JPS6133313Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite engine mount that absorbs and damps engine vibrations using the elasticity of an elastic member and the resistance of a liquid.

Conventional composite mounts can effectively damp vibrations in the axial direction, that is, in the vertical direction of the engine, but cannot effectively damp vibrations in the vertical direction, that is, in the horizontal direction of the engine. The damping effect is worse than that of engine mounts made of rubber alone.

An object of the present invention is to provide a composite engine mount that can effectively damp vibrations not only in the axial direction but also in a direction perpendicular to the axial direction.

In order to achieve this purpose, according to the composite engine mount of the present invention, a columnar elastic member and a cylindrical elastic member are arranged with a predetermined gap inside and outside in the radial direction, and the columnar elastic member is The outer peripheral surface has a plurality of holes extending radially inward at an angle, and an incompressible fluid is sealed in the space between the columnar member and the cylindrical member.

Embodiments of the present invention will be described with reference to the drawings.

The cylindrical rubber 1 and the cylindrical rubber 2 are arranged concentrically with each other with a predetermined gap in the radial direction, and flat plate-shaped upper metal fittings 3 and lower metal fittings 4 are respectively fixed to the end faces on both sides in the axial direction. A bolt 5 to be fastened to the engine is provided at the center of the upper surface of the upper metal fitting 3, and a bolt hole 6 is provided in the lower metal fitting to pass a bolt to be tightened to the bracket.
The rubber membrane 7 has its peripheral edge fixed to the lower surface of the lower metal fitting 4, and defines a predetermined chamber 8. This chamber 8 communicates with an annular space 10 as a radial gap between the cylindrical rubber 1 and the cylindrical rubber 2 via an orifice 9 formed in the lower metal fitting 4. A large number of inclined holes 11 of a predetermined depth are formed in the outer circumferential surface of the cylindrical rubber 1 and are inclined upwardly or downwardly (upward in the drawing) toward the inside in the radial direction. Oil 12 as an incompressible fluid enters chamber 8 and annular space 1
It is filled to 0 and then sealed.

The mount is compressed or stretched in the axial direction by the vertical vibration of the engine. At this time, the inclined hole 11 is compressed or stretched in the axial direction of the mount, and as a result, the volume of the inclined hole 11 changes, and as the oil 12 enters or drains into the inclined hole 11, the cylindrical member 1 The stretch resistance acts as a vibration damper. Furthermore, the elasticity of the rubbers 1 and 2 in the axial direction and the oil 12
The resistance created during the passage also acts as a damper for axial vibrations.

Due to the horizontal vibration of the engine, the upper metal fitting 3 and the lower metal fitting 4 are displaced in the horizontal direction. As a result, the inclined hole 11 is compressed or stretched in the radial direction of the mount. As a result, the volume of the inclined hole 11 changes, and as the oil 12 enters or exits the inclined hole 11, resistance is generated in the horizontal columnar member 1, and this resistance damps the horizontal vibration of the engine. .

As described above, according to the present invention, a plurality of inclined holes are formed on the outer peripheral surface of the columnar elastic rubber, and this prevents incompressible fluid from entering and discharging into the inclined holes when the engine vibrates in the vertical and horizontal directions. Due to the accompanying resistance of the columnar member, vertical and horizontal vibrations of the engine can be effectively damped.

[Brief explanation of the drawing]

The drawing is a cross-sectional view of an embodiment of the present invention. 1... Cylindrical rubber, 2... Cylindrical rubber, 10...
Annular space, 12...oil.

Claims (1)

[Scope of utility model registration request] A columnar elastic member and a cylindrical elastic member are arranged with a predetermined gap between the inner and outer sides in the radial direction, and the columnar elastic member has a plurality of holes on its outer circumferential surface that extend radially inward at an angle with respect to the axial direction of the columnar elastic member. A composite engine mount, characterized in that an incompressible fluid is sealed in a space between a columnar member and a cylindrical member.