Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1992-03-09
1993-03-23
Luong, Vinh T.
Machine element or mechanism
Control lever and linkage systems
Elements
296223, B62D 106, B60J 7057
Patent
active
051953951
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Field of Invention
The invention relates to a crank mechanism for lift-slide covers disposed in the ceiling of motor vehicles.
Lift-slide covers disposed in the ceiling of motor vehicles are as a rule operated with hand cranks. It should therein be possible to carry out at least two functions with these hand cranks: the lifting of the cover about a given angle relative to an axis extending parallel to the to the ceiling of the motor vehicle as well as the sliding of the cover parallel to the motor vehicle cover. After completion of the particular function the hand crank often is in addition to be foldable into a sunken recess so that the interior side of the cover of the motor vehicle has no protruding edges. This folding-in moreover should, in addition, also be possible from each final position of the hand crank which means an additional difficulty because the crank arm can often only be folded into the sunken recess if it is in a particular position. Whether the lift-slide cover is to be lifted or slid with the hand crank can for example be decided by reversal of the direction of rotation. The cranking in the clockwise direction causes therein for example the lifting of the cover while the cranking in the counterclockwise direction effects the sliding of the cover. It is of importance in this case that a zero position between both directions of rotation is defined.
A crank drive for lift-slide roofs of motor vehicles is already known in which a crank arm is swivelled about its swivel axis into a particular position and its end extended beyond the swivel axis comes into contact with a hook at the lower end of the pin whereby this pin is pulled in the downward direction against the effect of a spring (DE-OS 24 26 765). Through the motion of the pin an outer toothing is brought out of engagement with an inner toothing at a drive pinion so that the crank arm together with a sleeve and the pin is rotatable into a position from which it can be swivelled into a sunken recess. Through the swivelling of the crank arm it is consequently no longer possible to swivel the lift-slide roof. However, in the case of this known crank drive it is of disadvantage that the crank arm before the swivel motion must first be brought from its operation position into a position which is directed counter to the later swivel motion.
Hereby the crank arm assumes three quasi-stable positions which with respect to its operation is awkward.
A similar manually operated crank and drive mechanism for a lift-slide cover with which it is possible to fold the crank arm with a multiplicity of positions of displacement of the cover into a sunken recess is known from DE-P 24 42 7190. Herein all functions for the actuation of the slide cover, specifically the sliding as well as also the setting as well as also the releasing of the latching in the closure position for enabling the setting motion can be carried out with a single actuation member specifically the crank arm. It is herein of disadvantage that the crank arm must be latched in three different positions. A first position is required when lifting the cover, a second during normal sliding of the cover, and a third in the folded-in position.
Further, a device is known for limiting the number of rotations of a shaft for rotatable drives of sliding roof drives in motor vehicles in which for two different motion progressions which can be brought about with the same shaft for optional sliding or setting when swivelling in the slide cover in spite of the setting paths which are of different length for the two motions and which are to be limited by means of the device only one shift position is provided to simplify the operation of the slide roof equipped with two shift functions (DE-P 23 33 666). Herein is slidably disposed parallel to the shaft a locking pin which permits in its shifted-in final position both directions of rotation of the drive and in its disengaged position blocks the drive in both directions. Herein is of disadvantage that the hand crank first
REFERENCES:
patent: 4023858 (1977-05-01), Bienert et al.
patent: 4162805 (1979-07-01), Hirschberger
patent: 4222602 (1980-09-01), Kouth
patent: 4651594 (1987-03-01), Vogel et al.
patent: 4841812 (1989-06-01), Fuerst et al.
Partial Translation of West German O.S. No. 3,200,289; IPC.
LandOfFree
Crank mechanism for a lift-slide cover 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 Crank mechanism for a lift-slide cover of a motor vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crank mechanism for a lift-slide cover of a motor vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1344301