Container crane hoisting mechanism and steel wire rope head anti-rotation method
By connecting the anti-rotation stop bar with a flexible chain, the wear and noise problems of the wire rope end in the container crane lifting mechanism are solved, achieving a low-noise and low-wear anti-rotation effect for the wire rope.
Patent Information
- Application Number
- CN202511840654.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-08
- Publication Date
- 2026-02-03
AI Technical Summary
In container crane lifting mechanisms, the anti-rotation structure at the wire rope end is prone to wear and failure, and generates significant frictional noise. Conventional limit methods suffer from wear and breakage of the limit rod.
Two anti-rotation bars are connected by a flexible chain to limit their swing range, allowing the wire rope head to rotate within a certain angle to avoid friction and wear. At the same time, the mobility of the chain reduces the impact of tension.
It reduces noise and wear, extends the service life of chains and anti-rotation bars, and prevents internal stress changes caused by excessive twisting of the wire rope.
Smart Images
Figure CN121448941A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of hoisting and transporting equipment, and particularly relates to a container crane hoisting mechanism and a steel wire rope anti-retwisting method. BACKGROUND
[0002] The hoisting mechanism of the container crane is composed of a hoisting trolley and a hanger suspended below by steel wire ropes, and a winch (i.e. the winch drum and driving device in the application) and a pair of fixed pulleys are arranged on the hoisting trolley, and two pairs of movable pulleys are arranged on the hanger, one pair of the movable pulleys is arranged opposite to the pair of fixed pulleys, and the other pair of movable pulleys is arranged opposite to the winch drum, four steel wire ropes are wound on the winch drum, and the four steel wire ropes are connected to the four movable pulleys one by one, two of the steel wire ropes are connected to the movable pulleys after passing through the fixed pulleys, and the rope heads of the steel wire ropes are connected to the hoisting trolley after passing through the movable pulleys.
[0003] Since the hanger will sway during hoisting, the steel wire ropes will be twisted in an uncertain direction, and in order to avoid the increase of internal stress caused by the twisting of the steel wire ropes, the rope heads of the steel wire ropes are usually connected to the hoisting trolley in a movable manner, that is, the rope heads of the steel wire ropes can rotate with the twisting of the steel wire ropes, so that the repeated changes of internal stress caused by the twisting of the steel wire ropes can be avoided to affect the service life of the steel wire ropes.
[0004] However, the movable connection of the rope heads of the steel wire ropes to the hoisting trolley also needs to avoid the problem of steel wire rope retwisting, that is, the rope heads of the steel wire ropes cannot rotate unlimitedly, and the conventional solution to this problem is to connect the steel wire ropes to the hoisting trolley in a rotating manner through a hanger, then vertically connect a limiting plate to the hanger, the limiting plate is provided with a long hole or a long slot in the middle, a limiting rod is fixedly connected to the hoisting trolley and inserted into the long hole or long slot of the limiting plate, and the width of the long hole or long slot is greater than the width of the limiting rod, so that the hanger can rotate within a small angle range. However, this method has a defect that the limiting rod and the limiting plate are frequently rubbed, causing noise, and the limiting rod is also prone to wear and breakage, resulting in loss of limiting effect. SUMMARY
[0005] The technical problem to be solved by the application is to provide a container crane hoisting mechanism to solve the technical problems of easy wear and failure of the conventional container crane hoisting mechanism anti-rotation structure of the rope heads of the steel wire ropes and large friction noise.
[0006] To solve the above technical problems, the technical scheme adopted by the present application is: the container lifting mechanism, comprising a lifting trolley and a lifting frame located below the lifting trolley, four dynamic pulleys are rotatably connected to the four corners of the lifting frame, the four dynamic pulleys are arranged in a matrix, a winding drum and a pair of coaxially arranged fixed pulleys are rotatably connected to the lifting trolley, the winding drum is located above the two dynamic pulleys at the same end of the lifting frame, the pair of fixed pulleys are located directly above the two dynamic pulleys at the other end of the lifting frame, four lifting steel wires are wound on the winding drum, the winding mode of two of the steel wires is to pass through the two fixed pulleys one by one in correspondence, then pass through the pair of dynamic pulleys below the fixed pulleys and return to the lifting trolley; the winding mode of the other two steel wires is to pass through the pair of dynamic pulleys directly below the winding drum after winding from the winding drum and then return to the lifting trolley, each steel wire is connected to the lifting trolley through a connector, a driving device is connected to one side of the winding drum, the driving device is in transmission connection with the winding drum and drives the winding drum to rotate; any connector comprises a screw rod, a lifting ring is connected to the lower end of the screw rod, a horizontally arranged sensing shaft is connected in the lifting ring, a double-head pull ring is rotatably connected to the sensing shaft, one end of the double-head pull ring is rotatably connected to the sensing shaft, the other end is rotatably connected to a wedge joint, any steel wire is fixedly connected to the wedge joint of the corresponding connector, the screw rod is vertically connected to the lifting trolley and can rotate relative to the lifting trolley, a rotation preventing stop rod perpendicular to the screw rod is fixedly connected to the top of the lifting ring, a chain for limiting the rotation angle of the rotation preventing stop rod is connected to the rotation preventing stop rod, one end of the chain is connected to the rotation preventing stop rod, the other end is fixedly limited or movable within a certain range, and the swing amplitude of the rotation preventing stop rod limited by the chain is less than 180°.
[0007] As a preferred scheme, the other end of the chain is fixedly connected to the lifting trolley as a fixed end, the length of the chain is less than the distance from the fixed end of the chain to the screw rod, and the difference between the distance from the fixed end of the chain to the screw rod and the length of the chain is less than the length of the rotation preventing stop rod.
[0008] As a preferred scheme, the connectors above the two dynamic pulleys at the same end of the lifting frame are a pair of each other, the rotation preventing stop rods on the two connectors of the pair are connected to each other through a chain, the length of the chain is greater than the minimum distance between the two rotation preventing stop rods connected by the chain and less than the minimum distance between the rotation preventing stop rods on the screw rods.
[0009] As a preferred scheme, any dynamic pulley is connected to the lifting frame through a pulley seat, the pulley seat is rotatably connected to the lifting frame through a vertically arranged rotating shaft, and the dynamic pulley can rotate relative to the lifting frame.
[0010] As a preferred scheme, the lifting trolley is connected with through holes corresponding to the screw rods of the connectors, the screw rods are fixedly connected with nuts after passing through the through holes, the screw rods are gap-fitted with the through holes, and the screw rods are movably suspended on the lifting trolley through the nuts.
[0011] As a preferred solution, the winding drum is divided into four winding zones in an axial direction, each winding zone is separated by a circumferentially extending blocking ring, and four steel wire ropes are correspondingly wound on the four winding zones of the winding drum, wherein the steel wire ropes on the pair of moving pulleys directly below the winding drum are wound on the two middle winding zones of the winding drum, and the two steel wire ropes around the fixed pulleys are wound on the two winding zones at the two ends of the winding drum.
[0012] The further technical problem to be solved by the present application is to provide a steel wire rope head anti-rotation method to solve the technical problems of easy wear and failure of the conventional container crane hoisting mechanism steel wire rope head anti-rotation structure and large friction noise.
[0013] To solve the above technical problems, the technical solution adopted by the present application is: based on the steel wire rope head anti-rotation method of the container crane hoisting mechanism, the two steel wire rope heads at the same end of the hanger are rotatably connected to the lifting trolley by a connector, and then a chain is used to connect the anti-rotation stop rods on the two connectors at the same end of the hanger, and the swinging range of the two anti-rotation stop rods is mutually restrained by the chain, so that any connector can only rotate within a certain angle range.
[0014] The beneficial effects of the present application are: the flexible chain is used to limit the swinging range of the anti-rotation stop rod, eliminating the rigid friction and collision of the anti-rotation stop rod, which can reduce the noise generated during operation, and also reduce the wear speed of the chain. When a chain is used to connect the anti-rotation stop rods of two connectors at the same time, the two connectors are mutually restrained, and the two ends of the chain are in a movable state, so that when one end of the chain is pulled, the other end can compensate, reducing the tension on the chain and further reducing the wear speed between the chain and the anti-rotation stop rod. By connecting the chain to the two connectors at the same end of the hanger, the steel wire rope heads at the same end rotate in the same direction when the hanger shakes, so the two anti-rotation stop rods will not rotate in opposite directions, and the chain will not be pulled at the same time, avoiding the problem of extreme tension on the chain.
