Torsion sensor for built-in motor

Abstract

The invention discloses a torsion sensor for a built-in motor. The torsion sensor comprises a shaft, a shaft sleeve, a sensing original part and a connection piece arranged on the shaft sleeve; the shaft sleeve is in sleeving connection with the shaft; the shaft and the shaft sleeve are fixedly connected and synchronously rotate; the sensing original part is arranged on the surface of the shaft sleeve; the connection piece is in sleeving connection with the shaft sleeve; and the connection piece is fixed at one end of the shaft sleeve and synchronously rotates with the shaft sleeve. In a left-and-right shaft sleeve connection mode, acquisition on torsions at both sides is implemented. By using a connection part, separation of the motor and a sensor is implemented so as to ensure use safety. By using the connection part as one part of an isolator, the integration level is improved. A torsion signal is acquired by using a strain gauge, so that accuracy is high and sensitivity is good.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a torque sensor with a central motor. Background technique [0002] With the development of economy and technology, the bicycle industry has also gone through several stages of bicycles, electric vehicles and power-assisted bicycles. Among them, power-assisted bicycles have also begun to shift from front and rear power-assisted wheel drive to mid-mounted motor power-assisted drive, and the torque sensor is an important part of the mid-mounted motor. The component part, the design of the torque sensor, directly affects the driving effect and reliability of the mid-mounted motor. The existing torque sensor usually uses the method of measuring torsional deformation or magnetic change to measure the torque, and has the disadvantage of not being able to measure bilaterally. Simultaneously, the device should also be separated from the motor when there is no human input, so as to ensure the ridin...

AI Technical Summary

Problems solved by technology

[0002] With the development of economy and technology, the bicycle industry has also gone through several stages of bicycles, electric vehicles and power-assisted bicycles. Among them, power-assisted bicycles have also begun to shift from front and rear power-assisted wheel drive to mid-mounted motor power-assisted drive, and the torque sensor is an important part of the mid-mounted motor. The component part, the design of the torque sensor, directly affects the driving effect and reliability of the mid-mounted motor. The existing torque sensor usually uses the method of measuring torsional deformation or magnetic change to measure the torque, and has the disadvantage of not being able to measure bilaterally. At the same time, the device should also be separated from the motor when there is no human input, so as to ensure the riding safety of the personnel.

Images