A marine crankshaft lifting platform with self-locking function

Abstract

This invention provides a marine crankshaft sleeve lifting platform with a self-locking function, relating to the field of crankshaft assembly technology. It includes a base plate, a lifting box mounted on the base plate, a lifting rod mounted on the lifting box, a top plate at the upper end of the lifting rod, and several slings on the lower surface of the top plate. A lifting mechanism is located at the lower end of the slings for lifting the crankshaft sleeve. A self-locking component is also provided on the lifting box to restrict the movement of the lifting rod. A limit component is also provided on the lifting rod to limit the swing of the slings. By incorporating the self-locking and limit components, this invention allows the self-locking component to quickly lock the lifting rod in case of an abnormal situation during crankshaft sleeve lifting and adjustment, preventing the top plate from falling and effectively avoiding the structural damage risk caused by the crankshaft sleeve impacting the ground. The limit component effectively suppresses the swing of the slings, ensuring stable crankshaft sleeve lifting and effectively reducing the probability of the crankshaft sleeve falling.

Description

Technical Field

[0001] This invention relates to the field of crankshaft assembly technology, specifically to a marine crankshaft red sleeve lifting platform with a self-locking function. Background Technology

[0002] Marine semi-assembled crankshaft components are assembled using interference fits between shaft holes and a hot-fitting method. Assembly is divided into two processes: individual assembly and complete assembly. Individual assembly involves assembling the rotating shaft component with the crankshaft. This only requires lifting the shaft component and ensuring its axis aligns with the center line of the crankshaft's hot-fitting hole to complete the assembly, forming a crankshaft-crank assembly. Complete assembly involves sequentially assembling the previously individually assembled assemblies, inserting the shaft of one assembly into the hot-fitting hole of the crankshaft of another assembly.

[0003] Traditional lifting platforms are prone to slippage when power is interrupted or abnormal situations occur after lifting the crankshaft bushing. This can cause the crankshaft bushing to collide with the ground, resulting in structural damage to the bushing. In addition, the slings may swing due to inertia during the lifting process, which can also lead to imbalance in the crankshaft bushing lifting, further increasing the risk of the bushing falling. This could potentially cause personal injury and property damage, making the system both unsafe and uneconomical. Summary of the Invention

[0004] The present invention provides a marine crankshaft sleeve lifting platform with self-locking function to solve at least one of the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention discloses a marine crankshaft sleeve lifting platform with a self-locking function, including a base plate, a lifting box on the base plate, a lifting rod installed on the lifting box, a top plate at the upper end of the lifting rod, a plurality of slings on the lower surface of the top plate, a lifting mechanism at the lower end of the slings, the lifting mechanism being used to lift the crankshaft sleeve, a self-locking component on the lifting box for restricting the movement of the lifting rod, and a limit component on the lifting rod for restricting the swing of the slings.

[0006] Preferably, a drive motor is fixedly installed on the lower inner wall of the lifting box, and a threaded rod is fixedly connected to the upper output end of the drive motor. A movable plate is threadedly connected to the threaded rod, and the movable plate is slidably connected to the inner wall of the lifting box. A lifting rod is provided on the movable plate, and the lifting rod slides upward and extends out of the lifting box. A cavity is provided inside the lifting rod, and the threaded rod extends into the cavity. A rotating plate is fixedly connected to the upper end of the threaded rod, and the rotating plate is slidably connected to the cavity.

[0007] Preferably, the self-locking assembly includes symmetrically arranged moving rods, through slots are provided on the left and right side walls of the lifting box, a moving plate extends out of the lifting box from the through slots, the moving plate is fixedly connected to the moving rods, and several triangular blocks are fixedly arranged on the moving rods.

[0008] Preferably, a U-shaped plate is fixedly installed on the left and right side walls of the lifting box. Several through slots are opened on the U-shaped plate. A self-locking rod is slidably installed in the through slot. A disc is fixedly installed on the front and rear sides of the self-locking rod. A spring is also fixedly installed in the through slot. The spring is fixedly connected to the self-locking rod. The self-locking rod cooperates with the triangular block.

