GB779903A - Improvements in or relating to hydraulic piston-type adjustment means for the adjustment of a liquid-controlled gear, more particularly for motor vehicles - Google Patents

Improvements in or relating to hydraulic piston-type adjustment means for the adjustment of a liquid-controlled gear, more particularly for motor vehicles

Info

Publication number
GB779903A
GB779903A GB25955/54A GB2595554A GB779903A GB 779903 A GB779903 A GB 779903A GB 25955/54 A GB25955/54 A GB 25955/54A GB 2595554 A GB2595554 A GB 2595554A GB 779903 A GB779903 A GB 779903A
Authority
GB
United Kingdom
Prior art keywords
cylinder
piston
liquid
pump
controlled
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
GB25955/54A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB779903A publication Critical patent/GB779903A/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
    • F16H61/433—Pump capacity control by fluid pressure control means
    • 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
    • F16H61/46—Automatic regulation in accordance with output requirements
    • 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
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/465—Automatic regulation in accordance with output requirements for achieving a target input speed

Abstract

779,903. Variable speed hydrostatic transmissions. EBERT, H. Sept. 7, 1954 [Sept. 16, 1953], No. 25955/54. Class 69 (2). In an hydraulic transmission gear comprising a swash-plate pump 23 driving a swash-plate motor 24, the oscillating frame 23a of the pump is controlled by a piston and cylinder device having both main and auxiliary pistons whereby the gear can be controlled within two predetermined ranges. Movement of the main and auxiliary pistons 2, 4 in their cylinder 1 is controlled by a slide member 8 and a valve member 14, the latter being controlled by a centrifugal governor 15. Cams 13, 20 linked together and turned by a handle 20<SP>1</SP> act on the members 8, 14 and prevent an unintentional changeover from one range to another due to fall in engine speed. A control bush 14b is driven by a gear 14c at a speed proportional to that of the driving shaft 23b and the governor 15 thereon controls the member 14 which is also influenced by a spring 16 and the cam 20. Liquid from a pump 19 is supplied to the bush 14b and passes via pipes 9, 10, 11 to a bush 8b enclosing the member 8. When, on movement of members 8 and 14, liquid is supplied via pipes 18, 11 and 5, the pistons 2 and 4 move together to the right-hand end of cylinder 1 (Fig. 1) and the frame 23a is moved by a link 22 to give a 1: 1 drive. If the speed decreases, the spring 16 moves the member 14 towards the left and liquid reaches the cylinder 1, via pipes 18, 10 and 6 and the pistons 2 and 4 move to the left until the piston 4 abuts the cylinder head 1a The frame 23a is now in the position shown in Fig. 1 and the pump 23 delivers no liquid. For reverse drive, cams 13 and 20 are turned and the member 8 is moved to the left and liquid reaches the cylinder 1 via pipes 18, 11 and 7. The piston 2 then moves up to a stop 4a, the piston 4 being held stationary, and the frame 23a is moved in the opposite direction to drive the motor 24 in reverse. In a modification, the end 1a of the cylinder is replaced by an additional piston on the rod 3 sliding in a part of the cylinder 1 extending towards the link 22. In a further modification (Fig. 4) the main piston is fixed on a rotatable shaft 1c and the cylinder 3 is movable to effect adjustment of the transmission ratio. The wall 27 of the moving cylinder has cam slots 27a which move links connected to the swash-plates 23a, 24a of the pump and motor.
GB25955/54A 1953-09-16 1954-09-07 Improvements in or relating to hydraulic piston-type adjustment means for the adjustment of a liquid-controlled gear, more particularly for motor vehicles Expired GB779903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE779903X 1953-09-16

Publications (1)

Publication Number Publication Date
GB779903A true GB779903A (en) 1957-07-24

Family

ID=6687315

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25955/54A Expired GB779903A (en) 1953-09-16 1954-09-07 Improvements in or relating to hydraulic piston-type adjustment means for the adjustment of a liquid-controlled gear, more particularly for motor vehicles

Country Status (1)

Country Link
GB (1) GB779903A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442153A (en) * 1967-05-08 1969-05-06 Sundstrand Corp Hydrostatic transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442153A (en) * 1967-05-08 1969-05-06 Sundstrand Corp Hydrostatic transmission

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