Small high-speed constant-pressure prepressing apparatus of main bearing
A high-speed spindle, constant pressure preload technology, applied in the direction of metal processing equipment, etc., can solve the problems that affect the stiffness and fatigue life of the shaft system, affect the stiffness, load capacity and high speed of the machine tool spindle system, and affect the fit clearance. Large sliding contact area, high support rigidity, and the effect of avoiding jamming
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0018] As shown in Fig. 1, Fig. 2 and Fig. 3, the present invention includes a first bearing 1 and a second bearing 11 placed in the holes at both ends of the shaft sleeve 10, the main shaft 8 is contained in the first bearing 1 and the second bearing 11, A shaft end nut 12 positions the main shaft 8 and the second bearing 11 in the sleeve 10 . There is also a bushing 9 inside the bushing 10, the outer edge of one end of the bushing 9 is stuck in the stepped hole of the bushing 10 and pressed and positioned by the outer ring of the second bearing 11, the other end of the bushing 9 is equipped with a spring seat 4, The spring 5 is placed in the spring seat 4, one end of the spring seat 4 is against the spring retaining ring 6 and the elastic retaining ring 7, the elastic retaining ring 7 is embedded in the sliding sleeve 2, and the sliding sleev...
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