A marine stern work platform

Abstract

The application relates to a ship stern operation platform, which comprises a base, a base guide rail arranged on the base, a middle base capable of moving along the base guide rail, two groups of symmetrical middle base guide rails arranged on the middle base, left and right bracket systems capable of moving along the middle base guide rails and arranged on the middle base guide rails, left and right lifting devices arranged in the left and right bracket systems, respectively, and left and right bracket moving devices arranged below the left and right bracket systems, respectively; one lifting device and one rotating device are arranged at each corner of the base to drive the base to perform lifting and moving motions; lifting fine adjustment devices matched with the lifting devices are arranged on the two sides of the base to fine adjust the lifting motion of the base. When used, for the flush stern, the rudder blade and the propeller can be installed, and for the rudder blade with the balance wing, three-point support can be provided; after installation, the operation platform can be conveniently and quickly removed, the operation is convenient and safe, the work efficiency is improved, and the manpower and material resources are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shipbuilding, in particular to a stern work platform for ships, and more particularly to a stern work platform for installing large propellers or rudder blades of ships. BACKGROUND

[0002] At present, in the process of installing rudder blades and propellers, the shipbuilding industry has gradually abandoned the traditional process method of using hoists, rigging, clamps and other tools, and instead uses a unified platform to achieve high-precision installation of rudder blades and propellers, which has given rise to some new stern work platforms. However, with the diversification of ship types, there are sometimes recessed installation spaces in the stern, and sometimes there are no recessed installation spaces (i.e., flush sterns), and the existing various stern work platforms cannot meet the work requirements of flush sterns due to insufficient structural design, which is manifested in that the stern work platform cannot be further advanced after approaching the flush stern, so that the propeller / rudder blade cannot be smoothly sent to the front end of the installation shaft.

[0003] For rudder blades with balance wings, the traditional rudder blade installation platform cannot provide three-point support. At the same time, after the completion of installation, the traditional propeller installation platform must be changed in direction to be completely withdrawn in order to prevent interference between the bracket and the blade.

[0004] Therefore, how to design a universal stern work platform to adapt to diversified stern installation environments is a problem that technicians in the field need to solve. SUMMARY

[0005] The purpose of the present application is to provide an improved stern work platform for ships, which, through structural improvement, can install rudder blades and propellers for flush sterns, provide three-point support for rudder blades with balance wings, and conveniently and quickly withdraw the work platform after installation.

[0006] In order to achieve the above purpose, the technical solution of the present application is as follows: a stern work platform for ships, characterized in that the work platform comprises a base, the base is provided with a base guide rail and a middle seat movable along the base guide rail, the middle seat is provided with two groups of symmetrically arranged middle seat guide rails, the middle seat guide rails are respectively provided with left and right bracket systems movable along the middle seat guide rails, the left and right bracket systems are respectively provided with left and right lifting devices in the middle, and the left and right bracket systems are respectively provided with left and right bracket moving devices at the bottom; each corner of the base is respectively provided with a lifting device and a rotating device to drive the base to move up and down and move; the two sides of the base are respectively provided with lifting fine adjustment devices matched with the lifting devices to fine adjust the lifting movement of the base.

[0007] Preferably, the left bracket system comprises a left bracket upper seat, a left bracket middle seat and a left bracket lower seat, the left bracket upper seat and the left bracket middle seat are connected to two ends of a left bracket middle seat oil cylinder respectively, the left bracket lifting device comprises a left bracket lifting oil cylinder, the left bracket lifting oil cylinder is fixedly connected to the left bracket base, the left bracket moving device comprises a left bracket oil cylinder, a left bracket pushing block matched with the left bracket oil cylinder and a left bracket sliding block fixedly connected to the left bracket pushing block, the left bracket sliding block is movably connected to the middle seat guide rail.

[0008] Further, the left bracket upper seat is movably connected to the left bracket middle seat, the bottom of the left bracket upper seat is provided with a pulley, the left bracket upper seat is connected to the output end of the left bracket middle seat oil cylinder, the left bracket middle seat is connected to the fixed end of the left bracket middle seat oil cylinder, and the lower portion of the left bracket base is provided with a left bracket pull rope displacement sensor for detecting the moving displacement value of the left bracket upper seat.

