CN114104987B

CN114104987B - Portal crane for bridge deck pavement

Info

Publication number: CN114104987B
Application number: CN202210083013.4A
Authority: CN
Inventors: 张朝军; 李海雷; 艾秦琼; 许东奇; 付浩
Original assignee: Henan Traffic Construction Engineering Co ltd; Henan Xiangdong Traffic Construction Engineering Co ltd
Current assignee: Henan Traffic Construction Engineering Co ltd; Henan Xiangdong Traffic Construction Engineering Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-04-22
Anticipated expiration: 2042-01-25
Also published as: CN114104987A

Abstract

The invention relates to a portal crane for bridge deck pavement, which comprises: the supporting component is arranged on a beam of the crane rack in a sliding manner, and a driving component is arranged on the supporting component; two main shafts are rotatably arranged on the supporting component, and one end of each main shaft is connected with a first motor; the device is characterized in that the winding assemblies are arranged on the main shaft, the transmission assembly is arranged between the two winding assemblies, the transmission assembly is arranged on the supporting assembly, the winding assemblies are wound with lifting ropes, the end parts of the lifting ropes are connected with lifting hooks for lifting the bridge deck through the guide structures, when one main shaft is broken, the winding assemblies on the main shaft which is not broken are locked, and the winding assemblies on the main shaft which is broken are locked through the transmission assembly, so that unsafe accidents are avoided, the practicability is high, and the popularization value is high.

Description

Portal crane for bridge deck pavement

Technical Field

The invention relates to the field of hoisting equipment, in particular to a portal crane for paving a bridge deck.

Background

The deck slab, also known as a roadway slab, is a load-bearing structure that directly bears the wheel pressure of the vehicle. It is generally structurally integrally connected to the ribs and diaphragms of the main beam, so that it is capable of transmitting the vehicle load to the main beam, and also of forming part of the main beam cross-section, and ensuring the overall function of the main beam.

When laying the bridge face, need use the hoist to lift by crane it, the mechanism of lifting by crane of traditional hoist, long-time high-frequency lifts by crane it, and motor spindle can appear wearing and tearing, can appear lifting by crane the cracked problem of in-process emergence main shaft, and the main shaft fracture then can lead to the decking to drop to lead to unsafe occurence of failure.

Therefore, it is desirable to provide a gantry crane for bridge deck pavement to solve the above problems.

Disclosure of Invention

The invention provides a portal crane for bridge deck pavement, which can lock a rolling wheel when a main shaft is broken to prevent unsafe accidents from happening, and aims to solve the existing problems.

The portal crane for bridge deck pavement adopts the following technical scheme:

the method comprises the following steps:

the supporting component is arranged on the beam of the crane rack in a sliding manner, and a driving component for driving the supporting component to move along the beam of the crane rack is arranged on the supporting component;

the two main shafts are rotatably arranged on the supporting assembly, the central lines of the two main shafts are superposed and parallel to the beam, and one end of each main shaft is connected with a first motor for driving the main shaft to rotate;

the rolling subassembly sets up on the main shaft, includes: the circular truncated cones penetrate through the main shaft and are connected with the guide rails arranged along the main shaft in a sliding manner, and the large bottom surfaces of the two circular truncated cones are opposite; a plurality of grooves are formed in the main shaft positioned on one side of the small bottom surface of the circular truncated cone, and limit structures are arranged in the grooves; the cover is equipped with the interior ratchet of being connected with supporting component on the main shaft, is provided with the arc of one respectively between interior ratchet and every limit structure, and every two adjacent arcs pass through synchronous connection spare to be connected, and the one end of arc and the inner wall contact of interior ratchet, the inner circle of the other end of arc is provided with elasticity extending structure perpendicularly, and elasticity extending structure includes: the telescopic cylinder is fixed on the inner arc surface of the arc plate, a telescopic rod is sleeved in the telescopic cylinder, a second spring is connected between the end part of the telescopic rod and the telescopic cylinder, one end of the telescopic rod with an elastic telescopic structure, which is far away from the arc plate, penetrates into the corresponding groove and then is contacted with the limiting structure, a guide groove arranged on the arc surface of the round platform is arranged on the end surface of the arc plate, which faces the round platform, in a sliding connection manner, a winding rod is arranged on one end surface of the arc plate, which is far away from the round platform, and a winding drum which is approximately circular is surrounded by a plurality of winding rods;

