CN118495367A

CN118495367A - Bridge crane

Info

Publication number: CN118495367A
Application number: CN202410946960.0A
Authority: CN
Inventors: 李晓明; 赵梓儒; 刘路; 宋宇飞; 荆赫
Original assignee: Zibo Special Equipment Inspection And Research Institute
Current assignee: Zibo Special Equipment Inspection And Research Institute
Priority date: 2024-07-16
Filing date: 2024-07-16
Publication date: 2024-08-16
Anticipated expiration: 2044-07-16
Also published as: CN118495367B

Abstract

The invention discloses a bridge crane, and relates to the technical field of cranes. The bridge crane comprises a trolley assembly, wherein the trolley assembly comprises a vehicle body, a main lifting rope and a winding structure arranged on the vehicle body and used for winding and unwinding the main lifting rope, and a lifting hook assembly is arranged at the lower end of the main lifting rope; further comprises: the cart assembly comprises a cart beam, wherein limiting upright posts are fixedly arranged below two ends of the cart beam, and the limiting upright posts and the cart beam synchronously move; the positioning assembly main body comprises a synchronous hoisting block capable of vertically moving in a limiting upright post, an electric winch is arranged on one side of the synchronous hoisting block, which is far away from the limiting upright post, a pull rope is wound on the electric winch, the bridge crane can adapt to the condition that goods caused by windy weather sway greatly, and is applicable to the bridge crane with larger height, and the positive effect can be achieved on equipment stability.

Description

Bridge crane

Technical Field

The invention relates to the technical field of cranes, in particular to a bridge crane.

Background

When the crane works outdoors, the crane can swing to the lifting appliance under the action of wind force, and in order to reduce the swinging degree of the crane cable in the use process, some cranes can reduce the swinging amplitude of the cable by shortening the length of the steel cable.

In particular, chinese patent CN111792527a (document one) discloses a single-beam crane with an anti-sway mechanism, which adopts a structure that a spring is arranged between buffer mechanisms to prevent sway, but the telescopic rod structure adopted by the crane is still in the form of a rigid guide rod, while the swing of a lifting appliance can be effectively prevented, the heavier the lifted material is, the greater the inertia is, the greater the impact on starting and braking of running is, and the brittle fracture is easily caused in the process of lifting heavy objects, so that the operation danger is generated.

More particularly, a swing-preventing crane is proposed in CN116768051a (document two), which is connected to a supporting mechanism through a broken column, and swings during the lifting of the supporting mechanism, the broken column is slightly bent and deformed to avoid brittle fracture of a conventional rigid guide rod, and the small deformation is stopped due to extrusion of adjacent cubes, so as to reduce the swing amplitude.

However, the two anti-swing modes have certain defects:

1. in the first document, since the telescopic structure is rigid, the telescopic structure occupies a certain space in the height direction of the device, especially for a bridge crane with a large height, the telescopic rod is shortened to a position where the telescopic rod needs to reach the cross beam at the shortest time, and when the telescopic structure stretches to the maximum position, the telescopic structure needs to reach the position of the ground cargo.

2. In the second document, the broken section column ascends along with the goods, if the broken section column and the supporting rod want to perform anti-swing operation in the whole lifting process, the lower end of the outer cylinder cannot be arranged lower (for example, when the lower end of the outer cylinder is arranged at the middle point of the supporting frame, the broken section column can completely enter the outer cylinder when moving to the middle point height of the supporting frame, so that the broken section column can only limit the goods swing by means of the supporting rod hardness, and the supporting rod breaks due to brittleness in the heavy object lifting process), so that the height of the outer cylinder needs to be extended upwards until the length of the outer cylinder in the vertical direction is close to the length of the cantilever in the vertical direction; but it can also only be applied to cranes of lower height, which obviously would result in an excessive height of the outer cylinder, affecting the stability of the apparatus, when applied to cranes of greater height.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a bridge crane, which solves the problem that a structure for preventing swinging in the prior art is not suitable for a crane with larger height.

In order to achieve the above purpose, the invention is realized by the following technical scheme: the bridge crane comprises a trolley assembly, wherein the trolley assembly comprises a vehicle body, a main lifting rope and a winding structure arranged on the vehicle body and used for winding and unwinding the main lifting rope, and a lifting hook assembly is arranged at the lower end of the main lifting rope; further comprises: the cart assembly comprises a cart beam, wherein limiting upright posts are fixedly arranged below two ends of the cart beam, and the limiting upright posts and the cart beam synchronously move; the locating component main body comprises a synchronous hoisting block capable of vertically moving in the limiting upright post, an electric winch is arranged on one side, away from the limiting upright post, of the synchronous hoisting block, a pull rope is wound on the electric winch, the other end of the pull rope is arranged on the lifting hook component, and the pull rope can be tightened through the electric winch so as to limit the swinging range of the lifting hook component.

Further, the synchronous hoisting block is a sliding block, and the electric winch is arranged on the sliding block.

Further, the synchronous hoisting blocks are bearing seats, two groups of bearing seats are arranged, the two groups of bearing seats can slide in the vertical direction of the limiting upright post, a telescopic assembly is arranged between the two groups of bearing seats, the telescopic assembly is of a hard structure, and the electric winch is arranged at the telescopic output end of the telescopic assembly; the telescopic component can extend or retract along the direction vertical to the limiting upright post so as to enable the electric winch to be close to or far away from the lifting hook component.

Further, the telescopic assembly comprises a bidirectional screw rod rotatably arranged between the two groups of bearing seats, a nut symmetrically connected with the bidirectional screw rod in a threaded mode, a moving block positioned in the middle of one side of the bidirectional screw rod close to the lifting hook assembly, and a push rod hinged between the moving block and the nut, and a screw rod driving motor for driving the bidirectional screw rod to rotate is arranged on the bearing seats.

Further, one or more pull ropes are arranged, and the plurality of pull ropes are arranged into a fan-shaped structure; the electric winch is characterized by further comprising a guide wheel, wherein the guide wheel is used for winding the plurality of pull ropes back to the electric winch.

Further, one end of the pull rope, which is close to the lifting hook component, is fixedly provided with an anti-falling hook, and the lifting hook component is provided with a hanging ring which is matched with the anti-falling hook, so that the pull rope is locked on the lifting hook component.

Further, the device also comprises a windproof winding drum, wherein the windproof winding drum is arranged on the girder, a windproof hanging rope is wound on the windproof winding drum, and the lower end of the windproof hanging rope is fixedly connected with the synchronous hanging block; the wind-proof winding drum is used for winding and unwinding the wind-proof lifting rope at the same speed as the winding structure is used for winding the main lifting rope, so that the pull rope and the lifting hook component synchronously lift.

Further, the cart beam comprises a cart main beam and cart end beams arranged at two ends of the cart main beam; the trolley assembly further comprises a trolley track fixed on the upper surface of the main girder of the large trolley, trolley wheels matched with the trolley track are fixedly arranged on the lower surface of the trolley body, and a motor for driving the trolley wheels to rotate is arranged on the trolley body; the winding structure comprises a winding drum arranged above the vehicle body, a winding motor arranged on the upper surface of the vehicle body and a reduction gear set used for connecting the power output end of the winding motor and the winding drum; a transmission assembly is arranged between the wind-proof winding drum and the power output end of the winding motor, so that the winding motor drives the wind-proof winding drum to rotate.

Further, the transmission assembly includes: the limiting rotating shaft stretches across the main girder of the cart and is rotatably arranged above the main girder of the cart; the supporting seat is fixed on one side of the upper surface of the vehicle body, the supporting seat is rotatably provided with a supporting cylinder, and the limiting rotating shaft penetrates through the supporting cylinder; the second umbrella wheel is rotatably arranged on the vehicle body through the positioning seat, the limiting rotating shaft is embedded in the second umbrella wheel, the limiting rotating shaft and the second umbrella wheel can relatively move in the axial direction of the limiting rotating shaft, the power output end of the winding motor is fixedly provided with the first umbrella wheel, and the first umbrella wheel is meshed with the second umbrella wheel; the worm wheel is arranged at one end of the windproof winding drum, and a worm part meshed with the worm wheel is fixedly arranged on the limiting rotating shaft.

Further, the device also comprises an upper rail platform, wherein two ends of the cart beam are carried above the upper rail platform, a cart rail is arranged on the upper rail platform, the lower surface of the cart beam is provided with cart wheels which are matched with the cart rail, and a motor for driving the cart wheels to rotate is arranged on the cart beam; a lower rail platform is arranged below the upper rail platform, and a support column is arranged between the upper rail platform and the lower rail platform; the lower end of the limiting upright post is fixedly provided with a bottom wheel, and the upper surface of the lower rail table is provided with a bottom rail matched with the bottom wheel.

The invention has the following beneficial effects:

1. This bridge crane sets up spacing stand in the both ends below of girder to set up synchronous hoist and mount piece in spacing stand, and set up electric winch and the stay cord that can provide tensile to the lifting hook subassembly between synchronous hoist and mount piece and lifting hook subassembly, spacing stand can restrict synchronous hoist and mount piece and remove in the horizontal direction, thereby restrict the position of stay cord, make stay cord, main lifting rope form the form of three-point location to the lifting hook subassembly, can restrict the swing scope of lifting hook subassembly then, make this device can adapt to the condition that the goods that the strong wind weather led to sways by a wide margin.

