Portal crane

Abstract

The utility model discloses a portal crane. The portal crane comprises two supporting columns which are vertically and symmetrically arranged, sliding grooves are formed in the opposite sides of the two supporting columns in the vertical direction of the supporting columns. The upper ends of the two supporting columns are connected with a cross beam; the beam is sleeved with a control module, and the control module can horizontally move in a reciprocating mode in the length direction of the beam. A chain capable of being wound and unwound is wound in the control module, and the bottom end of the chain extends out of the bottom of the control module and is fixedly connected with a lifting block; a lifting hook is fixedly mounted at the bottom of the lifting block; a limiting rod is sleeved with the lifting block in a sliding mode and is horizontally arranged, and the two ends of the limiting rod are inserted into the two sliding grooves correspondingly to be connected in a sliding mode; the lifting block can be driven by the control module to synchronously slide along the sliding groove in a reciprocating lifting mode along with the limiting rod. And the lifting hook can synchronously lift and move along with the lifting block. The lifting hook of the crane can be kept in a stable state in the lifting or translation process, and the conditions of swinging and shaking of the chain and the lifting hook are reduced.

Description

Technical Field

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

[0002] Gantry crane is a variation of bridge crane. In ports, it is mainly used for loading and unloading operations in outdoor cargo yards, material yards, and bulk cargo. Its metal structure is like a door-shaped frame, with two legs installed under the load-bearing main beam, which can run directly on the ground track. Both ends of the main beam can have outward cantilever beams. Gantry cranes have the characteristics of high site utilization, large operating range, wide adaptability, and strong versatility, and are widely used in port cargo yards.

[0003] However, existing cranes are inevitably subject to a great deal of gravity. If they are transported and moved using a rail-type structure, the rails may be easily bent, or even the lifting trolley may fall off the rails, causing damage to the objects and the crane. In addition, existing cranes are prone to deviation or shaking during the process of transporting objects, which increases the risk of using the equipment.

[0004] Therefore, the utility model provides a gantry crane to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a gantry crane, which solves the problems of the above-mentioned crane being derailed due to its own weight and shaking or deflecting during transportation.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A gantry crane comprises two vertically symmetrically arranged pillars; in particular: one side of the two pillars is provided with a slide groove along its own vertical direction; the upper ends of the two pillars are connected and installed with a crossbeam; a control module is mounted on the crossbeam, and the control module can move back and forth horizontally along the length direction of the crossbeam; a chain that can be rolled and retracted is rolled up inside the control module, and the bottom end of the chain extends out of the bottom of the control module and is fixedly connected with a lifting block; a hook is fixedly installed at the bottom of the lifting block; a limit rod is slidably mounted inside the lifting block, and the limit rod is horizontally arranged and its two ends are respectively inserted into the two slide grooves for sliding connection; the lifting block can be driven by the control module and synchronously with the limit rod to reciprocate and slide along the slide groove; the hook can be lifted and moved synchronously with the lifting block.

[0008] Preferably, the control module has two chains wound inside; the two chains are symmetrically arranged along the symmetry planes of the two pillars; and the bottom ends of the two chains are fixedly connected to the lifting block; the two chains can be lifted, retracted and extended synchronously.

[0009] Preferably, two first support frames and two second support frames extending downward are fixedly installed at the bottom of the control module; the two first support frames are symmetrically arranged along the symmetry planes of the two pillars; the two second support frames are respectively located between the first support frames and the adjacent pillars, and the two second support frames are also symmetrically arranged; the bottom end of each chain extends from the bottom of the control module and is sequentially hung on the adjacent first support frame and the second support frame, and then fixedly connected to the lifting block.

[0010] Preferably, each of the chains is hung on the adjacent first support frame and the second support frame in an arc shape.

[0011] Preferably, sliders are fixedly mounted on both ends of the limiting rod, and the two sliders are slidably inserted in the two sliding grooves.

