GB1284254A - Improvements in and relating to adjustable stroke axial piston machines - Google Patents

Improvements in and relating to adjustable stroke axial piston machines

Info

Publication number
GB1284254A
GB1284254A GB23617/71A GB2361771A GB1284254A GB 1284254 A GB1284254 A GB 1284254A GB 23617/71 A GB23617/71 A GB 23617/71A GB 2361771 A GB2361771 A GB 2361771A GB 1284254 A GB1284254 A GB 1284254A
Authority
GB
United Kingdom
Prior art keywords
swash
plate
pistons
control
piston
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
GB23617/71A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1284254A publication Critical patent/GB1284254A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/10—Control of working-fluid admission or discharge peculiar thereto
    • F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
    • F01B3/106—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/002—Hydraulic systems to change the pump delivery

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

1284254 Reciprocating pumps and motors ROBERT BOSCH GmbH 19 April 1971 [29 July 1970] 23617/71 Heading F1A In an axial piston pump or motor comprising a rotary cylinder block 9 with pistons 18 engaging a non-rotary swash-plate 23, the angle of tilt of the swash-plate is adjusted by members 29, 29<SP>1</SP> acting through links 26, such that the swashplate pivots about the first axis of the piston shoe 20 of the piston in its top dead centre position, to maintain the clearance between the piston in its top dead centre position and the cylinder end-wall at a minimum and constant. The swash-plate is tiltable on either side of its zero-displacement position. As shown, tilting is effected by differential pistons 27, 27<SP>1</SP> controlled by slide valves 32, 32<SP>1</SP> operated by linked cams 34 , 34<SP>1</SP>. The valves providing a follow-up control. In Fig. 2 (not shown), the control valves are rotated and have helical control grooves within the pistons. In Fig. 3 (not shown), adjusting members 29, 29<SP>1</SP> are moved by electric motor-driven screw mechanisms, sensors detecting the swash-plate inclination being electrically connected to the electric motor control circuit. In Fig.4 (not shown), differential pistons controlling the swashplate are controlled by solenoid valves electrically connected with a control member and sensors detecting the swash-plate inclination. The control apparatus may operate to maintain a constant pump output pressure. Adjusting members 29, 29<SP>1</SP> alternatively may be mounted on casing closure plate 3 in alignment with pistons 18, one member then being held inoperative while the other effects tilting of the swash-plate.
GB23617/71A 1970-07-29 1971-04-19 Improvements in and relating to adjustable stroke axial piston machines Expired GB1284254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702037635 DE2037635A1 (en) 1970-07-29 1970-07-29 Adjustable axial piston machine

Publications (1)

Publication Number Publication Date
GB1284254A true GB1284254A (en) 1972-08-02

Family

ID=5778257

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23617/71A Expired GB1284254A (en) 1970-07-29 1971-04-19 Improvements in and relating to adjustable stroke axial piston machines

Country Status (6)

Country Link
US (1) US3733970A (en)
JP (1) JPS513401B1 (en)
CH (1) CH528017A (en)
DE (1) DE2037635A1 (en)
FR (1) FR2103755A5 (en)
GB (1) GB1284254A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2338747A2 (en) * 1976-01-21 1977-08-19 Tecnoma Variable - output agricultural spray appts. - has electronic variation of pump drive ratio proportional to distance travelled
US4168653A (en) * 1976-12-20 1979-09-25 Caterpillar Tractor Co. Two position variable displacement motor
US4362085A (en) * 1979-06-11 1982-12-07 The United States Of America As Represented By The Secretary Of The Army Flight control system
US4815289A (en) * 1983-06-24 1989-03-28 Sundstrand Corporation Variable pressure control
DE3714888C2 (en) * 1987-05-05 1994-10-06 Linde Ag Adjustable axial piston machine
EP0297928B1 (en) * 1987-07-03 1994-01-19 Honda Giken Kogyo Kabushiki Kaisha Swashplate type variable displacement hydraulic device
DE19608228B4 (en) * 1996-03-04 2006-03-16 Linde Ag Hydrostatic axial piston machine
DE19807443A1 (en) 1998-02-24 1999-08-26 Kleinedler Control mechanism for axial piston machine ensures compatibility of drive to adjustment device
US6406271B1 (en) 1999-05-06 2002-06-18 Ingo Valentin Swashplate type axial-piston pump
US8074451B2 (en) 2008-06-02 2011-12-13 Caterpillar Inc. Electric motor actuation of a hydrostatic pump
SE533414C2 (en) * 2008-09-17 2010-09-21 Parker Hannifin Ab Trunk sensor for a hydraulic device
DE102012221922A1 (en) * 2012-11-29 2014-06-05 Hawe Inline Hydraulik Gmbh Pump, in particular axial piston pump with scanning on the swash plate
US9114798B1 (en) 2012-12-12 2015-08-25 Hydro-Gear Limited Partnership Electric actuator for drive apparatus
CN111458124B (en) * 2020-04-13 2021-03-26 上海交通大学 Plunger pump sliding shoe pair oil film lubrication characteristic test bed capable of controlling oil film clearance
CN113503235B (en) * 2021-06-07 2023-07-25 中航力源液压股份有限公司 Variable adjusting mechanism for hydraulic pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3463087A (en) * 1967-10-16 1969-08-26 Towmotor Corp Control response valve for hydrostatic transmission

Also Published As

Publication number Publication date
US3733970A (en) 1973-05-22
JPS513401B1 (en) 1976-02-03
FR2103755A5 (en) 1972-04-14
DE2037635A1 (en) 1972-02-03
CH528017A (en) 1972-09-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees