Support structure for assisting propeller in overturning
By using the sliding sleeve and locking block structure of the limiting component, the problem of wear on the limiting block during propeller reversal is solved, achieving safe and reliable propeller reversal and long service life of the bracket.
Patent Information
- Application Number
- CN202520805515.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-25
AI Technical Summary
In the existing technology, the threaded connection between the limiting block and the bracket is prone to wear during the tumbling process of large marine propellers, resulting in stripping of the threads, which affects safety and the service life of the bracket.
The limiting components include a sliding sleeve and a locking block structure. The locking block is quickly fixed to the slot through a displacement mechanism, which avoids slippage and extends the life of the bracket.
It improves the safety of the propeller reversal process and the service life of the bracket, reduces the wear of the limit block and the bracket threads, and avoids the phenomenon of stripping threads.
Smart Images
Figure CN223963077U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of propeller processing technology, and more specifically, to a support structure for assisting propeller rotation. Background Technology
[0002] Large marine propellers have a large tonnage, so they generally need to be lifted by cranes and slings and repeatedly turned over to meet the requirements of the assembly process. In this process, multiple cranes need to work together to achieve the up-and-down turning of the propeller.
[0003] In existing technologies, when using a crane to lift a large marine propeller, the large marine propeller is usually fixed on a vertically placed cylindrical support. The support has lifting holes near both ends for hooking the crane hook. After the crane hook hooks into the lifting holes, the support can be lifted upwards. After using two cranes to lift both ends of the support, the position of the crane hooks and the support is adjusted in the air until the upper and lower ends of the support are reversed. This completes the flipping of the large marine propeller, avoiding the phenomenon of the large marine propeller colliding with hard objects due to poor stability during the flipping process, or the phenomenon of interference between the crane straps and the propeller.
[0004] A common method for fixing a propeller to a bracket involves installing limiting blocks on both the upper and lower sides of the propeller after the propeller is fitted onto the bracket. These limiting blocks restrict the propeller's movement along the bracket's axis, thus securing the propeller. In existing technology, the limiting blocks are typically threaded onto the bracket, and then a crane lifts the bracket and propeller together. The limiting block located below the propeller is then subjected to the propeller's own weight, causing the propeller to press the lower limiting block downwards, resulting in... The threads on the limit block and bracket wear out rapidly. Furthermore, during the installation and removal of the propeller from the bracket, workers need to twist the limit block. This twisting causes relative rotation between the limit block and the bracket, further wear down the threads and shortens the bracket's lifespan. Severe friction between the threads can lead to stripping of the limit block, causing the bracket to lose its ability to secure the propeller. If stripping occurs during propeller hoisting, the propeller may fall, endangering workers' lives. Utility Model Content
[0005] The purpose of this invention is to provide a support structure for assisting propeller rotation, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides a support structure for assisting propeller rotation, including a vertical pole. Lifting holes are provided on the sidewalls of the vertical pole near both ends. Two limiting components are symmetrically arranged on the vertical pole between the two lifting holes. Each limiting component includes a movable sleeve and a pad sleeve that are slidably fitted onto the vertical pole. The pad sleeve is fixed to the movable sleeve near the middle of the vertical pole by bolts. Two mating grooves are symmetrically formed on the movable sleeve. A locking block is horizontally slidably arranged inside each mating groove. The two locking blocks are symmetrically arranged about the axis of the movable sleeve. A locking groove is formed on the vertical pole at a position corresponding to the two mating grooves. One end of each locking block near the axis of the vertical pole is inserted into the locking groove. A displacement mechanism is provided on the movable sleeve to drive the two locking blocks to move relative to each other.
[0007] As a further improvement to this technical solution, the displacement mechanism includes two elliptical disks that are horizontally rotatably sleeved on the circumferential sidewall of the movable sleeve. A connecting rod is fixed at the protruding end of the major axis of the two elliptical disks. The end of the locking block away from the axis of the upright extends to the outside of the mating groove and is fixedly provided with an end plate. The locking block is arranged in sliding contact with the sidewall between the two elliptical disks and between the two elliptical disks. The arc-shaped outer sidewall of the elliptical disk is in sliding contact with the side of the end plate near the axis of the upright.