2. According to the bridge crane, the limiting upright posts are positioned on the two sides of the girder, so that the condition of occupying a lifting space cannot occur, the vertical movement of the positioning component main body is realized by rope lifting, the condition of insufficient telescopic length cannot occur, and the bridge crane is suitable for the bridge crane with larger height.

3. This bridge crane, spacing stand can restrict synchronous hoist and mount piece and remove in the horizontal direction to spacing stand can not have lower limit downwardly extending, until reaching ground, can not influence equipment height, and because it extends to ground, can also play positive effect to equipment stability.

4. This bridge crane has set up electric capstan for the stay cord to when the goods moves on the dolly track along with the dolly subassembly, electric capstan can control the effective length of using of both sides stay cord, satisfies the harmony in the complete machine course of working.

Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.

Drawings

FIG. 1 is an overall view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic view of a portion of the structure of the present invention;

FIG. 4 is a schematic diagram of a portion of a first embodiment of the present invention;

FIG. 5 is a schematic diagram of a portion of a first embodiment of the present invention;

FIG. 6 is a front view of FIG. 5 in accordance with the present invention;

FIG. 7 is a schematic view of a plurality of pull cords according to a first embodiment of the present invention;

FIG. 8 is an enlarged view of area A of FIG. 3 in accordance with the present invention;

FIG. 9 is a schematic diagram of a transmission assembly of the present invention;

FIG. 10 is a schematic structural diagram of a positioning assembly according to a second embodiment of the present invention;

Fig. 11 is a schematic diagram of a plurality of pull ropes according to a second embodiment of the invention.

In the figure, 11, a lower rail platform; 12. a rail mounting table; 13. a support column; 2. a cart assembly; 21. end beams of the cart; 22. a main girder of the cart; 23. a protective fence; 24. a limit upright post; 241. a bottom wheel; 242. a guide post; 3. a trolley assembly; 31. a vehicle body; 32. winding up a winding drum; 33. a winding motor; 34. a reduction gear set; 35. a trolley track; 36. a main lifting rope; 4. a transmission assembly; 41. a limiting rotating shaft; 42. a worm part; 43. a worm wheel; 44. a second umbrella wheel; 45. a first umbrella wheel; 46. a positioning seat; 47. a support base; 471. a support cylinder; 5. a hook assembly; 51. a hook body; 52. a housing; 53. an inner movable pulley; 54. hanging rings; 6. a positioning assembly body; 61. synchronous hoisting blocks; 62. an electric winch; 63. a pull rope; 64. an anti-falling hook; 65. a telescoping assembly; 651. a nut; 652. a two-way screw rod; 654. a push rod; 655. a moving block; 66. a screw rod driving motor; 68. a guide wheel; 71. a wind-proof winding drum; 72. a wind-proof hanging rope; 8. and a cab.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The bridge crane provided by the embodiment of the invention is described below with reference to fig. 1 to 11.

Embodiment one:

Referring to fig. 1 and 2, an embodiment of the present invention provides a bridge crane, including a trolley assembly 3, where the trolley assembly 3 includes a vehicle body 31, a winding structure is mounted on the vehicle body 31, a main lifting rope 36 for lifting a load is disposed on the winding structure, a hook assembly 5 is disposed at a lower end of the main lifting rope 36, when the winding structure winds the main lifting rope 36, the main lifting rope 36 is in a state of lifting the hook assembly 5, otherwise, when the winding structure unwinds the main lifting rope 36, the main lifting rope 36 is in a state of releasing the hook assembly 5 (corresponding brake should also be provided for the winding structure, since this is not a main technical problem to be solved by the present invention, and will not be repeated here).

Still include cart subassembly 2, cart subassembly 2 includes the cart roof beam that is formed by cart end beam 21 and cart owner roof beam 22, has set firmly spacing stand 24 in the both ends below of cart roof beam, because both are the rigid coupling state, so spacing stand 24 can remove with cart roof beam synchronization.

With reference to fig. 2-4, the positioning component main body 6 is assembled on the positioning component main body 24 by arranging the positioning column 24 capable of generating displacement along with the girder, and the positioning component main body 6 is used for directly positioning and positioning the hook component 5, so that the condition that the swing amplitude of goods caused by the swing of the hook component 5 in the lifting process is large is reduced.

