Machine element or mechanism – Mechanical movements – Grip units and features
Patent
1990-05-30
1991-05-28
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Grip units and features
74190, F16H 1500
Patent
active
050184008
ABSTRACT:
A continuously variable traction drive speed changer comprising a main frame (50) and a pair of rolling wheel assemblies (40a, 40b). Each rolling wheel assembly (40a, 40b) includes a coupling wheel (20) which is a bevel gear, a rolling wheel (10) having a bevel gear (12) meshing with the coupling wheel and a pivot shaft member (30) rotatably supporting the coupling wheel and the rolling wheel. The rolling wheel has an outer circumferential surface defined by a rotated involute curve, and the pivot shaft member is rotatably supported from the main frame (50) with respect to the circumferential direction of the coupling wheel. The rolling wheel assemblies (40a, 40b) are mounted in parallel to each other to the main frame (50) in such an arrangement that axes of the coupling wheels (20) are parallel to each other, and axes of the rolling wheels (10) are in a plane containing the axes of the coupling wheels (20) and perpendicular to the axes of the coupling wheels (20), and that the rolling wheels (10) are in contact with each other at outer circumferences. The speed changer also comprises an input shaft (60a) connected to the coupling wheel of one of the rolling wheel assemblies, an output shaft (60b) connected to the coupling wheel of the other of the rolling wheel assemblies, and a contact pressure applying member (80a) biasing the axes of the rolling wheels for rotating the pivot shaft members in the circumferential direction of the coupling wheel toward respective contact portions.
REFERENCES:
patent: 4726244 (1988-02-01), de Pencier
patent: 4738164 (1988-04-01), Kaneyuki
patent: 4751854 (1988-06-01), Sakai et al.
"Traction Drives Roll Up Impressive Gains", Machine Design, 1985, pp. 68-75.
Herrmann Allan D.
Laub David W.
Mitsubishi Denki & Kabushiki Kaisha
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