Jacking device

Abstract

The utility model discloses a jacking device which comprises a balance connecting rod, two symmetrically-arranged supporting frames and two lifting driving pieces. The balance connecting rod is horizontally arranged, and the two ends of the balance connecting rod are detachably connected to the two supporting frames so as to balance the two supporting frames. The two lifting driving pieces are in transmission connection with the two supporting frames correspondingly, and the two supporting frames are detachably connected to the two sides of the equipment to be jacked correspondingly. According to the utility model, the two support frames are balanced left and right and synchronously lifted, so that the balance and stability of equipment to be jacked in the lifting process are ensured, the subsequent operation is facilitated, the horizontal tension is effectively balanced, and the structural damage of the equipment is effectively avoided; in addition, the jacking device is compact in structure and convenient to mount, dismount and operate, so that the efficiency and safety of jacking operation are effectively improved, and the labor intensity of workers is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of jacking devices, in particular to a jacking device. Background Art

[0002] During the tobacco shred production process, storage cabinets are required to thoroughly mix processed tobacco leaves, cut tobacco, and other products, and then store them for a specified period of time according to production process requirements. These cabinets are typically constructed from steel and consist of a distribution cart, the cabinet body, and a discharge conveyor. Currently, the storage cabinets used in tobacco shred production plants are large and heavy, with individual weights reaching up to 13,000 kg, and the distribution cart weighing over 3,000 kg. The distribution cart is mounted longitudinally on top of the cabinet body. A reduction motor drives 4-10 sets of running wheels, which reciprocate along tracks on either side of the cabinet body. The wheels on either side of the distribution cart are connected by a wheel drive shaft (hereinafter referred to as the running axle), which is fixed to the bottom of the distribution cart via seated bearings, providing support for the distribution cart. After prolonged operation, moving components such as the wheels, bearings, and axles can fail due to wear and fatigue, necessitating replacement and repair.

[0003] Because the storage cabinet tracks and the side frames of the fabric cart are not coplanar in either the vertical or horizontal directions, the typical method for jacking up the fabric cart for maintenance is for multiple maintenance personnel to use crowbars, using the tracks as a support point to first lift the part of the fabric cart that needs repair, so that the inner edge of the wheel is above the storage cabinet tracks. Then, multiple wooden planks are placed across the tracks on both sides to provide stable support for the cart, and finally the damaged parts are disassembled and repaired. However, due to the heavy weight of the fabric cart, the high ground height of the storage cabinet tracks, the narrow space between the storage cabinets, and the lack of corresponding maintenance platforms on most fabric carts, manual jacking of the fabric cart is usually required during maintenance. This is not only difficult, labor-intensive, and inefficient, but also poses significant safety risks.

[0004] To this end, in recent years, many researchers have designed specialized lifting devices for storage cabinets and fabric cranes in the tobacco silk industry. These devices, employing diverse structural designs and lifting methods, have gradually replaced the traditional manual lifting method of fabric cranes, which suffers from low maintenance efficiency, inconvenience, and high risks. However, while existing lifting devices can achieve this lifting function, they still suffer from structural and technical flaws, potentially causing damage to the storage cabinets, fabric cranes, and other components, ultimately impacting the normal operation of the equipment. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects of the prior art jacking method, such as high difficulty, low efficiency, poor safety, high labor intensity and easy damage to equipment, and to provide a jacking device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An embodiment of the present utility model provides a jacking device, comprising: a balancing connecting rod, two symmetrically arranged support frames and two lifting drive components; the balancing connecting rod is horizontally arranged, and both ends are detachably connected to the two support frames to balance the two support frames; the two lifting drive components are respectively transmission-connected to the two support frames, and the two support frames are respectively detachably connected to the two sides of the equipment to be jacked.

[0008] In one embodiment, the support frame includes a transmission plate, a first connecting plate and a support plate; the transmission plate is horizontally arranged and connected to the side of the first connecting plate close to the lifting drive member, and the lifting drive member is transmission-connected to the transmission plate; the support plate is parallel to the transmission plate and connected to the side of the first connecting plate close to the equipment to be lifted, and the support plate is supported by the equipment to be lifted.

[0009] In one embodiment, the support frame further includes a second connecting plate connected to a side of the support plate away from the first connecting plate, and the balancing link is detachably connected to the second connecting plate.

[0010] In one embodiment, side plates are provided on both sides of the equipment to be lifted, the first connecting plate and the second connecting plate are both vertically arranged, and the upper ends of the first connecting plate and the second connecting plate are both higher than the support plate, so that a positioning groove is formed between the first connecting plate, the support plate and the second connecting plate, and the side plate is placed in the positioning groove.

