A kind of marine outboard engine thrust shaft vibration reduction device

Abstract

The utility model provides a marine external engine thrust shaft damping device, which relates to the technical field of engine accessories, including a marine engine, a thrust shaft is rotatably mounted at one end of the marine engine, a propeller is mounted at one end of the thrust shaft shaft body, a sleeve is fixedly mounted on the side of the marine engine close to the propeller through a bracket, a plurality of arc grooves are opened on the inner wall surface of the sleeve, and a connecting ring is mounted at one end of the sleeve. In the utility model, a staff member starts the marine engine, so that the thrust shaft drives the propeller to rotate, so that the hull travels on the sea surface. When wind and waves come and the hull travels on an unstable sea surface, when the thrust shaft vibrates, the thrust shaft transmits the vibration to the first damping sleeve, and the first damping sleeve can buffer the vibration generated by the thrust shaft, thereby avoiding the situation that the thrust bearing is aggravated when the thrust shaft generates longitudinal vibration, or even damages the thrust bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of engine accessories, in particular to a thrust shaft damping device for an outboard marine engine. Background Art

[0002] An outboard marine engine, commonly known as an outboard motor, is a propulsion engine installed on the outside of the hull (side), usually suspended on the outside of the transom. This type of engine is highly integrated and easy to install and purchase. It is the preferred power source for personal leisure and entertainment boats and is also widely used in fisheries, commercial operations, and government law enforcement. When the hull is traveling on the sea, the thrust shaft of the engine drives the propeller to rotate. When wind and waves come and the sea surface is unstable, the propeller is prone to uneven thrust, causing the thrust shaft to vibrate longitudinally. This vibration will cause the thrust bearing connected to the thrust shaft to wear more severely and may even damage the thrust bearing. Utility Model Content

[0003] The main purpose of the utility model is to provide a marine external engine thrust shaft damping device, which can effectively solve the problem in the background technology that when the hull is traveling on the sea, the engine's thrust shaft drives the propeller to rotate, and when wind and waves come and the sea surface is unstable, the propeller is prone to produce uneven thrust, causing the thrust shaft to produce longitudinal vibration. Such vibration will cause the thrust bearing connected to the thrust shaft to wear more severely, and may even damage the thrust bearing.

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

[0005] A marine external engine thrust shaft damping device comprises a marine engine, one end of the marine engine is rotatably mounted with a thrust shaft, and one end of the thrust shaft is mounted with a propeller;

[0006] A sleeve is fixedly installed on the side of the marine engine close to the propeller through a bracket, a plurality of arc grooves are opened on the inner wall surface of the sleeve, a connecting ring is installed on one end of the sleeve, a plurality of rotating rods are rotatably installed on the connecting ring close to the side of the sleeve, and each of the rotating rods is sleeved with a first shock-absorbing sleeve.

[0007] Preferably, each of the rotating rod shafts is fixedly mounted with a plurality of limit blocks, and each of the inner wall surfaces of the first shock absorbing sleeves is provided with a plurality of limit grooves, and each of the limit blocks is respectively inserted and matched with a corresponding limit groove.

[0008] Preferably, each of the first shock-absorbing sleeves has a cavity inside, and a plurality of second shock-absorbing sleeves are fixedly installed between two sides of the inner wall of each cavity.

[0009] Preferably, a limiting ring is sleeved on one side of the shaft of each rotating rod;

[0010] A threaded section is arranged on the other side of each rotating rod shaft, a movable ring is threadedly arranged on the surface of each threaded section, and each of the first shock-absorbing sleeves is arranged between the corresponding limiting ring and the movable ring.

[0011] Preferably, each of the connecting rings is fixedly mounted on one end of the sleeve by bolts.

[0012] Preferably, a plurality of arc-shaped plates are fixedly mounted on one side of the inner wall of each arc-shaped groove, a support groove is provided on the surface of each arc-shaped plate close to the corresponding rotating rod, and a rotating column is rotatably mounted in each supporting groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) The staff starts the marine engine to make the thrust shaft drive the propeller to rotate, so that the hull travels on the sea. When wind and waves come and the hull travels on the unstable sea, when the thrust shaft vibrates, the thrust shaft transmits the vibration to the first shock-absorbing sleeve. The first shock-absorbing sleeve can buffer the vibration generated by the thrust shaft, thereby avoiding the situation where the thrust bearing is aggravated by the longitudinal vibration of the thrust shaft, or even damages the thrust bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a marine outboard engine thrust shaft damping device of the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of the structure of a thrust shaft damping device for an outboard marine engine of the utility model;

