Parking brake for an automatic transmission mechanism

摘要

A parking brake for the automatic transmission mechanism of a vehicle so constructed as to affect no adverse influence on the operation of the automatic transmission mechanism even though a change lever is positioned in a parking range while the vehicle is running. The parking brake includes a first roller fixedly disposed to cooperatively rotate with an output shaft; a second roller coaxially movable with the first roller but disposed not to rotate; a restricting unit disposed at a facing surface between the first roller and the second roller to restrict the rotation of the first roller when the first and second rollers are in close adherence; and a driving unit for slidingly moving the second roller according to the selection or non-selection of the change lever to the parking position to couple and detach the first and second rollers.