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Power steering with an elastically mounted recirculating ball spindle gear

A technology of screw drive and ball screw, applied in the field of servo steering gear, can solve the problems of insufficient service life, complex structure, large axial clearance, etc., and achieve the effect of long service life and simple structure

Inactive Publication Date: 2008-04-09
ZF LENKSYSTEME GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this purpose, radial ball bearings and four-point bearings are generally known from the prior art, wherein although the radial ball bearings have good pivoting properties, they have a large axial play, conventional four-point bearings have a small Bearing clearance, but poor swing behavior, softly supported four-point bearings are also known (e.g. via spring elements), but they are structurally complex and have other undesired side effects
[0006] Especially if the element to be supported is the ball nut of the ball nut spindle drive of the steering system, which is above all suitable for high axial forces, then high tie rod forces occur when driving, which can cause the spindle to be significantly Bending, transverse forces and moments cause uneven load distribution and additional loading of components (ball nuts, spindles, balls) in the drive unit
If these loads are impermissibly high, then the required life cannot be achieved

Method used

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  • Power steering with an elastically mounted recirculating ball spindle gear
  • Power steering with an elastically mounted recirculating ball spindle gear
  • Power steering with an elastically mounted recirculating ball spindle gear

Examples

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Embodiment Construction

[0030] The figures show the means for rotatably mounting the extension element 1 in the steering gear.

[0031] The device according to the invention is preferably suitable for rotatably mounting elements of a steering gear. To this end, FIG. 1 shows a preferred embodiment in which the element is a ball nut 1 or steering nut 1 of a recirculating ball screw drive of a steering system. The operating principle of a recirculating ball screw drive has long been known from the general prior art, see for example DE 103 10 492 A1 for this. FIG. 1 shows a drive unit 2 , which drives a ball nut 1 via a belt 3 . This results in a linear or axial movement of the spindle 4 , which deflects the vehicle wheels (not shown in detail) via the tie rod 5 . The ball nut 1 is rotatably supported by a bearing 6 , wherein the bearing 6 can perform a pivoting movement depending on the direction of action of disturbance forces (mainly caused by tie rod forces).

[0032] 1 schematically shows the str...

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Abstract

A power steering system with a circulating ball spindle mechanism, an extending element of the circulating ball spindle mechanism being support rotatably over a bearing and the bearing of the element making possible a swiveling motion corresponding to the direction of action of interfering forces.

Description

technical field [0001] The invention relates to a servo steering with a ball recirculating spindle drive having the features of the preamble of claim 1 . Background technique [0002] A servo steering gear of this type is known from DE 103 10 492 A1. [0003] This category describes a steering drive consisting of a belt and a pulley. Wherein the motor output shaft and the push rod are equipped with a pulley respectively, and they are connected to each other by means of a belt. The push rod constitutes a part of a ball nut screw drive unit, which furthermore includes an eccentric ring, a ball nut or steering nut, a bearing and a pulley. The push rod and ball nut basically constitute a ball screw. The ball nut is supported in the steering gear housing by bearings. [0004] The eccentric ring makes it possible to vary the shaft distance between the motor output shaft and the push rod, thus enabling preload-free installation of belts and pulleys. [0005] It is important he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04
CPCF16C19/166F16C23/08F16C23/10B62D5/0448F16H2025/2445F16C27/04F16H25/24F16C2326/24
Inventor H·巴赖斯M·布达克M·于施克R·温特O·黑策尔M·豪克
Owner ZF LENKSYSTEME GMBH
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