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Bearing unit and main spindle device of machine tool provided with bearing unit

一种轴承、主轴的技术，应用在轴承元件、轴承部件的刚性支架、轴承等方向，能够解决构造复杂、成本变高、大配置空间等问题，达到简单构造、防止轴承寿命变短的效果

Active Publication Date: 2008-05-14
DMG MORI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The mechanism for supporting the release tool force described above needs to be constructed so that it does not interfere with the rotation of the main shaft during normal operation and can reliably support the release tool force to the main shaft during tool exchange. Therefore, the structure is complicated and the cost becomes large. High, while requiring a relatively large configuration space

Method used

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  • Bearing unit and main spindle device of machine tool provided with bearing unit
  • Bearing unit and main spindle device of machine tool provided with bearing unit
  • Bearing unit and main spindle device of machine tool provided with bearing unit

Examples

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Embodiment Construction

[0061] Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views for explaining a spindle device of a machine tool including a bearing unit according to a first embodiment of the present invention.

[0062]In the figure, reference numeral 1 is a spindle device of a machine tool, and the spindle device 1 includes: a spindle 2; a draw bar unit (draw bar unit) 3 inserted into a draw bar hole 2a formed in the shaft core of the spindle 2; and a housing 6, The main shaft 2 is rotatably supported via a front bearing unit 4 and a rear bearing unit 5 . In addition, reference numeral 7 denotes a built-in spindle motor interposed between the housing 6 and the spindle 2 , and the spindle 2 is rotationally driven by the spindle motor 7 .

[0063] The tie rod unit 3 inserts a tie rod 3a into the tie rod hole 2a of the spindle 2 so as to be able to advance and retreat in the axial direction, and arranges it at the front end of the tie rod ...

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PUM

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Abstract

A bearing unit capable of withstanding a large axial force based on a simple structure including: a bearing 10 having an internal ring 13 fitted to an inside member 2, an outer ring 14 fitted to an outside member 6, lots of rolling elements 15 disposed between the outer ring 14 and the inner ring 13; and a transmitting direction shifting means A transmitting an axial force F from the inner ring 13 to the outside member 6 when the axial force F transmitted from the inside member 2 to the internal ring 13 exceeds a predetermined value or above, and a main spindle device of a machine tool, which is provided with the bearing unit, are provided.

Description

technical field [0001] The present invention relates to a bearing unit and a spindle device of a machine tool having the bearing unit. The bearing unit is provided with a bearing in which a plurality of rotating bodies are arranged between an inner ring and an outer ring, and an axial force direction conversion which converts a shaft direction force transmission path. device. Background technique [0002] Between the inner ring mounted on the rotating shaft and the outer ring mounted on the housing (housing) side, a plurality of rotating body type bearings, for example, angular ball bearings (angular ball bearings), acting on the rotating shaft Axial force is transmitted from the rotating shaft to the housing side via the inner ring, the rotating body (balls), and the outer ring. At this time, when the aforementioned axial force exceeds a predetermined allowable axial load, problems such as indentation on the raceway surface may occur. [0003] In a bearing for a spindle o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/10F16C35/12B23Q5/04
CPCF16C19/522F16C39/02F16C19/542B23B31/265B23Q1/70F16C19/163F16C2322/39Y10T408/65Y10T409/309352Y10T409/309464F16C23/00F16C23/04F16C35/00F16C35/06
Inventor 望月昭博新家秀规藤冈一也西木孝浩
Owner DMG MORI CO LTD
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