[0011] In one embodiment, the first connecting plate is detachably connected to a limiting assembly, and the limiting assembly is located above the positioning groove; when the supporting plate supports the side plate, the side plate is limited between the limiting assembly and the positioning groove.

[0012] In one embodiment, the limiting assembly includes a bolt and a first nut. A through hole is provided on the first connecting plate. The bolt extends into the through hole and is threadedly connected to the first nut. The bolt abuts against the upper surface of the side plate.

[0013] In one embodiment, the through hole is in an oblong shape, and the bolt moves up and down in the through hole.

[0014] In one embodiment, the transmission plate, the first connecting plate and the support plate are connected in sequence and form a Z shape, the transmission plate is arranged higher than the support plate, and the lifting drive member is located below the transmission plate.

[0015] In one embodiment, the balancing link is a screw rod, and the screw rod is detachably connected to the second connecting plate via a second nut.

[0016] In one embodiment, the lifting drive component is a hydraulic jack.

[0017] The jacking device of the present invention has the following advantages compared with the prior art: by adopting a balancing connecting rod to connect the two support frames, the two support frames are balanced on the left and right, and two lifting drive members are used to drive the two support frames to rise and fall synchronously, thereby ensuring the balance and stability of the equipment to be lifted during the lifting process, thereby facilitating subsequent work, and effectively balancing the horizontal pulling force, thereby effectively avoiding structural damage to the equipment; in addition, the jacking device has a compact structure and is easy to install, disassemble and operate, thereby effectively improving the jacking efficiency and safety of the equipment to be lifted, and greatly reducing the labor intensity of the staff.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A schematic diagram of an application scenario of the jacking device provided by the utility model;

[0021] Figure 2 A schematic structural diagram of the jacking device provided by the utility model;

[0022] Figure 3 This is a structural schematic diagram of the support frame provided by the utility model.

[0023] Reference numerals

[0024] 11. Balancing link; 12. Support frame; 121. Transmission plate; 122. Support plate; 123. First connecting plate; 1231. Through hole; 124. Second connecting plate; 13. Lifting drive member; 14. Limiting assembly; 141. Bolt; 142. First nut; 15. Second nut; 20. Travel track; 30. Side panel. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] 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 embodiments described 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0032] See also Figures 1 to 3 As shown, the utility model discloses a specific embodiment of a jacking device, including: a balancing link 11, two symmetrically arranged support frames 12 and two lifting drive members 13; the balancing link 11 is horizontally arranged, and both ends are detachably connected to the two support frames 12 to balance the two support frames 12; the two lifting drive members 13 are respectively transmission-connected to the two support frames 12, and the two support frames 12 are respectively detachably connected to the two sides of the equipment to be jacked.

[0033] Specifically, the lifting device in this embodiment is specifically used to lift the fabric trolley. When using the lifting device in this embodiment to lift the fabric trolley, the two support frames 12 are first respectively extended into the gap between the traveling track 20 and the fabric trolley, so that the support frames 12 connect and support the bottom edge of the fabric trolley. The two support frames 12 are then connected and pre-tightened using the balancing link 11 to ensure that the two support frames 12 always maintain balance. Subsequently, the two lifting drive members 13 are respectively placed on the storage cabinet traveling track 20 directly below the two support frames 12, and the two lifting drive members 13 are respectively connected to the two support frames 12. The two lifting drive members 13 then drive the two support frames 12 to rise synchronously, so that both sides of the fabric trolley are lifted synchronously, thereby facilitating subsequent operations such as maintenance on the fabric trolley. After the subsequent operations are completed, the two support frames 12 are driven to descend synchronously through the two lifting drive members 13 to smoothly lower the fabric trolley. Then the lifting drive members 13 are removed, the balancing link 11 is disassembled, and finally the support frame 12 is removed, so that the fabric trolley can return to normal production work.

