| 摘要 |
A shift safety device for a manual transmission having a gear shift shaft that rotates to select shift gates and moves to shift gears. The device has a blocking element which, during selector motion towards a shift gate, is driven by the gear shift shaft, against a spring, from a starting position into a blocked position, in which the device blocks further selector motion of the gearshift shaft, and which, during subsequent shifting motion of the gearshift shaft, is released and returned back to the starting position, by the spring, thereby permitting further selector motion. A driver arm, disposed on the gear shift shaft, moves the blocking element tangential to the arc traversed during selector motion by the driver arm between the starting and blocking positions. The blocking element moves in the linear track traversed during shifting of the driver arm and is pretensioned toward the starting and center positions. |
| 主权项 |
1. A shift safety device (26) for a motor vehicle manual transmission comprising a gear shift shaft (28) that defines a longitudinal axis and is rotatable during selector motion for selecting shift gates and being axially movable during shifting motion for shifting gear steps, the shift safety device comprising:
a blocking element (38) has a contact contour (66), the blocking element which, during the selector motion of the gear shift shaft towards an adjacent shift gate, is moved by the gear shift shaft (28) using the contact contour (66) thereof against a force of a return spring out of a starting position into a blocked position, the blocking element in the blocked position blocks further selector motion of the gear shift shaft (28), and, during a subsequent shifting motion of the gear shift shaft (28), the blocking element is released and then returned by the return spring into the starting position thereof for permitting the further selector motion, a radially projecting driver arm (36) being disposed on the gear shift shaft (28), a free end (68) of the radially projecting driver arm (36) has a contact contour (72) that interacts with the contact contour (66) of the blocking element (38), the blocking element (38) is movably arranged within a supporting housing which is movably disposed in a surrounding structure (44) of the gear shift shaft (28) that is fixed to a further housing such that the blocking element is moved tangentially to an arcuate track that is traversed, during the selector motion, by the free end (68) of the radially projecting driver arm (36) to move the blocking element between the starting position thereof and the blocking position thereof, the blocking element in the starting position thereof protrudes from the supporting housing, the blocking element (38) being movably supported in a direction of a linear track traversed by the free end (68) of the radially projecting driver arm (36) during the shifting motion, parallel to the longitudinal axis (32) of the gear shift shaft (28), and the blocking element (38) being pretensioned, toward the starting position thereof, by the return spring and along the linear track, toward a center position, by centering spring means (62, 64). |
