Lifting device for plant air pipe assembly

Abstract

The lifting device comprises a base, a traction mechanism and a pushing handle, a transverse table is fixedly arranged on the base, and an erecting structure is arranged on the outer side of a vertical frame and the outer side of a sliding table; a rotating handle is rotationally connected to the interior of the transverse table, and a transmission part is arranged on the transverse table; a shaft rod is rotationally connected into the base, extension structures are arranged at the two ends of the shaft rod, and pedals are rotationally connected into the grooves. According to the device, firstly, through the sliding arrangement of the sliding table and the design of the erecting structure, the device can be flexibly adjusted according to the length, the width and other sizes of the air pipe, the gravity center of the device can be better balanced through the design of dispersing the weight, the stability of the device is enhanced, and the safety of the air pipe assembly process is ensured; through operations such as rotation of the rotating handle and the rotating shaft, treading of the pedal and the like, actions such as locking, releasing and transverse movement of the sliding table can be achieved, the operation time is shortened through the quick release mechanism, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of air duct assembly equipment, and in particular to a lifting device for assembling air ducts in a factory building. Background Art

[0002] Duct installation is a very important part of mechanical and electrical installation engineering, which is usually located on the top of the basement or garage of the building structure. Due to the height limitation of the building structure, large lifting equipment cannot enter and set up, so large-scale operations cannot be carried out.

[0003] The traditional way of installing air ducts requires lifting the air ducts to a certain height, usually using a combination of scaffolding and manual lifting. This method has low construction efficiency, requires a large number of construction workers, and has safety hazards. In the prior art, the air ducts are lifted to the required height by using a trolley frame in conjunction with a lifting bracket, and the lifting drive assembly on the lifting bracket. This allows the ducts to be operated in a small space, avoiding the problem of large lifting equipment being unable to be set up, and avoiding manual lifting. It has the advantages of simple and convenient operation and high installation efficiency.

[0004] In order to ensure the balance and stability of the air duct when it is lifted, it is necessary to place the air duct in the center. However, since the support range of the existing lifting bracket is difficult to adjust, when facing the installation of a longer air duct, the bottom of both ends of the longer air duct cannot be lifted and is in a suspended state, which will cause uneven force on the air duct and increase the risk of deformation and damage of the air duct. At the same time, if the two ends of the air duct are not effectively supported during the lifting process, the air duct will swing, affecting the stability and safety of the construction. Especially for horizontally suspended trunk air ducts or system air ducts with a length of more than 20m, the problem of air duct swing will be more serious. The existing technology uses additional measures to ensure the stability of the air duct, such as fixing with inclined steel wire ropes, which not only increases the complexity of construction, but also increases construction costs and safety risks.

[0005] In view of the above-mentioned defects, a lifting device for assembling air ducts in a factory is provided. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned problem and to provide a lifting device for assembling factory air ducts.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a lifting device for assembling air ducts in a factory building, comprising a base, a traction mechanism and a push handle installed on the base, a horizontal platform is fixedly provided on the base, a vertical frame is fixedly provided on the upper end of the horizontal platform, slides are slidably provided on both sides of the base, a mounting structure used in conjunction with the air duct is provided on the outer sides of the vertical frame and the slide, and the free end of the traction mechanism is connected to the mounting structure to control the vertical movement of the mounting structure; The interior of the horizontal platform is rotatably connected with a handle and a rotating shaft coaxially fixed with the handle. A transmission member is arranged on the horizontal platform. When the rotating shaft rotates, the two slides move laterally relative to the base under the action of the transmission member. An axle is rotatably connected to the base, and extension structures are provided at both ends of the axle. Baffles are fixed on the axle and the extension structure. A fan-shaped groove matched with the baffle is formed through the slide. When the baffle and the fan-shaped groove are staggered, the slide can be restricted from moving freely relative to the base. A groove is formed in the base, and a pedal is rotatably connected to the groove. A linkage is provided in the base. When the pedal rotates, the axle rotates under the action of the linkage.

