Non-contact rotation waterproof and dustproof method and machine using the same
AssigneeOkuma Corporation
InventorsHideo Yuhara, Toshio Yagami
Life of this patent
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Abstract
A non-contact rotation waterproof and dustproof method and a machine tool using the same. A viscous fluid is continuously or intermittently supplied to a labyrinth clearance formed between a rotating body and a fixed body from a fluid supply device so as to fill the viscous fluid into the labyrinth clearance to obtain a good non-contact rotation waterproof and dustproof method even when the rotating body is rotated at a low speed or is stopped.
Claims15
A method of providing a waterproof and dustproof labyrinth clearance for non-contact rotation between a rotating body and a fixed body, comprising the steps of supplying a viscous fluid continuously into the labyrinth clearance independently of rotation of the rotating body via a supply path to an eccentrically arranged distribution groove on a clutch ring located between the rotating body and the fixed body and maintaining the continuous supply of the viscous fluid in the labyrinth clearance to prevent ingress of water and dust at both a rotating state and a non-rotating state of the rotating body.
A machine tool having a labyrinth clearance between a rotating body and a fixed body, comprising:
- a labyrinth clearance filled with a viscous fluid;
- and
- a fluid supply device for supplying the viscous fluid to the labyrinth clearance via a supply path to an eccentrically arranged distribution groove on a clutch ring located between the rotating body and the fixed body independently of rotation of the rotating body such that waterproof and dustproof protection is provided at both a stopped state and a rotating state of the rotating body.
Dependencies are inferred from the claim text.