[0009] Preferably, a collar is slidably provided on the lifting rod, a movable ring is fixedly connected to the upper end of the collar, limit components are symmetrically provided on the movable ring, a positioning hole one is provided on the collar, and a positioning hole two is provided on the lifting rod.

[0010] Preferably, the limiting component includes an irregularly shaped fixing block, which is fixedly connected to the moving ring. The other end of the irregularly shaped fixing block is fixedly connected to a U-shaped plate II. A connecting rod is provided inside the U-shaped plate II. A buffer rod is slidably provided on the connecting rod. A spring II is symmetrically fixed on the buffer rod and sleeved on the connecting rod.

[0011] The other end of the buffer rod is fixedly connected to a U-shaped frame. A buffer plate is slidably installed inside the U-shaped frame. A guide rod is slidably installed through the buffer plate. The guide rod is fixedly connected to the U-shaped frame. A spring is sleeved on the guide rod. One end of the spring is fixedly connected to the buffer plate, and the other end of the spring is fixedly connected to the U-shaped frame.

[0012] Preferably, protruding plates are symmetrically fixed on the U-shaped frame, and rotating blocks are rotatably set on the side of the protruding plates that are close to each other. Fixed rods are symmetrically fixed on the rotating blocks, and rotating wheels are rotatably installed on the fixed rods, with the rotating wheels in contact with the buffer plates.

[0013] Preferably, a bidirectional threaded rod is rotatably provided at the eccentric position of the rotating block, and U-shaped plates are rotatably connected to both ends of the bidirectional threaded rod. L-shaped moving blocks are symmetrically threaded on the bidirectional threaded rod. A sliding groove is provided on the U-shaped plate, and the L-shaped moving blocks slide out of the U-shaped plate from the sliding groove. A connecting rod is fixedly provided on the side of the L-shaped moving blocks that are close to each other. An arc plate is fixedly provided on the connecting rod. A plug-in block is fixed on one of the arc plates, and a plug-in groove is provided on the other arc plate. The plug-in block and the plug-in groove cooperate with each other.

[0014] Preferably, a through groove is provided on the front side of the second U-shaped plate, a movable box is slidably arranged in the through groove, the front side of the connecting rod is fixedly connected to the movable box, a sliding plate is fixedly arranged on the rear side of the connecting rod, the sliding plate is slidably connected to the second U-shaped plate, the second spring on the front side is fixedly connected to the movable box, and the second spring on the rear side is fixedly connected to the sliding plate.

[0015] A positioning plate is fixedly connected to the front of the mobile box. Positioning rods are symmetrically slidably installed on the positioning plate. Several symmetrical rows of positioning holes are opened on the front side of the U-shaped plate. The positioning rods cooperate with the positioning holes.

[0016] Preferably, a drive plate is provided on the front side of the positioning plate, and a drive rod is fixedly provided on the drive plate. The drive rod slides into the movable box, and a spring plate is slidably provided inside the movable box. The spring plate is fixedly connected to the drive rod, and a spring four is sleeved on the drive rod. One end of the spring four is fixedly connected to the spring plate, and the other end of the spring four is fixedly connected to the movable box. The positioning rod is fixedly connected to the drive plate.

[0017] Compared with the prior art, the present invention provides a marine crankshaft sleeve lifting platform with a self-locking function. By setting a self-locking component and a limiting component, when the crankshaft sleeve is being hoisted and adjusted, if an abnormal situation occurs, the self-locking component can quickly lock the lifting rod to prevent the top plate from falling and effectively avoid the risk of structural damage caused by the crankshaft sleeve hitting the ground. The limiting component effectively suppresses the swing of the sling, ensuring the stability of the crankshaft sleeve hoisting, which can effectively reduce the probability of the crankshaft sleeve falling, greatly improve the safety of equipment operation, and at the same time reduce the economic losses caused by workpiece damage, making it safer and more economical. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the lifting box of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the U-shaped plate of the present invention;

[0022] Figure 4 This is a schematic diagram of the sliding fit between the collar and the lifting rod of the present invention;

[0023] Figure 5 This is a schematic diagram of the limiting component of the present invention;

[0024] Figure 6 This is a schematic diagram of the U-shaped frame of the present invention;

[0025] Figure 7 This is a front view of the second U-shaped plate of the present invention;

[0026] Figure 8 This is a schematic diagram showing the connection between the positioning plate and the movable box of the present invention.

[0027] In the diagram: 1. Base plate; 2. Collar ring; 3. Crankshaft sleeve; 4. Lifting box; 5. Limiting assembly; 6. Moving ring; 7. Lifting rod; 8. Top plate; 9. Lifting sling; 10. Lifting mechanism; 11. Drive motor; 12. Moving plate; 13. Triangular block; 14. Disc; 15. Threaded rod; 16. Rotating plate; 17. U-shaped plate one; 18. Spring one; 19. Moving rod; 20. Self-locking rod; 21. Positioning hole one; 22. Positioning hole two; 23. Irregularly shaped fixing block; 24. Connecting rod; 25. Through slot; 26. Rotating wheel; 2 7. Rotating block; 28. U-shaped plate three; 29. ​​L-shaped moving block; 30. Connecting rod; 31. Insertion block; 32. Arc plate; 33. Bidirectional threaded rod; 34. Rotating wheel; 35. Extending plate; 36. Fixed rod; 37. Buffer plate; 38. U-shaped frame; 39. Buffer rod; 40. Spring two; 41. U-shaped plate two; 42. Spring three; 43. Guide rod; 44. Positioning hole; 45. Positioning plate; 46. Drive plate; 47. Drive rod; 48. Positioning rod; 49. Spring four; 50. Rebound plate; 51. Moving box. Detailed Implementation

[0028] 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.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example 1

[0032] Embodiments of the present invention provide a marine crankshaft sleeve lifting platform with a self-locking function, such as... Figures 1-8 As shown, the system includes a base plate 1, a lifting box 4 on the base plate 1, a lifting rod 7 installed on the lifting box 4, a top plate 8 at the upper end of the lifting rod 7, several slings 9 on the lower surface of the top plate 8, a hoisting mechanism 10 at the lower end of the slings 9, the hoisting mechanism 10 being used to hoist the crankshaft sleeve 3, a self-locking component on the lifting box 4 for limiting the movement of the lifting rod 7, and a limit component 5 on the lifting rod 7 for limiting the swing of the slings 9.

[0033] The working principle and beneficial effects of the above technical solution are as follows: the crankshaft sleeve 3 is installed on the hoisting mechanism 10, the lifting box 4 drives the lifting rod 7 to move, thereby realizing the lifting and lowering of the top plate 8 and the sling 9, and completing the hoisting.

[0034] By setting up a self-locking component and a limiting component 5, if an abnormal situation occurs during the hoisting and adjustment of the crankshaft red sleeve 3, the self-locking component can quickly lock the lifting rod 7 to prevent the top plate 8 from falling, effectively avoiding the risk of structural damage caused by the crankshaft red sleeve 3 hitting the ground; the limiting component 5 effectively suppresses the swing of the sling 9, ensuring the stability of the crankshaft red sleeve 3 during hoisting, which can effectively reduce the probability of the crankshaft red sleeve 3 falling, greatly improve the safety of equipment operation, and at the same time reduce the economic losses caused by workpiece damage, making it safer and more economical.

[0035] Example 2

[0036] Based on the above embodiment 1, as follows Figures 1-2 As shown, a drive motor 11 is fixedly installed on the lower inner wall of the lifting box 4. A threaded rod 15 is fixedly connected to the upper output end of the drive motor 11. A movable plate 12 is threadedly connected to the threaded rod 15. The movable plate 12 is slidably connected to the inner wall of the lifting box 4. A lifting rod 7 is installed on the movable plate 12. The lifting rod 7 slides upward and extends out of the lifting box 4. A cavity is provided inside the lifting rod 7. The threaded rod 15 extends into the cavity. A rotating plate 16 is fixedly connected to the upper end of the threaded rod 15. The rotating plate 16 is slidably connected to the cavity.

