JPS5639964A - Steering hydraulic circuit for construction equipment - Google Patents
Steering hydraulic circuit for construction equipmentInfo
- Publication number
- JPS5639964A JPS5639964A JP11409279A JP11409279A JPS5639964A JP S5639964 A JPS5639964 A JP S5639964A JP 11409279 A JP11409279 A JP 11409279A JP 11409279 A JP11409279 A JP 11409279A JP S5639964 A JPS5639964 A JP S5639964A
- Authority
- JP
- Japan
- Prior art keywords
- brake
- vehicle
- oil pressure
- move
- clutch
- 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
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
PURPOSE: To achieve easy steering with a simple steering mechanism by placing one spool of a steering valve under the control of a single control lever to provide the intermittent operations of a left or right clutch and a braking action for each of left and right brake.
CONSTITUTION: To move a vehicle in the counterclockwise direction, a control lever 6 is handled to move a spool of a steering valve 5 left to communicate ports 51, 52 with each other. An oil pressure from a pump 2 is allowed to be transmitted via a duct 12 to a left clutch 10 and the bottom space inside a left brake cylinder 13a so that the left clutch 10 is disengaged. On the other hand, left and right brakes 13, 15 are released because an oil pressure from a transmission pump 3 is carried into a space on the rod side inside each of left and right brake cylinder 13a, 15a. A piston 13b yields to a combination of the oil pressure from the pump 2 and a force of a compression spring 13c to move left so that the left brake 13 acts to brake the vehicle to turn it counterclockwise. A clockwise turning of the vehicle can be attained by handling the lever 6 in the opposite direction.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11409279A JPS5639964A (en) | 1979-09-07 | 1979-09-07 | Steering hydraulic circuit for construction equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11409279A JPS5639964A (en) | 1979-09-07 | 1979-09-07 | Steering hydraulic circuit for construction equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5639964A true JPS5639964A (en) | 1981-04-15 |
Family
ID=14628894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11409279A Pending JPS5639964A (en) | 1979-09-07 | 1979-09-07 | Steering hydraulic circuit for construction equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5639964A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4949823A (en) * | 1989-06-29 | 1990-08-21 | Caterpillar Inc. | Control system and logic system for independent control of vehicle brakes |
-
1979
- 1979-09-07 JP JP11409279A patent/JPS5639964A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4949823A (en) * | 1989-06-29 | 1990-08-21 | Caterpillar Inc. | Control system and logic system for independent control of vehicle brakes |
WO1991000208A1 (en) * | 1989-06-29 | 1991-01-10 | Caterpillar Inc. | System for independent control of vehicle brakes |
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