LONGITUDINAL SEAT ADJUSTMENT DEVICE

• US 20070096494A1
• Filed: 12/08/2006
• Published: 05/03/2007
• Est. Priority Date: 03/05/2001
• Status: Active Grant

• Current Assignee: IMS Gear SE & Co. KGaA
• Original Assignee: IMS Gear GmbH
• Inventors: Wohrle, Michael, Probst, Frank, Krimmel, Fred, Hofschulte, Wolfram-Heinrich
• Granted Patent: US 7,484,787 B2
• Time in Patent Office: Days
• US Class Current: 296/65.01
• CPC Class Codes: B60N 2/02246 Electric motors therefor
• CPC Class Codes: B60N 2/067 by linear actuators, e.g. linear screw mechanisms
• CPC Class Codes: B60N 2/0705 omega-shaped

Abstract

The invention relates to a longitudinal seat adjustment device comprising an upper rail and a lower rail. The upper rail sits in the lower rail. Between the two rails a spindle is fixedly connected to the lower rail. Drivable on said spindle is a transmission, which can be retained in a specific manner by means of slotted bridges in the case of a crash.

Claims

1. A longitudinal seat adjustment device for use in a motor vehicle that includes a:

chassis, said device comprising;

a lower rail fixed to the chassis, inside the lower rail an upper rail attached to a seat can be propelled by a motor;

a spindle sitting inside the upper rail and having its respective ends fixed to the lower rail, on which spindle a transmission fixedly coupled to the upper rail is arranged in axially movable fashion, wherein there are recesses in opposite side walls of the upper rail into which a thrust ring, fixed to the spindle and sitting with its principal surface transverse to the longitudinal axis of the spindle, intrudes and is pressed against the side walls of the upper rail in the case of a crash.

3. The device of claim 1, wherein at least one of the wall parts of the upper rail has a notch through which a flexible shaft coupled to a drive motor is guided.

4. The device according to claim 1, wherein side walls of the upper rail wall parts/slotted bridges are pressed into the interior of the upper rail and in that the transmission housing brace itself against these slotted bridges.

2. A longitudinal seat adjustment device for use in a motor vehicle that includes a chassis, said adjustment device comprising:

a lower rail fixed to a chassis, inside which lower rail an upper rail to which a seat is attached can be propelled by motor, a spindle sitting inside the upper rail and having its respective ends fixed to the lower rail, on which spindle a transmission fixedly coupled to the upper rail is arranged in axially movable fashion, wherein the transmission is clampingly held in the upper rail and has a transmission housing whose opposite housing walls lie between wall parts of the upper rail and whose upper wall projects from the upper rail.

5. The device of claim 2, wherein the transmission housing comprises two plastic housing shells, which are connected to one another by ultrasonic welding.

6. The device of claim 2, wherein the clamping holding of the transmission by metal stirrups bent into an L-shape made oppositely in a recess in the upper rail, between which stirrups the transmission housing is slipped with wall tapers.

7. The device of claim 2, wherein the transmission has a spindle nut resting on the spindle with worm gear and a worm engaging with the worm gear.

8. The device of claim 7, comprising a thrust ring integrally molded onto the spindle nut.

9. The device of claim 8, wherein the spindle nut and the thrust ring are made of metal.

10. The device of claim 9, wherein the worm gear is coaxially applied to the spindle nut by plastic injection.