CN113371605A

CN113371605A - Novel bridge crane

Info

Publication number: CN113371605A
Application number: CN202110781169.5A
Authority: CN
Inventors: 刘永生; 宛经纬
Original assignee: Guangdong Baitong Civil Air Defense Engineering Protection Equipment Co ltd
Current assignee: Guangdong Baitong Civil Air Defense Engineering Protection Equipment Co ltd
Priority date: 2021-07-10
Filing date: 2021-07-10
Publication date: 2021-09-10

Abstract

The utility model belongs to the technical field of the hoisting equipment technique and specifically relates to a novel bridge crane is related to, including two crane span structures that set firmly in the workshop both sides respectively, two respectively movably set up the mobile device on two crane span structures, connect crossbeam between two mobile device and movably set up the hoisting device on the crossbeam, still include two respectively movably set up the walking dolly on two crane span structures, connect the link between two walking dollies, movably set up slider and gag lever post on the link, gag lever post one end is articulated mutually with the slider, the other end is articulated mutually with hoisting device's hoist and mount end, be equipped with a stop gear between slider and the hoisting device, stop gear is used for limiting the relative movement between crossbeam and the link when the mobile device operation and removes the restriction when the hoisting device operation. This application can reduce rocking of material to reduce the material and rock the threat to controlling the workman and produce.

Description

Novel bridge crane

Technical Field

The application relates to the technical field of hoisting equipment, in particular to a novel bridge crane.

Background

In the process of manufacturing the civil air defense door, because the civil air defense door/civil air defense door component has large weight, a production workshop of the civil air defense door is usually provided with hoisting equipment for hoisting and transporting the civil air defense door/civil air defense door component.

The bridge crane is hoisting equipment for hoisting materials above workshops, warehouses and stockyards by cross frames, can fully utilize the space in a hoisting environment to hoist and transport the materials, and has the advantage of being free from being blocked by ground equipment. Therefore, the bridge crane is widely applied to production workshops of the civil air defense door for hoisting and transporting the civil air defense door/civil air defense door component.

The existing bridge crane usually comprises two bridge frames, two moving devices, a beam and a hoisting device, wherein the two bridge frames are fixedly arranged on two sides of a workshop respectively, the two moving devices are movably arranged on the two bridge frames respectively, the beam is fixedly connected between the two moving devices, the hoisting device is usually a winch, and the hoisting device is movably arranged on the beam and is used for hoisting materials. When the hoisting device is used for hoisting and transporting, the hoisting end of the hoisting device is used for hoisting materials, and then the moving device is controlled to drive the cross beam to move so as to transport the materials hoisted by the hoisting device to the specified position.

However, in the hoisting and transporting process, when the moving device is started/stopped, the material is prone to generate large shaking due to the fact that the speed of the moving device is changed too fast, and the large shaking of the material is prone to causing certain threats to the safety of operation workers; therefore, further improvement can be made.

Disclosure of Invention

In order to reduce the threat that the material rocked and produced the control workman, this application provides a novel bridge crane.

The above object of the present application is achieved by the following technical solutions:

the utility model provides a novel bridge crane, includes that two set firmly respectively in the crane span structure of workshop both sides, two respectively movably set up the mobile device on two crane span structures, connect crossbeam between two mobile device and movably set up the hoisting apparatus on the crossbeam, still include two respectively movably set up the walking dolly on two crane span structures, connect link between two walking dollies, movably set up slider and gag lever post on the link, gag lever post one end is articulated mutually with the slider, and the other end is articulated mutually with hoisting apparatus's hoist and mount end, be equipped with a stop gear between slider and the hoisting apparatus, stop gear is used for when the mobile device operation limiting beam and link between relative movement just remove the restriction when hoisting apparatus operation.

Through adopting above-mentioned technical scheme, move at the mobile device to the in-process of locating with the material transportation that hoisting apparatus hoisted to the assigned position, stop gear makes the interval of link and crossbeam keep invariable through the relative movement between restriction crossbeam and the link, thereby makes the link form the support limiting displacement to hoisting apparatus's hoist and mount end through the gag lever post, reduces rocking of material, thereby reduces the threat that the material rocked and produced the control workman.