[0034] The lifting device in this embodiment connects and balances two support frames 12 through a balancing link 11. The support frames 12 connect and support the fabric trolley, effectively balancing the horizontal force component of the support frames 12 on the fabric trolley, so that the support frames 12 only generate vertical lifting force on the fabric trolley. At the same time, the two lifting drive members 13 synchronously drive the two support frames 12 to rise and fall, ensuring that the lifting drive members 13 only generate vertical pressure on the traveling track 20, thereby avoiding damage to the fabric trolley and preventing the traveling track 20 from bending or deformation. It also achieves smooth lifting and lowering of the fabric trolley, effectively avoiding the tedious and dangerous manual use of tools such as crowbars, and facilitating multiple workers to operate the fabric trolley simultaneously on both sides, thereby significantly improving work efficiency and safety. At the same time, the design of the lifting device takes into account the space limitations between the fabric trolley and the traveling track 20. The detachable connection method makes the device easy to install and disassemble, thereby adapting to the lifting requirements of different fabric trolleys. Furthermore, the use of the lifting drive 13 makes the lifting operation more convenient and controllable. Compared to the traditional method of manually lifting the fabric trolley, the worker only needs to operate the lifting drive 13 to complete the lifting and lowering of the fabric trolley, eliminating the need for heavy physical labor, thereby greatly reducing the worker's labor intensity. It is understood that in other embodiments, the present invention can also be applied to the lifting operation of other large equipment.

[0035] In one embodiment, the support frame 12 includes a transmission plate 121, a first connecting plate 123 and a support plate 122; the transmission plate 121 is horizontally arranged and connected to the side of the first connecting plate 123 close to the lifting drive member 13, and the lifting drive member 13 is transmission-connected to the transmission plate 121; the support plate 122 is parallel to the transmission plate 121 and connected to the side of the first connecting plate 123 close to the side plate 30, and the support plate 122 is supported on the equipment to be lifted.

[0036] Specifically, the sequentially connected structural design of the transmission plate 121, the first connecting plate 123, and the support plate 122 enhances the overall stability of the support frame 12, enabling the support frame 12 to bear the weight of the fabric trolley and maintain balance during the lifting process. Simultaneously, the lifting drive 13 is connected to the transmission plate 121, and the fabric trolley is supported by the support plate 122. Both the transmission plate 121 and the support plate 122 are arranged horizontally, resulting in a short and direct transmission path between the lifting drive 13 and the side plate 30. This allows the lifting drive 13 to directly and efficiently drive the fabric trolley up and down, reducing energy loss during the transmission process, improving lifting efficiency, and reducing the potential for distortion or deformation of the support frame 12 caused by the transmission.

[0037] In one embodiment, the support frame 12 further includes a second connecting plate 124 . The second connecting plate 124 is connected to a side of the support plate 122 away from the first connecting plate 123 , and the balancing link 11 is detachably connected to the second connecting plate 124 .

[0038] In addition, by detachably connecting the balancing link 11 to the second connecting plate 124, the staff can easily connect the balancing link 11 to the support frame 12 or remove it from the support frame 12 without interfering with the fabric cart and other devices. This not only improves the jacking efficiency, but also reduces the safety risks caused by improper operation, while also improving the space utilization of the entire workshop.

[0039] In one embodiment, side panels 30 are provided on both sides of the equipment to be lifted, the first connecting plate 123 and the second connecting plate 124 are both vertically arranged, and the upper surfaces of the first connecting plate 123 and the second connecting plate 124 are both higher than the support plate 122, so that a positioning groove is formed between the first connecting plate 123, the support plate 122 and the second connecting plate 124, and the side panel 30 is placed in the positioning groove.

[0040] Specifically, the first connecting plate 123 and the second connecting plate 124 are arranged in parallel, the transmission plate 121, the support plate 122 and the balancing link 11 are arranged in parallel, and the positioning groove is arranged in a rectangular shape. When the side panel 30 of the material distribution vehicle is placed in the positioning groove, since the second connecting plates 124 of the two support frames 12 are connected and tightened by the balancing link 11, when the support plate 122 is supported on the bottom edge of the side panel 30, the first connecting plate 123 and the second connecting plate 124 will also be tightly attached to the side edge of the side panel 30, so that the side panel 30 is aligned and fixed in the positioning groove, thereby ensuring that the side panel 30 is always in a vertical state during jacking, so that the side panel 30 is only affected by the upward jacking force and is not affected by the horizontal pulling force. This ensures that the material distribution vehicle can remain stable and will not shake when subjected to the jacking force, which not only enhances the safety during the jacking process, but also ensures that the material distribution vehicle will not be deformed or damaged due to uneven force during maintenance. In addition, this structural design enables the lifting device to effectively support the fabric cart within a limited space, especially when the space between storage cabinets is relatively narrow. This compact support structure can minimize interference with the surrounding environment and improve space utilization.

