A mechanical stop device for a large-angle rudder used in ships

Abstract

The present application discloses a mechanical stop device for a large-rudder-angle rudder for ships, which is applied in the field of ship rudders. The application adopts a stop mechanism structure design with a lower base, a rotating seat, a lever-shaped rod, a stop block, a stop plate, and a second friction plate. In actual use, when the rudder pushing mechanism is out of control, the stop plate rotates with the rudder shaft, causing the sliding column to relatively move from the arc groove to the ramp groove, causing the sliding column to rise and drive the lever-shaped rod to rotate with the rotating seat as the rotation point, and the guide column at the other end of the lever-shaped rod moves downward, and then the stop block is pushed and close to the second friction plate of the stop plate by utilizing the transmission of the transmission force arm. On the one hand, the sliding column and the side of the ramp groove are matched to realize the initial stopping of the stop plate, and on the other hand, the first friction plate and the second friction plate are matched to realize the stopping of the stop plate, so as to achieve the purpose of protecting the ship. The present invention adopts a purely mechanical structure design, operates safely, reliably and timely, has market prospects, and is suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the field of ship rudders, and in particular to a mechanical stop device for a large-rudder-angle ship rudder. Background Art

[0002] The main steering device of a ship refers to the machinery, steering mechanism, steering gear power equipment and its auxiliary equipment required for driving the ship under normal navigation conditions, and the components that apply torque to the rudder stock (such as tiller and rudder fan). The main steering device can steer the ship at the maximum sailing draft and maximum operating forward speed, and turn the rudder from 35 degrees on either side to 35 degrees on the other side. Under the same conditions, the time required to turn from 35 degrees on one side to 30 degrees on the other side does not exceed 28 seconds. When the ship is making curved movements, the rudder is affected by the hull's rectification effect. In fact, due to the influence of the hull on the water flow near the stern, the water flow tends to flow in the direction of the ship's length, so the actual drift angle at the axis of the rudder stock is smaller than the geometric drift angle of the hull at the stern rudder. In normal turning, the effective angle of attack of the rudder is always smaller than the steering angle. However, when making a Z-shaped test, when the ship is steered in the opposite direction to get rid of the turning state, the effective angle of attack of the rudder will be greater than the steering angle.

[0003] In order to better cooperate with the bow thruster and improve the lateral thrust, the invention increases the original maximum rudder angle of 35 degrees to 45 degrees, thereby greatly improving the turning performance and lateral movement ability of the ship.

[0004] The steering device of the power steering should be equipped with a limit switch or similar equipment to limit the maximum steering angle, and a mechanical stop device should be provided to limit the steering angle when the limit switch fails. The angle should be 1.5 to 2 degrees larger than the maximum steering angle.

[0005] For this reason, we propose a mechanical stop device for a large-rudder-angle rudder used in ships to solve the above problems. Summary of the invention

[0006] The purpose of the present application is to design a mechanical stop device, which can automatically and timely stop the ship in the process of pushing the rudder beyond the limit after the pushing mechanism of the large rudder angle rudder fails, so as to achieve the purpose of ship navigation safety. Compared with the prior art, a mechanical stop device for a large rudder angle rudder for a ship is provided, which includes a stop mechanism and a pushing mechanism arranged on the top of the rudder from bottom to top in sequence, the rudder is fixed in the ship steering gear compartment through the rudder frame, and the rudder shaft of the rudder is rotatably connected in the rudder frame;

[0007] The stop mechanism comprises a lower base symmetrically installed in the ship's steering gear compartment, a rotating seat is fixed on opposite sides of the two lower bases, a lever-shaped rod is rotatably connected to the rotating seat through a rotating shaft, a sliding column is fixed to one end of the lever-shaped rod away from the lower base, a guide column is fixed to the other end of the lever-shaped rod, a guide hole matching the guide column is provided on the lower base, a return spring is clamped between the guide column and the guide hole, a stop block is provided on the top of the lever-shaped rod, right-angle connecting rods are symmetrically fixed on both sides of the stop block, the tops of the right-angle connecting rods are rotatably connected to the rotating seat through a rotating shaft, a transmission arm is provided between the stop block and the lever-shaped rod, the transmission arm is L-shaped, one end of the transmission arm is rotatably connected to one end of the lever-shaped rod provided with the guide column, and the other end of the transmission arm is rotatably connected to a side of the stop block away from the lower base;

[0008] A stop plate is fixed on the rudder shaft between the two lower bases, a second friction plate is provided at the bottom of the stop plate, the second friction plate is in a conical structure as a whole, a first friction plate matching the second friction plate is provided on the stop block, an arc groove matching the sliding column is provided on the top of the stop plate, and slope grooves are provided on both sides of the arc groove to gradually reduce the depth of the arc groove.

