Ship deck single rope double-lift hoist mobile winch

Abstract

This invention discloses a single-rope double-lifting mobile winch for ship decks, belonging to the technical field of ship deck lifting equipment. It includes a frame, a lifting mechanism, a power mechanism, and a drive mechanism. The lifting mechanism includes a drum horizontally mounted above the frame and capable of being driven to rotate. A rope is wound on the drum, with both ends wound in the same direction from both ends of the drum towards the middle. The middle of the rope hangs down and passes over a fixed pulley mounted below the frame. A lifting device is installed between the drum and the fixed pulley, with two sets of movable pulleys resting on two ropes extending from the fixed pulley. This winch achieves double-point lifting of the lifting device with only one rope, as the two sets of movable pulleys are distributed to the two sets of movable pulleys of the lifting device via a single rope wound in the same direction at both ends to the middle of the drum, and then distributed to the two sets of movable pulleys of the lifting device via the fixed pulley. The two sets of movable pulleys are simultaneously stressed, avoiding transmission efficiency deviations and lifting device imbalance caused by wear differences in multiple ropes.

Description

Technical Field

[0001] This invention relates to the field of ship deck lifting equipment technology, specifically a ship deck single-rope double-lifting mobile winch. Background Technology

[0002] In ship operations, winches are the core equipment for lifting, traction, or securing heavy objects. Traditional ship winches, to improve the stability of lifting and securing loads, typically employ a scheme where multiple wire ropes (2-3 ropes) act simultaneously on the load sheave of the load-bearing device. This means that multiple ropes share the load, distributing the stress across a single rope. However, after long-term use, this scheme has revealed the following problems: Wear differences lead to transmission imbalance: During repeated winding and friction, multiple ropes wear at different rates due to factors such as installation tension, contact angle, drum and pulley surface condition. When the wear of a certain rope is significantly greater than that of other ropes, the friction between it and the moving pulley and the transmission efficiency will decrease, resulting in uneven distribution of tension on the lifting device by each rope. This can cause the lifting device to tilt, sway or even lose control, seriously affecting the safety of the operation. High maintenance complexity: The multi-rope system requires regular inspection of the wear condition of each rope, and if a rope needs to be replaced, the tension and position of the remaining ropes must be adjusted simultaneously to ensure balance. The maintenance process is cumbersome and time-consuming, which increases the cost of ship operation and maintenance. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a ship deck single-rope double-lifting mobile winch. Through the innovative structure of "single rope with both ends wound in the same direction + diverting the flow to double moving pulleys through a fixed pulley in the middle", only one rope is needed to achieve double-point lifting of the lifting device, avoiding the stability problem caused by the wear difference of multiple ropes, and simplifying the maintenance process.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A ship deck single-rope double-lifting mobile winch includes a frame, a lifting mechanism installed below the frame, a power mechanism installed above the frame, and a drive mechanism installed below the frame. Its core improvement lies in the following: The lifting mechanism includes a drum that is horizontally installed above the frame and can be driven to rotate. A rope is wound on the drum, with both ends of the rope wound in the same direction from both ends of the drum towards the middle of the drum. The middle of the rope hangs down and passes around a fixed pulley installed below the frame. A lifting device is installed between the drum and the fixed pulley. The two sets of movable pulleys of the lifting device rest on two ropes led out from the fixed pulley.

[0005] By adopting the above solution, the winch winds the two ends of a single rope in the same direction to the middle of the drum, and then distributes the force to the two sets of movable pulleys of the lifting device through a fixed pulley. Only one rope is needed to achieve dual-point lifting of the lifting device, and the two sets of movable pulleys are subjected to force synchronously, avoiding transmission efficiency deviation and lifting device imbalance caused by wear differences in multiple ropes. At the same time, the structure is simpler, requiring maintenance of only one rope, which greatly reduces maintenance difficulty and cost.

[0006] As a preferred embodiment of a ship deck single-rope double-lift lifting mobile winch, the surface of the drum is provided with a winding groove for rope limiting. The winding groove radially limits the rope, preventing lateral deviation or jumping out of the groove during winding, ensuring that the rope at both ends is always wound evenly along a fixed trajectory, avoiding local accumulation or slack, and further improving winding stability and rope life.

