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Step down gear train, more specifically for an adjusting device of a motor vehicle seat

A reduction gear, car seat technology, applied in the direction of vehicle seats, transmissions, movable seats, etc.

Inactive Publication Date: 2008-11-12
C ROB HAMMERSTEIN GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem associated with this type of reduction gear train is to achieve manufacturing precision and zero backlash

Method used

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  • Step down gear train, more specifically for an adjusting device of a motor vehicle seat
  • Step down gear train, more specifically for an adjusting device of a motor vehicle seat
  • Step down gear train, more specifically for an adjusting device of a motor vehicle seat

Examples

Experimental program
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Embodiment Construction

[0018] The reduction gear ratios shown in the figures are particularly suitable and designed for adjusting devices for vehicle seats. For this purpose, a pinion 20 is provided, which is rotatably connected to an output shaft 22 . It normally meshes with a toothed rack of known adjustment means (not shown). Said rack is adjustable relative to the other part of the adjustment means which is connected to the housing of the reduction gear train, in this particular example by forming the housing part 26 into a flat plate of steel or similar material.

[0019] Housing part 26 abuts directly against pinion 20 and has a passage 28 for the output shaft. This channel will be described in detail below.

[0020] A first fixed gear with external toothing, which is connected to the housing part 26 , is arranged directly adjoining and at as little distance as possible from the housing part. It has a pair of bearing bores 32 centered on an output axis 34 forming the center of the output sh...

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PUM

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Abstract

A reduction gear train, precisely, it is used for an adjustment device of a car seat, the reduction gear train comprises: an output shaft (22) rotating around an output axis (34), an output shaft (22) connected to the output shaft (22) ) of the pinion (20), a housing comprising a housing portion (26) located directly adjacent to the pinion (20) and having a passage (28) for the output shaft (22), a second housing with an external gear A fixed gear is connected to the housing part (26) and includes a pair of bearing holes (32) centered on the output axis (34), a second gear with an external gear is connected to the pinion (20) and includes a suitable On the bearing protrusion (38) matching the bearing hole (32), a cam gear (39) with internal teeth meshing with the first and second gears (30, 36), said cam gear having A gear axis offset by an eccentric value e with respect to the output axis (34), the cam gear has a bearing hole (44), which is adapted to match the output shaft (22) and has the same axis as the output shaft (22) , and an input shaft (52) is in direct or indirect rotational communication with the cam gear (39).

Description

technical field [0001] The invention relates to a reduction gear train especially suitable for an automobile seat adjustment device. It is provided in a known manner with an output shaft which rotates about the output axis. A pinion is connected to the output shaft and usually meshes with a toothed part of the adjustment device, such as a sector gear. A housing houses the various gear portions, the housing having a housing portion located directly adjacent the pinion and having a passage for the output shaft. A first fixed gear having an external gear is connected to the housing portion. A second gear having an external gear is located directly next to the first gear. As is well known, the second gear has a number of teeth different from that of the first gear, at least one tooth being different from each other. A cam gear is provided having internal teeth which are in constant mesh with the first gear and the second gear. The cam gear oscillates around the output shaft, ...

Claims

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Application Information

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IPC IPC(8): B60N2/44B60N2/02F16H1/16B60N2/90F16H1/32F16H37/04
CPCF16H2001/2881B60N2/0232F16H37/041F16H1/16F16H1/32B60N2002/0236B60N2/02253B60N2/02246
Inventor B·拜克尔V·-T·候R·弗基尔
Owner C ROB HAMMERSTEIN GMBH & CO KG