Vehicle wiper system and a method for operating a wiper arm linkage
AssigneeRobert Bosch GmbH
InventorJoachim Zimmer
Life of this patent
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Abstract
A wiper system (1) for vehicles, having at least one wiper lever linkage (3) that has at least one wiper arm (35), and a method for operating the wiper lever linkage (3), are proposed. The wiper lever linkage has a first pivot lever (5), which can be coupled to a stationary first shaft (21) in a manner fixed against relative rotation, and a second pivot lever (7) that can be coupled to a stationary second shaft (29) in a manner fixed against relative rotation, the pivot levers being connected in articulated fashion to a coupling element (9). The wiper system (1) is distinguished in that the coupling element (9) is embodied in multiple parts and has a first coupling part (11) and a second coupling part (13), which are coupled to one another with the aid of a joint (15).
Claims9
A wiper system for vehicles, having at least one wiper lever linkage that has at least one wiper arm 35 and that includes a first pivot lever 5, couplable to a stationary first shaft 21 in a manner fixed against relative rotation, and a second pivot 7 lever couplable to a stationary second shaft 29 in a manner fixed against relative rotation, the pivot levers being connected by a first coupling means embodied as a coupling element, the coupling element (9) is embodied in multiple parts and has a first coupling part (11) and a second coupling part (13), which are coupled to one another with the aid of a first joint (15), the at least one wiper arm (35) is secured to the second coupling part (13), the first coupling part is connected on its end opposite to the first joint (15) to the first pivot lever (5) via a second joint (17) and the second coupling part (13) is connected on its end opposite to the first joint (15) to the second pivot lever (7) via a third joint (19), characterized in that, the second coupling part (13) is longer than the first coupling part (11), and the first pivot lever (5) and the second pivot lever (7) are connected by a second coupling means in their swinging motion.
A method for operating a wiper lever linkage of a wiper system for vehicle, the wiper lever linkage having at least one wiper arm 35, a first pivot lever 5, coupleable to a stationary first shaft 21 in a manner fixed against relative rotation, a second pivot lever 7 coupleable to a stationary second shaft 29 in a manner fixed against relative rotation, a first drive crank 43 coupleable to the first shaft 21 in a manner fixed against relative rotation, a second drive crank 45 coupleable to the second shaft 29 in a manner fixed against relative rotation, a coupling member 47 connected in articulated fashion to the drive cranks, the pivot levers being connected by a first coupling means embodied as a coupling element, the coupling element (9) is embodied in multiple parts and has a first part (11) and a second coupling part (13), which are coupled to one another with the aid of a first joint (15), the at least one wiper arm (35) is secured to the second coupling part (13), the first coupling part is connected on its end opposite to the first joint (15) to the first pivot lever (5) via a second joint (17) and the second coupling part (13) is connected on its end opposite to the first joint (15) to the second pivot lever (7) via a third joint (19), the method having the following steps:
- during one wiping cycle, the first and second drive cranks 43, 45 are first pivoted out of an outset position of the wiper lever linkage in the same direction until they are in an extended position, in which the coupling member 47 and the first drive crank 43 are aligned with one another;
- next, upon a displacement of the wiper lever linkage out of the extended position into a turning point position, the first drive crank 43 is pivoted onward in the same direction and the second drive crank 45 is pivoted onward in the opposite direction;
- providing the second coupling part 13 longer than the first coupling part 11, and connecting the first pivot lever 5 and the second pivot lever 7 by a second coupling means in their swinging motion.
Dependencies are inferred from the claim text.