[0009] Preferably, the right bracket system comprises a right bracket upper seat, a right bracket middle seat and a right bracket lower seat, the right bracket upper seat and the right bracket middle seat are connected to two ends of a right bracket middle seat oil cylinder respectively, the right bracket lifting device comprises a right bracket lifting oil cylinder, the right bracket lifting oil cylinder is fixedly connected to the right bracket base, the right bracket moving device comprises a right bracket oil cylinder, a right bracket pushing block matched with the right bracket oil cylinder and a right bracket sliding block fixedly connected to the right bracket pushing block, the right bracket sliding block is movably connected to the middle seat guide rail.

[0010] Further, the right bracket upper seat is movably connected to the right bracket middle seat, the bottom of the right bracket upper seat is provided with a pulley, the right bracket upper seat is connected to the output end of the right bracket middle seat oil cylinder, the right bracket middle seat is connected to the fixed end of the right bracket middle seat oil cylinder, and the lower portion of the right bracket base is provided with a right bracket pull rope displacement sensor for detecting the moving displacement value of the right bracket upper seat.

[0011] Further, the lifting device comprises a lifting box and a lifting box oil cylinder arranged in the lifting box, the lifting box base is fixedly connected to the base, the lifting box oil cylinder is connected to a lifting box displacement sensor module arranged below the lifting box through a rack, a rotating device is arranged below the lifting box displacement sensor module, and the rotating device is a lifting box rotating module.

[0012] Further, the lifting box displacement sensor module comprises a gear base, a gear matched with the rack is arranged in the gear base, an angle encoder is fixedly connected to the rotating shaft of the gear, and a disc spring for adjusting the engagement tightness of the gear and the rack is arranged in the gear base; the lifting box rotating module comprises a wheel base, a motor is arranged on one side of the wheel base, a roller is arranged in the wheel base, and the output end of the motor is connected to the rotating shaft of the roller.

[0013] Compared with the prior art, the technical scheme of the present application not only improves the overall technical scheme, but also improves many details, and specifically has the following beneficial effects:

[0014] 1. The improvement scheme, the base is equipped with base guide rail and the middle seat that can move along the base guide rail, the middle seat is equipped with two groups of symmetrically arranged middle seat guide rail, the middle seat guide rail is equipped with the left and right bracket system that can move along the middle seat guide rail respectively, the left and right bracket system is equipped with left and right lifting devices respectively, the left and right bracket system is equipped with left and right bracket moving device respectively, the left and right bracket are supported to marine propeller or marine rudder piece, and through the movement of the left and right bracket, the propeller or rudder piece is conveniently and accurately transported to the installation position, so as to ensure the precision of assembly;

[0015] 2. The technical scheme of the application, the left bracket lifting cylinder and the left bracket cylinder are used to realize the movement of the left bracket in the plane, and the specific movement amount of the left bracket in the transverse direction is measured by means of the pull rope displacement sensor;The right bracket lifting cylinder and the right bracket cylinder are used to realize the movement of the right bracket in the plane, and the specific movement amount of the right bracket in the transverse direction is measured by means of the pull rope displacement sensor;

[0016] 3. In the structure of the application, the four corners of the base are respectively provided with a group of lifting devices and a rotating device for driving the base to move up and down and move, so that the left bracket and the right bracket produce synchronous longitudinal movement, which helps to smoothly send the propeller / rudder piece into the front end of the installation shaft for flush stern;

[0017] 4. The structure of the application is reasonable in layout, and the operation platform is movable and has various lifting forms, which can be applied to different marine stern operations, and is convenient to operate, and is conducive to popularization. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of an embodiment of the application.

[0019] Figure 2 It is the local structural schematic diagram of the application.

[0020] Figure 3 It is the structural schematic diagram of the base and the middle seat of the application.

[0021] Figure 4 It is the local structural schematic diagram of the middle seat of the application.

