Leakage-proof rudder shaft tube of ship supporting streamline flap-type rudder
The threaded connection design of the limit bracket and pressure plate with sealing gasket solves the sealing problem of the rudder shaft tube, achieving a stable sealing effect and convenient disassembly and assembly, thus avoiding lubricating oil leakage and mechanical damage.
Patent Information
- Application Number
- CN202520098989.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-16
AI Technical Summary
With prolonged use, the embedded rubber gasket of the existing rudder shaft tube is prone to aging, which affects the sealing performance, causing lubricating oil leakage, water pollution, and damage to the internal mechanical structure.
The structure adopts a combination of a limit bracket and a pressure plate with a sealing gasket. The sealing gasket is fixed by a threaded connection, and limit posts and sleeve posts are used to assist in disassembly and assembly tools to ensure the stability and removability of the sealing gasket.
It improves the sealing effect, reduces the risk of gasket aging and falling off, reduces lubricant leakage, and improves operating efficiency and sealing performance.
Smart Images

Figure CN223835791U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rudder shaft tube technology, and in particular to a leak-proof rudder shaft tube for a streamlined flap rudder supporting a ship. Background Technology
[0002] A ship's rudder shaft tube is a conduit that connects the rudder to the hull, enabling the rudder to rotate. It is typically made of metal and contains a steering gear, whose rotation controls the rudder's direction.
[0003] In the current use of rudder shaft tubes, embedded rubber gaskets are usually used to seal and prevent leakage, in order to avoid water pollution caused by lubricating oil leakage and damage to the internal mechanical structure. However, the embedded gasket structure is prone to aging after long-term use, which affects the sealing performance and results in unsatisfactory performance. Utility Model Content
[0004] The purpose of this utility model is to provide a leak-proof rudder shaft tube for a streamlined flap rudder of a ship, in order to solve the problem mentioned in the background art. In the process of use, the existing rudder shaft tube usually adopts the method of embedding rubber sealing gaskets to seal and prevent leakage, so as to avoid water pollution caused by lubricating oil leakage and damage to the internal mechanical structure. However, the embedded sealing gasket structure is prone to aging under long-term use, and the sealing performance is affected, resulting in unsatisfactory use effect.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] This utility model relates to a leak-proof rudder shaft tube for supporting streamlined flap rudders on ships, comprising:
[0007] The rudder shaft tube section includes a rudder shaft tube body.
[0008] The leak-proof sealing part includes a limiting frame, a pressure plate, a sealing gasket, and a threaded groove. The threaded groove is evenly distributed on the outer surface of the limiting frame, and the limiting frame is threadedly connected to the end of the rudder shaft tube body. The pressure plate is symmetrically distributed on the inner wall end of the limiting frame, and the sealing gasket is fitted between the inner sides of the pressure plate.
[0009] Furthermore, one of the pressure plates is fixedly connected to one end of the inner wall of the limiting frame, and the other pressure plate is fitted to the other end of the inner wall of the limiting frame.
[0010] Furthermore, a limit post is equidistantly connected through the center of the front of one of the pressure plates and extends through the sealing gasket into the center of the front of the other pressure plate.
[0011] Furthermore, the rudder shaft tube also includes a connecting flange and connecting bolt holes. The connecting flange is symmetrically and fixedly connected to the end of the rudder shaft tube body, and the connecting bolt holes are equidistantly opened through the outer edge of the connecting flange.
[0012] Furthermore, it also includes an auxiliary disassembly and assembly part, which includes a first support column, a second support column, and an anti-slip sleeve. The second support column is connected through to the middle of one end of the first support column, and the anti-slip sleeve is fitted and fixedly connected to the middle of the second support column. The outer surface of the anti-slip sleeve is provided with anti-slip patterns at equal intervals.
[0013] Furthermore, a sleeve post is fixedly connected to the middle of the other end of the first pillar, and a sleeve hole is opened in the middle of the limiting post, with one end of the sleeve post sleeved and connected to the sleeve hole.
[0014] Compared with existing technologies, the advantages of this utility model are:
[0015] This utility model uses a limiting frame and a set of pressure plates to structurally limit the sealing gasket. Structurally limiting the sealing gasket can ensure that the structure is not detached, which helps to improve the sealing effect. Furthermore, the limiting frame and the inner wall end of the rudder shaft tube are connected by threads, which can satisfy the requirements of disassembly and assembly while ensuring the connection is sealed, further improving the sealing effect and facilitating use.
[0016] Based on the above-mentioned beneficial effects, a sleeve hole is provided in the middle of the front of the two sets of limiting columns. The sleeve column can be used to install and fix the first column. When used with the second column and anti-slip sleeve, a disassembly and assembly tool can be formed to facilitate the application of disassembly and assembly force to the limiting frame. This saves time and effort and reduces the time required to find the disassembly and assembly tool, which helps to improve work efficiency, has strong applicability, and meets the needs of use. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is an appearance drawing of the present utility model;
[0019] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;
[0020] Figure 3 This is a diagram showing the installation position of the auxiliary disassembly and assembly part of this utility model.
[0021] The attached diagram lists the components represented by each number as follows:
[0022] 11. Steering shaft tube body; 12. Connecting flange; 13. Connecting bolt hole; 21. Limiting bracket; 22. Pressure plate; 23. Sealing gasket; 24. Limiting post; 25. Threaded groove; 31. Sleeve hole; 32. Sleeve post; 33. First support post; 34. Second support post; 35. Anti-slip sleeve. Detailed Implementation
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0026] Please see Figure 1-3 As shown, this embodiment is a leak-proof rudder shaft tube for supporting a streamlined flap rudder on a ship, comprising:
[0027] The rudder shaft tube section includes the rudder shaft tube body 11.
[0028] The rudder shaft tube body 11 is used to connect the rudder and the hull.
[0029] The rudder shaft tube also includes a connecting flange 12 and connecting bolt holes 13. The connecting flange 12 is symmetrically fixed to the end of the rudder shaft tube body 11, and the connecting bolt holes 13 are equidistantly opened through the outer edge of the connecting flange 12.
[0030] After the connecting flange 12 is used with the connecting bolt hole 13 to insert and tighten the external bolts, the rudder shaft tube body 11 is connected and installed to the external structure.
[0031] The leak-proof sealing part includes a limiting frame 21, a pressure plate 22, a sealing gasket 23, and a threaded groove 25. The threaded groove 25 is evenly distributed on the outer surface of the limiting frame 21, and the limiting frame 21 is threadedly connected to the end of the rudder shaft tube body 11. The pressure plate 22 is symmetrically distributed on the inner wall end of the limiting frame 21, and the sealing gasket 23 is attached to the inner side of the pressure plate 22.
[0032] The limiting bracket 21 serves as the main mounting carrier for the leak-proof sealing part. It is used in conjunction with the threaded groove 25 for structural installation to ensure connection tightness and sealing. The pressure plate 22 structurally limits the sealing gasket 23 to prevent it from falling off due to aging. The sealing gasket 23 is used to seal the rudder shaft tube body 11 to prevent internal damage to the rudder shaft tube body 11 and to prevent water pollution caused by lubricating oil leakage.
[0033] One pressure plate 22 is fixedly connected to one end of the inner wall of the limiting frame 21, and the other pressure plate 22 is set to fit against the other end of the inner wall of the limiting frame 21.
[0034] One pressure plate 22 is equidistantly connected to the limit post 24 through the center of its front side, and extends through the sealing gasket 23 to the center of the front side of another pressure plate 22;
[0035] The limiting post 24 works in conjunction with the pressure plate 22 to structurally limit the sealing gasket 23;
[0036] Working principle: After the sealing gasket 23 is placed inside the limiting frame 21 and attached to one end of a pressure plate 22, another pressure plate 22 is placed inside the limiting frame 21, so that one end of the other pressure plate 22 is attached to the other end of the sealing gasket 23, and multiple limiting posts 24 are inserted into the pressure plate 22 in sequence to limit the structure of the sealing gasket 23.
[0037] At this point, the limit bracket 21 is placed into the end of the rudder shaft tube body 11 in sequence, and the limit bracket 21 is fixed in structure by applying tightening force using the threaded groove 25.
[0038] This solution can effectively ensure the stability of the sealing gasket 23 structure, prevent it from falling off due to aging, help improve the sealing effect, reduce the probability of damage to internal components of the rudder shaft tube body 11, and prevent water pollution caused by lubricating oil leakage.
