Guide mechanism of machine tool and machine tool

Patent metadata

Field	Value
Publication number	US-9845828-B2
Application number	US-201514924338-A
Country	US
Kind code	B2
Filing date	Oct 27, 2015
Priority date	Oct 28, 2014
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A guide mechanism for a machine tool includes a movement member and a guide member in a form of first and second rails the movement member and the guide member relatively movable to each other. A hydrostatic pressure guide mechanism and a sliding guide mechanism are formed between the movement member and the first and second rails. The hydrostatic pressure guide mechanism includes a static pressure chamber, a seal portion sealing a periphery of the static pressure chamber, and a supply passage configured to supply a lubricating oil into the static pressure chamber.

First claim

What is claimed is:

1. A guide mechanism for a machine tool, comprising:
a first member and a second member relatively movable to each other; and
a hydrostatic pressure guide mechanism and a sliding guide mechanism formed between the first and second members, wherein
the hydrostatic pressure guide mechanism comprises: a smooth guide surface formed on the first member; a static pressure chamber formed on the second member to face the guide surface; a seal portion surrounding the static pressure chamber; and a supply passage configured to supply a lubricating oil into the static pressure chamber; and
the sliding guide mechanism comprises: the smooth guide surface formed on the first member; a slide surface formed on the second member to face and slidingly contact the guide surface; and an oil supply groove formed on the slide surface.

2. The guide mechanism for a machine tool according to claim 1 , wherein
the hydrostatic pressure guide mechanism comprises a recovery passage configured to recover the lubricating oil from the static pressure chamber.

3. The guide mechanism for a machine tool according to claim 2 , wherein
the supply passage supplies the lubricating oil to near the periphery of the static pressure chamber, and
the recovery passage recovers the lubricating oil from a center of the static pressure chamber.

4. The guide mechanism for a machine tool according to claim 1 , wherein
the first member is a guide member and the second member is a movement member relatively movable along the guide member,
the guide member comprises a smooth guide surface, and
the hydrostatic pressure guide mechanism and the sliding guide mechanism are formed between the movement member and the guide surface and use the guide surface in common.

5. The guide mechanism for a machine tool according to claim 4 , wherein
the movement member comprises: the static pressure chamber facing the guide surface; and the seal portion surrounding the static pressure chamber, and
the static pressure chamber and the guide surface define the hydrostatic pressure guide mechanism.

6. The guide mechanism for a machine tool according to claim 4 , wherein
the movement member comprises: the slide surface facing the guide surface; and the oil supply groove formed on the slide surface, and
the slide surface and the guide surface define the sliding guide mechanism.

7. The guide mechanism for a machine tool according to claim 1 , wherein
the sliding guide mechanism is provided inside the machine tool and the hydrostatic pressure guide mechanism is fixed to each end of the sliding guide mechanism.

8. A machine tool comprising the guide mechanism for a machine tool according to claim 1 .

9. The machine tool according to claim 8 , further comprising:
a fixed member;
a movement member configured to move in a horizontal direction relative to the fixed member; and
a guide mechanism for supporting a load extending in the horizontal direction and a guide mechanism for tilt prevention configured to resist inclination relative to the guide mechanism for supporting the load, the guide mechanisms being provided between the fixed member and the movable member.

Assignees

• Toshiba Machine Co Ltd

Inventors

• Tada Atsushi
• Sagara Makoto
• Tsukiji Teruaki
• Arai Takao
• Takeuchi Kazuhiro
• Tsunoda Shun
• Inatsu Masato
• Ishii Yusuke
• Tanaka Yuya

Classifications

• F16C29/025 Primary

  Hydrostatic or aerostatic (this type of bearing for rotary parts F16C32/06) · CPC title

• B23Q1/56

  with sliding pairs only {, the sliding pairs being the first two elements of the mechanism} · CPC title

• B23Q1/38

  using fluid bearings or fluid cushion supports · CPC title

• F16C33/741

  by means of a fluid · CPC title

• B23Q1/70

  Stationary or movable members for carrying working-spindles for attachment of tools or work {(B23Q1/01 takes precedence; designed to be moved by using particular mechanisms B23Q1/44)} · CPC title