Lifting system and quayside container crane

Abstract

The invention provides a lifting system and a quayside container crane, the lifting system is used for driving a corresponding lifting appliance upper frame below a trolley of the quayside container crane to lift, and the lifting system comprises four hoisting mechanisms which are respectively arranged on four end parts of the trolley in the length direction and the width direction and are arranged in a rectangular shape in the same horizontal plane, each hoisting mechanism extends along the length direction of the trolley; the four groups of rope mechanisms are in one-to-one correspondence with the four hoisting mechanisms; wherein each group of rope mechanism comprises a first steel wire rope, a second steel wire rope, a first pulley and a second pulley, wherein the first steel wire rope and the second steel wire rope are oppositely arranged and output from the same side of the corresponding hoisting mechanism; and the first pulley and the second pulley are arranged on the lifting appliance upper frame. The lifting mechanism can stably drive the lifting appliance upper frame to ascend and descend.

Description

Technical Field

[0001] The present invention relates to the technical field of loading and unloading equipment, and in particular to a lifting system and a shore container crane. Background Art

[0002] The lifting system is an important part of the shore container crane. The lifting system controls the rise and fall of the spreader through the drive mechanism and the wire rope winding system connected to the drive mechanism, realizing the loading and unloading functions of the shore crane for containers. The load-carrying trolley is a form of the main trolley of the shore crane. Its lifting system is arranged on the trolley. The lifting system of the load-carrying trolley drives the horizontal parallel shaft reduction box through dual motors to control the rotation of the drum with wire rope wound around it, thereby controlling the rise and fall of the spreader.

[0003] The wire rope winding form of the lifting system of the load-carrying trolley is four-rope winding, that is, the four vertical and parallel wire ropes on the drum are wound around the pulley to lift the spreader. This winding method will cause the entire spreader system to shake due to external forces (such as strong winds) or inertia when the trolley is running during high-altitude operations, making it more difficult to align the spreader with the container, affecting the work efficiency of the entire machine. In order to adjust the spreader posture, the oil cylinder will be used to push and pull the pulley to adjust the center of gravity of the upper frame so that the upper frame drives the spreader to tilt, but the oil cylinder is heavy and occupies a large space, which will increase the size and weight of the trolley. Summary of the invention

[0004] In view of this, the present invention provides a lifting system, which can effectively reduce the shaking of the spreader and stably drive the spreader to tilt.

[0005] In order to solve at least one of the above technical problems, the present invention adopts the following technical solutions:

[0006] A first aspect of the present invention provides a lifting system for driving a corresponding lifting device under a trolley of a shore container crane to be lifted and lowered, comprising:

[0007] Four hoisting mechanisms are respectively arranged at the four ends of the trolley in the length direction and the width direction and are arranged in a rectangular shape in the same horizontal plane, and each hoisting mechanism extends along the length direction of the trolley;

[0008] Four sets of rope mechanisms correspond to four winch mechanisms one by one;

[0009] Each set of rope mechanisms includes a first steel wire rope and a second steel wire rope which are arranged opposite to each other and are discharged from the same side of a corresponding hoisting mechanism, and a first pulley and a second pulley which are arranged on the upper frame of the sling;

[0010] One end of each first steel wire rope is connected to the hoisting mechanism, and the other end is connected to the trolley by tilting upward after passing through the corresponding first pulley. The walking path of each first steel wire rope after it is unroped forms an inverted first plane triangle and is perpendicular to the length direction of the trolley.

[0011] One end of each second steel wire rope is connected to the winch mechanism, and the other end passes around the corresponding second pulley and then tilts upward to connect to the trolley. The walking path of each second steel wire rope after it comes out of the rope forms an inverted second plane triangle and is perpendicular to the width direction of the trolley.

[0012] In one embodiment of the present invention, each hoisting mechanism comprises:

[0013] A reel, which is used to be set on a trolley;

[0014] A driving member is connected to the reel and is used to drive the reel to rotate.

[0015] In one embodiment of the present invention, each hoisting mechanism further comprises:

[0016] A reduction box, the output end of which is coaxially connected to one end of the drum;

[0017] Coupling: The output end of the driving member is connected to the input end of the reduction box through the coupling.

[0018] In one embodiment of the present invention, the driving member is a servo motor, the reduction box is a planetary reduction box, the reduction box is arranged inside the reel and its input end extends outside the reel, and the coupling is an elastic coupling.

[0019] In one embodiment of the present invention, the trolley is provided with a seat bearing matched with one end of each reel away from the reduction box and a support matched with each reduction box.

[0020] In one embodiment of the present invention, each hoisting mechanism further comprises:

[0021] Brake: The brake is used to be arranged between the reduction box and the coupling to brake the winch mechanism.

[0022] In one embodiment of the present invention, the central axis of each second pulley is consistent with the width direction of the trolley;

[0023] The central axis of each first pulley is consistent with the length direction of the trolley.

[0024] In one embodiment of the present invention, the first plane triangles are staggered with each other in the length direction of the trolley, and the second plane triangles are staggered with each other in the width direction of the trolley.

[0025] In one embodiment of the present invention, each first steel wire rope is connected to the frame of the trolley via a first joint, and each second steel wire rope is connected to the frame of the trolley via a second joint;

[0026] The four second joints are symmetrically spaced along the center line of the width direction of the trolley and are located at two ends of the lower surface of the frame of the trolley along the width direction thereof;

[0027] The four first joints are symmetrically spaced along the center line of the length direction of the trolley and are located in the middle of the lower surface of the frame of the trolley.

[0028] A second aspect of the present invention provides a shore container crane, comprising a lifting system according to any one of the above embodiments.

[0029] The above technical solution of the present invention has at least one of the following beneficial effects:

[0030] According to the lifting system of the embodiment of the present invention, four hoisting mechanisms and four groups of rope mechanisms are provided, one end of the first steel wire rope of each rope mechanism is connected to the hoisting mechanism, and the other end is connected to the trolley by tilting upward after passing the first pulley corresponding thereto, and the walking path of each first steel wire rope after being released forms an inverted first plane triangle, which is perpendicular to the length direction of the trolley, one end of the second steel wire rope of each rope mechanism is connected to the hoisting mechanism, and the other end is connected to the trolley by tilting upward after passing the second pulley corresponding thereto, and the walking path of each second steel wire rope after being released forms an inverted second plane triangle, which is perpendicular to the width direction of the trolley. Thus, a plurality of plane triangles are formed, and the high stability of the triangles can effectively prevent the hoist from being put on the rack or the steel wire rope from shaking. In addition, the four hoisting mechanisms can rotate synchronously or asynchronously to realize the tilting of the hoist in three directions: front and back, left and right, and rotation, which takes up little space and effectively improves the flexibility and stability of the hoist. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A top view of a lifting system according to an embodiment of the present invention;

[0032] Figure 2 A front view of a lifting system according to an embodiment of the present invention;

[0033] Figure 3 A side view of a lifting system according to an embodiment of the present invention;

[0034] Figure 4 The figure is a schematic diagram of wire rope winding of a lifting system according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] 100, trolley; 101, hoisting device frame; 200, hoisting mechanism; 210, drum; 211, seat bearing; 220, driving member; 230, reduction gearbox; 231, support; 240, coupling; 250, brake; 310, first steel wire rope; 311, first joint; 320, second steel wire rope; 321, second joint; 330, first pulley; 340, second pulley. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0038] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0039] Firstly, the lifting system according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0040] like Figure 1-Figure 3As shown, the lifting system of the embodiment of the present invention can be used to drive the corresponding lifting device frame 101 below the trolley 100 of the shore container crane to rise and fall. The lifting system of the embodiment of the present invention may include: four hoisting mechanisms 200 and four sets of rope mechanisms. The four hoisting mechanisms 200 are respectively arranged at the four ends of the length direction and the width direction of the trolley 100 and are arranged in a rectangular shape in the same horizontal plane. Each hoisting mechanism 200 extends along the length direction of the trolley 100, and the four sets of rope mechanisms correspond to the four hoisting mechanisms 200 one by one. Among them, each group of rope mechanisms includes a first steel wire rope 310 and a second steel wire rope 320 which are arranged relatively to each other and come out from the same side of a corresponding hoisting mechanism 200, and a first pulley 330 and a second pulley 340 arranged on the sling upper frame 101; one end of each first steel wire rope 310 is connected to the hoisting mechanism 200, and the other end passes around the corresponding first pulley 330 and then tilts upward to connect to the trolley 100. The walking path of each first steel wire rope 310 after coming out forms an inverted first plane triangle, which is perpendicular to the length direction of the trolley 100; one end of each second steel wire rope 320 is connected to the hoisting mechanism 200, and the other end passes around the corresponding second pulley 340 and then tilts upward to connect to the trolley 100. The walking path of each second steel wire rope 320 after coming out forms an inverted second plane triangle, which is perpendicular to the width direction of the trolley 100. It should be noted that the first plane triangle is perpendicular to the length direction of the trolley 100, and the second plane triangle is perpendicular to the width direction of the trolley 100. Vertical here means approximately vertical, and there may be a certain angle (such as 0-5°, etc.). The length direction of the trolley 100 may be parallel to the length direction of the beam of the shore container crane, and the length direction of the trolley 100 and the length direction of the beam may both extend toward the sea side. The trolley 100 may reciprocate along the length direction of the beam, and the movement direction of the trolley of the shore container crane may be parallel to the width direction of the trolley 100.