[0008] Preferably, the transmission member includes a transmission arm rotatably connected to the horizontal platform, and a component driving the transmission arm to rotate, retract and extend, and the free end of the transmission arm is rotatably connected to the side end of the slide.

[0009] Preferably, the component that drives the transmission arm to rotate and retract includes a frame rod slidably connected to the horizontal platform, and a joint that drives the frame rod to move horizontally. An open groove that cooperates with the sliding of the frame rod is formed in the horizontal platform, and a sliding sleeve is provided on the outer sliding sleeve of the frame rod, and the sliding sleeve is rotatably connected to the transmission arm.

[0010] Preferably, the assembly driving the frame rod to move horizontally includes a rotating shaft rotatably connected to the horizontal platform, the frame rod is slidably sleeved on the outside of the rotating shaft, a protrusion is formed on the inner wall of the frame rod, and a slide rail is formed on the side wall of the rotating shaft to cooperate with the protrusion to slide, and the slide rail is a spiral structure.

[0011] Preferably, the extension structure includes a bolt screwed together with the end of the shaft, the outer side of the bolt is rotatably connected to a rotary rod, a plurality of baffles are equidistantly distributed on the outer side of the rotary rod, and the spacing between two adjacent baffles is adapted to the width of the slide.

[0012] Preferably, a recess is formed in the rotating rod for the end of the matching bolt to be embedded. When the rotating rod is rotated to be distributed in the same straight line as the shaft rod, the rotating rod and the end of the shaft rod are tightly attached by tightening the bolt. At this time, the baffles on the rotating rod and the shaft rod are aligned.

[0013] Preferably, a clamping block is fixedly provided at the side end of the slide, and a clamping groove for engaging with the rotating rod is formed in the clamping block, and the end of the clamping groove is in a trumpet-shaped structure.

[0014] Preferably, the linkage includes a rack slidably connected to the base, and a component that drives the rack to move. The outer end of the shaft is coaxially fixed with a gear that meshes with the rack. A sliding groove that cooperates with the sliding of the rack is formed in the base, and a cross bar is fixed in the sliding groove. The rack is slidably sleeved on the outside of the cross bar.

[0015] Preferably, the component driving the rack to move includes a support arm rotatably connected between the pedal and the rack, and a compression spring for compressing the shaft rod is sleeved on the outer side of the crossbar.

[0016] Preferably, the mounting structure includes a slide plate slidably connected to the outside of the vertical frame, the outside of the slide is slidably connected to a side frame, the side end of the side frame is fixed with an insertion rod that slides into the slide plate, and the outer ends of the slide plate and the side frame are fixed with support arms that cooperate with the air duct mounting.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this application, through the sliding setting of the slide and the design of the mounting structure, the device can be flexibly adjusted according to the length, width and other dimensions of the air duct to meet the assembly requirements of air ducts of different specifications. When facing the installation of long air ducts, the slide disperses the weight of the air duct to both sides of the base instead of concentrating it on a certain point of the base. This weight-dispersing design can better balance the center of gravity of the device and prevent the device from tilting or tipping over due to the excessive weight of the air duct, thereby enhancing the stability of the device and ensuring the safety of the air duct assembly process.

[0018] 2. In the present application, the user only needs to step on the pedal first to align the baffle with the fan-shaped groove, and then operate the handle with both hands to control the opening angle of the slide relative to the base. By rotating the handle and the swivel shaft, stepping on the pedal and other operations, the slide can be locked and released, moved laterally and other actions. This quick release mechanism avoids the tedious steps of manually unlocking the slide, shortens the operation time and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the front three-dimensional structure of a lifting device provided in an embodiment of the present invention is shown; Figure 2 A schematic diagram of the rear three-dimensional structure of a lifting device provided in an embodiment of the present invention is shown; Figure 3 A schematic diagram of the front cross-section structure of a base provided according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of a side cross-sectional structure of a base provided according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the matching structure of a rack rod and a rotating shaft according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the matching structure of the shaft rod and the rotating rod provided according to an embodiment of the present invention is shown.

