Mobile trolley and double-beam bridge crane with same

Abstract

The utility model relates to a moving trolley and a double-beam bridge crane with the same, which comprises a frame and wheels arranged on two sides of the frame, the frame is positioned at the upper end of a main beam of the double-beam bridge crane, and the wheels are placed on a trolley track at the upper end of the main beam. A lower bottom plate is arranged at the lower end of the frame in a suspended mode through a supporting frame, a pressing wheel is arranged on the lower bottom plate, and the pressing wheel is in contact fit with the lower end face of the main beam. The main beam is clamped between the wheels of the moving trolley and the pressing wheels on the lower bottom plate, the stability of the moving trolley can be effectively guaranteed, and the derailing risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge-type lifting equipment, and in particular relates to a mobile trolley and a double-beam bridge crane with the mobile trolley. Background Art

[0002] A crane is a lifting machine that can lift heavy objects vertically and move them horizontally within a certain range. With the rapid development of modern industry, cranes have become one of the indispensable equipment in various occasions such as docks, factories, warehouses, etc. A bridge crane is a lifting equipment that is horizontally mounted above workshops, warehouses and material yards to lift materials, and a double-beam bridge crane has a better load-bearing capacity and can lift and move heavier goods. Therefore, double-beam bridge cranes are used more and more widely, and are widely used in indoor and outdoor industrial and mining enterprises, steel and chemical industries, railway transportation, ports and terminals, logistics turnover and other departments and places.

[0003] The double-beam bridge crane includes two parallel main beams, on which tracks are arranged, and the wheels of the mobile trolley are placed on the tracks, so that the mobile trolley moves along the tracks on the two main beams, and the electric hoist is fastened to the mobile trolley. When the electric hoist of the existing double-beam bridge crane lifts the heavy object, due to the center of gravity problem of the heavy object, the heavy object often swings, shakes, rotates and other unstable phenomena during the lifting process. Under the pulling action of the heavy object, it is easy to cause the mobile trolley to swing and shake, resulting in unstable operation of the mobile trolley. In serious cases, the wheels of the mobile trolley will be separated from the track, resulting in the risk of derailment. Utility Model Content

[0004] In summary, in order to overcome the deficiencies of the prior art, the utility model provides a mobile trolley, the lower end of which is connected to a lower bottom plate via a support frame, a pressure wheel is arranged on the lower bottom plate, the pressure wheel contacts the lower end surface of the main beam of the double-beam bridge crane, and the wheels of the mobile trolley and the pressure wheel on the lower bottom plate sandwich the main beam in the middle, which can effectively ensure the stability of the mobile trolley and reduce the risk of derailment. At the same time, the utility model also provides a double-beam bridge crane with the mobile trolley.

[0005] In order to solve the above technical problems, the technical solution of the mobile vehicle provided by the utility model is implemented as follows:

[0006] A mobile trolley includes a frame and wheels arranged on both sides of the frame, wherein the frame is located at the upper end of the main beam of a double-beam bridge crane, and the wheels are placed on the trolley track at the upper end of the main beam. The invention is characterized in that a lower bottom plate is suspended on the lower end surface of the frame through a support frame, a pressure wheel is arranged on the lower bottom plate, and the pressure wheel is in contact with and cooperates with the lower end surface of the main beam.

[0007] Furthermore, it also includes a power device, which is arranged on a frame or a support frame. The power device drives the wheels to rotate, so that the mobile trolley moves along the trolley track at the upper end of the main beam.

[0008] Furthermore, a through hole is provided in the middle of the lower base plate, and the through hole is used for passing the steel wire rope of the electric hoist.

[0009] Furthermore, the four corners of the lower base plate are provided with mounting grooves for mounting a pressure wheel, the mounting grooves are rectangular holes, the pressure wheel is arranged in the mounting grooves, and symmetrically arranged mounting threaded holes are provided on both sides of the mounting grooves.

