JPH04113349U - Vibration-proof elastic body support structure - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention is designed to improve the
When the engine E is pushed forward by the thrust force P from the
This solves the problem that a torsional moment is applied to the vibration-proof elastic bodies 6 and 7, which shortens the life of the vibration-proof elastic bodies 6 and 7. [Structure] Even when the engine E and the engine side support fitting 2 are pulled by the thrust force P from the screw 15, the vibration-proofing upper fitting 3 does not twist and moves back and forth in parallel to the thrust force P. A height adjustment bolt 4 is installed between the engine side support metal fitting 2 and the vibration-proof upper metal fitting 3 so that it can move.
and a rotation prevention rod 5 are arranged in series.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is designed to support a main marine engine on an engine stand with a vibration-proof elastic body in between. This improves the durability of the vibration-proof elastic body.

0002

[Conventional technology]

When the vibration-proof elastic body cannot be used in the conventional vibration-proof elastic body support structure In order to safely and reliably support the engine, bolts and nuts are The technology for fixing between the engine stand and the engine side support metal fittings is known to the public. be. For example, there is a technique described in Japanese Utility Model Application Publication No. 56-27438. Also follow In the past, as shown in Figure 1, a torsional moment was generated due to thrust force, and the height of the engine was adjusted. Slippage occurred in the four parts of the height adjustment bolt, and the height adjustment bolt was shaped like the one-dot chain line in Figure 1. The vibration isolating elastic body twists around point 4, which causes the inclination angle of the vibration isolating elastic body to change. As a result, the desired vibration damping performance cannot be obtained.

0003

[Problems that the idea should solve]

This invention is applied to the vibration-proof elastic body of the engine E in a marine main engine that rotates a screw. Anti-vibration when supported at an angle and receives thrust from the engine's propulsive force. The purpose is to prevent the rubber from twisting and falling.

0004

[Means to solve the problem]

The problems to be solved by this invention are as described above, and the following are the means for solving the problems. Explain. That is, in the vibration-proof elastic body support part of the marine main engine, the A vibration-proof lower metal fitting 1 is fixedly installed, vibration-proof elastic bodies 6 and 7 are placed on the vibration-proof lower metal fitting 1, In the configuration in which the vibration isolating upper metal fitting 3 is arranged on the vibration isolating elastic bodies 6 and 7, the vibration isolating upper side Install a locking rod 5 and a height adjustment bolt 4 between the metal fitting 3 and the engine side support metal fitting 2. , are arranged in series in the direction in which the thrust force of the marine main engine is applied.

[0005]

[Effect]

In order to overcome the drawbacks of the conventional technology, a rotation stopper is installed in series with the height adjustment bolt 4 in the front and back direction. Since the fixing rod 5 is arranged, the vibration isolating elastic bodies 6 and 7 are prevented from twisting or falling. Therefore, a predetermined vibration damping performance can be obtained. In other words, using only the height adjustment bolt 4 Torsional moment between engine side support fitting 2 and vibration isolating upper fitting 3 occurs, but since the anti-rotation rod 5 is placed in the series position, , it becomes impossible to twist between the engine side support fitting 2 and the vibration isolating upper metal fitting 3. .

[0006]

【Example】

Next, an example will be described. Figure 1 shows the engine when there is no rotation stopper rod 5. FIG. 2 is a drawing showing a state in which torsion has occurred between the front side support fitting 2 and the vibration isolating upper side fitting 3. is a perspective view of the vibration-proof elastic body inclined support structure of the present invention, FIG. 3 is also a rear view, and FIG. 4 is a conventional structure. Figure 5 is a perspective view of the vibration-proof elastic body support structure of the conventional structure. Figure 6 is a perspective view of a state where a torsional moment is generated. It is a rear view of a state.

[0007] In FIG. 1, the crankshaft 16 is projected rearward from the engine E, and the crankshaft 16 is A screw shaft is connected to the shaft 16 to drive the screw 15. And the school As the screw 15 rotates, the thrust force P acts on the engine E in a direction that pushes it forward. It is. The disadvantages of the prior art will be explained in detail with reference to FIGS. 4, 5, and 6. school The thrust force P generated by the screw 15 acts as shown by the arrow. The thrust force P As the engine side support bracket 2 moves forward, the height adjustment bolt 4 is A situation occurs where you are dragged forward. Therefore, the lower end of the height adjustment bolt 4 is attached to the upper vibration-proof metal plate. Pull the tool 3 forward and it will be in the state shown by the dashed line in FIG. Twisting of the vibration isolating upper metal fitting 3 As a result, the upper vibration-proof elastic body holding plate 9 to which the vibration-proof upper bracket 3 is fixed is tilted, so that the upper Vibration-proof elastic body 6 sandwiched between vibration-proof elastic body clamping plate 9 and lower vibration-proof elastic body clamping plate 14 ・7 receives the torsional moment. When the torsional moment occurs, the anti-vibration bullet Since tension and compression act on the elastic bodies 6 and 7 at the same time, the vibration-proof elastic bodies 6 and 7 act as shown in FIG. A force is applied in the direction of angle θ2, which is a direction inclined with respect to 7. force in that direction is not the load direction planned for the vibration isolating elastic bodies 6 and 7, so the durability is This results in a decrease in elasticity or a decrease in elasticity. Also, conventionally the engine side support metal Only the height adjustment bolt 4 is interposed between the fixture 2 and the vibration-proof upper metal fixture 3, and the height adjustment bolt By adjusting the adjustment nuts 12 and 18 screwed onto the bolt 4 up and down, the engine The height of E relative to the engine stand 8 was adjustable.

