SPINDLE BALANCER FOR MACHINE TOOL

Title:

SPINDLE BALANCER FOR MACHINE TOOL

Document Type and Number:

WIPO Patent Application WO/2002/022306

Kind Code:

A1

Abstract:

A spindle balancer for machine tool capable of surely and effectively reducing a load on a drivingly lifting means for drivingly lifting a spindle unit by using a gas spring, increasing the sealability of the gas spring, and performing lubrication satisfactorily, wherein a gas spring (31) having a cylinder body (32) filled with compressed gas (G) and a rod (50) extending through the rod side end wall member (40) of the cylinder body (32) is installed in vertical attitude, a spindle unit (10) is supported by the gas spring (31) to reduce a load on a drivingly lifting mechanism, a pair of upper and lower annular seal members (42, 43) sealing between the rod side end wall member (40) and the rod (50) are installed inside the rod side end wall member (40), annular oil filled chambers (44, 45) are formed between the rod side end wall member (40) and the rod (50) between the annular seal members (42, 43), and lubrication oil (L) is filled into the oil filled chambers (44, 45) by an oil filling mechanism (60).

Inventors:

KIMURA SEIJI (JP)

Application Number:

PCT/JP2001/008081

Publication Date:

March 21, 2002

Filing Date:

September 17, 2001

Export Citation:

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Assignee:

PASCAL KK (JP)
KIMURA SEIJI (JP)

International Classes:

B23Q1/72; B23Q11/00; F16F9/00; F16F9/02; F16F9/32; B23Q1/00; F16F9/36; F16F15/023; (IPC1-7): B23Q1/70; B23B47/26; F16F9/00; F16F9/32; F16F9/36

Foreign References:

JP2001105256A	2001-04-17
JPH06297217A	1994-10-25
JPH0454614U	1992-05-11
JPH1054435A	1998-02-24
JPH071346U	1995-01-10

Other References: