Patent ID: 6422363
Filing Date: 2002-07-23
Classification: B60W,F16H

Abstract:
Vehicle gearbox, comprising:an input shaft (2) mounted in a housing (1a); at least one countershaft (3) driven by the input shaft (2); a main shaft (4), pairwise inter-engaging gears (7, 12, 8, 13, 9, 14) supported by the countershaft and the main shaft, at least one gear (12, 13, 14) in each pair being freely rotatably mounted on its shaft and lockable to said shaft by means of an engaging sleeve (15, 16) axially displaceably but non-rotatably mounted on said shaft, said engaging sleeve being coordinated with synchronizing arrangements; a shift control (21), the movement of which in one direction from a neutral position effects via motion transmitting elements (17, 18, 22, 23), displacement of an engaging sleeve (15) to an engagement position, and the movement of which from the neutral position in another direction effects displacement of another engaging sleeve (16) to an engagement position; and lock means (40) comprising a lock element (44) with control means (45, 46), which, during predetermined operating conditions, hold the lock element in a locked position, in which it impedes movement of the shift control; wherein the control means (45, 46) of the lock element (44) comprise means (49) which are affected by the position of a clutch pedal (61) and which hold the lock element in the locked position when the clutch pedal is not actuated, characterized by means (42, 43) which moves the lock element (44) out of the locked position when the shift control (21) is loaded with a predetermined force.