High-speed mainshaft bearing constant-pressure pre-loading device

A technology of constant pressure preload and high-speed spindle, which is applied in the direction of positioning device, drive device, support, etc. It can solve the problems of poor preloading method of high-speed spindle bearings, achieve the effects of improving rigidity, stable operation, and preventing deviation

Active Publication Date: 2012-09-26
厦门精合电气自动化有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to overcome the shortcomings of poor preloading methods of high-speed spindle bearings in the prior art, and provide a constant-pressure preloading device for high-speed spindle bearings

Method used

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  • High-speed mainshaft bearing constant-pressure pre-loading device
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  • High-speed mainshaft bearing constant-pressure pre-loading device

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings.

[0028] refer to figure 1 and figure 2 , a high-speed spindle bearing constant pressure preloading device of the present invention comprises a spindle box 1, a first bearing 4 and a second bearing 10 arranged at the front and rear ends of the spindle box 1, and a first bearing 4 and a second bearing 10 arranged at the front and rear ends of the spindle box 1. The main shaft 2 in the second bearing 10, the first bearing 4 is fixed in the main shaft box 1 by a bearing front end cover 3 and a bearing rear end cover 5, and an inner sleeve is installed between the first bearing 4 and the second bearing 10 6. The second bearing 10 is installed in a sliding sleeve 12 with interference. The sliding sleeve 12 is in clearance fit with the spindle box 1. A spring 13 is provided on one side of the sliding sleeve 12, and a rear end cover 14 is provided on the rear side of the spri...

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Abstract

The invention relates to a mainshaft prepressing device, in particular to a high-speed mainshaft bearing constant-pressure pre-loading device which comprises a mainshaft box, a first bearing and a second bearing arranged at the front end and the rear end of the mainshaft box, and a mainshaft arranged in the first bearing and the second bearing, wherein the first bearing is fixed on the mainshaft box, an inner sleeve is arranged between the first bearing and the second bearing, the second bearing is arranged in a sliding sleeve in an interference manner, the sliding sleeve is in clearance fit with the mainshaft box, and one side of the sliding sleeve is provided with a pre-loading component. Compared with the prior art, the invention adopts contant-pressure pre-loading, the second bearing is arranged in the sliding sleeve in an interference manner the sliding sleeve is in clearance fit with the mainshaft box, and one side of the sliding sleeve is provided with the pre-loading component, therefore, axial movement can be realized, deformation of a mainshaft system caused by temperature rise under high-speed running can be compensated, stuck phenomenon of the bearing can be avoided, and the work stability of the mainshaft system can be effectively improved.

Description

technical field [0001] The invention relates to a spindle preloading device, in particular to a constant pressure preloading device for a high-speed spindle bearing. Background technique [0002] The main shaft is the heart of all main shaft rotating equipment. The quality of mechanical equipment and the stability of work are closely related to the main shaft transmission. The high-speed spindle of electronic equipment not only requires high-speed operation, but also high-precision operation, low vibration, low noise, and accurate positioning. To achieve the above-mentioned speed and precision of the spindle and control noise, the key to accurate positioning is to apply an appropriate preload to the bearing, improve the machining accuracy of key parts, and add a stop positioning device. [0003] The preloading methods adopted by the existing main bearings are divided into positioning preloading and constant pressure preloading: [0004] The positioning and pre-tightening m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q1/26B23Q5/20B23Q3/12B23Q5/54B23Q23/00B23B19/02
Inventor 郭凡林陈志林续传圣廖建明张海燕
Owner 厦门精合电气自动化有限公司
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