Bearings – Linear bearing – Recirculating
Patent
1989-09-26
1990-12-04
Hannon, Thomas R.
Bearings
Linear bearing
Recirculating
384 43, F16C 2906
Patent
active
049749714
ABSTRACT:
An endless rolling contact linear motion guide assembly includes a rail extending straight over a predetermined length, a slider movably mounted on the rail and a plurality of rolling members for providing a rolling contact between the rail and the slider. The slider is provided with an endless circulating path having a load path section, a return path section and a pair of curved connecting path sections, each connecting the corresponding ends of the load and return path sections. The rail is formed with an inner guide groove and the slider is formed with an outer guide groove located opposite to the inner guide groove so that a combination of the inner and outer guide grooves defines the load path section. The outer guide groove has a Gothic arch shape having a pair of upper and lower curved surfaces, each of which is in contact with the rolling member at one contact point. A contact angle defined between a vertical line passing through the center of the rolling member and a straight line passing through the center of the rolling member and a contact point between the rolling member and each of the upper and lower curved surfaces of the outer guide groove is set at an angle larger than 45.degree. and preferably approximately at 50.degree..
REFERENCES:
patent: 3398999 (1968-08-01), Halvorsen
patent: 3934946 (1976-01-01), Burr et al.
patent: 4433876 (1984-02-01), Mottate
patent: 4616886 (1986-10-01), Teramachi
patent: 4799803 (1989-01-01), Tanaka
Hannon Thomas R.
Nippon Thompson Co. Ltd.
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