Referring to fig. 2-5, specifically, the positioning assembly main body 6 includes a synchronous hoisting block 61 capable of moving vertically in the limiting upright 24, an electric winch 62 is disposed on one side of the synchronous hoisting block 61 away from the limiting upright 24, a pull rope 63 is wound on the electric winch 62, the other end of the pull rope 63 is mounted on the hook assembly 5, the electric winch 62 can wind and unwind the pull rope 63 during operation, when the electric winch 62 winds the pull rope 63, and the pull ropes 63 on two sides and the main hoisting rope 36 above can form a three-point positioning mode for the hook assembly 5, so that the swing range of the hook assembly 5 can be limited.

In addition, the swing range of the hook assembly 5 is limited, and the hook assembly 5 is not locked in the pulling direction of the pulling rope 63, because the pulling rope 63 is in a tightening state, but when the external wind force is too large, the cargo itself swings to a certain extent, and the pulling rope 63 deforms to a certain extent.

Moreover, when the wind power is too large, the tendency of the cargo to swing is larger, if the electric winch 62 tightens the pull rope 63 too much, the stress of the cargo to the pull rope 63 is larger, and the pull rope 63 is likely to be broken, so when the wind power is too large, the tension of the electric winch 62 to the pull rope 63 is reduced, even the pull rope 63 is not tightened, a certain length is reserved for the pull rope 63 to correspond to the swing amplitude of the cargo, the stress of the cargo to the pull rope 63 is reduced, and the situation that the pull rope 63 is broken is avoided.

Therefore, the bridge crane provided by the embodiment of the invention has the advantages that the limiting upright posts 24 are arranged below the two ends of the girder, the synchronous lifting blocks 61 are arranged in the limiting upright posts 24, the pull ropes 63 which can provide tension for the lifting hook assemblies 5 are arranged between the synchronous lifting blocks 61 and the lifting hook assemblies 5, the limiting upright posts 24 can limit the synchronous lifting blocks 61 to move in the horizontal direction, so that the positions of the pull ropes 63 are limited, the pull ropes 63 and the main lifting ropes 36 form a three-point positioning form for the lifting hook assemblies 5, and then the swinging range of the lifting hook assemblies 5 can be limited, so that the bridge crane can adapt to the condition that goods swing greatly caused by windy weather.

And because the spacing stand 24 in this device is located the both sides of girder, so the condition that occupies the space of lifting by crane can not appear, the vertical removal of locating component main part 6 is the rope hoist and mount realization, so the condition that flexible length is insufficient can not appear, realizes that higher bridge crane also can fix a position the purpose of lifting hook position.

Furthermore, the spacing stand 24 can restrict synchronous hoist and mount piece and remove in the horizontal direction to spacing stand 24 can not have the lower extreme downwardly extending, until reaching ground, can not influence equipment height, and because it extends to ground, can not cause the influence to equipment height, can also play positive effect to equipment stability.

As shown in fig. 1 and 2, in order to achieve the purpose of transferring goods in the first horizontal direction (set as the Y-axis direction), the bridge crane provided by the embodiment of the invention further comprises a top rail 12, two ends of the cart beam are carried above the top rail 12, cart rails are arranged on the top rail 12, cart wheels adapted to the cart rails are arranged on the lower surface of the cart beam, a motor for driving the cart wheels to rotate is arranged on the cart beam, and when the motor works, the cart wheels rotate, and then the cart beam can move on the top rail 12, so that the purpose of carrying goods in the first horizontal direction is achieved.

As shown in fig. 1, a lower rail table 11 is arranged below an upper rail table 12, and a support column 13 is arranged between the upper rail table 12 and the lower rail table 11; the bottom wheel 241 is fixedly arranged at the lower end of the limiting upright post 24, and a bottom rail matched with the bottom wheel 241 is arranged on the upper surface of the lower rail table 11, so that the weight of the limiting upright post 24 is not fully concentrated on the girder, but part of the weight is dispersed to the ground, and the load of the girder is reduced.

As shown in fig. 1 to 6, the synchronized hoisting block 61 is a slider, the electric winch 62 is directly mounted on the slider, and the slider slides up and down in the limiting upright 24 to drive the pull rope 63 and the electric winch 62 to move vertically.

Preferably, the sliding block is a T-shaped sliding block, and the inner cavity of the limiting upright post 24 is a T-shaped cavity, that is, the T-shaped cavity is used as a T-shaped sliding groove for sliding of the T-shaped sliding block.

Further, balls or rollers are assembled on the slider to reduce wear between the inner wall of the spacing posts 24 and the slider.

In addition, it is preferable that a guide post 242 is fixed in the vertical direction in the stopper post 24, and the guide post 242 passes through the synchronization hanging block 61, thereby guiding the synchronization hanging block 61 so that the synchronization hanging block 61 can move more stably.

