A gantry crane

Abstract

The present invention discloses a gantry crane, belonging to the field of cranes. A gantry crane includes a frame body and a cross beam fixed on its top, and further includes: a moving plate that slides along the long axis direction of the cross beam, a moving part for driving the sliding is arranged on the moving plate, a hoist is arranged on the moving plate, a steel wire rope is wound and connected to the reel of the hoist, and a lubricating part for applying lubricating liquid to the outer wall of the steel wire rope is arranged at the bottom of the moving plate; through the frictional action between the lubricating wheel and the steel wire rope, the lubricant is evenly applied to the steel wire rope, effectively reducing the possibility of friction, wear and fracture between the strands of the steel wire rope, improving the durability of the steel wire rope, and ensuring the safety of lifting; and with the setting of the liquid sealing plate, after the lifting is completed, the supply of the lubricating liquid is cut off, avoiding the waste of the lubricant and reducing the loss of the lubricant.

Description

Technical Field

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

[0002] Gantry crane is a kind of equipment used for lifting and carrying heavy objects, and is widely used in various ports for loading, unloading and handling of goods. Its main feature is that it can be controlled by a remote control system to move along the corresponding track or the wheels installed at its bottom on the ground, and can move across a certain range by controlling the movement of the lifting parts at its end, so as to cover a larger working area, so as to carry out the lifting and handling of large heavy objects, and improve work efficiency and safety.

[0003] At present, during the lifting process, the strands of the wire rope will be squeezed against each other due to the tension generated by the weight of the cargo, which will easily cause the strands of the wire rope to wear or even break, reducing the durability of the wire rope and the safety of the lifting; and the gantry crane with wheels is prone to sliding during the lifting process, reducing the stability and safety of the lifting. Although the wheels are usually equipped with a self-locking structure, they need to be opened and closed manually, thereby reducing the lifting efficiency. Therefore, a gantry crane is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the strands of the wire rope are prone to wear and even breakage; and the gantry crane with wheels is prone to sliding during the lifting process, resulting in insufficient stability, and to propose a gantry crane.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A gantry crane comprises a frame and a crossbeam fixed on the top thereof, and further comprises: a movable plate sliding along the long axis direction of the crossbeam, the movable plate being provided with a movable part driving the sliding thereof, the movable plate being provided with a winch, a reel of the winch being wound with a steel wire rope, the bottom end of the steel wire rope passing through the movable plate extending to the bottom of the crossbeam and being fixedly connected with a hook, and a lubrication part for applying lubricating liquid to the outer wall of the steel wire rope being provided at the bottom of the movable plate; a movable seat fixed at the bottom of the frame, the bottoms of both ends of the movable seat being rotatably connected with movable wheels, and a positioning part for locking the movable wheels being provided on the movable seat.

[0007] To facilitate the sliding of the movable plate, preferably, the movable part includes two groups of driving wheels, limiting sliding grooves are provided on both sides of the crossbeam, the two groups of driving wheels are respectively clamped in the limiting sliding grooves on both sides, and the end parts of the rotating shafts of the driving wheels are rotatably connected to the movable plate, and a driving motor is fixedly connected to the side wall of the movable plate, and the output shaft of the driving motor is connected to the rotating shaft of the driving wheel on the same side through a gear set.

[0008] In order to improve the durability of the wire rope, preferably, the lubrication part includes a lubrication pan, which is fixed at the bottom of the movable plate, and both sides of the inner cavity of the lubrication pan are rotatably connected with lubrication wheels, the wire rope passes through the centers of the lubrication wheels on both sides and fits with the side walls thereof, and both sides of the top of the movable plate are fixedly connected with lubrication boxes, the lubrication box and the lubrication pan are communicated with a liquid guide tube, and both sides of the inner wall of the lubrication pan are fixedly connected with liquid guide pans, the liquid guide tubes are located directly above the liquid guide pan, and the output end of the liquid guide pan is located above the lubrication wheels.

[0009] In order to improve the smoothness of sliding of the movable plate, preferably, auxiliary sliding grooves are opened inside both sides of the top of the movable plate, and auxiliary pulleys are rotatably connected in the auxiliary sliding grooves, and the auxiliary pulleys slide in contact with the top of the beam.

[0010] In order to improve the utilization effect of the lubricating liquid, preferably, the bottom of the movable plate is fixedly connected with a liquid extraction box, the rotating shaft of the auxiliary pulley passes through the liquid extraction box and is fixedly connected with a liquid extraction blade, the side wall of the liquid extraction box is fixed and connected with a liquid extraction tube, the other end of the liquid extraction tube is connected with the bottom of the inner cavity of the lubrication disk, lubrication guide grooves are provided on both sides of the crossbeam, the bottom of the liquid extraction box is located in the lubrication guide groove and moves along its upper axis direction, the lubrication guide groove is connected with the inner cavity of the limiting slide groove, and a drainage hole is provided at the bottom of the liquid extraction box.

[0011] In order to prevent the lubricating liquid from dripping, further, a drip-proof ring is fixedly connected to the bottom of the lubrication tray, a liquid-absorbing cotton is fixedly connected to the inner wall of the drip-proof ring, and the steel wire rope passes through the center of the inner cavity of the drip-proof ring.

[0012] In order to improve the stability during lifting, preferably, the positioning part includes a locking tooth block, a locking groove is opened in the middle of the moving wheel, a locking tooth disk is fixedly connected to the rotating shaft of the moving wheel located in the locking groove, locking boxes are fixedly connected on both sides of the moving seat, a locking slider is slidably connected in the locking box, a first spring is fixedly connected between the top of the locking slider and the locking box, the locking tooth block is fixed to the bottom of the locking slider, and the locking tooth block is located directly above the locking tooth disk, and an inflatable part for pushing the locking slider downward is provided on the moving plate.

[0013] Furthermore, the inflation part includes a piston warehouse, which is fixed on the top of the movable plate, a piston plate is slidably connected in the piston warehouse, a second spring is fixedly connected between the two sides of the bottom of the piston plate and the piston warehouse, the winch is fixed on the top of the piston plate, and air ducts are respectively fixed and connected on both sides of the piston warehouse, and the output end of the air duct is connected to the top of the inner cavity of the locking box.

[0014] In order to reduce lubricant loss, preferably, both sides of the bottom of the piston plate are fixedly connected with liquid sealing plates, and the liquid sealing plates penetrate downward into the lubrication disk. The side walls of the liquid sealing plates are in contact with the output port of the liquid guide tube, and a liquid outlet hole is opened on the liquid sealing plate.

[0015] In order to reduce the wear of the wire rope, preferably, a rope guide tube is fixedly connected to the bottom center of the piston plate, the top inner cavity of the rope guide tube penetrates upward to the winding drum of the winch, the bottom end of the rope guide tube penetrates into the lubrication disk, the wire rope passes through the rope guide tube, and the inner diameter of the rope guide tube is larger than the outer diameter of the wire rope.

[0016] Compared with the prior art, the present invention provides a gantry crane with the following beneficial effects:

[0017] 1. The gantry crane uses the friction between the lubrication wheel and the wire rope to evenly spread the lubricant on the wire rope, effectively reducing the possibility of friction, wear and breakage between the strands of the wire rope, improving the durability of the wire rope and ensuring the safety of lifting. In addition, with the setting of the sealing plate, the supply of lubricating liquid is cut off after the lifting is completed, avoiding the waste of lubricant and reducing the loss of lubricant.

[0018] 2. The gantry crane transports the lubricant dripping into the lubrication tray to the limiting slide groove through the auxiliary pulley, the pumping blade and the pumping pipe, so as to lubricate the outer wall of the driving wheel, reduce the friction loss between the driving wheel and the limiting slide groove, and reuse the dripped lubricant, effectively reducing the loss of lubricant and improving the utilization effect of the lubricant.

[0019] 3. The gantry crane uses the gravity of the hoisted goods, in conjunction with the settings of the piston plate, air guide pipe, locking slider, locking gear block and locking gear disc, to achieve the plug-in locking of the moving wheel, thereby improving the stability and safety during the lifting process; and without human intervention, it can automatically lock and unlock the goods during the lifting process, effectively improving the lifting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a gantry crane proposed by the present invention;

[0021] Figure 2A half-section front view structural schematic diagram of a crossbeam of a gantry crane proposed by the present invention;

[0022] Figure 3 A schematic diagram of a half-sectioned bottom view of the crossbeam of a gantry crane proposed by the present invention;

[0023] Figure 4 A schematic diagram of a partial cross-sectional structure of a moving seat of a gantry crane proposed by the present invention;

[0024] Figure 5 A gantry crane proposed by the present invention Figure 4 A schematic diagram of the enlarged structure of the middle A area;

[0025] Figure 6 A schematic diagram of a half-section structure of a piston chamber of a gantry crane proposed by the present invention;

[0026] Figure 7 A gantry crane proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of the middle B area;

[0027] Figure 8 A schematic diagram of a half-section structure of a lubrication disk of a gantry crane proposed by the present invention;

[0028] Fig. 9 A gantry crane proposed by the present invention Figure 8 Schematic diagram of the enlarged structure of the middle C area.

[0029] In the figure: 1, frame; 2, crossbeam; 21, limit slide; 22, lubrication guide; 3, moving plate; 31, hoist; 32, wire rope; 33, hook; 34, pumping box; 341, pumping blade; 342, pumping tube; 343, drain hole; 4, moving seat; 41, moving wheel; 5, driving wheel; 51, driving motor; 52, gear set; 53, auxiliary slide; 531, auxiliary pulley; 6, lubrication plate ; 61. Lubrication wheel; 62. Lubrication box; 63. Liquid guide tube; 64. Liquid guide plate; 65. Anti-drip ring; 651. Liquid absorbent cotton; 7. Locking tooth block; 71. Locking groove; 711. Locking tooth plate; 72. Locking box; 721. Locking slider; 722. First spring; 73. Piston chamber; 731. Piston plate; 732. Second spring; 733. Air guide tube; 8. Liquid sealing plate; 81. Liquid outlet; 9. Guide rope tube. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 cannot be understood as a limitation on the present invention.

[0032] Example:

[0033] Reference Figure 1-Figure 9 A gantry crane comprises a frame 1 and a beam 2 fixed on the top thereof, and further comprises: a movable plate 3 sliding along the long axis direction of the beam 2, the movable plate 3 being provided with a movable part driving the sliding thereof, the movable plate 3 being provided with a winch 31, a steel wire rope 32 being wound and connected on the reel of the winch 31, the bottom end of the steel wire rope 32 passing through the movable plate 3 extending to the bottom of the beam 2 and being fixedly connected with a hook 33, and a lubricating part for applying lubricating liquid to the outer wall of the steel wire rope 32 being provided at the bottom of the movable plate 3; a movable seat 4 fixed at the bottom of the frame 1, the bottoms of both ends of the movable seat 4 being rotatably connected with movable wheels 41, and a positioning part for locking the movable wheel 41 being provided on the movable seat 4.

[0034] Reference Figure 1 , Figure 4 and Figure 5 , wherein the positioning portion includes a locking tooth block 7, a locking groove 71 is opened in the middle of the moving wheel 41, a locking tooth disk 711 is fixedly connected to the rotating shaft of the moving wheel 41 located in the locking groove 71, and locking boxes 72 are fixedly connected on both sides of the moving seat 4, and a locking slider 721 is slidably connected in the locking box 72, and a first spring 722 is fixedly connected between the top of the locking slider 721 and the locking box 72, and the locking tooth block 7 is fixed to the bottom of the locking slider 721, and the locking tooth block 7 is located just above the locking tooth disk 711 The movable plate 3 is provided with an inflatable part for pushing the locking slider 721 downward; the inflatable part includes a piston bin 73, the piston bin 73 is fixed on the top of the movable plate 3, a piston plate 731 is slidably connected in the piston bin 73, and second springs 732 are fixedly connected between the two sides of the bottom of the piston plate 731 and the piston bin 73, the winch 31 is fixed on the top of the piston plate 731, and air guide pipes 733 are respectively fixed and connected on both sides of the piston bin 73, and the output end of the air guide pipe 733 is connected to the top of the inner cavity of the locking box 72.

