JPS59100799U

JPS59100799U - hydraulic jack

Info

Publication number: JPS59100799U
Application number: JP19835182U
Authority: JP
Inventors: 大河原　吉克
Original assignee: コレツク株式会社
Priority date: 1982-12-24
Filing date: 1982-12-24
Publication date: 1984-07-07
Also published as: JPS6348638Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面はこの考案の実施例を示し、第１図は部分切欠き側
面図、第２図は背面図、第３図は第１図■−■線の拡大
断面図、第４図は調整弁の展開図である。The drawings show an embodiment of this invention; Fig. 1 is a partially cutaway side view, Fig. 2 is a rear view, Fig. 3 is an enlarged cross-sectional view taken along the line ■-■ in Fig. 1, and Fig. 4 is a view of the regulating valve. This is a developed diagram.

Claims

[Scope of utility model registration request]

Oil tank 2, ram cylinder 3 and pump cylinder 24
The first oil passage 48 provided between the first oil passage 4 and the first oil passage 4
8 and the oil tank 2; a third oil passage 50 that communicates the first oil passage 48 with the oil chamber of the ram cylinder 3; Oil passage 49 and third oil passage 5
A fourth oil passage 51 that communicates the portion between 0 and 0 with the oil chamber of the pump cylinder 24, and a small diameter provided in a portion of the first oil passage 48 that is slightly closer to the oil tank 2 than the fourth oil passage 51. Ball valve body 56
a suction neutral dual-purpose valve 57, a discharge/lower dual-purpose valve 60 having a large-diameter valve body 59 provided in a portion of the first oil passage 48 slightly closer to the ram cylinder 3 than the fourth oil passage 51; It is installed in the oil chamber of the cylinder 3 and the free end 80 is the third
A regulating valve 7 made of a leaf spring is arranged to face the oil passage 50 of the ram cylinder 3 and to be slightly separated from the oil chamber wall of the ram cylinder 3.
6, and a suction neutral dual-purpose valve 57 in the first oil passage 48.
It is equipped with a valve switching rod 63 movably inserted from the side, and the valve switching rod 63 is in the raised position where it does not contact the small diameter ball valve body 56, and in the neutral dual-purpose valve 57 by pushing only the small diameter ball valve body 56.
Neutral position where only the valve is forcibly opened, and the small diameter ball valve body 56
At the same time, a hydraulic jack is configured to push the large-diameter valve body 59 through this to forcefully switch the suction neutral valve 57 and the discharge lowering valve 60 to a lower position.