Steel bracket spreader

Abstract

The utility model discloses a kind of steel bracket lifting appliance, comprising: upper crossbeam, clamping mechanism for clamping steel roll bracket and for the clamping mechanism is switched from horizontal state to inclined state by tilting mechanism;Two clamping mechanisms are respectively arranged at the two ends of the upper crossbeam, and the upper crossbeam is connected with clamping mechanism by tilting mechanism. By being connected with clamping mechanism by the tilting mechanism of being set at the two ends of upper crossbeam, make tilting mechanism drive clamping mechanism change from horizontal state to inclined state, and then make the steel roll bracket clamped by clamping mechanism tilt, so that steel roll bracket can be inclined into compartment, so that the distance between steel roll bracket and compartment in horizontal direction increases, in this way, when lifting steel roll bracket, it can be placed more easily in compartment, and the situation that it is stuck or bumped at the opening of compartment top can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a steel bracket lifting equipment. Background Technology

[0002] Most steel coils produced by steel mills need to be transported to various locations by rail. Due to process requirements, steel coils must be shipped horizontally. To ensure stability and safety during transportation, special steel coil racks must be placed in the car before loading the steel coils.

[0003] The loading and unloading of steel coil supports mainly relies on steel coil lifting equipment. In actual lifting operations, the following problems exist: the width of the steel coil support is almost the same as the truck bed, making it difficult to accurately place it into the truck bed during lifting, often resulting in it getting stuck or bumping into openings in the truck bed's roof. Although the unmanned aerial vehicle (UAV) above the steel coil lifting equipment can adjust its position, its precision limitations cannot effectively solve this problem, while manual alignment is both dangerous and inefficient. Summary of the Invention

[0004] This utility model provides a steel bracket lifting device to overcome the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A steel bracket lifting device includes: an upper crossbeam, a clamping mechanism for clamping a steel coil bracket, and a tilting mechanism for switching the clamping mechanism from a horizontal state to an inclined state.

[0007] The two clamping mechanisms are respectively disposed at both ends of the upper crossbeam, and the upper crossbeam is connected to the clamping mechanisms through a tilting mechanism.

[0008] Furthermore, the clamping mechanism includes a housing;

[0009] The tilting mechanism includes a tilting support, a first connecting rod, a second connecting rod, and a tilting cylinder, wherein the tilting support is fixed on the upper crossbeam;

[0010] The first connecting rod, the second connecting rod, and the tilting cylinder are inclinedly arranged between the tilting support and the housing. The two ends of the tilting cylinder are respectively hinged to the tilting support and the housing. The two ends of the first connecting rod are respectively rotatably connected to the tilting support and the housing. The two ends of the second connecting rod are respectively rotatably connected to the tilting support and the housing.

[0011] Furthermore, the top of the upper crossbeam is equipped with a first motor and a second motor. Two upper crossbeam slide plates are slidably connected inside the upper crossbeam via an upper crossbeam slide rail. One of the upper crossbeam slide plates is equipped with a first rack that meshes with the output shaft gear of the first motor, and the other upper crossbeam slide plate is equipped with a second rack that meshes with the output shaft gear of the second motor. The upper crossbeam slide plates are fixedly connected to the tilting support.

[0012] Furthermore, a rotating shaft is rotatably connected inside the housing, and a gear is fitted on the rotating shaft. Two sliding plates are slidably connected inside the housing via a slide rail. The gear is located between the two sliding plates. A rack that meshes with the gear is provided on the sliding plate. A clamping arm is fixed on the sliding plate, and a clamping claw is fixed at the bottom of the clamping arm. The tops of the two clamping arms are connected by a clamping hydraulic cylinder.

[0013] Furthermore, it also includes a lower crossbeam, wherein the upper crossbeam and the lower crossbeam are fixedly connected in a cross shape, and positioning devices are provided at both ends of the lower crossbeam.

[0014] Furthermore, the upper crossbeam is provided with a rotary mechanism to drive its rotation.

[0015] Furthermore, the rotary mechanism includes a bracket, on which a hanging shaft is provided, and a motor is provided on the side of the bracket. A drive gear is provided on the output shaft of the motor. A driven gear that meshes with the drive gear is rotatably connected to the bottom of the bracket. A connecting frame is fixed to the bottom of the driven gear, and the connecting frame is fixedly connected to the upper crossbeam.