the lifting rope is wound on the winding drum, and the end part of the lifting rope is connected with a lifting hook after being guided by the guide wheel;

the transmission assemblies are axially and slidably connected onto the supporting assembly along the spindle, one end of each transmission assembly is slidably connected onto one surface, deviating from the inner ratchet, of the circular truncated cone through the center of the circular truncated cone, racks are slidably arranged on the opposite surfaces of the two transmission assemblies, a first gear meshed with the racks is arranged between the two racks, the first gear is connected with the rotating shaft through a one-way bearing, the rotating shaft is connected with the supporting assembly, and one end, deviating from the circular truncated cone, of each rack is connected with the transmission assembly through a reset spring.

Preferably, the output end of the driving assembly is fixedly sleeved with a second gear, and the second gear is meshed with a rack axially arranged on the beam along the main shaft.

Preferably, the support assembly comprises: two relative sliding sets up the supporting seat on the roof beam, sliding connection has the bracing piece on the roof beam between two supporting seats, and has the interval between the tip of bracing piece and the adjacent supporting seat.

Preferably, the first motor is arranged on the supporting seat, one end of the main shaft is rotatably connected with the supporting seat, the other end of the main shaft is rotatably connected with the supporting rod, and the winding assembly is arranged on the main shaft between the supporting rod and the supporting seat.

Preferably, the transmission assembly comprises a transmission rod, the transmission rod is connected to the support rod in a sliding mode along the length direction of the support rod, and one end of the transmission rod is connected to an annular sliding groove formed in the circular truncated cone in a sliding mode; the end part of the transmission rod, which is far away from the circular truncated cone, is provided with a stop block, wherein the rack is connected to the transmission rod in a sliding manner, and the return spring is connected between the stop block and the end part of the rack.

Preferably, the inner ratchet wheel is connected to the end of the support rod, and the tooth surface of the inner teeth on the inner ratchet wheel is an arc surface, and the distance from the arc surface to the center of the inner ratchet wheel gradually decreases along the direction of the arc surface of the single inner teeth.

Preferably, one side of the support seat, which faces the winding assembly, is provided with a second motor, the output end of the second motor is sleeved and fixed with a rotating wheel, one end of the lifting rope is wound on the rotating wheel, and the middle part of the lifting rope is wound on the winding wheel.

Preferably, limit structure includes: the stopper, the stopper sets up in the recess, and the bottom sliding connection of stopper and recess, the slip direction of stopper is perpendicular with elastic expansion structure's flexible direction, be provided with the third spring between one side of stopper and the recess inner wall, first spacing groove has been seted up to one side that the stopper deviates from the third spring, first spacing inslot interpolation is equipped with the limiting plate of top at elastic expansion structure tip, the limiting plate deviates from the one end of first spacing groove and the lateral wall sliding connection of recess, the slip direction of limiting plate is parallel with elastic expansion structure's flexible direction, and be connected with the fourth spring between the interior bottom surface of limiting plate and recess.

Preferably, the telescopic link deviates from the limiting plate contact on the one end and the stopper of telescopic cylinder.

Preferably, synchronous connection spare includes first slider, and first slider is connected on the arc along the pitch arc direction sliding connection of arc inner wall, is connected with first spring between first slider and the arc that is close to elasticity extending structure one end, and first slider is articulated with the extrados of another arc.

