Patent ID: 8091447
Filing Date: 2012-01-10
Classification: F16H,Y10T

Abstract:
1. A sequential control device for engaging gears in a mechanical gearbox of a motor vehicle, the device comprising: at least one drum mounted rotatably about an axis of rotation and having a plurality of guide grooves on an outer surface of the drum; a corresponding plurality of engagement forks, each including a supporting portion supported slidably on the outer surface of the drum, a drive portion configured to drive a corresponding synchronizing sleeve of the gearbox, and a pin engaging in a corresponding one of the plurality of guide grooves of the drum; wherein the guide grooves are shaped so as to produce, as a result of the rotation of the drum, a selective movement of the pins, together with the corresponding engagement forks, parallel to the axis of rotation of the drum according to predetermined operating modes, to cause each time the engagement of a given gear, wherein the pins are positioned, with respect to the axis of rotation of the drum, on the same side of the drive portion of the engagement forks; wherein a through groove is provided on the outer surface of the drum and extends parallel to the axis of rotation from an end of the drum to at least one of the plurality of guide grooves that is farthest from that end, so as to guide the pins of the engagement forks during mounting of the engagement forks on the drum.