A steerable jacking device

Abstract

The utility model relates to a transfer equipment technical field discloses a kind of steering jacking devices. The jacking device includes first jacking assembly and second jacking assembly, and the second jacking assembly includes second cylinder barrel, and the second cylinder barrel inner cavity is equipped with jacking part and steering part;Jacking part is telescopic oil cylinder assembly;Steering part includes second output screw rod, and second output screw rod one end inserts the second piston rod inner cavity of jacking part;Second output screw rod is equipped with second hollow screw rod and second guide sleeve, and second hollow screw rod is connected with second output screw rod screw thread;Second hollow screw rod outside is connected with second fixed nut screw thread;Steering first oil passage and steering second oil passage are set on second end cover. The utility model is combined by first jacking assembly and second jacking assembly, realizes automatic steering function, solves the problems, such as manual steering, bearing easy to jam and high maintenance cost, in the transfer trolley of prior art.

Description

Technical Field

[0001] This utility model relates to the field of transfer equipment technology, and in particular to a steerable lifting device, which is suitable for situations requiring lifting and steering in shipbuilding or the transfer of large equipment. Background Technology

[0002] Currently, transfer and lifting trolleys typically consist of two parts: a first lifting component for lifting ships or other heavy objects, and a second lifting component for lifting the transfer trolley itself. However, in existing technologies, the steering of the transfer trolley after being lifted requires manual operation, which has the following drawbacks:

[0003] (1) Manual steering is inefficient and affects the speed of track changing;

[0004] (2) Manual operation poses safety hazards;

[0005] (3) Steering relies on the roller bearings built into the lifting cylinder. After long-term use, jamming or irregularity may occur, making it difficult to change tracks.

[0006] (4) Bearings need to be maintained or replaced regularly, which increases manpower and maintenance costs;

[0007] (5) The bearing is installed inside the oil cylinder, making disassembly and maintenance cumbersome. Utility Model Content

[0008] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a steerable lifting device. By combining the first lifting component and the second lifting component, the automatic steering function is realized, which solves the problems of manual steering of the transfer trolley, easy jamming of bearings and high maintenance costs in the prior art.

[0009] The technical solution adopted by this utility model to solve its technical problem is:

[0010] A steerable lifting device includes a first lifting assembly and a second lifting assembly that are connected vertically. The second lifting assembly includes a second cylinder, a third end cap is installed at one end of the second cylinder, a second end cap is installed at the other end of the second cylinder, and a lifting component and a steering component are provided in the inner cavity of the second cylinder.

[0011] The lifting component is a telescopic hydraulic cylinder assembly;

[0012] The steering component includes a second output screw, one end of which is inserted into the inner cavity of the second piston rod of the lifting component, and the other end of which extends out of the second locking cover plate. A second hollow screw and a second guide sleeve are fitted around the second output screw. The second hollow screw is threadedly connected to the second output screw and is located close to the second locking cover plate. A second fixing nut is threadedly connected to the outer side of the second hollow screw. The second end cover has a first steering oil passage and a second steering oil passage to realize the axial movement of the second hollow screw along the second cylinder. The axial movement of the second hollow screw drives the second output screw to rotate, and the rotation of the second output screw drives the second piston rod to rotate.

[0013] Automatic steering: The second hollow screw is controlled by an oil circuit to move axially along the second cylinder, driving the second output screw to rotate, which in turn drives the second piston rod to rotate, achieving automatic steering of the transfer trolley without manual intervention. Compact structure: The lifting and steering components are integrated into the second lifting assembly, reducing additional transmission mechanisms and lowering the overall size. Improved reliability: Hydraulic drive improves steering stability and response speed, and avoids the jamming problem of traditional bearings after long-term use, reducing maintenance requirements.