[0041] In this embodiment, the length direction of the trolley 100 and the length direction of the beam both extend toward the sea side, and the trolley 100 can reciprocate along the length direction of the beam. By respectively arranging four hoisting mechanisms 200 and four sets of rope mechanisms at the four ends along the length direction and width direction of the trolley 100, one end of the first steel wire rope 310 of each rope mechanism is connected to the hoisting mechanism 200, and the other end passes through the corresponding first pulley 330 and then tilts upward to connect with the trolley 100. The walking path of each first steel wire rope 310 after it is released forms an inverted first plane triangle, which is perpendicular to the length direction of the trolley 100, thereby reducing the shaking of the sling in the length direction perpendicular to the trolley 100. At the same time, one end of the second steel wire rope 320 of each rope mechanism is connected to the hoisting mechanism 200, and the other end passes through the corresponding second pulley 340 and then tilts upward to connect with the trolley 100. The walking path of each second steel wire rope 320 after it is released forms an inverted second plane triangle, which is perpendicular to the width direction of the trolley 100. Therefore, the present invention forms two planar triangles by the steel wire rope in the width direction perpendicular to the trolley 100 and in the length direction perpendicular to the trolley 100, respectively, which can effectively prevent the sling frame 101 or the steel wire rope from shaking, reduce the shaking of the sling in the width direction and the length direction perpendicular to the trolley 100, and improve the stability of the sling.

[0042] In addition, by setting up four hoisting mechanisms 200, the four hoisting mechanisms 200 can rotate synchronously or asynchronously to achieve the tilting of the spreader in three directions: front and back, left and right, and rotation. Figure 1 and Figure 4For example, when the hoist needs to tilt forward, the two hoisting mechanisms 200 close to the sea side can release the corresponding first steel wire rope 310 and the second steel wire rope 320 to extend the corresponding first steel wire rope 310 and the second steel wire rope 320, and the two hoisting mechanisms 200 away from the sea side can retract the corresponding first steel wire rope 310 and the second steel wire rope 320 to shorten the corresponding first steel wire rope 310 and the second steel wire rope 320, thereby completing the forward tilting action of the hoisting device frame 101, and vice versa. When the sling needs to tilt to the right, the two hoisting mechanisms 200 on the right side of the length center line of the trolley 100 can release the corresponding first steel wire rope 310 and the second steel wire rope 320 to extend the corresponding first steel wire rope 310 and the second steel wire rope 320, and the two hoisting mechanisms 200 on the left side of the length center line of the trolley 100 can retract the corresponding first steel wire rope 310 and the second steel wire rope 320 to shorten the corresponding first steel wire rope 310 and the second steel wire rope 320, thereby completing the right tilting action of the sling upper frame 101, and vice versa. When the hoisting device needs to rotate counterclockwise, the hoisting mechanism 200 on the left side of the center line of the trolley 100 in the length direction away from the sea side and the hoisting mechanism 200 on the right side of the center line of the trolley 100 in the length direction close to the sea side can retract the corresponding first steel wire rope 310 and the second steel wire rope 320 to shorten the corresponding first steel wire rope 310 and the second steel wire rope 320, and the hoisting mechanism 200 on the left side of the center line of the trolley 100 in the length direction close to the sea side and the hoisting mechanism 200 on the right side of the center line of the trolley 100 in the length direction away from the sea side can release the corresponding first steel wire rope 310 and the second steel wire rope 320 to extend the corresponding first steel wire rope 310 and the second steel wire rope 320, thereby completing the counterclockwise rotation of the hoisting device frame 101, and vice versa. The present invention uses four hoisting mechanisms 200 to control the tilting of the spreader in three directions: front and back, left and right, and rotation. Compared with the method of using a cylinder to push, it occupies less space and effectively improves the flexibility and stability of the spreader frame 101.

[0043] In some other embodiments of the present invention, the inverted first plane triangle formed by the walking path after each of the first steel wire ropes 310 is unwound may have a certain inclination angle with the length direction of the trolley 100, that is, the first plane triangle is approximately perpendicular to the length direction of the trolley 100; the inverted second plane triangle formed by the walking path after each of the second steel wire ropes 320 is unwound may have a certain inclination angle with the length direction of the trolley 100, that is, the second plane triangle is approximately perpendicular to the length direction of the trolley 100. In this way, the adjacent first steel wire ropes 310 and second steel wire ropes 320 can be prevented from interfering with each other.

[0044] like Figure 2As shown, each hoisting mechanism 200 may include: a drum 210 and a driving member 220. The drum 210 is used to be arranged on the trolley 100 and wind the corresponding first wire rope 310 and second wire rope 320; the driving member 220 is connected to the drum 210 and is used to drive the drum 210 to rotate.

[0045] In this embodiment, the driving member 220 can release or retract the first steel wire rope 310 and the second steel wire rope 320 by driving the drum 210 to rotate forward or reverse, that is, the four drums 210 can rotate synchronously or asynchronously, thereby realizing the tilting of the sling in three directions: front and back, left and right, and rotation. Thus, the flexibility and stability of the sling frame 101 are effectively improved.

[0046] like Figure 2 As shown, each hoisting mechanism 200 further includes: a reduction box 230 and a coupling 240. The output end of the reduction box 230 is coaxially connected to one end of the drum 210, the reduction box 230 is arranged inside the drum 210 and its input end extends outside the drum 210, and the output end of the driving member 220 is connected to the input end of the reduction box 230 through the coupling 240. Specifically, the reduction box 230 may be a planetary reduction box, the driving member 220 may be a servo motor, and the coupling 240 may be an elastic coupling.

[0047] In this embodiment, the planetary reduction box has a compact structure and a small size, and can provide a higher output torque in a smaller space. At the same time, the planetary reduction box has multiple gear contact surfaces, so the transmitted load can be dispersed, and the carrying capacity and durability can be improved. The servo motor can accurately control the position, speed and torque, so as to accurately control the outgoing length and the retracted length of the first wire rope 310 or the second wire rope 320, and improve the accuracy of the sling upper frame 101 when tilting in the three directions of front and back, left and right, and rotation. In addition, by arranging an elastic coupling at the output end of the driving member 220 and the input end of the reduction box 230, the impact load can be effectively absorbed and buffered, the impact force generated when the reduction box 230 starts and stops can be reduced, and the accuracy of the drum 210 when rotating can be further improved.

[0048] like Figure 2 As shown, the trolley 100 is provided with a seat bearing 211 matched with one end of each reel 210 away from the reduction box 230 and a support 231 matched with each reduction box 230. Thus, the reel 210 and the reduction box 230 can be stably installed.

[0049] like Figure 2As shown, each hoisting mechanism 200 further includes a brake 250, which is arranged between the reduction box 230 and the coupling to brake the hoisting mechanism 200, for example, a disc brake can be used to brake the output shaft of the driving member 220. In this way, the drum 210 can be accurately controlled to stop, and the burden on the reduction box 230 can be reduced.

[0050] like Figure 1 As shown, the central axis of each second pulley 340 is consistent with the width direction of the trolley 100, and the central axis of each first pulley 330 is consistent with the length direction of the trolley 100. The first plane triangles are staggered in the length direction of the trolley 100, and the second plane triangles are staggered in the width direction of the trolley 100. In this way, the adjacent first steel wire ropes 310 and second steel wire ropes 320 can be prevented from interfering with each other.

[0051] like Figure 1 and Figure 4 As shown, each first steel wire rope 310 is connected to the frame of the trolley 100 via a first joint 311, and each second steel wire rope 320 is connected to the frame of the trolley 100 via a second joint 321. The four second joints 321 are symmetrically spaced along the center line of the width direction of the trolley 100, and the four first joints 311 are symmetrically spaced along the center line of the length direction of the trolley 100. The four first joints 311 can be located in the middle of the lower surface of the frame of the trolley 100, and the four second joints 321 can be located at both ends of the lower surface of the frame of the trolley 100 along its width direction. In this way, the stability of the sling frame 101 during lifting and lowering can be improved. Of course, in the actual setting, Figure 1 For reference, the four first joints 311 and the four second joints 321 may be staggered in the horizontal direction when arranged, so as to avoid interference between adjacent first steel wire ropes 310 or second steel wire ropes 320 .

[0052] A second aspect of the present invention provides a shore container crane, comprising a lifting system according to any one of the above embodiments.

[0053] In summary, according to the lifting system of the embodiment of the present invention, four hoisting mechanisms 200 and four groups of rope mechanisms are set, one end of the first steel wire rope 310 of each rope mechanism is connected to the hoisting mechanism 200, and the other end is connected to the trolley 100 after passing through the corresponding first pulley 330, and the walking path of each first steel wire rope 310 after the rope is released forms an inverted first plane triangle, which is perpendicular to the length direction of the trolley 100, and one end of the second steel wire rope 320 of each rope mechanism is connected to the hoisting mechanism 200, and the other end is connected to the trolley 100 after passing through the corresponding second pulley 340, and the walking path of each second steel wire rope 320 after the rope is released forms an inverted second plane triangle, which is perpendicular to the width direction of the trolley 100. Thus, multiple plane triangles are formed, and the high stability of the triangle can effectively prevent the sling rack 101 or the steel wire rope from shaking. In addition, the four hoisting mechanisms 200 can rotate synchronously or asynchronously to realize the tilting of the sling in three directions: front and back, left and right, and rotation, with small space occupation, and effectively improve the flexibility and stability of the sling.

[0054] Based on the above-mentioned embodiments of the present invention, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0055] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lifting system for driving the corresponding lifting device under the trolley of a shore container crane to rise and fall, characterized in that: include: Four hoisting mechanisms are respectively arranged at four ends of the trolley in the length direction and the width direction and arranged in a rectangular shape in the same horizontal plane, and each of the hoisting mechanisms extends along the length direction of the trolley; Four sets of rope mechanisms, corresponding one to one with the four hoisting mechanisms; Wherein, each group of the rope mechanisms comprises a first steel wire rope and a second steel wire rope which are arranged opposite to each other and are discharged from the same side of a corresponding one of the hoisting mechanisms, and a first pulley and a second pulley which are arranged on the upper frame of the sling; One end of each of the first steel wire ropes is connected to the hoisting mechanism, and the other end is connected to the trolley by tilting upward after passing through the first pulley corresponding to it, and the walking path of each of the first steel wire ropes after being unwound forms an inverted first plane triangle and is perpendicular to the length direction of the trolley; One end of each of the second steel wire ropes is connected to the hoisting mechanism, and the other end passes around the corresponding second pulley and then tilts upward to be connected to the trolley. The walking path of each of the second steel wire ropes after it is unroped forms an inverted second plane triangle and is perpendicular to the width direction of the trolley.

2. The lifting system according to claim 1, characterized in that: Each of the hoisting mechanisms comprises: A reel, the reel being used to be arranged on the trolley; A driving member is connected to the reel, and is used to drive the reel to rotate.

3. The lifting system according to claim 2, characterized in that: Each of the hoisting mechanisms also includes: A reduction box, wherein the output end of the reduction box is coaxially connected to one end of the reel; A coupling, wherein the output end of the driving member is connected to the input end of the reduction box through the coupling.

4. The lifting system according to claim 3, characterized in that: The driving member is a servo motor, the reduction box is a planetary reduction box, the reduction box is arranged inside the reel and its input end extends outside the reel, and the coupling is an elastic coupling.

5. The lifting system according to claim 4, characterized in that: The trolley is provided with a seat bearing matched with one end of each reel away from the reduction box and a support matched with each reduction box.

6. The lifting system according to claim 3, characterized in that: Each of the hoisting mechanisms also includes: A brake is used to be arranged between the reduction box and the coupling to brake the hoisting mechanism.

7. The lifting system according to claim 1, characterized in that: The central axis of each of the second pulleys is consistent with the width direction of the trolley; The central axis of each of the first pulleys is consistent with the length direction of the trolley.

8. The lifting system according to claim 1, characterized in that: The first plane triangles are staggered with each other in the length direction of the trolley, and the second plane triangles are staggered with each other in the width direction of the trolley.

9. The lifting system according to claim 8, characterized in that: Each of the first steel wire ropes is connected to the frame of the trolley via a first joint, and each of the second steel wire ropes is connected to the frame of the trolley via a second joint; The four second joints are symmetrically spaced along the center line of the width direction of the trolley and are located at two ends of the lower surface of the frame of the trolley along the width direction thereof; The four first joints are symmetrically spaced along the center line of the length direction of the trolley and are located in the middle of the lower surface of the frame of the trolley.

10. A shore container crane, characterized in that: Comprising a lifting system as claimed in any one of claims 1 to 9.

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