A special hanger for thin-walled cylindrical components

Abstract

The present invention relates to a special hoist for thin-walled cylindrical components, comprising a screw, a driving member, a positioning member, a linkage member, a connecting rod, a guide rail, a slider and a tongs. The screw is arranged vertically, and the driving member drives the screw to rotate. The screw is sleeved with a linkage member and a positioning member from top to bottom in sequence, and the positioning member is threadedly connected to the screw. When the screw rotates, the positioning member is driven to move upward or downward, and the positioning member drives the linkage member to move upward synchronously or move downward synchronously by the deadweight of the linkage member. No less than two guide rails are provided, and the number of sliders, connecting rods and tongs is consistent with that of the guide rails. The guide rails are arranged horizontally, and a plurality of guide rails are evenly spaced along the circumference of the screw. A slider is slidably arranged on each guide rail, and a tongs is fixedly connected to each slider, and the tongs are located below the slider. The connecting rod is rotatably connected to the linkage member at one end close to the screw, and is rotatably connected to the slider at one end away from the screw. The beneficial effect is that when the present invention is used to hoist the thin-walled cylindrical component, the roundness of the thin-walled cylindrical component can be kept constant, which is convenient for clamping it in the next station.

Description

Technical Field

[0001] The invention relates to the technical field of slings, in particular to a special sling for thin-walled cylindrical components. Background Art

[0002] During the processing of thin-walled cylindrical components, they need to be hoisted to the next workstation for clamping. At present, the hoisting tools used to hoist thin-walled cylindrical components are generally slings with a reverse clamp at both ends. During the hoisting process, in order to facilitate the clamping of the next workstation, the roundness of the thin-walled cylindrical component needs to be kept constant. Among them, the wall thickness of the thin-walled cylindrical component is 0.1-5mm.

[0003] In order to maintain its constant roundness, during the lifting process, it is necessary to ensure that the axis of the thin-walled cylindrical component coincides with the vertical center line of the sling and the spacing between the relatively arranged anti-clamping clamps is constant, so that the circumferential side wall of the thin-walled cylindrical component is evenly stressed, and to avoid increased or uneven stress on the circumferential side wall. Due to the low rigidity of the thin-walled cylindrical component, its circumferential side wall is squeezed by the anti-clamping clamp and deformed, resulting in a decrease in its roundness.

[0004] When in use, the relatively set reverse clamps are first clamped on the circumferential side wall of the thin-walled cylindrical component, and then the thin-walled cylindrical component is lifted from the center of the sling. Since the sling is made of flexible material, it is difficult to determine the center point of the sling during lifting, and it is also difficult to ensure that the relatively set reverse clamps are located on the same horizontal line. Multiple adjustments are required to make the axis of the thin-walled cylindrical component coincide with the vertical center line of the sling, resulting in low lifting efficiency. At the same time, since the sling is made of flexible material, in the process of lifting the thin-walled cylindrical component to a certain height and lifting it to the next workstation, the sling will be deformed, resulting in a reduction in the spacing between the relatively set reverse clamps or a relative tilt of the relatively set reverse clamps, resulting in an increase in force or uneven force on the circumferential side wall of the thin-walled cylindrical component, thereby reducing its roundness.

[0005] In summary, for thin-walled cylindrical components, the existing lifting equipment with a sling having a reverse clamp at both ends cannot keep the axis of the thin-walled cylindrical component always coincident with the vertical center line of the sling and the spacing between the relatively arranged reverse clamps constant during the lifting process, resulting in the inability to maintain a constant roundness of the thin-walled cylindrical component, which is inconvenient for clamping at subsequent workstations and requires multiple adjustments, resulting in low efficiency. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a special lifting device for thin-walled cylindrical components, which solves the technical problems that for thin-walled cylindrical components, the existing lifting device for a lifting belt with a reverse clamp at both ends respectively provides the axis of the thin-walled cylindrical component with the vertical center line of the lifting belt and the spacing between the relatively arranged reverse clamps cannot be kept constant during the lifting process, resulting in the inability to maintain a constant roundness of the thin-walled cylindrical component, which is inconvenient for clamping at subsequent workstations and requires multiple adjustments, resulting in low efficiency.