[0020] Legend: 1. Base; 101. Slide; 102. Groove; 2. Cross table; 201. Open groove; 3. Vertical frame; 4. Slide; 401. Fan-shaped groove; 5. Slide plate; 6. Side frame; 7. Insert rod; 8. Support arm; 9. Axle rod; 10. Bolt; 11. Rotary rod; 12. Baffle; 13. Gear; 14. Cross bar; 15. Rack; 16. Compression spring; 17. Foot pedal; 18. Support arm; 19. Transmission arm; 20. Sliding sleeve; 21. Frame rod; 22. Rotary shaft; 23. Slide rail; 24. Protrusion; 25. Rotary handle; 26. Block; 27. Traction mechanism; 28. Push handle. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-6 The present invention provides a technical solution: a lifting device for assembling factory air ducts, comprising a base 1, and a traction mechanism 27 and a push handle 28 installed on the base 1, a horizontal platform 2 is fixedly provided on the base 1, a vertical frame 3 is fixedly provided on the upper end of the horizontal platform 2, slides 4 are slidably provided on both sides of the base 1, and a mounting structure used in conjunction with the air duct is provided on the outer sides of the vertical frame 3 and the slide 4, and the free end of the traction mechanism 27 is connected to the mounting structure to control the vertical movement of the mounting structure.

[0023] As the supporting foundation of the whole device, the traction mechanism 27 is installed on the base 1, and its free end is connected to the rack structure. The vertical movement of the rack structure is controlled by traction, so as to achieve the lifting and lowering of the air duct. The push handle 28 is installed on the base 1, which is convenient for the operator to push the whole device to move and improve the flexibility of the device. The slide 4 is slidably arranged on both sides of the base 1, and can be adjusted according to the size of the air duct and installation requirements, increasing the adaptability and flexibility of the device. The rack structure is arranged on the outside of the stand 3 and the slide 4, and is used to place and fix the air duct, and is connected to the traction mechanism 27 to achieve the lifting and lowering of the air duct.

[0024] The traction mechanism 27 is a prior art, mainly composed of a pull rope, a pulley system, a winch and a guide wheel, etc. When the winch rotates, the pull rope is wound or released. When the pull rope is wound, the object is lifted, and when the pull rope is released, the object is lowered.

[0025] Through the sliding setting of the slide 4 and the design of the mounting structure, the device can be adjusted according to the length of the air duct, so that the device can adapt to air ducts of different specifications, increasing the scope of application of the device. For a wider air duct, the slide 4 can be slid outward to accommodate the width of the air duct, and for a narrower air duct, the slide 4 can be slid inward to save space.

[0026] When installing a long air duct, the slide 4 distributes the weight of the air duct to both sides of the base 1 instead of concentrating it on a certain point of the base 1, which can better balance the center of gravity of the device and enhance the stability of the device. When lifting the air duct, the slide 4 can provide additional support to prevent the device from tilting or tipping due to the excessive weight of the air duct, and can enhance the device's ability to resist lateral forces and prevent the air duct from shifting or being damaged during the lifting or installation process.

[0027] The horizontal platform 2 is internally rotatably connected with a handle 25 and a rotating shaft 22 coaxially fixed with the handle 25. A transmission member is provided on the horizontal platform 2. When the rotating shaft 22 rotates, the two slides 4 move laterally relative to the base 1 under the action of the transmission member.

[0028] The knob 25 and the shaft 22 are coaxially fixed, which means that the rotation of the knob 25 will directly drive the rotation of the shaft 22. This design allows the operator to control the rotation of the shaft 22 by rotating the knob 25, so that the two slides 4 can adjust the distance between the base 1 under the action of the transmission member. The design of the knob 25 is also convenient for the operator to apply the rotation force, which improves the convenience of operation. By rotating the knob 25 and the shaft 22, the lateral movement distance of the slide 4 can be accurately controlled. The operator can flexibly adjust the position of the slide 4 according to the size and installation requirements of the air duct, so that the air duct can be accurately placed in the desired position, improving the accuracy and efficiency of the air duct installation.

[0029] An axle rod 9 is rotatably connected to the base 1, and extension structures are provided at both ends of the axle rod 9. Baffles 12 are fixedly provided on the axle rod 9 and the extension structure. A fan-shaped groove 401 adapted to the baffle 12 is formed through the slide 4. When the baffle 12 is staggered from the fan-shaped groove 401, the slide 4 can be restricted from moving freely relative to the base 1. A groove 102 is formed in the base 1, and a pedal 17 is rotatably connected to the groove 102. A linkage is provided in the base 1. When the pedal 17 rotates, the axle rod 9 rotates under the action of the linkage.

[0030] The shaft 9 is rotatably connected in the base 1, and the extension structures at both ends are used to increase the length of the shaft 9 and provide additional support and connection points for the lateral movement of the slide 4. The baffle 12 is fixed on the shaft 9 and the extension structure, and the fan-shaped groove 401 formed through the slide 4 is adapted to the baffle 12. When the baffle 12 is staggered from the fan-shaped groove 401, the baffle 12 will resist the outside of the slide 4, limiting the movement of the slide 4 relative to the base 1, and playing the role of locking the slide 4. When the baffle 12 is aligned with the fan-shaped groove 401, the slide 4 can move laterally relative to the base 1 to achieve the release of the slide 4.

[0031] The pedal 17 is rotatably connected in the groove 102 of the base 1, and the operator can apply force by stepping on or rotating the pedal 17. The linkage in the base 1 transmits the rotational movement of the pedal 17 to the shaft 9, so that the shaft 9 rotates under the drive of the pedal 17. By rotating the pedal 17, the rotation of the shaft 9 can be controlled, and then the relative position of the baffle 12 and the fan-shaped groove 401 can be changed to achieve the locking and release of the slide 4. When the slide 4 needs to be fixed, the pedal 17 is released to make the baffle 12 staggered from the fan-shaped groove 401, and the slide 4 is locked; when the slide 4 needs to be moved, the pedal 17 is stepped on to align the baffle 12 with the fan-shaped groove 401, and the slide 4 is released and moved. This design makes the fixing and movement of the slide 4 more flexible and controllable, simplifies the operation process, and improves the convenience of construction.

[0032] During operation, the user only needs to step on the pedal 17 to align the baffle 12 with the fan-shaped groove 401, and then control the opening angle of the slide 4 relative to the base 1 by operating the handle 25 with both hands. This quick release mechanism avoids the tedious steps of manually unlocking the slide 4, shortens the operation time, and improves construction efficiency.

[0033] Specifically, Figure 3 and Figure 5 As shown, the transmission member includes a transmission arm 19 rotatably connected to the horizontal platform 2, and a component driving the transmission arm 19 to rotate and expand. The free end of the transmission arm 19 is rotatably connected to the side end of the slide 4; the transmission arm 19 is rotatably connected by two arm rods of equal length. When the transmission arm 19 is rotated to open, the slide 4 will move laterally away from the base 1, and when the transmission arm 19 is rotated to fold, the slide 4 will move laterally close to the base 1.

[0034] The components for driving the transmission arm 19 to rotate and retract include a frame rod 21 slidably connected to the horizontal platform 2, and a fitting for driving the frame rod 21 to move horizontally. An open groove 201 for sliding with the frame rod 21 is formed in the horizontal platform 2. A sliding sleeve 20 is provided on the outer sliding sleeve of the frame rod 21. The sliding sleeve 20 is rotatably connected to the transmission arm 19. The sliding sleeve 20 is rotatably connected to the side end of the transmission arm 19. When the frame rod 21 moves horizontally, the sliding sleeve 20 arranged on the outside of the frame rod 21 will drive the transmission arm 19 to rotate along the horizontal platform 2. During this process, the sliding sleeve 20 will slide along the outside of the frame rod 21.

[0035] The parts driving the frame rod 21 to move horizontally include a rotating shaft 22 rotatably connected to the horizontal platform 2. The frame rod 21 is slidably sleeved on the outer side of the rotating shaft 22. The inner wall of the frame rod 21 is formed with a protrusion 24. The side wall of the rotating shaft 22 is formed with a slide rail 23 that cooperates with the protrusion 24 to slide. The slide rail 23 is a spiral structure.

[0036] When the swivel 22 rotates, the slide rail 23 acts on the side wall of the protrusion 24 through its spiral inner wall, driving the rack rod 21 fixed to the protrusion 24 to slide along the open groove 201. Through the rotation of the swivel 22 and the design of the spiral slide rail 23, the rotational motion of the swivel 22 can be efficiently converted into the horizontal linear motion of the rack rod 21. This motion conversion method is simple and effective, and can achieve precise control of the rack rod 21. The design of the swivel 22 and the spiral slide rail 23 makes the transmission system compact, occupies a small space, and is easy to install and arrange. This compact design also helps to improve the stability of the entire device.

[0037] Specifically, Figure 1-Figure 3 As shown, the extension structure includes a bolt 10 screwed together with the end of the shaft 9, the outer side of the bolt 10 is rotatably connected to a rotary rod 11, a plurality of baffles 12 are evenly distributed on the outer side of the rotary rod 11, and the spacing between two adjacent baffles 12 is adapted to the width of the slide 4; this design enables the baffle 12 to fit tightly with the side end of the slide 4, thereby limiting the movement of the slide 4.

[0038] A recess is formed in the rotating rod 11 for the end of the matching bolt 10 to be embedded. When the rotating rod 11 rotates to be distributed in the same straight line as the shaft rod 9, the rotating rod 11 is tightly attached to the end of the shaft rod 9 by tightening the bolt 10. At this time, the baffle 12 on the rotating rod 11 and the shaft rod 9 is aligned.

[0039] By screwing in the bolt 10, the position of the swivel rod 11 relative to the shaft rod 9 can be flexibly adjusted. When the swivel rod 11 is separated from the end of the shaft rod 9, the swivel rod 11 can be rotated. When the swivel rod 11 is rotated to a vertical state, the overall width of the device can be reduced, thereby facilitating users to move the device as a whole in a narrow factory building.

[0040] When the rotating rod 11 rotates and is coaxially distributed with the shaft 9, the ends of the shaft 9 and the rotating rod 11 are tightly attached by screwing the bolt 10, thereby limiting the random rotation of the rotating rod 11. The screwing of the bolt 10 allows the ends of the shaft 9 and the rotating rod 11 to be tightly attached, and this close contact limits the random rotation of the rotating rod 11, thereby preventing the baffle 12 from being misplaced due to the accidental rotation of the rotating rod 11, thereby improving the stability of the entire device.

[0041] A clamping block 26 is fixedly provided at the side end of the slide 4. A clamping slot is formed in the clamping block 26 to fit the rotating rod 11. The end of the clamping slot is in a trumpet-shaped structure. The end of the clamping slot is in a trumpet-shaped structure. This design facilitates the insertion and positioning of the rotating rod 11. The trumpet-shaped structure can guide the rotating rod 11 to enter the clamping slot smoothly, reducing the difficulty of alignment during installation. The design of the clamping block 26 and the clamping slot makes the installation and removal of the rotating rod 11 very simple. The operator can easily complete the fixing and release of the rotating rod 11, reducing the difficulty of operation.

[0042] Specifically, Figure 2-Figure 4 As shown, the linkage includes a rack 15 slidably connected to the base 1, and a component driving the rack 15 to move. The outer end of the shaft 9 is coaxially fixed with a gear 13 meshing with the rack 15. The base 1 is formed with a slide groove 101 for sliding with the rack 15. The slide groove 101 is fixed with a cross bar 14, and the rack 15 is slidably sleeved on the outer side of the cross bar 14. The rack 15 is slidably connected to the base 1 and meshes with the gear 13 coaxially fixed to the outer end of the shaft 9. This meshing relationship enables the movement of the rack 15 to directly drive the rotation of the shaft 9.

[0043] The components driving the rack 15 to move include a support arm 18 rotatably connected between the pedal 17 and the rack 15, and a compression spring 16 for compressing the shaft 9 is sleeved on the outer side of the cross bar 14. The support arm 18 is rotatably connected between the pedal 17 and the rack 15. When the pedal 17 rotates, the support arm 18 drives the rack 15 to move. The compression spring 16 is sleeved on the outer side of the cross bar 14 to compress the shaft 9. When the user releases the pedal 17, the rack 15 is reset under the action of the compression spring 16, so that the pedal 17 is rotated and lifted under the action of the support arm 18.

[0044] When in use, the operator steps on the pedal 17 with his foot to apply downward pressure. The rotating connection design of the pedal 17 enables the stepping action to drive the pedal 17 to rotate around its connection point. The rotation of the pedal 17 is transmitted to the rack 15 through the support arm 18, so that the rack 15 slides and moves along the outer side of the cross bar 14 in the slide groove 101. The movement of the rack 15 will mesh with the gear 13 coaxially fixed at the outer end of the shaft 9. The meshing relationship between the gear 13 and the rack 15 converts the linear motion of the rack 15 into the rotational motion of the gear 13, thereby driving the shaft 9 to rotate. During the movement of the rack 15, the compression spring 16 sleeved on the outer side of the cross bar 14 will be compressed. The elastic deformation of the compression spring 16 stores energy, providing power for subsequent resetting. After completing the required operation, the operator releases the pedal 17. At this time, the compression spring 16 releases the stored energy, pushing the rack 15 to move in the opposite direction and return to the initial position, while driving the gear 13 and the shaft 9 to return to their original positions.

[0045] Specifically, Figure 1-Figure 3 As shown, the mounting structure includes a slide plate 5 slidably connected to the outside of the vertical frame 3, and the outside of the slide 4 is slidably connected to the side frame 6. The side end of the side frame 6 is fixedly provided with an insertion rod 7 that slides into the slide plate 5, and the outer ends of the slide plate 5 and the side frame 6 are fixedly provided with a support arm 8 that cooperates with the air duct mounting.

[0046] The slide plate 5 is slidably connected to the outside of the stand 3. This design allows the slide plate 5 to move up and down according to the height of the air duct and the installation requirements, and to be adjusted to a suitable position to support the air duct. When the side frame 6 moves, the insertion rod 7 slides in the slide plate 5. This design forms a linkage relationship between the side frame 6 and the slide plate 5, so that when the slide plate 5 moves vertically, the side frame 6 is driven to move synchronously by the insertion rod 7, thereby achieving stable support for the air duct. The side frame 6 is slidably connected to the outside of the slide 4. This design allows the side frame 6 to move according to the length and installation position of the air duct, so as to better cooperate with the slide plate 5 to support the air duct. The outer ends of the slide plate 5 and the side frame 6 are fixed with a support arm 8 that cooperates with the air duct frame. The support arm 8 is designed to directly support the air duct and provide stable bearing capacity.

[0047] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting device for assembling a factory air duct, comprising a base (1), and a traction mechanism (27) and a push handle (28) mounted on the base (1), characterized in that: A horizontal platform (2) is fixedly provided on the base (1), a vertical frame (3) is fixedly provided on the upper end of the horizontal platform (2), slides (4) are slidably provided on both sides of the base (1), a mounting structure used in conjunction with an air duct is provided on the outer sides of the vertical frame (3) and the slide (4), and a free end of the traction mechanism (27) is connected to the mounting structure to control the vertical movement of the mounting structure; The horizontal platform (2) is internally rotatably connected to a handle (25) and a rotating shaft (22) coaxially fixed to the handle (25); a transmission member is provided on the horizontal platform (2); when the rotating shaft (22) rotates, the two slides (4) move laterally relative to the base (1) under the action of the transmission member; A shaft (9) is rotatably connected to the base (1), and both ends of the shaft (9) are provided with extension structures. A baffle (12) is fixedly provided on the shaft (9) and the extension structure. A fan-shaped groove (401) adapted to the baffle (12) is formed through the slide (4). When the baffle (12) and the fan-shaped groove (401) are staggered, the slide (4) can be restricted from moving freely relative to the base (1). A groove (102) is formed in the base (1), and a pedal (17) is rotatably connected to the groove (102). A linkage member is provided in the base (1), and when the pedal (17) rotates, the shaft (9) rotates under the action of the linkage member.

