A hubcap fin for easy installation
Patent Information
- Application Number
- CN202522610955.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-09
AI Technical Summary
安装方式繁琐，传统毂帽鳍多采用螺栓紧固等刚性连接结构，装配与拆卸需依赖专用工具，操作流程复杂，耗时较长，严重影响制冷船舶航修、坞修的作业效率；连接可靠性不足，船舶航行过程中，螺旋桨需长期处于高速旋转状态，且面临海浪冲击、工况波动等复杂环境，传统连接结构易受离心力、振动影响出现松动甚至脱落，威胁航行安全；
该便于安装的毂帽鳍，安装时无需专用工具，仅需将毂帽本体对准螺旋桨本体的对接筒旋转，即可通过螺纹配合实现轴向预固定，后续借助限位铁环弧边的导向作用与扇形磁铁块的磁吸力辅助，实现自动精准卡合，全程操作简便、高效，显著缩短了制冷船舶航修、坞修过程中的拆装耗时，降低了人工操作难度。
Smart Images
Figure CN224899081U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigerated ship propulsion system technology, specifically a hub cap fin that is easy to install. Background Technology
[0002] As is well known, the hub fin, a key component of refrigerated ship propeller systems, plays a crucial role in optimizing the propeller wake field distribution, reducing wake vortex losses, and thus improving ship propulsion efficiency, meeting the core requirements of refrigerated ships for energy conservation and emission reduction. However, existing hub fins for refrigerated ships still face several technical challenges in practical applications: The installation method is cumbersome. Traditional hub caps and fins mostly use rigid connection structures such as bolt fastening. Assembly and disassembly require special tools, the operation process is complicated and time-consuming, which seriously affects the efficiency of refrigerated ship maintenance and dock repair. The connection reliability is insufficient. During the ship's navigation, the propeller needs to be in a high-speed rotation state for a long time and faces complex environments such as wave impact and operating condition fluctuations. Traditional connection structures are easily affected by centrifugal force and vibration, which can cause them to loosen or even fall off, threatening navigation safety. The assembly positioning accuracy is poor. Existing snap-fit structures lack guiding and auxiliary positioning designs, resulting in high resistance during the snap-fit process and a tendency for positioning deviations. This not only increases assembly difficulty but may also lead to excessive sealing gaps. The sealing protection effect is limited, allowing seawater to easily seep into the hub fin body through the assembly gaps, corroding connecting components and the propeller shaft hub, and shortening component lifespan. These problems not only increase the maintenance cost of the hub fin but also restrict its stability and practicality in the refrigerated ship application field. Therefore, there is an urgent need for a hub fin structure that is easy to install, has a firm connection, reliable sealing, and a stable structure. Utility Model Content
[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a hub cap fin that is easy to install.
[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a hubcap fin that is easy to install, comprising a hubcap body and a propeller body. The hubcap body is provided with fins, a sealing mechanism, and a reinforcing mechanism. A quick-installation mechanism is provided between the hubcap body and the propeller body. The quick-installation mechanism includes a limiting iron ring, a threaded post, and a docking cylinder. The limiting iron ring is installed on the inner wall of the hubcap body. The top of the limiting iron ring has an arc edge, and the outer side of the limiting iron ring has a slot. The threaded post is fixedly installed inside the hubcap body. The docking cylinder is fixedly connected to one end of the propeller body. One end of the docking cylinder has a threaded groove, and the threaded post is threadedly connected to the threaded groove. A docking ring is provided on the outer side of the docking cylinder. An adjusting ring groove is provided on the docking ring. A fan-shaped magnet is provided in the adjusting ring groove. A support post is provided on the inner wall of the adjusting ring groove. A telescopic groove is provided on one side of the fan-shaped magnet. The support post extends through the telescopic groove into the interior of the fan-shaped magnet. A limiting block is provided at one end of the support post.
[0005] Furthermore, the fan-shaped magnet blocks and the support columns are provided in multiple sets arranged in a circular array.
[0006] Furthermore, the sealing mechanism includes a sealing ring and a sealing ring, the sealing ring being installed at the top of the hub cap body and the sealing ring being installed at the top of the inner wall of the hub cap body.