[0035] By setting the above structure, the winch 31 is turned on, so that the wire rope 32 is wound around its reel, so that the cargo is lifted. When the cargo is gradually lifted, under the action of gravity, the piston plate 731 will be pulled downward, so as to compress the gas in the piston chamber 73 and allow the gas to enter the locking box 72 along the air guide pipe 733, so as to push the locking slider 721 downward, so that the locking tooth block 7 is plugged into the locking tooth disk 711, and a meshing locking effect is formed, so that the moving wheel 41 will not move again during the lifting process, thereby improving the stability and safety of the lifting process; and without manual intervention, the locking and unlocking can be performed automatically during the lifting of the cargo, which effectively improves the lifting efficiency; and when the cargo is not lifted, the position of the device can be changed by the moving wheel 41, thereby improving the convenience of use.

[0036] Reference Figure 2 , Figure 3 The moving part includes two sets of driving wheels 5, and limiting sliding grooves 21 are provided on both sides of the crossbeam 2. The two sets of driving wheels 5 are respectively clamped in the limiting sliding grooves 21 on both sides, and the ends of the rotating shafts of the driving wheels 5 are rotatably connected to the moving plate 3. A driving motor 51 is fixedly connected to the side wall of the moving plate 3, and the output shaft of the driving motor 51 is connected to the rotating shaft of the driving wheel 5 on the same side through a gear set 52.

[0037] Through the arrangement of the above structure, when the cargo is lifted, the driving motor 51 is turned on to drive the driving wheel 5 to rotate. Under the action of the gravity and friction of the cargo, the movable plate 3 will move along the beam 2 to the loading area, so as to move the lifted cargo, thereby improving the convenience of lifting and loading.

[0038] Reference Figure 6 , Figure 8 and Fig. 9 , wherein the lubrication part includes a lubrication disk 6, which is fixed at the bottom of the movable plate 3, and both sides of the inner cavity of the lubrication disk 6 are rotatably connected with lubrication wheels 61, and the wire rope 32 passes through the center of the lubrication wheels 61 on both sides and fits with its side walls, and both sides of the top of the movable plate 3 are fixedly connected with lubrication boxes 62, and the lubrication box 62 is connected to the lubrication disk 6 through a liquid guide tube 63, and both sides of the inner wall of the lubrication disk 6 are fixedly connected with liquid guide disks 64, and the liquid guide tube 63 is located directly above the liquid guide disk 64, and the output end of the liquid guide disk 64 is located above the lubrication wheel 61; both sides of the bottom of the piston plate 731 are fixedly connected with liquid sealing plates 8, and the liquid sealing plates 8 penetrate downward into the lubrication disk 6, and the side walls of the liquid sealing plates 8 fit with the output port of the liquid guide tube 63, and the liquid sealing plates 8 are provided with liquid outlet holes 81.

[0039] By setting the above structure, when the piston plate 731 moves downward, the sealing plate 8 will be pushed to move downward, so that the liquid outlet hole 81 is connected with the output port of the liquid guide tube 63. At this time, the lubricating liquid will drip into the liquid guide plate 64 along the liquid guide tube 63, and then slide along the liquid guide plate 64 to the lubrication wheel 61. Under the action of friction, when the wire rope 32 is wound upward, the lubrication wheel 61 will be pulled to rotate, so that the lubricant adhered to the surface of the lubrication wheel 61 is evenly applied to the wire rope 32, effectively reducing the possibility of friction, wear and breakage between the strands of the wire rope 32, improving the durability of the wire rope 32, and ensuring the safety of lifting and hoisting; and when the lifting of the goods is completed, the wire rope 32 is subjected to the effect of gravity. At this time, under the rebound action of the second spring 732, the piston plate 731 will be reset, so that the sealing plate 8 moves upward and the output port of the liquid guide tube 63 is blocked, thereby cutting off the supply of lubricating liquid, avoiding the waste of lubricant, and reducing the loss of lubricant.

