GB1185905A - Hydraulic Motor Control Circuits - Google Patents

Hydraulic Motor Control Circuits

Info

Publication number
GB1185905A
GB1185905A GB38138/67A GB3813867A GB1185905A GB 1185905 A GB1185905 A GB 1185905A GB 38138/67 A GB38138/67 A GB 38138/67A GB 3813867 A GB3813867 A GB 3813867A GB 1185905 A GB1185905 A GB 1185905A
Authority
GB
United Kingdom
Prior art keywords
pump
valve
plus
spool
motor
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
GB38138/67A
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor 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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB1185905A publication Critical patent/GB1185905A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • E02F3/65—Component parts, e.g. drives, control devices
    • E02F3/651—Hydraulic or pneumatic drives; Electric or electro-mechanical control devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1,185,905. Hydraulic motor control circuits. CATERPILLAR TRACTOR CO. Aug.18, 1967 [Sept.30, 1966], No.38138/67. Heading F1P. [Also in Division E1] A variable speed hydraulic motor 18 for driving the elevator of a self-loading scraper vehicle is supplied by a first pump 41 which delivers to the inlet 43 of a by-pass valve 14 which in the neutral position shown connects pump delivery to a reservoir 22, whereas the valve 14 when position S blocks said inlet 43 and allows pump pressure to drive motor 18, and the steering motor (not shown) of the vehicle is controlled by a valve 19 which is continuously connected through a line 53 with a second pump 53 and is also connected through a two-position spool valve 58 and a line 57 with a third pump 54 when said valve 58 is in the position shown; the valve 58 when its spool 62 is moved leftwards to its other position serving the divert delivery of pump 54 past a non-return valve 71, an outlet and a line 74 leading to the delivery side of pump 41 thereby allowing the speed of the motor to be increased. In a modification the motor (18, Fig. 2, not shown) may be driven at four speeds by being subjected to the delivery of pump (41<SP>1</SP>) only, pump (41<SP>1</SP>) plus a pump (84) which is connected also to by-pass valve (14<SP>1</SP>), pump (41<SP>1</SP>) plus pump (54<SP>1</SP>) when the diverter valve (58<SP>1</SP>) is in its displaced position and by pump (41<SP>1</SP>) plus (54<SP>1</SP>) plus (84). In the above embodiments the spool of the diverter valve 58 (58<SP>1</SP>) is actuated by a foot pedal 66, (66<SP>1</SP>) but in a further modification the valve spool is displaced automatically by a pilot piston (96, Fig.3, not shown) driven by pressure from pump (84<SP>11</SP>). In all three embodiments double acting bowl jacks 16 and a double acting ejector jack 17 are supplied by a pump 21 which delivers through a line 23 to two-position control valves 12, 13 as described in U.S.A. Specification 3, 258, 926.
GB38138/67A 1966-09-30 1967-08-18 Hydraulic Motor Control Circuits Expired GB1185905A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US583243A US3386344A (en) 1966-09-30 1966-09-30 Self-loading scraper hydraulic circuit with diverter

Publications (1)

Publication Number Publication Date
GB1185905A true GB1185905A (en) 1970-03-25

Family

ID=24332293

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38138/67A Expired GB1185905A (en) 1966-09-30 1967-08-18 Hydraulic Motor Control Circuits

Country Status (3)

Country Link
US (1) US3386344A (en)
DE (1) DE1634759B2 (en)
GB (1) GB1185905A (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512277A (en) * 1967-03-15 1970-05-19 Clark Equipment Co Control system for two-engine vehicle
US3484960A (en) * 1967-08-31 1969-12-23 Sandvikens Jernverks Ab Apparatus for controlling the position of the elevator in a self-loading elevator scraper
US3530600A (en) * 1967-10-26 1970-09-29 Westinghouse Air Brake Co Earthmoving scrapper with fluidic control means
US3596383A (en) * 1968-08-02 1971-08-03 Louis L Bispo Improved ejection system for elevator scraper
US3535877A (en) * 1969-05-09 1970-10-27 Gen Signal Corp Three-pump hydraulic system incorporating an unloader
US3581415A (en) * 1969-08-28 1971-06-01 Caterpillar Tractor Co Automatic positioning systems for scraper elevators
US3576104A (en) * 1969-09-29 1971-04-27 Caterpillar Tractor Co Control system for hydraulic motors
DE1952034A1 (en) * 1969-10-15 1971-04-22 Linde Ag Control device for a hydraulic system and valve for this
US3731410A (en) * 1971-04-21 1973-05-08 Morrison Knudsen Co Motor grader with device for guiding vehicle along a pair of parallel rails
US3808717A (en) * 1971-08-25 1974-05-07 Westinghouse Air Brake Co Fluid control system for floor and ejector gates of earth bowel scrapers
US3811282A (en) * 1973-01-26 1974-05-21 Caterpillar Tractor Co Hydraulic control circuit for a reversible hydraulic motor
CH567213A5 (en) * 1973-05-17 1975-09-30 Sulzer Ag
US3877345A (en) * 1973-11-19 1975-04-15 Caterpillar Tractor Co Displacement sensitive automatic diverter valve
US3977100A (en) * 1975-09-22 1976-08-31 Fiat-Allis Construction Machinery, Inc. Hydraulic control system for elevating scraper
USRE30127E (en) * 1975-10-31 1979-10-30 Caterpillar Tractor Co. Load ejection improvement for self-loading scrapers
US3977102A (en) * 1975-10-31 1976-08-31 Caterpillar Tractor Co. Load ejection improvement for auger scrapers
US4141280A (en) * 1977-07-11 1979-02-27 Caterpillar Tractor Co. Dual pump flow combining system
US4121501A (en) * 1977-07-11 1978-10-24 Caterpillar Tractor Co. Flow combining system for dual pumps
US4205864A (en) * 1978-10-12 1980-06-03 Caterpillar Tractor Co. Controlled demand priority hydraulic circuit
US4383412A (en) * 1979-10-17 1983-05-17 Cross Manufacturing, Inc. Multiple pump load sensing system
US4819430A (en) * 1983-01-21 1989-04-11 Hydreco, Inc. Variably charged hydraulic circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879612A (en) * 1956-05-02 1959-03-31 Gar Wood Ind Inc Hydraulic drive for ditcher conveyor
US3258926A (en) * 1963-08-01 1966-07-05 Caterpillar Tractor Co Hydraulic control circuit for selfloading scrapers

Also Published As

Publication number Publication date
DE1634759B2 (en) 1977-04-14
DE1634759A1 (en) 1971-05-06
US3386344A (en) 1968-06-04

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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