Lock beam positioning device for a ship lift
By using positive and negative screws to drive the horizontal and vertical adjustment of the locking plate in the ship lift, the accuracy and stability problems of docking the bearing plates of the traditional ship lift are solved, and an efficient and stable docking process is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOHYDRO BUREAU 5
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-23
Smart Images

Figure CN224394447U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of locking beam installation equipment for ship lifts, and specifically to a locking beam positioning device for ship lifts. Background Technology
[0002] Ship lifts are large facilities used for lifting, transferring, and repairing ships. They can lift ships from water to land or transfer them from land to water, meeting the needs of ships entering and leaving dry dock and for maintenance, improving port operation efficiency, and ensuring the smooth passage of ships between different water levels.
[0003] The locking beam structure mainly consists of a beam and a locking plate. After the beam and locking plate are assembled and installed, the locking plate is controlled by a hydraulic cylinder to move in coordination with the ship lift platform. During the lifting or transfer of a ship, it locks and positions the ship lift platform to ensure its stability and reliability, prevents accidental movement, and ensures the safety of ship operations. It also plays a crucial role in securing the platform during load tests.
[0004] In traditional docking methods, the main method relies on the active docking of the ship lift's support plate with the locking plate. This method has several drawbacks: due to the huge weight of the support plate, it is necessary to use large lifting equipment to move it during docking. This process not only consumes a lot of energy, but also the support plate is easily affected by external factors during lifting and moving, resulting in poor stability and affecting the accuracy and efficiency of docking. Utility Model Content
[0005] The purpose of this invention is to provide a locking beam positioning device for a ship lift, which solves the problem that the excessive weight of the bearing plate and the poor stability due to external interference affect the docking accuracy and efficiency during the docking process between the bearing plate and the locking beam of the ship lift.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] A locking beam positioning device for a ship lift includes a housing, a motor, a positive threaded screw, a negative threaded screw, a coupling, a left locking component, and a right locking component;
[0008] Box body, with an opening at the bottom;
[0009] The motor is located on the side wall of the housing;
[0010] The left end of the positive thread screw is rotatably connected to the left side wall of the housing, and the right end is connected to the left end of the negative thread screw via a coupling;
[0011] The reverse threaded screw has its right end passing through the right side wall of the housing and connecting to the motor's output shaft.
[0012] The left locking component includes a mounting block, a lifting cylinder, and a locking plate. The mounting block is screwed onto a positive threaded rod. The lifting cylinder is located at the lower end of the mounting block, and the piston rod of the lifting cylinder is vertically connected to the locking plate. The locking plate is vertically positioned and has multiple locking holes for connecting to the support plate of the ship lift locking beam.
[0013] The right locking component has the same structure as the left locking component and is hinged to the reverse thread screw.
[0014] As a further technical solution of the above scheme, the side wall of the lifting cylinder is provided with multiple limiting seats; it also includes multiple limiting rods, one end of which is connected to the left side wall of the housing, and the other end passes through the limiting seat and is connected to the right side wall of the housing.
[0015] As a further technical solution of the above solution, the top of the box is provided with a fixed pulley for winding the pulley to the support plate; the top two sides of the box are also provided with lifting lugs.
[0016] As a further technical solution to the above scheme, the fixed pulley is provided with a protective shell.
[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0018] By installing positive and negative threaded screws inside the housing, a motor drives the positive and negative threaded screws to rotate. During the rotation, the locking plate moves laterally to adjust its horizontal position. The lifting cylinder is then activated to lift the locking plate, adjusting its vertical height. After the locking plate and the support plate are aligned, they are connected. This eliminates the need for lifting equipment to move the support plate for connection, reducing resource waste and improving connection accuracy. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0020] Figure 2 This is a top view of the structure of this device.
[0021] Figure 3 for Figure 2 Schematic diagram of the AA section.
[0022] Figure 4 This is a three-dimensional structural diagram of the left and right locking components.
[0023] The meanings of the labels in the diagram are as follows:
[0024] Housing-1; Motor-2; Positive threaded screw-3; Negative threaded screw-4; Coupling-5;
[0025] Left locking component - 6; mounting block - 61; lifting cylinder - 62; locking plate - 63;
[0026] Right locking component-7; limit seat-8; limit rod-9; fixed pulley-10; lifting lug-11; protective shell-12. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, so as to provide a better understanding of the concept of the present utility model, the technical problem solved, the technical features constituting the technical solution and the technical effects brought about.
[0028] like Figures 1-4 As shown, a locking beam positioning device for a ship lift includes a housing 1, a motor 2, a positive threaded screw 3, a negative threaded screw 4, a coupling 5, a left locking component 6, and a right locking component 7.
[0029] Box 1, with an opening at the bottom;
[0030] Motor 2 is installed on the side wall of housing 1;
[0031] The left end of the positive thread screw 3 is rotatably connected to the left side wall of the housing 1, and the right end is connected to the left end of the negative thread screw 4 via a coupling 5.
[0032] The right end of the reverse thread screw 4 passes through the right side wall of the housing 1 and connects to the output shaft of the motor 2;
[0033] The left locking component 6 includes a mounting block 61, a lifting cylinder 62, and a locking plate 63; the mounting block 61 is screwed onto the positive threaded rod 3, the lifting cylinder 62 is located at the lower end of the mounting block 61, and the piston rod of the lifting cylinder 62 is vertically connected to the locking plate 63; the locking plate 63 is vertically arranged and has multiple locking holes for connecting to the bearing plate of the ship lift locking beam;
[0034] The right locking component 7 has the same structure as the left locking component 6 and is hinged to the reverse thread screw 4.
