Multifunctional lifting appliance

Abstract

The invention relates to the technical field of lifting appliances, in particular to a multifunctional lifting appliance. The guide rail is fixedly mounted on the mounting frame; the crane moves along the path of the guide rail; the hoisting mechanism is used for hoisting the pipeline; the hoisting mechanism comprises a mounting plate fixedly mounted on the travelling crane; the winch is fixedly mounted on the mounting plate; the clamping assembly is used for clamping and fixing the pipeline; the auxiliary assembly is used for carrying out auxiliary fixing on the pipeline; the clamping assembly comprises a mounting box; an outer clamping plate; and an inner clamping plate. According to the pipeline hoisting device, through mutual cooperation of the clamping assemblies and the auxiliary assemblies, the two ends and the middle of the pipeline can be clamped and fixed, so that the overall stress of the pipeline in the hoisting process is relatively balanced, and the pipeline can be hoisted in the self state as far as possible; and the problems that the interior of the pipeline and the middle of the pipe body are seriously deformed during hoisting, and follow-up use of the pipeline is affected are solved.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and specifically to a multi-functional lifting equipment. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. Also known as an overhead crane, gantry crane, or hoist, it refers to the device used for lifting heavy objects. The most commonly used lifting tools for lifting packaged items are hooks and slings; others include lifting rings, lifting suction cups, clamps, and forks. Widely used in the lifting and hoisting industry, cranes are typically used in conjunction with lifting tools during operation to facilitate the lifting of objects.

[0003] Chinese patent application CN202410960221.7 discloses a crane lifting device for steel structures, comprising a slide rail beam, a crane frame, and an operating frame. The slide rail beam is supported off the ground by brackets. The crane frame is slidably connected to the slide rail beam, and several movable wheels are rotatably connected to both ends of the crane frame. A first driving component is provided on the crane frame to drive the movable wheels to rotate. The operating frame is located below the crane frame. The operating frame is connected to the crane frame via a lifting assembly. The operating frame is provided with at least one positioning claw and at least two retaining claws. The positioning claw is located between the two retaining claws, and the operating frame is provided with a control component to drive the positioning claw to move closer to or away from the operating frame. This application can reduce manual intervention during the lifting process and improve lifting efficiency.

[0004] While the lifting device in the aforementioned patent can complete the lifting of steel structures, it is difficult to achieve stable lifting of thinner pipes. Existing technologies, which use hooks and clamps, are prone to causing severe deformation of the pipe's interior and middle section during lifting. This can easily lead to pipe detachment or severe deformation and damage. Severe deformation or damage to high-value pipes can result in significant economic losses and affect their subsequent use.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of this invention is to provide a multifunctional lifting device that can effectively solve the above-mentioned technical problems.

[0007] To achieve the objectives of this invention, the following technical solution is adopted: A multi-functional lifting device includes: a mounting frame; a guide rail fixedly mounted on the mounting frame; a trolley that moves along the path of the guide rail; and a lifting mechanism for lifting pipelines. The hoisting mechanism includes: a mounting plate fixedly installed on the gantry crane; a winch fixedly installed on the mounting plate; a clamping assembly for clamping and fixing the pipeline; and an auxiliary assembly for further fixing the pipeline. The clamping assembly includes: a mounting box; an outer clamping plate; an inner clamping plate; and a drive unit that moves the outer clamping plate and the inner clamping plate. The auxiliary components include: a fixed frame; a sliding frame slidably mounted on the fixed frame; a movable plate hingedly mounted on the fixed frame; a connecting strip hinged between the movable plate and the sliding frame; and a cylinder for moving the sliding frame.

[0008] Furthermore, the drive unit includes: a drive gear rotatably mounted on the inner wall of the mounting box; a first motor that drives the drive gear to rotate; a driven gear rotatably mounted inside the mounting box; a connecting gear coaxially connected to the driven gear; a connecting rack meshing with the connecting gear; a connecting rod fixedly mounted on the connecting rack; and a limiting rod for limiting and guiding the connecting rod.