[0037] The working principle and beneficial effects of the above technical solution are as follows: the drive motor 11 drives the threaded rod 15 to rotate, and the threaded rod 15 drives the moving plate 12 to move vertically up and down along the inner wall of the lifting box 4. When the moving plate 12 moves upward, it pushes the lifting rod 7 to slide upward together, so that it extends out of the lifting box 4, driving the top plate 8, the sling 9 and the hoisting mechanism 10 to rise, thereby realizing the lifting of the crankshaft sleeve. By using the method of drive motor 11 to drive the threaded rod 15 to rotate, and the threaded rod 15 to drive the moving plate 12 to move, the lifting accuracy and stability are stronger, and it is not easy to slip, making it more practical.

[0038] Example 3

[0039] Based on the above embodiment 2, such as Figures 2-3 As shown, the self-locking assembly includes left and right symmetrical moving rods 19. Through slots are provided on the left and right side walls of the lifting box 4. The moving plate 12 extends out of the lifting box 4 from the through slots. The moving plate 12 is fixedly connected to the moving rod 19. Several triangular blocks 13 are fixedly installed on the moving rod 19.

[0040] Preferably, U-shaped plates 17 are fixedly installed on the left and right side walls of the lifting box 4. Several through slots are opened on the U-shaped plates 17. A self-locking rod 20 is slidably installed in the through slots. A disc 14 is fixedly installed on the front and rear sides of the self-locking rod 20. A spring 18 is also fixedly installed in the through slot. The spring 18 is fixedly connected to the self-locking rod 20. The self-locking rod 20 cooperates with the triangular block 13.

[0041] The working principle and beneficial effects of the above technical solution are as follows: The moving plate 12 slides up and down in the lifting box 4 through the through groove, driving the moving rod 19 to move synchronously. At this time, several triangular blocks 13 move with the moving rod 19. Under the initial tension of the spring 18, the upper end of the self-locking rod 20 keeps in contact with the inclined surface of the triangular block 13, and the lifting rod 7 can be raised and lowered freely.

[0042] In case of an abnormal situation, the movable plate 12 suddenly falls due to the gravity of the crankshaft red sleeve 3 and the top plate 8, causing the movable rod 19 to move rapidly downward. The right-angled surface of the triangular block 13 on the movable rod 19 will contact the self-locking rod 20, and the self-locking rod 20 will move to the bottom. Under the limiting action of the through groove, the movement of the movable rod 19 is restricted, forming a mechanical lock and preventing the top plate 8 from falling. The mechanical lock achieves self-locking through gravity drive, which is more reliable than electronic self-locking. It has no complex hydraulic components or electronic sensors, fewer parts and is not easy to wear, has a long maintenance cycle and low maintenance cost. In addition, it works in conjunction with the threaded control of the movement of the movable plate 12 to further reduce the risk of falling.

[0043] Example 4

[0044] Based on Example 1, such as Figure 1 and Figure 4 As shown, a collar 2 is slidably mounted on the lifting rod 7, and a movable ring 6 is fixedly connected to the upper end of the collar 2. Limiting components 5 are symmetrically mounted on the movable ring 6. A positioning hole 21 is provided on the collar 2, and a positioning hole 22 is provided on the lifting rod 7.

[0045] The working principle and beneficial effects of the above technical solution are as follows: the collar 2 can slide up and down along the lifting rod 7, driving the moving ring 6 and the limiting component 5 to move synchronously; positioning pins can be inserted into the positioning hole 1 21 and positioning hole 22, thereby adjusting the installation height of the limiting component 5 on the lifting rod 7. The height of the limiting component 5 can be adjusted with the collar 2, which can be adapted to different lengths of slings 9, ensuring that the limiting point always acts on the effective position of the sling 9, improving accuracy and safety.

