Hydrostatic fluid guide device

Patent metadata

Field	Value
Publication number	US-9366305-B2
Application number	US-201314093140-A
Country	US
Kind code	B2
Filing date	Nov 29, 2013
Priority date	Dec 10, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

In a hydrostatic fluid guide device, a damping mechanism is provided. A fluid is supplied to the damping mechanism by a hydrostatic pressure caused by natural fall, instead of being pressurized and supplied. Thus, it is possible to suppress a decrease in the pressure of the fluid in a hydrostatic fluid guide mechanism, and to position a movable body with high accuracy by setting rigidity for load support during linear movement of the movable body to a value substantially equal to a design value.

First claim

What is claimed is:

1. A hydrostatic fluid guide device comprising:
a movable body;
a support that supports the movable body so that the movable body is linearly movable;
a hydrostatic fluid guide mechanism that is provided in the movable body and that guides linear movement of the movable body; and
a damping mechanism that is provided in the movable body, and that damps vibration caused in the movable body,
wherein a pressure of a fluid supplied to the damping mechanism is a hydrostatic pressure, and
wherein the hydrostatic fluid guide mechanism includes a land portion formed to protrude toward the support and a frame portion formed to protrude toward the support and to surround the land portion.

2. The hydrostatic fluid guide device according to claim 1 , wherein a supply passage, through which the fluid is supplied to the damping mechanism, is open to atmosphere.

3. The hydrostatic fluid guide device according to claim 1 , wherein a discharge passage, through which the fluid supplied to the damping mechanism is discharged, is opened to atmosphere.

4. The hydrostatic fluid guide device according to claim 2 , wherein the fluid supplied to the hydrostatic fluid guide mechanism is internally circulated and supplied to the damping mechanism through the supply passage.

5. The hydrostatic fluid guide device according to claim 4 ,
wherein the fluid is internally circulated from the land portion and supplied to the damping mechanism, through the supply passage.

6. The hydrostatic fluid guide device according to claim 4 ,
wherein the fluid is internally circulated from the frame portion and supplied to the damping mechanism, through the supply passage.

7. The hydrostatic fluid guide device according to claim 4 , wherein the fluid used in and collected from a guide surface provided at an upper portion of the movable body is supplied through the supply passage.

8. The hydrostatic fluid guide device according to claim 1 ,
wherein the fluid is internally circulated from the frame portion and supplied to the damping mechanism, through the supply passage.

9. The hydrostatic fluid guide device according to claim 1 ,
wherein the hydrostatic fluid guide mechanism is at an end of movable body on a sliding surface of the movable body and the damping mechanism is on the sliding surface adjacent to the hydrostatic fluid guide mechanism.

Assignees

• Jtekt Corp

Inventors

• Yamato Hiroki
• Ando Yoshiaki
• Takeshima Masayuki

Classifications

• F16C29/025 Primary

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

• F16F9/103 Primary

  Devices with one or more members moving linearly to and fro in chambers, any throttling effect being immaterial, i.e. damping by viscous shear effect only (F16F9/53 takes precedence) · CPC title