A lifting sling for a cable crane

Abstract

The present invention discloses a lifting sling for a cable crane, comprising a lifting beam, wherein the upper end of the lifting beam is provided with a lifting lug, a guide assembly, two sets of movable assemblies, and a drive assembly provided on the lifting beam. The guide assembly and the two sets of movable assemblies are both connected to a steel cable, and the steel cable has two movable ends. The guide assembly is used to ensure that the lifting beam is evenly stressed after the steel cable lifts an object, and the movable assembly is used to connect the movable ends of the steel cable and move along the length of the lifting beam. This technical solution can drive the two sets of movable assemblies to move along the length of the lifting beam through the drive assembly. The movable assembly drives the movable ends of the steel cables to adjust the position of the steel cables relative to the basket arch so that the movable ends of the steel cables better correspond to the basket arch to be lifted, making the lifting of the basket arch more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of crane spreaders, in particular to a lifting spreader for a cable crane. Background Art

[0002] Currently, in bridge construction, the basket arch is typically connected using a hoisting device in a cable crane. However, the lateral dimensions of each segment of the basket arch vary, and the adjustability of existing hoisting devices for cable cranes needs to be improved. Adjustment based on the lateral dimensions of the basket arch is inconvenient, making it difficult to install the basket arch and limiting its use. Therefore, we propose a hoisting device for cable cranes. Summary of the Invention

[0003] The object of the present invention is to provide a lifting sling for a cable crane to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A lifting sling for a cable crane comprises a lifting beam, wherein the upper end of the lifting beam is provided with a lifting lug, a guide assembly, two sets of movable assemblies and a drive assembly provided on the lifting beam, wherein the guide assembly and the two sets of movable assemblies are connected to a steel cable, wherein the steel cable has two movable ends;

[0006] The guide assembly is used to ensure that the lifting beam is evenly stressed after the steel cable lifts the object, and the moving assembly is used to connect the movable end of the steel cable and move along the length direction of the lifting beam;

[0007] Among them, the guide assembly includes a saddle, a mounting seat and a rotation group; the saddle is provided with two groups, which are respectively fixed at the two ends of the upper surface of the hanging beam, the mounting seat is provided in the middle of the upper surface of the hanging beam, and the rotation group is provided with two groups, which are respectively vertically inserted into the two side walls of the mounting seat.

[0008] A further improvement is that each of the rotating groups includes at least three rotating columns distributed along a linear array, the steel cable is sleeved on the cable saddle, and the movable end of the steel cable passes around the inner end of the corresponding rotating group and then extends to the moving component.

[0009] A further improvement is that the moving assembly includes two groups of moving seats and a driving assembly; the driving assembly is used to drive the two groups of moving seats to move closer to or away from each other, the two groups of moving seats are respectively arranged at one end of the two side walls of the hanging beam, the two groups of moving seats are connected by a connecting frame, the side wall of the hanging beam is provided with a movable opening for accommodating the connecting frame along the length direction of the hanging beam, and the side of the moving seat away from the hanging beam is provided with two groups of rotating parts, and the moving seat is slidably arranged on the outer wall of the reinforcing protrusion, and the reinforcing protrusion is arranged on the side wall of the hanging beam and parallel to the length direction of the hanging beam.

[0010] A further improvement is that the driving assembly includes a bidirectional stud that is rotatably arranged in the inner cavity of the hanging beam and a driving member for driving the bidirectional stud to rotate; the bidirectional stud is parallel to the length direction of the hanging beam, and the connecting frames in the movable assemblies on both sides are respectively threadedly sleeved on the two ends of the outer wall of the bidirectional stud. When the bidirectional stud rotates, the two groups of connecting frames move closer to or away from each other.

