Novel portal crane

Abstract

The utility model relates to the technical field of cranes, in particular to a novel portal crane which comprises two inverted-V-shaped supporting legs, a portal frame is fixedly installed at the tops of the supporting legs, a moving mechanism is installed on the outer side of a lead screw in a threaded mode and comprises a threading trolley, a lower grabbing plate is fixedly installed at the bottom of the threading trolley, and the upper grabbing plate is fixedly installed on the lower grabbing plate. Two fixing plates are fixedly mounted in the lower grabbing plate through bolts, and pulley blocks are rotationally mounted in the two fixing plates. The driving motor is started to drive the two gears to be meshed with each other and drive the two rope winding drums to synchronously and reversely rotate, so that the length of a steel cable outside the rope winding drums is reduced, the pulley hooks are driven to move upwards, the two pulley hooks can move up and down at the same time, the synchronism of the two pulley hooks is improved, and the service life of the pulley hooks is prolonged. And meanwhile, the bearing capacity of each steel cable can be reduced through the movable pulley structure, and the lifting capacity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a novel gantry crane. Background Art

[0002] Gantry cranes, also known as gantry cranes, are large-scale lifting equipment widely used in industrial production. Their metal structure is a gate-shaped frame with two legs mounted underneath, allowing them to travel directly on ground tracks. The main beam, the load-bearing mechanism, is typically made of steel and possesses sufficient strength and rigidity. They are typically used in outdoor cargo yards, material yards, and bulk cargo handling facilities. They offer high site utilization, a wide operating range, and adaptability to a variety of working environments. Their stable structure, strong lifting capacity, wide adaptability, ease of operation, and high safety make them a crucial lifting tool in industrial production.

[0003] The Chinese patent, publication number CN216971799U, discloses a new double-girder gantry crane, comprising a lifting vehicle seat, a fixed top beam and a lifting plate. This crane has additional stabilizing and adjusting mechanisms, which facilitate positioning before lifting, provide greater stability during lifting, and can lift cargo of different widths.

[0004] The above-mentioned and similar existing technologies can, to a certain extent, achieve lifting of cargoes of different widths. However, the hooks of the existing technologies are supported by guide columns and drive screws, or by a single steel cable. When lifting heavy objects, these supporting components have a large bearing capacity and are prone to deformation or even breaking, posing a safety hazard.

[0005] Therefore, the utility model provides a gantry crane capable of reducing the stress bearing of the steel cable. Utility Model Content

[0006] A new type of gantry crane is designed to address the problems in the existing technology where the supporting components have a large bearing capacity and are prone to deformation or even breakage.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a new type of gantry crane, comprising two inverted V-shaped legs, a gantry is fixedly installed on the top of the legs, a double-headed motor is installed through the inside of the gantry, two output ends of the double-headed motor are fixedly installed with screws, the outer side of the screw is threadedly installed with a moving mechanism, the moving mechanism includes a threading machine, the bottom of the threading machine is fixedly installed with a lower grab plate, the interior of the lower grab plate is fixed with two fixed plates by bolts, the interior of the two fixed plates is installed with a pulley group by rotation, the pulley group includes two pulleys, and the outer side of the pulley group is slidably provided with a steel cable.

[0008] Furthermore, two sliding holes are symmetrically provided inside the gantry, and two vertical holes are symmetrically provided at the bottom of the gantry, and the vertical holes are communicated with the sliding holes.

[0009] Furthermore, the double-headed motor is arranged through the middle position of the gantry, and the end of the screw rod away from the double-headed motor is installed on the inner wall of one side of the sliding hole through a bearing.

[0010] Furthermore, the threading machine is located inside the sliding hole, and the roller of the threading machine rolls along the bottom wall of the sliding hole, and the lower grab plate passes through the inner side of the vertical hole.

[0011] Furthermore, a supplementary block is fixedly installed on the inner side of the supporting leg.

[0012] Furthermore, a storage box is fixedly installed in the middle position of the bottom of the gantry, a protective shell is fixedly installed on one side of the storage box, two rope-collecting drums are rotatably installed inside the storage box through bearings and rotating rods, gears are fixedly installed on the outside of the rotating rod, the two gears are located on the inner side of the protective shell, and the two gears are engaged with each other, a drive motor is fixedly installed on the side of the protective shell away from the storage box, and the output end of the drive motor is fixedly connected to one of the rotating rods.