Optionally, stop gear includes connecting rod and spacing subassembly, connecting rod one end and slider fixed connection, the other end slides and wears to locate in the preset slide opening of hoisting apparatus, just connecting rod one side sets firmly the rack that extends along its length direction, rotationally be equipped with the gear with rack looks meshing in the hoisting apparatus, spacing subassembly sets up in the hoisting apparatus, spacing subassembly is used for restricting the gear rotation when the mobile device moves and removes the restriction when the hoisting apparatus moves.

Through adopting above-mentioned technical scheme, move at the mobile device, in order to make the crossbeam drive hoisting apparatus and remove to hoist and mount station/in order to transport the in-process of assigned position department with the material that hoisting apparatus hoisted, spacing subassembly passes through the restriction gear and rotates, in order to restrict the slip of connecting rod and rack in the slide opening, and then the relative movement between restriction crossbeam and the link, make the interval of crossbeam and link keep invariable, make the link form the support limiting displacement to hoisting apparatus's hoist and mount end through the gag lever post, reduce rocking of material, thereby reduce the threat that the material rocked and produced controlling the workman.

Optionally, spacing subassembly includes band pulley, belt and the first driving piece with the same pivot of gear sharing, predetermined fixed block fixed connection in belt one end and the hoisting apparatus, the other end is around locating the band pulley periphery, first driving piece sets firmly in the hoisting apparatus, first driving piece is used for taut belt when the mobile device moves and loosens the belt when the hoisting apparatus moves.

By adopting the technical scheme, in the process that the moving device operates to enable the cross beam to drive the hoisting device to move to the hoisting station/to transport the material hoisted by the hoisting device to the specified position, the first driving piece operates to tension the belt, so that the friction force between the belt and the belt wheel is increased, and the rotation of the belt wheel, the rotating shaft and the gear is limited by the friction force, so that the sliding of the connecting rod and the rack in the sliding hole is limited, the relative movement between the cross beam and the connecting frame is further limited, and the distance between the cross beam and the connecting frame is kept constant; the lifting device runs to hoist the material, the first driving piece runs to loosen the belt, so that the friction force between the belt and the belt wheel is eliminated, the belt wheel, the rotating shaft and the gear can normally rotate, the connecting rod and the rack can normally slide in the sliding hole, namely, the limitation of relative movement between the cross beam and the connecting frame is removed, the hoisting end of the lifting device can push the connecting frame to freely slide along the length direction of the bridge through the limiting rod, and the process of hoisting the material is completed.

Optionally, still include two buffer sets that set up respectively on two crane cradles, every buffer all includes the mount pad, buffer block and the buffer spring that set firmly on the crane cradle, the buffer block slides to inlay and locates in the mount pad towards the predetermined spout of mobile device one side, the buffer spring both ends are connected with spout tank bottom and buffer block respectively.

Through adopting above-mentioned technical scheme, move at the mobile device, in order to transport the in-process of assigned position department with the material that hoisting apparatus hoisted, under stop gear and gag lever post's combined action, can reduce rocking of material, make mobile device's transport speed can improve, and when mobile device removed to the crane span structure end, mobile device and buffer block looks butt compress buffer spring, thereby utilize buffer spring's elasticity to carry out the speed reduction fast to mobile device, it takes place to reduce the condition that mobile device and mount pad collided each other, novel bridge crane's security improves.

Optionally, a plurality of clamping grooves arranged along the length direction of the buffer block are formed in one side of the buffer block, a clamping component matched with any one clamping groove in a clamping mode is arranged in the mounting seat, and a second driving piece used for driving the clamping component to withdraw from the clamping groove is fixedly arranged in the mounting seat.