[0008] In this way, the present invention uses the thrust force P to connect the engine E and the engine side support fitting 2. The anti-vibration upper bracket 3 will not twist or tilt when it is pulled forward. It is constructed in such a way that it is The configuration of the present invention will be explained with reference to FIGS. 2 and 3. Conventionally, the height of the engine E was adjusted between the engine side support bracket 2 and the vibration-proof upper bracket 3. Only the height adjustment bolt 4 for knotting was installed, but the height adjustment bolt 4 and In series and overlappingly in the direction of the thrust force P of the screw 15, the detent rod 5 is arranged. The anti-rotation rod 5 is fixed to the anti-vibration upper bracket 3. However, it is loosely fitted into the loose fitting hole on the side of the height adjustment bolt 4, and the height Constructed so as not to interfere with the vertical adjustment of the adjustment bolt 4 by the adjustment nuts 12 and 18. That's what I'm doing. However, the height adjustment bolt 4 and the rotation stopper rod 5 are Arranged in series parallel to the direction of thrust force P between the side support bracket 2 and the vibration-proof upper bracket 3 By doing so, when the engine side support bracket 2 side is pulled, it is possible to prevent vibrations. The side bracket 3 can only move straight in a direction parallel to the thrust force P. Ru. Therefore, no torsional moment is applied to the vibration-proof elastic bodies 6 and 7, and the corners shown in FIG. Since the load is applied only in the direction of degree θ1, the load is applied only in the tensile and compressive directions. That's what happens. The fixing screw 10 connects the vibration-proof elastic body holding plate 9 and the vibration-proof upper metal fitting 3. to prevent the vibration isolating upper metal fitting 3 from rotating relative to the vibration isolating elastic body holding plate 9 while the is fixed. A rotation stopper 13 is interposed therebetween.

[0009]

[Effect of the idea]

Since the present invention is constructed as described above, it has the following effects. That is, , it is possible to prevent the vibration isolating elastic bodies 6 and 7 from twisting and falling due to the thrust force P. In this way, the vibration isolating effect of the vibration isolating elastic bodies 6 and 7 arranged in an inclined support state can be obtained as desired. This is possible. In addition, the engine height can be adjusted while maintaining the above-mentioned anti-vibration characteristics. This structure made maintenance easier. Also, the height is the same as before. While the adjustment bolt 4 is supported by one, the present invention has a height adjustment bolt 4 and a rotation stopper. Since it is supported by two rods 5, it is advantageous in terms of the strength of the bolt.

[Brief explanation of drawings]

FIG. 1 is a drawing showing a state in which torsion occurs between an engine-side support fitting 2 and a vibration-proofing upper fitting 3 in the absence of a rotation prevention rod 5. FIG.

FIG. 2 is a perspective view of the vibration-proof elastic body support structure of the present invention.

FIG. 3 is a rear view as well.

FIG. 4 is a perspective view of a conventional vibration-proof elastic body support structure.

FIG. 5 is a perspective view of a conventional structure in which a torsional moment is generated due to a thrust force.

FIG. 6 is a rear view in a state where a torsional moment is also generated.

[Explanation of symbols]

1 Anti-vibration lower bracket 2 Engine side support bracket 3 Vibration-proof upper bracket 4 Height adjustment bolt 5 Anti-rotation rod 6,7 Vibration-proof elastic body 8 Engine stand 9 Upper vibration-proof elastic body holding plate 10 Fixing screw 13 Rotation stopper 14 Lower vibration-proof elastic body holding plate 15 screw 16 Crankshaft

Claims (1)

[Scope of utility model registration request] Claim 1: In a vibration-proof elastic body support section of a marine main engine, a vibration-proof lower metal fitting 1 is fixedly installed on the engine stand 8, and a vibration-proof elastic body 6 is mounted on the vibration-proof lower metal fitting 1. - In a configuration in which the vibration-proof upper metal fitting 3 is placed on the vibration-proof elastic bodies 6 and 7, a detent rod 5 is placed between the vibration-proof upper metal fitting 3 and the engine-side support metal fitting 2, A vibration-proof elastic body support structure characterized in that height adjustment bolts 4 are arranged in series in the direction in which thrust force of a marine main engine acts.