[0017] Figure 3 The utility model is a marine outboard engine thrust shaft vibration reduction device Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0018] Figure 4 The utility model is a marine outboard engine thrust shaft vibration reduction device Figure 2 Schematic diagram of the cross-section structure at BB in the middle;

[0019] Figure 5 The utility model is a marine outboard engine thrust shaft vibration reduction device Figure 2 Schematic diagram of the cross-section structure at CC;

[0020] Figure 6 The utility model is a marine outboard engine thrust shaft vibration reduction device Figure 3 A magnified schematic diagram of the structure at center A;

[0021] Figure 7The utility model is a marine outboard engine thrust shaft vibration reduction device Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0022] Figure 8 The utility model is a marine outboard engine thrust shaft vibration reduction device Figure 5 A magnified schematic diagram of the structure at center C.

[0023] In the figure: 1, marine engine; 2, thrust shaft; 3, propeller; 4, bracket; 5, sleeve; 501, arc groove; 6, connecting ring; 7, rotating rod; 8, first shock-absorbing sleeve; 9, limit block; 10, limit groove; 11, cavity; 12, second shock-absorbing sleeve; 13, limit ring; 14, threaded section; 15, moving ring; 16, bolt; 17, arc plate; 18, rotating column. 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 Figure 1-Figure 6 As shown, a marine external engine thrust shaft vibration reduction device comprises a marine engine 1, a thrust shaft 2 is rotatably mounted on one end of the marine engine 1, and a propeller 3 is mounted on one end of the thrust shaft 2;

[0026] A sleeve 5 is fixedly installed on the side of the marine engine 1 close to the propeller 3 through a bracket 4, and a plurality of arc grooves 501 are opened on the inner wall surface of the sleeve 5. A connecting ring 6 is installed at one end of the sleeve 5. A plurality of rotating rods 7 are rotatably installed on the connecting ring 6 close to the side of the sleeve 5, and the shaft of each rotating rod 7 is sleeved with a first shock-absorbing sleeve 8.

[0027] The staff starts the marine engine 1, so that the thrust shaft 2 drives the propeller 3 to rotate, so that the hull travels on the sea. When wind and waves come and the hull travels on the unstable sea, when the thrust shaft 2 vibrates, the thrust shaft 2 transmits the vibration to the first shock-absorbing sleeve 8. The first shock-absorbing sleeve 8 can buffer the vibration generated by the thrust shaft 2, so as to avoid the thrust bearing from being aggravated in wear or even damaged when the thrust shaft 2 generates longitudinal vibration.

[0028] Under the fitting effect of the first damping sleeve 8 and the thrust shaft 2, when the thrust shaft 2 rotates, the rotating rod 7 drives the first damping sleeve 8 to rotate, so that the first damping sleeve 8 better adapts to the rotation of the thrust shaft 2, and reduces the wear caused by fixed friction, thereby extending the service life of the first damping sleeve 8 and the thrust shaft 2 and reducing the frequency of maintenance and replacement.

[0029] In another embodiment of the utility model, each rotating rod 7 is fixedly installed with a plurality of limit blocks 9, and the inner wall surface of each first shock-absorbing sleeve 8 is provided with a plurality of limit grooves 10, and each limit block 9 is respectively inserted and matched with the corresponding limit groove 10.

[0030] Under the limiting action of the limiting block 9 and the limiting groove 10, the first shock absorbing sleeve 8 is prevented from rotating relative to the rotating rod 7 when following the rotating rod 7, resulting in the first shock absorbing sleeve 8 being unable to adapt to the rotation of the thrust shaft 2.

[0031] In another embodiment of the utility model, each first shock-absorbing sleeve 8 has a cavity 11 formed inside, and a plurality of second shock-absorbing sleeves 12 are fixedly installed between two sides of the inner wall of each cavity 11 .

[0032] By providing the cavity 11 and the second shock-absorbing sleeve 12, after the thrust shaft 2 transmits the vibration to the first shock-absorbing sleeve 8, the first shock-absorbing sleeve 8 can transmit the vibration to the second shock-absorbing sleeve 12, so that the vibration energy is more buffered during the transmission process, thereby improving the shock-absorbing effect.