Through adopting above-mentioned technical scheme, when mobile device and buffer block looks butt and compress buffer spring, the last corresponding draw-in groove looks joint of joint subassembly and buffer block for the buffer block can't rebound under reset spring's elastic force effect, thereby makes buffer spring gather certain elasticity.

Optionally, the clamping assembly comprises a shifting lever, a return spring and a clamping block, the middle of the shifting lever is hinged to a preset hinging block in the mounting seat, the clamping block is fixedly arranged at one end of the shifting lever, and the return spring is connected between the shifting lever and the hinging block and used for driving the shifting lever to rotate so that the clamping block penetrates through a preset avoiding hole in the wall of the sliding groove and is clamped with the corresponding clamping groove.

By adopting the technical scheme, when the mobile device is abutted against the buffer block and compresses the buffer spring, the fixture block passes through the preset avoidance hole in the chute wall of the chute and is clamped with the corresponding fixture groove on the buffer block under the combined action of the reset spring and the deflector rod, so that the buffer block cannot rebound under the elastic action of the reset spring, and the buffer spring accumulates certain elastic force; after the hoisting device finishes unloading the materials, the lifting rod is pushed to rotate through the second driving piece, so that the clamping block is withdrawn from the clamping groove, the buffer block pushes the mobile device under the elastic action of the buffer spring, the load is reduced when the mobile device is started, and the driving piece in the mobile device is protected to a certain extent.

Optionally, the buffer springs are provided in plurality, and the plurality of buffer springs are uniformly distributed along the center of the sliding chute.

Through adopting above-mentioned technical scheme, buffer spring sets to a plurality ofly, can prevent to lead to the structure to become invalid because single buffer spring damages.

Optionally, a plurality of balancing weights are detachably mounted on the connecting frame.

Through adopting above-mentioned technical scheme, a plurality of balancing weights pile up each other on the link, can improve the whole weight of link and walking dolly to improve the overall stability of link and walking dolly.

In summary, the present application includes at least one of the following beneficial technical effects:

in the process that the moving device operates to transport the materials hoisted by the hoisting device to the designated position, the limiting mechanism enables the distance between the connecting frame and the cross beam to be kept constant by limiting the relative movement between the cross beam and the connecting frame, so that the connecting frame can support and limit the hoisting end of the hoisting device through the limiting rod, the shaking of the materials is reduced, and the threat of the shaking of the materials to the operation workers is reduced;

when the moving device operates to transport materials hoisted by the hoisting device to an appointed position, the swinging of the materials can be reduced under the combined action of the limiting mechanism and the limiting rod, so that the transport speed of the moving device is improved, and when the moving device moves to the tail end of the bridge frame, the moving device is abutted to the buffer block and compresses the buffer spring, so that the elastic force of the buffer spring is utilized to quickly decelerate the moving device, the occurrence of the collision condition between the moving device and the mounting seat is reduced, and the safety of the novel bridge crane is improved;

when the mobile device is abutted against the buffer block and compresses the buffer spring, the fixture block passes through a preset avoidance hole on the chute wall and is clamped with the corresponding fixture groove on the buffer block under the combined action of the reset spring and the deflector rod, so that the buffer block cannot rebound under the elastic action of the reset spring, and the buffer spring accumulates certain elastic force; after the hoisting device finishes unloading the materials, the lifting rod is pushed to rotate through the second driving piece, so that the clamping block is withdrawn from the clamping groove, the buffer block pushes the mobile device under the elastic action of the buffer spring, the load is reduced when the mobile device is started, and the driving piece in the mobile device is protected to a certain extent.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is an enlarged view of a in fig. 1.

Fig. 3 is an enlarged view of B in fig. 1.

Description of reference numerals: 1. a walking trolley; 2. a connecting frame; 3. a slider; 4. a limiting rod; 5. a limiting mechanism; 51. a connecting rod; 52. a limiting component; 521. a pulley; 522. a belt; 523. a first driving member; 524. a fixed block; 53. a slide hole; 54. a rack; 55. a gear; 6. a buffer device; 61. a mounting seat; 62. a buffer block; 63. a buffer spring; 64. a chute; 65. a card slot; 66. a clamping assembly; 661. a deflector rod; 662. a return spring; 663. a clamping block; 664. a hinged block; 665. avoiding holes; 67. a second driving member; 7. a balancing weight; 100. a bridge frame; 200. a mobile device; 300. a cross beam; 400. provided is a hoisting device.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a novel bridge crane.