[0011] A further improvement is that it also includes compensation parts, which are provided with at least two groups and are symmetrically arranged near the middle of the hanging beam. The compensation parts include guide frames respectively arranged on the outer walls of both sides of the hanging beam, moving blocks slidingly arranged in the guide frames, moving rollers rotatably arranged on the moving blocks near one end of the hanging beam, and tension springs connecting the moving blocks and the inner wall of one side of the guide frame; the moving block is connected to a pull rope, which passes through the top surface of the guide frame and is connected to a driven component. When the driving component drives the two-way stud to drive the connecting frame to move toward the middle of the hanging beam, the driven component reels in the pull rope to drive the moving block to move upward along the guide frame.

[0012] A further improvement is that a rotating part 2 is rotatably provided on the side wall of the hanging beam and located below the innermost rotating column in the rotating group, and a guide roller is also rotatably provided on the front side of the movable seat. The movable end of the steel cable successively passes around the inner end of the rotating group, the rotating part 2 and the guide roller and extends into the two groups of rotating parts 1. The part of the steel cable located between the guide roller and the rotating part 2 is a straight edge section parallel to the length direction of the hanging beam, and the movable roller is in contact with one end of the bottom of the straight edge section.

[0013] A further improvement is that the driven component includes a rotating shaft and a transmission component. The rotating shaft is provided with two groups, which are respectively arranged at the two ends of the inner cavity of the suspension beam and vertically above the bidirectional stud. The two ends of the rotating shaft respectively pass through the two sides of the suspension beam, and the pull ropes in the compensation components on both sides are respectively wound around the ends of the rotating shaft. The transmission component connects the rotating shaft and the output end of the driving component, and is used for the driving component to drive the rotating shaft to rotate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This technical solution can drive two groups of moving components to move along the length direction of the hanging beam through the driving component. The moving component drives the movable end of the steel cable and adjusts the position of the steel cable corresponding to the basket arch so that the movable end of the steel cable can better correspond to the basket arch to be hoisted, making it more convenient to hoist the basket arch. At the same time, the steel cable is connected to the hanging beam by a guide component. No matter what position the movable end of the steel cable is in, after the steel cable is connected to the basket arch to be hoisted, the pressure transmitted to the steel cable by the basket arch to be hoisted can be evenly transmitted to the hanging beam through the guide component, so that the hanging beam is evenly stressed and less prone to local deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the steel cable in use according to the present invention;

[0018] Figure 3 This is a schematic diagram of the drive assembly structure of the present invention.

[0019] In the figure: 1. Lifting beam; 2. Lifting eye; 3. Cable saddle; 4. Mounting seat; 5. Rotating group; 6. Moving seat; 7. Rotating part 1; 8. Transmission part; 9. Movable opening; 10. Steel cable; 101. Movable end; 11. Bidirectional stud; 12. Rotating shaft; 13. Rotating part 2; 14. Reinforced convex plate; 15. Guide frame; 16. Pull rope; 17. Moving roller; 18. Tension spring; 19. Driving part. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0021] Example 1

[0022] See also Figure 1-2 A lifting sling for a cable crane comprises a lifting beam 1, wherein the upper end of the lifting beam 1 is provided with a lifting lug 2 for convenient connection with an external cable crane so that the external cable crane can control the lifting sling;

[0023] The lifting device further comprises a guide assembly, two groups of movable assemblies and a drive assembly provided on the lifting beam 1. The guide assembly and the two groups of movable assemblies are connected to steel cables 10, i.e., there are two groups of steel cables 10. The steel cables 10 have two movable ends 101. The two movable ends 101 of the steel cables 10 are used to connect to the object to be hoisted, i.e., the basket arch. For example, hooks can be installed at the movable ends 101 of the steel cables 10, and the basket arch is connected via the hooks. Of course, this is not limited to this method.

[0024] The guide assembly is used to ensure that the lifting beam 1 is evenly stressed after the steel cable 10 lifts the object. Through the guide assembly, after the steel cable 10 lifts the object to be lifted, the gravity of the object can be evenly transferred to the lifting beam 1, and the lifting beam 1 will not be locally stressed, thereby effectively preventing the lifting beam 1 from being deformed or damaged.

