, which are stacked on the top surface of the sliding plate II. The plug holes of the multiple counterweights are all connected to the screw II.

[0014] Furthermore, a pulley is rotatably connected to the rear connecting plate, and a wheel groove is provided on the bottom surface of the rear connecting plate. A shaft groove is provided on both parallel inner walls of the wheel groove. The pulley is located in the wheel groove, and the two ends of the pulley's shaft are engaged in the two shaft grooves. Multiple wheel grooves are provided on the bottom surface of the rear connecting plate, and pulleys are connected in each of the multiple wheel grooves.

[0015] Furthermore, each of the two side strips has a limiting block I on its inner wall, located in front of the central bottom beam and close to it; each of the two side strips also has a limiting block II on its inner wall, located behind the central bottom beam and close to the rear connecting plate; each of the two columns has a limiting block III on its front side and close to the bottom frame.

[0016] The beneficial effects of this utility model are as follows: The sliding plate II and counterweight compensate for the center shift caused by the material platform height increase; the motor III and screw enable electric adjustment of the sliding plate II and counterweight; and the screw rod II, motor II, sliding plate I, and rear connecting plate extend the rear support distance of the bottom frame. This utility model has a stable overall structure and a reasonable design, meeting the requirements for material lifting and lowering in construction sites. It effectively eliminates the problem of center shift after material height increase, ensuring safe use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the gantry of this utility model;

[0019] Figure 3 This utility model Figure 2 AA section view;

[0020] Figure 4 This is a partial structural diagram of the lead screw II of this utility model;

[0021] Figure 5 This utility model Figure 4 BB section view;

[0022] Figure 6 This is a partial structural diagram of the screw section of this utility model;

[0023] Figure 7 This utility model Figure 6 CC section view;

[0024] Figure 8 This utility model Figure 6 DD sectional view;

[0025] Figure 9 This is a partial structural diagram of the pulley of this utility model.

[0026] Figure 10 This is a schematic diagram of the structure of lead screw I of this utility model.

[0027] Figure 11 This is a schematic diagram of the structure of the lead screw II and bevel gear I of this utility model.

[0028] Figure 12 This is a schematic diagram of the screw structure of this utility model.

[0029] Figure 13 This is a schematic diagram of the structure of the present invention when the sliding plate II moves to the rear and the rear connecting plate extends.

[0030] In the diagram: 1. Frame; 101. Base frame; 1011. Side strip; 1012. Front bottom beam; 1013. Center bottom beam; 1014. Inner hole; 1015. Slide groove I; 102. Gantry; 1021. Top beam; 1022. Column; 1023. Slide groove II; 2. Rib; 3. Handle; 4. Material platform; 401. Vertical plate; 402. Base plate; 403. Rear side plate; 404. Protrusion I; 5. Lifting drive assembly; 6. Telescopic assembly; 7. Counterweight assembly; 8. Lead screw I; 801. Lead screw part I; 802. Shaft part I; 9. Motor I; 10. Connecting plate; 1001. Connecting hole I; 11. Lead screw seat I; 12. Lead screw II; 12 01. Lead screw section II; 1202. Shaft section II; 1203. Shaft section III; 13. Motor II; 14. Sliding plate I; 1401. Connecting hole II; 15. Lead screw seat II; 16. Bevel gear I; 17. Bevel gear II; 18. Limiting block I; 19. Screw; 1901. Screw section; 1902. Shaft section IV; 1903. Shaft section V; 20. Motor III; 21. Sliding plate II; 2101. Screw hole; 2102. Screw; 2103. Protrusion II; 22. Counterweight; 2201. Insertion hole; 23. Rear connecting plate; 2301. Wheel groove; 2302. Shaft groove; 24. Sliding column; 25. Pulley; 26. Limiting block II; 27. Limiting block III. Detailed Implementation

[0031] like Figures 1-13 This utility model discloses a lifting device for construction, comprising a frame 1, reinforcing bars 2, handles 3, a material platform 4, a drive assembly 5, and a counterweight assembly 7. The frame 1 includes a base frame 101 and a gantry 102. The base frame 101 includes side strips 1011 and a central bottom beam 1013. Two side strips 1011 are provided, and the two side strips 1011 are parallel. The central bottom beam 1013 is fixedly connected between the two side strips 1011 and is perpendicular to the two side strips 1011. The central bottom beam 1013 is located at the middle of the length of the side strips 1011. The gantry 102 includes a top beam 1021 and two columns 1022. The two columns 1022 are provided. 022 is parallel, and the top beam 1021 is fixedly connected to the top of the two columns 1022. The two columns 1022 and the top beam 1021 form an "n" shape. The material platform 4 includes a vertical plate 401, a bottom plate 402, and a rear side plate 403. The bottom plate 402 is fixedly connected to the lower end of one side wall of the vertical plate 401. The bottom plate 402 is perpendicular to the vertical plate 401, and the bottom plate 402 and the vertical plate 401 form a "┘" shape. There are two rear side plates 403, which are parallel to each other. Both rear side plates 403 are fixedly connected to the side wall of the vertical plate 401 away from the bottom plate 402. The two rear side plates 403 are slidably connected to the inner side of the two columns 1022. There are two ribs 2, each... Each reinforcing bar 2 is obliquely connected between a column 1022 and a side strip 1011. A handle 3 is fixedly connected to the rear side of the two columns 1022. The drive assembly 5 includes a lead screw I8, a motor I9, a connecting plate 10, and a lead screw seat I11. The lead screw I8 is located between the two columns 1022, with its two ends rotatably connected to the top beam 1021 and the central bottom beam 1013, respectively. The motor I9 is ​​fixedly connected to the top beam 1021, and its output shaft is fixedly connected to the lead screw I8 via a coupling. The connecting plate 10 is fixedly connected between the two rear side plates 403 and is fixedly connected to the upright plate 401. The connecting plate 10 has a connecting hole I1001. The rod seat I11 is fixedly connected to the connecting hole I1001, the lead screw seat I11 is slidably connected to the lead screw I8, the counterweight assembly 7 includes a sliding plate II21, the sliding plate II21 is located between two side strips 1011, the left and right side walls of the sliding plate II21 are slidably connected to the inner walls of the two side strips 1011 respectively, the sliding plate II21 is located on the rear side of the central bottom beam 1013, the left and right side walls of the sliding plate II21 each have a protrusion II2103 extending out, the inner walls of the two side strips 1011 on the rear side of the central bottom beam 1013 each have a groove I1015, the two protrusions II2103 are slidably connected in the two grooves I1015 respectively, and the counterweight block 22 is connected to the top surface of the sliding plate II21.

[0032] The structure of the base frame 101, mast 102, and material platform 4 in this utility model is basically the same as that of existing manual forklifts or lifting devices. The lifting and lowering of the material platform 4 in this utility model is achieved by the lead screw seat I11 and the lead screw I8. In addition to the driving method of the lead screw seat I11 and the lead screw I8 described in this utility model, the lifting and lowering of the material platform 4 can also adopt the sprocket and chain driving method commonly used in existing manual forklifts. If the sprocket and chain driving method is to be used, it is only necessary to replace the connecting plate with the shaft supporting the sprocket. Since the sprocket and chain driving method is a common practice used by those skilled in the art, the specific replacement method and detailed structure will not be described in detail here.

[0033] This invention solves the problem of the device's center of gravity shifting after the material platform 4 is raised by setting a counterweight component 7. When the material platform 4 is raised carrying materials, the sliding plate II 21 is moved backward, thereby offsetting the center of gravity shift caused by the material platform 4 being raised carrying materials. At the same time, the setting of the sliding plate II 21 and the counterweight block 22 also improves the overall stability of the frame 1.

[0034] The system includes a telescopic assembly 6, which comprises a lead screw II 12, a motor II 13, a sliding plate I 14, a lead screw seat II 15, a bevel gear I 16, and a bevel gear II 17. The bottom frame 101 includes a front bottom beam 1012, which is fixedly connected between two side strips 1011 and perpendicular to them. The front bottom beam 1012 is located at the front end of the side strips 1011 along their length. The front end of the lead screw II 12 is rotatably connected to the front bottom beam 1012, and the rear end is rotatably connected to the central bottom beam 1013. The sliding plate I 14 is connected between the two side strips 1011 and is located in front of the central bottom beam 1013. The left and right side walls of the sliding plate I 14 are slidably connected to the inner walls of the two side strips 1011, respectively. The sliding plate I 14 is equipped with… The system includes a connecting hole II1401, a lead screw seat II15 fixedly connected to the connecting hole II1401, a lead screw seat II15 slidably connected to the lead screw II12, a motor II13 fixedly connected to the side wall of the front bottom beam 1012 facing the center bottom beam 1013 via a bracket, a bevel gear II17 fixedly connected to the output shaft of the motor II13, a bevel gear I16 fixedly connected to the lead screw II12, the bevel gear I16 being positioned close to the front bottom beam 1012, and the bevel gear I16 meshing with the bevel gear II17. The counterweight assembly 7 includes a screw I19 and a motor III20, the motor III20 being fixedly connected to the top surface of the sliding plate I14, the front end of the screw I19 being fixedly connected to the output shaft of the motor III20 via a coupling, and a screw hole 2101 being provided on the sliding plate II21, the screw hole 2101 being slidably connected to the screw I19.

[0035] The telescopic assembly 6 includes a rear connecting plate 23 and sliding columns 24. There are two sliding columns 24, which are parallel to each other. The rear ends of the two sliding columns 24 are fixedly connected to the side wall of the rear connecting plate 23. The rear ends of the two side strips 1011 are provided with inner holes 1014. The rear connecting plate 23 is located behind the two side strips 1011. The two sliding columns 24 are slidably connected in the two inner holes 1014 respectively. The rear end of the screw I 19 is rotatably connected to the rear connecting plate 23.

[0036] Both columns 1022 are provided with sliding grooves II 1023 on their side walls. The sliding grooves II 1023 are arranged along the height direction of the columns 1022. Both rear side plates 403 have protrusions I 404 extending from their outer walls. The two protrusions I 404 are slidably connected in the two sliding grooves II 1023 respectively.

[0037] To further improve the ease of use of this utility model, this utility model uses a motor Ⅲ20 and a screw Ⅰ19 to drive the sliding plate Ⅱ21 and the counterweight 22 to slide back and forth, thereby realizing the electric adjustment of the sliding plate Ⅱ21 and the counterweight 22; while the motor Ⅱ13 drives the bevel gear Ⅱ17 to rotate, the bevel gear Ⅱ17 drives the bevel gear Ⅰ16 to rotate, the rotation of the bevel gear Ⅰ16 drives the lead screw Ⅱ12 to rotate, and when the lead screw Ⅱ12 rotates, it drives the sliding plate Ⅰ14 to slide back and forth through the lead screw seat Ⅱ15. The sliding plate Ⅰ14 drives the motor Ⅲ20 to slide, thereby effectively increasing the adjustment distance of the sliding plate Ⅱ21 and the counterweight 22.

[0038] In addition, when the sliding plate I14 slides back and forth, driving the motor III20 to slide, the screw I19 moves back and forth with the motor III20. The movement of the screw I19 drives the rear connecting plate 23 to move back and forth. The back and forth movement of the rear connecting plate 23 changes the support distance at the rear of the frame 1, thereby improving the support stability at the rear of the frame 1.

[0039] The columns 1022 and the slides Ⅱ 1023 are configured to provide support and guidance for the movement of the rear connecting plate 23.

[0040] It should be noted that in this invention, the axes of lead screw II 12 and screw I 19 are set on the same vertical plane, and the axis of lead screw I 8 driving the material platform 4 is misaligned with the axes of lead screw II 12 and screw I 19, thereby preventing interference between lead screw I 8 and lead screw II 12 and screw I 19.

[0041] The lead screw I8 includes a lead screw part I801 and a shaft part I802, which are coaxial. There are two shaft parts I802, which are respectively located at the upper and lower ends of the lead screw part I801. The lead screw seat I is slidably connected to the lead screw part I801. The two shaft parts I802 are rotated on the top beam 1021 and the center bottom beam 1013 respectively through bearings. The top beam 1021 is provided with holes for connecting the bearings and the shaft parts I802, and the center bottom beam 1013 is provided with holes for connecting the bearings and the shaft parts I802.

[0042] Lead screw II12 includes lead screw part II1201, shaft part II1202, and shaft part III1203. Lead screw part II1201, shaft part II1202, and shaft part III1203 are all coaxial. Shaft part II1202 is located at the front end of lead screw part II1201. There are two shaft parts III1203; one shaft part III1203 is located at the front end of shaft part II1202, and the other shaft part III1203... 203 is located at the rear end of the lead screw part II1201. The lead screw seat II15 is slidably connected to the lead screw part II1201. The bevel gear I is fixedly connected to the shaft part II1202. The two shaft parts III1203 are rotatably connected to the front bottom beam 1012 and the center bottom beam 1013 respectively through bearings. The front bottom beam 1012 is provided with holes for connecting the bearings and the shaft parts III1203. The center bottom beam 1013 is provided with holes for connecting the bearings and the shaft parts III1203.