[0046] Example 5

[0047] Based on the above embodiment 4, such as Figures 5-6 As shown, the limiting component 5 includes an irregularly shaped fixing block 23, which is fixedly connected to the moving ring 6. The other end of the irregularly shaped fixing block 23 is fixedly connected to a U-shaped plate 41. A connecting rod 24 is provided inside the U-shaped plate 41. A buffer rod 39 is slidably provided on the connecting rod 24. A spring 40 is symmetrically fixed on the buffer rod 39 and is sleeved on the connecting rod 24.

[0048] The other end of the buffer rod 39 is fixedly connected to a U-shaped frame 38. A buffer plate 37 is slidably arranged inside the U-shaped frame 38. A guide rod 43 is slidably arranged through the buffer plate 37. The guide rod 43 is fixedly connected to the U-shaped frame 38. A spring 42 is sleeved on the guide rod 43. One end of the spring 42 is fixedly connected to the buffer plate 37, and the other end of the spring 42 is fixedly connected to the U-shaped frame 38.

[0049] Preferably, the U-shaped frame 38 is symmetrically fixed with protruding plates 35, and a rotating block 27 is rotatably arranged on one side of the protruding plates 35 that are close to each other. A fixing rod 36 is symmetrically fixed on the rotating block 27, and a rotating wheel 26 is rotatably installed on the fixing rod 36. The rotating wheel 26 is in contact with the buffer plate 37.

[0050] Preferably, a bidirectional threaded rod 33 is rotatably provided at the eccentric position of the rotating block 27. The two ends of the bidirectional threaded rod 33 are rotatably connected to U-shaped plates 28. L-shaped moving blocks 29 are symmetrically threaded on the bidirectional threaded rod 33. A sliding groove is provided on the U-shaped plate 28. The L-shaped moving blocks 29 slide out of the U-shaped plate 28 from the sliding groove. A connecting rod 30 is fixedly provided on the side of the L-shaped moving blocks 29 that are close to each other. An arc plate 32 is fixedly provided on the connecting rod 30. A plug-in block 31 is fixed on one of the arc plates 32, and a plug-in groove is provided on the other arc plate 32. The plug-in block 31 cooperates with the plug-in groove.

[0051] Among them, a U-shaped plate 28 extends rotatably from the front side of the bidirectional threaded rod 33, and a rotating wheel 34 is fixedly connected to the front side of the bidirectional threaded rod 33.

[0052] The working principle and beneficial effects of the above technical solution are as follows: By rotating the rotating wheel 34, the rotating wheel 34 drives the bidirectional threaded rod 33 to rotate. The two L-shaped moving blocks 29 will move towards each other along the sliding groove of the U-shaped plate 3 28. The L-shaped moving blocks 29 drive the connecting rod 30 and the arc plate 32 to move. Through the cooperation of the plug block 31 and the plug groove, the two arc plates 32 can tightly fit the slings 9 of different diameters to achieve clamping of the slings 9. When the slings 9 swing, the slings 9 will drive the rotating block 27 to rotate. The rotating block 27 drives one of the rotating wheels 26 to contact the buffer plate 37. The spring 3 42 is compressed or stretched. Through elastic deformation, it absorbs the kinetic energy generated by the swing of the slings 9 and reduces the swing amplitude. At the same time, the force will be transmitted to the buffer rod 39 through the U-shaped frame 38. The buffer rod 39 slides on the connecting rod 24 and drives the spring 2 40 to work together to further enhance the buffering effect.

[0053] The double spring buffer structure (spring 2 40, spring 3 42) combined with the buffer plate 37 and buffer rod 39 can quickly absorb the energy of the swing of the sling 9, further reducing the risk of the crankshaft red sleeve 3 falling and improving the stability during the hoisting process; the bidirectional threaded rod 33 drives the arc plate 32 to open and close, which can be adapted to slings 9 of different diameters, making it more adaptable.

[0054] Example 6

[0055] Based on the above embodiment 5, such as Figures 7-8 As shown, a through groove 25 is provided on the front side of the U-shaped plate 41, and a movable box 51 is slidably arranged in the through groove 25. The front side of the connecting rod 24 is fixedly connected to the movable box 51, and a sliding plate is fixedly arranged on the rear side of the connecting rod 24. The sliding plate is slidably connected to the U-shaped plate 41. The front spring 40 is fixedly connected to the movable box 51, and the rear spring 40 is fixedly connected to the sliding plate.