[0014] Furthermore, the lifting component includes a second piston rod. One end of the second piston rod extends out of the third end cover and is connected to the first lifting assembly via a flange. The other end of the second piston rod is connected to a second guide block. A second piston is fitted over the second piston rod and is positioned close to the second guide block. The second piston rod not only performs the lifting function but also works in conjunction with the second output screw via the second guide block to ensure the stability of the steering action after lifting.

[0015] Furthermore, the first lifting assembly includes a first cylinder, one end of which has a first cylinder bottom connected to the second lifting assembly, and the other end of which has a first end cap. A first piston rod is built into the first cylinder, one end of which extends out of the first end cap and connects to a swing plate. A first guide sleeve is built into the first cylinder to guide the first piston rod, and the first guide sleeve is positioned close to the first end cap. The swing plate is designed to allow for small-amplitude swings, mitigating lateral forces when lifting ships or heavy objects and improving the stability of the device.

[0016] Furthermore, a first support plate is installed at the outer end of the swing plate. The first support plate is fixed to the swing plate to distribute the force and avoid local stress concentration.

[0017] Furthermore, the second guide block has an inner hole at its center. The outer edge structure of the portion of the second output screw inserted into the inner cavity of the second piston rod mates with this inner hole, which is a waist-shaped hole. The two ends of the waist-shaped hole are arc-shaped segments connected by straight segments. The arc-shaped contact surfaces of the arc-shaped segments disperse stress, while the straight segments provide axial constraint. This structure allows for axial movement of the second output screw while preventing radial offset during rotation, ensuring the transmission accuracy and stability of the rotating components and reducing component wear.

[0018] Furthermore, the swing plate is connected to the first piston rod via a first screw. The connection between the swing plate and the first piston rod has a curved surface fit, and the side of the swing plate closest to the first piston rod is arc-shaped. A swing hole is formed at the center of the swing plate, through which the first screw passes. A gap is provided between the inner wall of the swing hole and the outer wall of the first screw. The connection between the swing plate and the first piston rod via the first screw simplifies the installation and disassembly process, facilitating maintenance and replacement. The gap between the inner wall of the swing hole and the outer wall of the first screw allows for small-amplitude swinging of the swing plate.

[0019] Furthermore, the cross-section of the swing hole is tapered, and the larger end of the swing hole is located close to the first piston rod. The tapered hole facilitates smooth swinging of the swing plate without interference.

[0020] Furthermore, the inner wall of the second end cap is provided with a step to prevent the second fixing nut from moving. This physical limitation prevents the nut from loosening due to vibration or impact, ensuring the stability of the threaded connection between the second hollow screw and the second output screw, and reducing the equipment failure rate.

[0021] Furthermore, a second locking cover plate is installed on the outer end of the second end cover, and a second support base plate is installed on the outer end of the second locking cover plate. The second support base plate provides a stable base support for the second lifting assembly, avoiding lifting tilt or vibration caused by an unstable base, and improving the overall load-bearing capacity and operational safety of the device.

[0022] Furthermore, the second support base plate has a receiving cavity at its center to accommodate the protruding part of the second output screw. This cavity in the center of the second support base plate accommodates the protruding part of the second output screw, preventing damage to the protruding part caused by external impact or dust ingress. It also optimizes the structural layout, reduces space occupation, and improves the compactness and protective performance of the device.

[0023] The beneficial effects of this utility model are as follows: This utility model has a simple structure and reasonable design, and has the following advantages:

[0024] (1) Functional integration: The combined design of the lifting component and the steering component allows the device to adjust its direction during the lifting process, adapt to multi-directional load requirements, improve operational flexibility, completely replace manual intervention, and significantly improve efficiency;

[0025] (2) Precise transmission: Through the special shape design of the inner hole, the cooperation between the second guide block and the second piston rod, and the anti-movement structure of the nut, the transmission accuracy and stability of the steering component are ensured, and wear and failure are reduced;

[0026] (3) Strong adaptability: The structure of the swing plate, the first support plate and other structures enables the device to adapt to complex working conditions, meet the lifting and turning requirements of different scenarios, improve the versatility of the equipment, and meet the diverse needs of shipbuilding, heavy industry and other industries. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the steerable lifting device in Embodiment 1;

[0029] Figure 2 yes Figure 1 A sectional view;

[0030] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0031] Figure 4 yes Figure 2 A magnified view of a section at point B in the middle;

[0032] Figure 5 yes Figure 4 A magnified view of a section at point C;

[0033] Figure 6 This is a schematic diagram of the structure of the second guide block in Embodiment 1.