[0016] Furthermore, the positioning device includes fixed brackets fixed to both ends of the lower crossbeam. The fixed brackets are equipped with positioning cylinders and movable brackets. The top of the positioning cylinder is fixedly connected to the fixed bracket, the movable bracket is slidably connected to the fixed bracket, and the bottom of the positioning cylinder is connected to the movable bracket.

[0017] Furthermore, multiple jaws are fixed to the outer periphery of the bottom of the clamp arm.

[0018] Furthermore, the movable bracket has sliding grooves on both sides, and the fixed bracket has guide wheels on its inner side, with the guide wheels placed in the sliding grooves.

[0019] Beneficial effects:

[0020] This utility model provides a steel coil support lifting device. The tilting mechanism and clamping mechanism are connected at both ends of the upper crossbeam. The tilting mechanism drives the clamping mechanism to change from a horizontal state to an inclined state, thereby tilting the steel coil support held by the clamping mechanism. This allows the steel coil support to enter the carriage at an incline, increasing the horizontal distance between the steel coil support and the carriage. As a result, the steel coil support can be placed more easily in the carriage when it is being lifted, effectively avoiding jamming or collision at the opening at the top of the carriage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the horizontal state of a steel bracket lifting device disclosed in this utility model;

[0023] Figure 2 This is a schematic diagram of the inclined state of a steel bracket lifting device disclosed in this utility model;

[0024] Figure 3 This is a front view schematic diagram of a steel bracket lifting device disclosed in this utility model;

[0025] Figure 4 for Figure 3 BB section view;

[0026] Figure 5 for Figure 3 FF sectional view;

[0027] Figure 6 This is a side view schematic diagram of a steel bracket lifting device disclosed in this utility model;

[0028] Figure 7 for Figure 6 Enlarged view of point A;

[0029] Figure 8 for Figure 6 DD sectional view;

[0030] Figure 9 for Figure 8 Enlarged view of point E;

[0031] Figure 10 for Figure 6 CC section view;

[0032] Figure 11 for Figure 10 Enlarged schematic diagram at point G;

[0033] Figure 12 This is a schematic diagram of the slewing mechanism of a steel bracket lifting device disclosed in this utility model;

[0034] Figure 13 This is a cross-sectional schematic diagram of a positioning device for a steel bracket lifting device disclosed in this utility model;

[0035] Figure 14 This utility model discloses a schematic diagram illustrating the coordination between a steel bracket lifting device and a car body when lifting a steel coil bracket. Figure 1 ;

[0036] Figure 15 This utility model discloses a schematic diagram illustrating the coordination between a steel bracket lifting device and a car body when lifting a steel coil bracket. Figure 2 ;

[0037] Figure 16 This utility model discloses a schematic diagram illustrating the coordination between a steel bracket lifting device and a car body when lifting a steel coil bracket. Figure 3 ;

[0038] Figure 17 This is a schematic diagram of the structure of a steel bracket lifting device for hoisting a single Q3 steel coil bracket disclosed in this utility model;

[0039] Figure 18 This is a front view schematic diagram of a steel bracket lifting device for lifting a single Q3 steel coil bracket disclosed in this utility model;

[0040] Figure 19 for Figure 18 Enlarged view of point H;

[0041] Figure 20 This is a schematic diagram of the structure of a steel bracket lifting device for hoisting multiple Q3 steel coil brackets disclosed in this utility model;

[0042] Figure 21 This is a front view schematic diagram of a steel bracket lifting device for hoisting multiple Q3 steel coil brackets disclosed in this utility model;

[0043] Figure 22 This is a schematic diagram of the structure of a steel bracket lifting device for hoisting a single QD steel coil bracket disclosed in this utility model;

[0044] Figure 23 This is a front view schematic diagram of a steel bracket lifting device for hoisting a single QD steel coil bracket disclosed in this utility model;

[0045] Figure 24 for Figure 23 Enlarged schematic diagram at point J;

[0046] Figure 25 This is a schematic diagram of the structure of a steel bracket lifting device for hoisting multiple QD steel coil brackets disclosed in this utility model;

[0047] Figure 26 This is a front view schematic diagram of a steel bracket lifting device for hoisting multiple QD steel coil brackets disclosed in this utility model;

[0048] Figure 27 for Figure 26 Enlarged schematic diagram at point K.