[0022] Figure 5 It is the structural schematic diagram of the left bracket of the application.

[0023] Figure 6 It is the local structural schematic diagram of the left bracket of the application.

[0024] Figure 7Structure diagram of right bracket of the present application.

[0025] Figure 8 Structure diagram of right bracket of the present application.

[0026] Figure 9 Structure diagram of lifting device and rotating device of the present application.

[0027] Figure 10 Structure diagram of Figure 9

[0028] Figure 11 Structure diagram of lifting fine adjustment device of the present application.

[0029] Figure 12 Structure diagram of lifting fine adjustment device of the present application.

[0030] Figure 13 Structure diagram of Figure 11

[0031] Figure 14 Structure diagram of Figure 12

[0032] Reference signs:

[0033] 1. right bracket

[0034] 2. guardrail

[0035] 3. left bracket

[0036] 4. screw rod

[0037] 5. lifting box

[0038] 6. ladder

[0039] 7. base

[0040] 8. middle seat

[0041] 9. base guide rail

[0042] 10. middle seat guide rail

[0043] 11. base fulcrum hinge

[0044] 12. base oil cylinder

[0045] 13. base pushing hinge

[0046] 14. right bracket oil cylinder

[0047] 15. right bracket fulcrum hinge

[0048] 16. right bracket pushing hinge​​​

[0049] 17. Left bracket hydraulic cylinder

[0050] 18. Left bracket pivot hinge

[0051] 19. The left bracket pushes the hinge.

[0052] 20. Left bracket push block

[0053] 21. Left bracket base

[0054] 22. Left bracket middle seat

[0055] 23. Left bracket center seat hinge

[0056] 24. Left bracket center seat hydraulic cylinder

[0057] 25. The left bracket center seat pushes the hinge.

[0058] 26. Left bracket upper seat

[0059] 27. Left bracket pull rope displacement sensor

[0060] 28. Left bracket lifting cylinder

[0061] 29. Right bracket base

[0062] 30. Right bracket center seat

[0063] 31. Right bracket center seat hinge

[0064] 32. Right bracket center seat hydraulic cylinder

[0065] 33. Right bracket upper seat

[0066] 34. The right bracket center seat pushes the hinge.

[0067] 35. Right bracket pull rope displacement sensor

[0068] 36. Right bracket lifting cylinder

[0069] 37. Right bracket push block

[0070] 38. Left bracket slider

[0071] 39. Right bracket slider

[0072] 40. Lifting box hydraulic cylinder

[0073] 41. Rack

[0074] 42. Lifting box displacement sensor module

[0075] 43. Lifting box hinge

[0076] 44. Electric motor

[0077] 45. Roller

[0078] 46. ​​Disc spring

[0079] 47. Gear

[0080] 48. Angle encoder

[0081] 49. Lifting box base

[0082] 50. Screw Handle

[0083] 51. Screw side seat

[0084] 52. Side seat bolt

[0085] 53. Hinged bolt

[0086] 54. Hinged bolts and nuts

[0087] 55. Hinged bolt pin

[0088] 56. Left half nut

[0089] 57. Right half nut

[0090] 58. Right half nut pin

[0091] 59. Bolt

[0092] 60. Gear base

[0093] 61. Lifting box rotation module

[0094] 62. Wheel base

[0095] 63. Screw base

[0096] 64. Ball joint. Detailed Implementation

[0097] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0098] This invention provides a marine stern work platform, see details below. Figure 1The difference from the prior art is that the operation platform comprises a base arranged on the ground provided with a sliding groove, the base is provided with a base guide rail and a middle base movable along the base guide rail, the middle base is provided with two groups of symmetrically arranged middle base guide rails, the middle base guide rails are respectively provided with left and right bracket systems movable along the middle base guide rails, the left and right bracket systems are respectively provided with left and right lifting devices in the middle, and the left and right bracket systems are respectively provided with left and right bracket moving devices below, so that the left and right brackets can be respectively displaced upward and downward and leftward and rightward on the middle base, and the left and right brackets can be respectively adjusted, and different stern operation needs can be flexibly adapted; one lifting device and one rotating device are arranged at each corner of the base to drive the base to move up and down and move.