[0013] Furthermore, one end of the steel cable is fixedly installed on the surface of the rope drum, and the other end of the steel cable is fixedly installed on one side of the supplementary block, and the steel cable is wrapped around the outside of the pulley group, and part of the steel cable is U-shaped and passes between the two pulleys, and the U-shaped part of the steel cable is slidably provided with a pulley hook.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model describes a new type of gantry crane, which starts a driving motor to drive two gears to engage with each other, and drives two rope drums to rotate in opposite directions synchronously, so as to reduce the length of the steel cable outside the rope drum, thereby driving the pulley hook to move upward, so that the two pulley hooks can move up and down at the same time, thereby improving the synchronization of the two pulley hooks, and further improving the stability of the cargo lifting process. At the same time, the movable pulley structure can reduce the bearing capacity of each steel cable, thereby improving the lifting capacity.

[0016] (2) The new type of gantry crane described in the utility model adopts the rolling between the threading machine and the sliding hole, so that when the double-headed motor and the screw rod perform threading work, the rolling friction is used to reduce the load of the double-headed motor and the screw rod, and it is also convenient to lift goods of different widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the gantry crane body of the present utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the gantry of the present utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the storage box of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the moving mechanism of the utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the rope-collecting drum of the present utility model.

[0023] In the figure: 1. Support leg; 2. Gantry; 3. Sliding hole; 4. Vertical hole; 5. Double-head motor; 6. Screw; 7. Moving mechanism; 71. Threading machine; 72. Lower grab plate; 73. Fixing plate; 74. Pulley block; 8. Supplementary block; 9. Storage box; 10. Protective shell; 11. Rope drum; 12. Gear; 13. Drive motor; 14. Steel cable; 15. Pulley hook. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] Example:

[0026] like Figure 1-Figure 5 As shown, a new type of gantry crane described in the utility model includes two inverted V-shaped legs 1, a gantry 2 is fixedly installed on the top of the legs 1, two sliding holes 3 are symmetrically opened inside the gantry 2, two vertical holes 4 are symmetrically opened at the bottom of the gantry 2, and the vertical holes 4 are communicated with the sliding holes 3, a double-headed motor 5 is installed inside the gantry 2, and a screw rod 6 is fixedly installed at the two output ends of the double-headed motor 5, the double-headed motor 5 is arranged in the middle position of the gantry 2, and the end of the screw rod 6 away from the double-headed motor 5 is installed on the inner wall of one side of the sliding hole 3 through a bearing.

[0027] Specifically, the support leg 1 can provide stable support for the gantry 2, the gantry 2 can provide a through-opening space for the sliding hole 3 and the vertical hole 4, the sliding hole 3 can provide a rolling space for the thread car 71, and the vertical hole 4 can utilize the resistance effect with the lower grab plate 72 to enable the thread car 71 to normally engage with the screw rod 6, and the gantry 2 can provide placement support for the double-headed motor 5.

[0028] In this embodiment, the outer thread of the screw rod 6 is installed with a moving mechanism 7, and the moving mechanism 7 includes a threading machine 71. The bottom of the threading machine 71 is fixedly installed with a lower grab plate 72. The interior of the lower grab plate 72 is fixed with two fixed plates 73 by bolts. The interior of the two fixed plates 73 is installed with a pulley group 74 by rotation. The pulley group 74 includes two pulleys. The outer side of the pulley group 74 is slidingly provided with a steel cable 14. The threading machine 71 is located on the inner side of the sliding hole 3, and the roller of the threading machine 71 rolls along the bottom wall of the sliding hole 3. The lower grab plate 72 passes through the inner side of the vertical hole 4.

[0029] Specifically, the threading machine 71 can provide a space for the thread to pass through the screw rod 6, and the threading machine 71 can provide a stable support for the lower grab plate 72. The lower grab plate 72 can fix and support the fixing plate 73 through bolts, and the fixing plate 73 provides rotational support for the pulley group 74. When the screw rod 6 drives the threading machine 71 to move left and right, since the length of the steel cable 14 outside the rope drum 11 is not changed, the height of the pulley hook 15 will not change, and it can only drive the pulley hook 15 to move left and right.

[0030] In this embodiment, a storage box 9 is fixedly installed in the middle position of the bottom of the gantry 2, and a protective shell 10 is fixedly installed on one side of the storage box 9. Two rope drums 11 are rotatably installed inside the storage box 9 through bearings and rotating rods. A gear 12 is fixedly installed on the outside of the rotating rod. The two gears 12 are located on the inner side of the protective shell 10, and the two gears 12 are meshed with each other. A drive motor 13 is fixedly installed on the side of the protective shell 10 away from the storage box 9, and the output end of the drive motor 13 is fixedly connected to one of the rotating rods. A supplementary block 8 is fixedly installed on the inner side of the support leg 1, one end of the steel cable 14 is fixedly installed on the surface of the rope drum 11, and the other end of the steel cable 14 is fixedly installed on one side of the supplementary block 8, and the steel cable 14 is wound around the outside of the pulley group 74, and part of the steel cable 14 is U-shaped and passes between the two pulleys. The U-shaped part of the steel cable 14 is slidingly provided with a pulley hook 15.