[0056] The front side of the mobile box 51 is fixedly connected to the positioning plate 45. The positioning plate 45 is symmetrically and slidably provided with positioning rods 48. The front side of the U-shaped plate 41 is provided with several left and right symmetrical rows of positioning holes 44. The positioning rods 48 cooperate with the positioning holes 44.

[0057] Preferably, a drive plate 46 is provided on the front side of the positioning plate 45, and a drive rod 47 is fixedly provided on the drive plate 46. The drive rod 47 slides into the movable box 51. A spring plate 50 is slidably provided in the movable box 51. The spring plate 50 is fixedly connected to the drive rod 47. A spring 49 is sleeved on the drive rod 47. One end of the spring 49 is fixedly connected to the spring plate 50, and the other end of the spring 49 is fixedly connected to the movable box 51. The positioning rod 48 is fixedly connected to the drive plate 46.

[0058] The working principle and beneficial effects of the above technical solution are as follows: Pulling the drive plate 46 forward causes the positioning rod 48 to leave the position of the positioning hole 44. Then, the drive plate 46 moves up or down, causing the moving box 51 to move. The moving box 51 then moves the connecting rod 24, thereby adjusting the contact position between the arc plate 32 and the sling 9. Then, the drive plate 46 is released, and under the action of the spring 49, the positioning rod 48 will be reinserted into different positioning holes 44, thus completing the position adjustment of the arc plate 32.

[0059] The position of the arc plate 32 can be adjusted within the full height range of the lifting rod 7 by moving the drive plate 46 and the moving ring 6. It can be adapted to various lengths of slings, so that the limiting point always acts on the "golden position" where the sling 9 swings most violently (such as the upper middle part of the long sling and the lower end of the short sling), with good limiting effect and stronger practicality.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A marine crankshaft lifting platform with self-locking function, characterized in that, Includes a base plate (1), a lifting box (4) is provided on the base plate (1), a lifting rod (7) is installed on the lifting box (4), a top plate (8) is provided at the upper end of the lifting rod (7), a number of slings (9) are provided on the lower surface of the top plate (8), a hoisting mechanism (10) is provided at the lower end of the slings (9), the hoisting mechanism (10) is used to hoist the crankshaft sleeve (3), a self-locking component is also provided on the lifting box (4), the self-locking component is used to restrict the movement of the lifting rod (7), a limit component (5) is also provided on the lifting rod (7), the limit component (5) is used to restrict the swing of the slings (9); A drive motor (11) is fixedly installed on the lower inner wall of the lifting box (4). A threaded rod (15) is fixedly connected to the upper output end of the drive motor (11). A movable plate (12) is threadedly connected to the threaded rod (15). The movable plate (12) is slidably connected to the inner wall of the lifting box (4). A lifting rod (7) is installed on the movable plate (12). The lifting rod (7) slides upward out of the lifting box (4). A cavity is provided inside the lifting rod (7). The threaded rod (15) extends into the cavity. A rotating plate (16) is fixedly connected to the upper end of the threaded rod (15). The rotating plate (16) is slidably connected to the cavity. The self-locking assembly includes left and right symmetrical moving rods (19), and through slots are provided on the left and right side walls of the lifting box (4). The moving plate (12) extends out of the lifting box (4) from the through slots. The moving plate (12) is fixedly connected to the moving rod (19), and several triangular blocks (13) are fixedly installed on the moving rod (19). U-shaped plates (17) are fixedly installed on the left and right side walls of the lifting box (4). Several through slots are opened on the U-shaped plates (17). A self-locking rod (20) is slidably installed in the through slots. A disc (14) is fixedly installed on the front and rear sides of the self-locking rod (20). A spring (18) is fixedly installed in the through slots. The spring (18) is fixedly connected to the self-locking rod (20). The self-locking rod (20) cooperates with the triangular block (13). A collar (2) is slidably provided on the lifting rod (7). A movable ring (6) is fixedly connected to the upper end of the collar (2). Limiting components (5) are symmetrically provided on the movable ring (6). A positioning hole (21) is opened on the collar (2), and a positioning hole (22) is opened on the lifting rod (7). The limiting component (5) includes an irregularly shaped fixing block (23), which is fixedly connected to the moving ring (6). The other end of the irregularly shaped fixing block (23) is fixedly connected to a U-shaped plate (41). A connecting rod (24) is provided inside the U-shaped plate (41). A buffer rod (39) is slidably provided on the connecting rod (24). A spring (40) is symmetrically fixed on the buffer rod (39). The spring (40) is sleeved on the connecting rod (24). The other end of the buffer rod (39) is fixedly connected to a U-shaped frame (38). A buffer plate (37) is slidably arranged inside the U-shaped frame (38). A guide rod (43) is slidably arranged through the buffer plate (37). The guide rod (43) is fixedly connected to the U-shaped frame (38). A spring three (42) is sleeved on the guide rod (43). One end of the spring three (42) is fixedly connected to the buffer plate (37), and the other end of the spring three (42) is fixedly connected to the U-shaped frame (38).

