| 摘要 |
PCT No. PCT/DE87/00071 Sec. 371 Date Jan. 29, 1988 Sec. 102(e) Date Jan. 29, 1988 PCT Filed Feb. 26, 1987 PCT Pub. No. WO87/05269 PCT Pub. Date Sep. 11, 1987.A device for wiping automobile windows is proposed. The wiper has a wiper arm that is guided displaceably, by means of a thrust crank mechanism, radially to the pendulum axis on a guide element driven for pendulum motion. On its free end, the wiper arm has a wiper blade placed against the window to be wiped. The guide element has a pendulum lever protruding beyond the pendulum axis, on which lever a gear wheel the axis of rotation of which is located parallel to the pendulum axis is rotatably supported. The gear wheel cooperates with a set of teeth connected to the chassis and concentric with the pendulum axis. In order to attain a wiper step-up gear that operates quietly and is not sensitive to tolerances, the gear wheel is partly encompassed by a toothed belt having a toothed profile on both sides, one tooth profile of which, the outer one, meshes with the teeth connected to the chassis and the other, inner teeth of which mesh with the first gear wheel and the inner teeth furthermore engage a second gear wheel, which is rotatably supported on the guide element and partly encompassed by the toothed belt and is firmly connected to the crank that is part of the thrust crank mechanism.
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