[0040] In addition, during the process of the lubrication wheel 61 coating the wire rope 32, a portion of the lubricating liquid will drip into the lubrication pan 6 and slide along the arc-shaped wall of the lubrication pan 6 to its bottom for collection, so that the dripping lubricant can be reused later, thereby improving the utilization effect of the lubricant.

[0041] Reference Figure 8 , Fig. 9 Among them, a drip-proof ring 65 is fixedly connected to the bottom of the lubrication tray 6, and a liquid-absorbing cotton 651 is fixedly connected to the inner wall of the drip-proof ring 65, and the wire rope 32 passes through the center of the inner cavity of the drip-proof ring 65; the lubricating liquid applied to the wire rope 32 will slide downward along the wire rope 32 due to gravity. At this time, the setting of the liquid-absorbing cotton 651 can collect the dripping lubricant, so that not only the wire rope 32 that passes through the liquid-absorbing cotton 651 later can be lubricated, thereby improving the utilization effect of the lubricating liquid, but also the lubricating liquid can be prevented from overflowing onto the goods, thereby improving the protection effect.

[0042] Reference Figure 6-Figure 8 Among them, auxiliary slide grooves 53 are opened inside both sides of the top of the movable plate 3, and an auxiliary pulley 531 is rotatably connected in the auxiliary slide groove 53, and the auxiliary pulley 531 slides in contact with the top of the beam 2; a liquid extraction box 34 is fixedly connected to the bottom of the movable plate 3, and the rotating shaft of the auxiliary pulley 531 passes through the liquid extraction box 34 and is fixedly connected to a liquid extraction blade 341. The side wall of the liquid extraction box 34 is fixed and connected with a liquid extraction tube 342, and the other end of the liquid extraction tube 342 is connected with the bottom of the inner cavity of the lubrication disk 6; lubrication guide grooves 22 are opened on both sides of the beam 2, and the bottom of the liquid extraction box 34 is located in the lubrication guide grooves 22 and moves along its upper axis direction. The lubrication guide grooves 22 are connected with the inner cavity of the limiting slide grooves 21, and a drainage hole 343 is opened at the bottom of the liquid extraction box 34.

[0043] Through the arrangement of the above structure, when the movable plate 3 moves, the auxiliary pulley 531 will rotate against the top of the cross beam 2, thereby driving the liquid extraction blade 341 in the liquid extraction box 34 to rotate, thereby generating a suction effect on the side of the liquid extraction box 34 close to the liquid extraction tube 342, so that the lubricating liquid dripping to the bottom of the lubrication disk 6 enters the liquid extraction box 34 along the liquid extraction tube 342, and then drips from the drainage hole 343 into the lubrication guide groove 22, and finally slides into the limiting slide groove 21, so as to lubricate the outer wall of the driving wheel 5, reduce the friction loss generated between it and the limiting slide groove 21, and at the same time realize the reuse of the lubricant after dripping, effectively reducing the loss of the lubricant and improving the utilization effect of the lubricant.

[0044] Reference Figure 6 , Figure 8 and Fig. 9 Among them, a rope guide tube 9 is fixedly connected to the bottom center of the piston plate 731, the top inner cavity of the rope guide tube 9 penetrates upward to the winding disk of the winch 31, and the bottom end of the rope guide tube 9 penetrates into the lubrication disk 6. The wire rope 32 passes through the rope guide tube 9, and the inner diameter of the rope guide tube 9 is larger than the outer diameter of the wire rope 32. This can effectively reduce the wear of the wire rope 32 when passing through various components, increase the service life of the wire rope 32, and ensure the safety of lifting.