[0025] The movable assembly is used to connect the movable end 101 of the steel cable 10 and move along the length direction of the lifting beam 1; considering that the object to be hoisted is a basket arch, the lateral dimensions of each segment of the basket arch are variable, so the movable assembly in this embodiment can adjust the movable end 101 of the steel cable 10 so that the movable end 101 of the steel cable 10 is better connected to the basket arch.

[0026] Preferably, the guide assembly of this embodiment includes a saddle 3, a mounting seat 4 and a rotating group 5;

[0027] There are two groups of saddles 3, which are respectively fixed at both ends of the upper surface of the hanging beam 1, and two groups of steel cables 10 are respectively hung on the two groups of saddles 3; the mounting seat 4 is provided in the middle of the upper surface of the hanging beam 1, and there are two groups of rotating groups 5, which are respectively vertically inserted into the two side walls of the mounting seat 4. The rotating group 5 guides the steel cable 10 and evenly transmits the pressure transmitted by the steel cable 10 downward to the hanging beam 1.

[0028] Preferably, each rotating group 5 of this embodiment includes at least three rotating columns distributed along a linear array, the rotating columns are perpendicular to the length direction of the mounting seat 4, and can be rotatably connected to the mounting seat 4 using a bearing-type structure, so that the rotating columns can rotate while not moving relative to the mounting seat 4; the steel cable 10 is sleeved on the cable saddle 3, and the movable end 101 of the steel cable 10 bypasses the inner end of the corresponding rotating group 5 and then extends to the moving component; Figure 1 It can be seen that the portion of the steel cable 10 between the saddle 3 and the innermost rotating column in the rotating group 5 is a straight section, which prevents the force transmitted by the steel cable 10 to the hanging beam 1 from being in a local position of the hanging beam 1 and causing local deformation of the hanging beam 1.

[0029] See also Figure 3 , as preferred, the moving assembly of this embodiment includes two sets of moving seats 6 and a driving assembly;

[0030] The driving assembly is used to drive the two groups of moving seats 6 to move closer to or away from each other. The two groups of moving seats 6 are respectively arranged at one end of the two side walls of the hanging beam 1, that is, the end of the front and rear outer walls. The two groups of moving seats 6 are connected by a connecting frame. The side wall of the hanging beam 1 is provided with a movable opening 9 for accommodating the connecting frame along the length direction of the hanging beam 1, and the connecting frame moves along the length direction of the hanging beam 1 in the movable opening 9; two groups of rotating parts 7 are provided on the side of the moving seat 6 away from the hanging beam 1, for example, the rotating part 7 is a rotating roller; the moving seat 6 is slidably arranged on the outer wall of the reinforcing convex plate 14, and the reinforcing convex plate 14 is provided on the side wall of the hanging beam 1 and parallel to the length direction of the hanging beam 1. On the one hand, the reinforcing convex plate 14 improves the strength of the hanging beam 1, and on the other hand, it guides the movement of the moving seat 6.

[0031] Preferably, the driving assembly of this embodiment includes a bidirectional stud 11 rotatably provided in the inner cavity of the hanging beam 1 and a driving member 19 for driving the bidirectional stud 11 to rotate;

[0032] The bidirectional stud 11 is parallel to the length direction of the suspension beam 1, and the connecting frames in the movable components on both sides are respectively threadedly sleeved on the two ends of the outer wall of the bidirectional stud 11. When the bidirectional stud 11 rotates, the two sets of connecting frames move closer to or away from each other, making it convenient to adjust the position of the movable end 101 of the steel cable 10.

