Lifting device of bridge erecting machine

Abstract

The invention discloses a bridge girder erection machine hoisting device which comprises a hoisting trolley and further comprises a hoisting sling arranged above the hoisting trolley, the hoisting sling comprises four force bearing rods distributed in a square shape, a first pair of force bearing rods arranged oppositely are provided with first hoisting assemblies in the transverse direction, and a second pair of force bearing rods arranged oppositely are provided with second hoisting assemblies in the transverse direction; a pair of second hoisting assemblies are arranged on the second pair of oppositely arranged bearing rods along the longitudinal direction; the top surface of the suspension lifting appliance is a suspension surface, the bottom surface of the suspension lifting appliance is provided with a lifting hook, the center of the suspension surface is connected with the first hoisting assembly, and the two transverse sides of the center of the suspension surface are connected with the pair of second hoisting assemblies. According to the invention, uniform stress on the suspension lifting appliance can be realized, each stress point lifts the suspension lifting appliance at a uniform traction speed, a lifting hook is prevented from shaking, and the safety of lifting operation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge erection machines, and more particularly to a lifting device for a bridge erection machine. Background Art

[0002] The hoisting trolley of the bridge-building machine is an important component of the bridge-building machine and is a mechanical device used to lift heavy objects. The hoisting trolley travels on the beam of the bridge-building machine via four running wheels. It can move laterally along the beam and can also be raised and lowered vertically for lifting operations. The hoisting trolley is usually equipped with a movable pulley, a fixed pulley, a wire rope and other structures to achieve the lifting of the hook. The problem is that the traction speed of the platform where the hook is located is different, or the force is uneven, etc., which causes the platform to shake, thereby reducing the safety of the lifting operation. It is precisely the above-mentioned problem that needs to be solved in this application. Summary of the Invention

[0003] The present invention provides a lifting device for a bridge erection machine, which can achieve uniform force on a suspension spreader, and each force point lifts the suspension spreader at a uniform traction speed, thereby preventing the hook from shaking and improving the safety of the lifting operation.

[0004] In order to achieve these purposes and other advantages according to the present invention, a bridge erection machine lifting device is provided, comprising a lifting trolley and further comprising:

[0005] A lifting sling is provided above the lifting trolley, the lifting sling comprising four load-bearing rods arranged in a U-shape, a first pair of load-bearing rods being arranged opposite to each other and having a first lifting assembly arranged transversely, and a second pair of load-bearing rods being arranged opposite to each other and having a pair of second lifting assemblies arranged longitudinally;

[0006] The suspension sling has a top surface as a suspension surface and a bottom surface provided with a hook, the center of the suspension surface is connected to the first lifting component, and the lateral sides of the center of the suspension surface are connected to a pair of second lifting components.

[0007] Preferably, the first lifting assembly and the second lifting assembly each include a pair of fixed rollers, a lifting roller, and a steel wire rope. The roller shafts of the pair of fixed rollers are coaxially fixed to the corresponding load-bearing rods, and the roller shaft of a lifting roller is installed on the suspension surface through a bearing seat. The middle part of the steel wire rope is wound around the lifting roller, and the two ends are wound around a pair of fixed rollers. The pair of fixed rollers rotate at the same speed and in opposite directions.

[0008] Preferably, the first pair of load-bearing rods includes the second load-bearing rod and the fourth load-bearing rod, each of which is provided with a fixed roller, and the second pair of load-bearing rods includes the first load-bearing rod and the third load-bearing rod, each of which is provided with two fixed rollers, the first load-bearing rod, the second load-bearing rod, the third load-bearing rod and the fourth load-bearing rod have the same rotation speed, the first load-bearing rod and the fourth load-bearing rod have the same direction of rotation, and the second load-bearing rod and the third load-bearing rod have the same direction of rotation.

[0009] Preferably, the second pair of load-bearing rods and the first pair of load-bearing rods are arranged at different heights, the first load-bearing rod and the third load-bearing rod have a worm portion at one end of their rod body and a first bevel gear at the other end, the second load-bearing rod and the fourth load-bearing rod have a worm portion at one end of their rod body and a driving gear at the other end, and one end of the first load-bearing rod rotates under the drive motor;

[0010] The first bearing rod and the second bearing rod are engaged with the worm gear to realize power transmission, the second bearing rod and the third bearing rod realize power transmission through the first transmission rod, the first transmission rod is parallel to the second bearing rod and the first transmission rod and the second bearing rod are arranged at different heights, the first transmission rod is coaxially provided with a second bevel gear and a driven gear, the driving gear of the second bearing rod is engaged with the driven gear of the first transmission rod, the second bevel gear of the first transmission rod is engaged with the first bevel gear of the third bearing rod, the third bearing rod and the fourth bearing rod realize power transmission through the worm gear, the fourth bearing rod and the first bearing rod realize power transmission through the second transmission rod, the second transmission rod is parallel to the fourth bearing rod and the second transmission rod and the fourth bearing rod are arranged at different heights, the second transmission rod is coaxially provided with a second bevel gear and a driven gear, the driving gear of the fourth bearing rod is engaged with the driven gear of the second transmission rod, and the second bevel gear of the second transmission rod is engaged with the first bevel gear of the first bearing rod.

[0011] Preferably, the lifting trolley is further provided with a pair of suspensions, and guide grooves are provided on the opposite sides of the pair of suspensions. Guide wheels are respectively provided on the two lateral outer sides of the suspension sling, and the guide wheels are slidably arranged in the guide grooves.

[0012] Preferably, the axle of the guide wheel is an L-shaped shaft, the horizontal rod body of the L-shaped shaft is arranged longitudinally, the guide wheel is installed on the horizontal rod body of the L-shaped shaft through a bearing, and the vertical rod body of the L-shaped shaft is provided with a tightening shaft longitudinally, and the tightening shaft rotates under the drive of the tightening motor.

[0013] The present invention has at least the following beneficial effects:

[0014] First, the present invention provides a lifting sling on the lifting trolley for installing the first lifting component and the second lifting component, thereby lifting or lowering the suspension sling, which can achieve uniform force on the suspension sling. Each force point lifts the suspension sling at a uniform traction speed, preventing the hook from shaking, and improving the safety of the lifting operation.

[0015] Second, the lifting sling is set in the space above the lifting trolley, and the suspension sling is set in the space below the lifting trolley for lifting operations. The four load-bearing rods are symmetrically distributed. The first lifting assembly is jointly set at the center of the first pair of load-bearing rods and the center of the suspension surface. The second lifting assembly is jointly set at the horizontal sides of the center of the second pair of load-bearing rods and the center of the suspension surface, so that the horizontal center line of the suspension surface is provided with three force points. The force point at the center is pulled by a horizontally distributed steel wire rope, and the two force points on both sides of the center are symmetrically pulled by a longitudinally distributed steel wire rope. The first lifting assembly and the second lifting assembly can be implemented by using drums, pulleys, sprockets, etc., which are not limited here.

[0016] Third, the first and second lifting assemblies are each wound with a steel wire rope around a first fixed roller, a lifting roller, and a second fixed roller in sequence. The fixed rollers are each mounted on a corresponding load-bearing rod, that is, the fixed rollers are rotated by driving the load-bearing rod, thereby achieving the same speed and opposite rotation of the pair of fixed rollers of the first lifting assembly, and the same speed and opposite rotation of the pair of fixed rollers of the second lifting assembly. The four load-bearing rods are the first load-bearing rod, the second load-bearing rod, the third load-bearing rod, and the fourth load-bearing rod. The first pair of load-bearing rods includes the second load-bearing rod and the fourth load-bearing rod, and the second pair of load-bearing rods includes the first load-bearing rod and the third load-bearing rod. The four load-bearing rods are driven by a motor to have the same rotation speed, the first load-bearing rod and the fourth load-bearing rod have the same direction of rotation, and the second load-bearing rod and the third load-bearing rod have the same direction of rotation, and the two have different directions, so that the first and second lifting assemblies can lift the suspension sling synchronously and at the same speed.

