External engine transmission sealing device for ship

By designing a multi-layer sealing structure and limiting device in the marine external engine transmission sealing device, the problem of the difficulty of long-lasting sealing performance of traditional sealing devices in harsh marine environments is solved, and longer sealing effect and higher stability are achieved and security.

CN222458296UActive Publication Date: 2025-02-11CHONGQING FANHONG SHIPPING MASCH CO LTD
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Patent Information

Application Number
CN202420981913.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-08
Publication Date
2025-02-11
Estimated Expiration
2034-05-08

AI Technical Summary

Technical Problem

Traditional marine external engine transmission sealing devices rely on a single sealing structure, such as gaskets or O-rings, which are difficult to maintain sealing performance under long-term seawater erosion and mechanical vibration.

Method used

A sealing mechanism including a sealing cover No. 1 and a sealing cover No. 2 are designed, and the sealing groove No. 1 is passed through a sealing block No. 1 and a sealing groove No. 2 and a sealing groove No. 2, as well as a sealing block No. 3 and a sealing groove No. 3 are used to provide a sealing mechanism with a sealing groove No. 3. The engaging structure combines the design of the connecting pipe and the bonding block to enhance the sealing effect.

Benefits of technology

It effectively extends the sealing performance, improves service life, and reduces the vibration of the transmission shaft through the limit structure, improving overall stability and safety.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222458296U_ABST
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Abstract

The utility model provides a marine external engine transmission sealing device, which relates to the technical field of ship engineering and comprises an engine, a first transmission shaft is mounted at the output end of the engine, a gear box is mounted at the lower end of the engine, and the lower end of the first transmission shaft is connected with the gear box. A second transmission shaft is installed on one side of the gearbox, a propeller is installed at one end of the second transmission shaft, and a sealing mechanism is installed among the first transmission shaft, the gearbox and the second transmission shaft. After the first sealing cover and the second sealing cover are connected in a clamped mode, preliminary sealing work can be achieved through the first sealing block and the first sealing groove, and then the sealing work can be achieved through clamping between the second sealing block and the second sealing groove and clamping between the third sealing block and the third sealing groove. And meanwhile, the sealing effect of the upper ends and the lower ends of the first sealing cover and the second sealing cover is further improved in cooperation with attachment of the connecting pipe and the first sealing cover and the second sealing cover, and the overall sealing performance is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of ship engineering, in particular to a transmission sealing device for an outboard ship engine. Background Art

[0002] In the shipbuilding industry, the transmission system is a key part of ship power transmission, and its sealing performance is directly related to the safe operation and long-term maintenance of the ship. Since ships often face harsh marine environments during navigation, such as high-salinity and high-humidity seawater environments, as well as the vibration and impact of the ship itself, the sealing of the transmission system becomes an important technical challenge. Traditional marine outboard engine transmission sealing devices often rely on a single sealing structure, such as gaskets or O-rings, etc. These sealing methods often have difficulty in maintaining long-term sealing performance when facing long-term seawater erosion and mechanical vibration. Therefore, we propose a marine outboard engine transmission sealing device to solve the above problems. Utility Model Content

