Lifting appliance suitable for round steel with different lengths

Abstract

The invention discloses a round steel lifting appliance suitable for different lengths, which comprises a seat body, a clamping mechanism, an adjusting mechanism and a fixing mechanism, transverse plates are slidably connected in sliding grooves formed in the middles of the left end and the right end of the seat body, and a lifting ring is arranged in the middle of the upper end of the seat body; the clamping mechanism comprises connecting bases, sliding blocks and a transverse rod, the connecting bases are arranged at the ends, away from the center in the base, of the transverse plates correspondingly, receding grooves are formed in the front sides and the rear sides of the ends, away from the center in the base, of the two connecting bases correspondingly, and the sliding blocks are both in sliding connection with the bottom walls of the connecting bases; according to the round steel lifting appliance suitable for the different lengths, the distance between the two sets of clamping jaws can be adjusted according to the length of round steel, enough clamping force can be provided for part of light round steel, and the clamping effect on small-diameter round steel is also improved; and the safety of the round steel in the hoisting process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting equipment, in particular to a round steel hoist suitable for different lengths. Background Art

[0002] Round steel is a common steel material with a round cross section, a smooth surface and a uniform diameter. Round steel is widely used in many fields such as construction, machinery manufacturing, automobile manufacturing, shipbuilding, bridge construction, etc. Round steel slings suitable for different lengths are tools specially designed for hoisting and carrying round steel, which improves the efficiency and safety of round steel hoisting. In the prior art: the patent with authorization publication number CN 219860134 U discloses a large-diameter metal bar sling, including a lifting ring, an upper beam, a pull arm plate, a middle shaft, a lower shaft, an opening and closing rod, a clamp claw, and a protective pad. The arm plates are respectively placed on both sides of the sling beam, and the sling beam and the arm plates are connected by an upper shaft, the wall plates are connected to the claws, and the opening and closing rods can control the opening and closing of the claws when the sling is lifting. Although the device can drive the arm rods to tighten the claws and clamp the objects through gravity during use, for lighter objects, gravity may not be enough to provide sufficient clamping force, causing the objects to slide or loosen during the lifting process. Since the spacing between the two sets of claws is fixed, when moving longer objects later, the shorter spacing may cause the center of gravity of the object to be concentrated between the claws, which is easy to swing or tilt during the lifting process, reducing the stability of the lifting. When the diameter of the object is smaller than the diameter of the claws or the gap between the two sets of claws, the claws cannot fit tightly against the surface of the object, resulting in insufficient clamping force on the object, and finally reducing the safety of the lifting work. For this reason, we propose a round steel sling suitable for different lengths. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a round steel hoist suitable for different lengths, which can provide sufficient clamping force for some lighter round steels, and can adjust the distance between the two sets of jaws according to the length of the round steel, thereby improving the clamping effect of small diameter round steels, solving the problem of sliding or loosening of small diameter round steels during the hoisting process, increasing the safety of the round steel during the hoisting process, and can effectively solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a round steel hanger suitable for different lengths, comprising a seat body, a slide groove opened in the middle of the left and right ends of the seat body is slidably connected with a cross plate, a lifting ring is arranged in the middle of the upper end of the seat body, and also comprises a clamping mechanism, an adjusting mechanism and a fixing mechanism; Clamping mechanism: It includes a connecting seat, a slider and a cross bar. The connecting seats are respectively arranged at one end of the cross plate away from the inner center of the base. Avoidance grooves are respectively arranged on the front and rear sides of one end of the two connecting seats away from the inner center of the base. The sliders are slidably connected to the bottom wall of the connecting seat. The ends of the sliders away from the inner center of the base are respectively arranged with cross bars, and the cross bars are respectively located inside the avoidance grooves adjacent to each other in the transverse direction. Adjustment mechanism: it is arranged inside the seat body; Fixing mechanism: It is arranged at the lower end of the base body, and can provide sufficient clamping force for some lighter round steels. The distance between the two sets of clamping jaws can be adjusted according to the length of the round steel, thereby improving the clamping effect of small-diameter round steels, solving the problem of sliding or loosening of small-diameter round steels during lifting, and increasing the safety of round steels during lifting.

[0005] Furthermore, it also includes a control switch group, which is located outside the base body, and the input end of the control switch group is electrically connected to the external power supply, so as to be able to regulate the electrical components inside the device.

