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Relative rotational angular displacement detection device, torque detection device, torque control device, and vehicle

A technology of relative rotation and angular displacement, which is applied in the direction of measuring devices, torque measurement, and electric devices, etc., can solve the problems of increased manufacturing and assembly costs of detection devices, and achieve the effect of simple manufacturing and assembly

Inactive Publication Date: 2014-03-26
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the manufacturing and assembly costs of the detection device will increase when the detection accuracy is improved.

Method used

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  • Relative rotational angular displacement detection device, torque detection device, torque control device, and vehicle
  • Relative rotational angular displacement detection device, torque detection device, torque control device, and vehicle
  • Relative rotational angular displacement detection device, torque detection device, torque control device, and vehicle

Examples

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Embodiment Construction

[0040] Hereinafter, based on applying the relative rotation angle displacement detection device involved in the present invention to an electric power-assisted bicycle (refer to Figure 7 ) The illustrated embodiment of the power assist system will be described. In addition, it goes without saying that the relative rotation angle displacement detection device according to the present invention is not limited to the case of being used in a power assist system of an electric power assist bicycle, and may be used for detecting the relative rotation angle displacement of a pair of rotation members that rotate relative to each other. Used in various devices and mechanisms. In addition, for example, the present invention is also suitable for use in electric power-assisted wheelchairs (refer to Figure 8 ), the power steering device of the car (refer to Figure 9 ) and other power assist systems.

[0041] Such as figure 1 As shown, regarding the relative rotation angle displaceme...

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Abstract

The present invention provides a relative rotational angular displacement detection device, a torque detection device, a torque control device, and a vehicle. A relative rotational angular displacement detection device includes a pair of rotatable members relatively rotatable in a circumferential direction. A permanent magnet is attached to one of the rotatable members and includes magnetic poles magnetized in an axial direction of the axis of rotation and arranged to alternate in polarity in the circumferential direction. A magnetic flux inducing ring includes an annular ring body attached to the other of the rotatable members and is arranged coaxially with the axis of rotation, and a plurality of protrusions having a circumferential width smaller than a circumferential width of a magnetic pole. A magnetic detection portion is configured to detect a magnetic flux of the ring body of the magnetic flux inducing ring. The flux inducing ring is magnetized depending on a relative positions the protrusions and positions of the magnetic poles.

Description

technical field [0001] The present invention is used to detect the relative rotational angular displacement of a pair of rotating members whose rotational axes are coaxially arranged, and relates to a power assist (assist) system suitable for use in, for example, so-called electric power-assisted wheelchairs, electric power-assisted bicycles, or power steering devices. A relative rotation angle displacement detection device used in the system, a torque detection device and a torque control device using the detection device, and an electric power-assisted wheelchair, an electric power-assisted riding vehicle, and a power steering device equipped with the torque control device. Background technique [0002] For example, in conventional manual wheelchairs, on the outer sides of a pair of left and right large wheels, hand rings are fixed on the large wheels so that the axis of rotation is coaxial with the axis of the axle shaft. When the user rotates the hand rings, the rotationa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/30G01L3/00
CPCA61G5/04A61G2203/38A61G5/048B62J45/41G01D5/2451G01L3/1435G01D2205/40G01B7/30
Inventor 日野阳至中村和人
Owner YAMAHA MOTOR CO LTD
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