[0009] Furthermore, the mounting box has a first limiting opening, the connecting rod is slidably installed in the first limiting opening, the limiting rod is installed through the connecting rod, and the limiting rod is fixedly installed in the first limiting opening.

[0010] Furthermore, the auxiliary components also include: a first bladder fixedly installed between the sliding frame and the fixed frame; a mounting groove opened inside the movable plate; a second bladder installed in the mounting groove; and a first conduit connecting the first bladder and the second bladder.

[0011] Furthermore, the hoisting mechanism also includes a limiting component for limiting the clamping assembly; The limiting component includes: a fixed tube fixedly installed on the mounting box; a movable rod installed through the fixed tube; a snap-fit ​​block fixedly installed at one end of the movable rod; a piston fixedly installed at the other end of the movable rod; a reset spring for driving the piston to reset; a second conduit connecting the fixed tube and the first bladder body; and a limiting gear coaxially connected to the driving gear.

[0012] Furthermore, the drive gear and the limit gear are coaxially connected, one end of the return spring is fixedly connected to the piston, and the other end of the return spring is fixedly connected to the inner wall of the fixed tube.

[0013] Furthermore, the hoisting mechanism also includes an adjustment component for adjusting the position of the clamping assembly; The adjustment assembly includes: a fixed box; a bidirectional screw rotatably installed in the fixed box; a second motor that drives the bidirectional screw to rotate; a movable frame meshing with the bidirectional screw; and a fixed rod that limits the movement of the movable frame.

[0014] Furthermore, the fixing rod passes through the movable frame and is fixedly installed inside the fixed box.

[0015] Furthermore, the fixed box is provided with a second limiting opening, and the movable frame is slidably installed in the second limiting opening.

[0016] Furthermore, it also includes: a sleeve; a slider slidably installed inside the sleeve; and a connecting spring fixedly installed between the slider and the sleeve.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a multifunctional lifting device that, through the cooperation of clamping components and auxiliary components, can clamp and fix both ends and the middle of a pipeline, ensuring that the pipeline is subjected to relatively balanced forces during lifting. This allows the pipeline to maintain its original state during lifting as much as possible, avoiding severe deformation of the pipeline's interior and middle section during lifting, which could affect the pipeline's subsequent use. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] Figure 1 This is a three-dimensional schematic diagram of a multifunctional lifting device according to the present invention; Figure 2 This is a three-dimensional schematic diagram of the adjustment component of a multifunctional lifting device according to the present invention; Figure 3 This is a schematic cross-sectional view of the sleeve of a multifunctional lifting device according to the present invention; Figure 4 This is a cross-sectional schematic diagram of the fixing box of a multifunctional lifting device according to the present invention; Figure 5 This is a cross-sectional schematic diagram of the fixing frame of a multifunctional lifting device according to the present invention; Figure 6 This is a cross-sectional schematic diagram of the mounting box of a multifunctional lifting device according to the present invention; Figure 7 This invention provides a multi-functional lifting device. Figure 6 Enlarged view of point A in the middle; Figure 8 This invention provides a multi-functional lifting device. Figure 6 Enlarged view of section B in the middle.

[0020] In the picture: 1. Mounting bracket; 2. Guide rail; 3. Overhead trolley; 4. Sleeve; 5. Slider; 6. Linkage spring; 7. Lifting mechanism; 71. Mounting plate; 72. Winch; 73. Clamping assembly; 731. Outer clamping plate; 732. Inner clamping plate; 733. Drive unit; 7331. First motor; 7332. Drive gear; 7333. Driven gear; 7334. Linkage gear; 7335. Linkage rack; 7336. Connecting rod; 7337. Limiting rod; 734. Mounting box; 74. Adjustment assembly; 741 742. Fixed box; 743. Bidirectional screw; 744. Second motor; 745. Moving frame; 746. Fixed rod; 75. Auxiliary component; 751. Fixed frame; 752. Sliding frame; 753. Movable plate; 754. Linking bar; 755. Bag body one; 756. Tube one; 757. Bag body two; 758. Cylinder; 76. Limiting component; 761. Fixed tube; 762. Movable rod; 763. Snap-fit ​​block; 764. Piston; 765. Return spring; 766. Limiting gear; 767. Tube two. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0022] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0023] like Figures 1 to 8 As shown, the present invention provides a multi-functional lifting device, comprising: a mounting frame 1; a guide rail 2 fixedly mounted on the mounting frame 1; a trolley 3 that moves along the path of the guide rail 2; and a lifting mechanism 7 for lifting pipelines.