[0008] As a further improvement to this technical solution, the displacement mechanism also includes symmetrically formed inner grooves on the upper and lower side walls of the card block. Positioning plates are fixedly provided on the top and bottom surfaces of the card grooves near both ends. The four positioning plates are respectively set in the four inner grooves. A spring is fixedly provided between the side of the positioning plate away from the axis of the upright and the inner wall of the corresponding inner groove. The spring drives the card block to move closer to the axis of the upright.
[0009] As a further improvement to this technical solution, the displacement mechanism also includes a strap fixedly mounted on the connecting rod, with a locking hook fixedly mounted on the other end of the strap. A hook groove adapted to the locking hook is provided on one side of the locking block near the end plate. When the connecting rod rotates to the position of contacting the corresponding end plate, the locking hook is engaged in the corresponding hook groove.
[0010] As a further improvement to this technical solution, two guide grooves are symmetrically opened near both ends of the upright, and two protrusions are symmetrically fixed on the inner circumference of the movable sleeve, with the two protrusions slidably disposed inside the corresponding two guide grooves.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. This support structure for assisting propeller rotation involves placing the movable sleeve and pad on the upright. Then, the worker inserts and fixes the locking block on the movable sleeve into the corresponding slot through the displacement mechanism, thus fixing the movable sleeve and pad to the upright. Compared with the existing technology that fixes the movable sleeve to the upright with threads, this avoids the movable sleeve becoming unusable due to stripped internal threads, thus extending the service life of the support.
[0013] 2. The bracket structure used to assist propeller rotation, after the mating groove on the movable sleeve is connected with the corresponding slot, the worker takes out the locking hook from the corresponding hook slot, holds the connecting rod and rotates the elliptical disk, so that the spring pulls the corresponding end plate and the locking block towards the axis of the upright, so that the locking block is inserted and fixed in the corresponding slot. In this way, the corresponding limiting component is quickly fixed on the upright through the cooperation of the locking block and the slot. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the upright pole of this utility model;
[0017] Figure 4 This is a schematic diagram of the overall structure of the limiting component of this utility model;
[0018] Figure 5 This is one of the partial structural schematic diagrams of the limiting component of this utility model;
[0019] Figure 6 This is an exploded view of a portion of the limiting component of this utility model;
[0020] Figure 7 This is the second partial structural schematic diagram of the limiting component of this utility model.
[0021] The meanings of the labels in the diagram are as follows:
[0022] 1. Upright pole; 11. Lifting hole; 12. Slot; 13. Positioning plate; 14. Guide groove;
[0023] 2. Limiting component; 21. Moving sleeve; 211. Protrusion; 212. Mating groove; 22. Pad; 23. Locking block; 231. Embedded groove; 232. Hook groove; 24. End plate; 25. Elliptical disc; 26. Connecting rod; 27. Strap; 28. Locking hook; 29. Spring. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Example 1
[0026] Please see Figure 1 As shown, one of the objectives of this embodiment is to provide a support structure for assisting propeller rotation, including a support rod 1. Lifting holes 11 are provided on the side wall of the support rod 1 near both ends. Two limiting components 2 are symmetrically arranged on the support rod 1 between the two lifting holes 11. The two limiting components 2 are used to limit the position of the large propeller on the support rod 1. The structure of the limiting components 2 is detailed below, referring to... Figures 2-4 The limiting component 2 includes a movable sleeve 21 and a pad sleeve 22 that are slidably sleeved on the upright 1. The pad sleeve 22 is fixedly installed on the side of the movable sleeve 21 near the middle of the upright 1 by bolts. The pad sleeve 22 is made of metal and has a rubber pad installed on its surface. The pad sleeve 22 replaces the movable sleeve 21 in contact with the propeller, preventing the movable sleeve 21 from scratching the propeller. Several claw grooves adapted to the grippers of the hoisting equipment are opened on the outer circumference of the movable sleeve 21 away from the pad sleeve 22, so as to facilitate the workers to use the grippers of the hoisting equipment to lift the propeller. The limiting component 2 has two mating grooves 212 symmetrically opened on the movable sleeve 21. The mating grooves 212 are horizontally slidably arranged with a locking block 23 inside. The two locking blocks 23 are symmetrically arranged with the axis of the movable sleeve 21 as the center. The upright 1 has a locking groove 12 at the position corresponding to the two mating grooves 212. The end of the locking block 23 near the axis of the upright 1 is inserted into the inside of the locking groove 12. The locking block 23 and the locking groove 12 cooperate to limit the position of the movable sleeve 21 on the upright 1, thereby fixing the limiting component 2 on the upright 1.