[0006] Furthermore, the clamping mechanism also includes a fixed seat, a mounting rod and a clamping claw. The fixed seat is arranged in the middle of the lower end of the connecting seat, and a mounting rod is arranged at the end of the connecting seat away from the inner center of the seat body. Clamping claws are respectively arranged in the middle of the outer arc surface of the mounting rod, and limiting grooves are respectively arranged on the upper side of the right end of the clamping claw. The ends of the four cross bars away from the inner center of the seat body are respectively located inside the laterally adjacent limiting grooves, which can clamp and fix the round steel.

[0007] Furthermore, the clamping mechanism also includes a bidirectional screw 1, which is rotatably connected to the inside of the connecting seat. Two longitudinally adjacent sliding blocks are respectively threadedly connected to the front and rear sides of the outer arc surface of the bidirectional screw 1 through threaded holes set in the middle of their front ends, and the cross bar can be driven to move through the sliding blocks.

[0008] Furthermore, a motor is provided at the front end of the connecting seat, and the rear end of the motor output shaft is fixedly connected to the front end of the bidirectional screw rod 1. The input end of the motor is electrically connected to the output end of the control switch group, and the slider can be driven to move through the bidirectional screw rod 1.

[0009] Furthermore, the adjustment mechanism includes a vertical pole, a center wheel, an adjustment rod and a mounting plate. The vertical pole is rotatably connected to the middle part of the bottom wall of the base body. A center wheel is provided on the upper side of the outer arc surface of the vertical pole. An adjustment rod is provided on both sides of the upper end of the center wheel. The two mounting plates are respectively arranged at one end of the horizontal plate close to the inner center of the base. The lower end of the mounting plate is respectively provided with adjustment grooves. The upper ends of the two adjustment rods are respectively located inside the vertically adjacent adjustment grooves, so as to adjust the distance between two laterally adjacent clamping jaws.

[0010] Furthermore, the adjustment mechanism also includes a worm wheel and a worm, the worm wheel is arranged on the lower side of the outer arc surface of the vertical rod, and the worm is rotatably connected to the lower side of the front wall of the seat body. The worm wheel and the worm are meshingly connected and can drive the center wheel to rotate through the vertical rod.

[0011] Furthermore, an adjusting motor is arranged on the right side of the front end of the seat body, the rear end of the adjusting motor output shaft is fixedly connected to the front end of the worm, the input end of the adjusting motor is electrically connected to the output end of the control switch group, and the worm gear can be driven to rotate through the worm.

[0012] Further, the fixing mechanism includes an installation box, a fixing plate, a connecting plate, a pressing plate, a mounting seat, an adjusting seat and a transmission rod, the installation box is arranged in the middle of the lower end of the seat body, a connecting plate is slidably connected in the installation groove opened in the middle of the lower end of the installation box, a pressing plate is arranged at the lower end of the connecting plate, a fixing plate is arranged at the upper end of the connecting plate, a mounting seat is arranged at the middle of the upper end of the fixing plate, the adjusting seats are slidably connected to the top wall of the installation box, the lower ends of the two adjusting seats are rotatably connected to the transmission rod, the lower ends of the transmission rods are rotatably connected to the upper ends of the mounting seats, and the outer surface of the round steel can be tightly attached to the inner arc surface of the clamping claw; Furthermore, the fixing mechanism also includes a bidirectional screw rod 2 and a driving motor. The bidirectional screw rod 2 is rotatably connected to the upper side of the inside of the installation box. The two adjustment seats are threadedly connected to the front and rear sides of the outer arc surface of the bidirectional screw rod 2 through adjustment threaded holes opened on the upper side of the front end thereof. A driving motor is arranged on the upper side of the rear end of the installation box. The front end of the output shaft of the driving motor is fixedly connected to the rear end of the bidirectional screw rod 2. The input end of the driving motor is electrically connected to the output end of the control switch group, and the adjusting seat can be driven to move through the bidirectional screw rod 2.

[0013] Compared with the prior art, the invention has the following advantages: 1. It can drive the clamp to rotate, so as to clamp and fix the round steel through the clamp. It can also provide sufficient clamping force for some lighter round steels, thus improving the safety of the round steel during the lifting process. It can be applied to round steels of different specifications.