As shown in fig. 2 and 7, in fact, one or more pull cords 63 may be provided, and when a plurality of pull cords 63 are provided, the plurality of pull cords 63 are arranged in a fan-shaped structure (in the state shown in fig. 7, the tips of the fan-shaped structure are close to the hook assembly 5), and the more the number of pull cords 63, the smaller the load stress the single pull cord 63 receives, and similarly, the more the number of pull cords 63 can receive the larger load stress.

The plurality of pull cords 63 are arranged in a fan-shaped configuration, because the pull direction of each pull cord 63 to the hook assembly 5 is different, thereby enabling the hook assembly 5 to be pulled in different directions, further improving the stability of the hook assembly 5.

Preferably, a guide wheel 68 is provided for the plurality of ropes 63, and the guide wheel 68 can wind the plurality of ropes 63 back onto the electric winch 62, thereby realizing that one electric winch 62 winds or unwinds the plurality of ropes 63 at the same time.

In addition, in the present embodiment, the guide wheel 68 is fixed to the synchronous hoisting block 61.

Furthermore, when a plurality of ropes 63 are provided, since the guide wheels 68 are required to be provided on the synchronized hoisting blocks 61, the length of the synchronized hoisting blocks 61 is required to be increased to reserve a space for installing the guide wheels 68 (see fig. 7).

As shown in fig. 3 and 8, in order to fix the pull rope 63 on the hook assembly 5 conveniently, an anti-falling hook 64 is fixed at one end of the pull rope 63 near the hook assembly 5, and the hook assembly 5 is provided with a hanging ring 54 matched with the anti-falling hook 64, so that the pull rope 63 is locked on the hook assembly 5, and the pull rope 63 and the hook assembly 5 can be separated conveniently by adopting a hook mode.

As shown in fig. 8, the hook assembly 5 preferably includes a housing 52, an inner movable pulley 53 provided in the housing 52, and a hook body 51 mounted under the housing 52, and a hanger 54 mounted on both sides of the housing 52.

In order to realize the hoisting of the synchronous hoisting block 61, as shown in fig. 1, 4 and 5, the bridge crane provided by the embodiment of the invention further comprises a wind-proof drum 71, the wind-proof drum 71 is arranged on a girder, a wind-proof hoisting rope 72 is wound on the wind-proof drum 71, the lower end of the wind-proof hoisting rope 72 is fixedly connected with the synchronous hoisting block 61, when the wind-proof drum 71 winds the wind-proof hoisting rope 72, the synchronous hoisting block 61 is in a rising state, otherwise, when the wind-proof drum 71 unwinds the wind-proof hoisting rope 72, the synchronous hoisting block 61 is in a falling state so as to realize the vertical movement of the pull rope 63.

In addition, it should be noted that, the winding and unwinding speed of the wind-proof winding drum 71 to the wind-proof lifting rope 72 is equal to the winding speed of the winding structure to the main lifting rope 36, so that the pull rope 63 and the lifting hook assembly 5 can be lifted synchronously, and the situation that the pull rope 63 is stretched due to displacement deviation of the pull rope 63 is avoided.

As shown in fig. 1 to 3, in order to enable the trolley body 31 to move on the trolley beam along the X-axis direction perpendicular to the Y-axis direction so as to implement displacement in the X-axis direction, the trolley assembly 3 further includes a trolley rail 35 fixed on the upper surface of the trolley body 22, a trolley wheel adapted to the trolley rail 35 is fixedly arranged on the lower surface of the trolley body 31, and a motor for driving the trolley wheel to rotate is arranged on the trolley body 31, and when the motor works, the trolley wheel can rotate and further walk on the trolley rail 35 so that the whole trolley assembly 3 can move on the X-axis.

As shown in fig. 1, the above-mentioned winding structure includes a winding drum 32 disposed above the vehicle body 31, a winding motor 33 mounted on the upper surface of the vehicle body 31, and a reduction gear set 34 for connecting the power output end of the winding motor 33 with the winding drum 32.

In this embodiment, when the winding motor 33 is operated, the reduction gear set 34 can reduce the speed of the winding motor and transmit power to the winding drum 32, so that the winding drum 32 can rotate to wind and unwind.

As shown in fig. 4, in order to ensure that the wind-proof winding drum 71 winds and unwinds the wind-proof hanging rope 72 at the same speed as the wind-up motor 33 winds and unwinds the main hanging rope 36, a transmission assembly 4 is preferably provided between the wind-proof winding drum 71 and the power output end of the wind-up motor 33 so that the wind-up motor 33 drives the wind-proof winding drum 71 to rotate.