[0027] When using this support, the worker first uses a hoisting device to lift one of the limiting components 2 onto several pads, so that the lower side wall of the movable sleeve 21 contacts the upper side wall of the pad, and the internal space of the movable sleeve 21 is suspended. The worker then hooks the hook of the hoisting device onto one of the lifting holes 11 on the upright 1, and lifts the upright 1 into the air, so that the upright 1 passes through the internal space of the movable sleeve 21. The height of the pad corresponds to the distance between the slot 12 and the end of the upright 1. When the lower end of the upright 1 touches the ground, the slot 12 on the upright 1 connects with the mating groove 212 on the movable sleeve 21. The worker inserts the locking block 23 into the corresponding mating groove 212 to fix the upright 1 inside the movable sleeve 21, and places the upright 1 vertically on the ground. Then, the worker disengages the hook of the hoisting device from the lifting hole 11. Workers use hoisting equipment to lift the large propeller to be flipped, so that the shaft groove on the large propeller for installing the propeller shaft is fitted from top to bottom onto the outside of the upright 1 until the lower side wall of the large propeller contacts the upper side wall of the pad 22. The large propeller is then placed stably on the upright 1. Workers then use hoisting equipment to lift another limiting component 2 to the outside of the upright 1, so that the mating groove 212 on the upper movable sleeve 21 and the upper locking groove 12 are mated. Workers then insert the upper locking block 23 into the corresponding mating groove 212, fixing the upper limiting component 2 to the upright 1. The distance between the two pads 22 fixed on the upright 1 corresponds to the thickness of the large propeller, so the upper pad 22 contacts the upper side wall of the large propeller. The two limiting components 2 clamp and fix the large propeller to the upright 1.
[0028] The worker controls a hoisting device to hook the hook at the upper lifting hole 11, using this device to lift the upright 1, two limiting components 2, and the large propeller into the air. The worker then uses another hoisting device to hook the hook at the lower lifting hole 11, using this device to lift the other end of the upright 1 to a higher position, causing the upright 1, two limiting components 2, and the large propeller to flip in the air until both ends of the upright 1 are upside down. The worker then uses the hoisting device to place the lower movable sleeve 21 on several pads, making the upright 1 vertically placed on the ground. After the worker removes the upper locking block 23 from the corresponding slot 12, the worker uses the hoisting device to remove the upper limiting component 2 from the upright 1. Finally, the worker uses the hoisting device to remove the large propeller from the upright 1, thus completing the flipping of the large propeller.
[0029] To facilitate the worker's hoisting of the mating groove 212 on the movable sleeve 21 to the position communicating with the slot 12, two guide grooves 14 are symmetrically opened near both ends of the upright 1. Two protrusions 211 are symmetrically fixed on the inner circumference of the movable sleeve 21, and the two protrusions 211 are slidably disposed in the corresponding two guide grooves 14. After the worker uses the hoisting equipment to hoist the upright 1 above the movable sleeve 21, the position of the upright 1 is first adjusted so that the position of the protrusions 211 corresponds to the position of the guide grooves 14. Then the worker controls the hoisting equipment to lower the upright 1 so that the protrusions 211 correspond to the positions of the guide grooves 14. 211 is inserted into the corresponding guide groove 14. The protrusion 211 and the guide groove 14 restrict the movable sleeve 21 from rotating around its own axis during the downward movement. This ensures that the mating groove 212 and the corresponding slot 12 are connected after the lower end of the upright 1 touches the ground. Similarly, when the worker hoists another limiting component 2 to the upper side of the propeller, by inserting the protrusion 211 on the upper movable sleeve 21 into the corresponding guide groove 14, the upper pad 22 can be connected to the upper mating groove 212 and the corresponding slot 12 after it contacts the upper side wall of the propeller.