[0034] In the diagram: 10. First lifting assembly, 20. Second lifting assembly, 11. First cylinder, 12. First piston rod, 13. First guide sleeve, 14. First screw, 15. Swing plate, 16. First support plate, 17. First cylinder bottom, 21. Second support base plate, 22. Second locking cover plate, 23. Second end cover, 24. Second fixing nut, 25. Second hollow screw, 26. Second guide sleeve, 27. Second guide block, 28. Second output screw, 29. Second piston, 210. Second piston rod, 211. Third end cover, 212. Flange, 213. Second cylinder, 214. Inner hole, 215. First steering oil passage, 216. Second steering oil passage. Detailed Implementation

[0035] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application. As used herein, the singular form includes the plural form unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this description, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] Example 1

[0039] like Figures 1-6 The illustrated steerable lifting device includes a first lifting assembly 10 and a second lifting assembly 20 connected vertically. The second lifting assembly 20 includes a second cylinder 213, with a third end cap 211 mounted on one end and a second end cap 23 mounted on the other end. A second locking cover plate 22 is mounted on the outer end of the second end cap 23. The inner cavity of the second cylinder 213 is provided with a lifting component and a steering component. The lifting component is a telescopic cylinder assembly. The steering component includes a second output screw 28, one end of which is inserted into the inner cavity of the second piston rod 210 of the lifting component. The other end of the screw 28 extends out of the second locking cover plate 22; a second hollow screw 25 and a second guide sleeve 26 are fitted around the second output screw 28, the second hollow screw 25 is threadedly connected to the second output screw 28 and is positioned close to the second locking cover plate 22; a second fixing nut 24 is threadedly connected to the outer side of the second hollow screw 25, that is, the second fixing nut 24 and the second hollow screw 25 form a helical pair, and the second hollow screw 25 and the second output screw 28 also form a helical pair; a first steering oil passage 215 and a second steering oil passage 216 are provided on the second end cover 23, such as Figure 4 and Figure 5As shown, the first steering oil circuit 215 causes the second hollow screw 25 to move downward, and the second steering oil circuit 216 causes the second hollow screw 25 to move upward. The up and down movement of the second hollow screw 25 drives the second output screw 28 to rotate in both directions, and the rotation of the second output screw 28 in turn drives the second piston rod 210 to rotate.

[0040] The second hollow screw 25 is controlled by an oil circuit to move axially along the second cylinder 213, driving the second output screw 28 to rotate, thereby turning the transfer trolley. In addition, the lifting and steering components are integrated into the second lifting assembly 20, which enables the extension, retraction, and rotation of the second piston rod 210, reducing the need for additional transmission mechanisms and lowering the overall size.

[0041] The lifting component includes a second piston rod 210. One end of the second piston rod 210 extends out of the third end cap 211 and is connected to the first lifting assembly 10 via a flange 212. The other end of the second piston rod 210 is connected to a second guide block 27. A second piston 29 is fitted over the second piston rod 210 and is positioned close to the second guide block 27. The second guide block 27 has an inner hole 214 at its center. The outer edge of the second output screw 28, which is inserted into the inner cavity of the second piston rod 210, mates with the inner hole 214. The inner hole 214 is an oblong hole, which allows for axial movement of the second output screw 28 while preventing radial offset during rotation, ensuring the transmission accuracy and stability of the rotating component and reducing component wear.

