Cross roller bearing and coriolis gear device

Details Cross roller bearing and coriolis gear device Cross roller bearing and coriolis gear device

1997-12-17

1999-10-05

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

384551, 384570, 384571, 384619, F16C 1950, F16C 1940, F16C 3360

Patent

active

059612215

ABSTRACT:
A cross roller that may rotate at a high speed with high precision is provided. A first conical roller 7 for receiving loads in a first axial direction B and a radial direction and a second conical roller 8 for receiving loads in a second axial direction A and the radial direction are alternatively held by an inner race 3 and an outer race 4. Also, a predetermined space 9 is provided between large end faces 7b and 8b of the first and second conical rollers 7 and 8 and orbital surfaces 4a and 4b of the outer race 4. Then, a seat ring 10 that is elastically deformable is provided in the space 9. By using the conical rollers 7 and 8, a slippage between the orbital surfaces 3a, 3b, 4a and 4b and the rollers 7 and 8 is prevented. Also, the seat ring 10 is elastically deformed so that a suitable pre-pressure is applied to the first and second conical rollers 7 and 8 by its restoring force. Accordingly, it is possible to always impart a suitable pre-pressure to the conical rollers 7 and 8 to thereby perform the rotational operation at a high speed with high precision. (FIG. 1)

REFERENCES:
patent: 2040741 (1936-05-01), Hoke
patent: 2734786 (1956-02-01), McNicoll
patent: 4023869 (1977-05-01), Caldwell
patent: 4746232 (1988-05-01), Gugel
patent: 4915513 (1990-04-01), Orain
patent: 4974972 (1990-12-01), Boosler, Jr. et al.

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