ENGINE REAR SEAL

摘要

In an engine rear seal installed to an engine rear portion having an end plate arranged in a motor exterior side of a housing, and a flywheel arranged in a motor exterior side of the end plate, the engine rear seal has an oil seal and a muddy water preventing seal. The muddy water preventing seal integrally has an attaching portion, and a seal lip directed to a diametrically outer side from the attaching portion and slidably coming into close contact with an end surface in the motor exterior side of the end plate. The seal lip has an inclined lip end back surface portion, and is structured such that a lip end comes into contact with the end surface at the low-speed rotating time and the lip end moves away from the end plate on the basis of an action of a centrifugal force at the high-speed rotating time.

主权项

1. An engine rear seal installed to an engine rear portion in which an end plate is arranged in a motor exterior side of a housing, and a flywheel connected to a shaft is arranged in further a motor exterior side of said end plate,
wherein the engine rear seal has an oil seal which is installed to an inner periphery of a shaft hole of said housing and slidably comes into close contact with a peripheral surface of said shaft, and a muddy water preventing seal which is arranged in a motor exterior side of said oil seal, wherein said muddy water preventing seal integrally has an attaching portion which is attached onto the peripheral surface of said shaft, and a seal lip which is provided so as to be directed to an outer side in a diametrical direction from said attaching portion and slidably comes into close contact with an end surface in the motor exterior side of said end plate, wherein said seal lip has a lip end back surface portion which is formed into an inclined surface shape so that an outer diameter becomes smaller according to moving far away from the end surface in the motor exterior side of said end plate, and wherein said seal lip is structured such that a lip end comes into contact with the end surface in the motor exterior side of said end plate when said shaft rotates at a low speed, and said lip end moves away from the end surface in the motor exterior side of said end plate on the basis of an action of a centrifugal force when said shaft rotates at a high speed.