JPS644533A - Hydraulic four-wheel-drive device - Google Patents

Hydraulic four-wheel-drive device

Info

Publication number
JPS644533A
JPS644533A JP16065087A JP16065087A JPS644533A JP S644533 A JPS644533 A JP S644533A JP 16065087 A JP16065087 A JP 16065087A JP 16065087 A JP16065087 A JP 16065087A JP S644533 A JPS644533 A JP S644533A
Authority
JP
Japan
Prior art keywords
variable displacement
wheel drive
drive motor
selector valve
displacement type
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
Application number
JP16065087A
Other languages
Japanese (ja)
Other versions
JPH0649425B2 (en
Inventor
Kojiro Yamaoka
Tomoaki Azuma
Kazuhiko Yano
Ryota Ohashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kanzaki Kokyukoki Manufacturing Co Ltd
Original Assignee
Kanzaki Kokyukoki Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kanzaki Kokyukoki Manufacturing Co Ltd filed Critical Kanzaki Kokyukoki Manufacturing Co Ltd
Priority to JP16065087A priority Critical patent/JPH0649425B2/en
Priority to US07/211,912 priority patent/US4886142A/en
Publication of JPS644533A publication Critical patent/JPS644533A/en
Publication of JPH0649425B2 publication Critical patent/JPH0649425B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To make it possible to facilitate the change-over between the four wheel drive mode and the two wheel drive mode of a vehicle by disposing a selector valve having a open-center position, between a variable displacement pump and a variable displacement type front wheel drive motor so that the selector valve is changed over to turn on and off the drive of front wheels. CONSTITUTION:Hydraulic oil discharged from a variable displacement pump P is bifurcated and fed into a variable displacement type font 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, which is associated with a steering wheel 1. In the above-mentioned arrangement, selector valve V having an open-center position is disposed between the variable displacement pump P and the variable displacement type front wheel drive motor MF. Further, the position of the selector valve V is changed over to the open-center position, as required, so as to cut off the supply of pressure oil from the pump P to the front wheel motor MF.
JP16065087A 1987-06-26 1987-06-26 Hydraulic four-wheel drive Expired - Lifetime JPH0649425B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP16065087A JPH0649425B2 (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
JP16065087A JPH0649425B2 (en) 1987-06-26 1987-06-26 Hydraulic four-wheel drive

Publications (2)

Publication Number Publication Date
JPS644533A true JPS644533A (en) 1989-01-09
JPH0649425B2 JPH0649425B2 (en) 1994-06-29

Family

ID=15719521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16065087A Expired - Lifetime JPH0649425B2 (en) 1987-06-26 1987-06-26 Hydraulic four-wheel drive

Country Status (1)

Country Link
JP (1) JPH0649425B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189641B1 (en) * 1998-04-15 2001-02-20 Kanzaki Kokyukoki Mfg. Co., Ltd. Four-wheel hydraulic drive system for working vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189641B1 (en) * 1998-04-15 2001-02-20 Kanzaki Kokyukoki Mfg. Co., Ltd. Four-wheel hydraulic drive system for working vehicle

Also Published As

Publication number Publication date
JPH0649425B2 (en) 1994-06-29

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