[0099] In use, the stern operation platform can move on the ground, the middle base on the base, and the left and right brackets on the middle base can be moved individually, when the left and right brackets are synchronously moved longitudinally, for the flush stern, the propeller or the rudder blade can be smoothly sent to the front end of the installation shaft, and subsequent installation work is facilitated.

[0100] Embodiment 1

[0101] The base is provided with a base guide rail and a middle base 8 movable along the base guide rail, the middle base is provided with two groups of symmetrically arranged middle base guide rails 10, the middle base guide rails are respectively provided with left and right bracket systems 3, 1 movable along the middle base guide rails, the left and right bracket systems are respectively provided with left and right lifting devices in the middle, and the left and right bracket systems are respectively provided with left and right bracket moving devices below, the ship propeller or the ship rudder blade is supported by the left and right brackets, and the propeller or the rudder blade is accurately conveyed to the installation position by moving the left and right brackets, and the assembly precision is ensured.

[0102] Specifically, the middle part of the base is provided with a base oil cylinder 12, the output end of the base oil cylinder is connected with the middle base through a base pushing hinge 13, and the fixed end of the base oil cylinder is fixedly connected with the base through a base fulcrum hinge 11, so that the middle base can move along the base guide rail under the pushing of the base oil cylinder. The left bracket system comprises a left bracket upper seat, a left bracket middle seat and a left bracket lower seat, the left bracket upper seat and the left bracket middle seat 26, 22 are respectively connected with two ends of a left bracket middle seat oil cylinder 24; the left bracket lifting device comprises a left bracket lifting oil cylinder 28, the left bracket lifting oil cylinder is fixedly connected with the left bracket base 21; the left bracket moving device comprises a left bracket oil cylinder 17, a left bracket pushing block 20 matched with the left bracket oil cylinder and a left bracket sliding block 38 fixedly connected with the left bracket pushing block, and the left bracket sliding block is movably connected with the middle base guide rail.

[0103] Further, the left bracket upper seat 26 and the left bracket middle seat 22 are movably connected, the bottom of the left bracket upper seat is provided with a pulley, the left bracket upper seat is connected with the output end of the left bracket middle seat oil cylinder, and the left bracket middle seat is connected with the fixed end of the left bracket middle seat oil cylinder; the lower portion of the left bracket base is provided with a supporting foot, and the supporting foot is provided with a left bracket pull rope displacement sensor 27, which is used to detect the moving displacement value of the left bracket upper seat.

[0104] The right bracket system comprises a right bracket upper seat, a right bracket middle seat and a right bracket lower seat, the right bracket upper seat and the right bracket middle seat 33, 30 are respectively connected with two ends of a right bracket middle seat oil cylinder 32; the right bracket lifting device comprises a right bracket lifting oil cylinder 36, the right bracket lifting oil cylinder is fixedly connected with the right bracket base 29; the right bracket moving device comprises a right bracket oil cylinder 14, a right bracket pushing block 37 matched with the right bracket oil cylinder and a right bracket sliding block 39 fixedly connected with the right bracket pushing block, and the right bracket sliding block is movably connected with the middle base guide rail.

[0105] Further, the right bracket upper seat and the right bracket middle seat are movably connected, the bottom of the right bracket upper seat is provided with a pulley, the right bracket upper seat is connected with the output end of the right bracket middle seat oil cylinder, and the right bracket middle seat is connected with the fixed end of the right bracket middle seat oil cylinder; the lower portion of the right bracket base is provided with a right bracket pull rope displacement sensor 35, which is used to detect the moving displacement value of the right bracket upper seat.

[0106] The lifting device comprises a lifting box 5 and a lifting box oil cylinder 40 arranged in the lifting box, and the lifting box base is fixedly connected with the base 7; the lifting box oil cylinder is connected with a lifting box displacement sensor module 42 arranged below the lifting box through a rack 41; the lower portion of the lifting box displacement sensor module is provided with a rotating device, and the rotating device is a lifting box rotating module 61.

[0107] Further, the lifting box displacement sensor module comprises a gear base 60, the gear base is provided with a gear 47 matched with the rack, the rotating shaft of the gear is fixedly connected with an angle encoder 48, and the gear base is provided with a disc spring 46 for adjusting the engagement tightness of the gear and the rack; the platform lifting rotation module comprises a gear base 60, one side of the gear base is provided with a motor 44, and the gear base is provided with a roller 45, and the output end of the motor is connected with the rotating shaft of the roller. The roller and the base are connected through a moving pair perpendicular to the ground and a rotating pair parallel to the ground, the roller rolls on the guide rail to form a friction force in the horizontal plane, thereby providing the base with a forward movement power.

[0108] The lifting fine adjustment device comprises a screw rod 4, the top of the screw rod is connected with a screw rod handle 50, the bottom of the screw rod is connected with a screw rod base 63, the screw rod and the base are fixedly connected through a screw rod side base 51, and a locking device arranged on the screw rod is arranged below the screw rod side base.

[0109] Further, the locking device comprises a set of left and right half nuts 56 and 57 matched with each other, the left half nut is fixedly connected with the screw rod side base, one side of the left and right half nuts is connected through a right half nut pin 58, the right half nut and the right half nut pin are rotatably connected, and the other side of the left and right half nuts is connected through a hinge bolt nut 54, and the opening and closing between the left and right half nuts are adjusted by rotating the hinge bolt nut.

[0110] In the specific implementation process, the working process of the universal stern operation platform is as follows:

[0111] 1. The two ends of the marine propeller are respectively placed on the left bracket and the right bracket, or the balance wing of the marine rudder blade (with a balance wing) is respectively placed on the left bracket and the right bracket;

[0112] 2. The hydraulic drive roller is used to translate the whole platform to a general installation position, the lifting oil cylinder is used to coarsely adjust the height of the platform, and the gear and rack mechanism and the angle encoder are used to accurately measure the height of the platform;

[0113] 3. The left bracket lifting oil cylinder and the left bracket oil cylinder are used to realize the movement of the left bracket in the plane, and the pull rope displacement sensor is used to measure the specific movement amount of the left bracket in the transverse direction;

[0114] 4. The right bracket lifting oil cylinder and the right bracket oil cylinder are used to realize the movement of the right bracket in the plane, and the pull rope displacement sensor is used to measure the specific movement amount of the right bracket in the transverse direction;

[0115] 5. The base oil cylinder is used to realize the movement of the middle base in the longitudinal direction, so that the left bracket and the right bracket produce synchronous longitudinal movement (large range). For the flush stern, this function helps to smoothly send the propeller / rudder into the front end of the installation shaft;

[0116] 6. By the operation of the above steps 2~5, the position of the propeller / rudder end (i.e. the position of the left bracket and the right bracket) is changed, so as to align the propeller / rudder with the installation shaft for installation;

[0117] 7. After installation, during the process of waiting for the owner's inspection, the half nut and the universal bolt are used to realize the combination of the screw nut pair, so that the platform is reliably stationary and does not fall;

[0118] 8. After the inspection is completed, the middle seat is withdrawn, and then the entire stern work platform is withdrawn without changing the direction of the track.

[0119] Example 2

[0120] The specific embodiment of the general stern work platform according to the present application is divided into the following five steps:

[0121] (I) Base plane movement and vertical lifting

[0122] The connection relationship involved in this step is that the base 7 is fixedly connected with the lifting box base 49 through the bolt 59; the lifting box oil cylinder 40 is located inside the lifting box 5; the rack 41 is fixedly connected with the lifting box oil cylinder 40; the rack 41 is connected with the lifting box displacement sensor module 42; inside the lifting box displacement sensor module 42, the rack 41 is engaged with the gear 47, the disc spring 46 is pressed on the gear base 60, and the angle encoder 48 is fixedly connected with the gear 47; the lifting box 5 is connected with the lifting box rotation module 61 through the lifting box hinge 43; inside the rotation module 61, the motor 44 can rotate relative to the wheel base 62, the motor 44 is fixedly connected with the roller 45, and the roller 45 can be embedded in the groove of the special track for ground; the screw rod side seat 51 is fixedly connected with the base 7 through the side seat bolt 52; the left half nut 56 is fixedly connected with the screw rod side seat 51; the left half nut 56 is connected with the right half nut 57 through the right half nut pin column 58; the left half nut 56 is connected with the universal bolt 53 through the universal bolt pin column 55; when the universal bolt nut 54 is tightened, the left half nut 56 and the right half nut 57 form a fixed connection of folding together; when the universal bolt nut 54 is loosened, the universal bolt nut 54 can rotate out around the universal bolt pin column 55, so as to allow the right half nut 57 to rotate out around the right half nut pin column 58, so that the left half nut 56 and the right half nut 57 are separated from each other; the screw rod 4 forms a ball joint 64 with the screw rod base 63; when the left half nut 56 and the right half nut 57 are fixedly connected by folding together, a screw nut motion pair is formed with the screw rod 4; the screw rod handle 50 is fixedly connected with the screw rod 4.

[0123] The specific steps are as follows: firstly, the motor 44 drives the roller 45 to rotate, so that the base 7 moves on the ground paved with grooves to produce in-plane movement, so that the whole platform produces in-plane movement; then, the loose joint bolt nut 54 is loosened, so that the left half nut 56 and the right half nut 57 are separated from each other, and the lifting box oil cylinder 40 is driven to produce a large vertical lifting movement of the base (i.e. coarse adjustment), during which the movement of the rack 41 is converted into the rotation of the gear 47 (the reliable meshing of the rack and the gear is ensured by adjusting the pressure of the disc spring 46), and the angle encoder 48 generates a reading, according to which the actual displacement value of the lifting box oil cylinder 40 is calculated; after the coarse adjustment is completed, the left half nut 56 and the right half nut 57 are closed and the loose joint bolt nut 54 is tightened, and the lifting box oil cylinder 40 is released, and the rotation movement is converted into the small vertical lifting movement of the screw side seat 51 along the screw 4 by manually rotating the screw handle 50 (i.e. fine adjustment), so that the height of the base 7 can be accurately adjusted to the required value.

[0124] (II) Left bracket in-plane movement and vertical lifting

[0125] The connection relationship involved in this step is that the left bracket 3 is fixedly connected with the left bracket upper seat 26, the left bracket middle seat oil cylinder 24 is connected with the left bracket upper seat 26 through the left bracket middle seat pushing hinge 25, the left bracket middle seat 22 is connected with the left bracket middle seat oil cylinder 24 through the left bracket middle seat fulcrum hinge 23, the left bracket bottom seat 21 is fixedly connected with the left bracket middle seat 22, the left bracket pull rope displacement sensor 27 is fixedly connected with the left bracket bottom seat 21, the left bracket lifting oil cylinder 28 is fixedly connected with the left bracket bottom seat 21, the left bracket pushing block 20 is fixedly connected with the left bracket sliding block 38, the left bracket sliding block 38 forms a sliding pair with the middle seat guide rail 10, the left bracket pushing block 20 is connected with the left bracket oil cylinder 17 through the left bracket pushing hinge 19, and the left bracket oil cylinder 17 is connected with the middle seat 8 through the left bracket fulcrum hinge 18.

[0126] The specific steps are as follows: firstly, the left bracket lifting oil cylinder 28 is driven to produce a large vertical lifting movement of the left bracket bottom seat 21; then, the left bracket middle seat oil cylinder 24 is driven to produce a transverse movement of the left bracket upper seat 26 relative to the left bracket middle seat 22, during which the actual movement amount can be measured by the left bracket pull rope displacement sensor 27 for fine adjustment; finally, the left bracket oil cylinder 17 is driven to push the left bracket pushing block 20, so as to drive the left bracket sliding block 38 to produce a longitudinal movement on the middle seat guide rail 10, thereby producing a longitudinal movement of the left bracket 3.

[0127] (III) Right bracket in-plane movement and vertical lifting

[0128] The connecting relationship involved in this step is: the right bracket 1 is fixedly connected with the right bracket upper seat 33; the right bracket middle seat oil cylinder 32 is connected with the right bracket upper seat 33 through the right bracket middle seat pushing hinge 34; the right bracket middle seat 30 is connected with the right bracket middle seat oil cylinder 32 through the right bracket middle seat fulcrum hinge 31; the right bracket base 29 is fixedly connected with the right bracket middle seat 30; the right bracket pull rope displacement sensor 35 is fixedly connected with the right bracket base 29; the right bracket lifting oil cylinder 36 is fixedly connected with the right bracket base 29; the right bracket pushing block 37 is fixedly connected with the right bracket sliding block 39; the right bracket sliding block 39 forms a sliding pair with the middle seat guide rail 10; the right bracket pushing block 37 is connected with the right bracket oil cylinder 14 through the right bracket pushing hinge 16; the right bracket oil cylinder 14 is connected with the middle seat 8 through the right bracket fulcrum hinge 15.

[0129] The specific steps are as follows: first, the right bracket lifting oil cylinder 36 is driven to make the right bracket base 29 produce a large vertical lifting movement; then, the right bracket middle seat oil cylinder 32 is driven to make the right bracket upper seat 33 produce a transverse movement relative to the right bracket middle seat 30, and in this process, the actual movement amount can be measured by the right bracket pull rope displacement sensor 35 for fine adjustment; finally, the right bracket oil cylinder 14 is driven to push the right bracket pushing block 37, and drive the right bracket sliding block 39 to produce a longitudinal movement on the middle seat guide rail 10, so as to make the right bracket 1 produce a longitudinal movement.

[0130] (Four) longitudinal movement of the middle seat

[0131] The connecting relationship involved in this step is: the middle seat 8 forms a sliding pair with the base guide rail 9; the base oil cylinder 12 is connected with the middle seat 8 through the base pushing hinge 13; the base oil cylinder 12 is connected with the base 7 through the base fulcrum hinge 11.

[0132] The specific steps are as follows: the base oil cylinder 12 is driven to make the middle seat 8 produce a large longitudinal movement on the base guide rail 9, and this step can realize the synchronous longitudinal movement of the left bracket 3 and the right bracket 1. For the flush type stern, this function helps to smoothly send the propeller / rudder into the front end of the installation shaft.

[0133] (Five) aligning and installing the propeller / rudder on the installation shaft

[0134] In the implementation, the two ends of the propeller / rudder are respectively placed on the left bracket 3 and the right bracket 1, so the alignment operation of the propeller / rudder is actually the movement operation of the left bracket 3 and the right bracket 1 in three directions (i.e., transverse, longitudinal and vertical), and therefore the propeller can be conveniently aligned and installed on the installation shaft through the operations of the first to fourth steps. The platform is equipped with a guardrail 2 and a staircase 6, and the whole operation process only needs 1-2 operators, which is safe and efficient.

[0135] The above is further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed as limitation of the present application to the above description. For those skilled in the art of the present application, some simple deductions or replacements can be made without departing from the concept of the present application, and all of them shall be deemed as falling within the protection scope of the present application.

