Elastic elements for steering wheel torque sensors

Abstract

The invention discloses an elastic element applied to a torque sensor of a steering wheel. The elastic element is characterized by comprising a torque sensing part with a barrel body at the middle part and flange plates at the two ends, wherein an upper connecting body is externally sleeved on the barrel body of the torque sensing part by an upper connecting ring and fixedly connected to the flange plates; two upper ring tiles are symmetrically arranged on the outer circumference of the upper connecting ring; each upper ring tile is symmetrically provided with upper connecting lugs along the two sides of the circumferential direction; a lower connecting body is opposite to the upper connecting body by a lower connecting ring, lower ring tiles and lower connecting lugs of the lower connecting body; each upper ring tile and each lower ring tile are arranged on the same circumferential position and staggered one by one; the adjacent upper connecting lug and lower connecting lug are connected by a steel sheet to form a whole ring; and a strain gauges is arranged on each steel sheet. The elastic element can improve resolution and measuring precision.

Description

technical field [0001] The invention relates to an elastic element applied to a steering wheel torque sensor. Background technique [0002] The structural form of the elastic element of the torque sensor in the prior art uses a basic torque sensing part as the elastic element, and two to eight strain gauges are symmetrically attached to the center of the outer surface of the middle cylinder of the elastic element. When the torque is loaded on both ends of the elastic element , the elastic element is deformed, and the deformation is sensed by the strain gauge and forms a change in electrical parameters, and then a change in torque is obtained through subsequent circuit processing. [0003] The structure of this elastic element is relatively simple, but in order to meet the range requirements, the cylinder wall must be thicker, the elastic element is very insensitive to torque, and the resolution and measurement accuracy are low; thus making the signal detected by the strain g...

AI Technical Summary

Problems solved by technology

[0003] The structure of this elastic element is relatively simple, but in order to meet the range requirements, the cylinder wall must be thicker, the elastic element is very insensitive to torque, and the resolution and measurement accuracy are low; thus making the signal detected by the strain gauge very weak , susceptible to interference, difficult to be processed by subsequent circuits, and prone to inaccurate measurement and poor repeatability due to interference such as lateral force

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