To provide a vibration-proof bush used for a connecting site between a vehicle body and a vibration source such as an engine and a wheel in a vehicle such as an automobile, the vibration-proof bush capable of further decreasing noise in the vehicle.
A vibration-proof bush includes a shaft member 2, an outer cylinder 3 extending parallel to an axis 53 and enclosing the shaft member 2, a rubber elastic body 1 interposed between the shaft member 2 and the outer cylinder 3, and a pair of bored parts 4 axially penetrating the rubber elastic body 1. The pair of bored parts 4 is arranged at positions that pinch the shaft member 2 in a first direction 51 perpendicular to the axis in the rubber elastic body 1, and is extended in a second direction 52 perpendicular to the axis and orthogonal to the first direction 51 perpendicular to the axis. A bridge membrane 11 is included in the bored part 4, the membrane spanning from a side close to the outer cylinder 3 to a side close to the shaft member 2. The bridge membrane 11 is extended along the axial direction or the second direction 52 perpendicular to the axis, and is curved along a smooth curved line in a cross-sectional shape in a film thickness direction.
ISHIMOTO YOSHITAKA
| JPH0272829U | 1990-06-04 | |||
| JPH07280013A | 1995-10-27 | |||
| JP2010031908A | 2010-02-12 |
Masato Tsuda
Tetsuji Nakamura
Katsuyuki Tomita
Husband
Ariyoshi Yasuomi