[0042] The inner wall of the second end cap 23 is provided with a step to prevent the second fixing nut 24 from moving. Physical limiting prevents the nut from loosening due to vibration or impact, ensuring the stability of the threaded connection between the second hollow screw 25 and the second output screw 28, and reducing the equipment failure rate.

[0043] The second locking cover plate 22 has a second support base plate 21 installed on its outer end. The second support base plate 21 provides a stable base support for the second lifting assembly 20, avoiding lifting tilt or vibration caused by an unstable base, and improving the overall load-bearing capacity and operational safety of the device.

[0044] The second support base plate 21 has a cavity at its center to accommodate the protruding part of the second output screw 28. This cavity accommodates the protruding part of the second output screw 28, preventing damage caused by external impact or dust entry. It also optimizes the structural layout, reduces space occupation, and improves the compactness and protective performance of the device.

[0045] The first lifting assembly 10 includes a first cylinder 11, one end of which is provided with a first cylinder bottom 17 connected to the second lifting assembly 20, and the other end of which is provided with a first end cap 18; the first cylinder 11 contains a first piston rod 12, one end of which extends out of the first end cap 18 and is connected to a swing plate 15; the first cylinder 11 contains a first guide sleeve 13 for guiding the first piston rod 12, and the first guide sleeve 13 is disposed near the first end cap 18; a first support plate 16 is installed on the outer end of the swing plate 15.

[0046] The swing plate 15 is connected to the first piston rod 12 via a first screw 14. The connection between the swing plate 15 and the first piston rod 12 is a mating connection (curved surface mating), and the side of the swing plate 15 closest to the first piston rod 12 is an arc-shaped portion. Specifically, the swing plate 15 has an arc-shaped portion, and the first piston rod 12 has a groove portion that mates with the arc-shaped portion. This structure facilitates the swing of the swing plate 15.

[0047] The swing plate 15 has a swing hole at its center, through which the first screw 14 passes. A gap exists between the inner wall of the swing hole and the outer wall of the first screw 14. The swing hole has a tapered cross-section, specifically a trumpet-shaped hole. The larger end of the swing hole is located close to the first piston rod 12, meaning that the inner diameter of the swing hole is larger the closer it is to the first piston rod 12.

[0048] A first support plate 16 is installed at the outer end of the swing plate 15. The first support plate 16 is connected to the external components. A gap is provided between the inner wall of the swing hole and the outer wall of the first screw 14, so that the swing plate 15 can swing passively in a small range, thereby relieving the lateral force when lifting ships or heavy objects and improving the stability of the device.

[0049] The specific working process of the steerable lifting device in this embodiment is as follows:

[0050] (1) When the first lifting assembly 10 is working, the first piston rod 12 extends to lift the heavy object; during the lifting process, the swing plate 15 can swing slightly to alleviate the influence of lateral force.

[0051] (2) The operation of the second lifting assembly 20 includes the linear motion of the second piston rod 210 and the rotational motion of the second output screw 28. The two motions are independent and do not interfere with each other. The second piston rod 210 extends and lifts linearly. If the first oil passage 215 is turned to allow oil to enter, the second hollow screw 25 is driven to move to the left. Since the second hollow screw 25 is threadedly connected to the second fixing nut 24, the second hollow screw 25 will rotate during the leftward movement. The second hollow screw 25 and the second output screw 28 transmit power through the thread, so that the second output screw 28 rotates synchronously. Due to the special shape design of the inner hole 214 of the second guide block 27, and the outer edge structure of the part of the second output screw 28 inserted into the inner cavity of the second piston rod 210 is matched with the inner hole 214, so that the second piston rod 210 rotates synchronously to achieve the turning motion. If the second oil passage 216 is turned to allow oil to enter, the second hollow screw 25 is driven to move to the right, so that the second output screw 28 rotates in the opposite direction.

[0052] In summary, this utility model has a simple structure and reasonable design, and has the following advantages:

[0053] (1) Functional integration: The combined design of the lifting component and the steering component enables the device to automatically adjust its direction during the lifting process, adapt to multi-directional load requirements, improve operational flexibility, completely replace manual intervention, and significantly improve efficiency;

[0054] (2) Precise transmission: Through the special shape design of the inner hole 214, the cooperation between the second guide block 27 and the second piston rod 210, and the anti-movement structure of the nut, the transmission accuracy and stability of the steering component are ensured, and wear and failure are reduced.

[0055] (3) Strong adaptability: The structure of swing plate 15, first support plate 16 and other structures enables the device to adapt to complex working conditions, meet the lifting and turning requirements of different scenarios, improve the versatility of the equipment, and meet the diverse needs of shipbuilding, heavy industry and other industries.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended 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 therein. Such 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 steerable lifting device, characterized in that: The system includes a first lifting assembly (10) and a second lifting assembly (20) that are connected vertically. The second lifting assembly (20) includes a second cylinder (213). A third end cap (211) is installed at one end of the second cylinder (213), and a second end cap (23) is installed at the other end of the second cylinder (213). The inner cavity of the second cylinder (213) is provided with a lifting component and a steering component. The lifting component is a telescopic hydraulic cylinder assembly; The steering component includes a second output screw (28), one end of which is inserted into the inner cavity of the second piston rod (210) of the lifting component; a second hollow screw (25) and a second guide sleeve (26) are fitted around the second output screw (28), and the second hollow screw (25) is threadedly connected to the second output screw (28); a second fixing nut (24) is threadedly connected to the outer side of the second hollow screw (25); a steering first oil passage (215) and a steering second oil passage (216) are provided on the second end cover (23) to realize the axial movement of the second hollow screw (25) along the second cylinder (213).

2. The steerable lifting device according to claim 1, characterized in that: The lifting component includes a second piston rod (210), one end of which extends out of the third end cap (211) and is connected to the first lifting assembly (10). The other end of the second piston rod (210) is connected to a second guide block (27). A second piston (29) is fitted over the second piston rod (210) and is positioned close to the second guide block (27).

3. The steerable lifting device according to claim 1, characterized in that: The first lifting assembly (10) includes a first cylinder (11), one end of which is provided with a first cylinder bottom (17) connected to the second lifting assembly (20), and the other end of which is provided with a first end cap (18); the first cylinder (11) contains a first piston rod (12), one end of which extends out of the first end cap (18) and is connected to the swing plate (15); the first cylinder (11) contains a first guide sleeve (13) for guiding the first piston rod (12), and the first guide sleeve (13) is located close to the first end cap (18).

4. A steerable lifting device according to claim 3, characterized in that: The swing plate (15) is equipped with a first support plate (16) at its outer end.

5. A steerable lifting device according to claim 2, characterized in that: The second guide block (27) has an inner hole (214) at its center. The outer edge structure of the second output screw (28) inserted into the inner cavity of the second piston rod (210) is configured to cooperate with the inner hole (214); the inner hole (214) is a waist-shaped hole.

6. A steerable lifting device according to claim 3, characterized in that: The swing plate (15) is connected to the first piston rod (12) through the first screw (14), and the connection between the swing plate (15) and the first piston rod (12) is curved; the swing plate (15) has a swing hole in the center, and the first screw (14) passes through the swing hole; there is a gap between the inner wall of the swing hole and the outer wall of the first screw (14).

7. A steerable lifting device according to claim 6, characterized in that: The swing hole has a tapered cross section, and the larger end of the swing hole is located close to the first piston rod (12).

8. A steerable lifting device according to claim 1, characterized in that: The inner wall of the second end cap (23) is provided with a step to prevent the second fixing nut (24) from moving.

9. A steerable lifting device according to claim 1, characterized in that: The second end cap (23) is fitted with a second locking cover plate (22) at its outer end, and a second support base plate (21) is fitted at its outer end.

10. A steerable lifting device according to claim 9, characterized in that: The second support base plate (21) has a cavity in the center to accommodate the protruding part of the second output screw (28).

Images