[0015] The connection structure of the chain connecting the two anti-rotation stop rods is simple and does not need to be welded, which is convenient to replace. BRIEF DESCRIPTION OF DRAWINGS
[0016] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which: Figure 1 is Figure 1 is a structural schematic diagram of the container crane hoisting mechanism according to the present application; Figure 2 is Figure 1 A-A sectional view of figure 1; Figure 3 is Figure 2 enlarged view of B part in figure 1; Figure 4is another chain connection structure schematic diagram described in the embodiment; Figure 5 is the connection structure schematic diagram of the movable pulley described in the application; Figure 6 is the top view of the lifting trolley described in the application; Figures 1-6 In: 1, lifting trolley; 2, hanging bracket; 3, movable pulley; 4, winding drum; 401, winding area; 402, check ring; 5, fixed pulley; 6, steel wire rope; 7, connector; 701, screw rod; 702, lifting ring; 703, sensing shaft; 704, double-headed pull ring; 705, wedge joint; 706, anti-rotation stop lever; 8, driving device; 9, chain; 10, pulley seat; 11, rotating shaft; 12, through hole; 13, nut. DETAILED DESCRIPTION
[0017] The specific embodiments of the application will be described in detail below with reference to the accompanying drawings.
[0018] As Figures 1-3 shown in the container lifting mechanism, including a lifting trolley 1 and a hanging bracket 2 located below the lifting trolley 1, four corners of the hanging bracket 2 are respectively rotatably connected with a movable pulley 3, the four movable pulleys 3 are arranged in a matrix, a winding drum 4 and a pair of coaxially arranged fixed pulleys 5 are rotatably connected to the lifting trolley 1, the winding drum 4 is located above the two movable pulleys 3 at the same end of the hanging bracket 2, and the pair of fixed pulleys 5 are located directly above the two movable pulleys 3 at the other end of the hanging bracket 2, four lifting steel wire ropes 6 are wound on the winding drum 4, and the winding mode of two steel wire ropes 6 is to pass through the two fixed pulleys 5 one by one in correspondence, then pass through a pair of movable pulleys 3 below the fixed pulleys 5 and return to the lifting trolley 1; the winding mode of the other two steel wire ropes 6 is to pass through a pair of movable pulleys 3 directly below the winding drum 4 after winding downward from the winding drum 4 and then return to the lifting trolley 1, each steel wire rope 6 is connected with the lifting trolley 1 through a connector 7, and a driving device 8 is connected to one side of the winding drum 4, the driving device 8 is in driving connection with the winding drum 4 and drives the winding drum 4 to rotate.
[0019] As Figure 3As shown, any of the connectors 7 comprises a screw rod 701, the lower end of the screw rod 701 is connected with a lifting ring 702, the lifting ring 702 is connected with a horizontally arranged sensing shaft 703, the sensing shaft 703 is used for detecting the tension of the steel wire rope, one end of the sensing shaft 703 is connected with a signal line to a controller on the lifting trolley. A double-head pull ring 704 is rotatably connected to the sensing shaft 703, one end of the double-head pull ring 704 is rotatably connected with the sensing shaft 703, and the other end is rotatably connected with a wedge joint 705, any steel wire rope 6 is fixedly connected with the wedge joint 705 of the corresponding connector 7, the screw rod 701 is vertically connected to the lifting trolley 1 and can rotate relative to the lifting trolley 1, the top of the lifting ring 702 is fixedly connected with an anti-rotation stop bar 706 perpendicular to the screw rod 701, the anti-rotation stop bar 706 is connected with a chain 9 for limiting the rotation angle thereof, one end of the chain 9 is connected with the anti-rotation stop bar 706, and the other end is fixedly limited or movable within a certain range, the swing amplitude of the chain limiting the anti-rotation stop bar 706 is less than 180°.
[0020] As shown in Figure 2 , the connectors 7 above the two movable pulleys 3 at the same end of the hanger 2 are a pair of each other, the anti-rotation stop bars 706 on the pair of two connectors 7 are connected with each other through a chain 9, when connected, the anti-rotation stop bars 706 on the pair of two connectors 7 are oppositely arranged, the chain 9 is connected between the two anti-rotation stop bars 706 in a relaxed state, and the two ends of the chain 9 are connected with the corresponding anti-rotation stop bars 706 through detachable ring buckles to facilitate disassembly and replacement. The length of the chain 9 is greater than the minimum distance between the two anti-rotation stop bars 706 connected thereby and less than the minimum distance between the anti-rotation stop bar 706 on one screw rod 701 and the anti-rotation stop bar 706 on the other screw rod 701, so as to ensure that the swing amplitude of any anti-rotation stop bar 706 does not exceed 180°.
