192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1985-04-04
1987-01-06
Herrmann, Allan D.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
74335, 74336R, 74364, 74745, B60K 4122, B60K 4104
Patent
active
046339876
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
The present application is a national phase application corresponding to No. PCT/EP84/00195 based, in turn, on a Europatent application No. EP83/00216 also filed as a PCT application on Aug. 12, 1983.
FIELD OF THE INVENTION
The invention relates to a shifting arrangement for a gear transmission, particularly a multispeed transmission, wherein the speed selection lever follows a movement in accordance within a double H shifting configuration and is mounted with the reach of the driver in a shifting console, wherein a transmission shaft is displaced for path selection and is twisted for gear shifting and with means to control valves which direct the pressure medium from a pressure-medium source to each of the selection cylinder mounted on the gear box for path selection and to the shift cylinder for gear shifting, whereby the shifting arrangement also has locking means and devices for perceptible feedback information through which a gear-shifting is prevented when the coupling is still closed and the driver is advised through the speed selection lever about the shift position of the transmission at the moment.
BACKGROUND OF THE INVENTION
In such a shifting arrangement, the path selection takes place through a displacement of the speed selection lever transversely to the direction of travel and the gear shifting forwards and backwards with respect to the travel direction.
In a shifting console mounted within the reach of the driver all transmission functions needed to shift a transmission are established and are transmitted via a pressure medium to the selection- and shifting cylinders mounted on the gearing and acting upon the gear-shift-lever shaft.
Depending on the type of the gear transmission, for instance main transmission only or a main transmission in combination with an auxiliary transmission, or a multispeed transmission with torque path splitting, the demands on such a shifting arangement are very high, since not only must the desired shifting be transmitted via a pressure medium, but also as known in a mechanically shifted gear box, it is necessary to provide feedback information, recognizable by the driver regarding the shifting status in the gear box itself.
Such an arrangement in the form of a pneumatical shifting arrangement is known from British Pat. No. 1 179 426, and has a shifting console with a speed selection lever shiftable in the gear-shifting gate with a double H shifting pattern for eight forward speeds and one reverse speed. The shift locks act upon the manual shift lever depending upon the position of the clutch via two locking cylinders and a rocker shaft and the feedback about the selected path is mechanically released at the shifting cylinder via pilot valves.
Such arrangements can no longer satisfy the requirements of a shifting arrangement in a modern transmission, which needs for the transmission of the selection and shifting alone a large number of conduit connections and are cumbersome from the point of view of manufacturing and tuning.
OBJECT OF THE INVENTION
It is therefore the object of the present invention to provide an improved shifting arrangement and to simplify its construction and service.
SUMMARY OF THE INVENTION
This object is attained in accordance with the invention by providing that the selection and shifting motions are transmitted over each of a couple of three-port, two position (3/2) valves mounted on the shifting console and cooperating with cams on the transmission shaft to each of a three-position selection cylinder and two-position shifting cylinder mounted on the gear transmission, whereby the 3/2 valves are mounted next to each other in axial direction for path selection and in circumferential direction for gear selection. In the supply conduits between each of the 3/2 valves and the three-position selection cylinder a safety valve cooperating with the gear-shift-lever shaft and open for passage only in neutral position is mounted. In each of the two conduits for the two-position shifting cylinder
REFERENCES:
patent: 2637222 (1953-05-01), Balkus
patent: 2931237 (1960-04-01), Balkus
patent: 2974766 (1961-03-01), Perkins et al.
patent: 3093008 (1963-06-01), Wight
patent: 3682013 (1972-08-01), Asbery
patent: 3793898 (1974-02-01), Espenschied et al.
Herion Handbook, No. 1, Edition 1969, Herion-Werke KG, pp. 44, 45, 46, Taschenbuch.
Bieber Gerold
Rogner Horst
Schacherer Roland
Dubno Herbert
Herrmann Allan D.
Ross Karl F.
Zahnradfabrik Friedrichshafen AG
LandOfFree
Pressure-medium actuated shifting arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure-medium actuated shifting arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-medium actuated shifting arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-677835