The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1991
Filed:
May. 30, 1990
Akira Takami, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
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.