Machine element or mechanism – Control lever and linkage systems – Multiple controlled elements
Patent
1991-10-29
1993-02-16
Herrmann, Allan D.
Machine element or mechanism
Control lever and linkage systems
Multiple controlled elements
F16H 6336
Patent
active
051860708
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a gear-change device for the transmission of a motor vehicle comprising fork-like shift elements, preferably gear-change levers, which engage in sliding sleeves and via at least one gear-shift shaft are pivotable around parallel swivel bearings from their neutral position into shift positions, locking means stationarily situated in the transmission housing coacting with locking grooves formed in locking levers fastened to the gear-change levers in a manner such that when one gear-change lever pivots into a shift position, the other gear-change levers are locked in their neutral position.
DESCRIPTION OF THE RELATED ART
A gear-change device a of the above kind has been disclosed in DE-OS 21 25 278. Three balls offset by 120.degree. in respect to each other are situated in a central ball cage and overlapped by fork-like end sections of the locking levers. If one gear-change lever is pivoted around its swivel bearing, the fork-like section of the locking lever connected with the gear-change lever moves into the ball cage the balls lying in the notch thereof. Thereby it presses the other two balls into the fork-like ends of the other locking levers. Such a locking system is applicable only with limitations, since the swivel axes of the gear-change levers must be situated in a specific position as symmetrically as possible with respect to the ball cage, as otherwise complicated additional transmission means are required.
Therefore, the invention is based on the problem of providing a system consisting of locking means and locking grooves which can be used for transmissions of different configurations using parts that are as equal and simple as possible.
SUMMARY OF THE INVENTION
This problem is solved by the fact that there is respectively situated between the gear-change levers a twin-arm rocker which is supported in the transmission housing parallel to the swivel bearing and engages in the locking grooves via end-side locking cams. If one of the two gear-change levers is moved from its neutral position to a shift end position, the locking cam in this gear-change lever leaves the locking groove and the rocker, with its locking cam situated in the other leg, exerts its locking action on the opposite gear-change lever. The locking device can be constructed at low cost and require small space. But, in addition, there also obviously exists the possibility of applying the invention to shift forks which are longitudinally movable over selector rails. In this case, a locking element having locking grooves is situated in each shift fork.
In one embodiment of a gear-change device for the transmission of a motor vehicle comprising more than two gear-change levers lockable with respect to each other, the legs of the rockers that face each other must be interconnected by means of transmission elements. If a gear shift is effected in a gear-change lever, the corresponding rocker does not lock only the opposite gear-change lever; the transmission element transmits the movement of the rocker to at least another rocker which engages in the locking groove coordinated therewith. Thus, the locking system can be extended by the transmission elements to several gear-change levers or pairs of gear-change, levers.
The locking lever of a gear-change lever upon which act two rockers must have two oppositely extending locking grooves. The question here is the gear-change levers which are within a serial arrangement of rockers. If such a gear-change lever is actuated, both rockers lock by opposite movements the two respectively adjacent gear-change levers. By the legs of said rockers engaging in locking grooves extending in opposite directions, the transmission elements can be advantageously disposed in a manner such that a serial shift of the rockers is possible.
It is proposed for the locking levers, and the locking grooves to be situated on both sides or on one side of the swivel bearing of the gear-change lever. The adequate design of the locking lever as one-arm or two-arm lever depends on the spatial con
REFERENCES:
patent: 2220543 (1940-11-01), Peterson
patent: 2366655 (1945-01-01), Russey
patent: 3242759 (1966-03-01), Magg et al.
patent: 3444752 (1969-05-01), Fisher et al.
patent: 3486392 (1969-12-01), Ivanchich
patent: 3527116 (1970-09-01), Kimberlin
Nitzschke Rudiger
Schetter Martin
Herrmann Allan D.
Zahnradfabrik Friedrichshafen AG
LandOfFree
Gear-change device for the transmission of a motor vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gear-change device for the transmission of a motor vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gear-change device for the transmission of a motor vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2140821