[0012] Furthermore, the crossbeam is provided with a first inner groove and a second inner groove which are arranged in a balanced manner along its length direction; the control module is provided with a first convex block and a second convex block correspondingly; the first convex block can be slidably extended into the first inner groove, and the second convex block can be slidably extended into the second inner groove; and the first convex block is provided with an internal threaded through hole, and the second convex block is provided with a sliding hole;

[0013] A first motor is fixedly installed at one end of the first inner groove, and a threaded rod is transmission-connected to the output end of the first motor. The threaded rod is placed in the first inner groove and penetrates and is screwed to the inner threaded through hole; a sliding roller is fixedly installed in the second inner groove, and the sliding roller is arranged parallel to the threaded rod, and the sliding roller can slide through the sliding hole;

[0014] The manipulation module can be driven by the first motor to reciprocate within the length range of the first inner groove and the second inner groove.

[0015] Preferably, the crossbeam is respectively recessed inwardly along two relative outsides of its length direction to form a first anti-derail groove and a second anti-derail groove; a through groove of a "concave"-shaped class is provided in the control module, and a first slider and a second slider are respectively provided on two relative inner side walls of the through groove; the crossbeam runs through the through groove, and the first slider is slidably embedded in the first anti-derail groove, and the second slider is slidably embedded in the second anti-derail groove; the control module can reciprocate within the length range of the first anti-derail groove and the second anti-derail groove.

[0016] Preferably, the crossbeam is in the shape of a rectangular parallelepiped, comprising two long arms and two short arms, with a hollow groove penetrating up and down formed in the middle thereof; the first inner groove and the first anti-derail groove are respectively arranged on two opposite surfaces of one of the long arms of the crossbeam; the second inner groove and the second anti-derail groove are respectively arranged on two opposite surfaces of the other long arm of the crossbeam; buffer grooves are respectively provided on the inner sides of the two relative short arms of the crossbeam, and buffer washers are provided on the surfaces of the buffer grooves.

[0017] Preferably, a second motor is fixedly installed inside the control module, and a rotating shaft is installed in the output end transmission of the second motor, and two main bevel gears are fixedly mounted on the rotating shaft; two winding rollers that are parallel to each other and arranged at intervals are also rotatably installed inside the control module, and the setting direction of the two winding rollers is perpendicular to the setting direction of the rotating shaft; each of the two winding rollers is fixedly mounted with a secondary bevel gear at one end close to the rotating shaft, and the two secondary bevel gears are respectively meshed and transmission-connected with the two main bevel gears; each of the two winding rollers winds up one of the chains, and the two winding rollers can rotate towards each other under the drive of the second motor to realize the synchronous winding, release and lifting of the two chains.

[0018] Preferably, the first support frame and the second support frame are both in the shape of an "H"-shaped suspension bar, and both are provided with a horizontally arranged cross bar for supporting the chain; and the horizontal position of the cross bar of the second support frame is lower than the cross bar of the first support frame.

[0019] The utility model provides a gantry crane, which has the following beneficial effects compared with the prior art: the gantry crane, through the mutual cooperation between the limit rod and the slide groove, and the chain hanging on two support frames to form an arc-shaped state with a certain tension, greatly reduces the deviation and swing of the hook during lifting and translation, avoiding affecting the safety of the crane. Secondly, the gantry crane can prevent the control module from derailing due to its own excessive weight by sliding and nesting the anti-derailment groove and the through groove in the control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the hook structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the internal structure of the beam of the utility model;

[0023] Figure 4 This is a schematic diagram of the control module structure of the utility model

[0024] Figure 5 It is a schematic diagram of the internal structure of the control module of the utility model.

[0025] Figure markings: 1-base; 2-pillar; 3-slide; 4-beam; 5-slider; 6-limit rod; 7-lifting block; 8-control module; 9-first support frame; 10-second support frame; 11-chain; 111-second motor; 112-main bevel gear; 113-rotating shaft; 114-secondary bevel gear; 115-winding roller; 12-spring; 13-hook; 14-first motor; 15-threaded rod; 16-first anti-derail groove; 17-slide roller; 18-second anti-derail groove; 19-buffer groove; 20-buffer plate; 21-slide hole; 22-first slider; 23-second slider; 24-inner threaded through hole; 25-through groove; 26-first inner groove; 27-second inner groove; 28-first protrusion; 29 second protrusion; 30-buffer washer; 41-long arm; 42-short arm. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-5 As shown, a gantry crane includes two vertically symmetrically arranged pillars 2, a base 1 is installed at the bottom of each pillar 2, and two auxiliary support columns are also installed on each base 1. The two auxiliary support columns are respectively located on both sides of the pillar 2, and the two auxiliary support columns and the base 1 together form a triangular bracket shape.