[0033] In another embodiment of the utility model, a limiting ring 13 is sleeved on one side of the shaft of each rotating rod 7;

[0034] A threaded section 14 is provided on the other side of the shaft of each rotating rod 7 , and a movable ring 15 is threadedly provided on the surface of each threaded section 14 . Each first shock-absorbing sleeve 8 is respectively provided between the corresponding limiting ring 13 and the movable ring 15 .

[0035] Each connecting ring 6 is fixedly mounted on one end of the sleeve 5 by means of bolts 16 .

[0036] The staff removes the bolt 16 and then moves the connecting ring 6 to move the first shock-absorbing sleeve 8 to the outside of the sleeve 5. The staff then rotates the moving ring 15 to move it along the threaded section 14 and finally disengage from the rotating rod 7. The staff then pulls the first shock-absorbing sleeve 8 to disengage the limit block 9 from the limit groove 10, allowing the staff to quickly disassemble and replace the damaged first shock-absorbing sleeve 8 to maintain the shock-absorbing effect.

[0037] In another embodiment of the utility model, a plurality of arc plates 17 are fixedly installed on one side of the inner wall of each arc groove 501, and a support groove is provided on the surface of each arc plate 17 close to the corresponding rotating rod 7, and a rotating column 18 is rotatably installed in each supporting groove.

[0038] By providing the arc plate 17, one end of the shaft of the rotating rod 7 can be supported to prevent the rotating rod 7 from bending for a long time. By providing the rotating column 18, the wear between the rotating rod 7 and the arc plate 17 is reduced, and the service life of the rotating rod 7 and the arc plate 17 is extended.

[0039] The working principle of a marine outboard engine thrust shaft damping device:

[0040] During use, the staff starts the marine engine 1, so that the thrust shaft 2 drives the propeller 3 to rotate, so that the hull travels on the sea. When wind and waves come and the hull travels on the unstable sea, when the thrust shaft 2 vibrates, the thrust shaft 2 transmits the vibration to the first shock-absorbing sleeve 8. The first shock-absorbing sleeve 8 can buffer the vibration generated by the thrust shaft 2, thereby avoiding the situation where the thrust bearing is aggravated by the longitudinal vibration of the thrust shaft 2, or even damages the thrust bearing.

[0041] 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 thrust shaft damping device, comprising a marine engine (1), characterized in that: A thrust shaft (2) is rotatably mounted on one end of the marine engine (1), and a propeller (3) is mounted on one end of the thrust shaft (2); A sleeve (5) is fixedly mounted on the side of the marine engine (1) close to the propeller (3) through a bracket (4); a plurality of arc-shaped grooves (501) are provided on the inner wall surface of the sleeve (5); a connecting ring (6) is mounted on one end of the sleeve (5); a plurality of rotating rods (7) are rotatably mounted on the side of the connecting ring (6) close to the sleeve (5); and a first shock-absorbing sleeve (8) is sleeved on the shaft of each rotating rod (7).

2. A marine outboard engine thrust shaft vibration reduction device according to claim 1, characterized in that: A plurality of limit blocks (9) are fixedly mounted on the shaft of each rotating rod (7), a plurality of limit grooves (10) are opened on the inner wall surface of each first shock-absorbing sleeve (8), and each limit block (9) is respectively inserted and matched with a corresponding limit groove (10).

3. A marine outboard engine thrust shaft damping device according to claim 2, characterized in that: Each of the first shock-absorbing sleeves (8) has a cavity (11) formed therein, and a plurality of second shock-absorbing sleeves (12) are fixedly mounted between two sides of the inner wall of each of the cavities (11).

4. A marine outboard engine thrust shaft vibration reduction device according to claim 3, characterized in that: A limiting ring (13) is sleeved on one side of the shaft of each rotating rod (7); A threaded section (14) is provided on the other side of the shaft of each rotating rod (7), a movable ring (15) is threadedly provided on the surface of each threaded section (14), and each first shock-absorbing sleeve (8) is respectively provided between the corresponding limiting ring (13) and the movable ring (15).

5. A marine outboard engine thrust shaft vibration reduction device according to claim 4, characterized in that: Each of the connecting rings (6) is fixedly mounted on one end of the sleeve (5) by means of bolts (16).

6. The thrust shaft damping device for an outboard marine engine according to claim 1, characterized in that: A plurality of arc-shaped plates (17) are fixedly mounted on one side of the inner wall of each arc-shaped groove (501), a support groove is provided on the surface of one side of each arc-shaped plate (17) close to the corresponding rotating rod (7), and a rotating column (18) is rotatably mounted in each supporting groove.

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