High-safety portal crane

Abstract

A high-safety portal crane comprises a main beam, a walking track is fixed to the bottom end of the main beam, an electric hoist is assembled on the walking track, lower end beams are arranged below the two ends of the main beam, first walking mechanisms are arranged at the two ends of each lower end beam, each lower end beam comprises a supporting beam, and a hinge seat is arranged at the top end of each supporting beam; supporting legs are arranged between the lower end beam and the main beam and comprise two symmetrically-arranged supporting cylinders, the bottom ends of the supporting cylinders are hinged to hinge seats at the top end of the lower end beam, the upper ends of the supporting cylinders are sleeved with supporting rods, and the top ends of the supporting rods are hinged to the bottom end of the main beam through hinge seats. The supporting rod and the supporting cylinder are provided with a plurality of fixing holes which are evenly formed at intervals, and the supporting rod is detachably fixed to the upper end of the supporting cylinder through a pin shaft. A telescopic supporting column is detachably arranged between the supporting cylinder and the lower end beam. The device is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and in particular relates to a high-safety gantry crane. Background Art

[0002] A crane refers to a multi-action lifting machine that can lift and carry heavy objects vertically and horizontally within a certain range. It is also called an overhead crane, an overhead crane, or a crane. Cranes are mainly divided into bridge cranes, gantry cranes, and tower cranes. Among them, a gantry crane is a bridge crane whose bridge is supported on a ground track by legs on both sides. It is structurally composed of a gantry, a trolley running mechanism, a lifting trolley, and an electrical part. A gantry crane is mainly used for outdoor loading and unloading operations. The existing gantry crane legs have only one support column. In order to adapt to different workplace requirements, the gantry crane legs are set to retractable legs through hydraulic cylinders, so that the height of the legs can be adjusted as needed. However, since gantry cranes are generally used outdoors, as the legs are raised, the center of gravity of the crane moves upward. Under the action of strong winds, the crane is prone to tipping over. Therefore, while the existing cranes pursue height increases, they become unstable due to the upward movement of the center of gravity of the crane. In addition, in the prior art, the height that can be lifted is limited by adjusting the length of the crane legs through the cylinder. Utility Model Content

[0003] In order to solve the technical problem that after the legs of the existing gantry crane are raised, the center of gravity of the crane is raised and the crane becomes unstable under the action of strong winds, the utility model provides a high-safety gantry crane, including a horizontally arranged main beam, the main beam is a box beam, and the main beam plays a supporting role, the bottom end of the main beam is fixed with a walking track arranged parallel to the main beam, and the walking track is equipped with an electric hoist for lifting heavy objects. A second traveling mechanism is provided at the upper end of the electric hoist, and the second traveling mechanism includes a support frame, the electric hoist is fixed at the lower end of the support frame, and the upper end of the support frame is rotatably equipped with a second traveling wheel, and a second traveling motor is fixed on the support frame, and a power output shaft of the second traveling motor is transmission-connected to the second traveling wheel. The electric hoist includes an electric hoist housing, a brake, a lifting motor, a reducer and a lifting drum, and the lifting drum is transmission-connected to the lifting motor through the reducer, the brake and the lifting motor. A hook is provided under the lifting drum, and the hook is connected to the lifting drum through a wire rope. The second traveling motor and the lifting motor are connected to a power supply and a controller through a cable, and the second traveling motor is started, and the second traveling motor drives the second traveling wheel to move along the traveling track under the main beam, so as to drive the electric hoist to move freely along the length direction of the main beam, and the lifting motor is started, and the lifting motor drives the lifting drum to rotate, and the lifting drum is wound with a wire rope and pulls the hook to rise and fall. Lower end beams are provided below both ends of the main beam. The lower end beams are vertically distributed in the main beam space, and both ends of the lower end beams are provided with first walking mechanisms. The lower end beams include several sections of supporting beams. When in use, an appropriate number of lower end beams are selected according to needs. Each section of the supporting beams is detachably fixedly connected through a flange, and a hinged seat is provided at the top of each section of the supporting beam. The lower end beam adopts a method of splicing multiple sections of supporting beams, which is convenient for adjusting the length of the lower end beam according to needs, so that when the center of gravity of the crane is raised, it becomes more stable under the action of strong winds. There are legs between the lower end beam and the main beam, and the legs play a supporting role. The legs include two symmetrically arranged support tubes, the bottom ends of the support tubes are hinged on the hinge seat at the top of the lower end beam, the upper ends of the support tubes are sleeved with support rods, the top ends of the support rods are hinged to the bottom of the main beam through the hinge seat, and a number of evenly spaced fixing holes are opened on the support rods and the support tubes, and the support rods are detachably fixed to the upper ends of the support tubes through pins. By adjusting the length of the support rods in the support tubes, the length of the legs can be adjusted, thereby adjusting the lifting range of the electric hoist. A retractable support column is detachably arranged between the support tube and the lower end beam, and the retractable support column includes a support tube, the bottom end of the support tube is hinged on the hinge seat at the top of the support beam, and the upper end of the support tube is sleeved with a support column, and a number of evenly spaced assembly holes are opened on the support column and the support tube, and the support column is detachably fixed to the support tube through pins. The setting of the retractable support column can support the legs and enhance stability.

