Patent ID: 8540220
Filing Date: 2013-09-24
Classification: B61F,F16F

Abstract:
1. An air spring for a vehicle, the air spring being to be used in a vehicle comprising a rail-way truck and a vehicle body, being to be mounted between the railway truck and the vehicle body, and comprising: a diaphragm placed between an upper board to be connected to the vehicle body and a lower board; and a stopper rubber placed between a lower plate to be connected to the railway truck and the lower board; the air spring further comprising a displacement-restraining mechanism that comprises: a first restraining member placed on either one of the lower plate and the lower board; and a second restraining member placed on the other; wherein in a state where the vehicle provided with the air spring is running along a straight track, when the traveling direction of the vehicle is defined as the back-and-forth direction and the direction perpendicular to the back-and-forth direction in a horizontal plane is defined as the left-right direction: the first restraining member has left and right outer surfaces positioned in the left and right directions, respectively, away from the center of a horizontal cross section of the first restraining member; the second restraining member has restraining wall surfaces located at the left side and right side of the first restraining member and facing the left and right outer surfaces of the first restraining member, respectively; and the shape of the restraining wall surfaces is formed such that in the relative positional relationship between the first restraining member and the second restraining member, when the first or second restraining member is displaced along a displacement trajectory that delineates an arc around a center of the railway truck axis of the railway truck of the vehicle, the spacing between the left outer surface of the first restraining member and the left-side restraining wall surface of the second restraining member and the spacing between the right outer surface of the first restraining member and the right-side restraining wall surface of the second restraining member are equal to each other.