[0017] Fourth, the second pair of bearing rods is set higher than the first pair of bearing rods, so that the four bearing rods can realize power transmission. The shapes, specifications and sizes of the first bearing rod and the third bearing rod are consistent and set in opposite directions. The shapes, specifications and sizes of the second bearing rod and the fourth bearing rod are consistent and set in opposite directions. The first bearing rod and the second bearing rod realize power transmission by means of worm and worm gear meshing. The second bearing rod and the third bearing rod realize power transmission through the first transmission rod, that is, the meshing of the bevel gear, changing the transmission direction, and then realizing steering adjustment through gear meshing. In total, the third load-bearing rod and the fourth load-bearing rod realize power transmission through the meshing of worm and worm gear, and the fourth load-bearing rod and the first load-bearing rod realize power transmission through the second transmission rod, that is, the meshing of bevel gears, to change the transmission direction, and then the steering adjustment is realized through the meshing of gears, so that the first load-bearing rod is rotated clockwise (counterclockwise), the second load-bearing rod is rotated counterclockwise (clockwise), the third load-bearing rod is rotated counterclockwise (clockwise), and the fourth load-bearing rod is rotated clockwise (counterclockwise), so that the first lifting assembly and the second lifting assembly can lift the suspension sling synchronously and at the same speed.

[0018] Fifth, a suspension is installed on the lifting trolley to limit the lateral and longitudinal deviation of the suspension spreader. The guide groove is set to guide the guide wheel for linear lifting and lowering motion. The guide wheel is an unpowered wheel and slides in the guide groove during the lifting of the suspension spreader. The L-shaped shaft includes a horizontal rod body and a vertical rod body. The vertical rod body is provided with a tightening shaft along the longitudinal direction. The tightening shaft is rotated by the tightening motor to cause the guide wheel to deflect laterally, moving closer to or away from the guide groove, adjusting the spacing and further improving the guiding accuracy. The horizontal rod body is arranged along the longitudinal direction and connected to the guide wheel bearing, so that the guide wheel can rotate relative to the L-shaped shaft during the lifting and lowering of the suspension spreader.

[0019] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a technical solution of the present invention;

[0021] Figure 2 A schematic structural diagram of four load-bearing rods according to a technical solution of the present invention;

[0022] Figure 3 This is a schematic structural diagram of an L-shaped shaft according to a technical solution of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0024] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0025] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The orientations or positional relationships indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] like Figures 1-2 As shown, the present invention provides a bridge erection machine lifting device, including a lifting trolley 1, the lifting trolley 1 travels on the bridge erection machine beam 3 through four running wheels 2, and further includes:

[0027] A lifting sling 4 is provided above the lifting trolley 1, and comprises four load-bearing rods arranged in a U-shaped pattern, wherein a first pair of load-bearing rods arranged opposite to each other are provided with a first lifting assembly in the transverse direction, and a second pair of load-bearing rods arranged opposite to each other are provided with a pair of second lifting assemblies in the longitudinal direction;

[0028] The top surface of the suspension sling 5 is a suspension surface, and the bottom surface is provided with a hook. The center of the suspension surface is connected to the first lifting component, and the lateral sides of the center of the suspension surface are connected to a pair of second lifting components.

[0029] In the above technical solution, a lifting sling 4 is provided on the lifting trolley 1 for installing the first lifting component and the second lifting component, thereby lifting or lowering the suspension sling 5, thereby achieving uniform force on the suspension sling 5. Each force point lifts the suspension sling 5 at a uniform traction speed, preventing the hook from shaking, thereby improving the safety of the lifting operation.

[0030] The lifting sling 4 is arranged in the space above the lifting trolley 1, and the suspension sling 5 is arranged in the space below the lifting trolley 1 for lifting operations. The four load-bearing rods are symmetrically distributed. The first lifting assembly is jointly arranged at the center of the first pair of load-bearing rods and the center of the suspension surface. The second lifting assembly is jointly arranged on both sides of the center of the second pair of load-bearing rods and the center of the suspension surface, so that the horizontal center line on the suspension surface is provided with three force points. The force point at the center is pulled by a transversely distributed steel wire rope 8, and the two force points on both sides of the center are symmetrically pulled by a longitudinally distributed steel wire rope 8. The first lifting assembly and the second lifting assembly can be implemented by a drum, pulley, sprocket, etc., which are not limited here.

[0031] In another technical solution, the first lifting assembly and the second lifting assembly each include a pair of fixed rollers 6, a lifting roller 7, and a wire rope 8. The roller shafts of the pair of fixed rollers 6 are coaxially fixed to the corresponding load-bearing rods. The roller shaft of the lifting roller 7 is installed on the suspension surface through a bearing seat. The middle part of the wire rope 8 is wound around the lifting roller 7, and the two ends are wound around the pair of fixed rollers 6. The pair of fixed rollers 6 rotate at the same speed and in opposite directions. The first lifting assembly and the second lifting assembly are both wound around the first fixed roller 6, the lifting roller 7, and the second fixed roller 6 in sequence by the wire rope 8. The fixed rollers 6 are each installed on the corresponding load-bearing rod, that is, the fixed rollers 6 are rotated by driving the load-bearing rod to rotate, thereby achieving the same speed and opposite direction rotation of the pair of fixed rollers 6 of the first lifting assembly and the same speed and opposite direction rotation of the pair of fixed rollers 6 of the second lifting assembly.

[0032] In another technical solution, the first pair of load-bearing rods includes a second load-bearing rod 10 and a fourth load-bearing rod 12, each of which is provided with a fixed roller 6; the second pair of load-bearing rods includes a first load-bearing rod 9 and a third load-bearing rod 11, each of which is provided with two fixed rollers 6; the first load-bearing rod 9, the second load-bearing rod 10, the third load-bearing rod 11, and the fourth load-bearing rod 12 have the same rotation speed; the first load-bearing rod 9 and the fourth load-bearing rod 12 have the same direction of rotation; and the second load-bearing rod 10 and the third load-bearing rod 11 have the same direction of rotation. The four load-bearing rods are the first load-bearing rod 9, the second load-bearing rod 10, the third load-bearing rod 11 and the fourth load-bearing rod 12. The first pair of load-bearing rods includes the second load-bearing rod 10 and the fourth load-bearing rod 12, and the second pair of load-bearing rods includes the first load-bearing rod 9 and the third load-bearing rod 11. The four load-bearing rods are driven by a motor to have the same rotation speed, the first load-bearing rod 9 and the fourth load-bearing rod 12 have the same direction of rotation, and the second load-bearing rod 10 and the third load-bearing rod 11 have the same direction of rotation, and the two are different, so that the first lifting assembly and the second lifting assembly lift the suspension sling 5 synchronously and at the same speed.

[0033] In another technical solution, the second pair of load-bearing rods and the first pair of load-bearing rods are arranged at different heights. One end of the rod body of the first load-bearing rod 9 is provided with a worm portion 901 and the other end is provided with a first bevel gear 902. One end of the rod body of the third load-bearing rod 11 is provided with a worm portion 111 and the other end is provided with a first bevel gear 112. One end of the rod body of the second load-bearing rod 10 and the fourth load-bearing rod 12 is provided with a worm gear portion and the other end is provided with a driving gear. One end of the first load-bearing rod 9 is rotated by a drive motor 903.