[0041] More specifically, the transmission plate 121, the first connecting plate 123, and the support plate 122 are connected in sequence and form a Z shape. The transmission plate 121 is arranged higher than the support plate 122, and the lifting drive member 13 is located below the transmission plate 121. The Z-shaped design significantly enhances the stability of the support frame 12, allowing the support frame 12 to maintain balance during the lifting process, avoiding damage to the body or safety accidents caused by uneven force. At the same time, the design of the transmission plate 121 being higher than the support plate 122 optimizes the spatial layout. While the support frame 12 reserves sufficient installation space for the lifting drive member 13, the first connecting plate 123 and the support plate 122 can extend into the cabinet through the gap between the driving track 20 and the side panel 30, thereby ensuring that the support frame 12 can stably support the fabric cart without taking up too much space or interfering with other equipment or structures.

[0042] Furthermore, the support plate 122 is connected to the middle section of the second connecting plate 124; the positioning slot is located above the support plate 122; and the balancing link 11 is located below the support plate 122. This design ensures that even after the side panels 30 are placed in the positioning slots, the balancing link 11 can still be installed, removed, and adjusted as needed, adapting to the lifting requirements of different placing booms.

[0043] In one embodiment, the transmission plate 121 , the first connecting plate 123 , the support plate 122 and the second connecting plate 124 are all made of steel plates.

[0044] Specifically, the thickness of the steel plate is between 6 mm and 10 mm to enhance the strength and stability of the support frame 12, ensuring sufficient load-bearing capacity while ensuring the device's portability and economical manufacturing costs. It is understood that the transmission plate 121, first connecting plate 123, support plate 122, and second connecting plate 124 can be integrally formed or connected by welding or other connection methods.

[0045] In one embodiment, the first connecting plate 123 is detachably connected to the limiting assembly 14 , and the limiting assembly 14 is located above the positioning groove; when the supporting plate 122 supports the side plate 30 , the side plate 30 is limited between the limiting assembly 14 and the positioning groove.

[0046] Specifically, after the support frame 12 is installed in the gap between the material distribution vehicle and the driving track 20 so that the side panel 30 is located in the positioning groove, the limit assembly 14 is connected to the upper part of the support plate 122 so that the upper and lower ends of the side panel 30 are respectively abutted against the limit assembly 14 and the positioning groove, that is, the limit assembly 14 and the positioning groove together form a stable support structure, effectively preventing the side panel 30 from moving in the vertical direction, ensuring that the side panel 30 will not fall or shift when subjected to external forces, thereby avoiding possible safety hazards and enhancing the stability of the entire support structure. At the same time, through the detachable limit assembly 14, the user can flexibly install or remove the limit assembly 14 according to actual needs, so that the jacking device can adapt to material distribution vehicles of different sizes, thereby improving the versatility and applicability of the jacking device.

[0047] In one embodiment, the limiting assembly 14 includes a bolt 141 and a first nut 142 . A through hole 1231 is provided on the first connecting plate 123 . The bolt 141 extends into the through hole 1231 and is threadedly connected to the first nut 142 . The bolt 141 abuts against the upper surface of the side plate 30 .

[0048] Specifically, the first nut 142 is located on the side of the first connecting plate 123 that is close to the side plate 30. The bolt 141 is sequentially inserted into the through hole 1231 and the screw hole of the first nut 142, and the portion of the bolt 141 that extends out of the screw hole is used to abut the upper surface of the side plate 30. By inserting the bolt 141 into the through hole 1231 and being threadedly connected to the first nut 142, a firm connection is formed between the entire limit assembly 14 and the first connecting plate 123, which is not easy to loosen or fall off. At the same time, the insertion length of the bolt 141 can be adjusted by rotating the bolt 141. This design enables the limit assembly 14 to flexibly adjust the insertion length of the bolt 141 according to actual needs, thereby adjusting the length of the bolt 141 abutting against the upper surface of the side panel 30 according to the size and shape of the side panel 30, thereby adapting to side panels 30 of different sizes and shapes, thereby improving the versatility and applicability of the limit assembly 14, and enabling the limit assembly 14 to tightly and stably abut against the upper surface of the side panel 30, effectively ensuring that the side panel 30 will not fall off or shift when subjected to external force, thereby improving the rigidity and stability of the entire structure.

[0049] In one embodiment, the through hole 1231 is in an oblong shape, and the bolt 141 moves up and down in the through hole 1231 .

