GB1381366A - Step variable displacement hydraulic motor - Google Patents

Step variable displacement hydraulic motor

Info

Publication number
GB1381366A
GB1381366A GB5807472A GB5807472A GB1381366A GB 1381366 A GB1381366 A GB 1381366A GB 5807472 A GB5807472 A GB 5807472A GB 5807472 A GB5807472 A GB 5807472A GB 1381366 A GB1381366 A GB 1381366A
Authority
GB
United Kingdom
Prior art keywords
passages
speeds
return
pistons
groups
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
GB5807472A
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of GB1381366A publication Critical patent/GB1381366A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0447—Controlling
    • F03C1/045—Controlling by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g. series-parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0409—Cams

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)

Abstract

1381366 Hydraulic reciprocating motors DEERE & CO 15 Dec 1972 [17 Dec 1971] 58074/72 Heading F1A In a variable-speed hydraulic motor comprising a rotary cylinder block 34 with spring-loaded, radial pistons 38 engaging a multi-lobed cam track 22 through rollers 40, the cylinder ports 48 communicate sequentially with valve face passages 61 connected to at least four passages 51 to 54 which are selectively connectable by valves to pressure supply or return, such that the motor can be operated in forward or reverse rotation at different speeds. The different speeds are obtained by connecting selected passages 51 to 54 to return so that associated groups of pistons idle. The cam lobes may be in groups of sequentially increasing height to provide different displacements, e.g. heights in the ratio 1:2 to give three speeds, Figs.5 and 6 (not shown), and 1:2:4 to give seven speeds, pilot-operated slide valves being provided to connect the appropriate groups of cylinders to supply and return, Figs.4, 6 and 8 (not shown). Balancing pistons 65 in alternate passages 61 bear against a thrust bearing 66.
GB5807472A 1971-12-17 1972-12-15 Step variable displacement hydraulic motor Expired GB1381366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20915471A 1971-12-17 1971-12-17

Publications (1)

Publication Number Publication Date
GB1381366A true GB1381366A (en) 1975-01-22

Family

ID=22777576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5807472A Expired GB1381366A (en) 1971-12-17 1972-12-15 Step variable displacement hydraulic motor

Country Status (6)

Country Link
US (1) US3760691A (en)
CA (1) CA964930A (en)
DE (1) DE2256975A1 (en)
FR (1) FR2165503A5 (en)
GB (1) GB1381366A (en)
IT (1) IT986034B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847952A1 (en) * 1978-11-04 1980-05-08 Rexroth Gmbh G L HYDRAULIC AXIAL PISTON ENGINE
US4505185A (en) * 1981-03-20 1985-03-19 Power-Train, Inc. Through-shaft energy converter transmission
AU566382B2 (en) * 1982-12-24 1987-10-15 Renold Plc Cam driven piston pump with variable capacity control
US4581895A (en) * 1984-06-18 1986-04-15 Deere & Company Hydrostatic transaxle assembly
FR2588616B1 (en) * 1985-10-16 1988-01-08 Poclain Hydraulics Sa MECHANISM, PUMP MOTOR, HAVING AT LEAST TWO SEPARATE ACTIVE CYLINDERS.
FR2611816B1 (en) * 1987-02-25 1989-07-13 Poclain Hydraulics Sa MULTI-CYLINDER PRESSURE FLUID MECHANISM, MOTOR OR PUMP
FR2661456B1 (en) * 1990-04-26 1992-08-14 Poclain Hydraulics Sa PRESSURE FLUID MECHANISM, SUCH AS A MOTOR OR A HYDRAULIC PUMP, WITH MULTIPLE OPERATING CYLINDERS.
DE4313025A1 (en) * 1993-04-21 1994-10-27 Zahnradfabrik Friedrichshafen Hydrostatic-mechanical gear for driving a mixing drum
JP2003278883A (en) * 2002-03-26 2003-10-02 Komatsu Ltd Variable hydraulic motor, and travel driving reduction gear for crawler type vehicle using the same
US8132868B2 (en) * 2004-12-17 2012-03-13 Walker Frank H Hydraulic regenerative braking system for a vehicle
US20080210500A1 (en) * 2005-05-11 2008-09-04 Walker Frank H Hydraulic Regenerative Braking System For a Vehicle
DE102006058076A1 (en) * 2006-12-07 2008-06-19 Zf Friedrichshafen Ag Hydraulic radial piston motor
US8162621B2 (en) * 2007-02-12 2012-04-24 Walker Frank H Hydraulic machine arrangement
US8176838B2 (en) * 2007-02-12 2012-05-15 Walker Frank H Hydraulic machine arrangement
FR2955903B1 (en) * 2010-02-01 2012-03-16 Poclain Hydraulics Ind HYDROBASE-FORMING SUBASSEMBLY FOR HYDRAULIC ENGINES AND METHOD OF ASSEMBLY
FR3030645B1 (en) * 2014-12-17 2019-10-11 Poclain Hydraulics Industrie RADIAL PISTON HYDRAULIC APPARATUS
US10465354B2 (en) 2016-12-15 2019-11-05 Caterpillar Inc. Hydraulic fluid systems for machine implements
EP3608535B1 (en) * 2018-08-09 2021-06-09 Robert Bosch GmbH Hydrostatic radial piston machine
EP4102051A1 (en) * 2021-06-07 2022-12-14 Robert Bosch GmbH Multi piston machine with at least three switchable displacement volumes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2160612A (en) * 1934-02-01 1939-05-30 American Eng Co Ltd Hydraulic transmission
FR1411046A (en) * 1964-06-03 1965-09-17 Poclain Sa Improvements to hydraulic motors with rotary cylinder block
FR1460752A (en) * 1965-10-08 1966-01-07 Poclain Sa Method and device for changing gear for a hydraulic motor
FR1563866A (en) * 1968-02-07 1969-04-18
US3511131A (en) * 1968-06-24 1970-05-12 Deere & Co Hydraulic motor

Also Published As

Publication number Publication date
DE2256975A1 (en) 1973-06-20
CA964930A (en) 1975-03-25
FR2165503A5 (en) 1973-08-03
IT986034B (en) 1975-01-10
US3760691A (en) 1973-09-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee