End cap type ball screw

Details End cap type ball screw End cap type ball screw

1993-11-23

1996-02-20

Bonck, Rodney H.

Machine element or mechanism

Gearing

Teeth

744248R, F16H 2522

Patent

active

054920361

ABSTRACT:
It is an object of the invention to provide a ball screw of an end cap type which provides low noise, is hard to break and is inexpensive by combining a soft material easy to form and a reinforcing member having high rigidity and density to thereby form a ball circulation member. A ball circulation member formed of a soft material such as synthetic resin permitting formation of a complicated shape is covered from the outside thereof with a reinforcing member formed of metal or the like having higher rigidity and density than the soft material of the ball circulation member. Use of the reinforcing member can restrict the vibration of an elastic deformation mode involved with the circulation of balls and at the same time a sound insulation operation due to the increased mass effect of the end cap is increased to thereby be able to reduce noises. Also, the strength of the whole of the ball circulation member is increased and thus the ball circulation member is made hard to break. Further, the ball circulation member and reinforcing member can also be formed integrally and thus they can be mass produced at low costs.

REFERENCES:
patent: 3244022 (1966-04-01), Wysong, Jr.
patent: 3643521 (1972-02-01), Nilsson
patent: 4557156 (1985-12-01), Teramachi
patent: 4604911 (1986-08-01), Teramachi
patent: 4677869 (1987-07-01), Mayfield
patent: 4795172 (1989-01-01), Brande
patent: 4939946 (1990-07-01), Teramachi
patent: 5154091 (1992-10-01), Bianco
patent: 5193409 (1993-03-01), Babinski

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