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Torque detecting device

A torque detection, one-to-one technology, applied in the direction of measuring device, torque measurement, electric steering mechanism, etc., can solve the problems of increasing the number of parts and the influence of magnetic sensors

Inactive Publication Date: 2010-02-10
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, magnetic force from the outside may have a bad influence on the magnetic sensor
In order to prevent this, it is conceivable to install a magnetic shield plate on the above unit, but in this case, the number of parts will increase

Method used

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Examples

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Embodiment Construction

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this embodiment, a case where the torque detection device is applied to an electric power steering device of an automobile has been described, but the torque detection device can also be applied to devices or equipment other than the electric power steering device.

[0020] figure 1 It is a schematic diagram showing a schematic configuration of an electric power steering device to which a torque detection device according to an embodiment of the present invention is applied. refer to figure 1 , the electric power steering device 1 has: a steering shaft 4, which transmits the steering torque applied to the steering wheel 3 as a steering member in order to steer the steering wheel 2; Under the effect of steering steering wheel 2, for example, a rack and pinion mechanism constitutes. In addition, the electric power steering apparatus 1 has an intermediate sha...

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PUM

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Abstract

A torque detecting device (16) is provided with first and second units (38, 39). The first unit (38) includes a first synthetic resin (40) formed by molding a pair of magnetic flux inducing rings (34A, 34B). The second unit (39) includes a second synthetic resin (41) fixed to a magnetic shield plate (37B) containing a metal; an inserting protruding section (44) arranged on the synthetic resin (41); and magnetic sensors (35A, 35B) held by the inserting protruding section (44). The first synthetic resin (40) includes a receiving plate (38a) whereupon a base (38e) for receiving the magnetic shield plate (37B) is formed. In a status where the receiving plate (38a) exists between the magnetic shield plate (37B) and an object (30) to be attached, both the magnetic shield plate (37B) and the receiving plate (38a) are fastened to the object (30) by a pair of fixing screws (32).

Description

technical field [0001] The present invention relates to a torque detection device. Background technique [0002] The torque detection device has, for example: an input shaft and an output shaft coaxially connected by a torsion bar; a permanent magnet fixed to the input shaft; and a soft magnetic body arranged in the magnetic field of the permanent magnet and formed of a magnetic circuit and fixed to the output shaft. a plurality of magnetic yokes; a pair of magnetic flux collection rings that sense the magnetic flux from the magnetic yokes; and a magnetic sensor that detects the magnetic flux induced on the magnetic flux collection rings. The pair of magnetic collecting rings respectively have claw pieces arranged opposite to each other. A magnetic sensor is arranged between a pair of claw pieces (for example, refer to Patent Document 1). [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2004-101277. [0004] However, such a torque detection device is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/10B62D5/04
Inventor 有田敬三高山慎吾吉田一恭
Owner JTEKT CORP
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