| 摘要 |
PURPOSE: To regulate the restoring force and vertically vibrating elasticity by filling the cylindrical surface of a pin and the space between a casing and a cover with a ring part covering the half axial extension part of a collar and two bearing bushes having inwardly thickened base parts. CONSTITUTION: A lower bearing bush 3a is inserted to a casing 1, and a pin shaft 8 is inserted to the casing 1 and protruded from the casing 1. The annular surface 6 of a collared pin 2 makes contact with the base part 3b of the lower bearing bush 3a, and a ring part 3c encloses half of the height of the cylindrical outer surface 5a of a collar 5. The bearing bush 3a is fitted to the collared pin 2 to enclose the remaining part of the cylindrical outer surface 5a by the ring part 3c. The base part 3b fills the space between the cylindrical surface 7 of a pin 4 and the casing 1. The vertically vibrating elasticity can be provided by changing the ring structure within the base part 3b, and the elastic effect of a groove 9 can be enhanced by a web for connecting a groove edge. According to this, limited restoring force and vertically vibrating elasticity can be imparted. |
