Gravity self-adaptive clamping lifting appliance

Abstract

The utility model provides a gravity self-adaptive clamping lifting appliance, which relates to the technical field of clamping lifting appliances and comprises a first lifting arm movably arranged on a fixed cross beam and a second lifting arm fixedly arranged on the fixed cross beam, the first clamp arm is hinged to the second clamp arm, one ends of the two connecting rods are hinged to the ends, away from the fixed cross beam, of the first clamp arm and the second clamp arm respectively, and the other ends of the two connecting rods are hinged; a first through hole and a first slotted hole are formed in the fixed cross beam, one end of the first clamp arm is hinged to the first through hole through a first shaft rod, and one end of the second clamp arm is hinged to the first slotted hole through a second shaft rod; the movable cross beam is respectively connected with the second shaft rod and the first suspension arm. Compared with the prior art, the gravity self-adaptive clamping lifting appliance has the advantages that the clamping force is automatically adjusted according to the weight of a workpiece, the situation that the workpiece is damaged due to the fact that the clamping force is too large or slippage is caused due to the fact that the clamping force is insufficient is avoided, and the lifting operation safety and the operation efficiency are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to clamping hoist technical field, specifically, relates to a gravity self -adaptation clamping hoist. BACKGROUND

[0002] As the key equipment in the field of industrial hoisting, the clamping hoist realizes the grabbing and fixing of various heavy objects through mechanical or hydraulic / pneumatic clamping structure, and completes the material transfer operation with the hoisting equipment. The core technical index of this kind of equipment lies in whether it can provide stable and reliable clamping force to ensure that the heavy object does not fall off or displace in the hoisting process, and is widely used in the handling operation of steel, plate, pipe, container and various special-shaped parts. The traditional clamping hoist generally adopts the design mode of fixed clamping force. This design has obvious technical defects: when facing workpieces of different weights or shapes, the uniform clamping force setting will lead to unbalanced clamping effect. For lighter or easily damaged workpieces, excessive clamping force may cause damage to the surface or deformation of the structure of the workpiece; and for heavy workpieces, insufficient clamping force may cause the workpiece to slip or even fall during hoisting, which poses a serious safety hazard. SUMMARY

[0003] The utility model aims at providing a gravity self -adaptation clamping hoist, has the advantages that the clamping force is automatically adjusted according to the weight of the workpiece, the damage of the workpiece caused by excessive clamping force or the slip caused by insufficient clamping force is avoided, and the safety and operation efficiency of hoisting operation are significantly improved.

[0004] The utility model provides a gravity self -adaptation clamping hoist, include: fixed crossbeam, movable crossbeam, first hoist arm, second hoist arm, first pincer arm, second pincer arm and connecting rod, the first hoist arm can be along the extension direction of fixed crossbeam removal be connected to one end of fixed crossbeam, the second hoist arm fixed connection to the other end of fixed crossbeam, the first hoist arm and the second hoist arm are away from the one end of fixed crossbeam respectively is provided with clamping block, the first pincer arm and the second pincer arm cross arrangement and are mutually hinged, and are arranged in the middle position of fixed crossbeam, one end of two connecting rods is hinged with the first pincer arm and the second pincer arm away from the one end of fixed crossbeam, and the other end of two connecting rods is hinged, the fixed crossbeam is spaced apart and is provided with first long slot hole and first through -hole along the direction of one end to the other end, the first pincer arm is away from the one end of connecting rod and is hinged at first through -hole place through first axle rod, the second pincer arm is away from the one end of connecting rod and is hinged at first long slot hole place through second axle rod, and the second axle rod can move along first long slot hole, the movable crossbeam is connected with second axle rod and first hoist arm, and the second axle rod is used for driving first hoist arm to move towards the direction of close to or away from second hoist arm through movable crossbeam.

[0005] Optionally, one end of the fixed cross beam is further provided with a second long slot hole, the first lifting arm is connected with a third shaft rod, and the third shaft rod penetrates through the second long slot hole, so that the first lifting arm is movably connected to one end of the fixed cross beam along the extension direction of the fixed cross beam.

[0006] Optionally, the movable cross beam is provided with a second through hole, and the third shaft rod penetrates through the second through hole.

[0007] Optionally, the fixed cross beam is further provided with a third through hole, the second lifting arm is connected with a fourth shaft rod, and the fourth shaft rod penetrates through the third through hole.

[0008] Optionally, the movable cross beam is provided with a third long slot hole, and the fourth shaft rod penetrates through the third long slot hole.

[0009] Optionally, the movable cross beam is provided with a fourth through hole and a fourth long slot hole, the first shaft rod penetrates through the fourth long slot hole, and the second shaft rod penetrates through the fourth through hole.

[0010] Optionally, the first lifting arm and the second lifting arm are respectively provided with a window, and the first lifting arm and the second lifting arm are sleeved on the fixed cross beam through the windows.

[0011] Optionally, the two connecting rods are hingedly connected through a fifth shaft rod, the fifth shaft rod is provided with an upper top block, and the upper top block is provided with a lifting ring.

[0012] Optionally, the clamping block is provided with a groove, and the groove is provided with an anti-skid pad.

[0013] Optionally, the fixed cross beam is spaced apart and provided with two, and the movable cross beam is movably arranged between the two fixed cross beams.

[0014] Compared with the related art, the gravity self-adaptive clamping lifting appliance has the following beneficial effects, but is not limited thereto:

[0015] The gravity self-adaptive clamping hoist, one end of the two connecting rods can adopt pin shaft connection, the intersection of the two connecting rods forms a motion node in the four connecting rod mechanism, the intersection of the two connecting rods can be connected with the lifting hook of the crane, when the crane pulls up the intersection of the two connecting rods through the lifting hook, the two connecting rods are driven to move synchronously, the two connecting rods further drive the first clamp arm and the second clamp arm to move synchronously, at the same time, the second clamp arm drives the second shaft rod to move along the first long slot hole, the second shaft rod further drives the first lifting arm to move towards the second lifting arm through the movable cross beam, so that the workpiece placed between the first lifting arm and the second lifting arm is clamped, the workpiece can be lifted by continuing to lift up through the crane, with the increase of the gravity of the workpiece, the sliding displacement of the second shaft rod increases, the four connecting rod mechanism (the first clamp arm, the second clamp arm and the two connecting rods) is enlarged to form stronger clamping reaction force, and dynamic matching of the clamping force and the gravity of the workpiece is realized. Compared with the related art, the traditional clamping mechanism relies on preset pressure parameters and cannot adapt to the gravity distribution difference of different workpieces. The utility model realizes automatic adjustment of the clamping force without external power source through the mechanical linkage structure to convert the gravity into clamping action. According to the above technical scheme, the utility model can automatically generate matched clamping reaction force according to the gravity of the workpiece, and the problems of excessive or insufficient clamping force are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic diagram of the gravity self-adaptive clamping hoist of the utility model embodiment;

[0017] Figure 2 It is the structure schematic diagram of the fixed cross beam of the utility model embodiment;

[0018] Figure 3 It is the structure schematic diagram of the movable cross beam of the utility model embodiment;

[0019] Figure 4 It is the structure schematic diagram of the upper structure of the gravity self-adaptive clamping hoist of the utility model embodiment;

[0020] Figure 5 It is the structure schematic diagram of the first lifting arm of the utility model embodiment;

[0021] Figure 6 It is the structure schematic diagram of the second lifting arm of the utility model embodiment.

[0022] BRIEF DESCRIPTION OF DRAWINGS:

[0023] 1, fixed cross beam; 101, first through hole; 102, first long slot hole; 103, second long slot hole; 104, third through hole; 2, movable cross beam; 201, second through hole; 202, third long slot hole; 203, fourth through hole; 204, fourth long slot hole; 3, first lifting arm; 4, second lifting arm; 5, first clamping arm; 6, second clamping arm; 7, connecting rod; 8, clamping block; 9, first shaft; 10, second shaft; 11, third shaft; 12, fourth shaft; 13, window; 14, fifth shaft; 15, upper top block; 16, lifting ring; 17, non-slip pad. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] In the description of the present application, the orientation or position relationship indicated by "up", "down", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the description of the present application, the description of the terms "embodiment", "one embodiment" and "one embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or embodiment are included in at least one embodiment or embodiment of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0028] Furthermore, in the attached diagram, the X-axis represents the horizontal direction, that is, the left and right position, with the positive direction of the X-axis representing the left and the negative direction of the X-axis representing the right; the Y-axis represents the vertical direction, that is, the front and back position, with the positive direction of the Y-axis representing the front and the negative direction of the Y-axis representing the back; and the Z-axis represents the vertical direction, that is, the up and down position, with the positive direction of the Z-axis representing the up and the negative direction of the Z-axis representing the down.

