Movable portal crane

Abstract

The invention relates to the technical field of crane equipment, and provides a movable portal crane which comprises a portal support frame and a track, rails are laid and installed on the two sides of the bottom end of the gate-type supporting frame, braking mechanisms are arranged at the two ends of the bottom of the gate-type supporting frame, rolling wheels are movably installed at the bottom end of the gate-type supporting frame, and an electric hoist is movably installed at the top of the gate-type supporting frame. By arranging the lubricating mechanism, when a steel wire rope lifts a heavy object, through cooperation between a second gear and a forward and reverse rack, a fourth gear rotates forwards, the second rack is driven to move towards the middle at the same time, extrusion plates are made to get close, a piston is pushed to move towards one side through extrusion of a connecting rod, and lubricating oil is sprayed out from an oil outlet; when the steel wire rope moves upwards, the steel wire rope is fully contacted with the surface of the steel wire rope, so that lubrication is uniform, friction between the steel wire rope of the portal crane and parts such as a pulley and a winding drum is reduced, and the service life of the steel wire rope is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of crane equipment, in particular to a movable gantry crane. Background Art

[0002] A gantry crane, also known as a portal crane, is a variant of a bridge crane. Its bridge is supported by two legs on the ground track, forming a door-shaped frame. A gantry crane is a door-shaped lifting machine that performs cyclic and intermittent movements. It uses crane beams and crane ropes to lift, lower and move heavy objects. It is mainly used for outdoor cargo yards, storage yards and bulk cargo loading and unloading operations. Due to its high site utilization rate, wide operating range, wide adaptability and strong versatility, it is widely used in ports, docks, metallurgy, electric power, chemical industry and other industrial sites. The conventional existing technical solutions have the following defects: During operation, the wire rope is constantly rubbing against pulleys, drums and other components, and needs to be lubricated regularly. However, during use, workers often forget to lubricate the rope, which leads to increased wear on the surface of the wire rope. In addition, the bending part of the wire rope on the pulley or drum is prone to stress concentration, which accelerates wire breakage and damage. When a crane is used outdoors and encounters strong winds, it will slide with the wind, but it will not be able to stop automatically. If the brakes are not stopped in time, the crane may collide with surrounding buildings, equipment or personnel, causing serious safety accidents. Summary of the Invention

[0003] The purpose of the present invention is to provide a movable gantry crane to solve the defects of the existing gantry crane, such as the short service life of the sliding wire rope and the inability to stop in time.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a movable gantry crane, comprising a gantry support frame and a track; tracks are laid and installed on both sides of the bottom end of the gantry support frame, brake mechanisms are provided at both ends of the bottom of the gantry support frame, rollers are movably installed at the bottom end of the gantry support frame, an electric hoist is movably installed at the top of the gantry support frame, and a lubrication mechanism is installed on one side bolt of the electric hoist, a steel wire rope is wound around the inside of the electric hoist, and a hook is movably installed at the end of the steel wire rope; the lubrication mechanism includes a bracket, positive and negative racks, and an extrusion plate , a second gear, a third gear, a second spring, a second rack and a fourth gear; the bracket bolt is installed on one side of the electric hoist, and a forward and reverse rack is provided through the inside of the bracket, and the top of the forward and reverse rack is rotatably installed with the second gear, the second gear is connected to one side of the electric hoist through a rotating shaft, and the bottom of the forward and reverse rack is rotatably installed with the third gear, and the second spring is fixedly installed on both sides of the forward and reverse rack, the fourth gear is rotatably installed on one side of the bracket, and the second rack is slidably provided on one side of the bracket at both ends of the fourth gear, and an extrusion plate is fixedly installed on one side of the second rack.

[0005] Preferably, the braking mechanism includes a fan blade, a first gear, a stop block, a brake block, a first rack and a first spring. The fan blade is rotatably mounted on both ends of the bottom of the portal support frame, and one end of the fan blade is fixedly mounted with a first gear.

[0006] Preferably, a first rack is movably provided on one side of the first gear, and the first rack is meshed with the first gear, and a brake block is slidably installed on the bottom end of the first rack.

[0007] Preferably, a stop block is provided on one side of the bottom of the brake block, and the stop block and the end close to the brake block are inclined at matching angles, and a first spring is fixedly installed on the top of the first rack.

[0008] Preferably, the forward and reverse racks are meshed with the second gear, and the forward and reverse racks are meshed with the third gear.

[0009] Preferably, the extrusion plate includes a brush, a sponge pad, a slide groove, a connecting rod, a piston and an oil outlet hole, the brush bolt is installed at the bottom end of the extrusion plate, and the sponge pad is fixedly installed at the opposite end of the extrusion plate.

