Action force detecting unit for rotary member

Abstract

The invention relates to an action force detecting unit for a rotary member that detects a force acting on a rotary member such as a rotary shaft and a wheel easily and accurately. The action force detecting unit comprises a first rotor (3) rotated integrally with a tire (23); a second rotor (4) rotated relatively to the first rotor (3); a case (2) fixed to a vehicle body (22) while rotatably supporting the first rotor and the second rotor; a first thrust bearing (5) supporting the first rotor; a second thrust bearing (6) supporting the second rotor; a load translating mechanism transmitting atorque between the first rotor and the second rotor while translating the torque partially into a thrust force; a detector fixed to the case to detect a flexure relating to the thrust force applied to the second thrust bearing; a calculator calculating the force acting on the tire based on the flexure detected by the detector; and a transmitter transmitting a signal in accordance with a torque calculated by the calculator.

Description

technical field [0001] The invention relates to a device for detecting loads such as torque and axial force acting on a rotating body. Background technique [0002] Patent Document 1 describes a measuring device that detects torque and axial force acting on a wheel. The measuring device described in this patent document 1 is mainly composed of a disk-shaped and elastically deformable main body for the purpose of shortening the axial dimension, simplifying the structure, and reducing the cost. The main body is attached to the hub on the axle side, and the body of the wheel is attached to the hub with the main body interposed therebetween. In the main body portion, hub fastening bolt holes and wheel body fastening holes are alternately formed at equal intervals on a virtual first concentric circle. Between the hole for hub fastening and the hole for wheel body fastening, a separation hole extending long in the radial direction is formed. In addition, a deformation portion (...

AI Technical Summary

Problems solved by technology

On the contrary, in order to improve the detection accuracy of the sensor element mounted on the receptor, it is necessary to make the receptor have a certain degree of elasticity, so that the receptor is easily deformed and the output gain of the sensor element is increased.

However, in the device described in Patent Document 3, it is not easy to combine the two contradictory functions of high strength and rigidity and high elasticity for obtaining a large amount of deformation in the susceptor as a strength member.

[0010] In this way, there is still room for improvement in terms of easily and accurately detecting loads acting on the rotating body (acting force of the rotating body) such as torque and axial force

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