[0004] Preferably, the first traveling mechanism comprises a first traveling motor and a first traveling wheel, the first traveling wheel is rotatably mounted on the support beam, the first traveling motor is fixed on the support beam, and the first traveling motor is transmission-connected to the first traveling wheel.

[0005] Preferably, buffers for buffering are fixed to both ends of the lower end beam.

[0006] The above solution has the following advantages:

[0007] The lower end beam adopts the method of splicing and fixing multiple support beams. The length of the lower end beam can be adjusted according to the needs of the construction site. Therefore, when the crane's legs are raised and the center of gravity moves up, it can still remain stable, reducing the probability of tipping and improving safety. The legs are arranged in a detachable and fixed manner with support tubes and support rods, which can increase the lifting range of the gantry crane and meet customer needs. The setting of retractable support columns can support and fix the legs, making the legs more stable and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0009] Figure 2 This is a schematic diagram of the utility model showing the outriggers in a state where they are not raised;

[0010] Figure 3 This is a schematic diagram of the state after the outriggers of the utility model are raised;

[0011] Figure 4 for Figure 2 Enlarged view of part A.

[0012] Figure numerals: 1. main beam; 2. electric hoist; 3. lower end beam; 4. first walking mechanism; 5. outrigger; 6. retractable support column; 11. walking track; 12. cable; 21. second walking mechanism; 22. hook; 23. wire rope; 24. support frame; 25. second walking wheel; 26. second walking motor; 31. support beam; 32. articulated seat; 33. buffer; 41. first walking wheel; 42. first walking motor; 51. support tube; 52. support rod; 53. fixing hole; 54. pin shaft; 61. support tube; 62. support column. DETAILED DESCRIPTION

[0013] like Figure 1-4As shown, a high-safety gantry crane includes a horizontally arranged main beam 1. The main beam 1 is a box beam and plays a supporting role. A travel track 11 arranged parallel to the main beam 1 is fixed to the bottom end of the main beam 1, and an electric hoist 2 for lifting heavy objects is installed on the travel track 11. A second travel mechanism 21 is provided at the upper end of the electric hoist 2. The second travel mechanism 21 includes a support frame 24. The electric hoist 2 is fixed to the lower end of the support frame 24. The upper end of the support frame 24 is rotatably equipped with a second travel wheel 25. A second travel motor 26 is fixed to the support frame 24. The power output shaft of the second travel motor 26 is transmission-connected to the second travel wheel 25. The electric hoist 2 includes an electric hoist housing, a brake, a lifting motor, a reducer and a lifting drum. The lifting drum is transmission-connected via the reducer, the brake and the lifting motor. Then, a hook 22 is provided under the lifting drum, and the hook 22 is connected to the lifting drum through a wire rope 23. The second travel motor 26 and the lifting motor are connected to a power supply and a controller through a cable. The second travel motor 26 is started, and the second travel motor 26 drives the second travel wheel 25 to move along the travel track 11 under the main beam 1, so that the electric hoist 2 can be driven to move freely along the length direction of the main beam 1. The lifting motor is started, and the lifting motor drives the lifting drum to rotate. The lifting drum is wound with the wire rope 23 and pulls the hook 22 to rise and fall. A lower end beam 3 is provided below both ends of the main beam 1. The lower end beam 3 is vertically distributed in space with the main beam 1, and a first walking mechanism 4 is provided at both ends of the lower end beam 3. The lower end beam 3 includes a plurality of support beams 31. When in use, an appropriate number of lower end beams 3 are selected according to needs. Each section of the support beam 31 is detachably fixedly connected through a flange, and a hinge seat 32 is provided at the top of each section of the support beam 31. The lower end beam 3 adopts a splicing method of multiple sections of support beams 31, which is convenient for adjusting the length of the lower end beam 3 according to needs, so that when the center of gravity of the crane is raised, it becomes more stable under the action of strong winds. A support leg 5 is provided between the lower end beam 3 and the main beam 1. The support leg 5 plays a supporting role. The support leg 5 includes two symmetrically arranged support tubes 51. The bottom end of the support tube 51 is hinged on the hinge seat 32 at the top end of the lower end beam 3. The upper end of the support tube 51 is sleeved with a support rod 52. The top end of the support rod 52 is hinged to the bottom end of the main beam 1 through the hinge seat 32. A number of evenly spaced fixing holes 53 are provided on the support rod 52 and the support tube 51. The support rod 52 is detachably fixed to the upper end of the support tube 51 through a pin shaft 54. By adjusting the length of the support rod 52 in the support tube 51, the length of the support leg 5 can be adjusted, thereby adjusting the lifting range of the electric hoist 2.A retractable support column 6 is detachably provided between the support tube 51 and the lower end beam 3. The retractable support column 6 includes a support tube 61. The bottom end of the support tube 61 is hinged on the hinge seat 32 at the top end of the support beam 31. The upper end of the support tube 61 is sleeved with a support column 62. A number of evenly spaced assembly holes are provided on the support column 62 and the support tube 61. The support column 62 is detachably fixed to the support tube 61 by a pin shaft. The setting of the retractable support column 6 can support the support leg 5 and enhance stability.