[0049] In the picture:

[0050] 1. Rotary mechanism; 11. Support frame; 12. Motor; 13. Drive gear; 14. Driven gear; 15. Connecting frame;

[0051] 2. Lower crossbeam;

[0052] 3. Upper crossbeam; 31. First motor; 32. Second motor; 33. First rack; 34. Second rack; 35. Upper crossbeam slide plate; 36. Upper crossbeam slide rail;

[0053] 4. Clamping mechanism; 41. Rotary shaft; 42. Clamping cylinder; 43. Rack; 44. Clamping arm; 451. First clamping jaw; 452. Second clamping jaw; 453. Third clamping jaw; 46. Gear; 47. Housing; 48. Slide rail; 49. Slide plate;

[0054] 5. Positioning device; 51. Positioning cylinder; 52. Movable bracket; 53. Limit block; 54. Fixed bracket; 55. Guide wheel;

[0055] 6. Tilting mechanism; 61. Tilting support; 62. First connecting rod; 63. Second connecting rod; 64. Tilting cylinder;

[0056] 7. Hanging shaft;

[0057] Q, steel coil support; Q3, Q3 steel coil support; QD, QD steel coil support;

[0058] I, carriage; L, positioning block. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0060] This embodiment provides a steel bracket lifting device, such as Figure 1 and Figure 2 As shown, it includes: an upper crossbeam 3, a clamping mechanism 4 for clamping the steel coil bracket, and a tilting mechanism 6 for switching the clamping mechanism 4 from a horizontal state to an inclined state.

[0061] The two clamping mechanisms 4 are respectively disposed at both ends of the upper crossbeam 3, and the upper crossbeam 3 is connected to the clamping mechanisms 4 through the tilting mechanism 6.

[0062] like Figures 14 to 16 As shown, the steel bracket lifting device provided in this embodiment is connected to the clamping mechanism 4 through the tilting mechanism 6 set at both ends of the upper crossbeam 3. The tilting mechanism 6 drives the clamping mechanism 4 from a horizontal state to an inclined state, thereby causing the steel coil bracket Q held by the clamping mechanism 4 to tilt. This allows the steel coil bracket Q to tilt into the carriage I, increasing the horizontal distance between the steel coil bracket Q and the carriage I. In this way, when lifting the steel coil bracket Q, it can be placed more easily in the carriage I, effectively avoiding jamming or collision at the opening at the top of the carriage.

[0063] like Figures 14 to 16 As shown, in actual use, when the steel coil bracket Q is placed in the carriage I, one end of the inclined steel coil bracket Q contacts the positioning block L in the carriage I used to position the steel coil bracket Q, achieving initial positioning, and then changes from the inclined state to the horizontal state to realize the placement of the steel coil bracket Q.

[0064] Specifically, such as Figure 3 As shown, the clamping mechanism 4 includes a housing 47;

[0065] like Figure 3 As shown, the tilting mechanism 6 includes a tilting support 61, a first connecting rod 62, a second connecting rod 63, and a tilting cylinder 64. The tilting support 61 is fixed on the upper crossbeam 3.

[0066] The first connecting rod 62, the second connecting rod 63, and the tilting cylinder 64 are inclinedly arranged between the tilting support 61 and the housing 47. The two ends of the tilting cylinder 64 are respectively hinged to the tilting support 61 and the housing 47. The two ends of the first connecting rod 62 are respectively rotatably connected to the tilting support 61 and the housing 47. The two ends of the second connecting rod 63 are respectively rotatably connected to the tilting support 61 and the housing 47.

[0067] The tilting cylinder 64 extends, causing the clamping mechanism 4 to change from a horizontal state to an inclined state; conversely, the tilting cylinder 64 retracts, causing the clamping mechanism 4 to return from an inclined state to a horizontal state. The first link 62 and the second link 63 ensure the stability of the rotation of the clamping mechanism 4.