[0024] The overhead crane 3 can move the hoisting mechanism 7, making it easier to lift and transport the pipeline.

[0025] The hoisting mechanism 7 includes: a mounting plate 71 fixedly installed on the overhead crane 3; a winch 72 fixedly installed on the mounting plate 71; a clamping assembly 73 for clamping and fixing the pipeline; an auxiliary assembly 75 for auxiliary fixing the pipeline; a limiting assembly 76 for limiting the clamping assembly 73; and an adjusting assembly 74 for adjusting the position of the clamping assembly 73.

[0026] The wire rope on the winch 72 is fixedly connected to the adjusting component 74. By winding and unwinding the wire rope through the winch 72, the adjusting component 74 can be moved up and down, thereby adjusting the height of the clamping component 73.

[0027] The clamping assembly 73 is provided in two sets, which can clamp and fix both ends of the pipe.

[0028] The clamping assembly 73 includes: a mounting box 734; an outer clamping plate 731; an inner clamping plate 732; and a drive unit 733 for moving the outer clamping plate 731 and the inner clamping plate 732. The drive unit 733 includes: a drive gear 7332 rotatably mounted on the inner wall of the mounting box 734; a first motor 7331 for driving the drive gear 7332 to rotate; a driven gear 7333 rotatably mounted inside the mounting box 734, wherein the drive gear 7332 and the driven gear 7333 are meshed with each other; and a connecting gear coaxially connected to the driven gear 7333. 7334; a linkage rack 7335 meshing with the linkage gear 7334; a connecting rod 7336 fixedly mounted on the linkage rack 7335, with the outer clamping plate 731 and the inner clamping plate 732 both fixedly connected to the adjacent connecting rod 7336; a limiting rod 7337 for limiting and guiding the connecting rod 7336; a first limiting opening is provided on the mounting box 734, and the connecting rod 7336 is slidably mounted in the first limiting opening; the limiting rod 7337 is installed through the connecting rod 7336 and is fixedly mounted in the first limiting opening.

[0029] Two sets of clamping components 73 are provided. When clamping and fixing the pipe, the winch 72 is activated to move the clamping components 73 to the required height. At this time, according to the length of the pipe, the adjustment component 74 is activated to adjust the distance between the two sets of clamping components 73, so that the two ends of the pipe abut against the side walls of the adjacent mounting box 734 respectively, and the outer clamping plate 731 is located on the outside of the pipe, and the inner clamping plate 732 is located in the inner cavity of the pipe. After the distance between the two sets of clamping components 73 is adjusted, the drive unit 733 is activated to drive the outer clamping plate 731 and the inner clamping plate 732 to move synchronously, so that the outer clamping plate 731 and the inner clamping plate 732 move closer to each other, thereby clamping and fixing the outside and inner walls of the pipe at the same time, thus making the clamping stability of the pipe high.

[0030] It should be added that multiple sets of outer clamping plates 731 and inner clamping plates 732 are provided, which achieves the purpose of clamping and fixing the outer side and inner wall of the pipe at the same time. On the one hand, it realizes clamping and fixing the pipe from different directions, improving the stability of clamping and the fixing effect; on the other hand, it increases the clamping area of ​​the pipe, thereby further improving the stability of clamping and the fixing effect.

[0031] When the connecting rod 7336 moves, the first limiting opening can initially limit the connecting rod 7336, ensuring that the connecting rod 7336 moves in a straight line. The limiting rod 7337 can further limit the connecting rod 7336, preventing it from shifting when moving within the cavity of the first limiting opening and preventing it from separating from the first limiting opening, thus ensuring the stability of the connecting rod 7336 during its movement.

[0032] After the distance between the two sets of clamping components 73 is adjusted, the first motor 7331 is started to drive the drive gear 7332 to rotate. The drive gear 7332 drives multiple driven gears 7333 to rotate. The driven gears 7333 drive the connecting gear 7334 to rotate. The connecting gear 7334 drives the connecting rack 7335 that meshes with it to move. The connecting rack 7335 drives the connecting rod 7336 to move. The connecting rod 7336 drives the outer clamping plate 731 and the inner clamping plate 732 to move closer to each other. By moving closer to each other, the outer side and inner wall of the pipe can be clamped and fixed at the same time, thus making the clamping stability of the pipe high.

[0033] In addition, both the outer clamping plate 731 and the inner clamping plate 732 are designed in an arc shape, which allows the outer clamping plate 731 and the inner clamping plate 732 to fit better against the outer side and inner wall of the pipe, thereby ensuring the firmness of the clamping.

[0034] After the pipe is secured, it is hoisted to the required position by the overhead crane 3. Then, the first motor 7331 is started to drive the drive gear 7332 to rotate in the opposite direction. The drive gear 7332 drives multiple driven gears 7333 to rotate in the opposite direction. The driven gears 7333 drive the connecting gear 7334 to rotate in the opposite direction. The connecting gear 7334 drives the connecting rack 7335, which meshes with it, to move in the opposite direction. The connecting rack 7335 drives the connecting rod 7336 to move in the opposite direction. The connecting rod 7336 drives the outer clamping plate 731 and the inner clamping plate 732 to move away from each other. By moving away from each other, the clamping and fixing of the pipe can be released, and the pipe can be easily removed.

[0035] The adjusting assembly 74 includes: a fixed box 741, with the wire rope on the winch 72 fixedly connected to the fixed box 741; a bidirectional screw 742 rotatably installed inside the fixed box 741; a second motor 743 that drives the bidirectional screw 742 to rotate, the second motor 743 being fixedly installed on the fixed box 741; a movable frame 744 meshing with the bidirectional screw 742, two movable frames 744 being provided, and the two movable frames 744 being fixedly connected to adjacent mounting boxes 734 respectively; a fixing rod 745 that limits the movement of the movable frame 744; the fixing rod 745 passing through the movable frame 744 and being fixedly installed inside the fixed box 741; a second limiting opening is provided on the fixed box 741, and the movable frame 744 is slidably installed in the second limiting opening.

[0036] When the distance between the two sets of clamping components 73 is adjusted, the second motor 743 is started to drive the bidirectional screw 742 to rotate. Under the limiting action of the fixed rod 745, the two sets of clamping components 73 can be driven to move closer to each other along the axial direction of the bidirectional screw 742, thereby realizing the adjustment of the distance between the two sets of clamping components 73.

[0037] The auxiliary component 75 includes: a fixed frame 751 fixedly installed at the bottom of the fixed box 741; a sliding frame 752 slidably installed on the fixed frame 751; a movable plate 753 hingedly installed on the fixed frame 751; a connecting strip 754 hingedly installed between the movable plate 753 and the sliding frame 752; and a cylinder 758 that drives the sliding frame 752 to move, with the fixed end of the cylinder 758 fixedly installed inside the fixed frame 751 and the movable end of the cylinder 758 fixedly connected to the sliding frame 752.