Claims

1. A marine stern work platform, characterized in that: The working platform includes a base, on which are provided base guide rails and a central seat that can move along the base guide rails. The central seat has two sets of symmetrically arranged central seat guide rails, and on the central seat guide rails are left and right bracket systems that can move along the central seat guide rails. The upper part of the left and right bracket systems is provided with left and right lifting devices, and the lower part of the left and right bracket systems is provided with left and right bracket moving devices. The left and right brackets are used to support the stabilizer blade of the rudder, thereby forming a stable three-point support. At the four corners of the base, there is a set of lifting devices and a rotating device to drive the base to lift and move. On both sides of the base, there are lifting fine-tuning devices that cooperate with the lifting devices to fine-tune the lifting and lowering movement of the base. The lifting and fine-tuning device includes a screw, the top of which is connected to a screw handle, and the bottom of which is connected to a screw base. The screw and the base are fixedly connected by a screw side seat. A locking device is located below the screw side seat and mounted on the screw. The locking device includes a set of mating left and right half-nuts. The left half-nut is fixedly connected to the screw side seat. One side of the left and right half-nuts is connected by a right half-nut pin, and the right half-nut and right half-nut pin are rotatably connected. The other side of the left and right half-nuts is connected by a hinged bolt nut. Rotating the hinged bolt nut adjusts the opening and closing of the left and right half-nuts. When the hinged bolt nut is loosened, it rotates around the hinged bolt pin, causing the right half-nut to rotate around the right half-nut pin, thus disengaging the left and right half-nuts. This drives the lifting box cylinder, causing the base to lift vertically, completing the coarse adjustment. When the hinged bolt nut is tightened, the left half-nut... The nut and right half nut form a closed and fixed connection, releasing the lifting box cylinder. By manually turning the screw handle, the rotational motion is converted into the vertical lifting motion of the screw side seat along the screw, completing the fine adjustment so that the height of the base can be precisely adjusted to the required value. The lifting device includes a lifting box and a lifting box cylinder inside the lifting box. The lifting box base is fixedly connected to the base. The lifting box cylinder is connected to the lifting box displacement sensor module located below the lifting box via a rack. Below the lifting box displacement sensor module is a rotating device, which is the lifting box rotation module. The lifting box displacement sensor module includes a gear base, in which a gear that meshes with the rack is installed. An angle encoder is fixedly connected to the shaft of the gear. A disc spring for adjusting the meshing tightness of the gear and rack is installed in the gear base. The lifting box rotation module includes a gear base, with a motor on one side of the wheel base. A roller is installed in the wheel base, and the output end of the motor is connected to the rotation shaft of the roller.

2. A marine stern work platform according to claim 1, characterized in that: The base is provided with a base cylinder in the middle. The output end of the base cylinder is connected to the middle seat through the base push hinge (13). The fixed end of the base cylinder is fixedly connected to the base through the base fulcrum hinge (11).

3. A marine stern work platform according to claim 1, characterized in that: The left bracket system includes upper, middle, and lower left bracket seats, with the upper and middle left bracket seats connected to the two ends of the middle left bracket seat cylinder respectively; the left bracket lifting device includes a left bracket lifting cylinder, which is fixedly connected to the left bracket base; the left bracket moving device includes a left bracket cylinder, a left bracket pushing block that cooperates with the left bracket cylinder, and a left bracket slider that is fixedly connected to the left bracket pushing block, with the left bracket slider and the middle seat guide rail forming a movable connection.

4. A marine stern work platform according to claim 3, characterized in that: The upper left bracket and the middle left bracket are movably connected. The bottom of the upper left bracket is equipped with a pulley. The upper left bracket is connected to the output end of the cylinder of the middle left bracket, and the middle left bracket is connected to the fixed end of the cylinder of the middle left bracket. A left bracket pull rope displacement sensor is provided below the base of the left bracket to detect the displacement value of the upper left bracket.

5. A marine stern work platform according to claim 1, characterized in that: The right bracket system includes upper, middle and lower right bracket seats, with the upper and middle right bracket seats connected to the two ends of the right bracket middle seat cylinder respectively; the right bracket lifting device includes a right bracket lifting cylinder, which is fixedly connected to the right bracket base; the right bracket moving device includes a right bracket cylinder, a right bracket pushing block that cooperates with the right bracket cylinder, and a right bracket slider that is fixedly connected to the right bracket pushing block, with the right bracket slider forming a movable connection with the middle seat guide rail.

6. A marine stern work platform according to claim 5, characterized in that: The upper right bracket and the middle right bracket are movably connected. The bottom of the upper right bracket is equipped with a pulley. The upper right bracket is connected to the output end of the cylinder of the middle right bracket, and the middle right bracket is connected to the fixed end of the cylinder of the middle right bracket. A right bracket pull rope displacement sensor is provided below the base of the right bracket to detect the displacement value of the upper right bracket.

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