2. A lifting device for factory air duct assembly according to claim 1, characterized in that: The transmission member comprises a transmission arm (19) rotatably connected to the horizontal platform (2), and a component driving the transmission arm (19) to rotate and retract, and the free end of the transmission arm (19) is rotatably connected to the side end of the slide table (4).

3. A lifting device for factory air duct assembly according to claim 2, characterized in that: The component driving the transmission arm (19) to rotate and retract comprises a frame rod (21) slidably connected to the horizontal platform (2), and a fitting driving the frame rod (21) to move horizontally. An open groove (201) cooperating with the frame rod (21) to slide is formed in the horizontal platform (2). A sliding sleeve (20) is provided on the outer sliding sleeve of the frame rod (21). The sliding sleeve (20) is rotatably connected to the transmission arm (19).

4. A lifting device for factory air duct assembly according to claim 3, characterized in that: The assembly driving the frame rod (21) to move horizontally comprises a rotating shaft (22) rotatably connected to the horizontal platform (2); the frame rod (21) is slidably sleeved on the outer side of the rotating shaft (22); a protrusion (24) is formed on the inner wall of the frame rod (21); a slide rail (23) cooperating with the protrusion (24) to slide is formed on the side wall of the rotating shaft (22); and the slide rail (23) is a spiral structure.

5. The lifting device for factory air duct assembly according to claim 1 is characterized in that: The elongated structure comprises a bolt (10) screwed together with the end of the shaft (9), the outer side of the bolt (10) is rotatably connected to a rotary rod (11), a plurality of baffles (12) are equidistantly distributed on the outer side of the rotary rod (11), and the spacing between two adjacent baffles (12) is adapted to the width of the slide (4).

6. A lifting device for factory air duct assembly according to claim 5, characterized in that: The rotating rod (11) is formed with a recess into which the end of the matching bolt (10) is embedded. When the rotating rod (11) is rotated to be colinear with the shaft rod (9), the bolt (10) is tightened so that the rotating rod (11) and the end of the shaft rod (9) are in close contact. At this time, the baffles (12) on the rotating rod (11) and the shaft rod (9) are aligned.

7. The lifting device for factory air duct assembly according to claim 5, characterized in that: A clamping block (26) is fixedly provided at the side end of the slide table (4), and a clamping groove for engaging with the rotating rod (11) is formed in the clamping block (26), and the end of the clamping groove is in a trumpet-shaped structure.

8. The lifting device for factory air duct assembly according to claim 1, characterized in that: The linkage comprises a rack (15) slidably connected to the base (1), and a component for driving the rack (15) to move; a gear (13) meshing with the rack (15) is coaxially fixed to the outer end of the shaft (9); a slide groove (101) cooperating with the sliding of the rack (15) is formed in the base (1); a cross bar (14) is fixed in the slide groove (101); and the rack (15) is slidably sleeved on the outer side of the cross bar (14).

9. A lifting device for factory air duct assembly according to claim 8, characterized in that: The component driving the rack (15) to move comprises a support arm (18) rotatably connected between the pedal (17) and the rack (15), and a compression spring (16) for pressing the shaft rod (9) is sleeved on the outer side of the crossbar (14).

10. The lifting device for factory air duct assembly according to claim 1, characterized in that: The mounting structure comprises a slide plate (5) slidably connected to the outside of the vertical frame (3); the outside of the slide platform (4) is slidably connected to a side frame (6); the side end of the side frame (6) is fixedly provided with an insertion rod (7) that slides and penetrates the slide plate (5); and the outer ends of the slide plate (5) and the side frame (6) are both fixedly provided with a supporting arm (8) that cooperates with the air duct mounting.

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