[0008] (II) Technical solution

[0009] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0010] The embodiment of the present invention provides a special lifting device for thin-walled cylindrical components, including a screw, a driving member, a positioning member, a linkage member, a connecting rod, a guide rail, a sliding block and a lifting clamp;

[0011] The screw is arranged vertically, and the driving member is used to drive the screw to rotate around its axis;

[0012] The linkage member and the positioning member are sequentially sleeved on the screw rod from top to bottom, and the positioning member is threadedly connected to the screw rod;

[0013] When the screw rotates, it drives the positioning member to move upward or downward, and the positioning member drives the linkage member to move upward synchronously or the linkage member moves downward synchronously due to its own weight;

[0014] The number of the guide rails is not less than two, and the number of the sliders, the connecting rods and the tongs is the same as that of the guide rails;

[0015] The guide rail is arranged horizontally, and a plurality of the guide rails are arranged at even intervals along the circumference of the screw rod;

[0016] A slider is slidably arranged on each guide rail, and a lifting clamp is fixedly connected to each slider, and the lifting clamp is located below the slider;

[0017] One end of the connecting rod close to the screw rod is rotatably connected to the linkage member, and one end of the connecting rod away from the screw rod is rotatably connected to the slider.

[0018] According to the present invention, the lifting clamp is a self-locking lifting clamp.

[0019] According to the present invention, it further comprises a fixing frame, on which the guide rail, the screw rod and the driving member are all fixed;

[0020] The fixed frame comprises a hanger frame and a frame, and the hanger frame and the frame are fixedly connected.

[0021] According to the present invention, the hanger frame is horizontally arranged and located below the guide rail, and the guide rail is fixed on the hanger frame;

[0022] The hanger frame is provided with scales along the extending direction of the guide rail, and the slider is provided with a pointer corresponding to the scales.

[0023] According to the present invention, the hanger frame is provided with a receiving through hole for receiving the lower part of the screw rod, and the bottom end of the screw rod is rotatably connected to the hanger frame through a bearing;

[0024] A bearing cover is provided below the hanger frame, and the bearing cover is used to close the accommodating through hole.

[0025] According to the present invention, the frame is vertically arranged, the bottom end of the frame is fixed on the hanger frame, the top end of the frame is fixedly connected to the driving member and the driving member is located above the screw rod.

[0026] According to the present invention, a protective cover is provided between the frame and the driving member, and the protective cover is used to seal the gap between the frame and the driving member.

[0027] According to the present invention, the driving shaft of the driving member is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the top end of the screw through a coupling.

[0028] According to the present invention, a limiting baffle is provided at one end of the guide rail away from the screw rod.

[0029] According to the present invention, a remote controller is further included, and the driving component is provided with an infrared control module, and the infrared control module is electrically connected to the remote controller and the driving component respectively.

[0030] (III) Beneficial effects

[0031] The present invention provides a special hanger for a thin-walled cylindrical component, which has the following beneficial effects:

[0032] First, the present invention adjusts the horizontal distance between the lifting clamp and the screw rod by driving the screw rod to rotate through the driving member, and the adjustment method is convenient and quick. By adjusting the horizontal distance between the lifting clamp and the screw rod to be consistent with the radius of the thin-walled cylindrical component to be clamped, the present invention can be applied to the lifting of thin-walled cylindrical components of different diameters, thereby improving the practicality of the present invention.

[0033] Second, the present invention uses a method in which the positioning member drives the linkage member to move upward synchronously or the linkage member moves downward synchronously due to its own weight when the positioning member moves downward, so that when the screw stops rotating, the positioning member can drive the linkage member to remain in the current position, thereby preventing the linkage member from moving when subjected to external force, thereby causing the horizontal spacing between the tongs and the screw to change. Among them, when the spacing increases, it is easy to cause the thin-walled cylindrical component to detach from the tongs. When the spacing decreases, it is easy to cause the circumferential side wall of the thin-walled cylindrical component to increase the force and deform, thereby reducing its roundness. Therefore, the present invention can ensure that the horizontal spacing between the tongs and the screw is constant, so that the force on the circumferential side wall of the thin-walled cylindrical component is constant, thereby making its roundness constant.

[0034] Third, the present invention sets the screw rod vertically, sets several guide rails horizontally and evenly spaced along the circumference of the screw rod, sets a slider on each guide rail, and each slider is fixedly connected to a lifting clamp, and the linkage drives several lifting clamps to move synchronously in the direction close to or away from the screw rod, so that the horizontal spacing between several lifting clamps and the screw rod is always consistent, so that when the lifting clamp is clamped on the circumferential side wall of the thin-walled cylindrical component, it is not necessary to adjust it multiple times to achieve that the axis of the thin-walled cylindrical component always coincides with the vertically arranged screw rod, thereby improving the clamping efficiency. Therefore, the present invention can quickly and efficiently achieve that the axis of the thin-walled cylindrical component always coincides with the vertically arranged screw rod, so that the force on the circumferential side wall of the thin-walled cylindrical component is uniform and constant, thereby making its roundness constant.

[0035] Fourth, since the screw and guide rails of the present invention are made of rigid materials, during the process of lifting the thin-walled cylindrical component to a certain height and lifting it to the next workstation, the screw and guide rails will not be deformed, and the slider sliding on the guide rail will not move in the up and down directions or shake in the left and right directions, so that several clamps fixed on the slider are always located at the same vertical height and the horizontal spacing between the clamps and the screw is kept constant, so that the circumferential side wall of the thin-walled cylindrical component is subjected to uniform and constant force, avoiding deformation of the circumferential side wall due to uneven force, and ensuring the constant roundness of the thin-walled cylindrical component.

[0036] As described in the second to fourth points above, when the present invention is used to hoist a thin-walled cylindrical component, it can ensure that the axis of the thin-walled cylindrical component always coincides with the vertically arranged screw rod and the horizontal spacing between the lifting clamp and the screw rod is constant, thereby keeping the roundness of the thin-walled cylindrical component constant, so as to facilitate the clamping of the thin-walled cylindrical component in the next workstation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A front view of an embodiment of a special hanger for thin-walled cylindrical components of the present invention;

[0038] Figure 2 for Figure 1 A top view of

[0039] Figure 3 for Figure 1 A front view of the first connecting member;

[0040] Figure 4 for Figure 3 Left view of

[0041] Figure 5 for Figure 3 A top view of

[0042] Figure 6 for Figure 1 A front view of the second connecting member;

[0043] Figure 7 for Figure 6 Left view of

[0044] Figure 8 for Figure 6 Top view of the .

[0045] [Description of Reference Numerals]

[0046] 11: first frame; 111: receiving through hole; 112: bearing cover; 12: second frame; 121: protective cover;

[0047] 2: screw; 21: positioning member; 22: linkage member; 23: bearing;

[0048] 3: guide rail; 31: limit baffle;

[0049] 4: driving part; 41: reducer;

[0050] 5: Slider;

[0051] 6: Lifting clamp;

[0052] 7: Connecting rod;

[0053] 81: first connecting member; 811: first horizontal plate; 812: first vertical plate;

[0054] 82: second connecting member; 821: second horizontal plate; 822: second vertical plate;

[0055] 9: Rings. DETAILED DESCRIPTION

[0056] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. Figure 1 The orientation is used as a reference.

[0057] The special lifting device for thin-walled cylindrical components provided in the embodiment of the present invention is used to lift the thin-walled cylindrical components to the next workstation during the processing of the thin-walled cylindrical components.

[0058] The special lifting device includes a screw rod 2, a driving member 4, a positioning member 21, a linkage member 22, a guide rail 3, a slider 5, a tongs 6, a connecting rod 7 and a fixing frame. The number of guide rails 3 is not less than two. The number of sliders 5, connecting rods 7 and tongs 6 is the same as that of guide rails 3.