[0007] Furthermore, an L-shaped ring is provided at the top of the inner wall of the hub cap body, and the L-shaped ring abuts against the inner side of the sealing ring.
[0008] Furthermore, both the sealing ring and the sealing ring are made of high and low temperature resistant rubber.
[0009] Furthermore, the reinforcement mechanism includes a reinforcement column, which is installed on the inner wall of the hub cap body, and the reinforcement column has an X-shaped structure.
[0010] Furthermore, the reinforcement mechanism is provided in multiple forms and arranged in a circular array.
[0011] (III) Beneficial Effects Compared with the prior art, the present invention provides a hub cap fin that is easy to install and has the following advantages: This easy-to-install hub cap fin requires no special tools for installation. Simply align the hub cap body with the docking cylinder of the propeller body and rotate it to achieve axial pre-fixation through threaded engagement. Subsequently, with the guidance of the arc edge of the limiting iron ring and the magnetic attraction of the fan-shaped magnet block, automatic and precise engagement is achieved. The entire operation is simple and efficient, significantly shortening the disassembly and assembly time during the ship repair and dock repair of refrigerated ships and reducing the difficulty of manual operation.
[0012] After assembly, the centrifugal force generated by the propeller rotation can cause the fan-shaped magnet to further press the slot of the limiting iron ring, forming a triple locking effect of pre-fixation, locking, and centrifugal force reinforcement. This effectively avoids the risk of loosening or falling off the connection under conditions such as high-speed rotation and wave impact, ensuring the long-term stability of the connection between the hub cap body and the propeller body, and ensuring the safety of ship navigation. Attached Figure Description
[0013] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a schematic diagram of the third-view structure of this utility model; Figure 4 This is a frontal half-sectional view of the structure of this utility model.
[0014] In the diagram: 1. Hub cap body; 2. Propeller body; 3. Fin; 4. Limiting iron ring; 5. Threaded column; 6. Connecting cylinder; 7. Arc edge; 8. Slot; 9. Threaded groove; 10. Connecting ring; 11. Adjusting ring groove; 12. Fan-shaped magnet block; 13. Support column; 14. Limiting block; 15. Sealing ring; 16. Sealing ring; 17. L-shaped ring; 18. Reinforcing column. Detailed Implementation
[0015] 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.
[0016] Please see Figures 1 to 4This utility model relates to an easy-to-install hubcap fin, comprising a hubcap body 1 and a propeller body 2. The hubcap body 1 is provided with fins 3, a sealing mechanism, and a reinforcing mechanism. A quick-connect mechanism is provided between the hubcap body 1 and the propeller body 2. The quick-connect mechanism includes a limiting iron ring 4, a threaded post 5, and a connecting cylinder 6. The limiting iron ring 4 is installed on the inner wall of the hubcap body 1, and the top of the limiting iron ring 4 has an arc edge 7. The outer side of the limiting iron ring 4 has a groove 8. The threaded post 5 is fixedly installed inside the hubcap body 1. The connecting cylinder 6 is fixedly connected to one end of the propeller body 2, and one end of the connecting cylinder 6 has a threaded groove 9. The threaded post 5 is threadedly connected to the threaded groove 9. The docking cylinder 6 is provided with a docking ring 10 on its outer side. The docking ring 10 is provided with an adjusting ring groove 11. A fan-shaped magnet block 12 is provided in the adjusting ring groove 11. A support column 13 is provided on the inner wall of the adjusting ring groove 11. A telescopic groove is provided on one side of the fan-shaped magnet block 12. The support column 13 extends through the telescopic groove into the interior of the fan-shaped magnet block 12. A limiting block 14 is provided at one end of the support column 13. In this embodiment, the hub cap body 1 is aligned with the docking cylinder 6 of the propeller body 2, so that the threaded post 5 on the inner wall of the hub cap body 1 is aligned with the threaded groove 9 at the end of the docking cylinder 6. The hub cap body 1 is rotated clockwise. The axial pre-fixed threaded connection is achieved through threaded engagement to provide basic fastening force and prevent it from falling off during installation. As the threaded post 5 is screwed into the threaded groove 9, the docking ring 10 on the outer side of the docking cylinder 6 gradually approaches the limiting iron ring 4 on the inner wall of the hub cap body 1. The arc edge 7 of the limiting iron ring 4 contacts the sector magnet 12, and the sector magnet 12 is squeezed by the arc edge 7, causing the sector magnet 12 to move on the support post 13 through the telescopic groove. The sector magnet 12 moves into the adjusting ring groove 11. When the threaded post 5 abuts against the bottom of the threaded groove 9, the hub cap body 1 and the propeller body 2 are assembled together. The sealing mechanism can ensure that the hub cap body 1 and the propeller body 2 are sealed together. At the same time, when the slot 8 of the limiting iron ring 4 is aligned with the position of the sector magnet 12 on the docking ring 10, the sector magnet... Block 12 generates a magnetic attraction force on the limiting iron ring 5, causing the fan-shaped magnet block 12 to extend outward along the telescopic groove of the support column 13 (the support column 13 provides guidance, and the limiting block 14 prevents the fan-shaped magnet block 12 from detaching). Finally, the fan-shaped magnet block 12 is inserted into the slot 8 of the limiting iron ring 4 (the arc edge 7 at the top of the limiting iron ring 4 reduces the engagement resistance and achieves smooth docking), completing the double locking. When used in subsequent processes, the propeller body 2 synchronously drives the hub cap body 1 to rotate, and the resulting centrifugal force can make the fan-shaped magnet block 12 more firmly pressed against the slot 8, ensuring the connection between the hub cap body 1 and the propeller body 2. The reinforcement mechanism works simultaneously to enhance the stability of the body structure.
[0017] In this design, both the fan-shaped magnet blocks 12 and the support columns 13 are provided in multiple sets arranged in a circular array. The circular array design ensures balanced circumferential force, avoiding stress concentration caused by single-point engagement. Multiple sets cooperate to form multi-point locking, improving the reliability of the fixation. It is suitable for the high-speed rotation (typically 300~600 r / min) of refrigerated ship propellers, preventing excessive force at a single point from causing engagement failure and hub cap fin misalignment; it disperses the locking force, reduces the wear of individual fan-shaped magnet blocks 12, and extends the service life of the quick-installation mechanism; during installation, there is no need for precise alignment of a single slot 8, improving the assembly error tolerance and further simplifying the installation operation.
[0018] In this design, the sealing mechanism includes a sealing ring 15 and a sealing ring 16. The sealing ring 15 is installed at the top of the hub cap body 1, and the sealing ring 16 is installed at the top of the inner wall of the hub cap body 1. The sealing ring 15 and the inner wall sealing ring 16 correspond to the end faces and radial gaps of the hub cap body 1 and the propeller body 2, respectively. The sealing ring 15 blocks the axial end face leakage channel, and the sealing ring 16 fills the radial gap, forming a three-dimensional sealing barrier. This completely prevents seawater from entering the gap between the hub cap body 1 and the docking cylinder 6, avoiding corrosion and rusting of the quick-installation mechanism (threaded column 5, sector magnet block 12, support column 13) by seawater; it also prevents seawater from contacting the propeller hub, protecting the core components of the propulsion system and reducing the maintenance costs of refrigerated ships. The sealing structure works in conjunction with the quick-installation mechanism, without adding installation steps, balancing convenience and protection.
[0019] In this design, an L-shaped ring 17 is provided at the top of the inner wall of the hub cap body 1. The L-shaped ring 17 abuts against the inner side of the sealing ring 16. An L-shaped limiting ring is added to the inner side of the sealing ring 16 to fix the position of the sealing ring 16 through axial contact. The L-shaped ring 17 provides radial limiting and axial support to prevent the sealing ring 16 from shifting or deforming during installation, disassembly, or propeller rotation. It ensures the fitting accuracy between the sealing ring 16 and the surface of the docking cylinder 6, ensures stable sealing compression, and improves sealing reliability. No additional fixing structure is required; the L-shaped ring 17 is directly positioned, reducing assembly difficulty. It also prevents the sealing ring 16 from falling off due to vibration or water flow impact, making it suitable for the bumpy and impact conditions during ship navigation.