[0068] Specifically, such as Figure 5 As shown, a rotating shaft 41 is rotatably connected inside the housing 47, and a gear 46 is fixed on the rotating shaft 41, such as... Figure 5 and Figure 7 As shown, a slide rail 41 is fixed inside the housing 47. Two slide plates 49 are slidably connected to the housing 47 via the slide rail 48. The gear 46 is located between the two slide plates 49. A rack 43 that meshes with the gear 46 is provided on each slide plate 49. A clamp arm 44 is fixed on the slide plate 49, and a clamp claw is fixed at the bottom of the clamp arm 44. Figure 3 As shown, the tops of the two clamping arms 44 are connected by a clamping cylinder 42 (the two ends of the clamping cylinder 42 are respectively hinged or fixedly connected to the two clamping arms 44).

[0069] Preferably, such as Figure 4 As shown, the top of the upper crossbeam 3 is equipped with a first motor 31 and a second motor 32, as follows: Figure 9 and Figure 10 As shown, an upper crossbeam slide rail 36 is fixed inside the upper crossbeam 3. Two upper crossbeam slide plates 35 are slidably connected to the upper crossbeam 3 through the upper crossbeam slide rail 36. One of the upper crossbeam slide plates 35 is provided with a first rack 33 that meshes with the output shaft gear of the first motor 31, and the other upper crossbeam slide plate 35 is provided with a second rack 34 that meshes with the output shaft gear of the second motor 32. The two upper crossbeam slide plates 35 are respectively fixedly connected to two tilting supports 61.

[0070] In this embodiment, the first motor 31 and the second motor 32 are both right-angle geared motors with a compact structure, which can make reasonable use of the space at the top of the upper crossbeam 3. The first rack 33 and the second rack 34 are at different heights, and the positions of the output shaft gear of the first motor 31 and the output shaft gear of the second motor 32 correspond to the first rack 33 and the second rack 34, respectively.

[0071] By setting up a first motor 31 and a second motor 32, the forward and reverse rotation of the motors can cause the two tilting supports 61 to move in opposite directions, thereby changing the distance between the two clamping mechanisms 4 to adapt to steel coil brackets of different specifications; or the two tilting supports 61 can be made to move in the same direction, so that when the overhead crane is stationary above the lifting device, the two clamping mechanisms 4 can be displaced with the distance remaining unchanged, and the horizontal position can be adjusted with higher displacement accuracy.

[0072] Specifically, such as Figure 1 and Figure 2 As shown, the upper crossbeam 3 is equipped with a rotary mechanism 1 that drives its rotation, such as... Figure 12 As shown, the rotary mechanism 1 includes a support 11, such as... Figure 1 and Figure 2As shown, a lifting shaft 7 is fixedly mounted on the bracket 11. The lifting shaft 7 is used to connect the hook of the unmanned vehicle, such as... Figure 12 As shown, a motor 12 is fixedly mounted on the side of the bracket 11. A drive gear 13 is mounted on the output shaft of the motor 12. A driven gear 14 that meshes with the drive gear 13 is rotatably connected to the bottom of the bracket 11 via a rotating shaft. A connecting frame 15 is fixed to the bottom of the driven gear 14. The connecting frame 15 is fixedly connected to the upper crossbeam 3. The slewing mechanism 1 is used to adjust the angle of the lifting device and the steel coil support being lifted in the horizontal plane, which facilitates loading and unloading.

[0073] Specifically, such as Figure 1 and Figure 2 As shown, it also includes a lower crossbeam 2, and the upper crossbeam 3 and the lower crossbeam 2 are fixedly connected in a cross-shaped manner, as shown. Figure 8 As shown, positioning devices 5 are provided at both ends of the lower crossbeam 2, such as... Figure 11 and Figure 13 As shown, the positioning device 5 includes fixed brackets 54 fixed at both ends of the lower crossbeam 2. The fixed brackets 54 are equipped with a positioning cylinder 51 and a movable bracket 52. The cylinder body of the positioning cylinder 51 is fixedly connected to the fixed bracket 54, and the movable bracket 52 is slidably connected to the fixed bracket 54. The piston rod of the positioning cylinder 51 is connected to the movable bracket 52 (hinged or fixedly connected).