[0010] Preferably, an oil outlet hole is provided at the bottom of the outer wall of the extrusion plate at one end of the sponge pad, a piston is movably provided inside the extrusion plate at the top end of the brush, and a connecting rod is hingedly installed on one side of the piston.

[0011] Preferably, a slide groove is fixedly installed on one side of the bracket on one side of the connecting rod, and a sliding structure is formed between the slide groove and the connecting rod.

[0012] Preferably, the number of teeth on the second rack is the same as the number of teeth on both ends of the forward and reverse racks, and the second rack is meshed with the fourth gear. A spur gear is fixedly installed on one side of the fourth gear through a rotating shaft, and the spur gear is meshed with the third gear.

[0013] The movable gantry crane provided by the present invention has the following advantages: By providing a lubrication mechanism, when the electric hoist rotates forward to pull the wire rope to lift the heavy object, it drives the second gear to rotate forward so that the forward and reverse racks move upward, and the third gear meshing with it is reversed, and the fourth gear is rotated forward through the spur gear, driving the second rack to move closer to the middle at the same time, so that the sponge pad and the brush fixed thereto partially overlap. The brush and sponge pad can clean the surface of the wire rope moving upward, avoiding the accumulation of impurities between the wire rope and the pulley and drum, reducing transmission efficiency and increasing energy consumption; Furthermore, the extrusion plate moves toward the middle, causing the connecting rod to slide inside the slide groove. When sliding to the innermost end, the connecting rod is squeezed vertically, pushing the piston to move to one side inside the extrusion plate. A sealing nozzle is provided inside the oil outlet. When squeezed, lubricating oil sprays out from the oil outlet and contacts the sponge pad. When the wire rope moves upward, it fully contacts its surface, making lubrication uniform, thereby reducing the friction between the wire rope of the gantry crane and components such as the pulley and drum, and extending its service life. By providing a brake mechanism, in windy weather, the strong wind flow drives the fan blades to rotate, and the first rack is moved downward by the rotation of the first gear. When it moves to the position of the stop block, the angle between the cut angles is matched, so that the brake block moves downward and forward at the same time, firmly clamping the bottom of the roller. When the strong wind stops, the first spring drives the first rack to rise through the tensile force, so that the brake block leaves the bottom of the roller, and the roller loses the engagement and can move again, so that the gantry crane can automatically stop in windy weather, and timely braking can prevent the crane from sliding, thereby enhancing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from the right side; Figure 2 This is a left-view three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the steel wire rope of the present invention when viewed from above; Figure 4 This is a schematic diagram of the three-dimensional structure of the steel wire rope of the present invention from a top view; Figure 5 It is a schematic diagram of the three-dimensional structure of the electric hoist of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the bracket of the present invention when viewed from above; Figure 7This is a schematic diagram of the three-dimensional structure of the bracket of the present invention from a top view; Figure 8 This is a schematic diagram of the three-dimensional structure of the extruded plates in the combined state of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the extruded plate in a cutaway state of the present invention; Figure 10 It is a schematic diagram of the three-dimensional structure of the brake mechanism of the present invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the brake block of the present invention in a stopped state; Figure 12 For the present invention Figure 7 A partial enlarged schematic diagram of the three-dimensional structure at point A in the middle.