[0028] On one side of the two pillars 2 opposite to each other, a slide groove 3 is provided along the vertical direction thereof. A crossbeam 4 is connected and installed between the upper ends of the two pillars 2. A control module 8 is mounted on the crossbeam 4. The control module 8 can reciprocate horizontally along the length direction of the crossbeam 4.

[0029] Two retractable chains 11 are wound inside the control module 8, and the two chains 11 are symmetrically arranged along the symmetric planes of the two pillars 2. The bottom ends of the two chains 11 extend out of the bottom of the control module 8 and are fixedly connected to the top surface of the lifting block 7.

[0030] like Figure 5, the two chains 11 can be raised and lowered synchronously. A second motor 111 is fixedly installed inside the control module 8, and a rotating shaft 113 is installed at the output end of the second motor 111. Two main bevel gears 112 are fixedly mounted on the rotating shaft 113. Two winding rollers 115 are also rotatably installed inside the control module 8, which are parallel to each other and arranged at intervals. The setting direction of the two winding rollers 115 is perpendicular to the setting direction of the rotating shaft 113. A secondary bevel gear 114 is fixedly mounted on one end of the two winding rollers 115 close to the rotating shaft 113. The two secondary bevel gears 114 are respectively meshed and connected with the two main bevel gears 112, and the two secondary bevel gears 114 are located between the two main bevel gears 112. Each of the two winding rollers 115 reels one of the chains 11. Thereby, the two winding rollers 115 can be driven by the second motor 111 to rotate toward each other, so that the two chains 11 are synchronously reeled and raised.

[0031] A hook 13 is fixedly installed at the bottom of the lifting block 7. A limit rod 6 is slidably mounted inside the lifting block 7, and sliders 5 are fixedly installed at both ends of the limit rod 6. The two sliders 5 are slidably inserted in the two slide grooves 3. The lifting block 7 can be driven by the control module 8 to reciprocate along the slide groove 3 with the limit rod 6. The hook 13 can move synchronously with the lifting block 7, and can also move horizontally along the limit rod 6 with the lifting block 7.

[0032] Two first support frames 9 and two second support frames 10 extending downward are fixedly installed at the bottom of the control module 8. The two first support frames 9 are symmetrically arranged along the symmetry planes of the two pillars 2. The two second support frames 10 are respectively located between the first support frame 9 and the adjacent pillars 2, and the two second support frames 10 are also symmetrically arranged. The first support frame 9 and the second support frame 10 are both in the shape of an "H"-shaped suspension bar, and both are provided with a horizontally arranged cross bar for supporting the chain 11. The horizontal position of the cross bar of the second support frame 10 is lower than the cross bar of the first support frame 9. The bottom end of each chain 11 extends from the bottom of the control module 8 and is successively hung on the adjacent first support frame 9 and the second support frame 10, and then fixedly connected to the lifting block 7.

[0033] Each chain 11 is sequentially hung on the crossbar of the adjacent first support frame 9 and the crossbar of the second support frame 10, so that the chain 11 is hung in an arc shape. When the chain 11 is lifted and moved horizontally, it is supported by the tension of the first support frame 9 and the second support frame 10, thereby reducing the frequency of the chain 11 shaking.

[0034] like Figure 3-4 As shown, further, this embodiment further optimizes the structure of the connection between the crossbeam 4 and the control module 8:

[0035] Crossbeam 4 is cuboid, comprises two long arms 41 and two short arms 42, and its middle part forms the hollow groove that runs through up and down.The inside of one of the long arms 41 offers the first inner groove 26 along its length direction, and its relative outside is recessed along its length direction and is formed with the first anti-derail groove 16.The inside of another long arm 41 offers the second inner groove 27 along its length direction, and its relative outside is recessed along its length direction and is formed with the second anti-derail groove 18.The first anti-derail groove 16, the first inner groove 26, the second anti-derail groove 18 and the second inner groove 27 are all mutually balanced and arranged, and the length is about the same.

