JPS5627089A - Oil hydraulic pump - Google Patents
Oil hydraulic pumpInfo
- Publication number
- JPS5627089A JPS5627089A JP11643879A JP11643879A JPS5627089A JP S5627089 A JPS5627089 A JP S5627089A JP 11643879 A JP11643879 A JP 11643879A JP 11643879 A JP11643879 A JP 11643879A JP S5627089 A JPS5627089 A JP S5627089A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- plunger
- pressure
- front chamber
- oil tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Details Of Reciprocating Pumps (AREA)
Abstract
PURPOSE: To permit a compact plunger-type oil hydraulic pump for a cutting tool or the like to produce a high pressure by providing a cylinder divided into two by means of a valve in the oil tank tightly filled with oil, omitting a suction valve, and making the ratio of the high-pressure chamber volume to the dilivery smaller.
CONSTITUTION: The pump is operated by the reciprocation of a plunger 9 in the front chamber A of a cylinder 10 by the drive of a motor 3 through a cam 7 on the eccentric portion of a driving shaft 4. When the plunger 9 is moved backward by the force of a spring 8, a negative pressure is applied in the front chamber A because a valve seat 11 has been closed by a switching valve 14. Consequently, when the plunger 9 opens a suction port 12, operating oil filling an oil tank 1 enclosed is sucked into the front chamber A. When the plunger 9 changes its motion to the discharge stroke, the operating oil in the front chamber A flows into the rear chamber B against the force of a spring 13, and is discharged from a discharge port 15. When the quantity of the oil in the oil tank 1 decreases, the pressure in the tank 1 lowers, and this causes a flexible bag 25 opened in the atmosphere to expand. Consequently, the pressure in the oil tank 1 is kept equal to the atmospheric pressure, and so the pump smoothly operates without lowering its function.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11643879A JPS5627089A (en) | 1979-09-10 | 1979-09-10 | Oil hydraulic pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11643879A JPS5627089A (en) | 1979-09-10 | 1979-09-10 | Oil hydraulic pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5627089A true JPS5627089A (en) | 1981-03-16 |
Family
ID=14687103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11643879A Pending JPS5627089A (en) | 1979-09-10 | 1979-09-10 | Oil hydraulic pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5627089A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61105772U (en) * | 1984-12-17 | 1986-07-04 |
-
1979
- 1979-09-10 JP JP11643879A patent/JPS5627089A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61105772U (en) * | 1984-12-17 | 1986-07-04 | ||
JPH0433421Y2 (en) * | 1984-12-17 | 1992-08-11 |
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