[0035] In practical use, this device has multiple units, evenly spaced on both sides of the ship lift platform, for docking with the ship lift's support plate. During docking, the position of the locking plate 63 needs adjustment. The positive threaded screw 3 and the negative threaded screw 4 are located inside the housing 1. Starting the motor 2 drives the positive threaded screw 3 and the negative threaded screw 4 to rotate. The coupling 5 serves as the connecting component between the positive threaded screw 3 and the negative threaded screw 4, ensuring that both screws rotate simultaneously. During rotation, the left locking component 6 and the right locking component 7 move towards the center, adjusting the lateral position of the locking plate 63. Adjustment; the mounting block 61 is screwed onto the positive threaded screw 3 or the negative threaded screw 4 as the mounting base. The lifting cylinder 62 is activated to drive the locking plate 63 to move downward. The locking hole on the locking plate 63 is aligned with the bearing plate, providing a stable and reliable locking position for the bearing plate, ensuring the safe and efficient operation of the ship lift. The position of the locking plate 63 is adjusted to adapt to the position of the bearing plate. The locking plate 63 moves flexibly, and when the locking plate 63 is worn or damaged during use, there is no need to replace the entire structure. Only the locking plate 63 and the lifting cylinder 62 need to be disassembled.
[0036] like Figure 4 As shown, in a preferred embodiment, the side wall of the lifting cylinder 62 is provided with a plurality of limiting seats 8; it also includes a plurality of limiting rods 9, one end of which is connected to the left side wall of the housing 1, and the other end passes through the limiting seat 8 and is connected to the right side wall of the housing 1.
[0037] In this embodiment, the side wall of the lifting cylinder 62 is provided with multiple limiting seats 8. A limiting rod 9 is used to pass through the limiting seats 8, and the two ends of the limiting rod 9 are respectively connected to the side wall of the housing 1. During the process of the lifting cylinder 62 moving along the positive thread screw 3 and the negative thread screw 4, the limiting rod 9 limits the movement direction, thereby improving the stability and pressure bearing capacity of the device.
[0038] like Figure 1 and Figure 3 As shown, in a preferred embodiment, the top of the box 1 is provided with a fixed pulley 10 for winding the pulley connected to the bearing plate; the top two sides of the box 1 are also provided with lifting lugs 11.
[0039] In this embodiment, a fixed pulley 10 is provided for winding the pulley to the bearing plate. After the device is connected, it plays an auxiliary role in stabilizing the hoisting process. The lifting lugs of the box body 1 serve as the main hoisting structure.
[0040] like Figure 1 and Figure 3 As shown in the preferred embodiment, the fixed pulley 10 is provided with a protective outer shell 12.
[0041] In this embodiment, a protective shell 12 is provided on the outside of the fixed pulley 10 to protect the fixed pulley 9 from dust interference.
[0042] After all the locking beam positioning structures of this application are assembled, the device is positioned. When the support plate is lowered below the maintenance position, the two lifting cylinders drive the two locking plates to move vertically until the locking holes of the two locking plates are in the same lateral position with the support plate on the same side. Then the drive motor is rotated, and the two locking plates are brought closer to each other by the action of the positive and negative screws until the locking plates are engaged with the support plate.
[0043] The locking beam positioning structure of this application achieves active docking of the locking plate with the bearing plate through the cooperation of the lateral adjustment component and the lifting cylinder. This method effectively avoids the problems of high energy consumption and poor stability caused by the active docking of the bearing plate in traditional docking methods, significantly improves the energy utilization efficiency of the docking process, enhances the stability during docking, and provides a strong guarantee for the efficient and stable operation of the entire ship lift system.
[0044] The terms "connection" and "fixing" appearing in this utility model description can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this utility model should be understood according to the specific circumstances.
[0045] In the description of this utility model, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., are used only to indicate the orientation or positional relationship for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A locking beam positioning device for a ship lift, characterized in that: It includes a housing (1), a motor (2), a positive threaded screw (3), a negative threaded screw (4), a coupling (5), a left locking component (6), and a right locking component (7); Box body (1), with an opening at the bottom; The motor (2) is installed on the side wall of the housing (1); The left end of the positive thread screw (3) is rotatably connected to the left side wall of the housing (1), and the right end is connected to the left end of the negative thread screw (4) via a coupling (5); The right end of the reverse thread screw (4) passes through the right side wall of the housing (1) and connects to the output shaft of the motor (2); The left locking component (6) includes a mounting block (61), a lifting cylinder (62), and a locking plate (63); the mounting block (61) is screwed onto the positive threaded rod (3), the lifting cylinder (62) is located at the lower end of the mounting block (61), and the piston rod of the lifting cylinder (62) is vertically connected to the locking plate (63); the locking plate (63) is vertically arranged, and the locking plate (63) is provided with multiple locking holes for connecting to the bearing plate of the ship lift locking beam; The right locking component (7) has the same structure as the left locking component (6) and is hinged to the reverse thread screw (4).
2. The locking beam positioning device for a ship lift as described in claim 1, characterized in that: The lifting cylinder (62) has multiple limit seats (8) on its side wall; it also includes multiple limit rods (9), one end of which is connected to the left side wall of the housing (1), and the other end passes through the limit seat (8) and is connected to the right side wall of the housing (1).
3. The locking beam positioning device for a ship lift as described in claim 1, characterized in that: The top of the box (1) is provided with a fixed pulley (10) for winding the pulley to connect to the bearing plate; the top sides of the box (1) are also provided with lifting lugs (11).
4. A locking beam positioning device for a ship lift as described in claim 3, characterized in that: The fixed pulley (10) is provided with a protective shell (12).