[0036] A first motor 14 is fixedly installed at one end of the first inner groove 26, and a threaded rod 15 is transmission-connected to the output end of the first motor 14. The threaded rod 15 is placed in the first inner groove 26. A sliding roller 17 is fixedly installed in the second inner groove 27, and the sliding roller 17 is arranged parallel to the threaded rod 15.

[0037] A through slot 25 of a concave shape is provided in the control module 8. The two opposite inner side walls of the through slot 25 are respectively provided with a first slide block 22 and a second slide block 23. Two long arms 41 of the crossbeam 4 run through the through slot 25. The first slide block 22 is slidably embedded in the first anti-derail groove 16, and the second slide block 23 is slidably embedded in the second anti-derail groove 18.

[0038] The inner side wall of the through groove 25 is also provided with a first protrusion 28 and a second protrusion 29 correspondingly. The first protrusion 28 is provided with an internal threaded through hole 24, and the second protrusion 29 is provided with a sliding hole 21. The first protrusion 28 extends into the first inner groove 26, and the threaded rod 15 passes through and is screwed with the internal threaded through hole 24. The second protrusion 29 can slidably extend into the second inner groove 27, and the sliding roller 17 can slidably pass through the sliding hole 21.

[0039] The control module 8 can be driven by the first motor 14 to move back and forth along the length direction of the crossbeam 4, thereby driving the hook 13 to move in the horizontal direction.

[0040] Furthermore, buffer grooves 19 are respectively provided on the inner sides of the two opposite short arms 42 of the cross beam 4 , and buffer washers 30 are provided on the surfaces of the buffer grooves 19 , which can effectively buffer the collision force between the control module 8 and the cross beam 4 when the control module 8 moves.

[0041] The main principle of the technical effect produced by this embodiment is: the two chains 11 are hung on the first support frame 9 and the second support frame 10 to form an arc line state with a certain tension, which plays a role in sharing the weight when the hook 13 pulls the heavy object; the limit rod 6 is engaged in the slide groove 3, which has a greater stabilizing effect on the stable state of the hook 13 during the lifting process, and the lifting and lowering can be limited by the limit rod 6 and the lifting block 7; thereby avoiding the hook 13 from swaying or deflecting in the lifting process due to inertia when lifting and transporting the heavy object, thereby reducing the risk during the crane transportation process and improving the safety of the equipment.

Claims

1. A gantry crane comprising two vertically symmetrically arranged pillars (2); characterized in that: The two pillars (2) are provided with a slide groove (3) on opposite sides along their own vertical direction; the upper ends of the two pillars (2) are connected and installed with a crossbeam (4); a control module (8) is mounted on the crossbeam (4), and the control module (8) can move back and forth horizontally along the length direction of the crossbeam (4); a chain (11) that can be rolled and retracted is rolled inside the control module (8), and the bottom end of the chain (11) extends out of the bottom of the control module (8) and is fixedly connected A lifting block (7) is connected; a hook (13) is fixedly installed at the bottom of the lifting block (7); a limit rod (6) is provided in a sliding sleeve inside the lifting block (7), and the limit rod (6) is horizontally arranged and its two ends are respectively inserted into the two slide grooves (3) for sliding connection; the lifting block (7) can be driven by the control module (8) and synchronously with the limit rod (6) to reciprocate and slide along the slide groove (3); the hook (13) can be synchronously lifted and moved with the lifting block (7).

2. A gantry crane according to claim 1, characterized in that: The control module (8) has two chains (11) wound inside; the two chains (11) are symmetrically arranged along the symmetry planes of the two pillars (2); and the bottom ends of the two chains (11) are fixedly connected to the lifting block (7); the two chains (11) can be raised, lowered, retracted and released synchronously.

3. A gantry crane according to claim 2, characterized in that: The bottom of the control module (8) is fixedly installed with two first support frames (9) and two second support frames (10) extending downward; the two first support frames (9) are symmetrically arranged along the symmetry planes of the two pillars (2); the two second support frames (10) are respectively located between the first support frames (9) and the adjacent pillars (2), and the two second support frames (10) are also symmetrically arranged; the bottom end of each chain (11) extends from the bottom of the control module (8) and is successively hung on the adjacent first support frames (9) and second support frames (10), and then fixedly connected to the lifting block (7).