The invention has the beneficial effects that: the invention provides a portal crane for laying bridge deck, which drives two corresponding main shafts to rotate through two first motors, the main shafts drive rolling components on the main shafts to rotate, when one main shaft is broken, the stress of the other main shaft is increased, a plurality of winding rods of the rolling components on the main shafts are drawn close to the center, so that a formed rolling wheel is reduced, an arc plate is driven to rotate around the hinged position of a first sliding block, the other end of the arc plate is meshed with inner teeth on an inner ratchet wheel to form a limit position, the rolling components are ensured not to rotate any more, meanwhile, a round platform on the broken main shaft is driven to move through a transmission component, the round platform drives the hinging balls of the rolling components to move along a guide groove, the hinging balls move in a direction deviating from the center, and then the winding rods on the arc plate move in a direction far away from the center, so that the arc plate is pressed against the inner teeth on the inner ratchet wheel, form the block state, make the rolling component not rotating, the bridge plate that has prevented to lift by crane drops, unsafe occurence of failure has been avoided, secondly, because the winding wheel can reduce when hoisting heavier object, the winding wheel reduces, the moment of torsion increase, the torsion that first motor provided when reinforcing object lifts by crane, furthermore, when one of them main shaft fracture, the main shaft that does not fracture can bear the weight of hoisting the object completely, the winding wheel can receive great pressure and then shrink, make cracked epaxial winding wheel of main shaft open through transmission assembly, thereby prop the lifting rope of winding above that, increase the length that the lifting rope twined on the equalizer simultaneously, and the contact area is improved, thereby increase frictional force, prevent skidding, therefore, the clothes hanger is strong in practicability, and is worth promoting.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the general structure of an embodiment of a gantry crane for bridge deck pavement according to the present invention;

FIG. 2 is a schematic view of another configuration of the gantry of FIG. 1;

FIG. 3 is a partial cross-sectional view of the support assembly of FIG. 2;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a state diagram A of the takeup assembly of FIG. 2;

FIG. 6 is a state diagram B of the takeup assembly of FIG. 2;

FIG. 7 is a cross-sectional view of the takeup assembly of FIG. 4;

FIG. 8 is an enlarged view at C of FIG. 7;

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 10 is an assembly view of the takeup assembly, the transmission assembly and the spindle of FIG. 2;

FIG. 11 is a schematic view of the winding rod, arc plate and hinge ball of the winding assembly of FIG. 10;

FIG. 12 is a schematic view of the spindle of FIG. 10;

FIG. 13 is an assembly view of the drive assembly and the rotary table of FIG. 10;

FIG. 14 is a cross-sectional view of the spindle, the circular table, and the take-up assembly of FIG. 2;

fig. 15 is a cross-sectional view of the spindle of fig. 2.

