Lash adjuster

摘要

A lash adjuster includes a body formed into a bottomed cylindrical shape, a plunger movably inserted into the body and having a peripheral wall having an oil passage hole, and a partitioning member inserted into the plunger. The plunger defines a high-pressure chamber between the body and a plunger underside and includes a first threaded portion formed in an inner periphery of the peripheral wall. The partitioning member has an oil passage end located above the oil passage hole and an oil passage is defined between an outer surface of the partitioning member and the plunger peripheral wall. A low-pressure chamber is defined inside the partitioning member to reserve hydraulic fluid flowing through the oil passage hole. The hydraulic fluid is then supplied into the high-pressure chamber. The partitioning member has an outer periphery formed with a second threaded portion threadingly coupled with the first threaded portion.

主权项

1. A lash adjuster comprising:
a body formed into a bottomed cylindrical shape; a plunger which is inserted into the body so as to be movable up and down and has a bottom wall having a valve hole formed therethrough and a peripheral wall standing from an outer periphery of the bottom wall and having an oil passage hole formed therethrough, so that the plunger is formed into a bottomed cylindrical shape, the plunger defining a high-pressure chamber between the bottom wall and the body, the plunger including a plunger side threaded portion formed in an inner periphery of the peripheral wall thereof; and a partitioning member having a tubular shape and inserted into the plunger, wherein: in a state where the partitioning member is inserted into the plunger, the partitioning member having an oil passage end located above the oil passage hole and an oil passage is defined between an outer surface of the partitioning member and the peripheral wall of the plunger; a low-pressure chamber is defined inside the partitioning member to reserve hydraulic fluid flowing through the oil passage hole, the oil passage and the oil passage end into the low-pressure chamber, the hydraulic fluid reserved in the low-pressure chamber being supplied through the valve hole into the high-pressure chamber; and the partitioning member has an outer periphery formed with a partitioning member side threaded portion threadingly coupled with the plunger side threaded portion.