Wiper device with elastic bush for absorbing excess load
AssigneeAsmo Co., Ltd.
InventorShuichi Irikura
Life of this patent
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Abstract
A wiper device for a vehicle which, when abnormal load is applied, absorbs the abnormal load so that wiping operation by a wiper blade can be carried out continuously. The wiper device is compact, and dimensional management thereof is easy. One end of a first crank lever forming a portion of a crank arm is attached to an output shaft, whereas a cylindrical portion is fixed by caulking to another end of the first crank lever by a pin. An annular portion is formed at one end of a second crank lever. An elastic rubber bush is interposed between the cylindrical portion and the annular portion. The first crank lever and the second crank lever are supported by the elastic rubber bush so as to be freely rotatable.
Claims8
A wiper device for a vehicle comprising:
- a crank arm connected to an output shaft of a motor for rotary motion;
- a link rod pivotally connected to said crank arm so as to be freely rotatable with respect thereto;
- a pivot lever pivotally connected to said link rod so as to be freely rotatable with respect thereto;
- and
- a wiper arm connected to said pivot lever via a pivot shaft for moving a wiper blade over a windshield,
- wherein said crank arm is formed by a first lever which is connected to the output shaft for rotation therewith, a second lever which is pivotally connected to said link rod so as to be freely rotatable with respect thereto, and an elastic bush interposed between said levers and coupled thereto which torsionally deforms elastically, upon excess loading of the wiper blade in accordance with relative rotation between said first lever and said second lever.
Dependencies are inferred from the claim text.