[0031] Specifically, the storage box 9 can provide rotational support for the rope drum 11 through bearings and rotating rods, the gear 12 can provide the two rope drums 11 with a movement trend of reverse rotation, and the drive motor 13 provides the two rope drums 11 with a driving force for reverse rotation through the gear 12. When the drive motor 13 drives the two rope drums 11 to rotate in the opposite direction, the rope drum 11 can drive the steel cable 14 to wind around, so that the length of the steel cable 14 outside the rope drum 11 is shortened, and the pulley hook 15 can be lifted. At the same time, due to the synchronization action of the gear 12, the two pulley hooks 15 can be lifted synchronously.

[0032] Working principle: When in use, the staff first starts the double-headed motor 5 to drive the screw rod 6 to rotate, so that the screw rod 6 uses the thread action to drive the thread car 71 to roll along the inner side of the slide hole 3, and the thread car 71 drives the fixed plate 73 and the pulley group 74 to move left and right through the lower grab plate 72, so that the pulley of the pulley group 74 rolls by friction with the steel cable 14, and at the same time, the pulley of the pulley hook 15 also rotates, thereby driving the pulley hook 15 to move left and right. Then the staff hooks the pulley hook 15 on the cargo, starts the drive motor 13 to drive the gear 12 to rotate, so that the two gears 12 use the meshing action of each other to drive the two rope drums 11 to rotate in the opposite direction, and the rope drum 11 drives one end of the steel cable 14 to reel in, thereby reducing the length of the steel cable 14 outside the rope drum 11, so that the steel cable 14 drives the pulley hook 15 to move upward, thereby driving the cargo to be lifted.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel gantry crane, comprising two inverted V-shaped legs (1), with a gantry (2) fixedly mounted on the top of the legs (1), characterized in that: A double-headed motor (5) is installed inside the gantry (2), and two output ends of the double-headed motor (5) are fixedly installed with screw rods (6). The outer thread of the screw rod (6) is threadedly installed with a moving mechanism (7), and the moving mechanism (7) includes a thread car (71). The bottom of the thread car (71) is fixedly installed with a lower grab plate (72), and two fixed plates (73) are fixedly installed inside the lower grab plate (72) by bolts. A pulley group (74) is installed inside the two fixed plates (73) by rotation, and the pulley group (74) includes two pulleys. A steel cable (14) is slidingly provided on the outer side of the pulley group (74).

2. A novel gantry crane according to claim 1, characterized in that: Two sliding holes (3) are symmetrically provided inside the gantry (2), and two vertical holes (4) are symmetrically provided at the bottom of the gantry (2), and the vertical holes (4) are communicated with the sliding holes (3).

3. A novel gantry crane according to claim 2, characterized in that: The double-headed motor (5) is arranged through the middle position of the gantry (2), and the end of the screw rod (6) away from the double-headed motor (5) is installed on the inner wall of one side of the sliding hole (3) through a bearing.

4. A novel gantry crane according to claim 2, characterized in that: The threading machine (71) is located inside the sliding hole (3), and the roller of the threading machine (71) rolls along the bottom wall of the sliding hole (3), and the lower grab plate (72) passes through the inside of the vertical hole (4).

5. A novel gantry crane according to claim 1, characterized in that: A supplementary block (8) is fixedly mounted on the inner side of the supporting leg (1).

6. A novel gantry crane according to claim 2, characterized in that: A storage box (9) is fixedly installed at the middle position of the bottom of the gantry (2), a protective shell (10) is fixedly installed on one side of the storage box (9), two rope-collecting drums (11) are rotatably installed inside the storage box (9) through bearings and a rotating rod, a gear (12) is fixedly installed on the outside of the rotating rod, the two gears (12) are located on the inner side of the protective shell (10), and the two gears (12) are meshed with each other, a driving motor (13) is fixedly installed on the side of the protective shell (10) away from the storage box (9), and the output end of the driving motor (13) is fixedly connected to one of the rotating rods.

7. A novel gantry crane according to claim 6, characterized in that: One end of the steel cable (14) is fixedly mounted on the surface of the rope drum (11), and the other end of the steel cable (14) is fixedly mounted on one side of the supplementary block (8). The steel cable (14) is wound around the outside of the pulley block (74), and part of the steel cable (14) is U-shaped and passes between the two pulleys. The U-shaped part of the steel cable (14) is slidably provided with a pulley hook (15).

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