[0021] Avoiding the anti-rotation stop bar 706 from rotating beyond the range can limit the rotation of the screw rod 701 and the rope head, which can prevent the steel wire rope from being over-retwisted to cause loosening or over-twisted to cause excessive internal stress, and can also avoid the signal line of the sensing shaft 703 from being excessively wound to break.
[0022] As an alternative, as shown in Figure 4 , the other end of the chain 9 can also be fixedly connected to the lifting trolley 1 as a fixed end, the length of the chain 9 is less than the distance from the fixed end of the chain 9 to the screw rod 701, and the difference between the distance from the fixed end of the chain 9 to the screw rod 701 and the length of the chain 9 is less than the length of the anti-rotation stop bar 706.
[0023] Unlike the connection structure shown in Figure 2 , the anti-rotation stop bar 706 is connected with the chain 9 through a lifting ring 702, the lifting ring 702 is connected with the chain 9 through a lifting ring 702, and the lifting ring 702 is connected with the chain 9 through a lifting ring 702. Figure 4The chain 9 is positioned by a single-point fixed connection, which can also prevent the excessive rotation of the wire rope head and provide the wire rope head with good swing freedom, but the chain 9 fixed at one end will still be subjected to a large impact force during the swing of the anti-rotation stopper 706, but can effectively reduce the friction noise during the swing of the anti-rotation stopper 706.
[0024] As shown in Figure 5 Any movable pulley 3 is connected with the hanger 2 through a pulley seat 10, the pulley seat 10 is rotationally connected with the hanger 2 through a vertical rotation shaft 11, and the movable pulley 3 can rotate relative to the hanger 2; when the hanger 2 swings, the movable pulley 3 can swing in the opposite direction to avoid the steel wire rope 6 from being clamped.
[0025] As shown in Figure 2 The lifting trolley 1 is connected with a through hole 12 corresponding to the screw rod 701 of the connector 7, the screw rod 701 is fixedly connected with a nut 13 after passing through the through hole 12, the screw rod 701 is in clearance fit with the through hole 12, and the screw rod 701 is movably suspended on the lifting trolley 1 through the nut 13, so as to ensure the connection reliability of the connector 7 and the lifting trolley 1 and the activity ability of the connector 7.
[0026] As shown in Figure 6 The winding drum 4 is axially divided into four winding areas 401, each winding area 401 is isolated by a circumferentially extending blocking ring 402, and four steel wire ropes 6 are correspondingly wound on the four winding areas 401 of the winding drum 4. The steel wire ropes 6 on the pair of movable pulleys 3 located directly below the winding drum 4 are wound on the two middle winding areas 401 of the winding drum 4, and the two steel wire ropes 6 passing through the fixed pulley 5 are wound on the two winding areas 401 at the two ends of the winding drum 4.
[0027] The steel wire rope head anti-rotation method of the container lifting mechanism is as follows: the wire heads of the two steel wire ropes 6 at the same end of the hanger 2 are rotationally connected with the lifting trolley 1 through the connector 7, then a chain 9 is used to connect the anti-rotation stoppers 706 on the two connectors 7 at the same end of the hanger 2, the swing ranges of the two anti-rotation stoppers 706 are mutually restrained by the chain 9, and any connector 7 can only rotate within a certain angle range. In this way, the friction noise generated during the rotation of the anti-rotation stopper 706 is eliminated, the wear of the chain 9 is reduced, and the service life of the chain 9 is prolonged. Moreover, the chain 9 is more convenient to assemble and disassemble.
[0028] The above embodiments only exemplarily illustrate the principles and effects of the present application and some applied embodiments, and are not used to limit the present application; it should be noted that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.
Claims
1. A container crane lifting mechanism, comprising a lifting trolley (1) and a gantry (2) located below the lifting trolley (1). A movable pulley (3) is rotatably connected to each of the four corners of the gantry (2), and the four movable pulleys (3) are arranged in a matrix. A drum (4) and a pair of coaxially arranged fixed pulleys (5) are rotatably connected to the lifting trolley (1). The drum (4) is located above the two movable pulleys (3) at the same end of the gantry (2), and the pair of fixed pulleys (5) are located directly above the two movable pulleys (3) at the other end of the gantry (2). Four lifting wire ropes (6) are wound on the drum (4), two of which... The winding method of the first wire rope (6) is to first pass around the two fixed pulleys (5) one by one, and then pass around the pair of movable pulleys (3) below the fixed pulleys (5) before returning to the hoisting trolley (1); the winding method of the other two wire ropes (6) is to pass directly down from the drum (4) around the pair of movable pulleys (3) directly below the drum (4) before returning to the hoisting trolley (1). Each wire rope (6) is connected to the hoisting trolley (1) through a connector (7). A drive device (8) is connected to one side of the drum (4). The drive device (8) is connected to the drum (4) and drives the drum (4) to rotate. Its features are, Each of the connectors (7) includes a screw (701), with a lifting ring (702) connected to the lower end of the screw (701). A horizontally arranged sensing shaft (703) is connected inside the lifting ring (702). A double-headed pull ring (704) is rotatably connected to the sensing shaft (703). One end of the double-headed pull ring (704) is rotatably connected to the sensing shaft (703), and the other end is rotatably connected to a wedge-shaped connector (705). Any wire rope (6) is fixed to the wedge-shaped connector (705) of the corresponding connector (7). The screw (701) is vertically connected to the hoisting trolley (1) and can rotate relative to the hoisting trolley (1). The top of the lifting ring (702) is fixedly connected to an anti-rotation stop bar (706) perpendicular to the screw (701). A chain (9) is connected to the anti-rotation stop bar (706) to limit its rotation angle. One end of the chain (9) is connected to the anti-rotation stop bar (706), and the other end is restricted to be fixed or move within a specific range. The chain limits the swing amplitude of the anti-rotation stop bar (706) to less than 180°.
2. The container lifting mechanism according to claim 1, characterized in that, The other end of the chain (9) is fixedly connected to the hoisting trolley (1) as a fixed end. The length of the chain (9) is less than the distance from the fixed end of the chain (9) to the screw (701). The difference between the distance from the fixed end of the chain (9) to the screw (701) and the length of the chain (9) is less than the length of the anti-rotation stop (706).
3. The container lifting mechanism according to claim 1, characterized in that, The connectors (7) above the two movable pulleys (3) at the same end of the hanger (2) are a pair. The anti-rotation bars (706) on the two connectors (7) are connected to each other by a chain (9). The length of the chain (9) is greater than the minimum distance between the two anti-rotation bars (706) it connects and less than the minimum distance between the anti-rotation bars (706) on one screw (701) and the other screw (701).
4. The container lifting mechanism according to claim 1, characterized in that, Any movable pulley (3) is connected to the hanger (2) through a pulley seat (10). The pulley seat (10) is rotatably connected to the hanger (2) through a vertically set pivot (11). The movable pulley (3) can rotate relative to the hanger (2).
5. The container lifting mechanism according to claim 1, characterized in that, The lifting trolley (1) is connected to through holes (12) that correspond one-to-one with the screws (701) of the connector (7). After the screws (701) pass through the through holes (12), they are fixedly connected to the nuts (13). The screws (701) and the through holes (12) are in clearance fit. The screws (701) are movably suspended on the lifting trolley (1) through the nuts (13).
6. The container lifting mechanism according to claim 1, characterized in that, The drum (4) is divided into four winding areas (401) along the axial direction. Each winding area (401) is separated by a circumferentially extending retaining ring (402). Four steel wire ropes (6) are wound around the four winding areas (401) of the drum (4) in a corresponding manner. Among them, the steel wire rope (6) on a pair of movable pulleys (3) located directly below the drum (4) is wound around the two winding areas (401) in the middle of the drum (4), and the two steel wire ropes (6) that pass around the fixed pulley (5) are wound around the two winding areas (401) at both ends of the drum (4).
7. A method for preventing the wire rope end from rotating based on the container lifting mechanism according to any one of claims 1 to 6, characterized in that, The ends of the two steel wire ropes (6) at the same end of the gantry (2) are connected to the hoisting trolley (1) by a connector (7). Then, a chain (9) is used to connect the anti-rotation bars (706) on the two connectors (7) at the same end of the gantry (2). The chain (9) is used to restrain the swing range of the two anti-rotation bars (706) so that either connector (7) can only rotate within a certain angle range.