Continuously variable transmission and method of transferring loads in the same
First Claim
1. A method of assembling a variable speed transmission, said method comprising assembling at least one adjustable input pulley to an input shaft, assembling at least one adjustable output pulley to an output shaft, applying a vacuum to said input shaft to open said input pulley and applying a vacuum to said output shaft to open said output pulley, positioning belts over said input pulley and said output pulley, securing said input shaft and said output shaft in a transmission case, and releasing said vacuum.
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Abstract
Various configurations of a continuously variable transmission include a drive pulley, a driven pulley and a belt extending therebetween. The drive pulley is generally comprised of a moveable sheave half and a fixed sheave half. The moveable sheave half is freely rotatable relative to the drive shaft and the fixed sheave half. Torque is transferred between the moveable sheave half and the stationary sheave half through the use of a roller bearing and channel race arrangement; however, the roller bearings are freely translatable within the channel races. The continuously variable transmission also features a differential positioned between the two output pulleys and an articulating member positioned between the two input pulleys. These two members operate together to eliminate bucking of the belts caused by differences in driven speeds of the two driven pulleys in a parallel configuration of the variable speed transmission. Additionally, a method of assembling the transmission is also described.
74 Citations
7 Claims
- 1. A method of assembling a variable speed transmission, said method comprising assembling at least one adjustable input pulley to an input shaft, assembling at least one adjustable output pulley to an output shaft, applying a vacuum to said input shaft to open said input pulley and applying a vacuum to said output shaft to open said output pulley, positioning belts over said input pulley and said output pulley, securing said input shaft and said output shaft in a transmission case, and releasing said vacuum.
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7. A variable speed transmission comprising an input shaft supporting two input pulleys and an output shaft supporting two output pulleys, said two input pulleys each comprising a fixed input sheave half and a moveable input sheave half, an effective diameter of each of said input pulleys being adjustable by axial movement of said moveable input sheave half relative to said fixed input sheave half, said moveable input sheave halves being controlled by a set of corresponding hydraulic cylinders, said fixed sheave halves being interposed between said hydraulic cylinders and said moveable sheave halves and said moveable sheave halves being interposed between said hydraulic cylinders.
Specification