Ball screw device of ball-circulating-part embedded type

Details Ball screw device of ball-circulating-part embedded type Ball screw device of ball-circulating-part embedded type

1997-11-04

2000-07-25

Battista, Mary Ann

Machine element or mechanism

Gearing

Teeth

744248R, 74 8915, 403343, F16H 2522

Patent

active

060924349

ABSTRACT:
A ball screw device of a ball-circulating-part embedded type includes: a screw shaft having a helical thread groove on an outer peripheral surface thereof; a ball nut having a thread groove provided on an inner peripheral surface thereof in correspondence with the thread groove of the screw shaft, the screw shaft being loosely fitted in the inner peripheral surface of the ball nut; and a multiplicity of balls rotatably fitted between the two thread grooves and adapted to circulate while being guided by a ball-circulating part fitted in the ball nut
wherein the ball nut has a retaining recess on an outer peripheral surface thereof, wherein at least a portion of a fitted outward surface of the ball-circulating part is substantially flush with the outer peripheral surface of the ball nut in a vicinity of the fitted outward surface of the ball-circulating part, and wherein there is provided a circulating-part holding member for fixing the ball-circulating part to the ball nut by being fitted over the outer peripheral surface of the ball nut and covering the fitted outward surface of the ball-circulating part, the circulating-part holding member having a projection for engaging the retaining recess of the ball nut.

REFERENCES:
patent: 2339615 (1944-01-01), Castelli
patent: 3532004 (1970-10-01), Nilsson
patent: 3592072 (1971-07-01), Nilsson
patent: 4846011 (1989-07-01), Gaffney
patent: 5303607 (1994-04-01), Katahira
patent: 5711188 (1998-01-01), Miyaguchi et al.

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