JPH0483881U

JPH0483881U -

Info

Publication number: JPH0483881U
Application number: JP12581390U
Authority: JP
Priority date: 1990-11-28
Filing date: 1990-11-28
Publication date: 1992-07-21

Description

[Brief explanation of drawings]

第１図は、ソレノイドと一体的に設けられたプ
ランジヤ及びプランジヤと接触する突起の関係を
示す全体図であり、第２図は、ステアリングシヤ
フトに設けられたロータリーエンコーダ等から成
る操舵角検出手段を示す全体図である。第３図ａ
は、ソレノイドに流す励磁電流の変化の状態を示
す図であり、第３図ｂは、上記励磁電流によるソ
レノイドの引上げ量（破線図示）及び上記引上げ
量によつて修正された後のプリロードの変化状態
を示す図である。第４図は、ウオーム・ナツト・
セクター方式ステアリングギヤ装置の縦断面図及
び当該装置における従来技術のプリロード機構を
示すものである。第５図は、従来の技術における
プリロード機構を示す断面図であり、第６図は、
従来のプリロード機構によつて得られるセンター
ずれの生じた状態を示すプリロード変化図である
。１……ソレノイド、１１……ソレノイドコイル
、１２……コア、２……プランジヤ、３……バネ
、４……ギヤハウジング、５……パワーピストン
（ナツト）、５１……突起、６……操舵角検出手
段、７……ステアリングシヤフト、８……励磁電
流制御手段、９……ウオーム、１０……セクタ、
１１……ギヤ噛合い部。 FIG. 1 is an overall view showing the relationship between the plunger provided integrally with the solenoid and the protrusion that contacts the plunger, and FIG. FIG. Figure 3a
3 is a diagram showing the state of change in the excitation current flowing through the solenoid, and FIG. It is a figure showing a state. Figure 4 shows Worm Nut.
1 is a longitudinal sectional view of a sector type steering gear device and a prior art preload mechanism in the device; FIG. FIG. 5 is a sectional view showing a preload mechanism in the prior art, and FIG.
FIG. 6 is a preload change diagram showing a state in which a center shift occurs, which is obtained by a conventional preload mechanism. 1... Solenoid, 11... Solenoid coil, 12... Core, 2... Plunger, 3... Spring, 4... Gear housing, 5... Power piston (nut), 51... Protrusion, 6... Steering Angle detection means, 7... Steering shaft, 8... Excitation current control means, 9... Worm, 10... Sector,
11...Gear meshing part.

Claims

[Scope of utility model registration request]

In a steering gear device, a power piston having a rack that engages with a sector or a pinion is provided with a chevron-shaped protrusion, a plunger is provided in a part of the gear housing, and the plunger applies a spring force to a surface of the power piston having the protrusion. At the same time, a solenoid is provided in series with the plunger, and a steering detection means for detecting the steering angle is further provided, and the excitation current to the solenoid is controlled based on the data from the steering angle detection means by the pushing force of the plunger. A preload mechanism is provided with an excitation current control means for controlling the steering so that the steering operation is symmetrical with respect to the neutral position of the steering operation in a right-hand turning operation and a left-hand turning operation.