An integrated measuring central axis device for an electric vehicle

Abstract

The invention discloses an integrated middle shaft measuring device of an electric vehicle. The device comprises a middle shaft, a middle shaft sleeve, a speed induction magnetic ring, a Hall induction element, a tensile force induction magnet and a tensile force induction Hall IC. The speed induction magnetic ring is fixed to the middle shaft, the Hall induction element is fixed to the middle shaft sleeve, and is close to the speed induction magnetic ring, a tensile force induction spring for directly or indirectly inducing the tensile force of a transmission element through active force of the middle shaft is arranged on the wall of the rear side of the middle shaft sleeve, the tensile force induction magnet is fixed to the tensile force induction spring, the tensile force induction Hall IC is fixed to the middle shaft sleeve, the tensile force induction magnet is close to the tensile force induction Hall IC, and when the middle shaft pushes the tensile force induction spring backwards, the tensile force induction spring generates a certain amount of deformation, the tensile force induction magnet moves corresponding displacement relative to the tensile force induction Hall IC, and the tensile force induction Hall IC inducts the displacement through the Hall and outputs a tensile force value signal. The structure is simple, cost is low, measurement is accurate, and an existing structure of the vehicle is not affected.

Description

technical field [0001] The invention relates to the technical field of central axis devices for electric vehicles, in particular to an integrated measuring central axis device for electric vehicles. Background technique [0002] In the prior art, the pedal assist sensor in the pedal assist system of an electric vehicle includes measuring devices such as a faceplate torque of the center shaft and a rear dropout torque sensor. The center shaft torque sensor of the faceplate collects the torque and speed signals, but its structure is complex, the cost is high, and the shape is clumsy. When the front shift is realized, the structure is more complicated and the defect rate is high. The rear hook torque sensor senses the tension of the chain and converts the corresponding chain tension into a corresponding electrical signal. However, it may cause a certain deformation of the rear hook when it encounters strong vibration of the whole vehicle or long-term riding. Affects the induct...

AI Technical Summary

Problems solved by technology

The center axis torque sensor of the faceplate collects the torque and speed signals, but its structure is complex, the cost is high, and the shape is clumsy. When the front shift is realized, the structure is more complicated and the defect rate is high

The rear hook torque sensor senses the tension of the chain and converts the corresponding chain tension into a corresponding electrical signal. However, it may cause a certain deformation of the rear hook when it encounters strong vibration of the whole vehicle or long-term riding. Affects the induction of the magnitude of the torque signal, resulting in a decline in electric power assistance

At the same time, it requires that the rear right dropout of the frame must be used with a special rear dropout sensor, which does not satisfy the universality of the frame and also affects the cost of the whole vehicle, so it is necessary to improve and develop it

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