[0007] As a preferred embodiment of a ship deck single-rope double-lifting mobile winch, the two ends of the rope have equal winding lengths at both ends of the drum body, ensuring balanced tension at both ends of the rope and keeping the rope in a natural vertical state in the middle drooping section. This avoids rope tilting or uneven loading caused by differences in winding lengths at both ends, further ensuring symmetrical lifting force at both points of the lifting device and enhancing lifting stability.

[0008] As a preferred embodiment of a ship deck single-rope double-lifting mobile winch, the lower half of the two sets of movable pulleys is concealed within the lifting device. This concealment protects the movable pulleys from direct corrosion by deck debris (such as water, oil, and debris), extending the service life of the pulley bearings and wheel bodies. The upper half of the two sets of movable pulleys is exposed outside the lifting device, facilitating direct contact with the ropes extending from the fixed pulleys, ensuring smooth transmission, and simplifying the structural design of the lifting device.

[0009] As a preferred embodiment of a ship deck single-rope double-lifting mobile winch, the power mechanism includes a power motor mounted on the frame, with a coupling coaxially connected to the shaft of the power motor. The coupling is connected to the drum drive through a reducer. The power motor provides rotational power, which is transmitted to the drum through the coupling and the reducer (reducing the speed and increasing the torque), achieving precise low-speed, high-torque winding to meet the power requirements for lifting heavy objects. At the same time, the motor drive facilitates automated control.

[0010] As a preferred embodiment of a ship deck single-rope double-lifting mobile winch, the drive mechanism includes a main drive assembly at the front and a driven drive assembly at the rear. Through the cooperation of the front and rear wheel sets, the winch can move smoothly on the ship deck track, such as adjusting the lifting position. The drive wheel provides driving force, and the driven wheel provides auxiliary support, ensuring the flexibility of equipment movement and the accuracy of positioning.

[0011] As a preferred embodiment of a ship deck single-rope double-lifting mobile winch, the main drive assembly includes a transversely arranged main drive rod, with drive wheels coaxially connected to both ends of the main drive rod. The two sets of drive wheels are respectively mounted below the frame via front wheel seats. The main drive assembly also includes a drive motor mounted above the frame. The drive motor is connected to the main drive rod via a reducer. The drive motor drives the main drive rod to rotate via the reducer (further reducing the speed and increasing the torque), thereby driving the drive wheels at both ends to rotate synchronously, realizing the linear movement of the winch.

[0012] As a preferred embodiment of a ship deck single-rope double-lifting mobile winch, the drive assembly includes a transversely arranged driven rod, with driven wheels coaxially connected to both ends of the driven rod. The two sets of driven wheels are respectively mounted below the frame through rear wheel seats. The driven wheels move synchronously with the drive wheel, providing additional support force, distributing the overall weight of the winch, preventing rollover or track damage caused by center of gravity shift during movement, and enhancing movement stability.

[0013] As a preferred embodiment of a ship deck single-rope double-lifting mobile winch, both reducer one and reducer two are two-stage reducers. The two-stage reduction design significantly reduces the output speed and greatly increases the output torque through the step-by-step transmission of the small gear driving the large gear, meeting the low-speed, high-load requirements for lifting heavy objects and moving equipment. The two-stage reducer includes a housing, within which a first reduction shaft, a second reduction shaft, and a third reduction shaft are rotatably mounted sequentially. The first and second reduction shafts are respectively coaxially mounted with a first-stage driving gear and a first-stage driven gear that mesh with each other, wherein the diameter of the first-stage driving gear is smaller than the diameter of the first-stage driven gear. The second and third reduction shafts are respectively coaxially mounted with a second-stage driving gear and a second-stage driven gear that mesh with each other, wherein the diameter of the second-stage driving gear is smaller than the diameters of both the first-stage and second-stage driven gears. The reasonable diameter ratio of the above gear pairs can further optimize the transmission ratio and improve the transmission efficiency.

[0014] The beneficial effects of this invention are: 1. High stability: The single rope is diverted to the double moving pulley through the fixed pulley, which avoids the transmission efficiency deviation and lifting equipment imbalance caused by the wear difference of multiple ropes, and the lifting process is more stable; 2. Easy maintenance: Only one rope needs to be maintained, eliminating the need to check the wear condition of multiple ropes one by one, thus reducing maintenance costs and time; 3. Compact structure: The single-rope double-lifting design reduces the number of ropes and the complexity of the pulley system, resulting in a smaller equipment size, making it suitable for scenarios with limited ship deck space; 4. High-efficiency transmission: The two-stage reducer optimizes the power transmission ratio, ensuring high torque output at low speeds to meet the needs of heavy-duty lifting; the winding groove and the equal length design at both ends improve the uniformity of rope winding. 5. Flexible movement: The cooperation between the master and slave drive assemblies enables precise movement and positioning of the winch, while the driven wheel auxiliary support enhances movement stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 Three-dimensional lifting of mobile hoist with single rope double jack on ship deck Figure 1 ; Figure 2 Three-dimensional lifting of mobile hoist with single rope double jack on ship deck Figure 2 ; Figure 3 This is a 3D view of the lifting mechanism; Figure 4 This is the front view of the lifting mechanism; Figure 5 This is a right view of the lifting mechanism; Figure 6 This is a three-dimensional view of the power mechanism; Figure 7 A 3D view of the main drive mechanism; Figure 8 A three-dimensional view of the drive mechanism; Figure 9 This is a diagram of the internal structure of a two-stage speed reducer.

[0017] The markings in the diagram are: 1-Frame; 2-Lifting mechanism; 21-Drum; 22-Rope; 23-Fixed pulley; 24-Lifting device; 25-Moving pulley; 26-Rewinding trough; 3-Power mechanism; 31-Power motor; 32-Coupling; 33-Reducer 1; 4-Main drive mechanism; 41-Drive motor; 42-Reducer 2; 43-Main transmission rod; 44-Driving wheel; 45-Front wheel seat; 5-Driven drive mechanism; 51-Driven transmission rod; 52-Driven wheel; 53-Rear wheel seat; 6-Housing; 7-First reduction shaft; 7-Second reduction shaft; 8-Third reduction shaft; 9-First stage driving gear; 10-First stage driven gear; 11-Second stage driving gear; 12-Second stage driven gear. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 2 As shown, a ship deck single-rope double-lifting mobile winch is used for lifting and lowering heavy objects such as cargo on the ship deck. Specifically, it includes a frame 1, a lifting mechanism 2 installed below the frame 1, a power mechanism 3 installed above the frame 1, and a drive mechanism installed below the frame 1.

[0020] like Figures 3 to 5 As shown, the lifting mechanism 2 includes a drum 21 that is horizontally installed above the frame 1 and can be driven to rotate. A rope 22 is wound on the drum 21. The two ends of the rope 22 are wound in the same direction from the two ends of the drum body to the middle of the drum body. The middle part of the rope 22 hangs down and passes around a fixed pulley 23 installed below the frame 1. A lifting device 24 is installed between the drum 21 and the fixed pulley 23. The two sets of movable pulleys 25 of the lifting device 24 are placed on the two strands of rope 22 that are led out from the fixed pulley 23. The winch winds the two ends of a single rope 22 in the same direction to the middle of the drum 21, and then distributes the force through a fixed pulley 23 to two sets of movable pulleys 25 on the lifting device 24. Only one rope 22 is needed to achieve dual-point lifting of the lifting device 24. The two sets of movable pulleys 25 are subjected to force synchronously, avoiding transmission efficiency deviations and lifting device 24 imbalance problems caused by wear differences in multiple ropes 22. At the same time, the structure is simpler, requiring maintenance of only one rope 22, which greatly reduces maintenance difficulty and cost.

[0021] Continue as Figures 3 to 5 As shown, the surface of the drum 21 is provided with a winding groove 26 for limiting the rope 22. The winding groove 26 radially limits the rope 22 to prevent the rope 22 from shifting laterally or jumping out of the groove during the winding process. This ensures that the rope 22 at both ends is always wound evenly along a fixed trajectory, avoiding local accumulation or slack, and further improving the winding stability and the life of the rope 22.