[0003] The main purpose of the utility model is to provide a marine outboard engine transmission sealing device, which solves the problem that traditional marine outboard engine transmission sealing devices often rely on a single sealing structure, such as a sealing gasket or an O-ring, etc., and these sealing methods often have difficulty in maintaining long-term sealing performance when facing long-term seawater erosion and mechanical vibration.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A marine external engine transmission sealing device comprises an engine, wherein a No. 1 transmission shaft is installed at the output end of the engine, a gear box is installed at the lower end of the engine, the lower end of the No. 1 transmission shaft is connected to the gear box, a No. 2 transmission shaft is installed at one side of the gear box, a propeller is installed at one end of the No. 2 transmission shaft, a sealing mechanism is installed between the No. 1 transmission shaft, the gear box and the No. 2 transmission shaft, the sealing mechanism comprises a No. 1 sealing cover and a No. 2 sealing cover, the No. 1 sealing cover and the No. 2 sealing cover are snap-fitted and installed at the front and rear ends of the No. 1 transmission shaft, the gear box and the No. 2 transmission shaft, a No. 1 fitting block is installed at the lower end of the engine, the No. 1 fitting block is fitted with the inner upper ends of the No. 1 sealing cover and the No. 2 sealing cover, the inner lower ends of the No. 1 sealing cover and the No. 2 sealing cover are respectively equipped with No. 2 fitting blocks, the No. 2 fitting block is fitted with the No. 2 transmission shaft, the No. 1 sealing cover and the No. 2 sealing cover are respectively equipped with connecting frames on the sides away from each other, and a plurality of No. 1 bolts are installed between the connecting frames through threads.

[0006] Preferably, a connecting pipe is installed at one end of the No. 2 transmission shaft through a No. 2 bolt, a propeller is installed on the outside of the connecting pipe, and the inner wall of the connecting pipe is sleeved and installed on the outside of the No. 1 sealing cover and the No. 2 sealing cover.

[0007] Preferably, a No. 1 sealing block is installed on the rear side of the No. 1 sealing cover, a No. 1 sealing groove is provided at the front end of the No. 2 sealing cover, and the No. 1 sealing block is snap-fitted and installed inside the No. 1 sealing groove.

[0008] Preferably, a nut is threadedly mounted on the rear end of the shaft of the No. 1 bolt.

[0009] Preferably, a number of No. 2 sealing blocks are installed at the inner upper ends of the No. 1 sealing cover and the No. 2 sealing cover, a number of No. 2 sealing grooves are provided on the outer side of the No. 1 fitting block, and the No. 2 sealing blocks are respectively snap-fitted into the interior of the No. 2 sealing grooves.

[0010] Preferably, a No. 3 fitting block is installed on the outer side of the shaft of the No. 2 transmission shaft, and the No. 3 fitting block is fitted with the No. 2 fitting block, a plurality of No. 3 sealing blocks are installed on the inner wall of the No. 2 fitting block, a plurality of No. 3 sealing grooves are provided on the outer side of the No. 3 fitting block, and the No. 3 sealing blocks are respectively snap-fitted and installed inside the No. 3 sealing grooves.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) In the present invention, after the No. 1 sealing cover and the No. 2 sealing cover are connected by snapping, the initial sealing work can be achieved by the No. 1 sealing block and the No. 1 sealing groove. Then, the No. 2 sealing block and the No. 2 sealing groove and the No. 3 sealing block and the No. 3 sealing groove are snapped together to further improve the sealing effect of the upper and lower ends of the No. 1 sealing cover and the No. 2 sealing cover. At the same time, the connection pipe and the No. 1 sealing cover and the No. 2 sealing cover are fitted together to extend the overall sealing performance and improve the overall service life.

[0013] (2) In the utility model, the No. 2 transmission shaft is limited by the fitting between the No. 2 fitting block and the No. 3 fitting block, thereby reducing the vibration generated during the operation of the No. 2 transmission shaft, improving the overall stability and safety. At the same time, the cooperation between the No. 1 bolt and the connecting frame facilitates the user to disassemble and repair the No. 1 sealing cover and the No. 2 sealing cover, thereby reducing the user's work difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a marine outboard engine transmission sealing device of the utility model;

[0015] Figure 2 This is a front view structural schematic diagram of a marine outboard engine transmission sealing device of the utility model;

[0016] Figure 3 This is a side structural schematic diagram of a marine outboard engine transmission sealing device of the utility model;

[0017] Figure 4 The utility model is a marine outboard engine transmission sealing device Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0018] Figure 5 The utility model is a marine outboard engine transmission sealing device Figure 2 Schematic diagram of the cross-section structure at BB in the middle;