[0059] Among them, the screw rod 2 is arranged vertically, and a plurality of guide rails 3 are arranged horizontally and evenly spaced along the circumference of the screw rod 2. The guide rails 3, the screw rod 2 and the driving member 4 are all fixed on the fixed frame. The driving member 4 is used to drive the screw rod 2 to rotate around the axis of the screw rod 2. The linkage member 22 and the positioning member 21 are sequentially sleeved on the screw rod 2 from top to bottom. The positioning member 21 is threadedly connected to the screw rod 2. When the screw rod 2 rotates, it can drive the positioning member 21 to move upward or downward, and then the positioning member 21 drives the linkage member 22 to move upward synchronously or move downward synchronously by the deadweight of the linkage member 22. A slider 5 is slidably arranged on each guide rail 3, and each slider 5 is fixedly connected to a lifting clamp 6. The lifting clamp 6 is located below the slider 5, and the lifting clamp 6 is used to clamp thin-walled cylindrical components. The end of the connecting rod 7 close to the screw rod 2 is rotatably connected to the linkage member 22, and the end of the connecting rod 7 away from the screw rod 2 is rotatably connected to the slider 5.

[0060] The working principle of the present invention is:

[0061] The driving member 4 drives the screw rod 2 to rotate around the axis of the screw rod 2, and the screw rod 2 drives the positioning member 21 to move upward or downward, and the positioning member 21 drives the linkage member 22 to move upward synchronously or move downward synchronously by the deadweight of the linkage member 22. When the linkage member 22 moves upward, it drives the end of the connecting rod 7 close to the screw rod 2 to move upward, and the end of the connecting rod 7 away from the screw rod 2 drives the slider 5 to slide along the guide rail 3 in the direction close to the screw rod 2, and the tongs 6 moves with the slider 5 in the direction close to the screw rod 2 to reduce the horizontal distance between the tongs 6 and the screw rod 2. When the linkage member 22 moves downward, it drives the end of the connecting rod 7 close to the screw rod 2 to move downward, and the end of the connecting rod 7 away from the screw rod 2 drives the slider 5 to slide along the guide rail 3 in the direction away from the screw rod 2, and the tongs 6 moves with the slider 5 in the direction away from the screw rod 2 to increase the horizontal distance between the tongs 6 and the screw rod 2. When the horizontal distance between the hanging clamp 6 and the screw rod 2 is adjusted to be consistent with the radius of the thin-walled cylindrical component to be clamped, the hanging clamp 6 is clamped on the circumferential side wall of the thin-walled cylindrical component.

[0062] Through the above configuration and its working principle, the present invention has the following advantages:

[0063] First, the present invention adjusts the horizontal distance between the lifting clamp 6 and the screw rod 2 by driving the screw rod 2 to rotate through the driving member 4, and the adjustment method is convenient and quick. By adjusting the horizontal distance between the lifting clamp 6 and the screw rod 2 to be consistent with the radius of the thin-walled cylindrical component to be clamped, the present invention can be applied to the lifting of thin-walled cylindrical components of different diameters, thereby improving the practicality of the present invention.

[0064] Second, the present invention drives the linkage member 22 to move upward synchronously by the positioning member 21, or moves downward synchronously by the deadweight of the linkage member 22 when the positioning member 21 moves downward, so that when the screw 2 stops rotating, the positioning member 21 can drive the linkage member 22 to remain in the current position, thereby preventing the linkage member 22 from moving when subjected to external force, thereby causing the horizontal spacing between the tongs 6 and the screw 2 to change. Among them, when the spacing increases, it is easy to cause the thin-walled cylindrical component to separate from the tongs 6. When the spacing decreases, it is easy to cause the circumferential side wall of the thin-walled cylindrical component to be subjected to increased force and deformed, thereby reducing its roundness. Therefore, the present invention can ensure that the horizontal spacing between the tongs 6 and the screw 2 is constant, so that the circumferential side wall of the thin-walled cylindrical component is subjected to constant force, thereby causing its roundness to be constant.

[0065] Third, the present invention sets the screw 2 vertically, sets several guide rails 3 horizontally and evenly spaced along the circumference of the screw 2, sets a slider 5 on each guide rail 3, and each slider 5 is fixedly connected to a tong 6, and the linkage 22 drives several tongs 6 to move synchronously in the direction of approaching or away from the screw 2, so that the horizontal spacing between several tongs 6 and the screw 2 is always consistent, so that when the tongs 6 are clamped on the circumferential side wall of the thin-walled cylindrical component, the axis of the thin-walled cylindrical component can always coincide with the vertically arranged screw 2 without multiple adjustments, thereby improving the clamping efficiency. Therefore, the present invention can quickly and efficiently achieve that the axis of the thin-walled cylindrical component always coincides with the vertically arranged screw 2, so that the force on the circumferential side wall of the thin-walled cylindrical component is uniform and constant, thereby making its roundness constant.

