A container crane for port

Abstract

The present invention relates to the technical field of container lifting, and specifically discloses a container crane for a port, comprising a lifting platform, wherein hooks are arranged at four corners of the bottom of the lifting platform, and the hooks can move in forward, backward, left and right directions; two push plates that can move in left and right directions and two L-shaped plates that can move up and down are arranged on one side of the lifting platform; a first elastic member is installed between the push plates and the lifting platform, and a second elastic member that can move in up and down directions is installed between the L-shaped plates and the lifting platform; gears are installed on the surfaces opposite to each other in the front and back directions of the two L-shaped plates; a rack meshing with the gears is installed on the lifting platform, and a pushing component for pushing the gears to rotate is also installed on the L-shaped plates; the beneficial effects of the present invention are as follows: shaking of the lifting platform can be avoided during the lifting process, positioning operation can be performed from one side of the container, lifting operation can be performed when the containers are not densely packed, and the fixation between the hook and the container can be completed quickly.

Description

Technical Field

[0001] The invention relates to the technical field of container hoisting, and in particular to a container crane used in a port. Background Art

[0002] Containers are large cargo containers with certain strength, rigidity and specifications for turnover. When using containers to transport goods, you can load the goods directly at the shipper's warehouse and unload them at the consignee's warehouse. When changing vehicles or ships in the middle of the journey, there is no need to take the goods out of the container for reloading. It is suitable for freight storage, water transport ports and docks. Because it is a special equipment, it has the characteristics of high reliability, stable operation and high operating efficiency.

[0003] The container spreader in the prior art is generally as shown in the Chinese patent document with publication number CN111017703B, which discloses a container spreader and a crane, which relates to the technical field of engineering machinery, including a main beam, a first end beam and a second end beam; the first end beam is arranged at one end of the main beam, and the second end beam is arranged at the other end of the main beam; two first locks are arranged on the first end beam at intervals, and two second locks are arranged on the second end beam at intervals; the first end beam is hinged to the main beam so that the height of the two first locks on the first end beam is adjustable. When in use, because the first end beam is hinged to the main beam, the height of the two first locks on the first end beam in the vertical direction is adjusted by rotating the first end beam and the main beam, so that the two first locks of different heights cooperate with the two second locks, and can be aligned with the hook holes of the container that are not on the same plane, so as to achieve locking and unlocking, facilitate loading and unloading and lifting, and greatly improve work efficiency.

[0004] In the above technical solution, the hook hole of the container is matched with the lock to achieve the fixation between the hoist and the container. However, when carrying out hoisting operations at port terminals, strong winds are often encountered. When the operator operates the hoisting crane, it is difficult to align the lock with the hook hole on the container. In windy weather, the operator usually manually places the hoist in the hook hole for alignment, or sets a positioning fixture around the hoist to clamp the container around to complete the positioning of the hoist. Generally, the container is highly sealed when loading on the ship, and the gap between the containers is small. The positioning fixture needs to have a certain rotation space. This positioning fixture cannot be extended into the gap between the containers for positioning, and it is difficult for the operator to align the hook hole of the container with the hoist. Summary of the invention

[0005] The present invention provides a container crane for a port, aiming to solve the problem in the related art that a lifting device is difficult to match with a hook hole on a container in a windy condition.

[0006] A container crane for a port comprises a lifting platform, wherein hooks are arranged at the four corners of the bottom of the lifting platform, and the hooks can move in the front, back, left and right directions. Two push plates that can move in the left and right directions and two L-shaped plates that can move up and down are arranged on one side of the lifting platform. A first elastic member is installed between the push plate and the lifting platform, and a second elastic member that can move in the up and down directions is installed between the L-shaped plate and the lifting platform. Gears are installed on the surfaces opposite to each other in the front and back directions of the two L-shaped plates. A rack meshing with the gear is installed on the lifting platform, and a pushing component for pushing the gear to rotate is also installed on the L-shaped plate.

[0007] When the two L-shaped plates move away from each other, the pushing assembly contacts the lifting parts on the container and the movable end of the pushing assembly moves. When there is no relative displacement between the movable end of the pushing assembly and the L-shaped plate, the rack minimizes the distance between the L-shaped plate and the lifting platform, the first elastic member is compressed to the minimum distance, and the hook is restricted from moving in the front, back, left and right directions.

