| 摘要 |
A gear change (1) for an automobile vehicle comprising an outer box (4), an input shaft (10) and a driven shaft (12) coaxial with one another, and at least one countershaft (11) that can be angularly coupled with the input shaft (10) and with the driven shaft (12) by means of a plurality of pairs of gears (21) in order to define a plurality of transmission ratios (M1 - M6, R1, R2) between the input shaft (10) and the driven shaft (12); the input shaft (10) and the driven shaft (12) are borne via bearings (14, 16) by respective walls (5, 9) of the box (4) in the vicinity of respective first end portions (13, 15) opposite one another and comprise respective second portions (17a, 19) mounted one inside the other and mutually supporting one another via a pair of axially spaced bearings (20). <IMAGE> |