[0014] 2. The position of the clamping jaws can be adjusted to suit round steels of different lengths. When moving round steels with longer lengths, the longer spacing can distribute the weight of the round steel more evenly between the two sets of clamping jaws, reducing the load on a single clamping jaw and improving the overall stability. The longer spacing helps to lower the center of gravity of the round steel during the lifting process, solving the problem of swinging or tilting of the round steel due to unstable center of gravity.

[0015] 3. In the process of moving small diameter round steel, the outer surface of the round steel can be pressed against the inner arc surface of the clamping jaws, which further improves the clamping effect of the small diameter round steel, solves the problem of sliding or loosening of the small diameter round steel during lifting, and protects the safety of operators and surrounding personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the clamping mechanism of the present invention; Figure 3 It is a structural schematic diagram of the regulating mechanism of the present invention; Figure 4 It is a structural schematic diagram of the fixing mechanism of the present invention.

[0017] In the figure: 1 seat body, 2 control switch group, 3 cross plate, 4 clamping mechanism, 41 fixed seat, 42 mounting rod, 43 clamping claw, 44 connecting seat, 45 slider, 46 cross bar, 47 two-way screw rod 1, 48 avoidance groove, 5 adjustment mechanism, 51 vertical rod, 52 center wheel, 53 adjustment rod, 54 mounting plate, 55 worm wheel, 56 worm, 6 fixing mechanism, 61 mounting box, 62 fixing plate, 63 connecting plate, 64 pressure plate, 65 mounting seat, 66 adjustment seat, 67 transmission rod, 68 two-way screw rod 2, 69 driving motor, 7 motor, 8 adjustment motor, 9 lifting ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 4 , this embodiment provides a technical solution: a round steel sling suitable for different lengths, including a base body 1, a horizontal plate 3 is slidably connected in the slide grooves opened in the middle of the left and right ends of the base body 1, a lifting ring 9 is provided in the middle of the upper end of the base body 1, and also includes a clamping mechanism 4, an adjusting mechanism 5 and a fixing mechanism 6; The clamping mechanism 4 includes a connecting seat 44, a slider 45 and a cross bar 46. The connecting seats 44 are respectively arranged at one end of the cross plate 3 away from the inner center of the base 1. The front and rear sides of the ends of the two connecting seats 44 away from the inner center of the base 1 are respectively provided with avoidance grooves 48. The sliders 45 are slidably connected to the bottom wall of the connecting seat 44. The ends of the sliders 45 away from the inner center of the base 1 are respectively provided with cross bars 46. The cross bars 46 are respectively located inside the laterally adjacent avoidance grooves 48. The clamping mechanism 4 also includes a fixed seat 41, a mounting rod 42 and a clamping claw 43. The fixed seat 41 is arranged in the middle of the lower end of the connecting seat 44. The ends of the connecting seat 44 away from the inner center of the seat body 1 are provided with mounting rods 42. The outer arc of the mounting rod 42 The middle part of the surface is respectively provided with a clamping claw 43, and the upper side of the right end of the clamping claw 43 is respectively provided with a limit groove, and the ends of the four cross bars 46 away from the inner center of the seat body 1 are respectively located inside the limit grooves adjacent to each other in the transverse direction. The clamping mechanism 4 also includes a bidirectional screw rod 47, and the bidirectional screw rod 47 is rotatably connected to the inside of the connecting seat 44. The two longitudinally adjacent sliders 45 are respectively threadedly connected to the front and rear sides of the outer arc surface of the bidirectional screw rod 47 through the threaded holes provided in the middle part of the front end thereof, which can drive the clamping claw 43 to rotate, so as to