[0066] Fourthly, since the screw rod 2 and the guide rail 3 of the present invention are both made of rigid materials, in the process of lifting the thin-walled cylindrical component to a certain height and lifting it to the next workstation, the screw rod 2 and the guide rail 3 will not be deformed, and the slider 5 slidably arranged on the guide rail 3 will not move in the up and down directions or shake in the left and right directions, so that a plurality of tongs 6 fixed on the slider 5 are always located at the same vertical height and the horizontal spacing between the tongs 6 and the screw rod 2 remains constant, so that the circumferential side wall of the thin-walled cylindrical component is subjected to uniform and constant force, avoiding deformation of the circumferential side wall due to uneven force, and ensuring the constant roundness of the thin-walled cylindrical component.

[0067] As described in the second to fourth points above, when the present invention is used to hoist a thin-walled cylindrical component, it can ensure that the axis of the thin-walled cylindrical component always coincides with the vertically arranged screw rod 2 and the horizontal spacing between the lifting clamp 6 and the screw rod 2 is constant, thereby keeping the roundness of the thin-walled cylindrical component constant, so as to facilitate the clamping of the thin-walled cylindrical component in the next workstation.

[0068] Furthermore, a limit baffle 31 is provided at one end of the guide rail 3 away from the screw rod 2 , and the limit baffle 31 is used to limit the movable range of the slider 5 to prevent the slider 5 from derailing.

[0069] Preferably, in order to improve the connection stability between the slider 5 and the tongs 6, the slider 5 and the tongs 6 are fixedly connected by a first connecting member 81. The first connecting member 81 includes a first horizontal plate 811 and two first vertical plates 812. The first horizontal plate 811 is horizontally arranged, and the two first vertical plates 812 are symmetrically arranged on both sides of the first horizontal plate 811. The space formed by the first horizontal plate 811 and the two first vertical plates 812 is used to accommodate the upper part of the slider 5 and the tongs 6. Through holes are provided on the first horizontal plate 811 and the first vertical plate 812, and the slider 5 is threadedly connected to the first horizontal plate 811 through the through holes provided on the first horizontal plate 811, and the tongs 6 is threadedly connected to the first vertical plate 812 through the through holes provided on the first vertical plate 812.

[0070] Preferably, in order to improve the connection stability between the slider 5 and the connecting rod 7, the slider 5 and the connecting rod 7 are connected by a second connecting member 82. The second connecting member 82 includes a second horizontal plate 821 and two second vertical plates 822. The second horizontal plate 821 is horizontally arranged, and the two second vertical plates 822 are symmetrically arranged on the top of the second horizontal plate 821. The space formed by the second horizontal plate 821 and the two second vertical plates 822 is used to accommodate the connecting rod 7. Through holes are provided on the second horizontal plate 821 and the second vertical plate 822, and the connecting rod 7 is rotatably connected to the second vertical plate 822 through the through holes provided on the second vertical plate 822, and the slider 5 is threadedly connected to the second horizontal plate 821 through the through holes provided on the second horizontal plate 821.

[0071] It should be noted that the method in which the slider 5 and the tongs 6 are fixedly connected by the first connecting member 81 and the method in which the slider 5 and the connecting rod 7 are connected by the second connecting member 82 are examples, and other methods that can achieve stable connection between the slider 5 and the tongs 6, and the slider 5 and the connecting rod 7 are also possible.

[0072] Preferably, the lifting clamp 6 is a self-locking lifting clamp to ensure that the lifting clamp 6 can stably clamp the thin-walled cylindrical component during the lifting process to prevent the thin-walled cylindrical component from escaping from the lifting clamp 6 .