[0019] Figure 6 The utility model is a marine outboard engine transmission sealing device Figure 3 Schematic diagram of the cross-section structure at CC;

[0020] Figure 7 The utility model is a marine outboard engine transmission sealing device Figure 4 The enlarged structural diagram at D in the middle;

[0021] Figure 8 The utility model is a marine outboard engine transmission sealing device Figure 4 The enlarged schematic diagram of the structure at E in the middle;

[0022] Fig. 9 The utility model is a marine outboard engine transmission sealing device Figure 5 Enlarged structural diagram at F in the middle.

[0023] In the figure: 1. engine; 2. sealing mechanism; 201. sealing cover No. 1; 202. sealing cover No. 2; 203. sealing block No. 1; 204. sealing groove No. 1; 205. fitting block No. 1; 206. sealing block No. 2; 207. sealing groove No. 2; 208. fitting block No. 2; 209. sealing block No. 3; 210. sealing groove No. 3; 211. fitting block No. 3; 212. connecting frame; 213. bolt No. 1; 214. nut; 3. connecting pipe; 4. propeller; 5. bolt No. 2; 6. transmission shaft No. 1; 7. gear box; 8. transmission shaft No. 2. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figures 1 to 9As shown, the embodiment of the utility model proposes a marine external engine transmission sealing device, including an engine 1, a No. 1 transmission shaft 6 is installed at the output end of the engine 1, a gear box 7 is installed at the lower end of the engine 1, the lower end of the No. 1 transmission shaft 6 is connected to the gear box 7, a No. 2 transmission shaft 8 is installed on one side of the gear box 7, a propeller 4 is installed at one end of the No. 2 transmission shaft 8, a sealing mechanism 2 is installed between the No. 1 transmission shaft 6, the gear box 7 and the No. 2 transmission shaft 8, the sealing mechanism 2 includes a No. 1 sealing cover 201 and a No. 2 sealing cover 202, and the No. 1 sealing cover 201 and the No. 2 sealing cover 202 are engaged with each other. Installed at the front and rear ends of the No. 1 transmission shaft 6, the gear box 7 and the No. 2 transmission shaft 8, the lower end of the engine 1 is installed with a No. 1 fitting block 205, the No. 1 fitting block 205 is fitted with the inner upper ends of the No. 1 sealing cover 201 and the No. 2 sealing cover 202, the inner lower ends of the No. 1 sealing cover 201 and the No. 2 sealing cover 202 are respectively installed with No. 2 fitting blocks 208, the No. 2 fitting block 208 is fitted with the No. 2 transmission shaft 8, the No. 1 sealing cover 201 and the No. 2 sealing cover 202 are respectively installed on the side away from each other with connecting frames 212, and a number of No. 1 bolts 213 are installed between the connecting frames 212 through threads.

[0026] like Figures 3 to 9 As shown, in another embodiment of the utility model, one end of the No. 2 transmission shaft 8 is installed with a connecting pipe 3 through a No. 2 bolt 5, a propeller 4 is installed on the outside of the connecting pipe 3, the inner wall of the connecting pipe 3 is sleeved and installed on the outside of the No. 1 sealing cover 201 and the No. 2 sealing cover 202, a No. 1 sealing block 203 is installed on the rear side of the No. 1 sealing cover 201, a No. 1 sealing groove 204 is provided at the front end of the No. 2 sealing cover 202, the No. 1 sealing block 203 is snap-fitted and installed inside the No. 1 sealing groove 204, the rear end of the No. 1 bolt 213 is respectively threadedly installed with a nut 214, the No. 1 sealing cover 201 and the No. 2 sealing cover are connected to each other. A number of No. 2 sealing blocks 206 are installed on the inner upper end of the cover 202, a number of No. 2 sealing grooves 207 are provided on the outer side of the No. 1 fitting block 205, and the No. 2 sealing blocks 206 are respectively snap-fitted into the inside of the No. 2 sealing grooves 207, a No. 3 fitting block 211 is installed on the outer side of the shaft of the No. 2 transmission shaft 8, and the No. 3 fitting block 211 is fitted with the No. 2 fitting block 208, a number of No. 3 sealing blocks 209 are installed on the inner wall of the No. 2 fitting block 208, a number of No. 3 sealing grooves 210 are provided on the outer side of the No. 3 fitting block 211, and the No. 3 sealing blocks 209 are respectively snap-fitted into the inside of the No. 3 sealing grooves 210.