clamp and fix the round steel through the clamping claw 43, and can provide sufficient clamping force for some light round steel, thereby improving the safety of the round steel during the hoisting process, and can be applicable to round steel of different specifications; Adjustment mechanism 5: It is arranged inside the base body 1. The adjustment mechanism 5 includes a vertical rod 51, a center wheel 52, an adjustment rod 53 and a mounting plate 54. The vertical rod 51 is rotatably connected to the middle part of the bottom wall of the base body 1. The center wheel 52 is arranged on the upper side of the outer arc surface of the vertical rod 51. An adjustment rod 53 is arranged on both sides of the upper end of the center wheel 52. Two mounting plates 54 are respectively arranged at one end of the horizontal plate 3 close to the inner center of the base 1. The lower end of the mounting plate 54 is respectively provided with an adjustment groove. The upper ends of the two adjustment rods 53 are respectively located inside the vertically adjacent adjustment grooves. The adjustment mechanism 5 also includes a worm gear 55 and a worm 56, the worm wheel 55 is arranged on the lower side of the outer arc surface of the vertical rod 51, the worm 56 is rotatably connected to the lower side of the front wall of the seat body 1, the worm wheel 55 and the worm 56 are meshed and connected, and the position of the clamping jaw 43 can be adjusted, so as to be suitable for round steels of different lengths. When moving round steels of longer lengths, the longer spacing can distribute the weight of the round steel more evenly between the two groups of clamping jaws 43, reduce the load of a single clamping jaw 43, and improve the overall stability. The longer spacing helps to lower the center of gravity of the round steel during the hoisting process, and solves the problem of swinging or tilting of the round steel due to unstable center of gravity; The fixing mechanism 6 is arranged at the lower end of the seat body 1. The fixing mechanism 6 includes an installation box 61, a fixing plate 62, a connecting plate 63, a pressing plate 64, a mounting seat 65, an adjusting seat 66 and a transmission rod 67. The installation box 61 is arranged in the middle of the lower end of the seat body 1. The connecting plate 63 is slidably connected in the installation groove opened in the middle of the lower end of the installation box 61. The lower end of the connecting plate 63 is provided with a pressing plate 64. The upper end of the connecting plate 63 is provided with a fixing plate 62. The middle part of the upper end of the fixing plate 62 is provided with a mounting seat 65. The adjusting seats 66 are slidably connected to the top wall of the installation box 61. The lower ends of the two adjusting seats 66 are rotatably connected to the transmission rod 67. The lower ends of the transmission rod 67 are rotatably connected to the upper end of the mounting seat 65. The fixing mechanism 6 also includes a two-way screw rod. 68 and a driving motor 69, the bidirectional screw 68 is rotatably connected to the upper side of the inside of the installation box 61, and the two adjustment seats 66 are threadedly connected to the front and rear sides of the outer arc surface of the bidirectional screw 68 through the adjustment threaded holes opened on the upper side of the front end thereof. A driving motor 69 is arranged on the upper side of the rear end of the installation box 61, and the front end of the output shaft of the driving motor 69 is fixedly connected to the rear end of the bidirectional screw 68, and the input end of the driving motor 69 is electrically connected to the output end of the control switch group 2. In the process of moving the small-diameter round steel, the outer surface of the round steel can be tightly attached to the inner arc surface of the clamp 43, thereby further improving the clamping effect of the small-diameter round steel, solving the problem of sliding or loosening of the small-diameter round steel during the lifting process, and protecting the safety of the operator and surrounding personnel.