In the figure: 1. a gantry frame; 2. a mobile device; 3. a supporting seat; 31. a first motor; 32. a drive assembly; 33. a second motor; 4. a support bar; 5. a first gear; 6. an arc-shaped plate; 61. a winding rod; 62. an arc-shaped slot; 63. hinging the ball; 64. a telescopic cylinder; 7. a main shaft; 71. a groove; 8. an inner ratchet wheel; 81. a round bar; 9. a circular truncated cone; 10. a transmission rod; 11. a lifting rope; 12. a telescopic rod; 13. a first spring; 14. a second spring; 15. a third spring; 16. a limiting block; 17. a limiting plate; 18. a first slider; 19. a second slider; 20. a fourth spring; 21. a rack; 22. a return spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An embodiment of a gantry crane for bridge deck pavement according to the present invention, as shown in fig. 1, includes: support assembly slidably arranged on a beam of a gantry 1, wherein the gantry 1 is a gantry 1 with a moving device 2, in particular the support assembly comprises: the crane comprises two supporting seats 3 which are arranged on a beam in a relative sliding mode, a supporting rod 4 is connected to the beam between the two supporting seats 3 in a sliding mode, and a distance is reserved between the end portion of each supporting seat 4 and the adjacent supporting seat 3, wherein a driving assembly 32 for driving the supporting seats 3 to move along the beam of the crane frame 1 is arranged on each supporting seat 3 of each supporting assembly, specifically, a second gear is fixedly sleeved at the output end of each driving assembly 32 and meshed with a rack on the beam, as shown in fig. 3, a main shaft 7 is rotatably connected between each supporting seat 3 and each supporting rod 4, the central lines of the two main shafts 7 are overlapped and parallel to the beam, and one end of each main shaft 7 is connected with a first motor 31 for driving the main shafts to rotate; a winding assembly is arranged on the spindle 7, and specifically, as shown in fig. 10, the winding assembly includes: the circular truncated cones 9 are arranged on the spindle 7 in a penetrating mode and are in sliding connection with guide rails arranged in the length direction of the spindle 7, and the large bottom surfaces of the two circular truncated cones 9 are opposite; as shown in fig. 12, a plurality of grooves 71 are formed on the main shaft 7 on one side of the small bottom surface of the circular truncated cone 9, a limiting structure is arranged in each groove 71, an inner ratchet 8 fixedly connected with the support assembly is sleeved on the main shaft 7, as shown in fig. 5, a round rod 81 fixedly connected with the support assembly is arranged on the inner ratchet 8, as shown in fig. 7 and 8, an arc-shaped plate 6 is respectively arranged between the inner ratchet 8 and each limiting structure, every two adjacent arc-shaped plates 6 are connected through a synchronous connecting piece, one end of each arc-shaped plate 6 is contacted with the inner wall of the inner ratchet 8, an inner ring at the other end of each arc-shaped plate 6 is vertically provided with an elastic telescopic structure, one end of each elastic telescopic structure, which deviates from the arc-shaped plates 6, is penetrated into the corresponding groove 71 and then contacted with the limiting structure, specifically, as shown in fig. 7 and 8, a movable groove for sliding the end of each elastic telescopic structure around the main shaft 7 is formed at the notch of each groove 71, and the end surface of the arc-shaped plate 6 facing the circular truncated cone 9 is provided with a guide slot which is slidably connected with the arc surface of the circular truncated cone 9, specifically, as shown in fig. 1 and 11, the end surface of the arc-shaped plate 6 is provided with a hinged ball 63, the hinged ball 63 is hinged with a second slide block 19, the second slide block 19 is slidably connected in the guide slot, the guide slot is arranged along the arc surface of the circular truncated cone 9, one end surface of the arc-shaped plate 6 departing from the circular truncated cone 9 is provided with a winding rod 61, the winding rods 61 surround an approximately circular winding drum, a lifting rope 11 is wound on the winding drum, and the end part of the lifting rope 11 is connected with a lifting hook after being guided by the guide wheel; as shown in fig. 3, a transmission assembly is connected to the support assembly in a sliding manner along the axial direction of the main shaft 7, as shown in fig. 10, one end of the transmission assembly is connected to one surface of the circular truncated cone 9, which is far away from the inner ratchet 8, in a sliding manner along the center of the circular truncated cone 9, as shown in fig. 3, a rack 21 is arranged on one surface of the two transmission assemblies, which is opposite to the surface, in a sliding manner, a first gear 5 which is meshed with the rack 21 is arranged between the two racks 21, the first gear 5 is connected with a rotating shaft through a one-way bearing, specifically, the rotating shaft is connected with the support rod 4 of the support assembly, one end of the rack 21, which is far away from the circular truncated cone 9, is connected with the transmission assembly through a return spring 22, specifically, one end of the rack 21, which is far away from the circular truncated cone 9, is connected with the transmission rod 10 of the transmission assembly through the return spring 22, when one of the main shaft 7 is broken, the winding rod 61 of the winding assembly on the unbroken main shaft 7 is forced to move to the center, so that the other end of the arc-shaped plate 6 is meshed with the inner ratchet 8, make this rolling subassembly lock die not rotating, make cracked main epaxial 7 of main shaft's arc 6 actions through drive assembly simultaneously for the tip card of arc 6 is on the internal tooth of interior ratchet 8, and the internal tooth meshing, thereby the rolling subassembly on the cracked main shaft 7 of locking, lifting rope 11 on the rolling subassembly has been prevented by the decking and has been pulled downwards, thereby prevents that the decking from dropping, prevents unsafe occurence of failure.

