Patent ID: 8882630
Filing Date: 2014-11-11
Classification: F16H

Abstract:
1. An automotive transmission, said transmission comprising: i. a housing; ii. supported within said housing, an input shaft and an output shaft, said input shaft driven by a power source; iii. slidably mounted on said input shaft, a front drive dog ring; iv. slidably mounted on said input shaft, a rear drive dog ring; v. a gear housing, and contained in said gear housing, two planetary gear sets and carriers, said planetary gear sets comprising a central common sun gear rotatably mounted on said input shaft, two planetary sets and at least three planet gears per set surrounding said sun gear, said planetary gear sets and carriers being covered by circumferential ring gears having internal surface gears that mesh with said planet gears; vi. said planetary gears being activated by a front dog ring and a hydraulically driven control cylinder that applies a band on a clutch drum; vii. said planetary gear sets movement wherein one planetary gear set runs clockwise and said other planetary gear set runs counter clockwise, simultaneously, when, said clutch is applied and said front dog ring is engaged; viii. said front drive dog ring engages one planetary sun gear to drive said planetary gear sets; said front dog ring is driven by said input shaft; said front dog ring disengages when direct drive is selected bypassing said planetary gear sets; ix. said rear dog ring is surmounted on said output shaft and further drives said output shaft; said rear dog ring is activated by a shift lever selecting low gear position, reverse gear position, neutral position and direct drive position; when said direct drive position is selected said rear dog ring is disengaged from said planetary gear sets; x. a shift rod, said shift rod comprised of an inner shaft having a middle portion and an outer shell, said shift rod having a distal end and a near end, xi. said shift rod outer shell rod being spring biased; xii. said shift rod outer shell having first shift fork assembly mounted at said distal end of said shift rod, the shift fork of said first shift fork assembly being engaged to the forward dog ring; xiii. said shift rod inner shaft having mounted at said rear dog ring, a second shift fork assembly, said shift fork of said second shift fork assembly being engaged to said rearward dog ring; a fork of said second shift fork assembly being slidably mounted on said outer shift rod.