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Thrust ball bearing for machine tool main shaft

A thrust ball bearing and machine tool spindle technology, applied in the field of thrust ball bearings, can solve the problems of bearing eccentric load, raceway misalignment between seat washer and shaft washer, shortening of bearing service life, etc., and achieve the effect of prolonging service life

Inactive Publication Date: 2008-09-17
DALIAN KAITELE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such a structural form is used in the case of a horizontal spindle and the outer ring is not fitted, during the assembly process of the spindle, due to the large gap between the inner diameter of the seat ring and the spindle (generally, there is a gap of several millimeters), The seat ring freely sags to the position of the main shaft under the action of gravity, which will cause the raceways of the seat ring and the shaft ring to be out of concentricity, cause the bearing to be unbalanced, and reduce the service life of the bearing

Method used

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  • Thrust ball bearing for machine tool main shaft

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in detail as follows:

[0010] Such as figure 1 As shown, a thrust ball bearing for a machine tool spindle of the present invention is mainly composed of a spindle 1, a bearing ring 2, a steel ball assembly 3, a bearing race 4 and a machine tool box 5, and the thrust ball bearing is not included in the overall structure of the machine tool In case of change, adjust the difference between the inner diameter d2 of the thrust ball bearing race 4 and the diameter d1 of the main shaft 1 to 0.5 mm, put the bearing race 4 close to the machine tool box 5, and close the steel ball assembly 3 The bearing race 4, the main shaft 1 and the bearing shaft ring 2 are interference-fitted and then pressed against the steel ball assembly 3, and the bearing can be operated after an axial preload is applied to the bearing. Utilizing the bearing structure of the present invention, in th...

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Abstract

The invention relates to a thrust sphere bearing used in a machine tool spindle, which mainly comprises a spindle (1), a bearing shaft washer (2), a steel ball module (3), a bearing race (4), and a machine tool case (5); the bearing is characterized in that a clearance between an internal diameter d2 of the bearing race (4) and a diameter d1 of the spindle (1) is 0.4-0.6mm, with the optimal length of 0.5mm. The bearing has the beneficial effect that concentricity can be kept for two collars of the bearing in the process of assembling the spindle, thus prolonging the service life of the spindle bearing.

Description

technical field [0001] The invention belongs to the technical field of bearing product development, and relates to a thrust ball bearing for improving the service life of a machine tool spindle. Background technique [0002] At present, the overall dimensions of the thrust ball bearings used in domestic machine tool spindles are selected according to the national standard "GB / T301 Rolling Bearing Thrust Ball Bearing Outline Dimensions". If such a structure is used in the case of a horizontal spindle and the outer ring is not fitted, during the assembly process of the spindle, due to the large gap between the inner diameter of the seat ring and the spindle (generally, there is a gap of several millimeters), The seat ring freely sags to the position of the main shaft under the action of gravity, which will cause the raceways of the seat ring and the shaft ring to be out of concentricity, cause eccentric loading of the bearing, and reduce the service life of the bearing. Cont...

Claims

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Application Information

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IPC IPC(8): F16C19/12F16C33/58B23Q3/12
CPCF16C19/10
Inventor 张福有赵文爽刘本胜车世红周秀宽王洪军
Owner DALIAN KAITELE MACHINERY