JPS6372341U - - Google Patents

Description

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

第１図は本考案の一実施例に係る油圧緩衝器の
一部縦断正面図、第２図、第３図は第１図のリン
グ部の作動状態を示す拡大断面図、第４図は減衰
力特性を示すグラフ、第５図は他の実施例に係る
リング部の拡大縦断正面図、第６図は従来の油圧
緩衝器の一部縦断正面図、第７図は第６図におけ
る減衰力特性を示すグラフである。 １……シリンダ、２……ピストン、３……ニー
ドル、５……ピストンロツド、６，７……ポート
ー、８，９……リーフバルブ、１０，１１……通
路、１２……室、１３，１８……リング、１４…
…テーパ面、１７……環状溝、２０……テーパ面
、Ａ，Ｂ……油室。 Fig. 1 is a partially longitudinal front view of a hydraulic shock absorber according to an embodiment of the present invention, Figs. 2 and 3 are enlarged sectional views showing the operating state of the ring portion in Fig. 1, and Fig. 4 is a damping Graph showing the force characteristics, FIG. 5 is an enlarged longitudinal sectional front view of a ring part according to another embodiment, FIG. 6 is a partial longitudinal sectional front view of a conventional hydraulic shock absorber, and FIG. 7 is the damping force in FIG. 6. It is a graph showing characteristics. 1... Cylinder, 2... Piston, 3... Needle, 5... Piston rod, 6, 7... Port, 8, 9... Leaf valve, 10, 11... Passage, 12... Chamber, 13, 18 ...Ring, 14...
... Tapered surface, 17 ... Annular groove, 20 ... Tapered surface, A, B ... Oil chamber.

Claims (1)

【実用新案登録請求の範囲】 (1) シリンダ内にピストンを介してピストンロ
ツドが移動自在に挿入され、ピストンはシリンダ
内に上下二つの油室を区画し、ピストンには上下
二つの油室を通じさせるポートを設け、このポー
トの口端にリーフバルブを開閉自在に設け、同じ
くピストンロツドにも上下二つの油室を通じさせ
る通路を設け、この通路の開口面積を外部から上
下動操作されるニードル弁で調整する油圧緩衝器
に於て、ピストンロツドの通路中に弾性なリング
を上下移動自在に配設させ、当該リングの中央に
ニードル弁を上下移動自在に挿入させたことを特
徴とする油圧緩衝器の減衰力調整装置。 (2) リングはその断面が円形であるＯリングか
らなる実用新案登録請求の範囲第１項記載の油圧
緩衝器の減衰力調整装置。 (3) リングはその断面が矩形である角リングか
らなる実用新案登録請求の範囲第１項記載の油圧
緩衝器の減衰力調整装置。 (4) 通路の途中に内周面が上下に拡径されたテ
ーパ面からなる室を設け、この室内に拡径方向に
附勢されているリングを上下移動に配設させた実
用新案登録請求の範囲第１項記載の油圧緩衝器の
減衰力調整装置。 (5) 通路の途中に環状溝を設け、この環状溝の
下部内周面をテーパ面として成形させ、環状溝内
に断面長方形状のリング外周を嵌合させ、当該リ
ングの内周がテーパ面に沿つて下方たわみ得るよ
うにした実用新案登録請求の範囲第１項記載の油
圧緩衝器の減衰力調整装置。[Claims for Utility Model Registration] (1) A piston rod is movably inserted into the cylinder via a piston, the piston defines two upper and lower oil chambers in the cylinder, and the two upper and lower oil chambers communicate with the piston. A port is provided, a leaf valve is provided at the mouth end of this port so that it can be opened and closed, and a passage is also provided in the piston rod that allows the two upper and lower oil chambers to communicate, and the opening area of this passage is adjusted by a needle valve that is operated vertically from the outside. A damping hydraulic shock absorber characterized in that an elastic ring is disposed in the passage of a piston rod so as to be movable up and down, and a needle valve is inserted in the center of the ring so as to be movable up and down. Force adjustment device. (2) The damping force adjusting device for a hydraulic shock absorber according to claim 1, wherein the ring is an O-ring having a circular cross section. (3) The damping force adjusting device for a hydraulic shock absorber according to claim 1, wherein the ring is a square ring having a rectangular cross section. (4) A request for registration of a utility model in which a chamber is provided in the middle of a passage with a tapered surface whose inner circumferential surface is expanded vertically, and a ring that is energized in the direction of expanding the diameter is disposed in this chamber so as to move vertically. A damping force adjustment device for a hydraulic shock absorber according to item 1. (5) An annular groove is provided in the middle of the passage, the lower inner peripheral surface of this annular groove is formed into a tapered surface, and the outer periphery of a ring with a rectangular cross section is fitted into the annular groove, so that the inner periphery of the ring is formed into a tapered surface. A damping force adjusting device for a hydraulic shock absorber according to claim 1, wherein the damping force adjusting device is configured to be able to deflect downward along.