Novel double-trolley bridge crane

Abstract

A novel double-trolley bridge crane comprises two main beams, end beams are fixed to the ends of the main beams, cart traveling mechanisms are installed on the end beams, trolley tracks are fixed to the tops of the main beams, two trolleys are arranged on the tops of the main beams, lifting devices are fixed to the trolleys, symmetrical anti-tipping devices are installed on the trolleys, and the two trolleys are connected with the cart traveling mechanisms. The anti-tipping device comprises a protection wheel arranged at the bottom of the main beam, a lower rail corresponding to the protection wheel is fixed to the bottom of the main beam, a rotating shaft is rotationally connected to the middle of the protection wheel, the two ends of the rotating shaft extend out of the protection wheel and are fixedly provided with lower assembly rods, and an upper assembly rod is detachably fixed to the side face of the trolley. A connecting rod is fixed between the upper assembling rod and the lower assembling rod; a mounting frame is detachably fixed to the outer side of the lower assembling rod, buffering devices are fixed to the outer side of the mounting frame and the end of the trolley, and limiting devices are fixed to the end of the trolley track and the end of the lower track. The anti-collision device has a good anti-collision function, and the trolley is prevented from tipping over and derailing.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a novel double-girder bridge crane with double trolleys. Background Art

[0002] A bridge crane is a lifting device that spans over workshops, warehouses, and yards for material lifting. Since its two ends are located on tall cement columns or metal brackets, it resembles a bridge. The bridge of the bridge crane runs longitudinally along the tracks laid on both sides of the elevated racks, which can make full use of the space under the bridge to lift materials without being hindered by ground equipment and is widely used. According to the number of main girders, bridge cranes can be divided into single-girder bridge cranes and double-girder bridge cranes. Among them, the double-girder bridge crane includes two main girders. End beams are fixed at the ends of the main girders. Trolley tracks are fixed on the tops of the main girders. Trolleys that can run left and right along the trolley tracks are provided on the tops of the main girders. Electric hoists are fixed on the trolleys. Steel ropes are wound on the electric hoists. Hook assemblies are installed on the steel ropes for hooking and lifting goods. For the convenience of lifting, some cranes are provided with two trolleys on the main girders. The two trolleys can be used separately or in combination. For example, the patent publication number is CN202953737U, and the patent name is a double-trolley crane, which is convenient to use. However, during the use process, due to equipment failures or improper operations, the two trolleys are prone to collide. When the collision is severe, it is prone to tipping and derailing. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a novel double-girder bridge crane with double trolleys, which has a good anti-collision function and can prevent the trolleys from tipping and derailing.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A novel double-girder bridge crane with double trolleys includes two main girders. End beams are fixed at the ends of the main girders. A trolley traveling mechanism is installed on the end beams. Trolley tracks are fixed on the tops of the main girders. Two trolleys that can run along the trolley tracks are provided on the tops of the main girders. Lifting devices are fixed on the trolleys. Anti-tipping devices are symmetrically installed on the trolleys. The anti-tipping device includes protection wheels arranged at the bottom of the main girder. Lower tracks corresponding to the protection wheels are fixed at the bottom of the main girder. A rotating shaft is rotatably connected to the middle of the protection wheel. Both ends of the rotating shaft extend outside the protection wheel and are fixed with lower assembly rods. Upper assembly rods are detachably fixed to the sides of the trolleys. A connecting rod is fixed between the upper assembly rod and the lower assembly rod. There is a gap between the connecting rod and the side of the main girder. Mounting brackets are detachably fixed to the outside of the lower assembly rods. Buffer devices are fixed to the outside of the mounting brackets and the ends of the trolleys. Limit devices corresponding to the buffer devices are detachably fixed to the ends of the trolley tracks and the lower tracks.

[0006] An assembly shaft is fixed to the end of the lower assembly rod. An assembly groove in an inverted U shape is provided at the bottom of the connecting rod. The assembly shaft is arranged in the assembly groove, and the outer end of the assembly shaft extends outside the assembly groove and is threadedly connected with a locking nut.

[0007] Assembly blocks are fixed to both sides of the upper assembly rod. The assembly blocks are detachably fixed to the side of the trolley by bolts.

[0008] Mounting plates are fixed to both ends of the mounting frame. The mounting plates are detachably fixed to the lower assembly rod by screws.

[0009] The buffer device includes a buffer plate and a fixing plate. A plurality of springs are fixed between the buffer plate and the fixing plate. An elastic first buffer pad is fixed to the outer side of the buffer plate. The fixing plate is detachably fixed to the outer side of the mounting frame or the end of the trolley by screws.

[0010] The limiting device includes an assembly plate. A limiting block corresponding to the buffer device is fixed to the assembly plate. An elastic second buffer pad is fixed to the inner side of the limiting block. The assembly plate is detachably fixed to the main beam by bolts.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] (1) Anti-tipping devices are symmetrically installed on the trolleys. The anti-tipping devices include protection wheels arranged at the bottom of the main beam. A lower track corresponding to the protection wheels is fixed to the bottom of the main beam. During the left-right movement of the trolley along the trolley track, the protection wheels move left and right along the lower track, which can prevent the trolley from tipping over and derailing.

[0013] (2) A rotating shaft is rotatably connected to the middle of the protection wheel. Both ends of the rotating shaft extend outside the protection wheel and are fixed to a lower assembly rod. An upper assembly rod is detachably fixed to the side of the trolley. A connecting rod is fixed between the upper assembly rod and the lower assembly rod, which plays a connecting role and facilitates the anti-tipping device to move along with the trolley.

[0014] (3) Buffer devices are fixed to the outer side of the mounting frame and the end of the trolley. Limiting devices corresponding to the buffer devices are detachably fixed to the ends of the trolley track and the lower track, which has a good anti-collision function. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a partial structural diagram of the present utility model;

[0017] Figure 3 is a partial structural diagram of the anti-tipping device;

[0018] Figure 4 is a structural diagram of the upper assembly rod and the connecting rod;

[0019] Figure 5 It is a structural schematic diagram of the limiting device. Specific embodiments

[0020] As Figures 1-5 shown, a new type of double-girder bridge crane includes two main girders 28. End beams 3 are fixed at the ends of the main girders 28. A trolley traveling mechanism 2 is installed on the end beams 3. A trolley track 5 is fixed on the top of the main girders 28. There are two trolleys 6 that can run along the trolley track 5 on the top of the main girders 28. Hoisting devices 7 are fixed on the trolleys 6. Generally, electric hoists are used for the hoisting devices 7 to facilitate hoisting heavy objects. This is the prior art and will not be elaborated here. Anti-tipping devices 8 are symmetrically installed on the trolleys 6. The anti-tipping device 8 includes a protection wheel 16 arranged at the bottom of the main girder 28. A lower track 10 corresponding to the protection wheel 16 is fixed at the bottom of the main girder 28. The protection wheel 16 can run left and right along the lower track 10. A rotating shaft is rotatably connected to the middle of the protection wheel 16. Both ends of the rotating shaft extend outside the protection wheel 16 and are fixed with a lower assembly rod 20. An upper assembly rod 24 is detachably fixed to the side of the trolley 6. A connecting rod 15 is fixed between the upper assembly rod 24 and the lower assembly rod 20 to play a connecting role and facilitate the anti-tipping device 8 to run with the trolley 6. There is a gap between the connecting rod 15 and the side of the main girder 28 to avoid interference between the anti-tipping device 8 and the main girder 28. An installation frame 22 is detachably fixed to the outside of the lower assembly rod 20. The installation frame 22 is U-shaped. Buffer devices 9 are fixed to the outside of the installation frame 22 and the ends of the trolley 6. Limiting devices 4 corresponding to the buffer devices 9 are detachably fixed to the ends of the trolley track 5 and the lower track 10, having a good anti-collision function.

[0021] An assembly shaft 17 is fixed to the end of the lower assembly rod 20. An inverted U-shaped assembly groove 19 is provided at the bottom of the connecting rod 15. The assembly shaft 17 is arranged in the assembly groove 19. The outer end of the assembly shaft 17 extends outside the assembly groove 19 and is threadedly connected with a locking nut 18. During assembly, the assembly shaft 17 at the end of the lower assembly rod 20 enters the assembly groove 19 from the bottom of the assembly groove 19. After the local protection wheel 16 is properly fitted with the lower track 10, the corresponding locking nut 18 is tightened to lock the position of the assembly shaft 17, that is, to lock the position of the protection wheel 16.

[0022] Assembly blocks 23 are fixed to both sides of the upper assembly rod 24. The assembly blocks 23 are detachably fixed to the side of the trolley 6 by bolts, which is convenient for installation and disassembly.

