JPS6414566U

JPS6414566U -

Info

Publication number: JPS6414566U
Application number: JP11030987U
Authority: JP
Priority date: 1987-07-18
Filing date: 1987-07-18
Publication date: 1989-01-25

Description

[Brief explanation of drawings]

第１図はこの発明を具体化したトルク検出装置
とその電気的構成を示す説明図、第２図は電磁石
と上部及び下部ドラムの配置状態を示す正面図、
第３図は同じく断面図、第４図は下部ドラムの平
面図、第５図ａ，ｂ，ｃは上部歯と下部歯の各相
対位置における磁束を示す図、第６図は上部歯と
下部歯の相対位置に対するパーミアンスの関係を
示す図である。図中、１は第一軸としてのインプツトシヤフト
、２は弾性カツプリングとしてのバネ継手、３は
第二軸としてのアウトプツトシヤフト、６は第１
の磁路形成ドラムとしての上部ドラム、７，９は
歯、８は第２の磁路形成ドラムとしての下部ドラ
ム、１０は磁気発生手段としての電磁石、１１は
フエライトコア、１２はコイル、１３は磁気検出
センサとしてのホール素子、１５はバツテリー、
１６はスイツチ手段としてのコンタクタ、１６ａ
は作動手段としてのコンタクタコイル、１７は駆
動手段としての直流モータ、１８はモータ駆動制
御回路、２１はキースイツチ、２２は定電流回路
としての定電流駆動回路である。 FIG. 1 is an explanatory diagram showing a torque detection device embodying the present invention and its electrical configuration; FIG. 2 is a front view showing the arrangement of the electromagnet and the upper and lower drums;
Fig. 3 is a cross-sectional view, Fig. 4 is a plan view of the lower drum, Fig. 5 a, b, and c are diagrams showing the magnetic flux at each relative position of the upper and lower teeth, and Fig. 6 is the upper and lower teeth. FIG. 3 is a diagram showing the relationship between permeance and relative position of teeth. In the figure, 1 is the input shaft as the first shaft, 2 is the spring joint as the elastic coupling, 3 is the output shaft as the second shaft, and 6 is the first shaft.
An upper drum as a magnetic path forming drum, 7 and 9 are teeth, 8 is a lower drum as a second magnetic path forming drum, 10 is an electromagnet as a magnetism generating means, 11 is a ferrite core, 12 is a coil, 13 is a A Hall element as a magnetic detection sensor, 15 a battery,
16 is a contactor as a switch means, 16a
17 is a DC motor as a driving means, 18 is a motor drive control circuit, 21 is a key switch, and 22 is a constant current drive circuit as a constant current circuit.

Claims

[Claims for Utility Model Registration] 1. A first shaft driven by a steering wheel, a second shaft connected to the first shaft via an elastic coupling, and a predetermined shaft fixed to the first shaft. a first magnetic path forming drum on which a tooth row with a predetermined interval is formed; a second magnetic path forming drum arranged to face the tooth row of the drum at a predetermined interval, and a magnetism generating means for forming a magnetic path in the first and second magnetic path forming drums; a magnetic detection sensor that detects a magnetic flux density in a predetermined magnetic path of a magnetic circuit formed by the magnetic circuit; In the torque detection device for power steering, the torque detection device detects a change in the magnetic field, and controls the drive of a second shaft by a drive means based on the change, wherein one magnetic pole connects the magnetic generation means to the first magnetic path forming drum. An electromagnet whose magnetic pole is arranged to face the second magnetic path forming drum, and a switch means that controls the electromagnet with a constant current by a constant current circuit and puts the driving means into a driveable state. A torque detection device for power steering, which is connected in series with an actuating means and a key switch. 2. The power supply according to claim 1, wherein the magnetic detection sensor is disposed between at least one magnetic pole of an electromagnet and the magnetic path forming drum facing the magnetic pole. Torque detection device in steering. 3. The drive means is a motor that drives a hydraulic pump that supplies hydraulic oil to a steering cylinder that rotates the second shaft in forward and reverse directions, the switch means is a contactor, and the actuation means is a contactor coil that operates the contactor. The torque detection device for power steering according to claim 1, which is connected to a motor and has a contactor coil connected to an electromagnet.