[0008] The beneficial effects of the present invention are: the positioning between the hook and the hook hole can be quickly completed in windy conditions to avoid the shaking of the lifting platform, and at the same time the fixation between the hook and the hook hole on the container can be completed from one side of the container, solving the problem of how to complete the positioning between the hook and the hook hole when the containers are relatively dense in the prior art.

[0009] Preferably, the pushing assembly includes a mounting cylinder fixedly connected to the gear, the mounting cylinder is rotatably set on an L-shaped plate, a push rod is slidably set on the L-shaped plate in the front-rear direction, a spiral groove is opened on the inner wall of the mounting cylinder, and a slider slidably set in the spiral groove is fixedly set on the push rod; the gear is rotated by the pushing assembly, so that the L-shaped plate and the push plate are brought closer to each other.

[0010] Preferably, a pressure plate is fixedly provided at the end of the push rod, and two guide shafts sliding on the L-shaped plate are fixedly provided on the pressure plate, and the guide shafts slide in the front-rear direction; the contact area with the lifting parts of the container is increased by the pressure plate, and the sliding of the push rod is guided by the guide shafts.

[0011] Preferably, the lifting platform includes an electric telescopic rod, the movable end of the electric telescopic rod can move in the front-to-back direction, the movable end of the electric telescopic rod is installed with an electric push rod, the movable end of the electric push rod can move in the left-to-right direction, and the hook is installed at the movable end of the electric push rod; by setting a drive to move the telescopic rod and the electric push rod, the hook can move in the front-to-back, left-to-right direction to adapt to containers of different sizes.

[0012] Preferably, two mounting plates are extended downwardly from one side of the lifting platform, and a first elastic member is installed on each mounting plate. A push plate is arranged at a movable end of the first elastic member, and the first elastic member includes a sleeve, and a movable rod is slidably arranged in the sleeve. A first spring is installed between the sleeve and the movable rod, and one end of the first spring is installed at the bottom of the sleeve, and the other end is connected to the movable rod. The push plate is installed on the movable rod; when the push plate contacts the container, the first elastic member can play a certain buffering role.

[0013] Preferably, a receiving groove adapted to the L-shaped plate is provided on the hanging platform, and the second elastic member is a second spring, one end of the second spring is connected to the bottom of the receiving groove, and the other end is connected to the L-shaped plate; when the hanging platform descends and the hook enters the hook hole, the second spring is compressed and the L-shaped plate enters the receiving groove.

[0014] Preferably, the mounting plate is provided with a slideway in the vertical direction, a slide plate is slidably arranged in the slideway, and the first elastic member is installed on the slide plate; when the lifting platform descends, the push plate abuts against the container, and the slide plate slides up along the slideway.

[0015] Preferably, a roller is provided on the side of the push plate close to the container; when the lifting platform moves left and right, the friction between the push plate and the container is reduced.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0017] 1. During the lifting operation, the operator moves the lifting platform toward the container so that the push plate contacts the container to initially reduce the shaking of the lifting platform caused by wind;

[0018] 2. The electric push rod is used to push the hook and the L-shaped plate to move synchronously. When the push rod contacts the hanging part, the push rod is pushed to move, and then the slider slides in the spiral groove. At this time, the installation cylinder rotates to drive the gear to rotate, and the gear rotation drives the rack to slide. The rack drives the installation plate and the L-shaped plate to move closer to each other, and the first elastic member is compressed. When the slider slides to the end of the spiral groove, the distance between the two push rods is fixed, and the hanging platform will not shake in the front and back directions. The first spring is compressed to the shortest distance, and one side of the L-shaped plate contacts the hanging part, and the hanging platform will not shake in the left and right directions.

[0019] 3. This solution is operated from one side of the container to complete the positioning between the hook and the container, and can be used for lifting operations when the containers are densely packed, avoiding the existing situation where the four-sided clamping claws cannot extend into the gaps between the containers to fix the container and the lifting platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the state of the lifting platform of the present invention when performing lifting operation.