[0010] Furthermore, the pressure wheel includes a wheel axle, a bearing and a wheel. Both ends of the wheel axle have two corresponding upper and lower planes, and have a pressure wheel mounting hole connecting the two planes. The wheel axle is connected to the lower base plate by bolts passing through the pressure wheel mounting hole and the mounting threaded hole. Bearing chambers are provided on both sides of the wheel, and bearings are installed in the two bearing chambers. The wheel is connected to the wheel axle for relative rotation through the bearing. A groove is provided on the wheel axle, and a retaining spring is provided in the groove. The retaining spring is used to axially fix the bearing.

[0011] Furthermore, the support frame includes a column, and flanges are welded and fixed at both upper and lower ends of the column. The flange at the upper end of the column is fastened to the frame by bolts, and the flange at the lower end of the column is fastened to the lower base plate by bolts.

[0012] Furthermore, the frame includes a trolley frame, a trolley cross beam and a trolley longitudinal shoulder. There are two trolley longitudinal shoulders. Both ends of the two trolley longitudinal shoulders are connected to the trolley frame. A trolley cross beam is provided on the trolley longitudinal shoulder. The trolley cross beam is arranged at the center position of the trolley longitudinal shoulder. A lifting ear is also provided at the center of gravity of the trolley cross beam. The lifting ear is used to install an electric hoist.

[0013] The technical solution of the double-beam bridge crane provided by the utility model is achieved as follows: a double-beam bridge crane comprises two main beams, two end beams fixed at the two ends of the two main beams, a trolley track arranged at the upper ends of the two main beams, a trolley traveling device, a traveling trolley and an electric hoist fastened to the traveling trolley, the main beams and the end beams constitute a traveling trolley frame, the trolley traveling device drives the trolley frame to travel, the traveling trolley moves along the trolley track, wherein the traveling trolley is the above-mentioned mobile trolley, the electric hoist is relatively fixedly connected to the frame or support frame of the mobile trolley, and the hook and lifting rigging of the electric hoist pass through the through holes on the lower bottom plate.

[0014] The beneficial effects of the utility model are:

[0015] The lower end of the frame of the mobile trolley of the utility model is suspended with a lower base plate, and the lower base plate is provided with a pressure wheel in contact with the lower end surface of the main beam. The wheels of the mobile trolley and the pressure wheel on the lower base plate clamp the main beam in the middle, which can effectively ensure the stability of the mobile trolley and reduce the risk of derailment. It has a simple structure, is easy to use, and is ingeniously conceived. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the mobile vehicle of the utility model;

