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Rack for a rack-and-pinion steering system of a motor vehicle

A rack type, steering gear technology, applied in the direction of mechanical steering gear, steering gear, steering mechanism, etc.

Inactive Publication Date: 2015-07-08
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to structural limitations, the steering angle of the steered wheels is limited by the adjustment path of the rack along its rack axis

Method used

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  • Rack for a rack-and-pinion steering system of a motor vehicle
  • Rack for a rack-and-pinion steering system of a motor vehicle
  • Rack for a rack-and-pinion steering system of a motor vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to understand the present invention better, at first combine self known rack type steering gear (as Figure 6 and Figure 7 Schematically shown like that) illustrates the problem that the rack 1 is connected at its axial ends to the tie rod 3 via a tie rod hinge 2 , and the tie rods are connected at their ends facing away from each other via a steering arm hinge 4 is connected to a steering arm 5 which acts on a not further shown wheel carrier in order to steer the steering wheel 6 . From Figure 6 It can be seen that the axes of action of these steering arms 5 intersect each other at a point of intersection M which lies on the axis of rotation of the non-steered rear wheels of the vehicle. In this view, the point of intersection M is shown displaced. Such a configuration of the steering arm 5 can be the main prerequisite for fulfilling the so-called Ackermann condition as described at the outset.

[0033] At the neutral position of the rack steering gear (...

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PUM

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Abstract

The invention relates to a rack (7, 31) for a rack-and-pinion steering system of a motor vehicle, having a variable toothing (12, 13) formed from a plurality of teeth (14, 15) arranged along a rack axis for the engagement of a pinion (18, 17, 43, 44), wherein the rack (7, 31) is formed by two rack parts (8, 9, 32, 33) that are arranged movably with respect to one another and which both have an identical variable toothing (14, 15) for the engagement of a respective pinion (16, 17, 43, 44).

Description

technical field [0001] The invention relates to a rack for a rack-type steering gear of a motor vehicle and a rack-type steering gear having such a rack. Background technique [0002] A toothed rack with variable pitch is known, for example, from DE 69 607 549 T2. The effective tooth width of the individual rack teeth of the region with variable tooth pitch gradually increases or decreases in width, in particular, from the middle position of the rack tooth row towards the end region of the rack tooth row . Since the effective tooth width is narrowed, the contact position of the rack teeth and the helical pinion is adjusted toward the middle of the tooth width. [0003] Gear racks with a variable tooth pitch are used, for example, in rack steering gears of motor vehicles, wherein the steering feel is to be improved. The steering ratio between the steering wheel angle and the average steering angle of a pair of steered wheels can be progressively designed with the help of a...

Claims

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Application Information

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IPC IPC(8): B62D3/12F16H55/26
CPCB62D7/09B62D3/12F16H55/26B62D3/126F16H19/04Y10T74/18576Y10T74/1956F16H25/20
Inventor 托比亚斯·沃格勒
Owner SCHAEFFLER TECH AG & CO KG
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