[0027] The user engages the No. 1 sealing cover 201 with the No. 2 sealing cover 202 so that the No. 1 fitting block 205, the No. 1 transmission shaft 6, the gear box 7 and the No. 2 transmission shaft 8 are all located between the No. 1 sealing cover 201 and the No. 2 sealing cover 202. Then, when the No. 1 sealing cover 201 and the No. 2 sealing cover 202 are engaged, the No. 1 sealing block 203 is engaged with the No. 1 sealing groove 204 to seal the gap between the No. 1 sealing cover 201 and the No. 2 sealing cover 202. At the same time, the No. 2 sealing block 206 is engaged with the No. 2 sealing groove 207 to further cooperate with the No. 1 fitting block 205 to improve the sealing performance of the No. 1 fitting block 205 and the No. 1 sealing groove. The sealing performance between the cover 201 and the second sealing cover 202 is improved, and the third sealing block 209 is also stuck in the interior of the third sealing groove 210, further improving the sealing performance between the second fitting block 208 and the third fitting block 211, and at the same time will not hinder the rotation of the second transmission shaft 8, and then the first bolt 213 and the nut 214 are used to fix the first sealing cover 201 and the second sealing cover 202, and then the user can install the connecting pipe 3 through the second bolt 5, so that the connecting pipe 3 is further sealed between the second fitting block 208 and the third fitting block 211, thereby improving the overall sealing performance and extending the overall service life;

[0028] Then, after the sealing mechanism 2 and the connecting pipe 3 are installed, the engine 1 can drive the No. 1 transmission shaft 6 to rotate, and then the No. 1 transmission shaft 6 inputs power into the gear box 7, and then the gear box 7 outputs the power to the No. 2 transmission shaft 8, allowing the No. 2 transmission shaft 8 to drive the connecting pipe 3 and the propeller 4 to rotate.

[0029] The working principle of a marine outboard engine transmission sealing device:

[0030] When in use, the user first snaps the No. 1 sealing cover 201 and the No. 2 sealing cover 202 together, so that the No. 1 fitting block 205, the No. 1 transmission shaft 6, the gear box 7 and the No. 2 transmission shaft 8 are all located between the No. 1 sealing cover 201 and the No. 2 sealing cover 202. Then, when the No. 1 sealing cover 201 and the No. 2 sealing cover 202 are snapped together, the No. 1 sealing block 203 is snapped into the inside of the No. 1 sealing groove 204 to seal the gap between the No. 1 sealing cover 201 and the No. 2 sealing cover 202. At the same time, the No. 2 sealing block 206 is snapped into the inside of the No. 2 sealing groove 207, further cooperating with the No. 1 fitting block 205 to improve the No. 1 fitting block 205. 05 and the sealing performance between the No. 1 sealing cover 201 and the No. 2 sealing cover 202, and the No. 3 sealing block 209 will also be stuck in the inside of the No. 3 sealing groove 210, further improving the sealing performance between the No. 2 fitting block 208 and the No. 3 fitting block 211, and at the same time will not hinder the rotation of the No. 2 transmission shaft 8, and then through the cooperation of the No. 1 bolt 213 and the nut 214, the No. 1 sealing cover 201 and the No. 2 sealing cover 202 are fixed, and then the user can install the connecting pipe 3 through the No. 2 bolt 5, so that the connecting pipe 3 can be further sealed between the No. 2 fitting block 208 and the No. 3 fitting block 211 to achieve the overall sealing work.