[0014] Preferably, the first walking mechanism 4 includes a first walking motor 42 and a first walking wheel 41 . The first walking wheel 41 is rotatably mounted on the support beam 31 . The first walking motor 42 is fixed on the support beam 31 , and the first walking motor 42 is transmission-connected to the first walking wheel 41 .

[0015] Preferably, buffers 33 for buffering are fixed to both ends of the lower end beam 3 .

[0016] Usage process:

[0017] When the utility model is in use, according to the use requirements of the range of the electric hoist 2, the construction site needs to raise the support legs 5. When installing the gantry crane, select an appropriate number of support beams 31, fix each section of the support beams 31 through a flange, and adjust the two support legs 5 to a vertical state, set a retractable support column 6 between the support tube 51 and the lower end beam 3, and after adjusting the length of the retractable support column 6, hinge the bottom end of the support tube 61 on the hinge seat 32 at the top of the support beam 31, and hinge the top end of the support column 62 on the support tube 51, and then adjust the position of the support rod 52 in the support tube 51, fix the support rod 52 on the support tube 51 through the pin 54, and then assemble the main beam 1 and the electric hoist 2 respectively.

[0018] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "top", "bottom", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 understood as a limitation on the present invention.

[0019] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A high-safety gantry crane, comprising a horizontally arranged main beam, a travel track arranged parallel to the main beam is fixed at the bottom end of the main beam, and an electric hoist for lifting heavy objects is installed on the travel track, a lower end beam is arranged below both ends of the main beam, the lower end beam is vertically distributed with the main beam space, and a first travel mechanism is arranged at both ends of the lower end beam, characterized in that: The lower end beam includes several sections of support beams, each section of the support beams is detachably fixedly connected by a flange, and a hinge seat is provided at the top of each section of the support beam, and a support leg is provided between the lower end beam and the main beam, and the support leg includes two symmetrically arranged support tubes, the bottom ends of the support tubes are hinged to the hinge seat at the top end of the lower end beam, and the upper ends of the support tubes are sleeved with support rods, and the top ends of the support rods are hinged to the bottom end of the main beam through the hinge seat, and several evenly spaced fixing holes are provided on the support rods and the support tubes, and the support rods are detachably fixed to the upper end of the support tubes through pins; a retractable support column is detachably arranged between the support tube and the lower end beam.

2. A high-safety gantry crane according to claim 1, characterized in that: The retractable support column includes a support tube, the bottom end of the support tube is hinged on the hinge seat at the top end of the support beam, the upper end of the support tube is sleeved with a support column, and the support column and the support tube are provided with a plurality of evenly spaced assembly holes, and the support column is detachably fixed to the support tube by a pin shaft.

3. A high-safety gantry crane according to claim 1, characterized in that: A second traveling mechanism is provided at the upper end of the electric hoist, and the second traveling mechanism includes a supporting frame. The electric hoist is fixed at the lower end of the supporting frame. The upper end of the supporting frame is rotatably equipped with a second traveling wheel. A second traveling motor is fixed on the supporting frame, and a power output shaft of the second traveling motor is drivingly connected to the second traveling wheel.

4. A high-safety gantry crane according to claim 1, characterized in that: The electric hoist includes an electric hoist housing, a brake, a lifting motor, a reducer and a lifting drum. The lifting drum is connected to the reducer, the brake and the lifting motor through a transmission. A hook is provided under the lifting drum, and the hook is connected to the lifting drum through a wire rope.

5. A high-safety gantry crane according to claim 1, characterized in that: The first walking mechanism comprises a first walking motor and a first walking wheel. The first walking wheel is rotatably mounted on the support beam. The first walking motor is fixed on the support beam, and the first walking motor is drivingly connected to the first walking wheel.

6. A high-safety gantry crane according to claim 1, characterized in that: Buffers that play a buffering role are fixed at both ends of the lower end beam.

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