Convertible top having over center linkage
View Patent ↗A retractable top is movable between an extended position and a retracted position. The top includes a roof cover, a linkage mechanism, a rear bow and an overcenter linkage. The linkage mechanism is pivotally coupled to the vehicle. The rear bow is pivotally coupled to the vehicle. The linkage mechanism supports a front portion of the roof cover. The rear bow supports a rear end of the roof cover. The overcenter linkage extends between the linkage mechanism and the rear bow. The overcenter linkage is movable to an overcenter position for locking the rear bow in the extended position.
1. A retractable top for a motor vehicle having a passenger compartment and a storage space located behind the passenger compartment, wherein the top is movable between an extended position covering the passenger compartment and a retracted position disposed in the storage space, said top comprising:
a linkage mechanism pivotally coupled to the vehicle, the linkage mechanism including a rear link pivotally coupled to the vehicle;
a rear bow pivotally coupled to the vehicle;
a roof cover having a forward portion supported by the linkage mechanism and a rear portion interconnected with the rear bow;
an overcenter linkage having front and rear overcenter links that extend between the rear bow and the rear link of the linkage mechanism, the front and rear overcenter links each having opposite first and second ends, the first end of the rear overcenter link being pivotally coupled to the rear bow at a first pivot, the first end of the front overcenter link being pivotally coupled to the linkage mechanism via a coupling bracket at a second pivot, and the second ends of the front and rear overcenter links being pivotally coupled to each other at a third pivot, the overcenter linkage being movable to an overcenter position to retain the rear bow in the extended position; and
an actuator directly pivotally coupled to the rear overcenter link adjacent the third pivot for actuating the overcenter linkage into and out of the overcenter position.
2. A retractable top as set forth in claim 1 , wherein the linkage mechanism includes a middle rail pivotally coupled to the rear link and a front rail coupled to the middle rail by a four-bar linkage mechanism.
3. A retractable top as set forth in claim 2 including a coupling bracket pivotally interconnecting the front overcenter link to an intermediate link that is pivotally coupled to a link form the four-bar linkage mechanism.
4. A retractable top as set forth in claim 1 , wherein the third pivot is movable to an overcenter position relative to an overcenter line extending between the first and second pivots, wherein the front and rear overcenter links retain the rear bow in the extended position.
5. A retractable top as set forth in claim 4 , wherein the actuator acts along a line that is generally orthogonal to the overcenter line when the top is in the extended position.
6. A retractable top as set forth in claim 1 , including a second actuator for moving the rear link between the extended and retracted positions.
7. A retractable top as set forth in claim 1 , wherein the actuator is a hydraulic actuator.
8. A retractable top as set forth in claim 1 , wherein the rear bow is directly pivotally coupled to a rocker that is directly pivotally coupled to the vehicle.
9. A retractable top as set forth in claim 1 , wherein the actuator is a first actuator and a second actuator is provided for moving the linkage mechanism between the extended and retracted positions.