Patent ID: 11939892
Assignee: DENSO CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A valve timing adjustment device configured to adjust valve timing of a valve that is driven to open or close by a camshaft to which an engine torque is transmitted from a crankshaft in an internal combustion engine, the valve timing adjustment device comprising:
a driving rotating body that rotates in conjunction with the crankshaft;
a driven rotating body that rotates in conjunction with the camshaft;
a reduction mechanism configured to change a relative rotation phase of the driving rotating body and the driven rotating body by a driving force of an actuator, the reduction mechanism including
an internal gear portion having internal teeth formed inward in a radial direction, and
an external gear portion having external teeth formed outward in the radial direction to mesh with the internal teeth; and

a filter unit capable of capturing a foreign matter contained in lubricating fluid supplied into the reduction mechanism, wherein
the driven rotating body has a supply hole penetrating in an axial direction to supply the lubricating fluid into the reduction mechanism through the camshaft,
the filter unit has a plurality of holes penetrating in the axial direction, and the plurality of holes are arranged in a flow path for the lubricating fluid connected to the supply hole,
the filter unit is provided on a spacer configured to adjust a gap inside the reduction mechanism in the axial direction; and
the filter unit directly contacts the reduction mechanism and the driven rotating body.