[0034] The first load-bearing rod 9 and the second load-bearing rod 10 are engaged with each other through the worm gear to realize power transmission, and the second load-bearing rod 10 and the third load-bearing rod 11 realize power transmission through the first transmission rod 13. The first transmission rod 13 is parallel to the second load-bearing rod 10, and the first transmission rod 13 and the second load-bearing rod 10 are set at different heights. The first transmission rod 13 is coaxially provided with a second bevel gear 131 and a driven gear 132. The driving gear of the second load-bearing rod 10 (due to the overlap of the top view, the other end of the second load-bearing rod 10 is located below the first transmission rod 13, not shown in the figure) is engaged with the driven gear 132 of the first transmission rod 13, and the second bevel gear 131 of the first transmission rod 13 is engaged with the first bevel gear 112 of the third load-bearing rod 11 The third load-bearing rod 11 and the fourth load-bearing rod 12 realize power transmission through the meshing of worm and worm gear, and the fourth load-bearing rod 12 and the first load-bearing rod 9 realize power transmission through the second transmission rod 14. The second transmission rod 14 is parallel to the fourth load-bearing rod 12, and the second transmission rod 14 and the fourth load-bearing rod 12 are arranged at different heights. The second transmission rod 14 is coaxially provided with a second bevel gear 141 and a driven gear 142. The driving gear of the fourth load-bearing rod 12 (due to the overlap of the top view, the other end of the fourth load-bearing rod 12 is located below the second transmission rod 14, not shown in the figure) is meshed with the driven gear 142 of the second transmission rod 14, and the second bevel gear 141 of the second transmission rod 14 is meshed with the first bevel gear 902 of the first load-bearing rod 9.

[0035] In the above technical solution, the second pair of bearing rods is set higher than the first pair of bearing rods, so that the four bearing rods can realize power transmission. The shapes, specifications and sizes of the first bearing rod 9 and the third bearing rod 11 are consistent and set in opposite directions. The shapes, specifications and sizes of the second bearing rod 10 and the fourth bearing rod 12 are consistent and set in opposite directions. The first bearing rod 9 and the second bearing rod 10 realize power transmission by means of worm and worm gear meshing. The second bearing rod 10 and the third bearing rod 11 realize power transmission through the first transmission rod 13, that is, the meshing of the bevel gears, change the transmission direction, and then realize it through gear meshing. Steering adjustment, the third load-bearing rod 11 and the fourth load-bearing rod 12 realize power transmission through the meshing of worm and worm gear, and the fourth load-bearing rod 12 and the first load-bearing rod 9 realize power transmission through the second transmission rod 14, that is, the meshing of bevel gears, changing the transmission direction, and then realizing steering adjustment through gear meshing, thereby realizing the first load-bearing rod 9 clockwise (counterclockwise), the second load-bearing rod 10 counterclockwise (clockwise), the third load-bearing rod 11 counterclockwise (clockwise), and the fourth load-bearing rod 12 clockwise (counterclockwise), thereby realizing the first lifting assembly and the second lifting assembly lifting the suspension sling 5 synchronously and at the same speed.

[0036] like Figure 3 As shown, in another technical solution, the lifting trolley 1 is further provided with a pair of suspensions 15, with guide grooves disposed on opposing sides of the pair of suspensions 15. Guide wheels 16 are respectively disposed on the lateral outer sides of the suspension sling 5, and the guide wheels 16 slide in the guide grooves. The suspensions 15 provided on the lifting trolley 1 limit the lateral and longitudinal displacement of the suspension sling 5, and the guide grooves guide the guide wheels 16 in linear lifting motion. The guide wheels 16 are unpowered wheels and slide in the guide grooves during the lifting and lowering of the suspension sling 5.

[0037] In another technical solution, the axle of the guide wheel 16 is an L-shaped shaft 17. The horizontal rod of the L-shaped shaft 17 is arranged in the longitudinal direction. The guide wheel 16 is installed on the horizontal rod of the L-shaped shaft 17 through a bearing. The vertical rod of the L-shaped shaft 17 is provided with a tightening shaft 18 in the longitudinal direction. The tightening shaft 18 rotates under the drive of a tightening motor 19. The L-shaped shaft 17 includes a horizontal rod and a vertical rod. The vertical rod is provided with a tightening shaft 18 in the longitudinal direction. The tightening shaft 18 is rotated by the tightening motor 19 to cause the guide wheel 16 to deflect in the lateral direction, approaching or moving away from the guide groove, adjusting the spacing, and further improving the guiding accuracy. The horizontal rod is arranged in the longitudinal direction and is connected to the bearing of the guide wheel 16, so that the guide wheel 16 can rotate relative to the L-shaped shaft 17 during the lifting and lowering process of the suspension sling 5.

[0038] The number of devices and processing scales described herein are intended to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be readily apparent to those skilled in the art. Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications can be readily implemented by those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A bridge erecting machine lifting device, including a lifting trolley, characterized in that: Also includes: A lifting sling is arranged above the lifting trolley, and the lifting sling comprises four load-bearing rods distributed in a U-shaped pattern, a first pair of load-bearing rods arranged opposite to each other are provided with a first lifting assembly in the transverse direction, and a second pair of load-bearing rods arranged opposite to each other are provided with a pair of second lifting assemblies in the longitudinal direction; The suspension sling has a top surface as a suspension surface and a bottom surface provided with a hook, the center of the suspension surface is connected to the first lifting component, and the lateral sides of the center of the suspension surface are connected to a pair of second lifting components.

2. The bridge erection crane lifting device according to claim 1, characterized in that: The first lifting assembly and the second lifting assembly each include a pair of fixed rollers, a lifting roller, and steel wire ropes. The roller shafts of the pair of fixed rollers are coaxially fixed to corresponding load-bearing rods. The roller shaft of a lifting roller is installed on the suspension surface through a bearing seat. The middle part of the steel wire rope is wound around the lifting roller, and both ends are wound around a pair of fixed rollers. The pair of fixed rollers rotate at the same speed and in opposite directions.

3. The bridge erection crane lifting device according to claim 2, characterized in that: The first pair of load-bearing rods includes the second load-bearing rod and the fourth load-bearing rod, each of which is provided with a fixed roller; the second pair of load-bearing rods includes the first load-bearing rod and the third load-bearing rod, each of which is provided with two fixed rollers; the first load-bearing rod, the second load-bearing rod, the third load-bearing rod and the fourth load-bearing rod have the same rotation speed; the first load-bearing rod and the fourth load-bearing rod have the same direction of rotation; and the second load-bearing rod and the third load-bearing rod have the same direction of rotation.

4. The bridge erection crane lifting device according to claim 3, characterized in that: The second pair of load-bearing rods and the first pair of load-bearing rods are arranged at different heights. The first and third load-bearing rods have a worm portion at one end of their rod bodies and a first bevel gear at the other end. The second and fourth load-bearing rods have a worm gear at one end of their rod bodies and a driving gear at the other end. One end of the first load-bearing rod rotates under the driving motor. The first load-bearing rod and the second load-bearing rod are meshed with a worm and worm gear to achieve power transmission, the second load-bearing rod and the third load-bearing rod are powered by the first transmission rod, the first transmission rod is parallel to the second load-bearing rod, and the first transmission rod and the second load-bearing rod are arranged at different heights, the first transmission rod is coaxially provided with a second bevel gear and a driven gear, the driving gear of the second load-bearing rod is meshed with the driven gear of the first transmission rod, the second bevel gear of the first transmission rod is meshed with the first bevel gear of the third load-bearing rod, the third load-bearing rod and the fourth load-bearing rod are powered by the worm and worm gear meshing, the fourth load-bearing rod and the first load-bearing rod are powered by the second transmission rod, the second transmission rod is parallel to the fourth load-bearing rod, and the second transmission rod and the fourth load-bearing rod are arranged at different heights, the second transmission rod is coaxially provided with a second bevel gear and a driven gear, the driving gear of the fourth load-bearing rod is meshed with the driven gear of the second transmission rod, and the second bevel gear of the second transmission rod is meshed with the first bevel gear of the first load-bearing rod.

5. The bridge erection crane lifting device according to claim 1, characterized in that: The lifting trolley is also provided with a pair of suspensions, and the opposite sides of the pair of suspensions are provided with guide grooves. The two lateral outer sides of the suspension hanger are respectively provided with guide wheels, and the guide wheels are slidably arranged in the guide grooves.

6. The bridge erection crane lifting device according to claim 5, characterized in that: The wheel axle of the guide wheel is an L-shaped shaft, the horizontal rod body of the L-shaped shaft is arranged along the longitudinal direction, the guide wheel is installed on the horizontal rod body of the L-shaped shaft through a bearing, and the vertical rod body of the L-shaped shaft is provided with a tightening shaft along the longitudinal direction, and the tightening shaft rotates under the drive of the tightening motor.

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