[0073] In order to improve the clamping stability of the thin-walled cylindrical component by the tongs 6, the present invention preferably provides four tongs 6 so that the four tongs 6 can stably clamp the circumferential side wall of the thin-walled cylindrical component. It should be noted that the number of guide rails 3 can be determined according to the actual required clamping force, so as to ensure that the tongs 6 can stably clamp the thin-walled cylindrical component.

[0074] Preferably, in order to ensure stable lifting of thin-walled cylindrical components, the adjustable range of the horizontal spacing between the lifting clamp 6 and the screw 2 in the present invention is 200-300 mm, that is, the present invention is suitable for lifting thin-walled cylindrical components with a diameter of 400-600 mm. It should be noted that the above adjustable range is only for example, and can be determined according to the size of the special lifting tool, the clamping strength and the weight of the thin-walled cylindrical component.

[0075] Furthermore, the fixed frame includes a first frame 11 and a second frame 12, which are fixedly connected.

[0076] The first frame 11 is horizontally arranged and located below the guide rail 3 , and the guide rail 3 is fixed on the first frame 11 .

[0077] The first frame 11 is provided with a receiving through hole 111 for receiving the lower part of the screw rod 2. The bottom end of the screw rod 2 is rotatably connected to the first frame 11 through a bearing 23 to prevent the lower part of the screw rod 2 from shaking during the rotation process, thereby improving the stability of the lifting process. A bearing cover 112 is provided below the first frame 11, and the bearing cover 112 is used to close the receiving through hole 111 to prevent external dust or debris from entering the bearing 23 at the bottom end of the screw rod 2 and affecting the rotation of the screw rod 2.

[0078] Preferably, a scale is provided on the first frame 11 along the extension direction of the guide rail 3, and a pointer is correspondingly provided on the slider 5. When the slider 5 slides along the guide rail 3 to adjust the horizontal spacing between the tongs 6 and the screw rod 2, the scale indicated by the pointer can read the spacing value in real time without measurement.

[0079] Further, the second frame 12 is vertically arranged. The bottom end of the second frame 12 is fixed to the first frame 11, and the top end of the second frame 12 is fixedly connected to the driving member 4 so that the driving member 4 is located above the screw 2. A protective cover 121 is provided between the second frame 12 and the driving member 4 to seal the gap between the second frame 12 and the driving member 4 to prevent external dust or debris from entering the driving member 4 and affecting its normal operation.

[0080] Furthermore, the driving shaft of the driving member 4 is connected to the input shaft of the reducer 41, and the output shaft of the reducer 41 is connected to the top end of the screw 2 through a coupling. The driving member 4 drives the screw 2 to rotate around its axis through the driving shaft.

[0081] Preferably, in order to facilitate the adjustment of the horizontal distance between the tongs 6 and the screw rod 2, an infrared control module may be provided on the driving member 4, and the infrared control module is electrically connected to the remote controller and the driving member 4 respectively. Figure 2 In the viewing direction, when the remote control sends a control signal to the infrared control module, the infrared control module receives the signal and controls the drive shaft of the driver 4 to switch to the clockwise rotation, counterclockwise rotation and stop rotation states, and the drive shaft drives the screw 2 to rotate clockwise, counterclockwise and stop rotation accordingly, thereby increasing, decreasing and maintaining the horizontal spacing between the tongs 6 and the screw 2 constant, or decreasing, increasing and maintaining the horizontal spacing between the tongs 6 and the screw 2 constant. It should be noted that the above-mentioned setting of the infrared control module is only an example, and other setting methods that can control the drive shaft of the driver 4 to switch to the clockwise rotation, counterclockwise rotation and stop rotation states are all acceptable.

[0082] Optionally, the driving member 4 is a DC motor.

[0083] Furthermore, a lifting ring 9 is provided above the driving member 4. The lifting ring 9 is located on the axis of the screw rod 2. The lifting ring 9 is hoisted on a device for driving the present invention to perform lifting and horizontal movements.

[0084] It should be noted that the present invention is also applicable to the hoisting of other cylindrical components.