[0023] Installation plates 21 are fixed to both ends of the installation frame 22. The installation plates 21 are detachably fixed to the lower assembly rod 20 by screws, which is convenient for installation and disassembly.

[0024] The buffer device 9 includes a buffer plate 13 and a fixing plate 11. A number of springs 12 are fixed between the buffer plate 13 and the fixing plate 11. An elastic first buffer pad 14 is fixed on the outer side of the buffer plate 13 to play a protective role. The fixing plate 11 is detachably fixed on the outer side of the mounting frame 22 or the end of the trolley 6 by screws, which is convenient for installation and disassembly.

[0025] The limiting device 4 includes an assembly plate 27. A limiting block 25 corresponding to the buffer device 9 is fixed on the assembly plate 27. An elastic second buffer pad 26 is fixed on the inner side of the limiting block 25 to play a protective role. The assembly plate 27 is detachably fixed on the main beam 28 by bolts, which is convenient for installation and disassembly.

[0026] During use, the goods are hooked on the hook assembly of the lifting device 7. The lifting device 7 is powered on to work and lift the goods to an appropriate height. The trolley 6 can drive the lifting device 7 and the goods to move left and right along the trolley track 5. The protection wheel 16 moves together with the trolley 6. The protection wheel 16 moves along the lower track 10, which can prevent the trolley 6 from tipping over and derailing. The trolley running mechanism can drive the trolley 6 and other components to move longitudinally along the crane track 1 to transport the goods to the destination. During the lifting process, when the two trolleys 6 collide due to equipment failure or improper operation, the first buffer pad 14, the second buffer pad 26, and the spring 12 all play a buffer and protection role, having a good anti-collision function.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] The above embodiments are illustrative of the present invention, not limiting of the present invention. Any simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A new type of double trolley bridge crane, including two main beams, the ends of the main beams are fixed with end beams, the end beams are equipped with a trolley travel mechanism, the top of the main beams is fixed with a trolley track, the top of the main beams is provided with two trolleys that can run along the trolley track, and the trolleys are fixed with lifting devices, characterized in that: The trolleys are all equipped with symmetrical anti-rollover devices, which include protection wheels arranged at the bottom of the main beam, a lower track corresponding to the protection wheel is fixed at the bottom of the main beam, the middle part of the protection wheel is rotatably connected with a rotating shaft, both ends of the rotating shaft extend to the outside of the protection wheel and are fixed with lower assembly rods, an upper assembly rod is detachably fixed to the side of the trolley, a connecting rod is fixed between the upper assembly rod and the lower assembly rod, and there is a gap between the connecting rod and the side of the main beam; a mounting frame is detachably fixed to the outside of the lower assembly rod, and buffer devices are fixed to the outside of the mounting frame and the end of the trolley, and limit devices corresponding to the buffer devices are detachably fixed to the ends of the trolley track and the lower track.

2. The novel double-trolley bridge crane according to claim 1 is characterized in that: An assembly shaft is fixed to the end of the lower assembly rod, an inverted U-shaped assembly groove is provided at the bottom of the connecting rod, the assembly shaft is arranged in the assembly groove, and the outer end of the assembly shaft extends out of the assembly groove and is threadedly connected with a locking nut.

3. The novel double-trolley bridge crane according to claim 1 is characterized in that: Assembly blocks are fixed on both sides of the upper assembly rod, and the assembly blocks are detachably fixed on the sides of the trolley by bolts.

4. The novel double-trolley bridge crane according to claim 1 is characterized in that: Mounting plates are fixed at both ends of the mounting frame, and the mounting plates are detachably fixed on the lower assembly rod by screws.

5. The novel double-trolley bridge crane according to claim 1 is characterized in that: The buffer device includes a buffer plate and a fixed plate, a plurality of springs are fixed between the buffer plate and the fixed plate, a first elastic buffer pad is fixed on the outside of the buffer plate, and the fixed plate is detachably fixed to the outside of the mounting frame or the end of the trolley by screws.

6. The novel double-trolley bridge crane according to claim 1 is characterized in that: The limiting device comprises an assembly plate, on which a limiting block corresponding to the buffer device is fixed, on the inner side of the limiting block a second elastic buffer pad is fixed, and the assembly plate is detachably fixed to the main beam by bolts.

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