Specifically, the first motor 31 is disposed on the supporting seat 3, one end of the main shaft 7 is rotatably connected to the supporting seat 3, the other end of the main shaft 7 is rotatably connected to the supporting rod 4, and the winding assembly is disposed on the main shaft 7 between the supporting rod 4 and the supporting seat 3.

Specifically, as shown in fig. 3 and 10, the transmission assembly includes a transmission rod 10, the transmission rod 10 is slidably connected to the support rod 4 along the length direction of the support rod 4, and as shown in fig. 13, one end of the transmission rod 10 is slidably connected to an annular sliding groove formed in the circular truncated cone 9; as shown in fig. 3, the end of the transmission rod 10 facing away from the circular table 9 is provided with a stop, wherein the rack 21 is slidably connected to the transmission rod 10, and the return spring 22 is connected between the stop and the end of the rack 21.

Specifically, the inner ratchet 8 is connected to the end of the support rod 4, as shown in fig. 5, 6 and 7, and the tooth surface of the inner teeth on the inner ratchet 8 is an arc surface, and the distance from the arc surface to the center of the inner ratchet 8 gradually decreases along the direction of the arc surface of a single inner tooth.

Specifically, in order to tighten the lifting rope 11, as shown in fig. 2, 4 and 9, a second motor 33 is disposed on one side of the support base 3 facing the winding assembly, a rotating wheel is fixed to an output end of the second motor 33 in a sleeved manner, one end of the lifting rope 11 is wound on the rotating wheel, and a middle portion of the lifting rope 11 is wound on the winding wheel.

Specifically, as shown in fig. 8, the limiting structure includes: stopper 16, stopper 16 sets up in recess 71, and stopper 16 and recess 71's bottom sliding connection, stopper 16's slip direction is perpendicular with elastic telescopic structure's flexible direction, be provided with third spring 15 between stopper 16's one side and the recess 71 inner wall, stopper 16 has seted up first spacing groove in the one side that deviates from third spring 15, first spacing inslot interpolation is equipped with the limiting plate 17 of top at elastic telescopic structure's telescopic link 12, limiting plate 17 deviates from the one end in first spacing groove and recess 71's lateral wall sliding connection, limiting plate 17's slip direction is parallel with elastic telescopic structure's flexible direction, and be connected with fourth spring 20 between limiting plate 17 and the interior bottom surface of recess 71, wherein, according to fig. 8 and fig. 15, man-hour, earlier set up a plurality of activity grooves in main shaft 7's circumference, then set up recess 71 at activity groove bottom, stopper 16 deviates from the activity groove lateral wall of one side of third spring and sets up the spacing second with stopper 16 complex spacing A groove.

Specifically, one end of the telescopic rod 12, which is far away from the telescopic cylinder 64, is in contact with the limiting plate 17 on the limiting block 16.

Specifically, as shown in fig. 7 and 11, the synchronous connecting member includes a first slider 18, the first slider 18 is slidably connected in an arc-shaped groove 62 formed in an inner ring of the arc-shaped plate 6 along an arc direction of an inner wall of the arc-shaped plate 6, a first spring 13 is connected between the first slider 18 and the arc-shaped plate 6 close to one end of the elastic telescopic structure, and the first slider 18 is hinged to an outer arc surface of another arc-shaped plate 6.