4. A gantry crane according to claim 3, characterized in that: Each of the chains (11) is hung on the adjacent first support frame (9) and the second support frame (10) and is hung in an arc shape.

5. A gantry crane according to claim 1, characterized in that: Slide blocks (5) are fixedly mounted on both ends of the limiting rod (6), and the two slide blocks (5) are slidably inserted in the two slide grooves (3).

6. A gantry crane according to claim 1, characterized in that: The cross beam (4) is provided with a first inner groove (26) and a second inner groove (27) which are arranged in a balanced manner along its length direction; the control module (8) is provided with a first convex block (28) and a second convex block (29) correspondingly; the first convex block (28) can be slidably extended into the first inner groove (26), and the second convex block (29) can be slidably extended into the second inner groove (27); and the first convex block (28) is provided with an internal threaded through hole (24), and the second convex block (29) is provided with a sliding hole (21); A first motor (14) is fixedly mounted at one end of the first inner groove (26); a threaded rod (15) is transmission-connected to the output end of the first motor (14); the threaded rod (15) is placed in the first inner groove (26) and penetrates and is threadedly connected to the inner threaded through hole (24); a sliding roller (17) is fixedly mounted in the second inner groove (27); the sliding roller (17) is arranged parallel to the threaded rod (15), and the sliding roller (17) can slidably penetrate the sliding hole (21); The control module (8) can be driven by the first motor (14) to reciprocate within the length range of the first inner groove (26) and the second inner groove (27).

7. A gantry crane according to claim 6, characterized in that: The crossbeam (4) is respectively inwardly recessed along two opposite outer sides of its length direction to form a first anti-derail groove (16) and a second anti-derail groove (18); a through groove (25) of a concave shape is provided in the control module (8), and a first slider (22) and a second slider (23) are respectively provided on two opposite inner side walls of the through groove (25); the crossbeam (4) runs through the through groove (25), and the first slider (22) is slidably embedded in the first anti-derail groove (16), and the second slider (23) is slidably embedded in the second anti-derail groove (18); the control module (8) can reciprocate within the length range of the first anti-derail groove (16) and the second anti-derail groove (18).

8. A gantry crane according to claim 7, characterized in that: The cross beam (4) is in a rectangular parallelepiped shape, comprising two long arms (41) and two short arms (42), wherein a hollow groove running through the cross beam (4) is formed in the middle; the first inner groove (26) and the first anti-derail groove (16) are respectively arranged on two opposite surfaces of one of the long arms of the cross beam (4); the second inner groove (27) and the second anti-derail groove (18) are respectively arranged on two opposite surfaces of the other long arm of the cross beam (4); and buffer grooves (19) are respectively provided on the inner sides of the two opposite short arms of the cross beam (4), and the surfaces of the buffer grooves (19) are provided with buffer washers (30).

9. A gantry crane according to claim 2, characterized in that: A second motor (111) is fixedly installed inside the control module (8), and a rotating shaft (113) is transmission-installed on the output end of the second motor (111), and two main bevel gears (112) arranged at intervals are fixedly mounted on the rotating shaft (113); two winding rollers (115) which are parallel to each other and arranged at intervals are also rotationally installed inside the control module (8), and the arrangement direction of the two winding rollers (115) is perpendicular to the arrangement direction of the rotating shaft (113); one end of the two winding rollers (115) close to the rotating shaft (113) is fixedly mounted with a secondary bevel gear (114), and the two secondary bevel gears (114) are respectively meshed and transmission-connected with the two main bevel gears (112); each of the two winding rollers (115) winds up one of the chains (11), and the two winding rollers (115) can be driven by the second motor (111) to rotate towards each other, thereby realizing synchronous winding, unwinding and lifting of the two chains (11).

10. A gantry crane according to claim 3, characterized in that: The first support frame (9) and the second support frame (10) are both in the shape of an "H"-shaped suspension bar, and both are provided with a horizontally arranged cross bar for supporting the chain (11); and the horizontal position of the cross bar of the second support frame (10) is lower than the cross bar of the first support frame (9).

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