Gearshift device for change-speed gearboxes of motor vehicles
A gearshift device for a change-speed gearbox of a motor vehicle, includes, but is not limited to a gearshift lever guided movably between positions corresponding to different gears, on which a locking member is displaceable between a locking position in a first degree of freedom in which it blocks any movement of the gearshift lever from a forward gear position into a reverse gear position, and a release position in a first degree of freedom in which it allows movement from the forward gear position into the reverse gear position. The locking member on the gearshift lever is movable in a second degree of freedom between a normal position in which movement between release position and locking position is possible and an alignment position in which it fixes the gearshift lever free from play.
1. A gearshift device for a change-speed gearbox of a motor vehicle, comprising:
a gearshift lever guided movably between a plurality of positions corresponding to a plurality of different gears; and
a locking member on the gearshift lever that is displaceable in a first degree of freedom,
wherein said locking member is movable in the first degree of freedom between a normal position allowing a shifting movement of the gearshift lever and an alignment position that substantially fixes the gearshift lever free from play,
wherein the locking member comprises a sleeve surrounding a shaft of the gearshift lever, a section guiding the sleeve in a rotationally fixed manner, and a section allowing a rotation of the sleeve about the shaft and the locking member is movable in a second degree of freedom between a locking position blocking the shifting movement of the gearshift lever from a forward gear position into a reverse gear position, and a release position allowing movement from the forward gear position into the reverse gear position.
2. The gearshift device according to claim 1 , wherein the first degree of freedom is a rotation about a shaft.
3. The gearshift device according to claim 1 , wherein the second degree of freedom of the locking member is a movement in a longitudinal direction of a shaft.
4. The gearshift device according to claim 1 , wherein the locking member and a shaft each have at least one contoured side surface, that in the normal position a plurality of contours of the contoured side surface intermesh in a complementary manner, and in the alignment position the plurality of contours intermesh in a noncomplementary manner.
5. The gearshift device according to claim 4 , wherein in the alignment position a projecting contour contacts a flat side surface.
6. The gearshift device according to claim 1 , wherein in a release position the sleeve is located on the section.
7. The gearshift device according to claim 1 , wherein a spring acts upon the sleeve along the shaft from the section allowing rotation in a direction of the section.
8. The gearshift device according to claim 1 , wherein a control element coupled to the sleeve is attached to a handle of the gearshift lever and that a freedom of movement of the control element is not sufficiently large to entrain the sleeve into the section allowing rotation.
9. The gearshift device according to claim 1 , wherein a latching device is provided, which can be engaged by a movement of the locking member from the section allowing rotation to the section to prevent return of the locking member to the section allowing rotation.