[0074] The positioning device 5 is used to adjust the distance between the bottom of the movable support 52 and the jaws, ensuring that when the lifting device is placed on the steel coil support, the jaws are aligned with the correct position of the steel coil support to be lifted. The positioning cylinder 51 drives the movable support 52 to descend, pressing it onto the steel coil support, thus improving the stability during lifting.

[0075] Specifically, such as Figure 13 As shown, the movable bracket 52 has sliding grooves on both sides, and the fixed bracket 54 has guide wheels 55 on the inner side. The guide wheels 55 are placed in the sliding grooves and play a guiding role. The top of the fixed bracket 54 is also fixed with a limit block 53 to prevent the guide wheels 55 from coming out of the sliding grooves.

[0076] Preferably, multiple jaws are fixed on the outer periphery of the bottom of the clamp arm 44. The lifting device disclosed in this embodiment can adjust the distance between the two clamping mechanisms 4 by the first motor 31 and the second motor 32, and can also open and close the clamp arm 44 of the clamping mechanism 4 by the clamping cylinder 42. Therefore, different forms of lifting can be achieved, and thus multiple jaws are provided.

[0077] In this embodiment, as Figure 3 and Figure 6 As shown, the bottom of the clamp arm 44 is fixed with a first clamping jaw 451, a second clamping jaw 452 and a third clamping jaw 453 to adapt to different forms of lifting;

[0078] like Figures 17 to 19 As shown, when hoisting a single Q3 steel coil bracket, the hook of the unmanned crane is hooked onto the lifting shaft 7, the clamp arm 44 is inserted into the empty slot of the Q3 steel coil bracket, the clamping cylinder 42 is activated, which drives the clamp arm 44 to move and abut against the Q3 steel coil bracket, the positioning cylinder 51 is activated, which presses the bottom of the movable bracket 52 against the top of the Q3 steel coil bracket, and the clamping cylinder 42 creates pressure between the second clamp 452 and the Q3 steel coil bracket, and the single Q3 steel coil bracket is hoisted by the friction between the second clamp 452 and the Q3 steel coil bracket;

[0079] like Figure 20 and Figure 21 As shown, when hoisting multiple Q3 steel coil brackets, the hook of the unmanned crane is hooked onto the lifting shaft 7, the clamp arm 44 is inserted into the empty slot of the Q3 steel coil bracket, the clamping cylinder 42 is activated, which drives the clamp arm 44 to move and abut against the Q3 steel coil bracket, the positioning cylinder 51 is activated, which presses the bottom of the movable bracket 52 against the top of the Q3 steel coil bracket, and the clamping cylinder 42 creates pressure between the second clamp 452 and the Q3 steel coil bracket, and the multiple Q3 steel coil brackets are hoisted by relying on the friction between the second clamp 452 and the Q3 steel coil bracket;

[0080] like Figures 22 to 24 As shown, when hoisting a single QD steel coil bracket, the hook of the unmanned crane is hooked onto the lifting shaft 7, the clamp arm 44 is inserted into the empty slot of the QD steel coil bracket, the clamping cylinder 42 is activated, which drives the clamp arm 44 to move and abut against the QD steel coil bracket, the positioning cylinder 51 is activated, which presses the bottom of the movable bracket 52 against the top of the QD steel coil bracket, the first jaw 451 supports the QD steel coil bracket, and the second jaw 452 is used to hoist a single QD steel coil bracket;

[0081] like Figures 25 to 27 As shown, when hoisting multiple QD steel coil brackets, the hook of the unmanned crane is hooked onto the lifting shaft 7, the clamp arm 44 is inserted into the empty slot of the QD steel coil bracket, the clamping cylinder 42 is activated, which drives the clamp arm 44 to move and abut against the QD steel coil bracket, the positioning cylinder 51 is activated, which presses the bottom of the movable bracket 52 against the top of the QD steel coil bracket, the first motor 31 and the second motor 32 are activated until the third jaw 453 supports the QD steel coil bracket, thereby relying on the third jaw 453 to hoist multiple QD steel coil brackets.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A steel bracket lifting device, characterized in that, include: The upper crossbeam (3), the clamping mechanism (4) for clamping the steel coil bracket, and the tilting mechanism (6) for switching the clamping mechanism (4) from a horizontal state to an inclined state; The two clamping mechanisms (4) are respectively disposed at both ends of the upper crossbeam (3), and the upper crossbeam (3) is connected to the clamping mechanisms (4) through the tilting mechanism (6).

