GB1101775A - Improvements in or relating to tractor hydraulic control systems - Google Patents

Improvements in or relating to tractor hydraulic control systems

Info

Publication number
GB1101775A
GB1101775A GB346665A GB346665A GB1101775A GB 1101775 A GB1101775 A GB 1101775A GB 346665 A GB346665 A GB 346665A GB 346665 A GB346665 A GB 346665A GB 1101775 A GB1101775 A GB 1101775A
Authority
GB
United Kingdom
Prior art keywords
cam
pressure
roller
control
valve
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.)
Expired
Application number
GB346665A
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.)
Massey Ferguson Inc
Original Assignee
Massey Ferguson Inc
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
Priority claimed from US341548A external-priority patent/US3275084A/en
Application filed by Massey Ferguson Inc filed Critical Massey Ferguson Inc
Publication of GB1101775A publication Critical patent/GB1101775A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A01B63/111—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Lifting Devices For Agricultural Implements (AREA)

Abstract

1,101,775. Tractor power lift mechanisms. MASSEY-FERGUSON Inc. 26 Jan., 1965 [31 Jan., 1964], No. 3466/65. Addition to 1,046,621. Heading A1P. A tractor power lift mechanism having draft control and position control is characterized by means for controlling the pressure in the ram 21a including a valve 261 hydraulically connected to the ram and controlling admission of pressure fluid to a device 262 incorporating a flexible diaphragm 264 movements of which operate, through a rod 267, the main control valve 115. The pressure at which the valve 261 opens to feed fluid to the diaphragm 264 is controlled by adjustment of a spring 288 biasing a valve element 284 by means of the manual lever 225 operating cam 310 arranged to move lever 305. The main control valve 115 is operated by the rod 267 through levers 146 and 140 movements of which are damped by a dashpot device 165. Position control is also operated by manual lever 225 and in the position range shown, the cam 310 sets the pressure control valve 261 at its maximum setting. For position control a roller 233 eccentrically mounted on the cam 310 moves a cam element 231 downwardly whereupon co-operation between the cam element 231 and a roller 229 fixed to rocker plates 228 pulls the cam element 231 rearwardly to pivot lever 146 and thence move the control valve 115. Follow-up is provided by a roller 227 on the rocker plates 228 engaging a cam 226 on the rock-shaft 20a, the rocker-plates being spring-biased to keep the roller in contact with the cam. Draft load is initially set by manual lever 220 operating an eccentric roller 223 cooperating with a cam element 215 and is then controlled by movements of the upper link 14a acting against a spring 200 to operate, through rods 203, 204, rocker plates 205. A roller 211 carried by the rocker plates 205 engages the cam element 215 which operates, via the links 146 and 140, the main control valve 115. A lost motion connection 216 between the cam 215 and link 146 enables the pressure and position controls to be operated independently of the draft control. The pressure control, however, can operate when draft control is operating to limit the maximum pressure occuring in the ram 21a. By setting the pressure control to limit the pressure in the ram to a value less than that required by lifting an attached implement weight transfer from the implement to the tractor can be obtained.
GB346665A 1962-08-01 1965-01-26 Improvements in or relating to tractor hydraulic control systems Expired GB1101775A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21512362A 1962-08-01 1962-08-01
US341548A US3275084A (en) 1964-01-31 1964-01-31 Tractor hydraulic control system

Publications (1)

Publication Number Publication Date
GB1101775A true GB1101775A (en) 1968-01-31

Family

ID=35134656

Family Applications (1)

Application Number Title Priority Date Filing Date
GB346665A Expired GB1101775A (en) 1962-08-01 1965-01-26 Improvements in or relating to tractor hydraulic control systems

Country Status (1)

Country Link
GB (1) GB1101775A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002355A1 (en) * 1979-05-09 1980-11-13 Massey Ferguson Services Nv Tractor hydraulic control systems
EP0066380A2 (en) * 1981-05-14 1982-12-08 Massey-Ferguson Services N.V. Lever mechanisms
EP0580034A1 (en) * 1992-07-20 1994-01-26 Deere & Company Hitch control interface assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002355A1 (en) * 1979-05-09 1980-11-13 Massey Ferguson Services Nv Tractor hydraulic control systems
US4492080A (en) * 1979-05-09 1985-01-08 Massey-Ferguson Services N.V. Tractor hydraulic control systems
EP0066380A2 (en) * 1981-05-14 1982-12-08 Massey-Ferguson Services N.V. Lever mechanisms
EP0066380A3 (en) * 1981-05-14 1983-11-30 Massey-Ferguson Services N.V. Lever mechanisms
US4478104A (en) * 1981-05-14 1984-10-23 Massey-Ferguson Services N.V. Lever mechanism
EP0580034A1 (en) * 1992-07-20 1994-01-26 Deere & Company Hitch control interface assembly

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