[0043] Screw I 19 includes screw part 1901, shaft part IV 1902 and shaft part V 1903. Screw part 1901, shaft part IV 1902 and shaft part V 1903 are all coaxial. Shaft part V 1903 is located at the front end of screw part 1901 and shaft part IV 1902 is located at the rear end of screw part 1901. Shaft part V 1903 is fixedly connected to the output shaft of motor III 20 through a coupling. Shaft part IV 1902 is rotatably connected to rear connecting plate 23 through a bearing. Rear connecting plate 23 has a hole for connecting bearing and shaft part IV 1902.

[0044] The use of bearings also requires consideration of setting steps or shaft end retaining rings on the shaft, that is, setting steps or bearing caps in the shaft hole. Since the use of bearings and bearing accessories is a common technical means in this field, it will not be described in detail here.

[0045] A screw rod II 2102 is provided on the top surface of the sliding plate II 21, and a plug hole 2201 is provided on the counterweight 22. The plug hole 2201 is connected to the screw rod II 2102. There are multiple counterweights 22, which are stacked on the top surface of the sliding plate II 21. The plug holes 2201 of the multiple counterweights 22 are all connected to the screw rod II 2102.

[0046] The screw II 2102 and the insertion hole 2201 facilitate the installation of the counterweight 22 and prevent the counterweight 22 from falling off accidentally.

[0047] Multiple counterweights 22 can be used flexibly during use.

[0048] A pulley 25 is rotatably connected to the rear connecting plate 23. A wheel groove 2301 is provided on the bottom surface of the rear connecting plate 23. A shaft groove 2302 is provided on the two parallel inner walls of the wheel groove 2301. The pulley 25 is located in the wheel groove 2301. The two ends of the shaft of the pulley 25 are engaged in the two shaft grooves 2302. Multiple wheel grooves 2301 are provided on the bottom surface of the rear connecting plate 23. A pulley 25 is connected in each of the multiple wheel grooves 2301.

[0049] The pulley 25 ensures that the rear connecting plate 23 moves smoothly.

[0050] Each of the two side strips 1011 has a limiting block I18 on its inner wall. The limiting block I18 is located in front of the central bottom beam 1013 and is close to the central bottom beam 1013. Each of the two side strips 1011 has a limiting block II26 on its inner wall. The limiting block II26 is located behind the central bottom beam 1013 and is close to the rear connecting plate 23. Each of the two columns 1022 has a limiting block III27 on its front side and is close to the bottom frame 101.

[0051] The limiting block I18 is designed to prevent the sliding plate I14 from sliding excessively towards the center bottom beam 1013, causing collisions between parts; the limiting block II26 is designed to prevent the sliding plate II21 from sliding excessively backward and disengaging from the edge strip 1011; the limiting block III27 is designed to prevent the material platform 4 from sliding excessively downward, causing collisions between the material platform 4 and other parts; it should be noted that the limiting block III27 should be set above the screw I19, and the height of the motor III20 should be taken into account to prevent the material platform 4 from colliding with the screw I19 or the motor III20.

[0052] To facilitate the movement of this utility model, casters can be installed on the bottom frame 101, or the utility model can be supported by another bracket with casters. Since the installation of casters or brackets are common technical means in the field, they will not be described in detail here. It should be noted that after the utility model is equipped with casters or brackets, it is necessary to ensure that the pulley 25 can slide stably on the bottom surface or bracket.

Claims

1. A hoisting device for construction work, characterized in that: The utility model relates to a kind of material lifting machines, including frame (1), rib (2), handle (3) and material table (4), drive assembly (5) and counterweight assembly (7), frame (1) includes bottom frame (101) and portal (102), bottom frame (101) includes edge strip (1011) and center bottom beam (1013), edge strip (1011) is equipped with two, two edge strips (1011) are parallel, center bottom beam (1013) is fixedly connected between two edge strips (1011), center bottom beam (1013) is perpendicular to two edge strips (1011), center bottom beam (1013) is located at the middle position of the length direction of edge strip (1011), portal (102) includes top beam (1021) and stand (1022), stand (1022) is equipped with two, two stands (1022) are parallel, top beam (1021) is fixedly connected at the top of two stands (1022), two stands (1022) and a top beam (1021) form "n", material table (4) includes vertical plate (401), bottom plate (402) and back side plate (403), bottom plate (402) is fixedly connected at the lower end of one side wall of vertical plate (401), bottom plate (402) is perpendicular to vertical plate (401), bottom plate (402) and vertical plate (401) form " " shape, back side plate (403) is equipped with two, two back side plates (403) are parallel, two back side plates (403) are fixedly connected in the side wall of vertical plate (401) away from bottom plate (402), two back side plates (403) are respectively slidably connected in the inner side of two stands (1022), rib (2) is equipped with two, each rib (2) is respectively obliquely connected between one stand (1022) and one edge strip (1011), handle (3) is fixedly connected at the back side of two stands (1022), drive assembly (5) includes screw rod I (8), motor I (9), connecting plate (10) and screw rod seat I (11), screw rod I (8) is arranged between two stands (1022), both ends of screw rod I (8) are rotatably connected in top beam (1021) and center bottom beam (1013), motor I (9) is fixedly connected on top beam (1021), the output shaft of motor I (9) is fixedly connected with screw rod I (8) through shaft coupling, connecting plate (10) is fixedly connected between two back side plates (403), connecting plate (10) is fixedly connected with vertical plate (401), connecting plate (10) is equipped with connecting hole I (1001) on it, screw rod seat I (11) is fixedly connected in connecting hole I (1001), screw rod seat I (11) is slidably connected on screw rod I (8), counterweight assembly (7) includes sliding plate II (21), sliding plate II (21) is arranged between two edge strips (1011), left and right side walls of sliding plate II (21) are slidably connected on the inner wall of two edge strips (1011) respectively, sliding plate II (21) is arranged at the back side of center bottom beam (1013), protruding block II (2103) is projected on the left and right side walls of sliding plate II (21) respectively,Two edge strips (1011) on the rear side of the center bottom beam (1013) are each provided with a sliding groove I (1015), two protrusions II (2103) are respectively connected in the sliding groove I (1015), and a counterweight (22) is connected to the top surface of the sliding plate II (21).

2. A hoisting device for use in construction according to claim 1, characterized in that: The telescopic assembly (6) comprises a screw rod II (12), a motor II (13), a sliding plate I (14), a screw rod base II (15), a bevel gear I (16) and a bevel gear II (17), the bottom frame (101) comprises a front bottom beam (1012) which is fixedly connected between the two edge strips (1011), the front bottom beam (1012) is perpendicular to the edge strip (1011), the front bottom beam (1012) is arranged at the front end of the edge strip (1011) in the length direction, the screw rod II (12) is rotatably connected to the front end of the front bottom beam (1012), the rear end of the screw rod II (12) is rotatably connected to the central bottom beam (1013), the sliding plate I (14) is connected between the two edge strips (1011), the sliding plate I (14) is arranged on the front side of the central bottom beam (1013), the left and right side walls of the sliding plate I (14) are slidably connected to the inner walls of the two edge strips (1011) respectively, the sliding plate I (14) is provided with a connecting hole II (1401), the screw rod base II (15) is fixedly connected to the connecting hole II (1401), the screw rod base II (15) is slidably connected to the screw rod II (12), the motor II (13) is fixedly connected to the side wall of the front bottom beam (1012) facing the central bottom beam (1013) through a support, the bevel gear II (17) is fixedly connected to the output shaft of the motor II (13), the bevel gear I (16) is fixedly connected to the screw rod II (12), the bevel gear I (16) is arranged close to the front bottom beam (1012), the bevel gear I (16) is engaged with the bevel gear II (17), the counterweight assembly (7) comprises a screw rod I (19) and a motor III (20), the motor III (20) is fixedly connected to the top surface of the sliding plate I (14), the front end of the screw rod I (19) is fixedly connected to the output shaft of the motor III (20) through a shaft coupling, the sliding plate II (21) is provided with a threaded hole (2101), and the threaded hole (2101) is slidably connected to the screw rod I (19).

3. A building construction hoist as claimed in claim 2 wherein: The telescopic assembly (6) comprises a rear connecting plate (23) and a sliding column (24), the sliding column (24) is provided with two, the two sliding columns (24) are parallel, the rear ends of the two sliding columns (24) are fixedly connected to the side walls of the rear connecting plate (23), the rear ends of the two edge strips (1011) are provided with inner holes (1014), the rear connecting plate (23) is arranged behind the two edge strips (1011), the two sliding columns (24) are slidably connected in the two inner holes (1014) respectively, and the rear end of the screw rod I (19) is rotatably connected to the rear connecting plate (23).