Specific working principle

During the use, at first will need the bridge plate both ends of lifting by crane the hook, then start first motor 31 and drive main shaft 7 and rotate to drive the reel that a plurality of winding poles 61 formed and rotate, make lifting rope 11 upwards rolling, and then drive the bridge plate and lift by crane.

When the bridge plate is too heavy, in the process, the reel formed by the plurality of winding rods 61 is acted by the force of the lifting rope 11, as shown in fig. 5 to 6, the diameter of the reel formed by the plurality of winding rods 61 is reduced by the force of the winding rods 61, and at this time, the elastic telescopic structure composed of the telescopic cylinder 64, the telescopic rod 12 and the second spring 14 slides around the movable groove on the main shaft 7, that is, as shown in fig. 8, the telescopic rod 12 is displaced leftwards when the reel is reduced in the initial state, and further the telescopic rod 12 pushes the limit block 16 to move leftwards in the movable groove of the notch of the groove 71, as shown in fig. 8, the telescopic rod 12 of the elastic telescopic structure slides anticlockwise along the movable groove of the notch of the groove 71 along the main shaft 7, specifically, and simultaneously, the arc-shaped plate 6 slides along the tooth surface of the inner ratchet 8, and as the distance from the arc-shaped surface of the tooth surface of the inner ratchet 8 to the center gradually decreases, the hinge ball 63 on the arc-shaped plate 6 also approaches to the center, and at the same time, the limit plate 17 continuously slides out from the first limit groove on the limit block 16 until the limit block 16 moves to the inner wall of the groove 71 in the groove 71, and when the limit block 16 cannot move, that is, reaches a critical point, at this time, the limit plate 17 is not limited by the first limit groove of the limit block 16, at this time, the telescopic rod 12 can push the limit plate 17 to slide towards the inner bottom surface of the groove 71, so that the fourth spring 20 is compressed, at this time, the rolling wheel rapidly contracts to reach the state shown in fig. 6, and at the same time, because the first slider 18 is hinged with the outer arc surface of the adjacent arc-shaped plate 6, when the telescopic rod 12 moves towards the inside of the groove 71, at this time, the hinged point of the first slider 18 and the arc-shaped plate 6 is equivalent to a fulcrum of a lever, therefore, one end of the arc-shaped plate 6 departing from the elastic telescopic structure approaches to the inner teeth on the inner ratchet 8 inner ring to form a meshing relationship, and the arc-shaped plate 6 and the inner ratchet wheel 8 are locked, so that the object can not be lifted.

