Patent ID: 8387992
Filing Date: 2013-03-05
Classification: F16J,G01D,G01P

Abstract:
1. A sealing device with an encoder comprising a combination of an oil seal mounted in an inner periphery of a shaft hole of an engine block and a magnetic encoder mounted on an end portion of a crank shaft inserted in the shaft hole, wherein the oil seal is provided with a metal ring including an outer cylindrical portion engaged in the inner periphery of the shaft hole and an inner cylindrical portion formed integrally with the outer cylindrical portion through an end face portion, and a seal lip attached to the inner cylindrical portion and formed from a rubber-like elastic body facing toward an interior side, wherein the magnetic encoder has a holder fixed on the crank shaft, and a cylindrical encoder main body attached to an outer surface of a cylindrical portion provided on the holder, said encoder main body having a sensing unit attached to an end portion of the engine block to read magnetic signals, and wherein the metal ring is configured such that the inner cylindrical portion is made longer so as to more protrude toward an exterior side than the outer cylindrical portion, and a front edge at the exterior side of the inner cylindrical portion is inserted in an inner peripheral side of the cylindrical portion of the holder from the interior side, whereby the oil seal and the magnetic encoder are overlapped with each other in the axial direction.