[0017] Figure 2 It is a structural schematic diagram of a double-beam bridge crane of the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1As shown, a mobile trolley includes a frame 2 and wheels 3 arranged on both sides of the frame 2, the frame 2 is located at the upper end of the main beam 1 of the double-beam bridge crane, the wheels 3 are placed on the trolley track 4 at the upper end of the main beam 1, the outer circumference of the wheel 3 is provided with grooves arranged along the circumference thereof, and the upper part of the trolley track 4 at the upper end of the main beam 1 is located in the groove. A power device is provided on the frame 2 or the support frame 5, and the power device drives the wheel 3 to rotate, so that the mobile trolley moves along the trolley track 4 at the upper end of the main beam 1. In this embodiment, the power device adopts a motor, a reducer and a gear transmission. The main shaft of the motor is connected to the input shaft of the reducer, and a driving gear is provided on the output shaft of the reducer. A driven gear is provided on the main shaft of the wheel 3, and the driving gear and the driven gear are meshed with each other. The lower end surface of the frame 2 is suspended with a lower base plate 6 through the support frame 5. The support frame 5 is four columns arranged in the gap between the two main beams 1. Flanges are welded and fixed at the upper and lower ends of the columns. The flange at the upper end of the column is fastened to the frame by bolts, and the flange at the lower end of the column is fastened to the lower base plate by bolts. The upper end of the column is tightly connected to the frame 2, and the lower end of the column is tightly connected to the lower bottom plate 6. A through hole 7 is provided in the middle of the lower bottom plate 6, and the through hole 7 is used to pass the lifting rigging 10 of the electric hoist 11. The four corners of the lower bottom plate 6 are provided with pressure wheels 8, and the pressure wheels 8 are in contact with the lower end surface of the main beam 1. The four corners of the lower bottom plate 6 are provided with mounting grooves for mounting the pressure wheels 8. The mounting grooves are rectangular holes. The pressure wheels 8 are arranged in the mounting grooves, and symmetrically arranged mounting threaded holes are provided on both sides of the mounting grooves. The pressure wheel 8 includes a wheel axle, a bearing and a wheel. Both ends of the wheel axle have two corresponding upper and lower planes, and a pressure wheel mounting hole connecting the two planes. The wheel axle is connected to the lower bottom plate by bolts passing through the pressure wheel mounting hole and the mounting threaded hole. Both sides of the wheel are provided with bearing chambers, and bearings are installed in the two bearing chambers. The wheel is connected to the wheel axle for relative rotation through the bearings. A slot is provided on the wheel axle, and a retaining spring is provided in the slot. The retaining spring is used to axially fix the bearing. The frame 2 includes a trolley frame, a trolley cross beam 12 and a trolley longitudinal shoulder 13. There are two trolley longitudinal shoulders 13. Both ends of the two trolley longitudinal shoulders 13 are connected to the trolley frame. The trolley longitudinal shoulder 13 is provided with a trolley cross beam 12. The trolley cross beam 12 is provided at the center of the trolley longitudinal shoulder 13. A lifting lug is also provided at the center of gravity of the trolley cross beam 12. The lifting lug is used to install the electric hoist 11.

[0020] like Figure 2As shown, a double-beam bridge crane comprises two main beams 1, two end beams fixed at both ends of the two main beams 1, a trolley track 4 arranged at the upper ends of the two main beams 1, a trolley travel device, a trolley and an electric hoist 11 fastened to the trolley, the main beams 1 and the end beams constitute a trolley frame 2, the trolley travel device drives the trolley frame 2 to travel, the trolley moves along the trolley track 4, wherein the trolley is the above-mentioned mobile trolley, the electric hoist 11 is relatively fixedly connected to the frame 2 or the support frame 5 of the mobile trolley, and the hook 9 and the lifting rigging 10 of the electric hoist 11 pass through the through hole 7 on the lower bottom plate 6. The electric hoist 11 is fastened to the frame 2 of the mobile trolley, and the hook 9 and the lifting rigging 10 of the electric hoist 11 pass through the through hole 7 on the lower bottom plate 6 and are suspended in the air.

[0021] This embodiment takes a bridge crane arranged at the upper end of a workshop as an example to specifically illustrate the utility model. When in use, when the workshop needs to move heavy objects, the trolley traveling device is started, and the trolley traveling device drives the trolley frame 2 to move along the length direction of the workshop, and the power device of the mobile trolley is started. The power device drives the mobile trolley to move along the trolley track 4 at the upper end of the main beam 1, so that the mobile trolley moves along the width direction of the workshop, and the hook 9 of the electric hoist is moved above the heavy object, and the electric hoist is started to move the hook 9 downward. After that, the operator hooks the hook 9 to the heavy object and starts the electric hoist again to lift the heavy object upward. The heavy object is lifted up. During the lifting process, when the heavy object swings or shakes, making the mobile trolley unstable and unevenly stressed, the wheel 3 on the side of the mobile frame 2 with greater stress tends to press down the trolley track 4, and the wheel 3 on the side with less stress tends to tilt up and break away from the trolley track 4. At this time, the pressure wheel 8 on the side with less stress will also tend to tilt up, but the pressure wheel 8 is located below the main beam 1 and contacts the lower end surface of the main beam 1. The pressure wheel 8 cannot tilt up due to the obstruction of the main beam 1, so that the wheel 3 on the side with less stress cannot be separated from the trolley track 4, thereby effectively avoiding the risk of derailment and maintaining the stability of the mobile trolley. After the electric hoist lifts the heavy object, the trolley travel device and the power device of the mobile trolley are moved again. After the heavy object is moved to the destination, the electric hoist is restarted to lower the heavy object. After the heavy object falls to the destination, the hook 9 of the electric hoist is raised again, and the movement of the heavy object in the workshop is completed.

