| 摘要 |
<p>A variable ratio transmission comprises a stationary housing (16) with a variable diameter internal surface (80) and an input (35, 41) and output shaft (31) journalled in the housing for rotation about a common axis co-axial with the variable diameter internal surface of the housing. A floating eccentric (43) mounted on the input shaft (35, 41) has an external cylindrical surface (44) with the eccentricity of that cylindrical surface with respect to the input shaft being variable between approximate co-axiality with the input shaft to a maximum preset eccentricity. A driven member (48) supported co-axially on the floating eccentric has an external cylindrical surface (52) in rolling engagement with the internal of the variable diameter internal surface (80) and coupled to the output shaft. The rotational speed ratio between the input and output shaft is varied by varying the diameter of the internal cylindrical surface (80) of the housing and correspondingly varying the degree of eccentricity of the floating eccentric (43) to the input shaft (35, 41).</p> |