As shown in fig. 4 and 9, the above mentioned transmission assembly 4 includes a limit rotating shaft 41, the limit rotating shaft 41 spans the main girder 22 of the cart, the limit rotating shaft 41 is rotatably mounted above the main girder 22 of the cart and can rotate on the main girder 22 of the cart, a second umbrella wheel 44 is further provided, the second umbrella wheel 44 is rotatably mounted on the vehicle body 31 through a positioning seat 46, the limit rotating shaft 41 is embedded in the second umbrella wheel 44, the limit rotating shaft 41 and the second umbrella wheel 44 can relatively move in the axial direction of the limit rotating shaft 41, a first umbrella wheel 45 is fixed at the power output end of the winding motor 33, and the first umbrella wheel 45 is meshed with the second umbrella wheel 44; therefore, when the winding motor 33 works, the first umbrella wheel 45 can be driven to rotate, and the power of the first umbrella wheel 45 drives the limiting rotating shaft 41 to rotate through the second umbrella wheel 44.

In order to achieve the purpose that the limit rotating shaft 41 drives the wind-proof winding drum 71 to rotate, a worm wheel 43 is further arranged, the worm wheel 43 is arranged at one end of the wind-proof winding drum 71, and a worm part 42 meshed with the worm wheel 43 is fixedly arranged on the limit rotating shaft 41.

In this embodiment, when the limit rotating shaft 41 rotates, the worm part 42 can be driven to rotate, and then the wind-proof drum 71 is driven to rotate by the worm wheel 43.

It should be noted that, when the worm portion 42 transmits power to the worm wheel 43, the power of the winding motor 33 should be decelerated, and the deceleration ratio thereof should be the same as that of the deceleration gear set 34, so as to achieve the same winding and unwinding speed of the winding drum 32 and the wind-proof drum 71.

Preferably, the limiting rotating shaft 41 is a hexagonal prism, and the middle cavity of the second umbrella wheel 44 is also a hexagonal cavity, so that the limiting rotating shaft 41 can drive the second umbrella wheel 44 to rotate.

In addition, when the trolley body 31 moves along the X-axis on the trolley beam along the trolley track 35, the second umbrella wheel 44 can move axially on the limit rotating shaft 41, but this does not affect the second umbrella wheel 44 to drive the limit rotating shaft 41 to rotate.

Furthermore, since most bridge cranes span a large length, the length of the limiting rotating shaft 41 is also large, if the bridge cranes are supported by the supports at two ends, the middle part of the limiting rotating shaft 41 is easy to bend and damage, so the supporting seat 47 is also arranged on the limiting rotating shaft 41, the supporting seat 47 is fixed on one side of the upper surface of the vehicle body 31, the supporting seat 47 is rotatably provided with the supporting cylinder 471, the limiting rotating shaft 41 passes through the supporting cylinder 471, the supporting seat 47 can support the supporting cylinder 471, the supporting cylinder 471 supports the limiting rotating shaft 41, the inner cavity of the supporting cylinder 471 is a circular cavity, and the radius of the circular cavity is the length of the corner of the hexagonal prism-shaped limiting rotating shaft 41 reaching the center, so that the circular cavity has enough radial space to accommodate the limiting rotating shaft 41.

When the trolley body 31 moves along the X-axis on the trolley beam along the trolley track 35, the support seat 47 and the limit rotating shaft 41 are also displaced relatively, but the supporting function of the support seat 47 on the limit rotating shaft 41 is not affected.

In addition, a cab 8 is installed below one side of the girder, and a ladder (not shown) is provided between the cab 8 and the upper surface of the girder, and protective fences 23 are installed at both sides of the girder side.

The invention can also be equipped with an auxiliary hook, the bearing capacity of which is lower than that of the main hook.

During use (during operation), in the state shown in fig. 2, the cargo is hung on the hook body 51, the driver operates in the cab 8, the winding motor 33 is operated at first, the main lifting rope 36 is wound to lift the cargo, meanwhile, the winding motor 33 drives the first umbrella wheel 45 to rotate, the power of the first umbrella wheel 45 drives the limiting rotating shaft 41 to rotate through the second umbrella wheel 44, then the wind-proof winding drum 71 is driven to wind the wind-proof lifting rope 72 through the action of the worm part 42 and the worm wheel 43, synchronous lifting of the pull rope 63 and the cargo can be realized, the pull rope 63 can limit large swing of the cargo at the moment, the safety of equipment is ensured, after the cargo is lifted to a required height, the cargo is lifted to the required height, the position of the cargo is adjusted through the movement of the cart assembly 2 on the upper rail table 12 along the Y axis and the movement of the cart assembly 3 on the cart rail 35 along the X axis, and then the cargo is put down.

