JPS649892U

JPS649892U -

Info

Publication number: JPS649892U
Application number: JP10729587U
Authority: JP
Priority date: 1987-02-12
Filing date: 1987-07-13
Publication date: 1989-01-19
Anticipated expiration: 2002-07-13
Also published as: JPH0520908Y2

Description

[Brief explanation of the drawing]

第１図は本考案の最適な一実施例に係るフロン
トフオークを一部破断して示す断面図、第２図乃
至第５図はそれぞれ本考案の要部を示す拡大断面
図、第６図は従来のフロントフオークを第１と同
様に示す断面図である。（符号の説明）、１……アウターチユーブ、３
……インナーチユーブ、４……ダンパーシリンダ
、５……ピストン部、６……ピストンロツド、７
……センターロツド、１１……デイスクを兼ねる
開閉部材、１１ａ……チエツクバルブを兼ねる開
閉部材、１２，１２ａ……減衰バルブ、１５……
通孔、１６ａ，１６ｂ……油通路、１７，１７ａ
乃至１７ｄ……連通孔、２２……上部油室、２３
……下部油室、３１，３１ａ，３１ｂ……通路。 FIG. 1 is a partially cutaway sectional view of a front fork according to an optimal embodiment of the present invention, FIGS. 2 to 5 are enlarged sectional views showing the main parts of the present invention, and FIG. It is a sectional view showing a conventional front fork similarly to the first one. (Explanation of symbols), 1... Outer tube, 3
... Inner tube, 4 ... Damper cylinder, 5 ... Piston section, 6 ... Piston rod, 7
...Center rod, 11... Opening/closing member that also serves as a disk, 11a... Opening/closing member that also serves as a check valve, 12, 12a... Damping valve, 15...
Through hole, 16a, 16b...Oil passage, 17, 17a
to 17d...Communication hole, 22...Upper oil chamber, 23
...Lower oil chamber, 31, 31a, 31b...passage.

Claims

[Claims for Utility Model Registration] (1) An inner tube is slidably inserted into an outer tube, a piston is slidably housed in a damper cylinder that stands up from the inner bottom of the outer tube, and the above-mentioned In a front fork, an upper oil chamber is defined in a damper cylinder by a piston part, an upper end of the piston rod is connected to the inside of the upper end of the outer tube, and a lower end of the piston rod is connected to the piston part. An oil passage is formed inside, and the upper end of the oil passage communicates with an air chamber outside the piston rod, and the lower end of the oil passage communicates with an upper oil chamber inside the piston. A front fork, characterized in that an opening/closing member is housed in the piston portion to enable communication and isolation of the oil passage when the piston portion moves up and down within the damper cylinder. (2) A request for registration of a utility model in which a center rod constituting a part of the piston rod is connected to the piston rod, a communication hole is provided in the center rod, and an opening/closing member is installed on the outer periphery of the center rod so as to be movable up and down. The front fork described in item 1. (3) Utility model registration claim 1, in which the opening/closing member has a through hole facing the damping valve, and the opening/closing member is a disk that presses the damping valve.
Front fork as described in section. (4) The front fork according to claim 1, wherein the opening/closing member is a check valve that opens when compressed. (5) Utility model registration claim 1, in which the air chamber is formed in a reservoir chamber formed between the outside of the piston rod and the inside of the inner tube.
Front fork as described in section.