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US 2002/0157204 A1Published application
Wiper arm for windscreen wiper
AssigneeRobert Bosch GmbH
InventorsAchim Kraus, Stephan Mayer
Life of this patent
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AssigneeRobert Bosch GmbH
InventorsAchim Kraus, Stephan Mayer
Estimating the term…
The invention is based on a wiper arm (10) for a windshield wiper comprising a mounting part (12) and an articulated part (14) that are connected to each other via a hinged joint (18) that has a hub (24) permanently connected with one part (14 or 12) and open toward the other part (12 or 14), and an articulated axle (22) permanently connected with the other part (12 or 14), wherein one of the ends of a tension spring (20) is attached to an attachment device (26, 28) of the articulated part (14) and the other end is attached to the mounting part (12), and the hub (24) and the articulated axle (22) mutually loaded in the assembled state, and the hinged joint (18), in a preassembled state of the wiper arm (10) in a defined transport position, grips a seating surface that is situated on the side of the parts named above opposite to the hub (24) in relation to the line of force (46) of the tension spring (20) and is formed by at least one bearing surface (32, 34) on the articulated part (14) and on the mounting part (12) in each case. It is proposed that the bearing surfaces (32, 34) are arranged and/or designed in such a fashion that, with a smaller joint angle (φ) beyond the transport position, the articulated axle (22) moves from its seating surface at the hub (24) toward the open end (48) and thereby increases the preload on the tension spring (20).
Wiper arm (10) for a windshield wiper comprising a mounting part (12) and an articulated part (14) that are connected to each other via a hinged joint (18) that has a hub (24) permanently connected with one part (14 or 12) and open toward the other part (12 or 14), and an articulated axle (22) permanently connected with the other part (12 or 14), wherein one of the ends of a tension spring (20) is attached to an attachment device (26, 28) of the articulated part (14) and the other end is attached to the mounting part (12), and the hub (24) and the articulated axle (22) mutually loaded in the assembled state, and the hinged joint (18), in a preassembled state of the wiper arm (10) in a defined transport position, grips a seating surface that is situated on the side of the parts named above opposite to the hub (24) in relation to the line of force (46) of the tension spring (20) and is formed by at least one bearing surface (32, 34) on the articulated part (14) and on mounting part (12) in each case, characterized in that the bearing surfaces (32, 34) are arranged and/or designed in such a fashion that, with a smaller joint angle (φ) beyond the transport position, the articulated axle (22) moves from its seating surface at the hub (24) toward the open end (48) and thereby increases the preload on the tension spring (20).
Wiper arm (10) according to one of the preceding claims, characterized in that the contour of the attachment device (26) of the tension spring (20) on the mounting part (12) is designed cylindrical in shape toward the articulated part (14) and serves as a bearing surface (34).
Wiper arm (10) according to one of the preceding claims, characterized in that the articulated part (14), when moved into a swung-out position with a joint angle (φ) greater than 180°, reaches a stop (54) for seating and rests against it, and that a latching cam (50) having a latching recess (52) abuts the concave bearing surface (32) toward the open end (48) of the hub (24), into which the convex bearing surface (34) snaps into place in the swung-out position, wherein the latching cam (50) is arranged relative to the stop (54) in such a fashion that the articulated axle (22) is displaced by a displacement length (56) toward the open end (48) of the hub (24), and the line of force (46) of the tension spring (20) extends between the stop (54) and the seating surface of the bearing surface (34) in the latching recess (52).
Dependencies are inferred from the claim text.