In normal work, when one of them main shaft 7 fracture, as shown in fig. 2, right-hand member main shaft 7 breaks suddenly, the reel that a plurality of winding rods 61 on right side formed can rotate clockwise freely this moment, the weight of whole bridge board is born by the reel of left rolling subassembly, 11 atresss of lifting rope of winding on a plurality of winding rods 61 of left end increase promptly, thereby make the reel contract fast, second pressure spring 14 is compressed, every winding rod 61 atress when the reel makes telescopic link 12 of elastic expansion structure slide around the movable slot of main shaft 7 upper groove 71 notch, thereby promote stopper 16 and remove in the movable slot of groove 71 notch, until stopper 16 can not remove, at this moment stopper 17 slides out just from the first spacing groove on stopper 16, elastic expansion structure promotes stopper 17 and removes to the bottom surface in groove 71, simultaneously the one end of arc 6 that deviates from elastic expansion structure can be close to thereby the top forms to nibble on the internal tooth and nibbles on internal tooth of inside ratchet 8 inner circle In the process that the limiting plate 17 moves towards the inner bottom surface of the groove 71, as shown in fig. 10, the second slider 19 connected to the hinge ball 63 of the arc-shaped plate 6 moves along the guide groove, as shown in fig. 3, and then drives the round table 9 on the unbroken main shaft 7 to move upwards, the round table 9 drives the transmission rod 10 to move upwards, the rack 21 on the transmission rod 10 moves through the gear 5 to drive the other rack 21 to move downwards, the other rack 21 moves downwards to make the round table 9 on the broken main shaft 7 move downwards, at this time, the round table 9 moves downwards to drive the second slider 19 on the hinge ball 63 to move along the guide groove, in the process, as the main shaft breaks, the elastic telescopic structure on the arc-shaped plate 6 is firstly reset to the right side of the movable groove of the notch of the groove 71, as shown in fig. 8, when the transmission rod 10 drives the round table 9 on the broken main shaft 7 to move downwards, elastic telescopic structure on the arc 6 just can have right to left removal along recess 71, and simultaneously, arc 6 drives the reel that a plurality of winding poles 61 formed and enlarges, arc 6 card that sets up hinge ball 63 is on the internal tooth of interior ratchet 8, the reel is when clockwise turning, arc 6 card is on the internal tooth of interior ratchet 8 and can't rotate, the reel of the cracked rolling subassembly of main shaft 7 this moment begins the atress to reduce because the unable rotation of effect of lifting rope 11 begins, elastic telescopic structure promotes stopper 16 and removes promptly, make limiting plate 17 to recess 71 bottom surface removal, the reel that at this moment a plurality of winding poles 61 formed reduces, the reel can't rotate, the reel can lock, lifting rope 11 on the rolling subassembly that makes the main shaft fracture one side no longer releases downwards, thereby prevented the bridge board and dropped, avoid unsafe occurence of failure.

In summary, in the portal crane for laying bridge deck provided by the embodiment of the invention, two corresponding main shafts are driven to rotate by two first motors, the main shafts drive the winding assemblies thereon to rotate, when one of the main shafts is broken, the stress of the other main shaft is increased, and the plurality of winding rods of the winding assembly on the main shaft are drawn close to the center to reduce the formed winding wheel, so as to drive the arc plate to rotate around the hinged position of the first slider, so that the other end of the arc plate is meshed with the internal teeth on the internal ratchet wheel to form a limit, thereby ensuring that the winding assembly does not rotate any more, meanwhile, the round platform on the broken main shaft is driven by the transmission assembly to move, so that the round platform drives the hinge balls of the winding assembly to move along the guide grooves, the plurality of hinge balls move in the direction away from the center, and further the plurality of winding rods on the arc plate move in the direction away from the center first, make the arc top on the internal tooth of internal ratchet, form the block state, make the rolling component not rotate, the bridge plate that has prevented to lift by crane drops, unsafe occurence of failure has been avoided, secondly, because the rolling wheel can reduce when hoisting heavier object, the rolling wheel reduces, the moment of torsion increase, the torsion that first motor provided when reinforcing object hoisted, furthermore, when one of them main shaft fracture, unbroken main shaft can bear the weight of hoisting the object completely, the rolling wheel can receive great pressure and then shrink, make cracked epaxial rolling wheel of main shaft open through drive assembly, thereby prop the lifting rope of winding above that, increase the length of lifting rope winding on the uniform wheel simultaneously, and the contact area is improved, thereby increase frictional force, prevent to skid, therefore, the clothes hanger is strong in practicability, and is worth promoting.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a bridge face is laid and is used gantry crane which characterized in that includes:

the rolling subassembly sets up on the main shaft, includes: the circular truncated cones penetrate through the main shaft and are connected with the guide rails arranged along the main shaft in a sliding manner, and the large bottom surfaces of the two circular truncated cones are opposite; a plurality of grooves are formed in the main shaft on one side of the small bottom surface of the circular truncated cone, and limit structures are arranged in the grooves; the cover is equipped with the interior ratchet of being connected with supporting component on the main shaft, is provided with the arc of one respectively between interior ratchet and every limit structure, and every two adjacent arcs pass through synchronous connection spare to be connected, and the one end of arc and the inner wall contact of interior ratchet, the inner circle of the other end of arc is provided with elasticity extending structure perpendicularly, and elasticity extending structure includes: the telescopic cylinder is fixed on the inner arc surface of the arc plate, a telescopic rod is sleeved in the telescopic cylinder, a second spring is connected between the end part of the telescopic rod and the telescopic cylinder, one end of the telescopic rod with an elastic telescopic structure, which is far away from the arc plate, penetrates into the corresponding groove and then is contacted with the limiting structure, a guide groove arranged on the arc surface of the round platform is arranged on the end surface of the arc plate, which faces the round platform, in a sliding connection manner, a winding rod is arranged on one end surface of the arc plate, which is far away from the round platform, and a winding drum which is approximately circular is surrounded by a plurality of winding rods;

drive assembly, along main shaft axial sliding connection on support assembly, its one end is connected in the round platform with round platform center slidable in the round platform deviates from the one side of interior ratchet, and slide in the relative one side of two drive assemblies and be provided with the rack, be provided with the first gear with rack toothing between two racks, first gear passes through one-way bearing and pivot connection, pivot and support assembly connect, reset spring is passed through to the one end that the rack deviates from the round platform and is connected with drive assembly, drive assembly's output suit is fixed with the second gear, the second gear with along the rack toothing of main shaft axial setting on the roof beam, support assembly includes: the transmission assembly comprises a transmission rod, the transmission rod is connected onto the supporting rod in a sliding mode along the length direction of the supporting rod, and one end of the transmission rod is connected into an annular sliding groove formed in the circular truncated cone in a sliding mode; the tip that the transfer line deviates from the round platform is provided with the dog, and wherein, rack sliding connection is on the transfer line, and reset spring connects between the tip of dog and rack, limit structure includes: the limiting block is arranged in the groove and is connected with the bottom of the groove in a sliding manner, the sliding direction of the limiting block is perpendicular to the telescopic direction of the elastic telescopic structure, a third spring is arranged between one side of the limiting block and the inner wall of the groove, a first limiting groove is formed in one side of the limiting block, which is far away from the third spring, a limiting plate which is propped against the end part of the elastic telescopic structure is inserted in the first limiting groove, one end of the limiting plate, which is far away from the first limiting groove, is connected with the side wall of the groove in a sliding manner, the sliding direction of the limiting plate is parallel to the telescopic direction of the elastic telescopic structure, a fourth spring is connected between the limiting plate and the inner bottom surface of the groove, the synchronous connecting piece comprises a first sliding block, the first sliding block is connected to the arc-shaped plate in a sliding manner along the arc-shaped direction of the inner wall of the arc-shaped plate, and a first spring is connected between the first sliding block and the arc-shaped plate near one end of the elastic telescopic structure, and the first sliding block is hinged with the outer cambered surface of the other arc-shaped plate.

2. The gantry crane according to claim 1, wherein the first motor is disposed on the support base, one end of the main shaft is rotatably connected to the support base, the other end of the main shaft is rotatably connected to the support rod, and the winding assembly is disposed on the main shaft between the support rod and the support base.

3. The gantry crane for bridge slab laying according to claim 1, wherein the inner ratchet is connected to the end of the support rod, and the tooth surface of the inner teeth of the inner ratchet is an arc surface, and the distance from the arc surface to the center of the inner ratchet is gradually reduced along the direction of the arc surface of the single inner tooth.

4. The gantry crane for bridge slab laying according to claim 1, wherein a second motor is installed on one side of the supporting base facing the winding assembly, a rotating wheel is fixed on an output end of the second motor in a sleeved manner, one end of the lifting rope is wound on the rotating wheel, and a middle portion of the lifting rope is wound on the winding wheel.

5. The gantry crane for bridge slab pavement according to claim 1, wherein one end of the telescopic rod away from the telescopic cylinder contacts with the limiting plate on the limiting block.