Title:
TRACTION DRIVE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO2000047915
Kind Code:
A3
Abstract:
A planetary traction drive transmission has an inner shaft (12, 14) provided with two inner raceways (22, 24) which are presented outwardly and taper downwardly away from each other and an outer ring (4) having two outer raceways (36, 38) which are presented inwardly, surround the inner raceways, and likewise taper downwardly away from each other. In addition, the transmission has tapered rollers (6, 8) arranged in two rows between the opposing inner and outer races. The rollers of each row are on apex and in line contact with the inner and outer raceways between which they are located. Moreover, they are arranged in pairs, with the rollers of each pair being generally aligned and backing each other. Indeed, at their large ends the rollers have conical end faces (42) and the rollers in each pair contact each other along those conical end faces, there being line contact here as well. In addition, the transmission has a roller carrier (10) provided with axles (58, 64) which extend into the rollers, so that the rollers revolve about and are maintained in position by the axles. Pure rolling contact characterized by the absence of spinning exists between the rollers and the raceways and also between the large end faces of corresponding rollers in the two rows.
Inventors:
AI XIAOLAN
RYBKOSKI THOMAS J
RYBKOSKI THOMAS J
Application Number:
PCT/US2000/003287
Publication Date:
November 02, 2000
Filing Date:
February 09, 2000
Export Citation:
Assignee:
TIMKEN CO (US)
International Classes:
F16H13/08; F16H13/10; (IPC1-7): F16H13/08
Foreign References:
| DE496772C | 1930-04-26 | |||
| FR1331018A | 1963-06-28 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 003, no. 065 (M - 061) 6 June 1979 (1979-06-06)
PATENT ABSTRACTS OF JAPAN vol. 003, no. 035 (M - 053) 24 March 1979 (1979-03-24)
PATENT ABSTRACTS OF JAPAN vol. 003, no. 035 (M - 053) 24 March 1979 (1979-03-24)
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