Viscous fluid-filled damper
Provided is a container body including a flexible portion made of a rubber-like elastic material and an annular connection portion made of a hard material in the shape of a substantially flat plate and having an upper surface to which the flexible portion is firmly fixed and a lower surface to which the lid body is firmly fixed. The flexible portion is provided, on a firm fixation region thereof that is firmly fixed to the annular connection portion, with a collar joint portion protruding widely in the direction of a plane of the annular connection portion. Therefore, the container body and the lid body are firmly coupled to each other, and the viscous fluid-filled damper can be reduced in height.
1. A viscous fluid-filled damper for damping vibrations transmitted between a supporting body and a supported body, comprising:
a container body;
a lid body for closing an opening end of the container body; and
a viscous fluid filled in an inner space enclosed by the container body and the lid body, wherein:
the container body is provided with a flexible portion made of an elastic material, and an annular connection portion made of a hard resin with a shape of a substantially flat plate and having an upper surface to which the flexible portion is firmly fixed and a lower surface to which the lid body is firmly fixed, the upper surface and the lower surface extending between the flexible portion and the lid body;
the flexible portion has, on a firm fixation region thereof that is firmly fixed to the annular connection portion, a collar joint portion protruding widely in a direction of a plane of the annular connection portion;
the flexible portion has a bellows portion with a corrugated longitudinal cross-sectional shape that is deformed through vibrations;
the bellows portion has a valley portion formed as a depressed portion, and a mountain portion formed as a projecting portion;
the valley portion has a bottom located on the lid body side with respect to a top of the mountain portion to allow the bellows portion to be displaced by a large distance in a horizontal direction and a vertical direction and the bottom of the valley portion is spaced from the lid body by a first distance;
the flexible portion is provided, at an end thereof opposite to the annular connection portion, with a coupling top portion which is coupled to one of the supporting body and the supported body;
the coupling top portion includes a bottom surface spaced from the lid body by a second distance that is greater than the first distance;
the coupling top portion includes a top surface spaced from the bottom surface;
the top surface is external to the inner space and is spaced from the end of the flexible portion by a third distance; and
the bottom surface contacts the viscous fluid and is spaced from the end of the flexible portion by a fourth distance.
2. A viscous fluid-filled damper for damping vibrations transmitted between a supporting body and a supported body, comprising:
a container body;
a lid body for closing an opening end of the container body; and
a viscous fluid filled in an inner space enclosed by the container body and the lid body, wherein:
the container body is provided with a flexible portion made of an elastic material, a coupling top portion made of a hard resin having a shaft receiving hole; and an annular connection portion made of a hard resin with a shape of a substantially flat plate and having an upper surface to which the flexible portion is firmly fixed, the coupling top portion is separate and distinct from the annular connection portion;
the flexible portion has, on a firm fixation region thereof that is firmly fixed to the annular connection portion, a collar joint portion protruding widely in a direction of a plane of the annular connection portion;
the flexible portion is provided with the coupling top portion which is coupled to one of the supporting body and the supported body; and
the coupling top portion has a bottom surface exposed to the inner space of the container body.
3. A viscous fluid-filled damper according to claim 1 or 2 , wherein:
the collar joint portion is obliquely formed from the horizontal direction with respect to the lid body; and
the firm fixation region between the collar joint portion and the annular connection portion has a projection plane projected on the lid body that has a horizontal width larger than a thickness of the bellows portion.
4. A viscous fluid-filled damper according to claim 1 or 2 , wherein the collar joint portion is so formed as to extend toward an inner space of the viscous fluid-filled damper.
5. A viscous fluid-filled damper according to claim 1 or 2 , wherein the coupling top portion is so formed as to be longer in a horizontal direction than in a vertical direction.
6. A viscous fluid-filled damper according to claim 1 or 2 wherein the coupling top portion does not substantially protrude toward an inner space of the container body.
7. A viscous fluid-filled damper according to claim 1 , wherein the coupling top portion has a shaft receiving hole that corresponds in shape to a shaft provided on one of the supporting body and the supported body to receive the shaft.
