JPH0326848U

JPH0326848U -

Info

Publication number: JPH0326848U
Application number: JP8816289U
Authority: JP
Priority date: 1989-07-27
Filing date: 1989-07-27
Publication date: 1991-03-19

Description

[Brief explanation of the drawing]

第１図は油圧振動減衰装置の車両の取付け状態
を示す概略図、第２図は油圧振動減衰装置の一部
を縦断面図、同様に第３図も油圧振動減衰装置の
一部を縦断面図を示し、第４図は第２図の−
線に沿つた断面図、第５図は第３図の−線に
沿つた断面図、第６図は本考案装置によるピスト
ン速度と減衰力の変化を示した特性図、第７図は
油圧振動減衰装置に加わる軸力と経過時間との関
係を表す特性図である。１１……ハウジング、１３ｃ……貫通孔、１２
，１３……ピストンロツド、１５……第１の油室
、１６……第２の油室、１４……ピストン、２２
……ロータリバルブ、２４……シヤフト、２５…
…磁石、２８，２９，３０，３１……電磁コイル
、２３……一方向弁。 Fig. 1 is a schematic diagram showing how the hydraulic vibration damping device is installed on a vehicle, Fig. 2 is a longitudinal sectional view of a part of the hydraulic vibration damping device, and similarly Fig. 3 is a longitudinal sectional view of a part of the hydraulic vibration damping device. Fig. 4 shows the - of Fig. 2.
5 is a sectional view taken along the - line in FIG. 3, FIG. 6 is a characteristic diagram showing changes in piston speed and damping force by the device of the present invention, and FIG. 7 is a diagram showing hydraulic vibration. It is a characteristic diagram showing the relationship between the axial force applied to the damping device and elapsed time. 11...Housing, 13c...Through hole, 12
, 13... Piston rod, 15... First oil chamber, 16... Second oil chamber, 14... Piston, 22
...Rotary valve, 24...Shaft, 25...
... Magnet, 28, 29, 30, 31 ... Electromagnetic coil, 23 ... One-way valve.

Claims

[Scope of utility model registration request]

a cylindrical housing; a cylindrical piston rod disposed axially displaceably within the housing and having at least one radially extending through hole; and a piston that defines a second oil chamber and is rotatably fitted on the inner periphery of the piston rod and forms a plurality of orifices in the radial direction, the orifice and the through hole depending on the rotational position. a rotary valve that controls communication between the first and second oil chambers via the piston rod; a shaft rotatably housed within the piston rod and engaged to rotate integrally with the rotary valve; A hydraulic vibration damping device comprising a magnet fixed on the outer periphery of the piston rod, and a plurality of electromagnetic coils fixed on the inner periphery of the piston rod so as to surround the magnet. A hydraulic vibration damping device characterized in that a one-way valve that allows fluid to flow into an oil chamber is provided in a communication hole of the piston rod at a position corresponding to an orifice of the rotary valve.