JPS61190047U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例による緩衝器を鉄道車
両の左右動緩衝器として適用した状態を示す説明
図、第２図は第１図中に示す緩衝器の縦断面図、
第３図は第２図中に示す減衰力調整用弁機構の縦
断面図、第４図は空気圧と減衰力との関係を示す
線図、第５図は減衰力特性線図である。 ８…油圧緩衝器、１３Ａ…外筒、１３Ｂ…内筒
、１７…ピストン、１８…ピストンロツド、２３
，２４，２５…油通路、２６…パイプ、２９…減
衰力調整用弁機構、３０…内側ケーシング、３１
…外側ケーシング、３２…蓋体、３４…弁部材、
３４Ａ…受圧部、３４Ｃ…絞り部、３５，４２…
ダイアフラム、Ａ，Ｂ…油室、Ｃ…リザーバ室、
Ｄ…圧力室、Ｐ…空気圧。 FIG. 1 is an explanatory diagram showing a state in which a shock absorber according to an embodiment of the present invention is applied as a lateral motion shock absorber for a railway vehicle, FIG. 2 is a longitudinal sectional view of the shock absorber shown in FIG. 1,
FIG. 3 is a longitudinal sectional view of the damping force adjusting valve mechanism shown in FIG. 2, FIG. 4 is a diagram showing the relationship between air pressure and damping force, and FIG. 5 is a damping force characteristic diagram. 8...Hydraulic shock absorber, 13A...Outer cylinder, 13B...Inner cylinder, 17...Piston, 18...Piston rod, 23
, 24, 25... Oil passage, 26... Pipe, 29... Valve mechanism for damping force adjustment, 30... Inner casing, 31
...outer casing, 32...lid body, 34...valve member,
34A...Pressure receiving part, 34C...Constriction part, 35, 42...
Diaphragm, A, B...oil chamber, C...reservoir chamber,
D...Pressure chamber, P...Pneumatic pressure.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 外筒と、該外筒内に配設された内筒と、該内筒
内に摺動可能に挿嵌され該内筒内を２つの油室に
画成するピストンと、一端側が該ピストンに取付
けられ、他端側が前記内筒および外筒から外部に
突出したピストンロツドと、前記２つの油室を外
筒内を介して連通する油路と、該油路の途中に設
けられた減衰力調整用弁機構とからなる減衰力調
整式油圧緩衝器において、前記減衰力調整用弁機
構は軸方向に変位可能に前記油路の途中に設けら
れた弁部材と、該弁部材に設けられ、前記油路内
の圧力を受圧して該弁部材を軸方向一側に変位さ
せる受圧部と、該受圧部から離隔して前記弁部材
に設けられ、該弁部材の軸方向変位に応じて前記
油路を開閉する減衰力発生用の絞り部と、前記弁
部材の基端側に固着され、外部から気体圧が供給
されることにより該弁部材を軸方向他側に付勢す
る可動隔壁とを備え、前記気体圧を調整すること
によつて発生減衰力を可変ならしめるように構成
したことを特徴とする減衰力調整式油圧緩衝器。 an outer cylinder, an inner cylinder disposed within the outer cylinder, a piston that is slidably inserted into the inner cylinder and defines the inside of the inner cylinder into two oil chambers, and one end of which is connected to the piston. a piston rod that is attached and whose other end protrudes outward from the inner and outer cylinders, an oil passage that communicates the two oil chambers through the outer cylinder, and a damping force adjustment provided in the middle of the oil passage. In the damping force adjustable hydraulic shock absorber, the damping force adjusting valve mechanism is provided with a valve member provided midway in the oil passage so as to be displaceable in the axial direction; a pressure receiving part that receives pressure in an oil passage and displaces the valve member to one side in the axial direction; A throttle part for generating a damping force that opens and closes the passage, and a movable partition that is fixed to the proximal end side of the valve member and biases the valve member in the other axial direction when gas pressure is supplied from the outside. A damping force adjustable hydraulic shock absorber, characterized in that the damping force adjustable hydraulic shock absorber is configured to make the generated damping force variable by adjusting the gas pressure.