JPS566832A - Hydraulic circuit for hydraulic shovel - Google Patents
Hydraulic circuit for hydraulic shovelInfo
- Publication number
- JPS566832A JPS566832A JP8134479A JP8134479A JPS566832A JP S566832 A JPS566832 A JP S566832A JP 8134479 A JP8134479 A JP 8134479A JP 8134479 A JP8134479 A JP 8134479A JP S566832 A JPS566832 A JP S566832A
- Authority
- JP
- Japan
- Prior art keywords
- change
- over valve
- over
- hydraulic
- shovel
- 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
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To provide a positive speed-up each of the actuators as well as to improve the workability of the shovel in a hydraulic circuit for a hydraulic shovel having three units of pumps.
CONSTITUTION: Hydraulic circuit is provided with a group of change-over valves as a change-over valve 9 for a leftward movement, a change-over valve 10 for increasing a speed of the boom, a change-over valve 11 for an arm, a change-over valve 12 for a boom turning operation, another group of change-over valve 18 having a change-over valve 18a for additional turning operation and a change-over valve 18b for additional arm, pumps 2 and 3, swivel motor 40, leftward movement motor 80 and rightward movement motor 90 etc. Throttle valves E and F are arranged for said groups of change-over valves and the additional change-over valve is controlled for its change-over operation by a pressure difference between the points before and after the throttle valves E and F.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8134479A JPS566832A (en) | 1979-06-29 | 1979-06-29 | Hydraulic circuit for hydraulic shovel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8134479A JPS566832A (en) | 1979-06-29 | 1979-06-29 | Hydraulic circuit for hydraulic shovel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS566832A true JPS566832A (en) | 1981-01-24 |
Family
ID=13743743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8134479A Pending JPS566832A (en) | 1979-06-29 | 1979-06-29 | Hydraulic circuit for hydraulic shovel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS566832A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6189123A (en) * | 1984-10-09 | 1986-05-07 | Handoothe- Kogyo Kk | Automatic speed change type hydraulic drive unit for vehicle travel unit |
JPH0452603U (en) * | 1990-09-13 | 1992-05-06 | ||
JPH0452604U (en) * | 1990-09-13 | 1992-05-06 | ||
JPH0454303U (en) * | 1990-09-13 | 1992-05-11 |
-
1979
- 1979-06-29 JP JP8134479A patent/JPS566832A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6189123A (en) * | 1984-10-09 | 1986-05-07 | Handoothe- Kogyo Kk | Automatic speed change type hydraulic drive unit for vehicle travel unit |
JPH0452603U (en) * | 1990-09-13 | 1992-05-06 | ||
JPH0452604U (en) * | 1990-09-13 | 1992-05-06 | ||
JPH0454303U (en) * | 1990-09-13 | 1992-05-11 |
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