[0022] Continue as Figures 3 to 5 As shown, the two ends of the rope 22 have equal winding lengths at both ends of the drum 21, ensuring balanced tension at both ends of the rope 22. This keeps the rope 22 in a naturally vertical state in the middle drooping section, preventing the rope 22 from tilting or being unbalanced due to differences in winding length at both ends. This further ensures that the lifting force of the lifting device 24 is symmetrical and enhances lifting stability.

[0023] like Figure 5As shown, the lower half of the two sets of movable pulleys 25 is hidden inside the spreader 24. The hidden lower half can protect the movable pulleys 25 from direct corrosion by deck debris (such as water, oil, and debris), and extend the service life of the pulley bearings and wheel bodies. The upper half of the two sets of movable pulleys 25 is exposed outside the spreader 24. The exposed upper half facilitates direct contact with the rope 22 led out from the fixed pulley 23, ensuring smooth transmission and simplifying the structural design of the spreader 24.

[0024] like Figure 6 As shown, the power mechanism 3 includes a power motor 31 mounted on the frame 1. A coupling 32 is coaxially connected to the shaft of the power motor 31. The coupling 32 is connected to the drum 21 through a reducer 33. The power motor 31 provides rotational power, which is transmitted to the drum 21 through the coupling 32 and the reducer 33 (which reduces the speed and increases the torque). This achieves precise low-speed, high-torque winding, meeting the power requirements for lifting heavy objects. At the same time, the motor drive facilitates automated control.

[0025] like Figures 7 to 8 As shown, the drive mechanism includes a main drive assembly at the front and a driven drive assembly at the rear. Through the cooperation of the front and rear wheel sets, the winch can move smoothly on the ship's deck rails, such as adjusting the lifting position. The drive wheel 44 provides driving force, and the driven wheel 52 provides auxiliary support to ensure the equipment's movement flexibility and positioning accuracy.

[0026] like Figure 7 As shown, the main drive assembly includes a horizontally arranged main drive rod 43, with drive wheels 44 coaxially connected to both ends of the main drive rod 43. The two sets of drive wheels 44 are respectively mounted below the frame 1 via front wheel seats 45. The main drive assembly also includes a drive motor 41 mounted above the frame 1. The drive motor 41 is connected to the main drive rod 43 via a reducer 42. The drive motor 41 drives the main drive rod 43 to rotate via the reducer 42 (to further reduce the speed and increase the torque), thereby driving the drive wheels 44 at both ends to rotate synchronously, realizing the linear movement of the winch.

[0027] like Figure 8 As shown, the drive assembly includes a transversely arranged driven rod 51, with driven wheels 52 coaxially connected to both ends of the driven rod 51. The two sets of driven wheels 52 are respectively mounted below the frame 1 through the rear wheel seat 53. The driven wheels 52 move synchronously with the drive wheel 44, providing additional support force, distributing the overall weight of the winch, preventing tipping or track damage caused by center of gravity shift during movement, and enhancing movement stability.

[0028] like Figure 9As shown, both reducer 33 and reducer 42 are two-stage reducers. The two-stage reduction design uses a small gear to drive a large gear in a step-by-step transmission, which significantly reduces the output speed and greatly increases the output torque, meeting the low-speed, high-load requirements for lifting heavy objects and moving equipment. The two-stage reducer includes a housing 6, in which a first reduction shaft 7, a second reduction shaft 7, and a third reduction shaft 8 are rotatably mounted sequentially. The first reduction shaft 7 and the second reduction shaft 7 are respectively coaxially mounted with a first-stage driving gear 9 and a first-stage driven gear 10 that mesh with each other, wherein the diameter of the first-stage driving gear 9 is smaller than the diameter of the first-stage driven gear 10. The second reduction shaft 7 and the third reduction shaft 8 are respectively coaxially mounted with a second-stage driving gear 11 and a second-stage driven gear 12 that mesh with each other, wherein the diameter of the second-stage driving gear 11 is smaller than the diameter of both the first-stage driven gear 10 and the second-stage driven gear 12. The reasonable diameter ratio of the above gear pairs can further optimize the transmission ratio and improve the transmission efficiency.

