| 摘要 |
PURPOSE: A parking unit of an automatic transmission is provided to make transformation of pressure angle possible and to softly release parking by forming a parking pole with two bars. CONSTITUTION: A parking unit(20) of an automatic transmission is composed of a first parking pole(22), a second parking pole(24), a first stopper(26), a second stopper, and a cam(30). The first parking pole forms a parking protrusion to combine by the drive of the cam when a select lever selects parking range to the parking grooves formed on the peripheral face of the annulus gear(34) of the epicyclic gear set installed an output shaft(32). The second parking pole is connected to the first parking pole by a hinge pin(40) and installed to be rotated by a fixing pin(44) so as to return by a return spring(42). The first stopper is formed to the transmission case to control unidirectional rotation of the first parking pole and goes forward and backward by being installed in the same longitudinal direction with the output shaft. The second stopper is formed to the transmission case to control unidirectional rotation of the second parking pole. The cam is installed in parallel to the output shaft to push the first parking pole and to interlock forward and backward the first stopper. |
