Patent ID: 8720660
Filing Date: 2014-05-13
Classification: B60T,B60W,F16H

Abstract:
1. A parking lock mechanism of a power transmission apparatus, comprising: a parking pawl engageable with and disengageable from a parking gear provided on a rotation member forming part of the power transmission apparatus, the rotation member being accommodated in a casing forming part of the power transmission apparatus, a parking rod axially movable in response to the operation of a shift lever to be operated by a driver, a parking cam fixedly mounted on the parking rod to be slidable together with the parking rod in response to the axial movement of the parking rod and to allow the parking pawl to be engaged with and disengaged from the parking gear, and a cylindrical member that slidably supports the parking cam, the cylindrical member being positioned with respect to the casing and supported on the casing, the parking lock mechanism further comprising a supply unit that supplies lubrication oil circulating in the casing to a sliding surface of the parking cam, the supply unit being directly provided on the casing, the cylindrical member being constituted by a first cylindrical member having a first inner peripheral portion having an inclined surface that axially slidably supports the parking cam to allow the parking cam to run on the inclined surface in response to the axial movement of the parking rod, the supply unit being constituted by a second cylindrical member constructed to be provided on the casing to be held in abutment with an axial one end portion of the first cylindrical member to position the first cylindrical member with respect to the casing and to be supported on the casing, the second cylindrical member having a second inner peripheral portion held in communication with the first inner peripheral portion of the first cylindrical member, and formed with an upper opening that introduces the lubrication oil circulating in the casing into the second peripheral portion.