Referring to fig. 1, the novel bridge crane includes two bridges 100, two moving devices 200, a beam 300, and a hoisting device 400, wherein the two bridges 100 are respectively fixed on two sides of a workshop and are arranged in parallel at intervals; the two moving devices 200 are respectively movably arranged on the two bridges 100, so that the two moving devices 200 can move along the length direction of the bridges 100; the cross beam 300 is fixedly connected between the two moving devices 200 and is arranged perpendicular to the bridge 100, so that the cross beam 300 can move along the length direction of the bridge 100 under the driving of the two moving devices 200; the hoisting device 400 is movably disposed on the beam 300, so that the hoisting device 400 can move along the length direction of the beam 300, that is, the hoisting device 400 can move along the length direction perpendicular to the bridge 100, wherein the hoisting device 400 in this embodiment is a winch, and for convenience of understanding, the hoisting end of the hoisting device 400 in this embodiment is defined as a hook to which the movable end of a steel wire rope of the winch is connected. During hoisting and transportation, the hoisting end of the hoisting device 400 is used for hoisting the material, and then the moving device 200 is controlled to drive the beam 300 to move so as to transport the material hoisted by the hoisting device 400 to a specified position.

In the embodiment, each bridge frame 100 is provided with a walking trolley 1 in a sliding manner, each walking trolley 1 is in a free sliding form, and a connecting frame 2 which is perpendicular to the bridge frame 100 is fixedly connected between the two walking trolleys 1, so that the connecting frame 2 can freely slide along the length direction of the bridge frame 100; the connecting frame 2 is provided with a sliding element 3 in a sliding manner, and the sliding element 3 is in a free sliding manner, so that the sliding element 3 can slide freely along the length direction of the connecting frame 2, namely, the sliding element 3 can slide freely along the direction perpendicular to the length direction of the bridge frame 100.

A limiting rod 4 is arranged between the sliding part 3 and the hoisting end of the hoisting device 400, the limiting rod 4 is of a round rod-shaped structure, one end of the limiting rod 4 is hinged with the sliding part 3, and the other end of the limiting rod is hinged with the hoisting end of the hoisting device 400.

When the moving device 200 operates, the lifting device 400 can be driven by the beam 300 to move to a lifting station and lift the material, and in the process of lifting the material by the lifting device 400, under the combined action of the gravity of the material and the tensile force of the steel wire rope, the lifting end of the lifting device 400 can push the connecting frame 2 to freely slide along the length direction of the bridge frame 100 through the limiting rod 4, so that the connecting frame 2 can move relative to the beam 300.

In the present embodiment, a limiting mechanism 5 is provided between the slider 3 and the lifting device 400, the limiting mechanism 5 is used for limiting the relative movement between the cross beam 300 and the connecting frame 2 when the moving device 200 is operated, and the limiting mechanism 5 is used for releasing the limitation when the lifting device 400 is operated.

Therefore, when the novel bridge crane is used for hoisting and transporting materials, the method comprises the following steps:

and S1, the moving device 200 operates to enable the beam 300 to drive the lifting device 400 to move to a lifting station, and at the moment, the limiting mechanism 5 limits the relative movement between the beam 300 and the connecting frame 2 to enable the connecting frame 2 to synchronously move to the lifting station along with the beam 300.

S2, the hoisting device 400 operates to hoist the material, at the moment, the limit of the relative movement between the cross beam 300 and the connecting frame 2 is released through the limiting mechanism 5, so that the hoisting end of the hoisting device 400 can push the connecting frame 2 to freely slide along the length direction of the bridge frame 100 through the limiting rod 4, and the connecting frame 2 can move relative to the cross beam 300.