[0021] Figure 2 It is a schematic diagram of the state structure of the pushing component of the present invention when it is not pushed.

[0022] Figure 3 It is a schematic structural diagram of the pushing component of the present invention in a state after being pushed.

[0023] Figure 4 It is a schematic diagram of the structure of the gear and rack matching of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the first elastic member of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the driving component of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the slider and the spiral groove of the present invention.

[0027] Figure numerals: 1. lifting platform; 11. electric telescopic rod; 12. electric push rod; 13. mounting plate; 14. slide; 15. slide plate; 2. lifting hook; 3. push plate; 4. L-shaped plate; 41. accommodating groove; 5. first elastic member; 51. sleeve; 52. movable rod; 53. first spring; 6. second elastic member; 71. gear; 72. rack; 8. pushing assembly; 81. mounting cylinder; 82. push rod; 83. spiral groove; 84. slider; 85. pressure plate; 86. guide shaft. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] like Figure 1-Figure 7 As shown, a container crane for a port comprises a lifting platform 1, a lifting hook 2 arranged at the four corners of the bottom of the lifting platform 1, a push plate 3, a first elastic member 5 connecting the push plate 3 and the lifting platform 1, an L-shaped plate 4, a second elastic member 6 connecting the L-shaped plate 4 and the lifting platform 1, a gear 71, a rack 72 and a pushing assembly 8. Lifting parts are arranged at the four corners of the container, and lifting holes cooperating with the lifting hook 2 are opened on the lifting parts.

[0030] The hanging platform 1 includes an electric telescopic rod 11, the movable end of which can move in the front-to-back direction. The movable end of the electric telescopic rod 11 is installed with an electric push rod 12, and the movable end of the electric push rod 12 can move in the left-to-right direction. The hook 2 is installed at the movable end of the electric push rod 12. The cooperation between the electric telescopic rod 11 and the electric push rod 12 can realize the movement of the hook 2 in the front-to-back, left-to-right directions. At the same time, the hanging platform 1 can be operated by an operator to move in the up-down, front-to-back, left-to-right directions.

[0031] In other embodiments of the present invention, if the containers are all standard containers with fixed sizes, the electric push rod 12 may not be provided, that is, only the electric telescopic rod 11 is required to enable the hook 2 to undergo relative displacement in the front and rear directions.

[0032] Two mounting plates 13 are extended downward from one side of the lifting platform 1, and a first elastic member 5 is mounted on each of the mounting plates 13. A push plate 3 is arranged at a movable end of the first elastic member 5. The first elastic member 5 includes a sleeve 51, and a movable rod 52 is slidably arranged in the sleeve 51. A first spring 53 is installed between the sleeve 51 and the movable rod 52. One end of the first spring 53 is mounted on the bottom of the sleeve 51, and the other end is connected to the movable rod 52. The push plate 3 is mounted on the movable rod 52. When the operator operates the lifting platform 1 to move, the push plate 3 is attached to the side of the container. At this time, the first spring 53 is compressed, and the lifting platform 1 has a supporting force for movement in the left and right directions, so that the shaking of the lifting platform 1 is controlled within a certain range.

[0033] During the lifting operation, the operator operates the lifting platform 1 to move from right to left. By setting the first elastic member 5, when the push plate 3 is attached to the container, it can play a certain buffering role to avoid a large impact force on the container when the push plate 3 contacts the container.

[0034] A receiving groove 41 adapted to the L-shaped plate 4 is provided on the lifting platform 1, and the second elastic member 6 is a second spring, one end of the second spring is connected to the bottom of the receiving groove 41, and the other end is connected to the L-shaped plate 4. When the upper and lower positions of the hook 2 and the hook hole of the container correspond, that is, the positions of the hook hole and the hook 2 correspond, the operator operates the lifting platform 1 to move downward to make the hook 2 enter the hook hole. At this time, the bottom of the L-shaped plate 4 is against the container, and the L-shaped plate 4 slides into the receiving groove 41 and compresses the second spring; when the hook is detached from the hook hole, the second spring stretches and causes the L-shaped plate 4 to slide downward from the receiving groove 41.

