Patent ID: 6612960
Filing Date: 2003-09-02
Classification: F16H,Y10T

Abstract:
A vehicle transmission (6, 60) comprising a countershaft transmission having:one input shaft (32, 64), one main shaft (38, 66), one countershaft 46, 86), and one output shaft (112); wherein the main shaft (38, 66) has a plurality of loose gear wheels (68, 70, 72, 74) and a plurality of fixed gear wheels (76, 78, 80) mounted thereon; the countershaft (46, 86) has a plurality of loose gear wheels (96, 98) and a plurality of fixed gear wheels (88, 90, 92, 94) mounted thereon; each of the input shaft, main shaft, countershaft and output shaft is rotatably mounted around an axis of rotation (114, 116); an output shaft output gear wheel (110, 111, 128) is non-rotatably mounted upon the output shaft (112) and is driven by a countershaft output gear wheel (108, 130) non-rotationally mounted on the countershaft (86); the output shaft output gear wheel (110, 111, 128) and the countershaft output gear wheel (108, 130) together form a constant output gear wheel pair; the input shaft (64) of the transmission (60) is non-rotationally connected with the main shaft(66); the input shaft axis of rotation (116) and the main shaft axis of rotation (116) are coincident with one another; the output shaft axis of rotation (114) is spaced from the main shaft axis of rotation (116) and a spacing distance (118) between the main shaft and output shaft axes of rotation (114, 116) is determined by a reduction ratio of the constant output gear wheel pair (108-110, 108-111, 130-128); and the constant output gear wheel pair (108-110, 108-111, 130-128) is accommodated within a separate transmission housing (106) to facilitate replacement of the constant output gear wheel pair (108-110, 108-111, 130-128).