[0045] Reference Figure 1-Figure 9 In the present invention, when in use, the hook 33 is hooked on the cargo to be lifted, and the winch 31 is turned on at the same time, so that the wire rope 32 is wound around its reel, so as to lift the cargo. When the cargo is gradually lifted, under the action of gravity, the piston plate 731 will be pulled downward, thereby compressing the gas in the piston chamber 73 and allowing the gas to enter the locking box 72 along the air guide pipe 733, thereby pushing the locking slider 721 to move downward, so that the locking tooth block 7 is plugged into the locking tooth disk 711, and a meshing locking effect is formed, so that the moving wheel 41 will no longer move during the lifting process, thereby improving the stability of the lifting and hoisting. When the piston plate 731 moves downward, the sealing plate 8 will be pushed downward, so that the liquid outlet 81 is connected with the output port of the liquid guide tube 63. At this time, the lubricating liquid will drip into the liquid guide plate 64 along the liquid guide tube 63, and then slide along the liquid guide plate 64 to the lubrication wheel 61. Under the action of friction, when the wire rope 32 is wound upward, the lubrication wheel 61 will be pulled to rotate, so that the lubricant adhered to the surface of the lubrication wheel 61 is evenly applied to the wire rope 32, effectively reducing the possibility of friction, wear and breakage between the strands of the wire rope 32, thereby improving the durability of the wire rope 32 and ensuring the safety of lifting.

[0046] When the cargo is lifted, the driving motor 51 is turned on to drive the driving wheel 5 to rotate. Under the action of the cargo gravity and friction, the movable plate 3 will move along the beam 2 to the loading area. When the movable plate 3 moves, the auxiliary pulley 531 will rotate against the top of the beam 2, thereby driving the liquid extraction blade 341 in the liquid extraction box 34 to rotate, thereby generating a suction effect on the side of the liquid extraction box 34 close to the liquid extraction tube 342, so that the lubricating liquid dripping to the bottom of the lubrication disk 6 enters the liquid extraction box 34 along the liquid extraction tube 342, and then drips from the drainage hole 343 into the lubrication guide groove 22, and finally slides into the limiting slide groove 21, thereby lubricating the outer wall of the driving wheel 5, reducing the friction loss between it and the limiting slide groove 21, and at the same time realizing the reuse of the dripped lubricant, effectively reducing the loss of lubricant and improving the energy saving effect.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gantry crane, comprising a frame (1) and a crossbeam (2) fixed on the top thereof, characterized in that: Also includes: A movable plate (3) slides along the long axis direction of the cross beam (2), the movable plate (3) is provided with a movable part for driving the sliding movement, the movable plate (3) is provided with a winch (31), a steel wire rope (32) is wound around the reel of the winch (31), the bottom end of the steel wire rope (32) passes through the movable plate (3) and extends to the bottom of the cross beam (2) and is fixedly connected with a hook (33), and a lubricating part for applying lubricating liquid to the outer wall of the steel wire rope (32) is provided at the bottom of the movable plate (3); A moving seat (4) is fixed at the bottom of the frame (1), and the bottoms of both ends of the moving seat (4) are rotatably connected to moving wheels (41), and a positioning portion for locking the moving wheels (41) is provided on the moving seat (4).

2. A gantry crane according to claim 1, characterized in that: The moving part comprises two groups of driving wheels (5), both sides of the cross beam (2) are provided with limiting sliding grooves (21), the two groups of driving wheels (5) are respectively clamped in the limiting sliding grooves (21) on both sides, and the ends of the rotating shafts of the driving wheels (5) are rotatably connected to the moving plate (3), the side wall of the moving plate (3) is fixedly connected with a driving motor (51), and the output shaft of the driving motor (51) is connected to the rotating shaft of the driving wheel (5) on the same side through a gear set (52).