2. The steel bracket lifting device according to claim 1, characterized in that, The clamping mechanism (4) includes a housing (47); The tilting mechanism (6) includes a tilting support (61), a first connecting rod (62), a second connecting rod (63), and a tilting cylinder (64). The tilting support (61) is fixed on the upper crossbeam (3). The first connecting rod (62), the second connecting rod (63), and the tilting cylinder (64) are inclinedly arranged between the tilting support (61) and the housing (47). The two ends of the tilting cylinder (64) are hinged to the tilting support (61) and the housing (47) respectively. The two ends of the first connecting rod (62) are rotatably connected to the tilting support (61) and the housing (47) respectively. The two ends of the second connecting rod (63) are rotatably connected to the tilting support (61) and the housing (47) respectively.

3. The steel bracket lifting device according to claim 2, characterized in that, The top of the upper crossbeam (3) is provided with a first motor (31) and a second motor (32). Two upper crossbeam slide plates (35) are slidably connected inside the upper crossbeam (3) through the upper crossbeam slide rail (36). One of the upper crossbeam slide plates (35) is provided with a first rack (33) that meshes with the output shaft gear of the first motor (31), and the other upper crossbeam slide plate (35) is provided with a second rack (34) that meshes with the output shaft gear of the second motor (32). The upper crossbeam slide plate (35) is fixedly connected to the tilting support (61).

4. The steel bracket lifting device according to claim 2, characterized in that, A rotating shaft (41) is rotatably connected inside the housing (47). A gear (46) is fitted on the rotating shaft (41). Two sliding plates (49) are slidably connected inside the housing (47) via a slide rail (48). The gear (46) is located between the two sliding plates (49). A rack (43) that meshes with the gear (46) is provided on the sliding plate (49). A clamp arm (44) is fixed on the sliding plate (49). A clamp claw is fixed at the bottom of the clamp arm (44). The tops of the two clamp arms (44) are connected by a clamping cylinder (42).

5. The steel bracket lifting device according to claim 1, characterized in that, It also includes a lower crossbeam (2), the upper crossbeam (3) and the lower crossbeam (2) are fixedly connected in a cross shape, and the two ends of the lower crossbeam (2) are provided with positioning devices (5).

6. The steel bracket lifting device according to claim 1, characterized in that, The upper crossbeam (3) is provided with a rotary mechanism (1) for driving its rotation.

7. The steel bracket lifting device according to claim 6, characterized in that, The rotary mechanism (1) includes a bracket (11), a hanging shaft (7) is provided on the bracket (11), a motor (12) is provided on the side of the bracket (11), a drive gear (13) is provided on the output shaft of the motor (12), a driven gear (14) that meshes with the drive gear (13) is rotatably connected to the bottom of the bracket (11), a connecting frame (15) is fixed to the bottom of the driven gear (14), and the connecting frame (15) is fixedly connected to the upper crossbeam (3).

8. The steel bracket lifting device according to claim 5, characterized in that, The positioning device (5) includes a fixed bracket (54) fixed at both ends of the lower crossbeam (2). The fixed bracket (54) is provided with a positioning cylinder (51) and a movable bracket (52). The top of the positioning cylinder (51) is fixedly connected to the fixed bracket (54), the movable bracket (52) is slidably connected to the fixed bracket (54), and the bottom of the positioning cylinder (51) is connected to the movable bracket (52).

9. The steel bracket lifting device according to claim 4, characterized in that, Multiple jaws are fixed to the outer periphery of the bottom of the clamp arm (44).

10. The steel bracket lifting device according to claim 8, characterized in that, The movable bracket (52) has sliding grooves on both sides, and the fixed bracket (54) has guide wheels (55) on its inner side, with the guide wheels (55) placed in the sliding grooves.

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