JPS5757946A - Traveling speed control unit to farm tractor - Google Patents

Traveling speed control unit to farm tractor

Info

Publication number
JPS5757946A
JPS5757946A JP12807781A JP12807781A JPS5757946A JP S5757946 A JPS5757946 A JP S5757946A JP 12807781 A JP12807781 A JP 12807781A JP 12807781 A JP12807781 A JP 12807781A JP S5757946 A JPS5757946 A JP S5757946A
Authority
JP
Japan
Prior art keywords
valve
traveling speed
hydraulic pressure
works
speed control
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
JP12807781A
Other languages
Japanese (ja)
Other versions
JPS628656B2 (en
Inventor
Tomoaki Azuma
Hidesuke Nemoto
Junichiro Ichikawa
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.)
KAMIZAKI KOKYU KOKI SEISAKUSHO KK
Kanzaki Kokyukoki Manufacturing Co Ltd
Original Assignee
KAMIZAKI KOKYU KOKI SEISAKUSHO KK
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 KAMIZAKI KOKYU KOKI SEISAKUSHO KK, Kanzaki Kokyukoki Manufacturing Co Ltd filed Critical KAMIZAKI KOKYU KOKI SEISAKUSHO KK
Priority to JP12807781A priority Critical patent/JPS5757946A/en
Publication of JPS5757946A publication Critical patent/JPS5757946A/en
Publication of JPS628656B2 publication Critical patent/JPS628656B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Gear-Shifting Mechanisms (AREA)
  • Control Of Transmission Device (AREA)

Abstract

PURPOSE: To positively insure the cultivation, insemination and fertilization works of a farm tractor by optionally selecting an automatic control valve of a speed control unit to either an off-functional or an auto-functional position.
CONSTITUTION: While an automatic control valve 43 is functioning, a workload increase is detected by a pressure regulator valve 49, that is a load detector, and the valve 43 is shifted toward a low speed position, so that it may control feed/discharge switching of hydraulic oil to plural hydraulic pressure clutches 32, 33 and 34 for forward speed shifting, and the traveling speed is placed under control. Thus various farm works are insured under the constant condition. While the feed/discharge of the hydraulic oil to the hydraulic pressure clutches 32W35 is switched manually, the valve 43 is set to an off-functioning position and on/off switching of the hydraulic pressure clutches 32W35 is controlled by a manually operated switching valve 41. Therefore the traveling speed control of a tractor is manually practicable and an operator can appropriately carry out various farm works such as insemination, fertilization, etc.
COPYRIGHT: (C)1982,JPO&Japio
JP12807781A 1981-08-14 1981-08-14 Traveling speed control unit to farm tractor Granted JPS5757946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12807781A JPS5757946A (en) 1981-08-14 1981-08-14 Traveling speed control unit to farm tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12807781A JPS5757946A (en) 1981-08-14 1981-08-14 Traveling speed control unit to farm tractor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP52078420A Division JPS5821132B2 (en) 1977-06-29 1977-06-29 Traveling speed control device for agricultural tractors, etc.

Publications (2)

Publication Number Publication Date
JPS5757946A true JPS5757946A (en) 1982-04-07
JPS628656B2 JPS628656B2 (en) 1987-02-24

Family

ID=14975854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12807781A Granted JPS5757946A (en) 1981-08-14 1981-08-14 Traveling speed control unit to farm tractor

Country Status (1)

Country Link
JP (1) JPS5757946A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0475918A2 (en) * 1990-09-14 1992-03-18 PRODEA S.r.l. An electronic control system for a hydrokinetic power-shift transmission for a motor vehicle
JPH04107565U (en) * 1991-03-04 1992-09-17 セイレイ工業株式会社 tractor gearbox
JPH07132754A (en) * 1993-11-09 1995-05-23 Yanmar Agricult Equip Co Ltd Load control mechanism for tractor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01117096U (en) * 1988-01-29 1989-08-08

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0475918A2 (en) * 1990-09-14 1992-03-18 PRODEA S.r.l. An electronic control system for a hydrokinetic power-shift transmission for a motor vehicle
EP0475918A3 (en) * 1990-09-14 1993-10-20 Prodea S R L An electronic control system for a hydrokinetic power-shift transmission for a motor vehicle
JPH04107565U (en) * 1991-03-04 1992-09-17 セイレイ工業株式会社 tractor gearbox
JPH07132754A (en) * 1993-11-09 1995-05-23 Yanmar Agricult Equip Co Ltd Load control mechanism for tractor

Also Published As

Publication number Publication date
JPS628656B2 (en) 1987-02-24

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