And S3, the moving device 200 operates again to transport the material hoisted by the hoisting device 400 to the designated position, and at the moment, the limiting mechanism 5 enables the connecting frame 2 to synchronously move to the designated position along with the crossbeam 300 by limiting the relative movement between the crossbeam 300 and the connecting frame 2.

Thus circulating.

Move at mobile device 200 to the in-process of transporting the material that hoisting apparatus 400 hoisted to assigned position department, stop gear 5 makes link 2 and 300's interval keep invariable through the relative movement between restriction crossbeam 300 and link 2, thereby makes link 2 form the support limiting displacement to hoisting apparatus 400's hoisting end through gag lever post 4, reduces rocking of material, thereby reduces the threat that the material rocked and produced the control workman.

Referring to fig. 1 and 2, in particular, in the present embodiment, the limiting mechanism 5 includes a connecting rod 51 and a limiting assembly 52, wherein one end of the connecting rod 51 is fixedly connected to the sliding member 3, the other end of the connecting rod 51 is slidably disposed in a sliding hole 53 preset in the lifting apparatus 400, and a rack 54 extending along a length direction of the connecting rod 51 is fixedly disposed on one side of the connecting rod 51, so that when the connecting frame 2 moves relative to the cross beam 300, the connecting rod 51 drives the rack 54 to slide in the sliding hole 53.

The lifting device 400 is rotatably provided with a rotating shaft perpendicular to the connecting rod 51, and the rotating shaft is fixedly provided with a gear 55 engaged with the rack 54, so that when the connecting rod 51 drives the rack 54 to slide in the sliding hole 53, the rack 54 drives the gear 55 and the rotating shaft to rotate through engagement.

The limiting component 52 is disposed in the lifting apparatus 400, and the limiting component 52 includes a belt wheel 521, a belt 522 and a first driving member 523, where the first driving member 523 is an air cylinder in this embodiment, and the first driving member 523 is fixedly disposed in the lifting apparatus 400; the belt wheel 521 is fixedly arranged on the rotating shaft, namely, the belt wheel 521 and the gear 55 share the same rotating shaft; one end of the belt 522 is fixedly connected to a fixed block 524 preset in the lifting apparatus 400, one end of the belt 522 away from the fixed block 524 is wound around the periphery of the pulley 521, and one end of the belt 522 away from the fixed block 524 is fixedly connected to the piston rod of the first driver 523.

In the process that the moving device 200 operates to enable the beam 300 to drive the hoisting device 400 to move to a hoisting station/to transport a material hoisted by the hoisting device 400 to a specified position, the first driving member 523 operates to tension the belt 522, so that the friction force between the belt 522 and the belt wheel 521 is increased, and the rotation of the belt wheel 521, the rotating shaft and the gear 55 is limited by the friction force, thereby limiting the sliding of the connecting rod 51 and the rack 54 in the sliding hole 53, further limiting the relative movement between the beam 300 and the connecting frame 2, keeping the distance between the beam 300 and the connecting frame 2 constant, enabling the connecting frame 2 to form a supporting and limiting effect on the hoisting end of the hoisting device 400 through the limiting rod 4, and reducing the shaking of the material, thereby reducing the threat of the shaking of the material to the operation and control of workers.

In the process that the hoisting device 400 operates to hoist the material, the first driving member 523 operates to loosen the belt 522, so that the friction force between the belt 522 and the belt wheel 521 is eliminated, the belt wheel 521, the rotating shaft and the gear 55 can normally rotate, the connecting rod 51 and the rack 54 can normally slide in the sliding hole 53, that is, the limitation of the relative movement between the cross beam 300 and the connecting frame 2 is removed, and the hoisting end of the hoisting device 400 can push the connecting frame 2 to freely slide along the length direction of the bridge frame 100 through the limiting rod 4, thereby completing the process of hoisting the material.

Referring to fig. 1 and 3, in this embodiment, each end of the bridge 100 is provided with a damping device 6 for damping the moving device 200.

