JPS644531A - Hydraulic four-wheel-drive device - Google Patents
Hydraulic four-wheel-drive deviceInfo
- Publication number
- JPS644531A JPS644531A JP16064887A JP16064887A JPS644531A JP S644531 A JPS644531 A JP S644531A JP 16064887 A JP16064887 A JP 16064887A JP 16064887 A JP16064887 A JP 16064887A JP S644531 A JPS644531 A JP S644531A
- Authority
- JP
- Japan
- Prior art keywords
- drive motor
- speed
- variable displacement
- displacement type
- pump
- 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 And Driving Of Transmission Devices (AREA)
Abstract
PURPOSE:To make it possible to simply and surely eliminate the difference in rotational speed between front and rear wheels by associating a variable displacement type front wheels drive motor to which hydraulic oil branching from oil discharged from a variable displacement pump is fed, with a steering unit so as to increase the speed of the front wheels in accordance with the radius of turn. CONSTITUTION:A charge pump 4 is incorporated to a viable displacement pump P which is mounted to an engine E. Pressure oil discharged from the pump P is bifurcated and fed into a variable displacement type front wheel drive motor MF and a fixed displacement type rear wheel drive motor MR through constant ratio flow dividing valves 5, 6, respectively. In this arrangement, the variable displacement type front wheel drive motor MF is arranged so as to make the rotational speed of a motor shaft 7 variable in association with the rotational speed of a swash plate 2 as a speed changing device, and the swash plate 2 is associated with a member corresponding to the turning angle of a steering wheel 1. Further the angle of the swash plate 2 is changed correspond ing to the turning angle of the steering wheel 1 so as to increase the speed of the left and right front wheels 11L, 11R.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16064887A JPH0649424B2 (en) | 1987-06-26 | 1987-06-26 | Hydraulic four-wheel drive |
US07/211,912 US4886142A (en) | 1987-06-26 | 1988-06-27 | Hydraulic four-wheel drive system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16064887A JPH0649424B2 (en) | 1987-06-26 | 1987-06-26 | Hydraulic four-wheel drive |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS644531A true JPS644531A (en) | 1989-01-09 |
JPH0649424B2 JPH0649424B2 (en) | 1994-06-29 |
Family
ID=15719476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16064887A Expired - Lifetime JPH0649424B2 (en) | 1987-06-26 | 1987-06-26 | Hydraulic four-wheel drive |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0649424B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0459435A (en) * | 1990-06-29 | 1992-02-26 | Kubota Corp | Turning operation structure of four wheel drive vehicle |
US6189641B1 (en) * | 1998-04-15 | 2001-02-20 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Four-wheel hydraulic drive system for working vehicle |
JP2006258119A (en) * | 2005-03-15 | 2006-09-28 | Hitachi Constr Mach Co Ltd | Hst running system for work machine |
-
1987
- 1987-06-26 JP JP16064887A patent/JPH0649424B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0459435A (en) * | 1990-06-29 | 1992-02-26 | Kubota Corp | Turning operation structure of four wheel drive vehicle |
US6189641B1 (en) * | 1998-04-15 | 2001-02-20 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Four-wheel hydraulic drive system for working vehicle |
JP2006258119A (en) * | 2005-03-15 | 2006-09-28 | Hitachi Constr Mach Co Ltd | Hst running system for work machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0649424B2 (en) | 1994-06-29 |
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