[0035] Gears 71 are installed on the surfaces of the two L-shaped plates 4 that are close to each other in the front-to-back direction. A rack 72 that meshes with the gear 71 is installed on the hanging platform 1. A pushing assembly 8 is installed on the L-shaped plate 4. The pushing assembly 8 includes a mounting cylinder 81 that is fixedly connected to the gear 71. The mounting cylinder 81 is rotatably set on the L-shaped plate 4. A push rod 82 is slidably set on the L-shaped plate 4 along the front-to-back direction. A spiral groove 83 is opened on the inner wall of the mounting cylinder 81. A slider 84 that slides in the spiral groove 83 is fixedly set on the push rod 82. When performing a hoisting operation, the electric telescopic rod 11 drives the hook 2 and the L-shaped plate 4 to move toward the hoisting member. When the push rod 82 abuts against the hoisting member, the hoisting member causes the push rod 82 to slide on the L-shaped plate 4, and the slider 84 slides in the spiral groove 83 to rotate the mounting cylinder 81. The rotation of the mounting cylinder 81 drives the gear 7 1 rotates, the gear 71 rotates to move the rack 72, and the rack 72 brings the mounting plate 13 and the L-shaped plate 4 closer to each other. When the slider 84 slides to one end of the spiral groove 83, the distance between the L-shaped plate 4 and the mounting plate 13 is the smallest, and the first spring 53 is compressed to the shortest distance. At this time, the position of the hook 2 is basically directly above the hook hole of the container. In this process, the operator needs to fine-tune the position of the lifting platform 1 to the right to ensure that the lifting platform 1 is basically horizontal, and then the operator operates the lifting platform 1 to descend, so that the hook 2 can enter the hook hole. When lifting the container, the positioning between the hook 2 and the hook hole can be completed from one side of the container, and there is no need to position the hook 2 from all sides of the container. When the containers are densely stacked, the hook 2 can also be accurately and quickly positioned.

[0036] In a preferred embodiment of the present invention, a pressure plate 85 is fixedly provided at the end of the push rod 82, and two guide shafts 86 sliding on the L-shaped plate 4 are fixedly provided on the pressure plate 85, and the guide shafts 86 slide along the front-to-back direction; by setting the pressure plate 85, even if the operator has a small displacement difference in the up and down directions when operating the lifting platform 1, it can be ensured that the pressure plate 85 can contact the lifting parts, and by setting the guide shafts 86, the push rod 82 can slide along the front-to-back direction of the L-shaped plate 4.

[0037] The mounting plate 13 is provided with a slideway 14 in the vertical direction, a slide plate 15 is slidably arranged in the slideway 14, and the first elastic member 5 is installed on the slide plate 15. When the operator operates the lifting platform 1 to descend, since the push plate 3 abuts against the side of the container, when the lifting platform 1 descends, the slide plate 15 slides upward along the slideway 14.

[0038] In a preferred embodiment of the present invention, a roller is provided on the side of the push plate 3 close to the container. When the electric telescopic rod 11 drives the mounting plate 13 to move in the front-rear direction, a left-right displacement can occur between the push plate 3 and the container, and the roller rolls to reduce the friction during the movement of the mounting plate.

[0039] Working principle of the present invention:

[0040] When performing the hoisting operation, the operator operates the lifting platform 1 to move toward the container, so that the push plate 3 abuts against the container to initially reduce the shaking of the lifting platform 1 caused by the wind, and then the electric push rod 12 is used to push the hook 2 and the L-shaped plate 4 to move synchronously. When the push rod 82 abuts against the lifting part, the push rod 82 is pushed to move, thereby causing the slider 84 to slide in the spiral groove 83. At this time, the installation cylinder 81 rotates to drive the gear 71 to rotate, and the gear 71 rotates to drive the rack 72 to slide. The rack 72 drives the installation plate 13 and the L-shaped plate 4 to approach each other, and the first elastic member 5 is compressed. When the slider 84 slides to the spiral groove 83 When the end of the lifting platform 1 is lowered, the distance between the two push rods 82 is fixed, the lifting platform 1 will not rock in the front-to-back direction, the first spring 53 is compressed to the shortest distance, one side of the L-shaped plate 4 abuts against the lifting member, and the lifting platform 1 will not rock in the left-to-right direction. At this time, the hook 2 is directly above the hook hole. The operator operates the lifting platform 1 to descend, so that the hook 2 is inserted into the hook hole, and the hook 2 and the container can be fixed in the windy condition. The present invention can complete the positioning of the hook 2 from one side of the container, thereby solving the problem that the hook 2 cannot be positioned from all sides of the container when the containers are densely packed.

[0041] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A container crane for use in a port, comprising a lifting platform (1), wherein four corners of the bottom of the lifting platform (1) are each provided with a lifting hook (2), and the lifting hook (2) can move in the forward, backward, left and right directions, and is characterized in that: Two push plates (3) movable in left-right directions and two L-shaped plates (4) movable in up-down directions are provided on one side of the hanging platform (1); a first elastic member (5) is installed between the push plates (3) and the hanging platform (1); a second elastic member (6) movable in up-down directions is installed between the L-shaped plates (4) and the hanging platform (1); gears (71) are installed on the surfaces of the two L-shaped plates (4) opposite to each other in the front-back direction; a rack (72) meshing with the gear (71) is installed on the hanging platform (1); and a pushing component (8) for pushing the gear (71) to rotate is also installed on the L-shaped plates (4); When the two L-shaped plates (4) move away from each other, the pushing assembly (8) contacts the lifting member on the container and the movable end of the pushing assembly (8) moves. When the movable end of the pushing assembly (8) and the L-shaped plate (4) no longer move relative to each other, the rack (72) minimizes the distance between the L-shaped plate (4) and the lifting platform (1), the first elastic member (5) is compressed to the minimum distance, and the movement of the hook (2) in the front, rear, left and right directions is restricted; The pushing assembly (8) comprises a mounting cylinder (81) fixedly connected to the gear (71); the mounting cylinder (81) is rotatably mounted on the L-shaped plate (4); a push rod (82) is slidably mounted on the L-shaped plate (4) in a front-rear direction; a spiral groove (83) is formed on the inner wall of the mounting cylinder (81); and a sliding block (84) is fixedly mounted on the pushing rod (82) and is slidably mounted in the spiral groove (83).

2. A container crane for a port according to claim 1, characterized in that: A pressing plate (85) is fixedly provided at the end of the push rod (82), and two guide shafts (86) sliding on the L-shaped plate (4) are fixedly provided on the pressing plate (85), and the guide shafts (86) slide in the front-rear direction.

3. A container crane for a port according to claim 1, characterized in that: The hanging platform (1) comprises an electric telescopic rod (11), the movable end of which can move in the front-rear direction, an electric push rod (12) is installed on the movable end of the electric telescopic rod (11), the movable end of which can move in the left-right direction, and a hanging hook (2) is installed on the movable end of the electric push rod (12).

4. A container crane for a port according to claim 1, characterized in that: Two mounting plates (13) are extended downward from one side of the hanging platform (1), and a first elastic member (5) is mounted on each mounting plate (13). The push plate (3) is arranged at a movable end of the first elastic member (5). The first elastic member (5) comprises a sleeve (51), and a movable rod (52) is slidably arranged in the sleeve (51). A first spring (53) is installed between the sleeve (51) and the movable rod (52), and one end of the first spring (53) is mounted on the bottom of the sleeve (51), and the other end is connected to the movable rod (52). The push plate (3) is mounted on the movable rod (52).

5. A container crane for a port according to claim 1, characterized in that: The hanging platform (1) is provided with a receiving groove (41) adapted to the L-shaped plate (4); the second elastic member (6) is a second spring, one end of the second spring is connected to the bottom of the receiving groove (41), and the other end is connected to the L-shaped plate (4).

6. A container crane for a port according to claim 4, characterized in that: The mounting plate (13) is provided with a slideway (14) in a vertical direction, a slide plate (15) is slidably arranged in the slideway (14), and the first elastic member (5) is mounted on the slide plate (15).

7. A container crane for a port according to any one of claims 1 to 6, characterized in that: The push plate (3) is provided with rollers on a side close to the container.

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