[0039] Please see Figure 1-3 As shown, this embodiment is based on the above embodiment 1, and further includes an auxiliary disassembly and assembly part. The auxiliary disassembly and assembly part includes a first support column 33, a second support column 34, and an anti-slip sleeve 35. The second support column 34 is connected through to the middle of one end of the first support column 33, and the anti-slip sleeve 35 is sleeved and fixedly connected to the middle of the second support column 34. Anti-slip textures are evenly distributed on the outer surface of the anti-slip sleeve 35.
[0040] The first pillar 33 is installed on the second pillar 34, and then on the anti-slip sleeve 35. With the help of multiple anti-slip patterns on the outer surface, the limit frame 21 can be easily disassembled and assembled.
[0041] A sleeve post 32 is fixedly connected to the middle of the other end of the first pillar 33, and a sleeve hole 31 is opened in the middle of the limiting post 24. One end of the sleeve post 32 is sleeved and connected to the sleeve hole 31.
[0042] The sleeve connection between the sleeve column 32 and the sleeve hole 31 provides structural fixation for the first support column 33, satisfies the force transmission, and the sleeve connection method facilitates the assembly and disassembly of the structure.
[0043] Working principle: After inserting one end of the sleeve 32 into the sleeve hole 31 and applying inward pressing pressure, the first support 33 is structurally fixed. At one end of the first support 33, the second support 34 is used to fix the anti-slip sleeve 35.
[0044] At this time, the anti-slip texture on the outer surface of the anti-slip sleeve 35 can be used to apply a rotational force to the first support 33. The force acts on the limit frame 21, completing the disassembly and assembly of the limit frame 21.
[0045] This solution allows for convenient assembly and disassembly of the limit bracket 21 without the need to search for disassembly tools later, saving time and effort and improving assembly and disassembly efficiency.
[0046] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0047] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A leak-proof rudder shaft tube for supporting streamlined flap rudders on ships, characterized in that, include: The rudder shaft tube section includes a rudder shaft tube body (11). The leak-proof sealing part includes a limiting frame (21), a pressure plate (22), a sealing gasket (23), and a threaded groove (25). The threaded groove (25) is evenly distributed on the outer surface of the limiting frame (21), and the limiting frame (21) is threadedly connected to the end of the rudder shaft tube body (11). The pressure plate (22) is symmetrically distributed on the inner wall end of the limiting frame (21), and the sealing gasket (23) is attached to the inner side of the pressure plate (22).
2. The ship support streamlined flap rudder anti-leakage rudder shaft tube according to claim 1, characterized in that, One of the pressure plates (22) is fixedly connected to one end of the inner wall of the limiting frame (21), and the other pressure plate (22) is attached to the other end of the inner wall of the limiting frame (21).
3. The ship support streamlined flap rudder anti-leakage rudder shaft tube according to claim 1, characterized in that, One of the pressure plates (22) is equidistantly connected to a limiting post (24) through the center of its front side and extends through a sealing gasket (23) into the center of the front side of the other pressure plate (22).
4. The ship support streamlined flap rudder anti-leakage rudder shaft tube according to claim 1, characterized in that, The rudder shaft tube also includes a connecting flange (12) and a connecting screw hole (13). The connecting flange (12) is symmetrically fixed to the end of the rudder shaft tube body (11), and the connecting screw hole (13) is equidistantly opened through the outer edge of the connecting flange (12).
5. A leak-proof rudder shaft tube for supporting streamlined flap rudders as described in claim 1, characterized in that, It also includes an auxiliary disassembly and assembly part, which includes a first pillar (33), a second pillar (34), and an anti-slip sleeve (35). The second pillar (34) is connected through to the middle of one end of the first pillar (33), and the anti-slip sleeve (35) is sleeved and fixedly connected to the middle of the second pillar (34). The outer surface of the anti-slip sleeve (35) is equidistantly provided with anti-slip patterns.
6. A leak-proof rudder shaft tube for supporting streamlined flap rudders on a ship according to claim 5, characterized in that, A sleeve post (32) is fixedly connected to the middle of the other end of the first support post (33), and a sleeve hole (31) is opened in the middle of the limiting post (24). One end of the sleeve post (32) is sleeved and connected in the sleeve hole (31).