AUTOMATIC GEARBOX Russian patent published in 1996 - IPC

FIELD: automotive industry; vehicle automatic transmissions. SUBSTANCE: gearbox has input shaft, planetary reduction gear, reversing mechanism, countershaft, differential with rollers, output shaft, shaft speed regulator and hydraulic cylinder. Mounted on one end of countershaft are planet pinions rotating between sun gear mounted on planetary reduction gear carrier connected with one brake pulley, and crown wheel installed on crown gear of planetary reduction gear connected with second brake pulley. Two brake pulleys engage with gearbox case through brakes. Differential driving gear secured on other end of countershaft rotates planet pinions. Second central gear wheel is secured on gearbox fixed case. Roller moves along diameter of face surface of differential planet pinion and engages with pinion. Roller conveys rotation to wheel through gear with splined shaft hinge-mounted on freely carrying carrier. Driven wheel is rigidly mounted on output shaft. Used in gearbox is device to automatically control movement of rollers along diameters of differential planet pinions depending on shaft speed. Corrector is installed in shaft speed regulator for movement along regulator axis. Corrector is used to change shaft rpms at which regulator spool closes holes of two pipes connected with hydraulic cylinder. Travel of corrector is adjusted by screw or flexible shaft. Mounted between hand oil distributor intended to control vehicle motion and brake cylinders is foot-operated by-pass switch to unlock and lock brake pulleys. EFFECT: enhanced reliability of operation. 5 cl, 10 dwg