[0015] Explanation of the reference numerals in the figure: 1. Gantry support frame; 2. Track; 3. Braking mechanism; 31. Fan blade; 32. First gear; 33. Stop block; 34. Braking block; 35. First rack; 36. First spring; 4. Electric hoist; 5. Lubrication mechanism; 51. Bracket; 52. Positive and negative racks; 53. Extrusion plate; 531. Brush; 532. Sponge pad; 533. Slide groove; 534. Connecting rod; 535. Piston; 536. Oil outlet; 54. Second gear; 55. Third gear; 56. Second spring; 57. Second rack; 58. Fourth gear; 6. Wire rope; 7. Hook; 8. Roller. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figures 1-12The present invention provides a movable gantry crane, comprising a gantry support frame 1 and a track 2; tracks 2 are laid and installed on both sides of the bottom end of the gantry support frame 1, brake mechanisms 3 are provided at both ends of the bottom of the gantry support frame 1, rollers 8 are movably installed at the bottom end of the gantry support frame 1, an electric hoist 4 is movably installed on the top of the gantry support frame 1, and a lubrication mechanism 5 is installed on one side bolt of the electric hoist 4, a steel wire rope 6 is wound around the inside of the electric hoist 4, and a hook 7 is movably installed at the end of the steel wire rope 6, the brake mechanism 3 includes a fan blade 31, a first gear 32, a stop block 33, a brake block 34, a first The rack 35 and the first spring 36, the fan blade 31 is rotatably mounted on both ends of the bottom of the portal support frame 1, one end of the fan blade 31 is fixedly mounted with a first gear 32, one side of the first gear 32 is movably provided with a first rack 35, and the first rack 35 and the first gear 32 are meshed and connected, the bottom end of the first rack 35 is slidably mounted with a brake block 34, one side of the bottom of the brake block 34 is provided with a stop block 33, the stop block 33 is welded and fixed to the bottom of the portal support frame 1, and the end close to the stop block 33 and the brake block 34 is inclined at a matching angle, and the top of the first rack 35 is fixedly mounted with a first spring 36; Reference Figure 1 、 Figure 10 and Figure 11 As shown, when the device is in use, because the device itself is a large device, it will not move in the case of level 3 or 4 strong winds. When it is level 5 or 6 or even higher, it needs to be braked urgently. Since two sets of brake mechanisms 3 are provided on each track 2, and the fan blades 31 inside thereof face opposite directions, when a strong wind blows from any direction, it will drive the fan blades 31 on one set of brake mechanisms 3 to rotate, and the first rack 35 is moved downward by the rotation of the first gear 32. When it moves to the position of the block 33, the first rack 35 is moved downward by the rotation of the first gear 32. When it moves to the position of the block 33, the first rack 35 is moved downward by the rotation of the first gear 32. When the first rack 35 moves downward by the rotation of the first gear 32, the first rack 35 is moved downward by the rotation of the first gear 32. When the first rack 35 moves to the position of the block 3 ... The cut angles are aligned, so that the brake block 34 moves downward and forward at the same time, firmly locking the bottom of the roller 8. At this time, the first rack 35 moves downward to stretch the first spring 36. When the strong wind stops, the first rack 35 is pulled upward under the restoring force of the first spring 36, so that the brake block 34 leaves the bottom of the roller 8, and the roller 8 loses the engagement and can move again. When the wind level is too low, the fan blade 31 cannot drive the rack to work, so that the gantry crane can automatically stop in strong winds, and timely braking can prevent the crane from sliding, thereby enhancing safety. The lubricating mechanism 5 includes a bracket 51, a forward and reverse rack 52, an extrusion plate 53, a second gear 54, a third gear 55, a second spring 56, a second rack 57 and a fourth gear 58; the bracket 51 is bolted to one side of the electric hoist 4, and a forward and reverse rack 52 is provided inside the bracket 51, and the top of the forward and reverse rack 52 is rotatably installed with the second gear 54, and the second gear 54 is connected to one side of the electric hoist 4 through a rotating shaft, and the bottom of the forward and reverse rack 52 is rotatably installed with the third gear 55, and both sides of the forward and reverse rack 52 are fixedly installed with a second spring 56, and one side of the bracket 51 at both ends of the fourth gear 58 is rotatably installed with a second rack 57, and one side of the second rack 57 is fixedly installed with an extrusion plate 53, and the forward and reverse rack 52 and the second gear 54 are meshed and connected, and the forward and reverse rack 52 and the third gear 55 are meshed and connected, and the number of teeth on the second rack 57 is respectively the same as that on the The number of teeth at both ends of the positive and negative racks 52 is the same, and the second rack 57 and the fourth gear 58 are meshed together. A spur gear is fixedly installed on one side of the fourth gear 58 through a rotating shaft. The rotating shaft passes through the bottom end of the bracket 51 horizontally, and the two form a rotation connection. The spur gear is meshed with the third gear 55. The extrusion plate 53 includes a brush 531, a sponge pad 532, a slide groove 533, a connecting rod 534, a piston 535 and an oil outlet 536. The brush 531 is bolted to At the bottom end of the extrusion plate 53, a sponge pad 532 is fixedly mounted on the opposite end of the extrusion plate 53. An oil outlet hole 536 is provided at the bottom of the outer wall of the extrusion plate 53 at one end of the sponge pad 532. A piston 535 is movably provided inside the extrusion plate 53 at the top end of the brush 531. A connecting rod 534 is hingedly mounted on one side of the piston 535. A sliding groove 533 is fixedly mounted on one side of the bracket 51 on one side of the connecting rod 534. A sliding structure is formed between the sliding groove 533 and the connecting rod 534. Reference Figure 3 、 Figure 7 、 Figure 8 and Figure 9 As shown, when the device is used, a heavy object is placed in the hook 7. A tension spring is provided on one side of the hook 7. When there is no gravity, the hook 7 is pulled to tilt and automatically unload. When the heavy object is pulled downward, the hook 7 overlaps with the top to prevent it from falling off. After the heavy object is placed, the electric hoist 4 is started to rotate forward to pull the wire rope 6 to lift the heavy object, so that the second gear 54 connected thereto rotates forward at the same time, driving the forward and reverse racks 52 to move upward. Figure 6 and Figure 7The second gear 57 is driven by the gear 534 and the second gear 535 is driven by the gear 536. The gear 536 is driven by the gear 537 and the second gear 538 is driven by the gear 539. The second gear 54 rotates in the opposite direction, and the second gear 54 rotates in the opposite direction. Due to the tension of the second spring 56, when the second gear 54 stops rotating forward and reverses, the forward and reverse racks 52 are pulled downward, so that they mesh with the second gear 54. When the teeth rotate, they continue to idle, and through the cooperation between the second rack 57 and the fourth gear 58, the squeezing plate 53 moves to both ends and opens, away from the wire rope 6. When the squeezing plate 53 opens to the initial position, it drives the connecting rod 534 to slide to the outermost end inside the slide groove 533, thereby pulling the piston 535 to reset. Figure 12 , the gas enters the extrusion plate 53 from the air intake one-way valve to discharge the lubricating oil next time.