[0009] Optionally, the steering mechanism includes an upper base fixed on the top of the lower base, the two upper bases are symmetrically arranged, two groups of fork-type hydraulic rods are fixed between the two upper bases, and a steering seat is fixed to the rudder shaft between the two upper bases, and steering grooves matching the output ends of the fork-type hydraulic rods are provided on both sides of the steering seat, and the steering grooves are provided with a through limit groove, and a limit block is provided in the limit groove, and the limit block is provided with a socket hole matching the output end of the fork-type hydraulic rod, and the limit block is socketed through the socket hole and fixed to the output end of the fork-type hydraulic rod.

[0010] Optionally, a locking hydraulic rod is fixed on the top of the limit block, the output end of the locking hydraulic rod passes through the limit block and extends into the socket hole, and a docking hole matching the output end of the locking hydraulic rod is provided on the output end of the fork-type hydraulic rod.

[0011] Optionally, a distance sensor is fixed to one side of the upper base, and the detection end of the distance sensor is arranged opposite to the top of the guide column. The distance sensor is used to detect the downward movement distance of the guide column, and when the maximum downward movement distance is detected, it feeds back to the control unit that controls the locking hydraulic rod, so that it retracts the locking hydraulic rod.

[0012] Optionally, the return spring is a high-strength anti-fatigue spring structure, and the return spring has an elastic force that drives the guide column to move upward and away from the lower base. When the guide column moves upward to the maximum distance, the bottom of the sliding column contacts the bottom of the arc groove.

[0013] Optionally, the arcuate groove has an arc angle of ninety degrees, the slope groove is an arc extension groove of the arcuate groove in the horizontal plane, and the total arc angle of the slope groove and the arcuate groove is ninety-four degrees, that is, the arc angle of the slope grooves on both sides of the arcuate groove is two degrees.

[0014] Optionally, the steering mechanism pushes the rudder to rotate within a range of forty-five degrees to port and forty-five degrees to starboard.

[0015] Optionally, the stop plate and the rudder shaft are connected to each other through spokes, and the spokes are in a cross-shaped structure.

[0016] Optionally, multiple layers of corresponding reinforcing ribs are provided between the upper base and the lower base, and the upper base and the lower base are welded and fixed to the hull structure of the ship's steering gear compartment.

[0017] Optionally, a wear-resistant liner is welded and fixed between the outer wall of the sliding column and the groove wall of the arc-shaped groove, and the bottom of the sliding column is rotatably connected to the steel ball structure.

[0018] Compared with the prior art, the advantages of this application are:

[0019] (1) The present invention adopts a structural design of a stop mechanism with a lower base, a rotating seat, a lever, a slide column, a guide column, a reset spring, a transmission force arm, a stop block, a first friction plate, a right-angle connecting rod, a stop plate, an arc groove, a second friction plate, and a ramp groove. In actual use, when the push-rudder mechanism loses control and pushes the rudder to rotate to an extreme angle, the stop plate rotates with the rudder shaft, causing the slide column to relatively move from the arc groove to the ramp groove, causing the slide column to rise as the depth of the ramp groove decreases, thereby driving the lever to rotate with the rotating seat as the rotation point, and the guide column at the other end of the lever overcomes the reset spring. The elastic force of the spring moves downward, and then the transmission of the transmission arm is used to push the stop block and approach the second friction plate of the stop plate. When the sliding column moves up to the limit position, on the one hand, the sliding column and the side of the ramp groove are matched to achieve the initial stopping of the stop plate. On the other hand, the first friction plate and the second friction plate are matched to achieve the stopping operation of the stop plate, so that when the limit switch of the push-rudder mechanism fails, a simple mechanical structure can be used for reliable and safe stopping to achieve the purpose of protecting the ship. The present invention adopts a purely mechanical structure design, operates safely, reliably and timely, has market prospects, and is suitable for promotion and application.

[0020] (2) Through the design of a locking hydraulic rod with a distance sensor, when the stop mechanism triggers the stop plate of the rudder, the guide column on the lever overcomes the elastic force of the return spring and moves downward. At this time, the distance sensor detects that the guide column has moved down to the maximum distance, that is, when the rudder rotates beyond the limit to the maximum node, the control unit of the locking hydraulic rod receives the feedback signal of the distance sensor, retracts the locking hydraulic rod, and its output end is disengaged from the docking hole, thereby unlocking the limit block, and the limit block slides freely on the output end of the fork-type hydraulic rod, so that the out-of-control output end of the fork-type hydraulic rod will no longer push the push-rudder seat during operation, thereby protecting the push-rudder mechanism from overload damage and reducing the safety of the overall rudder mechanism.

[0021] (3) Through the curvature design of the ramp groove and the arc groove, the rudder pushing mechanism has a larger steering range. When the limit switch of the rudder pushing mechanism fails, that is, when the rudder pushing mechanism pushes the rudder to the maximum angle, the rudder pushing operation is still carried out. At this time, the slide column is located at the connection node of the ramp groove and the arc groove. During the continuous rudder pushing process when the rudder pushing mechanism is out of control, the slide column is guided upward by the ramp groove and can trigger the stop mechanism in time within a range of two degrees. On the one hand, the stop mechanism can be used to stop the rudder, and on the other hand, the restrictions of the ramp groove and the slide column can be used to limit the steering angle, thereby effectively improving the timeliness and effectiveness of the stop.

[0022] (4) The structural design of the spokes and reinforcing ribs effectively improves the structural strength of the stop plate, upper base, lower base, etc. During the high-intensity stopping process, deformation is not easy to occur, which effectively improves the stopping life. The sliding column design with a steel ball structure and wear-resistant liner makes the sliding column less likely to wear during operation, and effectively reduces the sliding friction, thereby improving the smoothness of the sliding column operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the front structure of this application;

[0024] Figure 2 This is a schematic diagram of the bottom structure of this application;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of this application;

[0026] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0027] Figure 5 This is a schematic diagram of the explosion structure of this application;

[0028] Figure 6 It is a schematic diagram of the exploded structure of the rudder pusher mechanism proposed in this application;

[0029] Figure 7 It is a schematic diagram of the structure of the stop disc proposed in this application;

[0030] Figure 8 It is a structural schematic diagram of the stop mechanism proposed in this application;

[0031] Fig. 9 It is a schematic diagram of the explosion structure of the stop mechanism proposed in this application;

[0032] Fig.10 It is a schematic diagram of the structure comparison of the stopping mechanism proposed in this application when stopped.

[0033] Description of the numbers in the figure:

[0034] Rudder 1, rudder frame 11, rudder shaft 12, rudder pushing mechanism 2, upper base 21, distance sensor 22, fork-type hydraulic rod 23, rudder pushing seat 24, rudder pushing groove 241, limit groove 242, limit block 25, socket hole 251, locking hydraulic rod 26, stop mechanism 3, lower base 31, rotating seat 311, lever-type rod 32, sliding column 321, guide column 322, return spring 323, transmission arm 33, stop block 34, first friction plate 341, right-angle connecting rod 342, stop plate 35, arc groove 351, second friction plate 352, ramp groove 353, spoke 354. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0036] Embodiment 1:

[0037] This application discloses a mechanical stop device for a large rudder angle rudder for ships, please refer to Figure 1-10 , including a stop mechanism 3 and a rudder pushing mechanism 2 which are sequentially arranged on the top of a rudder 1 from bottom to top, the rudder 1 is fixed in the ship steering gear compartment through a rudder frame 11, and a rudder shaft 12 of the rudder 1 is rotatably connected in the rudder frame 11;

[0038] The stop mechanism 3 includes a lower base 31 symmetrically installed in the ship's steering gear compartment, and a rotating base 311 is fixed on the opposite side of the two lower bases 31. A lever 32 is rotatably connected to the rotating base 311 through a rotating shaft. A sliding column 321 is fixed to one end of the lever 32 away from the lower base 31, and a guide column 322 is fixed to the other end of the lever 32. A guide hole matching the guide column 322 is provided on the lower base 31, and a reset spring 323 is clamped between the guide column 322 and the guide hole. A stopper 34 is provided at the top of the rod 32, and right-angle connecting rods 342 are symmetrically fixed on both sides of the stopper 34. The tops of the right-angle connecting rods 342 are rotatably connected to the rotating seat 311 through a rotating shaft. A transmission arm 33 is provided between the stopper 34 and the lever 32. The transmission arm 33 is an L-shaped structure. One end of the transmission arm 33 is rotatably connected to one end of the lever 32 provided with a guide column 322, and the other end of the transmission arm 33 is rotatably connected to a side of the stopper 34 away from the lower base 31.

[0039] A stop plate 35 is fixed between the two lower bases 31 of the rudder shaft 12, and a second friction plate 352 is provided at the bottom of the stop plate 35. The second friction plate 352 is generally in a conical structure, and a first friction plate 341 matching the second friction plate 352 is provided on the stop block 34. An arc groove 351 matching the sliding column 321 is provided at the top of the stop plate 35, and slope grooves 353 that gradually reduce the depth of the arc groove 351 are provided on both sides of the arc groove 351.

[0040] The present invention adopts the structural design of the stop mechanism 3 with a lower base 31, a rotating seat 311, a lever 32, a slide column 321, a guide column 322, a return spring 323, a transmission arm 33, a stop block 34, a first friction plate 341, a right-angle connecting rod 342, a stop plate 35, an arc groove 351, a second friction plate 352, and a ramp groove 353. In actual use, when the push-rudder mechanism 2 loses control and pushes the rudder 1 to rotate to the extreme angle, the stop plate 35 rotates with the rudder shaft 12, so that the slide column 321 is relatively displaced from the arc groove 351 to the ramp groove 353, so that the slide column 321 rises with the decrease in the depth of the ramp groove 353, thereby driving the lever 32 to rotate with the rotating seat 311 as the rotation point, and the lever The guide column 322 at the other end of 32 overcomes the elastic force of the return spring 323 and moves downward, and then utilizes the transmission of the transmission arm 33 to push the stop block 34 and approach the second friction plate 352 of the stop plate 35. When the slide column 321 moves up to the limit position, on the one hand, the slide column 321 and the side of the ramp groove 353 are matched to achieve the initial stopping of the stop plate 35. On the other hand, the first friction plate 341 and the second friction plate 352 are matched to achieve the stopping operation of the stop plate 35, so that when the limit switch of the push-rudder mechanism 2 fails, a simple mechanical structure can be used for reliable and safe stopping to achieve the purpose of protecting the ship. The present invention adopts a purely mechanical structure design, operates safely, reliably and timely, has market prospects, and is suitable for promotion and application.

[0041] For clarification, please refer to Figure 3-6 The steering mechanism 2 includes an upper base 21 fixed on the top of the lower base 31, the two upper bases 21 are symmetrically arranged, two groups of fork-type hydraulic rods 23 are fixed between the two upper bases 21, and a steering seat 24 is fixed to the rudder shaft 12 between the two upper bases 21. Both sides of the steering seat 24 are provided with steering grooves 241 matching the output end of the fork-type hydraulic rod 23, and the steering groove 241 is provided with a through limiting groove 242, and a limiting block 25 is provided in the limiting groove 242. The limiting block 25 is provided with a socket hole 251 matching the output end of the fork-type hydraulic rod 23, and the limiting block 25 is socketed through the socket hole 251 and fixed on the output end of the fork-type hydraulic rod 23.

[0042] For details, please refer to Figure 4-6A locking hydraulic rod 26 is fixed to the top of the limit block 25, and the output end of the locking hydraulic rod 26 passes through the limit block 25 and extends into the socket hole 251. A docking hole matching the output end of the locking hydraulic rod 26 is provided on the output end of the fork-type hydraulic rod 23. A distance sensor 22 is fixed to one side of the upper base 21, and the detection end of the distance sensor 22 is arranged opposite to the top of the guide column 322. The distance sensor 22 is used to detect the downward movement distance of the guide column 322, and when the maximum downward movement distance is detected, it is fed back to the control unit that controls the locking hydraulic rod 26 to retract the locking hydraulic rod 26.