4. A building construction hoist according to claim 3, wherein: The side walls of the two stand columns (1022) are provided with sliding grooves II (1023), the sliding grooves II (1023) are arranged along the height direction of the stand column (1022), the outer walls of the two rear side plates (403) are provided with protrusions I (404), and the two protrusions I (404) are slidably connected in the two sliding grooves II (1023) respectively.

5. A building construction hoist according to any one of claims 1-4, characterized in that: The screw rod I (8) comprises a screw rod part I (801) and a shaft part I (802), the screw rod part I (801) and the shaft part I (802) are coaxial, the shaft part I (802) is provided with two, the two shaft parts I (802) are respectively arranged at the upper and lower ends of the screw rod part I (801), the screw rod seat I is slidably connected to the screw rod part I (801), the two shaft parts I (802) are respectively rotatably connected to the top beam (1021) and the center bottom beam (1013) through bearings, the top beam (1021) is provided with holes connecting the bearings and the shaft parts I (802), and the center bottom beam (1013) is provided with holes connecting the bearings and the shaft parts I (802).

6. A building construction hoist according to any one of claims 2-4, characterised in that: The screw rod II (12) comprises a screw rod part II (1201), a shaft part II (1202) and a shaft part III (1203), the screw rod part II (1201), the shaft part II (1202) and the shaft part III (1203) are coaxial, the shaft part II (1202) is arranged at the front end of the screw rod part II (1201), the shaft part III (1203) is provided with two, one of the two shaft parts III (1203) is arranged at the front end of the shaft part II (1202), the other of the two shaft parts III (1203) is arranged at the rear end of the screw rod part II (1201), the screw rod seat II (15) is slidably connected to the screw rod part II (1201), the bevel gear I is fixedly connected to the shaft part II (1202), the two shaft parts III (1203) are respectively rotatably connected to the front bottom beam (1012) and the center bottom beam (1013) through bearings, the front bottom beam (1012) is provided with holes connecting the bearings and the shaft parts III (1203), and the center bottom beam (1013) is provided with holes connecting the bearings and the shaft parts III (1203).

7. A building construction hoist according to any one of claims 2 to 4, wherein: The screw rod I (19) comprises a screw rod part (1901), a shaft part IV (1902) and a shaft part V (1903), the screw rod part (1901), the shaft part IV (1902) and the shaft part V (1903) are coaxial, the shaft part V (1903) is arranged at the front end of the screw rod part (1901), the shaft part IV (1902) is arranged at the rear end of the screw rod part (1901), the shaft part V (1903) is fixedly connected with the output shaft of the motor III (20) through a shaft coupling, the shaft part IV (1902) is rotatably connected with the rear connecting plate (23) through a bearing, and the rear connecting plate (23) is provided with holes connecting the bearing and the shaft part IV (1902).

8. A construction hoist according to any one of claims 1 to 4, wherein: The sliding plate II (21) is provided with the screw rod II (2102) on the top surface, the counterweight block (22) is provided with the insertion hole (2201), the insertion hole (2201) is connected to the screw rod II (2102), the counterweight block (22) is provided with a plurality of counterweight blocks (22), the plurality of counterweight blocks (22) are stacked on the top surface of the sliding plate II (21), and the insertion holes (2201) of the plurality of counterweight blocks (22) are connected to the screw rod II (2102).

9. The hoisting device for construction according to claim 3, characterized in that: The rear connecting plate (23) is rotationally connected with a pulley (25), the bottom surface of the rear connecting plate (23) is provided with a wheel groove (2301), the two parallel inner walls of the wheel groove (2301) are both provided with an axle slot (2302), the pulley (25) is arranged in the wheel groove (2301), the two ends of the shaft of the pulley (25) are clamped in the two axle slots (2302), the bottom surface of the rear connecting plate (23) is provided with a plurality of wheel grooves (2301), and the plurality of wheel grooves (2301) are all connected with the pulleys (25).

10. The hoisting device for construction according to claim 3, characterized in that: The inner walls of the two edge strips (1011) are both provided with limiting blocks I (18), the limiting blocks I (18) are arranged in front of the central bottom beam (1013) and close to the central bottom beam (1013); the inner walls of the two edge strips (1011) are both provided with limiting blocks II (26); the limiting blocks II (26) are arranged behind the central bottom beam (1013) and close to the rear connecting plate (23); and the two stand columns (1022) are both provided with limiting blocks III (27), the limiting blocks III (27) are arranged on the front sides of the stand columns (1022) and close to the bottom frame (101).

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