2. The marine crankshaft lifting platform with self-locking function according to claim 1, characterized in that, A protruding plate (35) is symmetrically fixed on the U-shaped frame (38). A rotating block (27) is rotatably fixed on one side of the protruding plate (35) that is close to each other. A fixing rod (36) is symmetrically fixed on the rotating block (27). A rotating wheel (26) is rotatably installed on the fixing rod (36). The rotating wheel (26) is in contact with the buffer plate (37).

3. A marine crankshaft lifting platform with self-locking function according to claim 2, characterized in that, A bidirectional threaded rod (33) is rotatably connected to the eccentric position of the rotating block (27). The two ends of the bidirectional threaded rod (33) are rotatably connected to a U-shaped plate (28). An L-shaped moving block (29) is symmetrically threaded on the bidirectional threaded rod (33). A sliding groove is provided on the U-shaped plate (28). The L-shaped moving block (29) slides out of the U-shaped plate (28) from the sliding groove. A connecting rod (30) is fixedly provided on the side of the L-shaped moving blocks (29) that are close to each other. An arc plate (32) is fixedly provided on the connecting rod (30). A plug-in block (31) is fixed on one of the arc plates (32). A plug-in groove is provided on the other arc plate (32). The plug-in block (31) cooperates with the plug-in groove.

4. A marine crankshaft lifting platform with self-locking function according to claim 1, characterized in that, A through groove (25) is provided on the front side of the second U-shaped plate (41). A movable box (51) is slidably arranged in the through groove (25). The front side of the connecting rod (24) is fixedly connected to the movable box (51). A sliding plate is fixedly arranged on the rear side of the connecting rod (24). The sliding plate is slidably connected to the second U-shaped plate (41). The second spring (40) on the front side is fixedly connected to the movable box (51). The second spring (40) on the rear side is fixedly connected to the sliding plate. The front side of the mobile box (51) is fixedly connected to the positioning plate (45), and the positioning plate (45) is symmetrically and slidably provided with positioning rods (48). The front side of the U-shaped plate (41) is provided with several left and right symmetrical two rows of positioning holes (44), and the positioning rods (48) cooperate with the positioning holes (44).

5. A marine crankshaft lifting platform with self-locking function according to claim 4, characterized in that, A drive plate (46) is provided on the front side of the positioning plate (45). A drive rod (47) is fixedly provided on the drive plate (46). The drive rod (47) slides into the movable box (51). A spring plate (50) is slidably provided in the movable box (51). The spring plate (50) is fixedly connected to the drive rod (47). A spring four (49) is sleeved on the drive rod (47). One end of the spring four (49) is fixedly connected to the spring plate (50). The other end of the spring four (49) is fixedly connected to the movable box (51). The positioning rod (48) is fixedly connected to the drive plate (46).

Images