8. A viscous fluid-filled damper according to claim 1 or 2 , wherein:
the annular connection portion has a rubber-side recess portion for accommodating the collar joint portion, and a lid-side recess portion for accommodating the lid body; and
the rubber-side recess portion and the lid-side recess portion are both wider in a horizontal direction than in a vertical direction.
9. A viscous fluid-filled damper according to claim 1 or 2 , wherein the annular connection portion is provided with a coupling portion coupled to one of the supporting body and the supported body.
10. A viscous fluid-filled damper according to claim 1 , wherein
the lid body is made of a hard resin, and
the lid body is fixed to the annular connection portion by ultrasonic fusing.
11. A viscous fluid-filled damper according to claim 1 or 2 , wherein the coupling top portion is formed of hard resin material that is different from the elastic material of the flexible portion.
12. A viscous fluid-filled damper according to claim 1 , wherein the fourth distance is substantially less than the third distance.
13. A viscous fluid-filled damper according to claim 1 or 2 , wherein the coupling top portion is separate and distinct from the flexible portion.
14. A viscous fluid-filled damper according to claim 1 or 2 , wherein the second distance is greater than the first distance in an unloaded state of the viscous fluid-filled damper.
15. A viscous fluid-filled damper according to claim 1 or 2 , wherein the flexible portion is located between the coupling top portion and the annular connection portion.
16. A viscous fluid-filled damper, for damping vibrations transmitted between a supporting body and a supported body, comprising:
a container body;
a lid body for closing an opening end of the container body; and
a viscous fluid filled in an inner space enclosed by the container body and the lid body, wherein:
the container body is provided with a flexible portion made of an elastic material, and an annular connection portion made of a hard resin with a shape of a substantially flat plate and having an upper surface to which the flexible portion is firmly fixed and a lower surface to which the lid body is firmly fixed, the upper surface and the lower surface extending between the flexible portion and the lid body;
the flexible portion has on a firm fixation region thereof that is firmly fixed to the annular connection portion, a collar joint portion protruding widely in a direction of a plane of the annular connection portion;
the flexible portion has a bellows portion with a corrugated longitudinal cross-sectional shape that is deformed through vibrations;
the bellows portion has a valley portion formed as a depressed portion, and a mountain portion formed as a projecting portion;
the valley portion has a bottom located on the lid body side with respect to a top of the mountain portion to allow the bellows portion to be displaced by a large distance in a horizontal direction and a vertical direction and the bottom of the valley portion is spaced from the lid body by a first distance;
the flexible portion is provided, at an end thereof opposite to the annular connection portion, with a coupling top portion which is coupled to one of the supporting body and the supported body;
the coupling top portion includes a bottom surface spaced from the lid body by a second distance that is greater than the first distance; and
the coupling top portion has a bottom surface exposed to the inner space of the container body.
17. A viscous fluid-filled damper for damping vibrations transmitted between a supporting body and a supported body, comprising:
a container body;
a lid body for closing an opening end of the container body; and
a viscous fluid filled in an inner space enclosed by the container body and the lid body, wherein:
the container body is provided with a coupling top portion made of a hard resin which is coupled to one of the supporting body and the supported body, a flexible portion made of an elastic material, and an annular connection portion made of a hard resin and having an upper surface to which the flexible portion is firmly fixed and a lower surface to which the lid body is firmly fixed, the upper surface and the lower surface extending between the flexible portion and the lid body;
the coupling top portion is so formed as to be larger in width than in height;
the flexible portion has a bellows portion with a corrugated longitudinal cross-section that is deformed through vibrations, and a collar joint portion firmly fixed to the annular connection portion;
the bellows portion has a valley portion formed as a depressed portion, and a mountain portion formed as a projecting portion;
the valley portion has a bottom located on the lid body side with respect to a top of the mountain portion; the collar joint portion protrudes widely in a horizontal direction;
the annular connection portion assumes a shape of a substantially flat plate; and
the coupling top portion has a bottom surface exposed to the inner space of the container body.
18. A viscous fluid-filled damper according to claim 1 or 2 , wherein:
the firm fixation region between the collar joint portion and the annular connection portion has a horizontal width with respect to the lid body that is larger than a thickness of the bellows portion.