Specifically, the buffering device 6 includes an installation seat 61, a buffering block 62 and buffering springs 63, wherein the installation seat 61 is fixedly disposed at the end of the bridge 100, and a sliding groove 64 extending along the length direction of the bridge 100 and adapted to slide along the sliding block is disposed on one side of the installation seat 61 facing the moving device 200, so that the buffering block 62 can be slidably inserted into the sliding groove 64, the buffering springs 63 are disposed in plural, the buffering springs 63 are uniformly distributed along the center of the sliding groove 64, and two ends of each buffering spring 63 are respectively connected to the bottom of the sliding groove 64 and the buffering block 62, so that when the buffering block 62 is not subjected to an external force, part of the buffering springs is slidably inserted into the sliding groove 64, and part of the buffering springs is exposed out of the sliding groove 64.

Move at mobile device 200, in order to transport the in-process of assigned position department with the material that hoisting apparatus 400 hoisted, under stop gear 5 and gag lever post 4's combined action, can reduce rocking of material, make mobile device 200's transport speed can improve, and when mobile device 200 removed crane span structure 100 end, mobile device 200 compressed buffer spring 63 with buffer block 62 looks butt, thereby utilize buffer spring 63's elasticity to carry out the speed reduction fast to mobile device 200, it takes place to reduce the condition that mobile device 200 and mount pad 61 collided each other, improve novel bridge crane's security.

In this embodiment, a plurality of slots 65 are formed in one side of the buffer block 62 and arranged along the length direction of the buffer block, the cross section of each slot 65 is a right triangle, and the side wall of each slot 65 close to one side of the buffer spring 63 is a vertical surface.

A clamping assembly 66 which is matched with any clamping groove 65 in a clamping manner is arranged in the mounting seat 61. Specifically, the clamping assembly 66 comprises a shifting rod 661, a return spring 662 and a fixture block 663, wherein the shifting rod 661 is located above the buffer block 62, and the middle portion of the shifting rod 661 is hinged to a hinge block 664 preset in the mounting seat 61; the fixture block 663 is fixedly arranged at one end of the shifting rod 661, and the cross section of the fixture block 663 is in a right-angled triangle, so that the fixture block 663 can be clamped with any one of the clamping grooves 65; the return spring 662 is connected between the shift lever 661 and the hinge block 664 and is used for driving the shift lever 661 to rotate, so that the fixture block 663 penetrates through the preset avoiding hole 665 in the groove wall of the sliding groove 64 under the shifting of the shift lever 661, and is clamped with the corresponding clamping groove 65 on the buffer block 62.

The mounting seat 61 is internally and fixedly provided with a second driving member 67 for driving the clamping component 66 to exit from the clamping groove 65, the second driving member 67 in the embodiment is an air cylinder, the second driving member 67 is positioned right above one end of the shifting rod 661 far away from the clamping block 663, and a piston rod of the second driving member 67 is arranged vertically downwards.

When the mobile device 200 abuts against the buffer block 62 and compresses the buffer spring 63, the fixture block 663 passes through a preset avoidance hole 665 in the groove wall of the sliding groove 64 and is clamped with the corresponding fixture groove 65 on the buffer block 62 under the combined action of the return spring 662 and the deflector rod 661, so that the buffer block 62 cannot rebound under the elastic force of the return spring 662, and the buffer spring 63 accumulates certain elastic force; after the lifting device 400 finishes unloading the materials, the second driving part 67 pushes the shifting lever 661 to rotate, so that the fixture block 663 exits from the fixture slot 65, the buffer block 62 pushes the mobile device 200 under the action of the elastic force of the buffer spring 63, the load is reduced when the mobile device 200 is started, and the driving part in the mobile device 200 is protected to a certain extent.