[0029] It should also be noted that the aforementioned X-axis, Y-axis and Z-axis are used only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 of the present invention.

[0030] like Figures 1 to 6 As shown, the gravity-adaptive clamping lifting device of this utility model embodiment includes: a fixed crossbeam 1, a movable crossbeam 2, a first lifting arm 3, a second lifting arm 4, a first clamping arm 5, a second clamping arm 6, and connecting rods 7; the first lifting arm 3 is movably connected to one end of the fixed crossbeam 1 along the extension direction of the fixed crossbeam 1, and the second lifting arm 4 is fixedly connected to the other end of the fixed crossbeam 1. Clamping blocks 8 are respectively provided at the ends of the first lifting arm 3 and the second lifting arm 4 away from the fixed crossbeam 1; the first clamping arm 5 and the second clamping arm 6 are cross-arranged and hinged to each other, and are arranged at the middle position of the fixed crossbeam 1. One end of each of the two connecting rods 7 is respectively connected to the first clamping arm 5 and the second clamping arm 6 away from the fixed crossbeam 1. One end of the crossbeam 1 is hinged, and the other ends of the two connecting rods 7 are hinged together. The fixed crossbeam 1 is provided with a first elongated slot 102 and a first through hole 101 spaced apart along the direction from one end to the other. The end of the first clamping arm 5 away from the connecting rod 7 is hinged to the first through hole 101 through a first shaft 9. The end of the second clamping arm 6 away from the connecting rod 7 is hinged to the first elongated slot 102 through a second shaft 10, and the second shaft 10 can move along the first elongated slot 102. The movable crossbeam 2 is connected to the second shaft 10 and the first boom 3 respectively. The second shaft 10 is used to drive the first boom 3 to move toward or away from the second boom 4 through the movable crossbeam 2.

[0031] In this embodiment, in conjunction with the appendix Figure 1 To be continued Figure 6 As shown, the first elongated slot 102 refers to the slot along the length of the fixed crossbeam 1 (see attached diagram). Figure 1 A strip-shaped channel extending along the X-axis (in the middle direction), which can be implemented using a slotted steel plate, is used to guide the directional sliding of the second shaft 10. The movable crossbeam 2 refers to a moving component arranged parallel to the fixed crossbeam 1, which transmits displacement by connecting the second shaft 10 to the first boom 3. The clamping block 8 refers to the component located at the lower end of the first boom 3 and the second boom 4 (attached). Figure 1The contact component in the middle Z-axis reverse direction can specifically adopt an alloy steel block with anti-skid lines, which is used for increasing the friction contact area with the workpiece, and the shape of the clamping block 8 can be adjusted according to the shape of the workpiece.

[0032] One end of the two connecting rods 7 can be connected by a pin shaft, and the intersection of the two connecting rods 7 forms a motion node in the four-bar linkage mechanism. The intersection of the two connecting rods 7 can be connected with the hook of the crane. When the crane pulls the intersection of the two connecting rods 7 upward through the hook, the two connecting rods 7 are driven to move synchronously, and the first clamping arm 5 and the second clamping arm 6 are driven to move synchronously. At the same time, the second clamping arm 6 drives the second shaft rod 10 to move along the first long slot hole 102, and the second shaft rod 10 drives the first lifting arm 3 to move towards the second lifting arm 4 (see FIG. 4) through the movable cross beam 2, so as to clamp the workpiece placed between the first lifting arm 3 and the second lifting arm 4. Figure 1 The workpiece can be lifted by continuing to lift upward through the crane. As the gravity of the workpiece increases, the sliding displacement of the second shaft rod 10 increases, and a stronger clamping reaction force is formed through the four-bar linkage mechanism (the first clamping arm 5, the second clamping arm 6 and the two connecting rods 7) to realize dynamic matching of the clamping force and the gravity of the workpiece.

[0033] Compared with the related art, the conventional clamping mechanism relies on a preset pressure parameter and cannot adapt to the gravity distribution difference of different workpieces. The utility model realizes automatic adjustment of the clamping force without an external power source by converting the gravity into a clamping action through a mechanical linkage structure. According to the technical scheme, the utility model can automatically generate a matched clamping reaction force according to the gravity of the workpiece to avoid the problem of excessive or insufficient clamping force.

