Sumitomo Electric Industries, Limited

Kawasaki Jukogyo Kabushiki Kaisha

Takayuki Sawa

Hideki Kitada

Yasuhiko Ura

Yoshi Sato

Takehiro Nishimura

Keiichiro Kamura

Hirokazu Haraguchi

Yukitaka Taga

Junichi Shirakawa

Kazuo Isomura

Koichi Murata

Makoto Tamaki

Toshihisa Adachi

Jun Yoshida

An air spring includes an outer cylindrical member, an inner cylindrical member combined with the outer cylindrical member, a diaphragm coupling the outer cylindrical member and the inner cylindrical member to each other, the diaphragm providing an internal space between the outer cylindrical member and the inner cylindrical member, a first element located on a side of the internal space in at least one of the outer cylindrical member and the inner cylindrical member and defining a part of the internal space, a second element adjacent to the first element, the second element defining a part of the internal space, and a cover layer covering a boundary portion between the first element and the second element.

Air spring and bogie

An air spring includes an outer cylindrical member, an inner cylindrical member, a diaphragm, the diaphragm providing an internal space between the outer cylindrical member and the inner cylindrical member, a stopper assembly arranged in the internal space as being pivotable over the inner cylindrical member, a handle for pivoting the stopper assembly over the inner cylindrical member, a guide member attached to the handle as rising from the handle, a positioning member attached by insertion in a guide hole in the guide member for positioning of the handle, a positioning hole provided in the inner cylindrical member which can receive the positioning member, and a holding mechanism in the inner cylindrical member. A position of the stopper assembly with respect to the inner cylindrical member is determined by inserting the positioning member in the positioning hole.

An air spring according to the present disclosure includes: an inner cylindrical member; an outer cylindrical member provided on the inner cylindrical member; a diaphragm coupled with the outer cylindrical member and the inner cylindrical member; and a stopper provided rotatably with respect to a circumferential direction of the inner cylindrical member. The stopper has a raised portion raised towards the outer cylindrical member and moving on the inner cylindrical member in the circumferential direction. The outer cylindrical member has a plurality of raised portions raised toward the inner cylindrical member. The plurality of raised portions of the outer cylindrical member are different in height. At least one of the outer cylindrical member's raised portion and the stopper's raised portion is restorable against circumferential deformation.

An air spring includes an outer cylindrical member, an inner cylindrical member combined with the outer cylindrical member, a diaphragm coupling the outer cylindrical member and the inner cylindrical member to each other, the diaphragm providing an internal space between the outer cylindrical member and the inner cylindrical member, a stopper assembly arranged in the internal space as being pivotable over the inner cylindrical member, the stopper assembly allowing suppression of movement of the outer cylindrical member toward the inner cylindrical member more than necessary, a pivoting mechanism pivoting the stopper assembly over the inner cylindrical member, and a space portion provided between the stopper assembly and the inner cylindrical member, the space portion allowing lowering in resistance in pivot of the stopper assembly.

An air spring includes: an outer cylindrical member; an inner cylindrical member; a diaphragm which couples the outer and inner cylindrical members and forms an internal space; a stopper assembly disposed in the internal space; and a pivoting mechanism which causes this stopper assembly to pivot on the inner cylindrical member. The stopper assembly has a stopper portion protruding towards the outer cylindrical member, and the outer cylindrical member has as a set four or more protrusion portions provided at a position to face the stopper portion and protruding toward the inner cylindrical member. Each of the protrusion portions belonging to the set is disposed successively and also different in height. Each of the protrusion portions belonging to the set is arranged without having a protrusion portion belonging to the set smallest in height adjacent to a protrusion portion belonging to the set largest in height.

An air spring includes a top plate, a bottom plate disposed with a distance in a main load direction from the top plate, and a diaphragm made of elastically deformable rubber and connected to the top plate and the bottom plate to form a closed space therebetween. A modulus of elasticity of a material constituting a connection section which is disposed in the top plate and the bottom plate and connected to the diaphragm is greater than a modulus of elasticity of the rubber constituting the diaphragm and smaller than a modulus of elasticity of aluminum.

Air spring

A railcar bogie includes: a bolster located under a carbody of a railcar; an air spring including an air spring main body in which air is stored, the air spring being arranged between the carbody and the bolster; a coil spring arranged between the air spring and the bolster and configured to separate the air spring from the bolster by restoring force thereof in a state where a height of the carbody is maintained at a certain height regardless of the air spring; and a limiting member configured to limit the amount of displacement of the coil spring to limit the amount of separation between the air spring and the bolster.

Railcar bogie

The invention offers an air spring for obtaining a vehicle that renders good comfortableness even at the time of the curved-track running. The air spring for a vehicle has an upper board, a lower board, a diaphragm, and a stopper rubber placed between the lower board and a lower plate. The air spring is provided with a mechanism for restraining the displacement of the stopper rubber, the mechanism having 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. The shape of restraining wall surfaces is formed such that in the relative positional relationship between the first and second restraining members, when the first or second restraining member displaces itself such that it delineates an arc by placing the center at the railway truck axis of the railway truck of a vehicle, the spacings between the first and second restraining members at the left side and right side are equal to each other or decrease as the amount of displacement along the arc increases.

Growing community of inventors

Osaka, Japan

Takayuki Sawa