[0043] Through the design of the locking hydraulic rod 26 with the distance sensor 22, when the stopping mechanism 3 triggers the stopping plate 35 of the stopping rudder 1, the guide column 322 on the lever 32 overcomes the elastic force of the reset spring 323 and moves downward. At this time, the distance sensor 22 detects that the guide column 322 moves down to the maximum distance, that is, when the rudder 1 exceeds the limit rotation maximum node, the control unit of the locking hydraulic rod 26 receives the feedback signal of the distance sensor 22, retracts the locking hydraulic rod 26, and disengages its output end from the docking hole, thereby unlocking the limit block 25, and the limit block 25 slides freely on the output end of the fork-type hydraulic rod 23, so that the out-of-control output end of the fork-type hydraulic rod 23 will no longer push the steering seat 24 during operation, thereby protecting the steering mechanism 2 from overload damage and reducing the safety of the overall mechanism of the rudder 1.

[0044] Specifically, the return spring 323 is a high-strength anti-fatigue spring structure, and has an elastic force to drive the guide column 322 to move upward and away from the lower base 31. When the guide column 322 moves upward to the maximum distance, the bottom of the sliding column 321 contacts the bottom of the arc groove 351.

[0045] Specifically, the arc groove 351 has an arc angle of ninety degrees, and the slope groove 353 is an arc extension groove of the arc groove 351 in the horizontal plane. The total arc angle of the slope groove 353 and the arc groove 351 is ninety-four degrees, that is, the arc angle of the slope groove 353 on both sides of the arc groove 351 is two degrees. The steering mechanism 2 pushes the rudder 1 to rotate within a range of forty-five degrees on the port side and forty-five degrees on the starboard side.

[0046] The curvature design of the slope groove 353 and the arc groove 351 allows the steering mechanism 2 to have a larger steering range. When the limit switch of the steering mechanism 2 fails, that is, when the steering mechanism 2 pushes the rudder to the maximum angle, it still pushes the rudder. At this time, the sliding column 321 is located at the connection node of the slope groove 353 and the arc groove 351. During the continuous steering process when the steering mechanism 2 is out of control, the sliding column 321 is guided upward by the slope groove 353, and can timely trigger the stopping mechanism 3 within a range of two degrees. On the one hand, the stopping mechanism 3 is used to stop the rudder 1, and on the other hand, the restrictions of the slope groove 353 and the sliding column 321 can be used to limit the steering angle, thereby effectively improving the timeliness and effectiveness of the stopping.

[0047] For details, please refer to Figure 4-10 The stop plate 35 and the rudder shaft 12 are reinforced by the spokes 354, and the spokes 354 are in a cross-shaped structure. A plurality of corresponding reinforcing ribs are arranged between the upper base 21 and the lower base 31. The upper base 21 and the lower base 31 are welded and fixed to the hull structure of the ship's steering gear compartment. Wear-resistant pads are welded and fixed between the outer wall of the sliding column 321 and the groove wall of the arc groove 351, and the bottom of the sliding column 321 is rotatably connected to the steel ball structure.

[0048] The structural design of the spokes 354 and the reinforcing ribs effectively improves the structural strength of the stop plate 35, the upper base 21, the lower base 31, etc., and is less likely to deform during the high-intensity stopping process, thereby effectively improving the stopping life. The design of the sliding column 321 with a steel ball structure and a wear-resistant liner makes the sliding column 321 less likely to wear during operation, and effectively reduces the sliding friction, thereby improving the smoothness of the operation of the sliding column 321.

[0049] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and its improved conception, which should be covered by the protection scope of the present application.

Claims

1. A mechanical stop device for a large-rudder-angle rudder for a ship, comprising a stop mechanism (3) and a rudder-pushing mechanism (2) arranged sequentially from bottom to top on the top of a rudder (1), characterized in that: The rudder (1) is fixed in a ship steering gear compartment via a rudder frame (11), and a rudder shaft (12) of the rudder (1) is rotatably connected in the rudder frame (11); The stop mechanism (3) comprises a lower base (31) symmetrically mounted in a ship steering gear compartment, a rotating base (311) is fixed on opposite sides of the two lower bases (31), a lever (32) is rotatably connected in the rotating base (311) via a rotating shaft, a sliding column (321) is fixed at one end of the lever (32) away from the lower base (31), a guide column (322) is fixed at the other end of the lever (32), a guide hole matching the guide column (322) is provided on the lower base (31), a return spring (323) is clamped between the guide column (322) and the guide hole, and the A stop block (34) is provided at the top of the lever (32), and right-angle connecting rods (342) are symmetrically fixed on both sides of the stop block (34), and the tops of the right-angle connecting rods (342) are rotatably connected to the rotating seat (311) through a rotating shaft, and a transmission arm (33) is provided between the stop block (34) and the lever (32), and the transmission arm (33) is in an L-shaped structure, and one end of the transmission arm (33) is rotatably connected to one end of the lever (32) provided with a guide column (322), and the other end of the transmission arm (33) is rotatably connected to a side of the stop block (34) away from the lower base (31); The rudder shaft (12) is fixed with a stop plate (35) between two lower bases (31); a second friction plate (352) is provided at the bottom of the stop plate (35); the second friction plate (352) is in a conical structure as a whole; a first friction plate (341) matching the second friction plate (352) is provided on the stop block (34); an arc groove (351) matching the sliding column (321) is provided at the top of the stop plate (35); and slope grooves (353) are provided on both sides of the arc groove (351) so as to gradually reduce the groove depth of the arc groove (351).

2. A mechanical stop device for a large rudder angle rudder for a ship according to claim 1, characterized in that: The steering mechanism (2) comprises an upper base (21) fixed on the top of the lower base (31), the two upper bases (21) are symmetrically arranged, two groups of fork-type hydraulic rods (23) are fixed between the two upper bases (21), the rudder shaft (12) is fixed with a steering seat (24) between the two upper bases (21), both sides of the steering seat (24) are provided with steering grooves (241) matching the output ends of the fork-type hydraulic rods (23), the steering grooves (241) are provided with a through-limiting groove (242), a limiting block (25) is provided in the limiting groove (242), the limiting block (25) is provided with a sleeve hole (251) matching the output end of the fork-type hydraulic rod (23), and the limiting block (25) is sleeved and fixed on the output end of the fork-type hydraulic rod (23) through the sleeve hole (251).

3. A mechanical stop device for a large rudder angle rudder for a ship according to claim 2, characterized in that: A locking hydraulic rod (26) is fixed on the top of the limit block (25); the output end of the locking hydraulic rod (26) passes through the limit block (25) and extends into the socket hole (251); and a docking hole matching the output end of the locking hydraulic rod (26) is provided on the output end of the fork-type hydraulic rod (23).

4. A mechanical stop device for a large rudder angle rudder for a ship according to claim 3, characterized in that: A distance sensor (22) is fixed to one side of the upper base (21), and a detection end of the distance sensor (22) is arranged opposite to the top of the guide column (322). The distance sensor (22) is used to detect the downward movement distance of the guide column (322), and when the maximum downward movement distance is detected, feedback is given to the control unit that controls the locking hydraulic rod (26), so that the locking hydraulic rod (26) is retracted.

5. The mechanical stop device for a large rudder angle rudder for a ship according to claim 1, characterized in that: The return spring (323) is a high-strength anti-fatigue spring structure, and has an elastic force that drives the guide column (322) to move upward and away from the lower base (31). When the guide column (322) moves upward to a maximum distance, the bottom of the sliding column (321) contacts the bottom of the arc groove (351).

6. The mechanical stop device for a large rudder angle rudder for a ship according to claim 1, characterized in that: The arcuate groove (351) has an arc angle of ninety degrees, and the slope groove (353) is an arc extension groove of the arcuate groove (351) in the horizontal plane. The total arc angle of the slope groove (353) and the arcuate groove (351) is ninety-four degrees, that is, the arc angle of the slope grooves (353) on both sides of the arcuate groove (351) is two degrees.

7. The mechanical stop device for a large rudder angle rudder for a ship according to claim 1, characterized in that: The rudder pusher mechanism (2) pushes the rudder (1) to rotate within a range of 45 degrees on the port side and 45 degrees on the starboard side.

8. The mechanical stop device for a large rudder angle rudder for a ship according to claim 1, characterized in that: The stop plate (35) and the rudder shaft (12) are reinforcedly connected via spokes (354), and the spokes (354) are in a cross-shaped structure.

9. The mechanical stop device for a large-rudder-angle rudder for a ship according to claim 2, characterized in that: Multiple layers of corresponding reinforcing ribs are arranged between the upper base (21) and the lower base (31), and the upper base (21) and the lower base (31) are welded and fixed to the hull structure of the ship's steering gear compartment.

10. The mechanical stop device for a large rudder angle rudder for a ship according to claim 1, characterized in that: A wear-resistant liner is welded and fixed between the outer wall of the sliding column (321) and the groove wall of the arc-shaped groove (351), and the bottom of the sliding column (321) is rotatably connected to a steel ball structure.

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