It should be noted that, when the trolley assembly 3 moves on the trolley track 35, the driver needs to synchronously operate the electric winch 62 to stretch and retract in the cab 8, for example, after the cargo rises to a required height under the view angle shown in fig. 2, the driver needs to move the cargo to the right, so that the driver controls the trolley assembly 3 to move to the right, and in order to adapt to the position where the cargo and the hook assembly 5 are generated along with the movement of the trolley assembly 3 to the right, the driver also needs to operate the left electric winch 62 to unwind and the right electric winch 62 to wind, so as to increase the length of the left pull rope 63, reduce the length of the right pull rope 63, and meet the coordination during the whole working process.

For convenience of the driver's operation, the control button of the electric capstan 62 and the movement control button of the dolly assembly 3 may also be set to one button, i.e., the electric capstan 62 reacts accordingly while pressing this button to move the dolly assembly 3.

Embodiment two:

As shown in fig. 10 and 11, the difference between this embodiment and the previous embodiment is that the synchronous hoisting block 61 is a bearing seat, two sets of bearing seats are provided, the two sets of bearing seats can slide in the vertical direction of the limiting upright post 24, a telescopic assembly 65 is provided between the two sets of bearing seats, the telescopic assembly 65 is of a hard structure, and the electric winch 62 is mounted at the telescopic output end of the telescopic assembly 65; the retraction assembly 65 can be extended or retracted in a direction perpendicular to the spacing post 24 to bring the electric winch 62 closer to or farther away from the hook assembly 5.

In this embodiment, the original mode of using the pull rope 63 is changed to a mode that a part of the pull rope 63 is used to tighten, and the other part of the pull rope is used to tighten by adopting a hard telescopic structure, so that the distance between the pull rope 63 and the hook assembly 5 can be shortened, that is, the length of the pull rope 63 which is effectively used (the effective use length, that is, the length between the electric winch 62 and the hook assembly 5, is reduced, because the larger the length of the pull rope 63 is, the larger the relative deformation amount is, and the poorer the limiting effect on the hook assembly 5 is), thereby improving the limiting effect on the hook assembly 5.

The above-mentioned telescopic assembly 65 includes a bidirectional screw rod 652 rotatably installed between two sets of bearing blocks, a nut 651 symmetrically screwed to the bidirectional screw rod 652, a moving block 655 positioned at a middle portion of one side of the bidirectional screw rod 652 near the hook assembly 5, and a push rod 654 hinged between the moving block 655 and the nut 651, and a screw rod driving motor 66 for driving the bidirectional screw rod 652 to rotate is installed on the bearing blocks.

In this embodiment, relative or opposite movement of the two sets of nuts 651 is achieved as the bi-directional screw 652 rotates to change the angle of the two pushers 654, thereby adjusting the position of the moving block 655 on the X-axis, as the angle of the two pushers 654 decreases, the moving block 655 gradually approaches the hook assembly 5.

Claims

1. The bridge crane comprises a trolley assembly (3), wherein the trolley assembly (3) comprises a vehicle body (31), a main lifting rope (36) and a winding structure arranged on the vehicle body (31) and used for winding and unwinding the main lifting rope (36), and a lifting hook assembly (5) is arranged at the lower end of the main lifting rope (36);

Characterized by further comprising:

The large car assembly (2), the large car assembly (2) comprises a large car beam, limiting stand columns (24) are fixedly arranged below two ends of the large car beam, and the limiting stand columns (24) and the large car beam synchronously move;

Positioning assembly main part (6), positioning assembly main part (6) are including synchronous hoist and mount piece (61) that can vertical movement in spacing stand (24), one side that spacing stand (24) was kept away from to synchronous hoist and mount piece (61) is equipped with electric capstan (62), the rolling has stay cord (63) on electric capstan (62), the other end of stay cord (63) is installed on lifting hook assembly (5), and stay cord (63) can be stretched tightly through electric capstan (62) to restriction lifting hook assembly (5) swing scope.

2. A bridge crane according to claim 1, characterized in that: the synchronous hoisting block (61) is a sliding block, and the electric winch (62) is arranged on the sliding block.

3. A bridge crane according to claim 1, characterized in that: the synchronous hoisting blocks (61) are bearing seats, two groups of bearing seats are arranged, the two groups of bearing seats can slide in the vertical direction of the limiting upright post (24), a telescopic assembly (65) is arranged between the two groups of bearing seats, the telescopic assembly (65) is of a hard structure, and the electric winch (62) is arranged at the telescopic output end of the telescopic assembly (65);

The telescopic assembly (65) can be extended or retracted in a direction perpendicular to the limit post (24) to bring the electric winch (62) closer to or farther away from the hook assembly (5).

