GB1516116A - Closed-circuit hydrostatic transmission and an axial piston machine for same - Google Patents

Closed-circuit hydrostatic transmission and an axial piston machine for same

Info

Publication number
GB1516116A
GB1516116A GB34353/75A GB3435375A GB1516116A GB 1516116 A GB1516116 A GB 1516116A GB 34353/75 A GB34353/75 A GB 34353/75A GB 3435375 A GB3435375 A GB 3435375A GB 1516116 A GB1516116 A GB 1516116A
Authority
GB
United Kingdom
Prior art keywords
valve
motor
pump
valves
pressure
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
GB34353/75A
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of GB1516116A publication Critical patent/GB1516116A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/431—Pump capacity control by electro-hydraulic control means, e.g. using solenoid valves
    • 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
    • F01B3/109—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block by changing the inclination of the axis of the cylinder barrel relative to 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/106—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being an axial piston pump
    • 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
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4061—Control related to directional control valves, e.g. change-over valves, for crossing the feeding conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1516116 Hydrostatic transmission control LINDE AG 19 Aug 1975 [20 Aug 1974] 34353/75 Heading F2W [Also in Division F1] In a hydrostatic transmission for a motor vehicle having a pump in closed circuit with a motor, the pump or motor is a tilting head unit 6 having a displacement variable between zero and a maximum and a reversing valve 21 or 165, 169, 170, 171 in the circuit between the pump and motor is provided in a base plate 12 of the unit housing 1. The unit 6 which is preferably a pump has a plate 10 secured to the end of its tilting head. The plate 10 has a cylindrical surface 11 which slides in a complementary recess in the base plate 12 and the plate 10 is connected by a rod 14 to the piston 29 of a follow-up servomotor that is housed in the base plate 12. A control valve 30 for the follow-up servomotor is connected by a linkage 31, 33, 44 and 62 to a manual control lever 60. In Figs. 3 and 4 the reversing valve comprises an axially slidable valve spool 21 which is biased by springs to a central position in which it blocks flow between the pump and motor. Alternatively the valve 21 may interconnect the pump lines in its central position. The valve spool 21 is moved to one or other of its end positions for forward or reverse drive by pressure liquid supplied through a valve 38 to one or other of its ends. The valve 38 is controlled by the lever 60. The lever 60 preferably actuates the valve 38 prior to actuation of the follow-up servomotor. In Fig. 11 the reversing valve comprises fluid pressure actuated valves 165, 169, 170, 171 which selectively connect pump lines 167, 168 with motor lines 163, 164. A control valve 138 selectively supplies pressure liquid to the valves 165, 169, 170, 171 to open valves 165, 170 or valves 168, 171 for forward or reverse drive. A shuttle valve 175 connects the motor line at the higher pressure to an override valve 178. When the motor supply pressure exceeds a predetermined value the valve spool 178 is moved left and connects the control pressure line 182 to exhaust at 183 whereupon all the valves 165, 169, 170, 171 open to provide a by-pass between the pump delivery and return lines. The override valve 178 may be actuated manually by a screw 189 to permit towing of the vehicle. In Fig. 13 (not shown) the shuttle valve (185) additionally supplies make-up liquid to the low pressure motor line.
GB34353/75A 1974-08-20 1975-08-19 Closed-circuit hydrostatic transmission and an axial piston machine for same Expired GB1516116A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2439830A DE2439830A1 (en) 1974-08-20 1974-08-20 HYDROSTATIC GEAR AND ADJUSTABLE AXIAL PISTON MACHINE FOR SUCH

Publications (1)

Publication Number Publication Date
GB1516116A true GB1516116A (en) 1978-06-28

Family

ID=5923618

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34353/75A Expired GB1516116A (en) 1974-08-20 1975-08-19 Closed-circuit hydrostatic transmission and an axial piston machine for same

Country Status (4)

Country Link
DE (1) DE2439830A1 (en)
FR (1) FR2282583A1 (en)
GB (1) GB1516116A (en)
IT (1) IT1040469B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3638890A1 (en) * 1986-07-31 1988-02-04 Hydromatik Gmbh AXIAL PISTON WITH A CIRCUIT RINSING DEVICE
DE102013221625B4 (en) 2013-10-24 2024-06-06 Robert Bosch Gmbh Hydraulic adjustment device for an axial piston machine in swash plate design with a control pressure control valve arranged inside the control piston, which can be controlled by a pilot valve and via feedback of the travel of the control piston
DE102019205140A1 (en) * 2019-04-10 2020-10-15 Robert Bosch Gmbh Axial piston machine with valve spools integrated in the connection plate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1947385U (en) * 1965-04-12 1966-10-06 Bucher Johann Maschf HYDROSTATIC DRIVE WITH ROTATING HYDROMOTOR.
GB1254292A (en) * 1968-03-27 1971-11-17 Dowty Technical Dev Ltd Variable displacement pump
DE2129830C3 (en) * 1971-06-16 1975-04-24 Verlinde S.A., Loos, Lille (Frankreich) Hydraulic servo control device for setting the ratio of a hydrostatic transmission
FR2200799A5 (en) * 1972-09-25 1974-04-19 Peugeot & Renault

Also Published As

Publication number Publication date
FR2282583B1 (en) 1981-04-30
FR2282583A1 (en) 1976-03-19
IT1040469B (en) 1979-12-20
DE2439830A1 (en) 1976-03-11

Similar Documents

Publication Publication Date Title
US2916879A (en) Combination hydraulic power unit
US3700396A (en) Electro-hydraulic flow control circuit
US3736845A (en) Variable length upper guide rod for a three-point loading rack
US2985147A (en) Hydraulic valve
US3216444A (en) Bi-directional variable flow rate control valve
GB1263118A (en) A hydraulic control system
GB1293931A (en) Hydraulic apparatus
GB1516116A (en) Closed-circuit hydrostatic transmission and an axial piston machine for same
US2910085A (en) Flow divider
US2274226A (en) Broaching machine
US3554089A (en) Servosteering system
US3044266A (en) Hydraulic actuating method
US2399756A (en) Fluid control for fluid-driven motors
US2728194A (en) Control circuit for hydraulic power transmission
US2962001A (en) Hydro-pneumatic power mechanism
US2879745A (en) Dual throttling motor control circuit
GB1472656A (en) Reversible hydrostatic transmission
US2823690A (en) Secondary unloader for pump systems
US3433018A (en) Self-compensating servo system control unit
US3167915A (en) Control system for a material spreader machine
US3126753A (en) means for effecting rotation of a worm wheel
GB1327547A (en) Hydraulic steering system
US2769502A (en) Hydraulic power steering mechanism for vehicles
US2558960A (en) Hydraulic power transmitting device
GB1310351A (en) Hydrostatic transmission systems

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee