JPH0167301U

JPH0167301U -

Info

Publication number: JPH0167301U
Application number: JP1987162836U
Authority: JP
Priority date: 1987-10-23
Filing date: 1987-10-23
Publication date: 1989-04-28
Also published as: JPH0417841Y2

Description

[Brief explanation of the drawing]

第１図から第３図は本考案の実施例を示し、第
１図は要部の縦断面図、第２図は全体系統図、第
３図は油圧給排装置の全体を示す概略図で、第４
図と第５図は従来例を示し、第４図は第２図相当
図、第５図は第１図相当図である。３……単動形油圧シリンダ、３ａ……作動室、
５……油タンク、６……ブースタポンプ、７……
油圧給排弁、３０……ポンプ本体、３１……ポン
プ室、３７……出口、４０……弁室、４１……給
圧弁座、４２……排圧弁座、４３……給圧弁体、
４４……排圧弁体、６５……排圧操作具、Ａ……
作業ポート、Ｐ……給圧口、Ｒ……排圧口、Ｓ…
…吐出路。 Figures 1 to 3 show embodiments of the present invention, with Figure 1 being a vertical sectional view of the main parts, Figure 2 being a general system diagram, and Figure 3 being a schematic diagram showing the entire hydraulic supply/discharge device. , 4th
5 and 5 show a conventional example, FIG. 4 is a diagram equivalent to FIG. 2, and FIG. 5 is a diagram equivalent to FIG. 1. 3... Single-acting hydraulic cylinder, 3a... Working chamber,
5...Oil tank, 6...Booster pump, 7...
Hydraulic supply and discharge valve, 30... Pump body, 31... Pump chamber, 37... Outlet, 40... Valve chamber, 41... Pressure supply valve seat, 42... Discharge pressure valve seat, 43... Pressure supply valve body,
44...Exhaust pressure valve body, 65...Exhaust pressure operating tool, A...
Work port, P...Pressure port, R...Exhaust pressure port, S...
...Discharge path.

Claims

[Scope of Claim for Utility Model Registration] The outlet 37 of the pump chamber 31 of the booster pump 6 communicates with the pressure supply port P of the valve chamber 40 of the seat valve type hydraulic supply/discharge valve 7, and the pressure supply port P is provided on one end surface of the valve chamber 40. P and supply pressure valve seat 41, exhaust pressure port R and exhaust pressure valve seat 42 on the other end surface,
A working port A is formed in the intermediate portion, and within the valve chamber 40,
The supply pressure valve element 43 is brought into contact with the supply pressure valve seat 41 and the exhaust pressure valve element 44 is brought into contact with the exhaust pressure valve seat 42 so that they can be opened and closed freely, and the exhaust pressure operating tool 65 can be operated to open the valve from the exhaust pressure port R side on the exhaust pressure valve element 44. In the pressure supply state in which the booster pump 6 discharges, the oil pressurized in the pump chamber 31 flows into the pressure supply valve body 43.
is pressed open and press-fitted into the valve chamber 40, and the working port A
Working chamber 3a of single-acting hydraulic cylinder 3 connected to
The hydraulic cylinder 3 is driven hydraulically, the exhaust pressure valve element 44 is opened by the exhaust pressure operating tool 65, and the pressure supply valve element 43 is opened via the exhaust pressure valve element 44.
In the exhaust pressure state where the valve is closed, the pressure oil in the working chamber 3a of the hydraulic cylinder 3 is released from the exhaust port R through the work port A and the valve chamber 40 to the oil tank 5, and the hydraulic cylinder 3 is restored. In the seat valve type hydraulic supply/discharge device for a single-acting hydraulic cylinder configured to operate, the valve chamber 40 of the hydraulic supply/discharge valve 7 is formed at a position close to the pump chamber 31 within the pump body 30 of the booster pump 6, The pressure supply port P of the valve chamber 40 is directly communicated with the outlet 37 of the pump chamber 31 through a short discharge path S.
A seat valve type hydraulic supply/discharge device for a single-acting hydraulic cylinder, characterized in that the pressure of 1 is applied directly to the pressure supply valve body 43 from this short discharge path S.