[0038] After the clamping assembly 73 fixes the pipe, the starting cylinder 758 drives the sliding frame 752 to move downward. The sliding frame 752 drives the two connecting bars 754 to move downward. The two connecting bars 754 drive the adjacent movable plates 753 to move, so that the two movable plates 753 rotate at their hinge points with the fixing frame 751, that is, the two movable plates 753 move closer to each other, thereby achieving clamping and fixing of the middle part of the pipe, which plays a role in auxiliary fixing of the pipe.

[0039] The auxiliary component 75 also includes: a first capsule 755 fixedly installed between the sliding frame 752 and the fixed frame 751, the first capsule 755 storing liquid; an installation groove opened inside the movable plate 753; a second capsule 757 installed in the installation groove, the second capsule 757 being provided in multiple ways; and a first conduit 756 connecting the first capsule 755 and the second capsule 757.

[0040] When the sliding frame 752 moves downward, it can squeeze the first bladder 755, causing the liquid in the first bladder 755 to be squeezed out and flow into the second bladder 757 through the first conduit 756, causing the second bladder 757 to expand. Thus, when the movable plate 753 clamps the pipe, the second bladder 757 comes into contact with the pipe. After the second bladder 757 expands, it has a certain elasticity, which can play a buffering and protective role when the movable plate 753 clamps the pipe, avoiding excessive clamping force from the movable plate 753, which could cause the pipe to deform.

[0041] Furthermore, the contact between the capsule 757 and the pipe increases the friction between the movable plate 753 and the pipe, further improving the stability of the clamping.

[0042] In this invention, the clamping component 73 and the auxiliary component 75 work together to clamp and fix the two ends and the middle of the pipe, so that the overall force on the pipe is relatively balanced during the hoisting process. This allows the pipe to maintain its own state as much as possible during hoisting, avoiding serious deformation of the pipe's interior and middle part during hoisting, which would affect the subsequent use of the pipe.

[0043] The limiting component 76 includes: a fixed tube 761 fixedly installed on the mounting box 734; a movable rod 762 installed through the fixed tube 761; a snap-fit ​​block 763 fixedly installed at one end of the movable rod 762; a piston 764 fixedly installed at the other end of the movable rod 762; a return spring 765 that drives the piston 764 to reset; a second conduit 767 connecting the fixed tube 761 and the first bladder body 755; and a limiting gear 766 coaxially connected to the drive gear 7332. The drive gear 7332 and the limiting gear 766 are coaxially connected, one end of the return spring 765 is fixedly connected to the piston 764, and the other end of the return spring 765 is fixedly connected to the inner wall of the fixed tube 761.

[0044] When the capsule 755 is compressed, some of the liquid in the capsule 755 is transported to the fixed tube 761 through the conduit 767. The piston 764 is subjected to hydraulic pressure, which drives the movable rod 762 to move downward. The movable rod 762 drives the locking block 763 to move downward and engages with the limit gear 766. At the same time, it drives the return spring 765 to compress.

[0045] By engaging the snap-fit ​​block 763 with the limiting gear 766, the clamped state of the outer clamping plate 731 and the inner clamping plate 732 is fixed, thus preventing the clamping assembly 73 from loosening due to external force or vibration during the hoisting process, which would reduce the stability of the pipe clamping.

[0046] It also includes: sleeve 4; slider 5 slidably installed inside sleeve 4; and linkage spring 6 fixedly installed between slider 5 and sleeve 4.

[0047] Multiple sleeves 4 are provided, arranged sequentially from top to bottom, and the diameter of the sleeves 4 decreases sequentially from top to bottom. Adjacent sleeves 4 are interconnected. The top end of the uppermost sleeve 4 is fixedly connected to the mounting plate 71, and the bottom end of the lowermost sleeve 4 is fixedly connected to the fixing box 741. Slider 5 is fixedly installed on the top end of the sleeves 4 between the uppermost and lowermost sleeves 4. The slider 5 is used to prevent adjacent sleeves 4 from separating.

[0048] Through the cooperation between the sleeve 4 and the slider 5, when the winch 72 drives the hoisting mechanism 7 to move, it can limit the hoisting mechanism 7 and prevent the hoisting mechanism 7 from deviating.

