JPS56112325A - Travel drive unit for agricultural tractor - Google Patents
Travel drive unit for agricultural tractorInfo
- Publication number
- JPS56112325A JPS56112325A JP1170480A JP1170480A JPS56112325A JP S56112325 A JPS56112325 A JP S56112325A JP 1170480 A JP1170480 A JP 1170480A JP 1170480 A JP1170480 A JP 1170480A JP S56112325 A JPS56112325 A JP S56112325A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- travel
- creep
- change
- advance
- 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.)
- Granted
Links
Landscapes
- Arrangement Of Transmissions (AREA)
Abstract
PURPOSE: To unforcedly obtain creep travel with a compact device by using an existing hydraulic clutch type speed changer and slip-operating one hydraulic clutch in this speed changer.
CONSTITUTION: Cars travel normally at a speed which is determined by the gear ratio of the respective speed change gear rows 14, 15; 16, 17; 18W20 by controlling a pressure regulating valve 46 and optionally switching a change-over valve 40 into the advance first speed position F1, advance second speed position F2, and retreat first speed position R. Then when they travel at ultra-low speed, i.e. when creep travel is made, the pressure regulating valve 46 is controlled by a controller 58. Besides, the change-over valve 40 is set to the creep position C and the wear plate of an F1 clutch 21 and its opposed plate are mutually slipped. This obtains a larger deceleration ratio than that determined by the gear ratio between the gears 14 and 15 and achieves creep travel.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1170480A JPS56112325A (en) | 1980-02-02 | 1980-02-02 | Travel drive unit for agricultural tractor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1170480A JPS56112325A (en) | 1980-02-02 | 1980-02-02 | Travel drive unit for agricultural tractor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56112325A true JPS56112325A (en) | 1981-09-04 |
JPS6213217B2 JPS6213217B2 (en) | 1987-03-25 |
Family
ID=11785425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1170480A Granted JPS56112325A (en) | 1980-02-02 | 1980-02-02 | Travel drive unit for agricultural tractor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56112325A (en) |
-
1980
- 1980-02-02 JP JP1170480A patent/JPS56112325A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6213217B2 (en) | 1987-03-25 |
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