[0033] Preferably, the present embodiment further comprises a compensating member, and at least two groups of compensating members are provided, symmetrically arranged near the middle of the hanging beam 1, and the compensating members include guide frames 15 respectively arranged on the outer walls of both sides of the hanging beam 1, a moving block slidably arranged in the guide frame 15, a moving roller 17 rotatably arranged at one end of the moving block close to the hanging beam 1, and a tension spring 18 connecting the moving block and the inner wall of one side of the guide frame 15;

[0034] The guide frame 15 is vertically arranged on the suspension beam 1 and is in the shape of a rectangular frame. Figure 3 It can be seen that when the moving assembly is located at the end of the side wall of the hanging beam 1, the moving block is at the lowest point in the guide frame 15; the tension spring 18 is used to drive the moving block that moves upward to return downward;

[0035] The moving block is connected to a pull rope 16, which passes through the top surface of the guide frame 15 and is connected to a driven component. When the driving member 19 drives the two-way stud 11 to drive the connecting frame to move toward the middle of the hanging beam 1, the driven component reels in the pull rope 16 to drive the moving block to move upward along the guide frame 15. Considering that when the moving seat 6 moves toward the middle of the hanging beam 1, the movable end 101 of the steel cable 10 will change (the length of the steel cable 10 below the rotating member 7 will increase), therefore, by providing a compensating member, when the driving member 19 drives the moving seat 6 to move toward the middle of the hanging beam 1, the driven component synchronously reels in the pull rope 16, thereby causing the moving block to move upward, and the moving roller 17 to lift the steel cable 10 upward, so that the position change of the movable end 101 of the steel cable 10 will not be too large, and will not affect the subsequent connection of the movable end 101 with the object to be hoisted.

[0036] As a preferred embodiment, the side wall of the hanging beam 1 of this embodiment is provided with a rotating part 2 13 located below the innermost rotating column of the rotating group 5, for example, the rotating part 2 13 is a roller body; the front side of the movable seat 6 is also provided with a guide roller, and the movable end 101 of the steel cable 10 sequentially passes around the inner end of the rotating group 5, the rotating part 2 13 and the guide roller and then extends into the two groups of rotating parts 1 7. The portion of the steel cable 10 located between the guide roller and the rotating part 2 13 is a straight edge section parallel to the length direction of the hanging beam 1, and the movable roller 17 is in contact with one end of the bottom of the straight edge section. Figure 1-2 It can be seen that when the moving block moves upward, the moving roller 17 pushes the straight edge section of the steel cable 10 upward to compensate.