[0020] Among them: it also includes a control switch group 2, which is located outside the base body 1, and the input end of the control switch group 2 is electrically connected to the external power supply, which can regulate the electrical components inside the device.

[0021] Among them: the front end of the connecting seat 44 is provided with a motor 7, the rear end of the output shaft of the motor 7 is fixedly connected to the front end of the bidirectional screw 47, the input end of the motor 7 is electrically connected to the output end of the control switch group 2, and the motor 7 starts to run through the regulation of the control switch group 2, and the output shaft of the motor 7 drives the bidirectional screw 47 to rotate. During the rotation process, the bidirectional screw 47 will drive the slider 45 to move to the side close to the inner center of the seat body 1 through the threaded connection.

[0022] Among them: an adjusting motor 8 is arranged on the right side of the front end of the seat body 1, the rear end of the output shaft of the adjusting motor 8 is fixedly connected to the front end of the worm 56, the input end of the adjusting motor 8 is electrically connected to the output end of the control switch group 2, and the adjusting motor 8 starts to run through the regulation of the control switch group 2, and the output shaft of the adjusting motor 8 drives the worm 56 to rotate, and the worm 56 drives the worm wheel 55 to rotate through the meshing connection during the rotation process.

[0023] The working principle of a round steel sling suitable for different lengths provided by the present invention is as follows: in the process of using the round steel sling suitable for different lengths, the traction device outside the lifting ring 9 is first docked, and then the external traction device moves the round steel sling suitable for different lengths to the designated work location through the lifting ring 9, and then the adjustment motor 8 starts to run through the control of the control switch group 2, and the output shaft of the adjustment motor 8 drives the worm 56 to rotate. During the rotation process, the worm 56 drives the worm wheel 55 to rotate through the meshing connection. During the rotation process, the worm wheel 55 drives the center wheel 52 to rotate through the vertical rod 51, and the center wheel 52 drives the adjusting rod 53 to rotate, and the center wheel 52 and the adjusting rod 53 are connected. 3 do not coincide, and during the rotation of the adjusting rod 53, the adjusting rod 53 will slide inside the adjusting slot and rotate relative to the adjusting slot, so that the center wheel 52 drives the mounting plate 54 to move through the adjusting rod 53, and the mounting plate 54 drives the connecting seat 44 to move through the cross plate 3. At this time, the distance between the two adjacent clamping jaws 43 in the horizontal direction will gradually increase, so as to adjust the position of the clamping jaws 43 according to the length of the round steel, and then the clamping jaws 43 will be driven downward by the external traction equipment. When the round steel is located between the two adjacent clamping jaws 43 in the longitudinal direction, the motor 7 starts to run through the control of the control switch group 2, and the output shaft of the motor 7 drives the bidirectional screw 47 to rotate, and the bidirectional screw During the rotation, the slider 47 will drive the slider 45 to move to the side close to the inner center of the seat body 1 through the threaded connection. During the movement of the slider 45, the cross bar 46 will slide inside the limit groove and rotate relative to the limit groove, so that the slider 45 drives the two clamping jaws 43 to rotate inwardly with the mounting rod 42 as the center through the cross bar 46. At this time, the distance between the two clamping jaws 43 gradually decreases, and finally the round steel is clamped and fixed. When the diameter of the round steel is smaller than the diameter of the clamping jaws 43 or the gap between the two groups of clamping jaws 43, when the clamping jaws 43 clamp the round steel with a small diameter, the drive motor 69 starts to run through the control of the control switch group 2, and the output shaft of the drive motor 69 drives the two clamping jaws 43 to rotate inwardly with the mounting rod 42 as the center. The bidirectional screw rod 68 rotates, and the bidirectional screw rod 68 drives the adjustment seat 66 to move through the threaded connection during the rotation. At this time, the distance between the adjustment seats 66 will gradually decrease. The adjustment seat 66 will give a downward thrust to the mounting seat 65 through the transmission rod 67 during the movement, so that the mounting seat 65 drives the connecting plate 63 to move downward through the fixing plate 62, and the connecting plate 63 drives the pressing plate 64 to move downward, thereby applying a downward pressure to the small-diameter round steel through the pressing plate 64, so that the outer surface of the small-diameter round steel is tightly attached to the inner arc surface of the clamp 43, and finally the external traction equipment drives the round steel to move through the round steel sling suitable for different lengths.

[0024] It is worth noting that the motor 7 disclosed in the above embodiment can be selected from 5IK200A-AF, the drive motor 69 and the adjustment motor 8 can be selected from ECMA-C20604RS, and the control switch group 2 is provided with control buttons corresponding to the drive motor 69, the motor 7 and the adjustment motor 8 for controlling their switches.

[0025] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A round steel lifting device suitable for different lengths, comprising a base (1), wherein a horizontal plate (3) is slidably connected in a slide groove provided in the middle of the left and right ends of the base (1), and a lifting ring (9) is provided in the middle of the upper end of the base (1), characterized in that: It also includes a clamping mechanism (4), an adjusting mechanism (5) and a fixing mechanism (6); The clamping mechanism (4) comprises a connecting seat (44), a sliding block (45) and a cross bar (46), wherein the connecting seats (44) are respectively arranged at one end of the horizontal plate (3) away from the inner center of the base (1), and avoidance grooves (48) are respectively arranged on the front and rear sides of the ends of the two connecting seats (44) away from the inner center of the base (1), and the sliding blocks (45) are slidably connected to the bottom wall of the connecting seat (44), and the ends of the sliding blocks (45) away from the inner center of the base (1) are respectively arranged with cross bars (46), and the cross bars (46) are respectively located inside the avoidance grooves (48) adjacent to each other in the transverse direction; Adjustment mechanism (5): arranged inside the seat body (1); Fixing mechanism (6): It is arranged at the lower end of the seat body (1).

2. The round steel sling suitable for different lengths according to claim 1, characterized in that: It also comprises a control switch group (2), wherein the control switch group (2) is located outside the base body (1), and an input end of the control switch group (2) is electrically connected to an external power supply.