3. A gantry crane according to claim 2, characterized in that: The lubrication part comprises a lubrication plate (6), the lubrication plate (6) is fixed at the bottom of the movable plate (3), both sides of the inner cavity of the lubrication plate (6) are rotatably connected with lubrication wheels (61), the steel wire rope (32) passes through the center of the lubrication wheels (61) on both sides and fits with the side walls thereof, both sides of the top of the movable plate (3) are fixedly connected with lubrication boxes (62), the lubrication box (62) and the lubrication plate (6) are connected through a liquid guide tube (63), both sides of the inner wall of the lubrication plate (6) are fixedly connected with liquid guide plates (64), the liquid guide tube (63) is located directly above the liquid guide plate (64), and the output end of the liquid guide plate (64) is located above the lubrication wheel (61).

4. A gantry crane according to claim 3, characterized in that: Auxiliary sliding grooves (53) are provided inside both sides of the top of the movable plate (3), and an auxiliary pulley (531) is rotatably connected in the auxiliary sliding groove (53), and the auxiliary pulley (531) is slidably fitted with the top of the crossbeam (2).

5. A gantry crane according to claim 4, characterized in that: The bottom of the movable plate (3) is fixedly connected to a liquid extraction box (34); the rotating shaft of the auxiliary pulley (531) passes through the liquid extraction box (34) and is fixedly connected to a liquid extraction blade (341); the side wall of the liquid extraction box (34) is fixed and connected to a liquid extraction tube (342); the other end of the liquid extraction tube (342) is connected to the bottom of the inner cavity of the lubricating plate (6); lubrication guide grooves (22) are provided on both sides of the crossbeam (2); the bottom of the liquid extraction box (34) is located in the lubrication guide grooves (22) and moves along the upper axis direction thereof; the lubrication guide grooves (22) are connected to the inner cavity of the limiting slide groove (21); and a drainage hole (343) is provided at the bottom of the liquid extraction box (34).

6. A gantry crane according to claim 3, characterized in that: The bottom of the lubrication plate (6) is fixedly connected to an anti-drip ring (65), the inner wall of the anti-drip ring (65) is fixedly connected to a liquid-absorbing cotton (651), and the steel wire rope (32) passes through the center of the inner cavity of the anti-drip ring (65).

7. A gantry crane according to claim 3, characterized in that: The positioning part comprises a locking tooth block (7); a locking groove (71) is provided in the middle of the moving wheel (41); a locking tooth disk (711) is fixedly connected to the rotating shaft of the moving wheel (41) located in the locking groove (71); locking boxes (72) are fixedly connected to both sides of the moving seat (4); a locking slider (721) is slidably connected in the locking box (72); a first spring (722) is fixedly connected between the top of the locking slider (721) and the locking box (72); the locking tooth block (7) is fixed to the bottom of the locking slider (721), and the locking tooth block (7) is located directly above the locking tooth disk (711); and an inflatable part for pushing the locking slider (721) to move downward is provided on the moving plate (3).

8. A gantry crane according to claim 7, characterized in that: The inflation portion comprises a piston bin (73), the piston bin (73) being fixed on the top of the movable plate (3), a piston plate (731) being slidably connected in the piston bin (73), second springs (732) being fixedly connected between the two sides of the bottom of the piston plate (731) and the piston bin (73), the winch (31) being fixed on the top of the piston plate (731), air guide pipes (733) being fixed and connected on the two sides of the piston bin (73), and an output end of the air guide pipe (733) being connected to the top of the inner cavity of the locking box (72).

9. A gantry crane according to claim 8, characterized in that: Both sides of the bottom of the piston plate (731) are fixedly connected to a liquid sealing plate (8), the liquid sealing plate (8) penetrates downward into the lubrication disk (6), the side wall of the liquid sealing plate (8) fits with the output port of the liquid guide tube (63), and a liquid outlet hole (81) is opened on the liquid sealing plate (8).

10. A gantry crane according to claim 8, characterized in that: A rope guide tube (9) is fixedly connected to the bottom center of the piston plate (731), the top inner cavity of the rope guide tube (9) extends upward to the winding disk of the winch (31), the bottom end of the rope guide tube (9) extends into the lubrication disk (6), the steel wire rope (32) passes through the rope guide tube (9), and the inner diameter of the rope guide tube (9) is larger than the outer diameter of the steel wire rope (32).

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