Miniature drive for automobile locks with running direction lock
AssigneeKiekert AG
InventorsUwe Reddmann, Milan Koubek, Manfred Janz
Life of this patent
Estimating the term…
Abstract
The invention relates to miniature drives for use in automobile locks. A return of the mechanism once the lock is opened and the motor is shut down is prevented completely mechanically. For this purpose, the worm wheel is associated with a mechanically active locking element which allows first to slightly turn back the wheel to unlock and reduce the load on the mechanism, but then prevents any further rotation against the direction of drive.
Claims16
A microdrive for the activation of motor vehicle latches, the microdrive comprising:
- a worm drive wheel and a motor, wherein the worm drive wheel is rotatable in a drive direction and an opposite direction,
- a clamping wheel coupled to the worm drive wheel such that the clamping wheel rotates with the worm drive wheel,
- a lock which resists the worm drive wheel from rotating in the opposite direction, wherein the lock is a mechanically effective locking part and the worm drive wheel is a locking part enabling slight rolling back in the opposite direction which prevents further rotation in the opposite direction, and
- a wrap spring encompassing the drive wheel and permitting a prescribed destressing of the gear, wherein the wrap spring comprises a hook component end protruding over the drive wheel which acts against a lock block causing slight friction on the drive wheel in the drive direction and is thus designed to press the coils of the wrap spring on the external edge of the drive wheel upon rolling back with the hook aperture defining a further lock block.
A microdrive for the activation of motor vehicle latches, the microdrive comprising:
- a worm drive wheel and a motor, wherein the worm drive wheel is rotatable in a drive direction and an opposite direction,
- a clamping wheel coupled to the worm drive wheel such that the clamping wheel rotates with the worm drive wheel,
- a lock which resists the worm drive wheel from rotating in the opposite direction, wherein the lock is a mechanically effective locking part and the worm drive wheel is a locking part enabling slight rolling back in the opposite direction which prevents further rotation in the opposite direction,
- wherein the worm drive wheel comprises a ring section that defines an interior and wherein the clamping wheel comprises a plurality of spring arms that rub against the interior and generate a braking force when the worm drive wheel rotates in the opposite direction.
A microdrive for the activation of motor vehicle latches, the microdrive comprising:
- a worm drive wheel and a motor, wherein the worm drive wheel is rotatable in a drive direction and an opposite direction,
- a clamping wheel coupled to the worm drive wheel such that the clamping wheel rotates with the worm drive wheel,
- a lock which resists the worm drive wheel from rotating in the opposite direction, wherein the lock is a mechanically effective locking part and the worm drive wheel is a locking part enabling slight rolling back in the opposite direction which prevents further rotation in the opposite direction,
- wherein the clamping wheel defines a pitch circle-shaped ring gap and wherein the drive wheel comprises a cam that is positioned in the pitch circle-shaped ring gap and wherein the pitch circle-shaped ring gap limits movement of the cam thereby limiting rotation of the drive wheel relative to the clamping wheel.
Dependencies are inferred from the claim text.