3. The round steel sling suitable for different lengths according to claim 1, characterized in that: The clamping mechanism (4) further comprises a fixing seat (41), a mounting rod (42) and a clamping claw (43), wherein the fixing seat (41) is arranged at the middle of the lower end of the connecting seat (44), the end of the connecting seat (44) away from the inner center of the seat body (1) is provided with a mounting rod (42), the middle of the outer arc surface of the mounting rod (42) is provided with a clamping claw (43), and the upper side of the right end of the clamping claw (43) is provided with a limiting groove, and the ends of the four cross bars (46) away from the inner center of the seat body (1) are respectively located inside the laterally adjacent limiting grooves.

4. The round steel sling suitable for different lengths according to claim 2, characterized in that: The clamping mechanism (4) further comprises a bidirectional screw rod (47), wherein the bidirectional screw rod (47) is rotatably connected to the interior of the connecting seat (44), and two longitudinally adjacent sliding blocks (45) are respectively threadedly connected to the front and rear sides of the outer arc surface of the bidirectional screw rod (47) through threaded holes provided in the middle of their front ends.

5. The round steel sling suitable for different lengths according to claim 4, characterized in that: The front end of each connection seat (44) is provided with a motor (7), the rear end of the output shaft of the motor (7) is fixedly connected to the front end of the bidirectional screw rod (47), and the input end of the motor (7) is electrically connected to the output end of the control switch group (2).

6. The round steel sling suitable for different lengths according to claim 2, characterized in that: The adjustment mechanism (5) comprises a vertical rod (51), a center wheel (52), an adjustment rod (53) and a mounting plate (54); the vertical rod (51) is rotatably connected to the middle part of the bottom wall of the base body (1); a center wheel (52) is provided on the upper side of the outer arc surface of the vertical rod (51); an adjustment rod (53) is provided on both sides of the upper end of the center wheel (52); two mounting plates (54) are respectively arranged at one end of the horizontal plate (3) close to the inner center of the base (1); the lower ends of the mounting plates (54) are respectively provided with adjustment slots; and the upper ends of the two adjustment rods (53) are respectively located inside the vertically adjacent adjustment slots.

7. The round steel sling suitable for different lengths according to claim 6, characterized in that: The adjustment mechanism (5) further comprises a worm wheel (55) and a worm (56); the worm wheel (55) is arranged on the lower side of the outer arc surface of the vertical rod (51); the worm (56) is rotatably connected to the lower side of the front wall of the seat body (1); and the worm wheel (55) and the worm (56) are meshingly connected.

8. The round steel sling suitable for different lengths according to claim 7, characterized in that: An adjusting motor (8) is arranged on the right side of the front end of the seat body (1); the rear end of the output shaft of the adjusting motor (8) is fixedly connected to the front end of the worm (56); and the input end of the adjusting motor (8) is electrically connected to the output end of the control switch group (2).

9. The round steel sling applicable to different lengths according to claim 2, characterized in that: The fixing mechanism (6) comprises an installation box (61), a fixing plate (62), a connecting plate (63), a pressing plate (64), a mounting seat (65), an adjusting seat (66) and a transmission rod (67). The installation box (61) is arranged at the middle of the lower end of the seat body (1). The connecting plate (63) is slidably connected in an installation groove opened in the middle of the lower end of the installation box (61). The lower end of the connecting plate (63) is provided with a pressing plate (64). The upper end of the connecting plate (63) is provided with a fixing plate (62). The middle of the upper end of the fixing plate (62) is provided with a mounting seat (65). The adjusting seats (66) are slidably connected to the top wall of the installation box (61). The lower ends of the two adjusting seats (66) are rotatably connected to the transmission rod (67). The lower ends of the transmission rod (67) are rotatably connected to the upper end of the installation seat (65).

10. The round steel sling suitable for different lengths according to claim 9, characterized in that: The fixing mechanism (6) further comprises a second bidirectional screw rod (68) and a driving motor (69); the second bidirectional screw rod (68) is rotatably connected to the upper side of the interior of the installation box (61); the two adjustment seats (66) are both threadedly connected to the front and rear sides of the outer arc surface of the second bidirectional screw rod (68) through adjustment threaded holes provided on the upper sides of the front ends thereof; a driving motor (69) is provided on the upper side of the rear end of the installation box (61); the front end of the output shaft of the driving motor (69) is fixedly connected to the rear end of the second bidirectional screw rod (68); and the input end of the driving motor (69) is electrically connected to the output end of the control switch group (2).

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