Yunbo torque sensor

Abstract

The invention relates to a Yunbo torque sensor. The Yunbo torque sensor comprises a torque sensor shell assembly, a torque shaft body assembly, a cantilever beam group force measurement assembly and abase assembly; the torque shaft body assembly converts a torque angle psi into an axial displacement variable quantity delta L of a small part of a force transmission sleeve through a thrust sleeve fastened on a torque shaft (1) and the force transmission sleeve axially sliding and falling on the torque shaft (1), and the axial displacement variable quantity delta L of the force transmission sleeve further acts on a cantilever sheet beam of the cantilever beam group force measurement assembly to output torque in real time. According to the Yunbo torque sensor, based on a strain gauge torque measurement principle technology, the technical scheme of the new concept of 'the torque shaft not sticking to a strain gauge' is adopted, and the pain point demands for the small size, the high rotating speed and the long service life of the torque sensor are met.

Description

technical field [0001] The invention relates to a sensor; specifically, it is a Yunbo torque sensor with a brand-new technical solution; it belongs to the technical field of modern sensors. [0002] technical background [0003] The torque sensor products in the prior art usually fall into three categories: phase difference torque sensor, slip ring torque sensor and electromagnetic coil torque sensor. [0004] The phase-difference torque sensor in the prior art has been gradually eliminated due to its bulky size and poor torque measurement accuracy in low-speed and high-speed regions. [0005] Due to the dynamic friction of the conductive ring in the existing slip ring torque sensor, it is easy to cause heating and wear of the conductive ring assembly; especially when the domestic slip ring torque sensor rotates at a speed exceeding 3000 rpm, the use of the sensor It is difficult to maintain a lifespan of about one year; but its small size is its biggest market advantage. ...

AI Technical Summary

Problems solved by technology

[0004] The existing phase-difference torque sensor has been gradually eliminated due to its bulky volume and poor torque measurement accuracy in low-speed and high-speed areas

[0005] Due to the dynamic friction of the conductive ring in the existing slip ring torque sensor, it is easy to cause heating and wear of the conductive ring assembly; especially when the domestic slip ring torque sensor rotates at a speed exceeding 3000 rpm, the use of the sensor The lifespan is difficult to maintain for about a year; but the small size is its biggest market advantage

[0006] The electromagnetic coil type torque sensor of the prior art uses an open-loop magnetic circuit structure instead of the conductive ring assembly, but the reluctance of the magnetic flux between the air-gap interface layers becomes larger, so that the electrical energy of the primary coil is coupled to the electrical energy of the secondary coil low conversion efficiency

In addition: the non-closed magnetic circuit is prone to electromagnetic radiation and electromagnetic interference from the outside world and other technical defects, and the reactance Z value of the electromagnetic wire coil is large, the frequency response speed is slow, and it is difficult to achieve real-time measurement of high-speed torque. The volume and shape of the sensor are several times larger than the slip ring torque sensor

[0007] Both the slip ring type torque sensor and the electromagnetic coil type torque sensor use the principle torque measurement technology that the strain gauge is pasted on the torque detection shaft: so the technical pain point of [static and dynamic electric energy coupling] cannot be avoided

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