[0018] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A movable gantry crane, comprising a gantry support frame (1) and a track (2); Features: Tracks (2) are installed on both sides of the bottom of the portal support frame (1), brake mechanisms (3) are provided at both ends of the bottom of the portal support frame (1), rollers (8) are movably installed at the bottom of the portal support frame (1), an electric hoist (4) is movably installed at the top of the portal support frame (1), and a lubrication mechanism (5) is installed on a bolt on one side of the electric hoist (4), a steel wire rope (6) is wound around the inside of the electric hoist (4), and a hook (7) is movably installed at the end of the steel wire rope (6); The lubrication mechanism (5) comprises a bracket (51), a forward and reverse rack (52), a pressing plate (53), a second gear (54), a third gear (55), a second spring (56), a second rack (57) and a fourth gear (58); The bracket (51) is bolted to one side of the electric hoist (4); a forward and reverse rack (52) is provided inside the bracket (51); a second gear (54) is rotatably provided on the top of the forward and reverse rack (52); the second gear (54) is connected to one side of the electric hoist (4) via a rotating shaft; a third gear (55) is rotatably provided on the bottom of the forward and reverse rack (52); second springs (56) are fixedly provided on both sides of the forward and reverse rack (52); a fourth gear (58) is rotatably provided on one side of the bracket (51); second gears (57) are slidably provided on one side of the bracket (51) at both ends of the fourth gear (58); and a pressing plate (53) is fixedly provided on one side of the second gear (57).

2. A movable gantry crane according to claim 1, Features: The brake mechanism (3) comprises a fan blade (31), a first gear (32), a stop block (33), a brake block (34), a first rack (35) and a first spring (36); the fan blade (31) is rotatably mounted on both ends of the bottom of the door-type support frame (1); and one end of the fan blade (31) is fixedly mounted with the first gear (32).

3. A movable gantry crane according to claim 2, Features: A first rack (35) is movably provided on one side of the first gear (32), and the first rack (35) and the first gear (32) are meshingly connected, and a brake block (34) is slidably mounted on the bottom end of the first rack (35).

4. A movable gantry crane according to claim 3, Features: A stopper (33) is provided on one side of the bottom of the brake block (34), and the stopper (33) and the brake block (34) are close to each other at a matching angle. A first spring (36) is fixedly mounted on the top of the first rack (35).

5. A movable gantry crane according to claim 1, Features: The forward and reverse racks (52) and the second gear (54) are meshingly connected, and the forward and reverse racks (52) and the third gear (55) are meshingly connected.

6. A movable gantry crane according to claim 1, Features: The extrusion plate (53) comprises a brush (531), a sponge pad (532), a slide groove (533), a connecting rod (534), a piston (535) and an oil outlet hole (536); the brush (531) is bolted to the bottom end of the extrusion plate (53), and the sponge pad (532) is fixedly mounted to an opposite end of the extrusion plate (53).

7. A movable gantry crane according to claim 6, Features: An oil outlet hole (536) is provided at the bottom of the outer wall of the extrusion plate (53) at one end of the sponge pad (532), a piston (535) is movably provided inside the extrusion plate (53) at the top end of the brush (531), and a connecting rod (534) is hingedly installed on one side of the piston (535).

8. A movable gantry crane according to claim 7, Features: A sliding groove (533) is fixedly mounted on one side of the bracket (51) on one side of the connecting rod (534), and a sliding structure is formed between the sliding groove (533) and the connecting rod (534).

9. A movable gantry crane according to claim 1, Features: The number of teeth on the second rack (57) is respectively the same as the number of teeth on both ends of the forward and reverse racks (52), and the second rack (57) is meshingly connected to a fourth gear (58), a spur gear is fixedly mounted on one side of the fourth gear (58) via a rotating shaft, and the spur gear is meshingly connected to the third gear (55).

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