JPS63101343U - - Google Patents

Description

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

第１図ないし第３図は本考案の第１の実施例を
示し、第１図はバンパ用緩衝器の縦断面図、第２
図は破断弁の破断状態を示す第１図の要部拡大図
、第３図はピストン移動速度と抵抗力の関係を示
す特性線図、第４図は第２の実施例を示すバンパ
用緩衝器の縦断面図、第５図は第３の実施例を示
すバンパ用緩衝器の縦断面図、第６図ないし第８
図は前記第３の実施例のそれぞれ異なる変形例を
示す要部断面図、第９図は第４の実施例を示すバ
ンパ用緩衝器の縦断面図、第１０図は抵抗力を３
段階で変化させる場合のピストン移動速度と抵抗
力の関係を示す特性線図である。 １……外筒、２，７５……蓋体、５……内筒、
６……取付部材、９……フリーピストン、１１，
２１，３１……ピストン、１２……画成部材、１
３，２２，３２……オリフイス穴、１４，２３，
３３，４１，５１，６１Ａ，７７……オリフイス
通路、１５，２４，３４……破断弁、１８，７６
……メータリングピン、４２，６２，７８……ボ
ール弁、５２……栓、Ａ……ガス室、Ｂ，Ｃ……
液室。 1 to 3 show a first embodiment of the present invention, FIG. 1 is a vertical sectional view of a bumper shock absorber, and FIG.
The figure is an enlarged view of the main part of Figure 1 showing the rupture state of the rupture valve, Figure 3 is a characteristic diagram showing the relationship between piston movement speed and resistance force, and Figure 4 is a bumper buffer showing the second embodiment. FIG. 5 is a longitudinal sectional view of the bumper shock absorber showing the third embodiment, and FIGS.
The figures are cross-sectional views of essential parts showing different modifications of the third embodiment, FIG. 9 is a longitudinal cross-sectional view of a bumper shock absorber according to the fourth embodiment, and FIG.
FIG. 3 is a characteristic diagram showing the relationship between piston movement speed and resistance force when changing in steps. 1... Outer cylinder, 2,75... Lid body, 5... Inner cylinder,
6...Mounting member, 9...Free piston, 11,
21, 31... Piston, 12... Defining member, 1
3, 22, 32... Orifice hole, 14, 23,
33, 41, 51, 61A, 77... Orifice passage, 15, 24, 34... Breaking valve, 18, 76
...Metering pin, 42,62,78...Ball valve, 52...Bung, A...Gas chamber, B, C...
liquid chamber.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 外筒と、一端側が該外筒内に挿入され、他端側
が該外筒外へと軸方向に突出した内筒と、該内筒
内に摺動可能に挿嵌され、該内筒の突出端側にガ
ス室を画成したフリーピストンと、前記内筒の一
端側に設けられると共に前記外筒内に摺動可能に
挿嵌され、該フリーピストンによつて画成された
内筒の一側と前記外筒内とにそれぞれ液室を画成
するピストンと、該ピストンに穿設されたオリフ
イス穴と、一端側が前記外筒の一端側に固着され
、他端側が該オリフイス穴を介して前記内筒の液
室内へと伸長するメータリングピンと、前記各液
室のうち、外筒内の液室を内筒の液室または外部
に連通するオリフイス通路と、常時は該オリフイ
ス通路を閉塞し、前記外筒内の液室の圧力が所定
圧を越えると破断されて、該オリフイス通路を開
く破断弁とから構成してなるバンパ用緩衝器。 an outer cylinder; an inner cylinder having one end inserted into the outer cylinder and the other end protruding axially outside the outer cylinder; a free piston defining a gas chamber at an end; and an inner cylinder provided at one end of the inner cylinder and slidably inserted into the outer cylinder, and defined by the free piston. a piston defining a liquid chamber on the side and in the outer cylinder, an orifice hole bored in the piston, one end side fixed to one end side of the outer cylinder, and the other end side fixed to the one end side of the outer cylinder through the orifice hole. A metering pin extending into the liquid chamber of the inner cylinder, an orifice passage that communicates the liquid chamber in the outer cylinder with the liquid chamber of the inner cylinder or the outside, and the orifice passage is normally closed. and a rupture valve that is ruptured to open the orifice passage when the pressure in the liquid chamber in the outer cylinder exceeds a predetermined pressure.