4. A bridge crane according to claim 3, characterized in that: the telescopic assembly (65) comprises a bidirectional screw rod (652) rotatably arranged between two groups of bearing seats, a nut (651) symmetrically connected to the bidirectional screw rod (652) in a threaded mode, a moving block (655) positioned in the middle of one side of the bidirectional screw rod (652) close to the lifting hook assembly (5), and a push rod (654) hinged between the moving block (655) and the nut (651);

and a screw rod driving motor (66) for driving the bidirectional screw rod (652) to rotate is arranged on the bearing seat.

5. A bridge crane according to any one of claims 2 to 4, wherein: one or more pull ropes (63) are arranged, and the plurality of pull ropes (63) are arranged into a fan-shaped structure;

the device further comprises a guide wheel (68), wherein the guide wheel (68) is used for rewinding the plurality of pull ropes (63) onto the electric winch (62).

6. A bridge crane according to claim 5, wherein: one end of the pull rope (63) close to the lifting hook component (5) is fixedly provided with an anti-falling hook (64), and the lifting hook component (5) is provided with a hanging ring (54) matched with the anti-falling hook (64), so that the pull rope (63) is locked on the lifting hook component (5).

7. A bridge crane according to any one of claims 2 to 4, wherein: the wind-proof lifting device further comprises a wind-proof winding drum (71), wherein the wind-proof winding drum (71) is arranged on a girder, a wind-proof lifting rope (72) is wound on the wind-proof winding drum (71), and the lower end of the wind-proof lifting rope (72) is fixedly connected with the synchronous lifting block (61);

The wind-proof winding drum (71) winds and unwinds the wind-proof lifting rope (72) at the same speed as the wind-proof winding structure winds and unwinds the main lifting rope (36) so as to enable the pull rope (63) and the lifting hook assembly (5) to synchronously lift.

8. The bridge crane of claim 7, wherein: the cart girder comprises a cart main girder (22) and cart end girders (21) arranged at two ends of the cart main girder (22);

The trolley assembly (3) further comprises a trolley track (35) fixed on the upper surface of the main girder (22) of the trolley, trolley wheels matched with the trolley track (35) are fixedly arranged on the lower surface of the trolley body (31), and a motor for driving the trolley wheels to rotate is arranged on the trolley body (31);

the rolling structure comprises a rolling barrel (32) arranged above the vehicle body (31), a rolling motor (33) arranged on the upper surface of the vehicle body (31) and a reduction gear set (34) used for connecting the power output end of the rolling motor (33) and the rolling barrel (32);

a transmission component (4) is arranged between the wind-proof winding drum (71) and the power output end of the winding motor (33) so that the winding motor (33) drives the wind-proof winding drum (71) to rotate.

9. A bridge crane according to claim 8, wherein: the transmission assembly (4) comprises:

The limiting rotating shaft (41) stretches across the main girder (22) of the cart, and the limiting rotating shaft (41) is rotatably arranged above the main girder (22) of the cart;

the supporting seat (47), the supporting seat (47) is fixed on one side of the upper surface of the vehicle body (31), the supporting seat (47) is rotatably provided with a supporting cylinder (471), and the limiting rotating shaft (41) penetrates through the supporting cylinder (471);

The second umbrella wheel (44), the second umbrella wheel (44) is rotatably arranged on the vehicle body (31) through a positioning seat (46), the limiting rotating shaft (41) is embedded in the second umbrella wheel (44), the limiting rotating shaft (41) and the second umbrella wheel (44) can relatively move in the axial direction of the limiting rotating shaft (41), a first umbrella wheel (45) is fixedly arranged at the power output end of the winding motor (33), and the first umbrella wheel (45) is meshed with the second umbrella wheel (44);

the worm wheel (43), worm wheel (43) are installed in wind-proof reel (71) one end, limit pivot (41) are last to be set firmly with worm portion (42) of worm wheel (43) meshing.

10. A bridge crane according to any one of claims 2 to 4, wherein: the large-wheel-type vehicle is characterized by further comprising an upper rail table (12), wherein two ends of the large vehicle beam are carried above the upper rail table (12), a large vehicle rail is arranged on the upper rail table (12), large wheels matched with the large vehicle rail are arranged on the lower surface of the large vehicle beam, and a motor for driving the large wheels to rotate is arranged on the large vehicle beam;

A lower rail table (11) is arranged below the upper rail table (12), and a support column (13) is arranged between the upper rail table (12) and the lower rail table (11);

the lower end of the limiting upright post (24) is fixedly provided with a bottom wheel (241), and the upper surface of the lower rail platform (11) is provided with a bottom rail which is matched with the bottom wheel (241);

Guide posts (242) are fixedly arranged in the limiting upright posts (24) along the vertical direction, and the guide posts (242) penetrate through the synchronous hoisting blocks (61) to guide the synchronous hoisting blocks (61).