Electricity: motive power systems – Positional servo systems – Limit or end-stop control
Patent
1999-07-16
2000-12-19
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
Limit or end-stop control
318653, 3242072, 32420725, B60J 7057, G01D 514
Patent
active
061631256
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a drive device for a part of a vehicle that can move between end positions and process for manfacturing it.
The document DE 10 24 373 C3 has already disclosed a drive device for a part that can move between end positions, such as a sunroof of a vehicle. This drive device has an electric motor, a step-down gear disposed after the electric motor, a cable roller that is coupled to the step-down gear and is for moving a cable leading to the sunroof. The device includes switching device that is drive connected to the cable drum by means of a gear pair, and a worm shaft, a worm gear that meshes with it, which has a switching finger and in this way, constitutes a switching gear, and has a first contact and a second contact that can be actuated by the switching finger. The switch contacts that can be actuated by the switching finger are used to shut off the electric motor when the sunroof reaches its structurally determined end positions. In this connection, the two gears, the worm, and the worm gear are embodied so that a movement of the sunroof between the structurally determined end positions essentially results in one third of a rotation of the worm gear. One of the end switches is disposed mounted in a fixed fashion in the switching device, whereas the other end position switch can be adjusted in order to adapt to the movement path of the sunroof. In this way, the drive device can be adjusted after its manufacture and can be installed in a vehicle in the adjusted state.
The U.S. Pat. No. 4,468,063 has disclosed another drive device for a sunroof. This includes an electric motor, a worm gear pair, a safety coupling on the worm gear pair, a gear shaft, and a first gear device can be driven by the gear shaft in order to drive a pinion that is engaged by drive wires of the sunroof, and a second gear device for driving a switch device. The second gear device is embodied here as a so-called cam toothed gear pair and supports a switching gear with cams. The first gear device and the second gear device are embodied in such a way that when the sunroof moves between its two end positions, the switching gear executes less than one rotation. The switching gear has two cams spaced axially apart, each of which is associated with a micro-switch. The Patent Disclosure discloses the fact that the drive device can be pre-assembled and exactly adjusted before being installed in a vehicle.
The Patent Disclosure EP 0 469 286 B1 has disclosed another drive device whose switching gear can have, for example, two cams and two switches associated with them. Alternatively, the Patent Disclosure also discloses the fact that in lieu of cams, permanent magnets can be fastened to the switching gear and that these permanent magnets are then associated with sensors that are sensitive to magnetic fields, such as Hall sensors.
There are other drive devices with electric motors, worm gear pairs, and control devices for moving windshield wipers between two end positions. Switching gears for actuating contacts and also cranks that engage wiper arms via connecting rods are then rigidly connected to the shafts of worm gears. By means of the U.S. Pat. No. 4,866,357 in a drive device for a windshield wiper, it is known, instead of mechanically actuated contacts, to use optical sensors that function without contact for the purpose of switching an electric motor alternatingly in two rotation directions depending on the selected size of a wiping field and to vary the wiping speed between the switching events according to a pre-selected time plan. Depending on a respective pivoting angle of a wiper arm, the optical sensors receive light signals that are controlled by a code disk. A code disk of this kind is equipped in this instance with a Gray code, so it needs a number of code tracks and requires a relatively complex evaluation circuit which is connected to the optical sensors, as well as a regulating circuit that compares evaluation results with set point values that can be read from a program memory, and controls
REFERENCES:
patent: 4468063 (1984-08-01), Yukimoto et al.
patent: 4866357 (1989-09-01), Miller et al.
patent: 5528139 (1996-06-01), Oudet et al.
patent: 5705755 (1998-01-01), Yamamura
patent: 5791204 (1998-08-01), Torii et al.
patent: 5875588 (1999-03-01), Torii et al.
patent: 5924324 (1999-07-01), Kilker et al.
patent: 6051899 (2000-04-01), Walther et al.
Baumann Rolf
Bernauer Christof
Braun Peter
Greigg Edwin E.
Greigg Ronald E.
Ro Bentsu
Robert & Bosch GmbH
LandOfFree
Drive device for a movable part that can be displaced between en does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive device for a movable part that can be displaced between en, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive device for a movable part that can be displaced between en will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-273527