Planetary gear speed reducer capable of carrying out torque detection simultaneously

Abstract

The invention relates to a speed adjusting device used for a motor and assisted by gear device mechanical connection, in particular to a planetary gear speed reducer capable of carrying out torque detection simultaneously. The planetary gear speed reducer comprises a front cover, a shell body and an inner gear ring, the inner gear ring is embedded into the shell body, the inner gear ring and the shell body can rotate relatively, an inward-protruding boss is arranged on the side, close to the front cover, on the inner wall of the shell body in the circumferential direction, a check ring is fixedly arranged at the position corresponding to the boss in the circumferential direction, part of the inner gear ring is located between the boss and the check ring, a protruding check block is arranged on the outer wall of the inner gear ring, the center of the check block and the center of the inner gear ring are located on the same horizontal plane, a groove is formed in the inner wall of the shell body adjacent to the check block, the check block stretches into the groove, a piezoelectric transducer is arranged below the check block, and the piezoelectric transducer is connected with a charge amplifier and a signal processor in sequence through signal cables. The planetary gear speed reducer can simplify a transmission system and improve the measurement precision of dynamic torque.

Description

technical field [0001] The present invention relates to a device specially adapted for regulating or controlling the speed or torque of two or more electric motors, and in particular to a device for the speed of two or more electric motors which are related to each other and which are mechanically connected by means of a gear arrangement. Adjusting device. Background technique [0002] As we all know, the NGW planetary gear reducer has a series of characteristics such as coaxiality, large transmission ratio range, stable operation and high transmission efficiency. And other fields have a wide range of applications. In the transmission system, a torque sensor (or speed torque sensor) is usually installed between the NGW type planetary gear reducer and the load, which is used to monitor, control and fault identification and forecast the operating state of the transmission system. In some special systems, torque sensors are installed before and after the NGW planetary gear re...

AI Technical Summary

Problems solved by technology

At present, there are many types of torque sensors, which can be classified into two categories according to their working principles. The first type is based on shear stress, which uses strain gauges to measure the shear stress of the transmission shaft to calculate the torque. The chip technology is closely related, and the accuracy is low. In addition, devices such as collector rings and brushes are required to output signals, but collector rings and brushes are easy to wear, resulting in low signal measurement accuracy; the second type is based on torsional deformation The torque is calculated by measuring the torsional deformation of the transmission shaft by using the angle difference between the two ends of the torsion shaft. The commonly used methods are relative displacement method, photoelectric method and magnetic resistance method, etc., but the transmission shaft needs to be disconnected, which is inconvenient to use.

In short, according to the existing torque measurement technology, no matter it is based on shear stress or torsional deformation, the accuracy of dynamic torque measurement is relatively low due to the difficult problems of temperature compensation and initial phase compensation.

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