[0050] Specifically, by allowing bolt 141 to move up and down within through-hole 1231 and using first nut 142 to tighten bolt 141, the user can easily adjust the height of bolt 141 according to the specific height of side panel 30 or installation requirements. This ensures close contact between stop assembly 14 and side panel 30, helping to prevent displacement or deformation of side panel 30 when subjected to force, thereby enhancing the safety and reliability of the entire structure. In addition, the oblong shape of through-hole 1231 makes it easier to align bolt 141 with through-hole 1231 during installation, reducing complexity and uncertainty during the installation process, thereby improving the installation efficiency of the jacking device.

[0051] In one embodiment, the balancing link 11 is a screw rod, which is detachably connected to the second connecting plate 124 via a second nut 15 .

[0052] Specifically, by using a screw tie rod as the balancing link 11 and tightening or loosening the second nut 15, the horizontal distance between the two support frames 12 can be precisely adjusted. This design allows the support frames 12 to be flexibly configured according to specific needs to meet the lifting requirements of various fabric cart sizes, improving the versatility and applicability of the lifting device and facilitating its assembly and disassembly. Furthermore, the screw tie rod is securely connected to the second connecting plate 124 via the second nut 15. This design provides additional fixing force, helping to prevent the support frames 12 from displacement or deformation when subjected to force. It also balances the horizontal component of force exerted by the support frames 12 on the side panels 30, ensuring that the support frames 12 only exert vertical lifting force on the side panels 30. This also ensures that the lifting drive 13 only exerts vertical pressure on the running track 20, preventing damage to the side panels 30 and preventing bending and deformation of the running track 20. Furthermore, the inherent rigidity and strength of the screw tie rod further enhances the stability of the entire structure.

[0053] In one embodiment, the lifting drive member 13 is a hydraulic jack.

[0054] Specifically, the lifting drive 13 utilizes a hydraulic jack design, which can provide multiple benefits, including powerful lifting capabilities, ease of operation, structural stability and safety, and cost-effectiveness, thereby improving the stability and safety of the jacking device. Furthermore, the high load-bearing capacity and precise control performance of the hydraulic jack enable the jacking device to be applied in a wider range of application scenarios, further enhancing the versatility and applicability of the jacking device. It is understood that in other embodiments, the lifting drive 13 may also utilize a lifting motor, a screw jack, a pneumatic cylinder, or other drive methods.

[0055] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A lifting device, characterized in that: include: A balancing connecting rod, two symmetrically arranged support frames and two lifting drive components; The balancing link is arranged horizontally, and both ends are detachably connected to the two support frames to balance the two support frames; the two lifting drive members are respectively connected to the two support frames, and the two support frames are respectively detachably connected to both sides of the equipment to be lifted.

2. The lifting device according to claim 1, characterized in that: The support frame includes a transmission plate, a first connecting plate and a support plate; the transmission plate is horizontally arranged and connected to the side of the first connecting plate close to the lifting drive member, and the lifting drive member is transmission-connected to the transmission plate; the support plate is parallel to the transmission plate and connected to the side of the first connecting plate close to the equipment to be lifted, and the support plate is supported by the equipment to be lifted.

3. The lifting device according to claim 2, characterized in that: The support frame further includes a second connecting plate connected to a side of the support plate away from the first connecting plate, and the balancing link is detachably connected to the second connecting plate.

4. The lifting device according to claim 3, characterized in that: Side plates are provided on both sides of the equipment to be lifted, the first connecting plate and the second connecting plate are both vertically arranged, and the upper ends of the first connecting plate and the second connecting plate are both higher than the support plate, so that a positioning groove is formed between the first connecting plate, the support plate and the second connecting plate, and the side plates are placed in the positioning groove.

5. The lifting device according to claim 4, characterized in that: The first connecting plate is detachably connected to a limiting assembly, and the limiting assembly is located above the positioning groove; when the supporting plate supports the side plate, the side plate is limited between the limiting assembly and the positioning groove.

6. The lifting device according to claim 5, characterized in that: The limiting assembly includes a bolt and a first nut. A through hole is provided on the first connecting plate. The bolt extends into the through hole and is threadedly connected to the first nut. The bolt abuts against the upper surface of the side plate.

7. The lifting device according to claim 6, characterized in that: The through hole is in an oblong shape, and the bolt moves up and down in the through hole.

8. The lifting device according to claim 2, characterized in that: The transmission plate, the first connecting plate and the supporting plate are connected in sequence and form a Z shape. The transmission plate is arranged higher than the supporting plate, and the lifting driving member is located below the transmission plate.

9. The lifting device according to claim 3, characterized in that: The balancing link is a screw rod, and the screw rod is detachably connected to the second connecting plate through a second nut.

10. The lifting device according to claim 1, characterized in that: The lifting drive component is a hydraulic jack.

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