[0049] When the pipeline breaks during hoisting, the hoisting mechanism 7 moves downward, which in turn moves multiple sleeves 4 downward. The sleeves 4 move adjacent sliders 5 downward, and through the elastic force of the linkage springs 6, the hoisting mechanism 7 is prevented from separating from the overhead crane 3, and the falling speed of the hoisting mechanism 7 is slowed down, thus avoiding a greater safety accident.

[0050] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0051] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A multi-functional lifting device, characterized in that, include: Mounting rack; Guide rails are fixedly installed on the mounting bracket; A vehicle that moves along the path of the guide rail; Lifting mechanism for hoisting pipelines; The hoisting mechanism includes: a mounting plate fixedly installed on the gantry crane; a winch fixedly installed on the mounting plate; a clamping assembly for clamping and fixing the pipeline; and an auxiliary assembly for further fixing the pipeline. The clamping assembly includes: a mounting box; an outer clamping plate; an inner clamping plate; and a drive unit that moves the outer clamping plate and the inner clamping plate. The auxiliary components include: a fixed frame; a sliding frame slidably mounted on the fixed frame; a movable plate hingedly mounted on the fixed frame; a connecting strip hinged between the movable plate and the sliding frame; and a cylinder for moving the sliding frame.

2. The multi-functional lifting device as described in claim 1, characterized in that, The drive unit includes: a drive gear rotatably mounted on the inner wall of the mounting box; a first motor that drives the drive gear to rotate; a driven gear rotatably mounted inside the mounting box; a connecting gear coaxially connected to the driven gear; a connecting rack meshing with the connecting gear; a connecting rod fixedly mounted on the connecting rack; and a limiting rod for limiting and guiding the connecting rod.

3. The multi-functional lifting device as described in claim 2, characterized in that, The mounting box has a first limiting opening, the connecting rod is slidably installed in the first limiting opening, the limiting rod is installed through the connecting rod, and the limiting rod is fixedly installed in the first limiting opening.

4. A multi-functional lifting device as described in claim 1, characterized in that, The auxiliary components also include: a first bladder fixedly installed between the sliding frame and the fixed frame; a mounting groove opened inside the movable plate; a second bladder installed in the mounting groove; and a first conduit connecting the first bladder and the second bladder.

5. A multi-functional lifting device as described in claim 2, characterized in that, The hoisting mechanism further includes a limiting component for limiting the clamping component; The limiting component includes: a fixed tube fixedly installed on the mounting box; a movable rod installed through the fixed tube; a snap-fit ​​block fixedly installed at one end of the movable rod; a piston fixedly installed at the other end of the movable rod; a reset spring for driving the piston to reset; a second conduit connecting the fixed tube and the first bladder body; and a limiting gear coaxially connected to the driving gear.

6. A multi-functional lifting device as described in claim 5, characterized in that, The drive gear and the limit gear are coaxially connected. One end of the return spring is fixedly connected to the piston, and the other end of the return spring is fixedly connected to the inner wall of the fixed tube.

7. A multi-functional lifting device as described in claim 1, characterized in that, The hoisting mechanism further includes: an adjustment component for adjusting the position of the clamping assembly; The adjustment assembly includes: a fixed box; a bidirectional screw rotatably installed in the fixed box; a second motor that drives the bidirectional screw to rotate; a movable frame meshing with the bidirectional screw; and a fixed rod that limits the movement of the movable frame.

8. A multi-functional lifting device as described in claim 7, characterized in that, The fixing rod passes through the movable frame and is fixedly installed inside the fixed box.

9. A multi-functional lifting device as described in claim 8, characterized in that, The fixed box has a second limiting opening, and the movable frame is slidably installed in the second limiting opening.

10. A multi-functional lifting device as described in claim 1, characterized in that, Also includes: Sleeve; slider slidably installed within the sleeve; A connecting spring is fixedly installed between the slider and the sleeve.

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