[0037] Preferably, the driven component of this embodiment includes a rotating shaft 12 and a transmission member 8. The rotating shaft 12 is provided in two sets, one at each end of the inner cavity of the hanging beam 1 and vertically above the bidirectional stud 11. The two ends of the rotating shaft 12 respectively pass through the two sides of the hanging beam 1. The pull rope 16 in the compensation member on both sides is respectively wound around the end of the rotating shaft 12. The transmission member 8 connects the rotating shaft 12 and the output end of the driving member 19, and is used for the driving member 19 to drive the rotating shaft 12 to rotate. For example, the driving member 19 is a servo motor, and the driving member 19 and the bidirectional stud 11 can be connected by a worm gear structure. The rotating shaft 12 is parallel to the output end of the servo motor. The transmission member 8 is a gear set, that is, the output end of the servo motor and the rotating shaft 12 are both provided with meshing gears. It should be noted that when the bidirectional stud 11 rotates to drive the two sets of connecting frames closer to each other, the two sets of rotating shafts 12 reel in the pull rope 16; when the bidirectional stud 11 rotates to drive the two sets of connecting frames away from each other, the two sets of rotating shafts 12 unreel the pull rope 16.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lifting sling for a cable crane, comprising a lifting beam (1), wherein the upper end of the lifting beam (1) is provided with a lifting lug (2), characterized in that: It also includes a guide assembly, two groups of moving assemblies, and a driving assembly arranged on the hanging beam (1), wherein the guide assembly and the two groups of moving assemblies are connected to a steel cable (10), and the steel cable (10) has two movable ends (101); The guide assembly is used to ensure that the lifting beam (1) is evenly stressed after the steel cable (10) lifts the object, and the moving assembly is used to connect the movable end (101) of the steel cable (10) and move along the length direction of the lifting beam (1); The guide assembly includes a saddle (3), a mounting seat (4) and a rotating group (5); the saddle (3) is provided with two groups, which are respectively fixed to the two ends of the upper surface of the hanging beam (1); the mounting seat (4) is provided in the middle of the upper surface of the hanging beam (1); the rotating group (5) is provided with two groups, which are respectively vertically inserted into the two side walls of the mounting seat (4); Each of the rotating groups (5) comprises at least three rotating columns distributed along a linear array, the steel cable (10) is sleeved on the cable saddle (3), and the movable end (101) of the steel cable (10) passes around the inner end of the corresponding rotating group (5) and then extends to the moving component; The moving assembly includes two groups of moving seats (6) and a driving assembly; the driving assembly is used to drive the two groups of moving seats (6) to move closer to or away from each other, the two groups of moving seats (6) are respectively arranged at one end of the two side walls of the hanging beam (1), and the two groups of moving seats (6) are connected by a connecting frame, and the side wall of the hanging beam (1) is provided with a movable opening (9) for accommodating the connecting frame along the length direction of the hanging beam (1), and the side of the moving seat (6) away from the hanging beam (1) is provided with two groups of rotating parts (7), and the moving seat (6) is slidably arranged on the outer wall of the reinforcing convex plate (14), and the reinforcing convex plate (14) is arranged on the side wall of the hanging beam (1) and is parallel to the length direction of the hanging beam (1); The driving assembly comprises a bidirectional stud (11) rotatably arranged in the inner cavity of the hanging beam (1) and a driving member (19) for driving the bidirectional stud (11) to rotate; the bidirectional stud (11) is parallel to the length direction of the hanging beam (1), and the connecting frames in the moving assemblies on both sides are respectively threadedly sleeved on the two ends of the outer wall of the bidirectional stud (11), and when the bidirectional stud (11) rotates, the two groups of the connecting frames move closer to or away from each other; It also includes a compensating member, which is provided with at least two groups and is symmetrically arranged at a position close to the middle of the hanging beam (1). The compensating member includes a guide frame (15) respectively arranged on the outer walls of both sides of the hanging beam (1), a moving block slidingly arranged in the guide frame (15), a moving roller (17) rotatably arranged at one end of the moving block close to the hanging beam (1), and a tension spring (18) connecting the moving block and the inner wall of one side of the guide frame (15); the moving block is connected to a pull rope (16), the pull rope (16) passes through the top surface of the guide frame (15) and is connected to a driven component, and when the driving member (19) drives the bidirectional stud (11) to drive the connecting frame to move toward the middle of the hanging beam (1), the driven component reels the pull rope (16) to drive the moving block to move upward along the guide frame (15).

2. A lifting sling for a cable crane according to claim 1, characterized in that: A rotating part 2 (13) is rotatably provided on the side wall of the hanging beam (1) and is located below the innermost rotating column in the rotating group (5). A guide roller is also rotatably provided on the front side of the movable seat (6). The movable end (101) of the steel cable (10) successively passes around the inner end of the rotating group (5), the rotating part 2 (13) and the guide roller and then extends into the two groups of rotating parts 1 (7). The portion of the steel cable (10) located between the guide roller and the rotating part 2 (13) is a straight edge section parallel to the length direction of the hanging beam (1), and the movable roller (17) is in contact with one end of the bottom of the straight edge section.

3. A lifting sling for a cable crane according to claim 1, characterized in that: The driven component includes a rotating shaft (12) and a transmission component (8). The rotating shaft (12) is provided with two groups, which are respectively arranged at the two ends of the inner cavity of the hanging beam (1) and vertically located above the bidirectional stud (11). The two ends of the rotating shaft (12) respectively pass through the two sides of the hanging beam (1). The pull ropes (16) in the compensation components on both sides are respectively wound around the ends of the rotating shaft (12). The transmission component (8) connects the rotating shaft (12) and the output end of the driving component (19) and is used for the driving component (19) to drive the rotating shaft (12) to rotate.

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