GB666325A - Improvements in or relating to control mechanism for agricultural tractor hydraulic systems - Google Patents

Improvements in or relating to control mechanism for agricultural tractor hydraulic systems

Info

Publication number
GB666325A
GB666325A GB2445748A GB2445748A GB666325A GB 666325 A GB666325 A GB 666325A GB 2445748 A GB2445748 A GB 2445748A GB 2445748 A GB2445748 A GB 2445748A GB 666325 A GB666325 A GB 666325A
Authority
GB
United Kingdom
Prior art keywords
valve
lever
section
liquid
control
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
GB2445748A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor 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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Priority to GB2445748A priority Critical patent/GB666325A/en
Publication of GB666325A publication Critical patent/GB666325A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3138—Directional control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • 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
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

666,325. Hydraulic control systems. FORD MOTOR CO., Ltd., and MORRIS, R. P. W. June 1, 1949 [Sept. 17, 1948], No. 24457/48. Class 69 (ii). In an agricultural tractor hydraulic system for controlling an agricultural implement on the tractor the control valve is returned to neutral automatically on completion of a lifting operation by pressure liquid which acts in an annular space between the valve and its lever and causes release of a detent holding the valve and lever. The Fig. shows a tractor hydraulic control system which is divided into two substantially identical sections A, B, one section A for example being for the control of a rear implement operated by a lever m, while the other is for the control of a jack or other required purpose. If desired a tapping on the pressure liquid supply of the first section, so that external apparatus can be connected to it, may be provided. Liquid under pressure from a pump (not shown) enters at e and when control valves c are in their neutral position (as shown) flows back to a reservoir by way of a pipe f. The operation of the section A only will be described. When the control lever of this section is moved into the "lift" position, as shown in dotted lines, the pump is shot off from the reservoir by a valve land a and connected to a passage h by reason of a valve land b uncovering the end of this passage. Liquid then flows through this passage and past non-return valves, i, k to a cylinder l to operate the rear implement lift lever m. When a piston y in the cylinder l reaches the end of its stroke the pressure rises and causes a bye-pass valve n to open so that liquid is supplied to an annular space p at the righthand side of the valve c. This releases the lever from a detent r and a spring s returns the lever to its neutral position. The spring acts through a pin t which carries a stop u so that the spring is unable to move the lever beyond the neutral position. When the control valve is moved into a "lower" position it unseats the non-return valve k and permits liquid to flow from the cylinder l through this valve and through passages in the non-return valve i and a passage not shown in a part w<SP>1</SP> into the space p and back into the reservoir, the land b having uncovered the end of the passage h and a stem part of the valve having moved away from an orifice in a washer q. The position of the part w<SP>1</SP> may be varied to vary the restriction to the flow. The pressure at which the bye-pass valve n opens is adjustable and this pressure may be greater in the case of the section A than in that of the section B. Any number of valve controls can be provided for by utilising a number of different sections. In any section a tapping may be taken to an external connection as indicated at x and x<SP>1</SP> in section A. Portings a<SP>1</SP>, b<SP>2</SP> in the piston valves are provided to allow liquid which may seep into the annular space between the valve and its housing to leak back to the reservoir. External jacks may be operated.
GB2445748A 1948-09-17 1948-09-17 Improvements in or relating to control mechanism for agricultural tractor hydraulic systems Expired GB666325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2445748A GB666325A (en) 1948-09-17 1948-09-17 Improvements in or relating to control mechanism for agricultural tractor hydraulic systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2445748A GB666325A (en) 1948-09-17 1948-09-17 Improvements in or relating to control mechanism for agricultural tractor hydraulic systems

Publications (1)

Publication Number Publication Date
GB666325A true GB666325A (en) 1952-02-13

Family

ID=10212005

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2445748A Expired GB666325A (en) 1948-09-17 1948-09-17 Improvements in or relating to control mechanism for agricultural tractor hydraulic systems

Country Status (1)

Country Link
GB (1) GB666325A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947343C (en) * 1953-04-24 1956-08-16 Bosch Gmbh Robert Power lifting system operated by pressure medium
DE962758C (en) * 1953-05-16 1957-04-25 Bosch Gmbh Robert Hydraulic lifting device, especially power lift for agricultural work equipment
US2828496A (en) * 1953-05-27 1958-04-01 Jacob S Kamborian Sole pressing machine
US3275085A (en) * 1962-08-01 1966-09-27 Massey Ferguson Inc Power operating and control system for tractors

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947343C (en) * 1953-04-24 1956-08-16 Bosch Gmbh Robert Power lifting system operated by pressure medium
DE962758C (en) * 1953-05-16 1957-04-25 Bosch Gmbh Robert Hydraulic lifting device, especially power lift for agricultural work equipment
US2828496A (en) * 1953-05-27 1958-04-01 Jacob S Kamborian Sole pressing machine
US3275085A (en) * 1962-08-01 1966-09-27 Massey Ferguson Inc Power operating and control system for tractors

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