| 主权项 |
1. A valve timing control apparatus that controls a rotation phase between a driving shaft and a driven shaft of an internal combustion engine so as to control opening-and-closing timing of an intake valve or an exhaust valve which is driven to open or close by the driven shaft, the valve timing control apparatus comprising:
a rear plate rotated by a driving force transmitted from the driving shaft; a housing fixed to the rear plate to be opposite from the driven shaft through the rear plate in a thickness direction of the rear plate, an oil pressure chamber being defined inside the housing; a vane rotor which is able to rotate relative to the housing, the vane rotor having a rotor having a cylindrical shape and coaxially fixed to the driven shaft, and a vane extending from the rotor outward in a radial direction to divide the oil pressure chamber of the housing into an advance chamber and a retard chamber, the vane having an axial end surface adjacent to the rear plate and a radially outer surface; a first chamfer part defined at a connection between the axial end surface and the radially outer surface of the vane so as to reduce a contact pressure applied from the rear plate to the vane, the first chamfer part comprising a taper part in which a radial distance in the radial direction is larger than an axial distance in the axial direction; and a second chamfer part defined at a connection between an axial end surface of the rotor and a radially outer surface of the rotor so as to reduce a contact pressure applied from the rear plate to the rotor. |