[0034] Optionally, one end of the fixed cross beam 1 is also provided with a second long slot hole 103, the first lifting arm 3 is connected with a third shaft rod 11, and the third shaft rod 11 penetrates through the second long slot hole 103, so that the first lifting arm 3 is movably connected to one end of the fixed cross beam 1 along the extension direction of the fixed cross beam 1.

[0035] In this embodiment, as shown in FIGS. 1 to 4, the movable cross beam 2 is connected between the first clamping arm 5 and the second clamping arm 6, and the movable cross beam 2 is connected with the first shaft rod 9 and the second shaft rod 10. Figure 1 The first shaft rod 9 is a cylindrical rigid connecting piece installed on the first clamping arm 5, and the second shaft rod 10 is a cylindrical rigid connecting piece installed on the second clamping arm 6. Figure 2 The first shaft rod 9 and the second shaft rod 10 are connected with the movable cross beam 2, and the first shaft rod 9 and the second shaft rod 10 are connected with the two connecting rods 7. Figure 5 The second long slot hole 103 is a strip-shaped hole extending along the length direction of the fixed cross beam 1 (the X-axis direction in FIG. 1). Figure 1 The third shaft rod 11 is a cylindrical rigid connecting piece installed on the first lifting arm 3, and the two ends of the third shaft rod 11 can have a threaded structure and be locked on the first lifting arm 3 by a nut. The cooperation relationship between the second long slot hole 103 and the third shaft rod 11 can limit the movement track of the first lifting arm 3 and provide linear guiding constraint for clamping distance adjustment.

[0036] Specifically, when the third shaft rod 11 penetrates through the second long slot hole 103, the outer wall of the third shaft rod 11 forms a sliding contact with the inner wall of the second long slot hole 103. When the movable cross beam 2 is displaced by an external force, the third shaft rod 11 moves along the length direction of the second long slot hole 103, driving the first lifting arm 3 to translate relative to the fixed cross beam 1. The linear extension characteristic of the second long slot hole 103 precisely defines the moving path of the first lifting arm 3, avoiding misalignment of the clamping block 8 caused by deviation of the movement trajectory.

[0037] Optionally, a second through hole 201 is formed in the movable cross beam 2, and the third shaft rod 11 penetrates through the second through hole 201.

[0038] In this embodiment, as shown in Figure 1 , Fig. 2, Figure 3 and Fig. 3, Figure 5 the second through hole 201 is a circular hole formed on the surface of the movable cross beam 2, and the hole diameter is matched with the shaft diameter of the third shaft rod 11.

[0039] Specifically, when the second shaft rod 10 slides along the first long slot hole 102 under the action of gravity, the movable cross beam 2 is displaced horizontally. At this time, the third shaft rod 11 penetrates through the second through hole 201 and slides along the inner wall thereof, and the displacement of the movable cross beam 2 is transmitted to the first lifting arm 3 through the cooperation of the third shaft rod 11 and the second through hole 201, thereby driving the first lifting arm 3 to move relative to the fixed cross beam 1. Since the inner wall of the second through hole 201 rigidly constrains the sliding trajectory of the third shaft rod 11, the movement synchronization between the movable cross beam 2 and the first lifting arm 3 is guaranteed, avoiding uneven distribution of clamping force caused by displacement deviation.

[0040] Optionally, a third through hole 104 is formed in the fixed cross beam 1, and a fourth shaft rod 12 is connected to the second lifting arm 4, and the fourth shaft rod 12 penetrates through the third through hole 104.

[0041] In this embodiment, as shown in Figure 1 , Fig. 4, Figure 2 , Fig. 5, Figure 6 and Fig. 6, the third through hole 104 is a circular through hole formed in the fixed cross beam 1, which is used to define the mounting position of the fourth shaft rod 12. The fourth shaft rod 12 is a cylindrical metal rod connected to the second lifting arm 4, and the two ends thereof can have a threaded structure and are locked on the second lifting arm 4 by nuts.

[0042] Specifically, when the fourth shaft rod 12 penetrates through the third through hole 104, the second lifting arm 4 is constrained at a specific position of the fixed cross beam 1. When the spreader bears a load, the fourth shaft rod 12 contacts the inner wall of the third through hole 104 to form a support surface, so that the second lifting arm 4 cannot be deviated laterally during clamping.

[0043] Optionally, a third long slot hole 202 is formed on the movable cross beam 2, and the fourth shaft rod 12 penetrates through the third long slot hole 202.

[0044] In the embodiment, as shown in Figs. 1 to 3, the fourth long slot hole 202 is a strip-shaped hole extending along the length direction of the movable cross beam 2 (X-axis direction in Fig. 1), and is used for guiding the directional sliding of the fourth shaft rod 12. Figure 1 Figure 2 Figure 6 As shown in Figs. 1 to 3, the fourth long slot hole 202 is a strip-shaped hole extending along the length direction of the movable cross beam 2 (X-axis direction in Fig. 1), and is used for guiding the directional sliding of the fourth shaft rod 12. Figure 1

[0045] Specifically, when the movable cross beam 2 is displaced by external force, the fourth shaft rod 12 slides in the fourth long slot hole 202 along the length direction thereof, so that the relative position between the second hanging arm 4 and the movable cross beam 2 is adjusted. It should be noted that the second hanging arm 4 and the fourth shaft rod 12 are fixed, and the movable cross beam 2 is movable.

[0046] Optionally, a fourth through hole 203 and a fourth long slot hole 204 are formed on the movable cross beam 2, the first shaft rod 9 penetrates through the fourth long slot hole 204, and the second shaft rod 10 penetrates through the fourth through hole 203.

[0047] In the embodiment, as shown in Figs. 4 to 6, the fourth through hole 203 is a circular hole structure formed on the movable cross beam 2, and is used for limiting the transverse displacement of the second shaft rod 10. The fourth long slot hole 204 is a strip-shaped hole structure formed on the movable cross beam 2, and is used for allowing the first shaft rod 9 to slide along the length direction thereof (X-axis direction in Fig. 4). Figure 1 Figure 2 Figure 4 As shown in Figs. 4 to 6, the fourth through hole 203 is a circular hole structure formed on the movable cross beam 2, and is used for limiting the transverse displacement of the second shaft rod 10. The fourth long slot hole 204 is a strip-shaped hole structure formed on the movable cross beam 2, and is used for allowing the first shaft rod 9 to slide along the length direction thereof (X-axis direction in Fig. 4). Figure 1

[0048] Specifically, when external load acts on the clamping block 8, the second shaft rod 10 pushes the movable cross beam 2 to displace under the constraint of the fourth through hole, and at this time, the first shaft rod 9 slides in the fourth long slot hole 204, so that the hinge angle between the first clamp arm 5 and the second clamp arm 6 changes.

[0049] Optionally, the first hanging arm 3 and the second hanging arm 4 are respectively provided with a window 13, and the first hanging arm 3 and the second hanging arm 4 are respectively sleeved on the fixed cross beam 1 through the window 13.

[0050] In the embodiment, as shown in Figs. 7 to 9, the window 13 is a through structure formed on the side wall of the first hanging arm 3 and the second hanging arm 4, and can be implemented by a rectangular opening structure. Figure 1 Figure 5 Figure 6 As shown in Figs. 7 to 9, the window 13 is a through structure formed on the side wall of the first hanging arm 3 and the second hanging arm 4, and can be implemented by a rectangular opening structure.

[0051] ​​​​​​​​Specifically, the windows 13 of the first boom 3 and the second boom 4 allow the fixed crossbeam 1 to pass through them, forming a lateral sliding fit. When the movable crossbeam 2 moves the first boom 3, the contact surface between the window 13 and the fixed crossbeam 1 provides sliding guidance, restricting the degree of freedom of the first boom 3 in the non-moving direction. The window 13 of the second boom 4 is also fitted onto the fixed crossbeam 1, and its fixed state can be achieved by tightening bolts.

[0052] Optionally, the two connecting rods 7 are hinged together by a fifth shaft 14, on which an upper top block 15 is provided, and on which a lifting ring 16 is provided.

[0053] In this embodiment, in conjunction with the appendix Figure 4 As shown, the fifth shaft refers to the hinged component connecting the two connecting rods 7. It can be implemented using a cylindrical metal rod, with both ends connected to the connecting rods 7 via bushings to achieve rotational freedom. The upper block 15 refers to the support structure located in the middle of the fifth shaft 14. It can be implemented using a cast or welded metal block, with a through hole inside for passing through the fifth shaft 14. The lifting ring 16 refers to the ring-shaped component connecting the lifting equipment. It can be a forged steel ring fixed to the top of the upper block 15 by bolts or welding, forming a detachable connection with the crane hook.