[0020] In this design, both the sealing ring 15 and the sealing ring 16 are made of high and low temperature resistant rubber, and the sealing components are made of high and low temperature resistant rubber (preferably fluororubber or silicone rubber modified materials). High and low temperature resistant rubber maintains elasticity within a temperature range of -40℃ to 120℃, and is resistant to seawater corrosion and aging, making it suitable for the special operating conditions of refrigerated ships (temperature fluctuations caused by refrigeration system operation and alternating high and low temperatures in the marine environment). This prevents the seal from hardening and cracking at low temperatures and softening and leaking at high temperatures, ensuring effective sealing under all operating conditions. Seawater corrosion resistance extends the service life of the sealing components (≥3 years), reducing replacement frequency and maintenance costs; the rubber material has good elastic recovery, maintaining sealing compression even after long-term use, stably preventing seawater leakage.
[0021] In this solution, the reinforcement mechanism includes reinforcement columns 18, which are installed on the inner wall of the hub cap body 1. The reinforcement columns 18 have an X-shaped structure, which offers optimal mechanical stability and can simultaneously disperse radial stress (centrifugal force generated by propeller rotation) and axial stress, thereby enhancing the structural rigidity of the hub cap body 1. Multiple reinforcement mechanisms are arranged in a circular array, ensuring uniform distribution of reinforcement force along the circumference of the hub cap body 1. This avoids local structural weaknesses (such as the root of the fin 3 or the installation position of the quick-release mechanism), achieving a comprehensive reinforcement effect. This further improves the overall rigidity of the hub cap body 1, adapts to propeller hubs of different specifications, and enhances versatility; disperses the water flow impact force transmitted by the fin 3, preventing cracking at the root of the fin 3 and extending the overall service life of the hub cap fin; the reinforcement mechanism does not interfere with the assembly of the quick-release mechanism and sealing mechanism, balancing structural strength and installation convenience, and meeting the needs of efficient maintenance and stable operation of refrigerated ships.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A hub cap fin that is easy to install, characterized in that, The device includes a hub cap body (1) and a propeller body (2). The hub cap body (1) is provided with fins (3), a sealing mechanism, and a reinforcing mechanism. A quick-connect mechanism is provided between the hub cap body (1) and the propeller body (2). The quick-connect mechanism includes a limiting iron ring (4), a threaded post (5), and a docking cylinder (6). The limiting iron ring (4) is installed on the inner wall of the hub cap body (1). The top of the limiting iron ring (4) is provided with an arc edge (7), and the outer side of the limiting iron ring (4) is provided with a slot (8). The threaded post (5) is fixedly installed inside the hub cap body (1), and the docking cylinder (6) is fixedly connected to the propeller. One end of the main body (2) has a threaded groove (9) at one end of the docking cylinder (6), and the threaded column (5) is threaded to the threaded groove (9). The docking cylinder (6) has a docking ring (10) on its outer side, and an adjusting ring groove (11) is provided on the docking ring (10). A fan-shaped magnet block (12) is provided in the adjusting ring groove (11), and a support column (13) is provided on the inner wall of the adjusting ring groove (11). A telescopic groove is provided on one side of the fan-shaped magnet block (12), and the support column (13) extends through the telescopic groove to the interior of the fan-shaped magnet block (12). A limiting block (14) is provided at one end of the support column (13).
2. The hub cap fin for easy installation according to claim 1, characterized in that, The fan-shaped magnet block (12) and the support column (13) are provided in multiple sets and arranged in a ring array.
3. The hub cap fin for easy installation according to claim 1, characterized in that, The sealing mechanism includes a sealing ring (15) and a sealing ring (16). The sealing ring (15) is installed on the top of the hub cap body (1), and the sealing ring (16) is installed on the top of the inner wall of the hub cap body (1).
4. The hub cap fin for easy installation according to claim 3, characterized in that, The top of the inner wall of the hub cap body (1) is provided with an L-shaped ring (17), which abuts against the inner side of the sealing ring (16).
5. A hub cap fin that is easy to install according to claim 3, characterized in that, Both the sealing ring (15) and the sealing ring (16) are made of high and low temperature resistant rubber.
6. The hub cap fin for easy installation according to claim 1, characterized in that, The reinforcement mechanism includes a reinforcement column (18), which is installed on the inner wall of the hub cap body (1) and has an X-shaped structure.
7. A hub cap fin that is easy to install according to claim 6, characterized in that, The reinforcement mechanism is provided in multiple units arranged in a circular array.