[0085] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A special hanger for thin-walled cylindrical components, characterized in that: It comprises a screw rod (2), a driving member (4), a positioning member (21), a linkage member (22), a connecting rod (7), a guide rail (3), a sliding block (5) and a lifting clamp (6); The screw rod (2) is arranged vertically, and the driving member (4) is used to drive the screw rod (2) to rotate around its axis; The linkage member (22) and the positioning member (21) are sequentially sleeved on the screw rod (2) from top to bottom, and the positioning member (21) is threadedly connected to the screw rod (2); When the screw rod (2) rotates, it drives the positioning member (21) to move upward or downward, and the positioning member (21) drives the linkage member (22) to move upward synchronously, or the linkage member (22) moves downward synchronously due to its own weight; When the screw rod (2) stops rotating, the positioning member (21) can drive the linkage member (22) to remain at the current position; The number of the guide rails (3) is not less than two, and the number of the sliders (5), the connecting rods (7) and the tongs (6) is the same as that of the guide rails (3); The guide rail (3) is arranged horizontally, and a plurality of the guide rails (3) are arranged at even intervals along the circumference of the screw rod (2); A slider (5) is slidably arranged on each guide rail (3), and a lifting clamp (6) is fixedly connected to each slider (5), and the lifting clamp (6) is located below the slider (5); One end of the connecting rod (7) close to the screw rod (2) is rotatably connected to the linkage member (22), and one end of the connecting rod (7) away from the screw rod (2) is rotatably connected to the slider (5); When the horizontal distance between the lifting clamp (6) and the screw rod (2) is adjusted to be consistent with the radius of the thin-walled cylindrical component to be clamped, the lifting clamp (6) clamps the circumferential side wall of the thin-walled cylindrical component; The sliding block (5) and the lifting clamp (6) are fixedly connected via a first connecting member (81); the first connecting member (81) comprises a first horizontal plate (811) and two first vertical plates (812).

2. The special lifting device for thin-walled cylindrical components according to claim 1, characterized in that: The lifting clamp (6) is a self-locking lifting clamp.

3. The special lifting device for thin-walled cylindrical components according to claim 1, characterized in that: It also includes a fixing frame, on which the guide rail (3), the screw rod (2) and the driving member (4) are all fixed; The fixed frame comprises a first frame (11) and a second frame (12), and the first frame (11) and the second frame (12) are fixedly connected.

4. The special lifting device for thin-walled cylindrical components according to claim 3, characterized in that: The first frame (11) is arranged horizontally and is located below the guide rail (3), and the guide rail (3) is fixed on the first frame (11); The first frame (11) is provided with a scale along the extension direction of the guide rail (3), and the slider (5) is provided with a pointer corresponding to the scale.

5. The special lifting device for thin-walled cylindrical components according to claim 4, characterized in that: The first frame (11) is provided with a receiving through hole (111) for receiving the lower part of the screw rod (2), and the bottom end of the screw rod (2) is rotatably connected to the first frame (11) via a bearing (23); A bearing cover (112) is provided below the first frame (11), and the bearing cover (112) is used to close the accommodating through hole (111).

6. The special lifting device for thin-walled cylindrical components according to claim 4, characterized in that: The second frame (12) is arranged vertically, the bottom end of the second frame (12) is fixed on the first frame (11), and the top end of the second frame (12) is fixedly connected to the driving member (4) so ​​that the driving member (4) is located above the screw rod (2).

7. The special lifting device for thin-walled cylindrical components according to claim 6, characterized in that: A protective cover (121) is provided between the second frame (12) and the driving member (4), and the protective cover (121) is used to seal a gap between the second frame (12) and the driving member (4).

8. The special lifting device for thin-walled cylindrical components according to claim 6, characterized in that: The driving shaft of the driving member (4) is connected to the input shaft of the reducer (41), and the output shaft of the reducer (41) is connected to the top end of the screw rod (2) via a coupling.

9. The special lifting device for thin-walled cylindrical components according to claim 1, characterized in that: A limit baffle (31) is provided at one end of the guide rail (3) away from the screw rod (2).

10. The special lifting device for thin-walled cylindrical components according to claim 1, characterized in that: It also comprises a remote controller, wherein the driving component (4) is provided with an infrared control module, and the infrared control module is electrically connected to the remote controller and the driving component (4) respectively.

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