[0054] Optionally, the clamping block 8 has a groove, and an anti-slip pad 17 is provided in the groove.

[0055] In this embodiment, in conjunction with the appendix Figure 5 and attached Figure 6 As shown, the groove refers to the inward recessed receiving structure formed by the surface of the clamping block 8, used to fix the position of the anti-slip pad 17 to prevent its displacement. The anti-slip pad 17 refers to the friction-enhancing component embedded in the groove, which can be made of rubber, polyurethane, or textured composite material, and prevents the workpiece from sliding by increasing the friction coefficient of the contact surface.

[0056] Optionally, two fixed crossbeams 1 are provided at intervals, and the movable crossbeam 2 is movably disposed between the two fixed crossbeams 1.

[0057] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0058] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A gravity-adaptive clamping and lifting device, characterized in that, include: The system comprises a fixed crossbeam (1), a movable crossbeam (2), a first boom (3), a second boom (4), a first clamping arm (5), a second clamping arm (6), and connecting rods (7). The first boom (3) is movably connected to one end of the fixed crossbeam (1) along the extension direction of the fixed crossbeam (1), and the second boom (4) is fixedly connected to the other end of the fixed crossbeam (1). Clamping blocks (8) are respectively provided at the ends of the first boom (3) and the second boom (4) away from the fixed crossbeam (1). The first clamping arm (5) and the second clamping arm (6) are arranged crosswise and hinged to each other, and are located in the middle of the fixed crossbeam (1). One end of each of the two connecting rods (7) is hinged to the ends of the first clamping arm (5) and the second clamping arm (6) away from the fixed crossbeam (1). The other end of the connecting rod (7) is hinged; the fixed crossbeam (1) is provided with a first long slot (102) and a first through hole (101) spaced apart from one end to the other end; the end of the first clamp arm (5) away from the connecting rod (7) is hinged to the first through hole (101) through the first shaft (9); the end of the second clamp arm (6) away from the connecting rod (7) is hinged to the first long slot (102) through the second shaft (10), and the second shaft (10) can move along the first long slot (102); the movable crossbeam (2) is connected to the second shaft (10) and the first boom (3) respectively; the second shaft (10) is used to drive the first boom (3) to move toward or away from the second boom (4) through the movable crossbeam (2).

2. The gravity-adaptive clamping and lifting device according to claim 1, characterized in that, A second long slot (103) is also provided at one end of the fixed crossbeam (1), and a third shaft (11) is connected to the first boom (3). The third shaft (11) passes through the second long slot (103) so that the first boom (3) can be movably connected to one end of the fixed crossbeam (1) along the extension direction of the fixed crossbeam (1).

3. The gravity-adaptive clamping and lifting device according to claim 2, characterized in that, The movable crossbeam (2) has a second through hole (201), and the third shaft (11) passes through the second through hole (201).

4. The gravity-adaptive clamping and lifting device according to claim 1, characterized in that, The fixed crossbeam (1) is also provided with a third through hole (104), and the second boom (4) is connected with a fourth shaft (12), which passes through the third through hole (104).

5. The gravity-adaptive clamping and lifting device according to claim 4, characterized in that, The movable crossbeam (2) has a third long slot (202) and the fourth shaft (12) passes through the third long slot (202).

6. The gravity-adaptive clamping and lifting device according to claim 1, characterized in that, The movable crossbeam (2) is provided with a fourth through hole (203) and a fourth long slot (204). The first shaft (9) passes through the fourth long slot (204), and the second shaft (10) passes through the fourth through hole (203).

7. The gravity-adaptive clamping and lifting device according to claim 1, characterized in that, The first boom (3) and the second boom (4) are respectively provided with windows (13), and the first boom (3) and the second boom (4) are respectively fitted onto the fixed crossbeam (1) through the windows (13).

8. The gravity-adaptive clamping and lifting device according to claim 1, characterized in that, The two connecting rods (7) are hinged together by a fifth shaft (14), and an upper top block (15) is provided on the fifth shaft (14), and a lifting ring (16) is provided on the upper top block (15).

9. The gravity-adaptive clamping and lifting device according to claim 1, characterized in that, The clamping block (8) has a groove, and an anti-slip pad (17) is provided in the groove.

10. The gravity-adaptive clamping and lifting device according to any one of claims 1 to 9, characterized in that, Two fixed crossbeams (1) are spaced apart, and the movable crossbeam (2) is movably disposed between the two fixed crossbeams (1).

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