Patent ID: 9115611
Filing Date: 2015-08-25
Classification: F01L

Abstract:
1. A variable valve operating apparatus for an internal combustion engine, comprising: an electric motor comprising a motor housing having an accommodating space therein and being made of a magnetic material, at least one permanent magnet disposed on an inner peripheral surface of the motor housing, the permanent magnet having a plurality of magnetic poles along a circumferential direction thereof, a rotor disposed on an inner peripheral side of the permanent magnet so as to be rotatable relative to the permanent magnet, the rotor having a coil wound thereon to form a magnetic flux in a circumferential direction of the rotor upon being energized, and a brush and a commutator which cooperate with each other to carry out changeover between energization and non-energization of the coil; and a speed reducing mechanism configured to reduce a speed of rotation of the electric motor, the speed reducing mechanism comprising a casing, wherein the motor housing and the casing of the speed reducing mechanism are coupled to each other by means of a plurality of bolts inserted from a side of the casing of the speed reducing mechanism into the motor housing, wherein the motor housing comprises a convex portion formed in a portion of the motor housing which is opposed to one axial end of the permanent magnet, the convex portion having a threaded hole into which a tip end portion of each of the plurality of bolts is screwed, respectively, and a projection formed on an axial end surface of the convex portion in alignment with the threaded hole in an axial direction of the threaded hole, and wherein the axial end surface of the convex portion is located further spaced from the one axial end of the permanent magnet than the projection.