[0029] Working principle of the invention: Lifting process: The power motor 31 starts and drives the reducer 33 to rotate through the coupling 32. The reducer 33 converts the high speed of the motor into low speed and high torque to drive the drum 21 to rotate. The drum 21 winds or releases the two ends of the single rope 22 in the same direction from both ends to the middle. The middle hanging section is deflected by the fixed pulley 23 and splits into two strands, which pass through the two sets of movable pulleys 25 of the lifting device 24 respectively. When the drum 21 winds the rope 22, the two strands of rope 22 are tightened synchronously, and the lifting device 24 and the load are lifted through the movable pulleys 25. When the rope 22 is released, the descent is achieved. Movement process: Drive motor 41 drives main drive rod 43 to rotate through reducer 42. Main drive rod 43 drives drive wheel 44 at both ends to rotate. Driven wheel 52 follows synchronously, pushing winch to move on deck track to target lifting position; driven wheel 52 provides auxiliary support to ensure smooth movement. Stability assurance: The unidirectional winding of both ends of a single rope 22 ensures uniform winding. After being split by a fixed pulley 23 in the middle, the two ropes 22 apply symmetrical tension to the two sets of movable pulleys 25 of the lifting device 24, avoiding the problem of wear differences among multiple ropes 22. The winding groove 26 and the equal length of both ends further ensure that the ropes 22 are subjected to balanced forces, thereby achieving smooth lifting and lowering of the lifting device 24.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ship deck single-rope double-lifting mobile winch, comprising a frame, a lifting mechanism installed below the frame, a power mechanism installed above the frame, and a drive mechanism installed below the frame; characterized in that: The lifting mechanism includes a drum that is horizontally mounted above the frame and can be driven to rotate. A rope is wound on the drum, with both ends of the rope wound in the same direction from both ends of the drum towards the middle of the drum. The middle of the rope hangs down and passes around a fixed pulley mounted below the frame. A lifting device is installed between the drum and the fixed pulley. The two sets of movable pulleys of the lifting device rest on two ropes led out from the fixed pulley.

2. The ship deck single-rope double-lifting mobile winch according to claim 1, characterized in that, The surface of the drum is provided with a winding groove for rope positioning.

3. The ship deck single-rope double-lifting mobile winch according to claim 1, characterized in that, The two ends of the rope have equal winding lengths at both ends of the drum body.

4. The ship deck single-rope double-lifting mobile winch according to claim 1, characterized in that, The lower half of the two sets of movable pulleys is hidden inside the lifting device, while the upper half of the two sets of movable pulleys is exposed outside the lifting device.

5. The ship deck single-rope double-lifting mobile winch according to claim 1, characterized in that, The power mechanism includes a power motor mounted on the frame, and a coupling is coaxially connected to the shaft of the power motor. The coupling is connected to the drum drive through a reducer.

6. The ship deck single-rope double-lifting mobile winch according to claim 1, characterized in that, The drive mechanism includes a main drive assembly located at the front and a slave drive assembly located at the rear.

7. The ship deck single-rope double-lifting mobile winch according to claim 6, characterized in that, The main drive assembly includes a transversely arranged main drive rod, with drive wheels coaxially connected to both ends of the main drive rod. The two sets of drive wheels are respectively mounted on the lower part of the frame through front wheel seats. The main drive assembly also includes a drive motor mounted on the upper part of the frame. The drive motor is connected to the main drive rod through a reducer.

8. The ship deck single-rope double-lifting mobile winch according to claim 6, characterized in that, The driven assembly includes a transversely arranged driven transmission rod, with driven wheels coaxially connected to both ends of the driven transmission rod. The two sets of driven wheels are respectively mounted under the frame via rear wheel seats.

9. The ship deck single-rope double-lifting mobile winch according to claim 7, characterized in that, Both reducer one and reducer two are two-stage reducers.

10. The ship deck single-rope double-lifting mobile winch according to claim 9, characterized in that, The two-stage reducer includes a housing, within which a first reduction shaft, a second reduction shaft, and a third reduction shaft are rotatably mounted in sequence. The first and second reduction shafts are coaxially mounted with a primary driving gear and a primary driven gear, respectively, which mesh with each other. The diameter of the primary driving gear is smaller than the diameter of the primary driven gear. The second and third reduction shafts are coaxially mounted with a secondary driving gear and a secondary driven gear, respectively, which mesh with each other. The diameter of the secondary driving gear is smaller than the diameters of both the primary and secondary driven gears.

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