[0030] To facilitate the insertion and fixing of the locking blocks 23 into the corresponding slots 12, a displacement mechanism is provided on the movable sleeve 21 to drive the two locking blocks 23 to move relative to each other. The structure of the displacement mechanism is detailed below, refer to... Figures 5-7 The displacement mechanism includes symmetrically arranged inner grooves 231 on the upper and lower side walls of the locking block 23. Positioning plates 13 are fixedly arranged on the top and bottom surfaces of the locking groove 12 near both ends. The four positioning plates 13 are respectively arranged in the four inner grooves 231. A spring 29 is fixedly arranged between the side of the positioning plate 13 away from the axis of the upright 1 and the inner wall of the corresponding inner groove 231. The spring 29 drives the locking block 23 to approach the axis of the upright 1. The spring 29 fixes the locking block 23 in the corresponding mating groove 212, preventing the locking block 23 from falling out of the corresponding mating groove 212 during the rotation of the upright 1.
[0031] The displacement mechanism also includes two horizontally rotating elliptical disks 25 mounted on the circumferential sidewalls of the movable sleeve 21. Connecting rods 26 are fixed to the protruding ends of the major axes of the two elliptical disks 25. A locking block 23 extends from the axis of the upright 1 to the outside of the mating groove 212 and is fixedly fitted with an end plate 24. The locking block 23 is positioned in sliding contact between the two elliptical disks 25 and the sidewalls of the two elliptical disks 25. The arc-shaped outer sidewall of the elliptical disk 25 slides in contact with the side of the end plate 24 near the axis of the upright 1. When the locking block 23 is in its initial state, the end plate 24 contacts the protruding end of the elliptical disk 25 along its minor axis. It should be noted that the protruding ends of the major and minor axes are the four vertices of the ellipse. The end of the locking block 23 near the axis of the upright 1 is located inside the movable sleeve 21. When the worker holds one of the connecting rods 26... When the two elliptical disks 25 are rotated, and the protruding end of the circumferential sidewall of the elliptical disk 25 in the direction of the long axis approaches the mating end plate 24, the elliptical disk 25 pushes the end plate 24 and the locking block 23 away from the axis of the upright 1. The spring 29 is elastically stretched. When the connecting rod 26 rotates to the position of contacting the corresponding end plate 24, the end plate 24 blocks the connecting rod 26 and the elliptical disk 25 from continuing to rotate. The protruding end of the elliptical disk 25 in the direction of the long axis cannot continue to approach the end plate 24. At this time, the distance between the protruding end of the elliptical disk 25 in the direction of the long axis and the end plate 24 reaches the shortest, the distance between the locking block 23 and the axis of the upright 1 reaches the maximum, the elastic stretch of the spring 29 reaches the maximum, and the end of the locking block 23 near the axis of the upright 1 is completely inserted into the corresponding mating groove 212. The locking block 23 will not block the moving sleeve 21 from being fitted on the outside of the upright 1.
[0032] To fix the end of the locking block 23 near the axis of the upright 1 inside the corresponding mating groove 212, the displacement mechanism also includes a strap 27 fixedly mounted on the connecting rod 26. The strap 27 is made of nylon, and a locking hook 28 is fixedly mounted on the other end of the strap 27. A hook groove 232 adapted to the locking hook 28 is opened on one side of the locking block 23 near the end plate 24. When the connecting rod 26 rotates to the position of contacting the corresponding end plate 24, the worker hooks the locking hook 28 into the corresponding hook groove 232, thereby fixing the connecting rod 26 and the corresponding end plate 24 together. After the worker releases the connecting rod 26, the connecting rod 26 prevents the elliptical disk 25 from rotating. The elliptical disc 25 prevents the spring 29 from pulling the end plate 24 towards the axis of the upright 1, thus preventing the spring 29 from rebounding. When the worker puts the movable sleeve 21 on the outside of the upright 1, so that the mating groove 212 is connected with the corresponding slot 12, the worker takes the locking hook 28 out of the corresponding hook groove 232, then holds the connecting rod 26 and rotates the elliptical disc 25, so that the protruding end of the elliptical disc 25 in the long axis direction moves away from the end plate 24. This allows the rebounding spring 29 to pull the corresponding end plate 24 and the locking block 23 towards the axis of the upright 1 until the locking block 23 is inserted into the corresponding slot 12, thus fixing the corresponding limiting component 2 on the upright 1.
[0033] It is worth noting that when the pole 1 is in a vertical position, the worker can stand on the lifting platform above the ground to perform the above operations on the upper limit component 2, thus avoiding the situation where the upper limit component 2 is too high for the worker to reach.
[0034] When the device uses the displacement mechanism to fix the corresponding limiting component 2 onto the upright 1, the worker first holds one of the connecting rods 26 and simultaneously rotates the two elliptical disks 25 until the connecting rod 26 rotates to the position where it contacts the corresponding end plate 24. At this time, the distance between the protruding end of the elliptical disk 25 along its long axis and the end plate 24 is at its shortest, the distance between the locking block 23 and the axis of the upright 1 is at its maximum, the elastic extension of the spring 29 is at its maximum, and the end of the locking block 23 near the axis of the upright 1 is fully inserted into the corresponding mating groove 212. The locking block 23 will not obstruct the moving sleeve 21 from being fitted onto the outside of the upright 1. The worker then... The locking hook 28 is hooked into the corresponding hook groove 232. The connecting rod 26 and the corresponding end plate 24 are fixed together by the strap 27. Then the worker puts the moving sleeve 21 and the pad 22 onto the upright 1 until the mating groove 212 is connected to the corresponding slot 12. The worker then takes the locking hook 28 out of the corresponding hook groove 232, holds the connecting rod 26 and rotates the elliptical disk 25. This causes the spring 29 to pull the corresponding end plate 24 and the locking block 23 toward the axis of the upright 1, so that the locking block 23 is inserted into the corresponding slot 12, thereby fixing the corresponding limiting component 2 onto the upright 1.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A support structure for assisting propeller turning, comprising a vertical pole (1), the side wall of which is provided with a lifting hole (11) near both ends, characterized in that: Two limiting assemblies (2) are symmetrically arranged on the vertical rod (1) at a position between two lifting holes (11), the limiting assembly (2) comprises a moving sleeve (21) and a pad sleeve (22), the pad sleeve (22) is fixedly arranged on the moving sleeve (21) at a side close to the middle position of the vertical rod (1), two symmetrical opposing slots (212) are formed in the moving sleeve (21), a clamping block (23) is horizontally slidably arranged in the opposing slot (212), the two clamping blocks (23) are symmetrically arranged with the axis of the moving sleeve (21) as the center, a clamping groove (12) is formed in the vertical rod (1) at a position corresponding to the two opposing slots (212), and one end of the clamping block (23) close to the axis of the vertical rod (1) is inserted into the clamping groove (12).
2. The cradle structure for assisting propeller roll-over according to claim 1, characterized in that: The displacement mechanism comprises two elliptical discs (25) which are horizontally rotatably arranged on the circumferential side wall of the moving sleeve (21), the long axis protruding end of the two elliptical discs (25) is fixedly provided with a connecting rod (26), one end of the clamping block (23) away from the axis of the vertical rod (1) extends to the outside of the opposing slot (212) and is fixedly provided with an end plate (24), the clamping block (23) is arranged between the two elliptical discs (25) and the side wall between the two elliptical discs (25) is in sliding contact, and the arc-shaped outer side wall of the elliptical disc (25) is in sliding contact with the side of the end plate (24) close to the axis of the vertical rod (1).
3. The cradle structure for assisting propeller roll-over according to claim 1, characterized in that: The displacement mechanism further comprises an embedded groove (231) symmetrically formed on the upper side wall and the lower side wall of the clamping block (23), the top surface and the bottom surface of the clamping groove (12) are fixedly provided with a positioning plate (13) at positions close to the two ends, four positioning plates (13) are arranged in the four embedded grooves (231) respectively, a spring (29) is fixedly arranged between the side of the positioning plate (13) away from the axis of the vertical rod (1) and the inner wall of the corresponding embedded groove (231), and the spring (29) drives the clamping block (23) to be close to the axis of the vertical rod (1).
4. The bracket structure for assisting propeller flip over according to claim 2, characterized in that: The displacement mechanism further comprises a bandage (27) fixedly arranged on the connecting rod (26), the other end of the bandage (27) is fixedly provided with a lock hook (28), a hook groove (232) adapted to the lock hook (28) is formed in the side of the clamping block (23) close to the end plate (24), and when the connecting rod (26) is rotated to a position in contact with the corresponding end plate (24), the lock hook (28) is hooked in the corresponding hook groove (232).
5. The bracket structure for assisting propeller flip over according to claim 1, characterized in that: Two guide grooves (14) are symmetrically formed on the vertical rod (1) at positions close to the two ends, and two protrusions (211) are fixedly arranged on the circumferential inner wall of the moving sleeve (21), and the two protrusions (211) are slidably arranged in the corresponding two guide grooves (14) respectively.