In this embodiment, demountable installation has a plurality of balancing weights 7 on the link 2, and a plurality of balancing weights 7 pile up each other on link 2, can improve link 2 and walking dolly 1's whole weight to improve link 2 and walking dolly 1's overall stability.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a novel bridge crane, includes two crane span structure (100) that set firmly respectively in the workshop both sides, two respectively movably set up mobile device (200) on two crane span structure (100), connect crossbeam (300) between two mobile device (200) and movably set up hoisting apparatus (400) on crossbeam (300), its characterized in that: the crane further comprises two walking trolleys (1) movably arranged on the two bridge frames (100) respectively, a connecting frame (2) connected between the two walking trolleys (1), a sliding piece (3) movably arranged on the connecting frame (2) and a limiting rod (4), one end of the limiting rod (4) is hinged to the sliding piece (3), the other end of the limiting rod is hinged to the hoisting end of the hoisting device (400), a limiting mechanism (5) is arranged between the sliding piece (3) and the hoisting device (400), and the limiting mechanism (5) is used for limiting relative movement between the cross beam (300) and the connecting frame (2) when the moving device (200) runs and removing limitation when the hoisting device (400) runs.

2. The novel bridge crane as claimed in claim 1, wherein: the limiting mechanism (5) comprises a connecting rod (51) and a limiting assembly (52), one end of the connecting rod (51) is fixedly connected with the sliding piece (3), the other end of the connecting rod is slidably arranged in a sliding hole (53) which is preset in the hoisting device (400), a rack (54) which extends along the length direction of the connecting rod (51) is fixedly arranged on one side of the connecting rod (51), a gear (55) which is meshed with the rack (54) is rotatably arranged in the hoisting device (400), the limiting assembly (52) is arranged in the hoisting device (400), and the limiting assembly (52) is used for limiting the rotation of the gear (55) when the moving device (200) operates and removing the limitation when the hoisting device (400) operates.

3. The novel bridge crane as claimed in claim 2, wherein: the limiting assembly (52) comprises a belt wheel (521), a belt (522) and a first driving piece (523), the belt wheel and the belt share the same rotating shaft with the gear (55), one end of the belt (522) is fixedly connected with a preset fixing block (524) in the hoisting device (400), the other end of the belt is wound on the periphery of the belt wheel (521), the first driving piece (523) is fixedly arranged in the hoisting device (400), and the first driving piece (523) is used for tensioning the belt (522) when the moving device (200) operates and loosening the belt (522) when the hoisting device (400) operates.

4. The novel bridge crane as claimed in claim 1, wherein: still include two buffer (6) that set up respectively on two crane span structures (100), every buffer (6) all including setting firmly mount pad (61), buffer block (62) and buffer spring (63) on crane span structure (100), buffer block (62) slip inlays and locates in mount pad (61) spout (64) that predetermine towards mobile device (200) one side, buffer spring (63) both ends are connected with spout (64) tank bottom and buffer block (62) respectively.

5. The novel bridge crane as claimed in claim 4, wherein: buffer block (62) one side is seted up a plurality of draw-in grooves (65) of arranging along its length direction, be equipped with in mount pad (61) with joint subassembly (66) of arbitrary draw-in groove (65) looks joint adaptation, just set firmly in mount pad (61) and be used for driving second driving piece (67) that joint subassembly (66) exited from draw-in groove (65).

6. The novel bridge crane as claimed in claim 5, wherein: joint subassembly (66) include driving lever (661), reset spring (662) and fixture block (663), preset articulated piece (664) is articulated mutually in driving lever (661) middle part and mount pad (61), fixture block (663) sets firmly in driving lever (661) one end, reset spring (662) are connected between driving lever (661) and articulated piece (664) and are used for driving lever (661) to rotate to make fixture block (663) pass that spout (64) cell wall is preset dodge hole (665) and with corresponding draw-in groove (65) looks joint.

7. The novel bridge crane as claimed in claim 6, wherein: the buffer springs (63) are arranged in a plurality, and the buffer springs (63) are uniformly distributed along the center of the sliding groove (64).

8. The novel bridge crane as claimed in claim 1, wherein: a plurality of balancing weights (7) are detachably mounted on the connecting frame (2).