[0031] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A marine outboard engine transmission sealing device, comprising an engine (1), characterized in that: A first transmission shaft (6) is installed at the output end of the engine (1), a gear box (7) is installed at the lower end of the engine (1), the lower end of the first transmission shaft (6) is connected to the gear box (7), a second transmission shaft (8) is installed on one side of the gear box (7), a propeller (4) is installed at one end of the second transmission shaft (8), a sealing mechanism (2) is installed between the first transmission shaft (6), the gear box (7) and the second transmission shaft (8), the sealing mechanism (2) comprises a first sealing cover (201) and a second sealing cover (202), the first sealing cover (201) and the second sealing cover (202) are snap-fitted and installed on the first transmission shaft (6), the gear box (7) and the second transmission shaft (8), and the sealing mechanism (2) comprises a first sealing cover (201) and a second sealing cover (202), the first sealing cover (201) and the second sealing cover (202) are snap-fitted and installed on the first transmission shaft (6), the gear box (7) and the second transmission shaft (8). 7) and the front and rear ends of the No. 2 transmission shaft (8), the lower end of the engine (1) is equipped with a No. 1 fitting block (205), the No. 1 fitting block (205) fits with the inner upper ends of the No. 1 sealing cover (201) and the No. 2 sealing cover (202), the inner lower ends of the No. 1 sealing cover (201) and the No. 2 sealing cover (202) are respectively equipped with No. 2 fitting blocks (208), the No. 2 fitting block (208) fits with the No. 2 transmission shaft (8), the No. 1 sealing cover (201) and the No. 2 sealing cover (202) are respectively equipped with connecting frames (212) on the sides away from each other, and a plurality of No. 1 bolts (213) are installed between the connecting frames (212) through threads.

2. A marine outboard engine transmission sealing device according to claim 1, characterized in that: A connecting pipe (3) is installed at one end of the No. 2 transmission shaft (8) via a No. 2 bolt (5), a propeller (4) is installed on the outside of the connecting pipe (3), and the inner wall of the connecting pipe (3) is sleeved and installed on the outside of the No. 1 sealing cover (201) and the No. 2 sealing cover (202).

3. A marine outboard engine transmission sealing device according to claim 1, characterized in that: A No. 1 sealing block (203) is installed at the rear side of the No. 1 sealing cover (201), a No. 1 sealing groove (204) is provided at the front end of the No. 2 sealing cover (202), and the No. 1 sealing block (203) is snap-fitted and installed inside the No. 1 sealing groove (204).

4. A marine outboard engine transmission sealing device according to claim 1, characterized in that: The rear ends of the shafts of the No. 1 bolts (213) are respectively threadedly mounted with nuts (214).

5. The marine outboard engine transmission sealing device according to claim 1, characterized in that: A plurality of No. 2 sealing blocks (206) are installed at the inner upper ends of the No. 1 sealing cover (201) and the No. 2 sealing cover (202), and a plurality of No. 2 sealing grooves (207) are provided on the outer side of the No. 1 fitting block (205), and the No. 2 sealing blocks (206) are respectively snap-fitted and installed inside the No. 2 sealing grooves (207).

6. A marine outboard engine transmission sealing device according to claim 1, characterized in that: A No. 3 fitting block (211) is installed on the outer side of the shaft of the No. 2 transmission shaft (8), and the No. 3 fitting block (211) fits with the No. 2 fitting block (208). A plurality of No. 3 sealing blocks (209) are installed on the inner wall of the No. 2 fitting block (208). A plurality of No. 3 sealing grooves (210) are arranged on the outer side of the No. 3 fitting block (211), and the No. 3 sealing blocks (209) are respectively mounted in the interior of the No. 3 sealing grooves (210).