[0022] It should be noted that the above-described embodiments are illustrative of the technical solution of the utility model rather than limiting. Equivalent substitutions made by ordinary technicians in the relevant technical field or other modifications made according to the prior art should be included in the scope of rights required by the utility model as long as they do not exceed the idea and scope of the technical solution of the utility model.

Claims

1. A mobile trolley, comprising a frame and wheels arranged on both sides of the frame, wherein the frame is located at the upper end of the main beam of a double-beam bridge crane, and the wheels are placed on the trolley track at the upper end of the main beam, characterized in that: The lower end surface of the frame is provided with a lower bottom plate suspended by a support frame, and a pressure wheel is provided on the lower bottom plate, and the pressure wheel is in contact with and matched with the lower end surface of the main beam.

2. A mobile vehicle according to claim 1, characterized in that: It also includes a power device, which is arranged on a frame or a support frame. The power device drives the wheels to rotate, so that the mobile trolley moves along the trolley track at the upper end of the main beam.

3. A mobile vehicle according to claim 1, characterized in that: A through hole is arranged in the middle of the lower bottom plate, and the through hole is used for passing the steel wire rope of the electric hoist.

4. A mobile vehicle according to claim 1, characterized in that: The four corners of the lower base plate are all provided with mounting grooves for mounting the pressure wheel. The mounting grooves are rectangular holes. The pressure wheel is arranged in the mounting grooves. Both sides of the mounting grooves are provided with symmetrically arranged mounting threaded holes.

5. A mobile vehicle according to claim 4, characterized in that: The pressure wheel includes a wheel axle, a bearing and a wheel. Both ends of the wheel axle have two corresponding upper and lower planes, and a pressure wheel mounting hole connecting the two planes. The wheel axle is connected to the lower base plate by bolts passing through the pressure wheel mounting hole and the mounting threaded hole. Bearing chambers are provided on both sides of the wheel. Bearings are installed in the two bearing chambers. The wheel is connected to the wheel axle for relative rotation through the bearing. A groove is provided on the wheel axle, and a retaining spring is provided in the groove. The retaining spring is used to axially fix the bearing.

6. A mobile vehicle according to claim 1, characterized in that: The support frame comprises a column, and flanges are welded and fixed at both upper and lower ends of the column. The flange at the upper end of the column is fastened to the frame by bolts, and the flange at the lower end of the column is fastened to the lower base plate by bolts.

7. The mobile vehicle according to claim 1, characterized in that: The frame includes a trolley frame, a trolley crossbeam and a trolley longitudinal shoulder. There are two trolley longitudinal shoulders. Both ends of the two trolley longitudinal shoulders are connected to the trolley frame. A trolley crossbeam is provided on the trolley longitudinal shoulder. The trolley crossbeam is arranged at the center position of the trolley longitudinal shoulder. A lifting lug is also provided at the center of gravity of the trolley crossbeam. The lifting lug is used to install an electric hoist.

8. A double-beam bridge crane, comprising two main beams, two end beams fixed at both ends of the two main beams, a trolley track arranged at the upper ends of the two main beams, a trolley traveling device, a traveling trolley and an electric hoist fastened to the traveling trolley, wherein the main beams and the end beams constitute a traveling trolley frame, the trolley traveling device drives the trolley frame to travel, and the traveling trolley moves along the trolley track, characterized in that: The traveling trolley is a mobile trolley as described in any one of claims 1 to 7, the electric hoist is relatively fixedly connected to the frame or support frame of the mobile trolley, and the hook and lifting rigging of the electric hoist pass through the through holes on the lower bottom plate.

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