Machine element or mechanism – Control lever and linkage systems – Multiple controlled elements
Patent
1986-04-02
1987-09-08
Husar, Cornelius J.
Machine element or mechanism
Control lever and linkage systems
Multiple controlled elements
74471XY, G05G 916, G05G 902
Patent
active
046915850
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATION
This application is a national phase application corresponding to the International Application PCT/EP No. 85/00357, filed July 19, 1985 and based in turn upon the Luxemburg application PCT/EP No. 84/00237 of Aug. 4, 1984, the priority of which has been claimed.
FIELD OF THE INVENTION
The invention concerns a gear shift device, in particular for geared vehicular transmissions, with a rotating shaft vertically disposed in a housing, with a coupling lever fastened to the upper end of the former and arranged outside the housing, with a manual shift lever above the rotating shaft and linked to the housing in the manner of a universal joint, and with a connecting linkage between the manual shift lever and the rotating shaft.
BACKGROUND OF THE INVENTION
A device of this kind is known (DE-AS No. 26 55 263).
In FIG. 1 of the drawing of DE-AS No. 26 55 263 there is shown a connecting linkage between a rotating shaft arrayed vertically in a housing, with a coupling lever arrayed on the upper end of the former, and a manual shift lever above the rotating shaft linked to the housing in the same manner as universal joint. The shift and selection motions are transmitted from the manual shift lever by means of a shifting shaft which is supported by a linkage support connected to the shifting shaft and the housing via ball and socket joints to the shifting shaft and the housing, and which is arrayed near the rotating shaft and essentially parallel to the rotating shaft.
A connecting linkage of this type is feasible when there is sufficient horizontal distance between the manual shift lever and the rotating shaft, when the length of the shifting shaft is sufficiently large with respect to the length of the coupling lever. The center of the knob of the manual shift lever and the center of the articulation between the shift rod and the coupling lever describe essentially the same space curves; the distortion remains small. However, this distortion increases with decreasing horizontal distance between the manual shift lever and the rotating shaft. When the distance becomes very small, a connecting linkage according to DE-AS No. 26 55 263 is no longer feasible.
OBJECT OF THE INVENTION
It is the object of the invention to provide a gear shift device as described but where a manual shift lever is positioned with very little horizontal distance from the rotating shaft and linked to rotating shaft with the fewest possible connecting elements in such manner that the center of the knob of the manual gear shift lever and the center of the universal joint on the coupling lever describe similar space curves with only little distortion.
SUMMARY OF THE INVENTION
These objects are attained with a gear shift device of the aforedescribed type wherein the manual shift lever and the bell crank are journaled on a common connecting shaft at a distance from one another for rotation about axes which cross each other. The connecting shaft is journaled on the housing at a short distance from an axis of the rotating shaft. A first lever arm of the bell crank is connected to the coupling lever or rotating shaft via a first universal joint which is fixedly connected to one of the two levers, and is rotatable and axially translatable with respect to the other lever while a second lever arm of the bell crank is connected to a coupling arm of the manual shift lever via a second universal joint which is disposed on one of the arms so as to be axially translatable, or fixed, and is movable with respect to the other arm along a slant or inclined guide on the other arm.
The rotating shaft is journaled in the housing in two anti-friction bearings rotatably, and axially translatably in a sliding manner.
The connecting shaft is journaled on the housing in two permanently lubricated and sealed anti-friction bearings in an axially fixed manner.
The manual shift lever and the bell crank on connecting shaft are journaled in an axially fixed manner each in two permanently lubricated and sealed anti-friction bearing
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Cuomo Peter M.
Dubno Herbert
Husar Cornelius J.
Ross Karl F.
Zahnradfabrik Friedrichshafen AG
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