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Ball screw drive of an electromechanical servo-assisted power steering system having integrated angular ball bearing and compensation for differing thermal expansion

An electromechanical servo and auxiliary power technology, which is applied in the transmission device, electric steering mechanism, power steering mechanism, etc., can solve problems such as inability to perform proper thermal compensation

Pending Publication Date: 2019-02-05
THYSSENKRUPP PRESTA AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the disadvantage is that proper thermal compensation cannot be done

Method used

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  • Ball screw drive of an electromechanical servo-assisted power steering system having integrated angular ball bearing and compensation for differing thermal expansion
  • Ball screw drive of an electromechanical servo-assisted power steering system having integrated angular ball bearing and compensation for differing thermal expansion
  • Ball screw drive of an electromechanical servo-assisted power steering system having integrated angular ball bearing and compensation for differing thermal expansion

Examples

Experimental program
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Effect test

Embodiment Construction

[0022] figure 1 The electromechanical motor vehicle steering system 1 is schematically shown with a steering wheel 2 coupled to the upper steering shaft 3 and the lower steering shaft 4 in a non-rotating manner. The upper steering shaft 3 is functionally connected to the lower steering shaft 4 by means of a torsion bar. The lower steering shaft 4 is connected to the pinion gear 5 in a non-rotating manner. The pinion 5 meshes with the toothed section 6'of the toothed rack 6 in a known manner. The toothed rack 6 is supported in the steering gear housing so as to be displaceable in the direction of its longitudinal axis. The toothed rack 6 is connected to the pull rod 7 at the free end of the toothed rack by means of a ball joint not shown. In each case, the tie rod 7 itself is connected to the articulated wheel 8 of the motor vehicle in a known manner by means of axle members. The rotation of the steering wheel 2 causes the longitudinal displacement of the toothed rack 6 via t...

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PUM

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Abstract

The invention relates to an electromechanical servo-assisted power steering system (1), in particular for a motor vehicle, having a servo motor (9), which drives an axially displaceable component (6)via a ball nut (13), which is rotatably mounted in a bearing (15) in a housing (21), wherein the ball nut (13) engages with a threaded spindle (6') formed on the component (6), wherein the bearing (15) is a two-rowed angular ball bearing having at least one bearing inner ring (16) and at least one bearing outer ring (18), and wherein the at least one bearing outer ring (18) is accommodated in a sleeve (19), which is arranged in a bearing seat (20) of the housing (21).

Description

Technical field [0001] The present invention relates to an electromechanical servo-assisted power steering system having the features of the preamble of claim 1. Background technique [0002] In an electromechanical servo-assisted power steering system, torque is generated via an electric motor, the torque is transmitted to the gear mechanism and the torque is superimposed on the steering torque introduced by the driver at the position of the gear mechanism. [0003] The general electromechanical servo-assisted power steering system has a servo motor acting on the ball nut of the ball screw drive. The ball nut engages with a ball screw provided on the outer circumference of a rack with a toothed rack, which is a part of a rack-pinion steering system, via a rotating ball. The rotation of the ball nut causes an axial displacement of the toothed rack, thereby supporting the steering movement of the transmission. Preferably, the ball screw drive is coupled to the electric motor by me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04
CPCB62D5/0448B62D5/0403F16C19/547F16C2326/24F16H25/2204F16H25/24F16H2025/2081
Inventor 安德拉斯·伊莱什沃尔弗拉姆·赖瑟
Owner THYSSENKRUPP PRESTA AG
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