Intelligent electric push rod internally integrated with sensor

Abstract

The invention relates to an intelligent electric push rod internally integrated with a sensor, and the push rod comprises a piston rod which is of a hollow rod-shaped structure, the second end of the piston rod is provided with an annular flange, the annular flange is sleeved with a piston ring, and the piston rod close to the annular flange is provided with a strain gauge pasting groove for accommodating a strain gauge; the first end of the ball screw is arranged in the cavity of the piston rod, and the second end of the ball screw is sleeved with a bearing; the rotor shaft is of a hollow tubular structure, the second end of the ball screw is assembled in a cavity of the first end of the rotor shaft, the ball screw and the rotor shaft are connected in an interference fit mode, and the second end of the rotor shaft is sleeved with a bearing and a bearing seat containing the bearing; the magnetic bead is in interference fit connection with the second end of the rotor shaft, the sensor is fixedly connected with the bearing seat, and a certain distance is reserved between the sensor and the magnetic bead. According to the push rod, the unbalance loading problem caused by the fact that the piston rod is subjected to lateral force is greatly eliminated, and meanwhile the installation concentricity problem of a traditional force sensor is avoided.

Description

Technical field [0001] The invention involves an internal integrated sensor smart electric push rod, which is the field of push rod technology. Background technique [0002] Electric push rod is a general -purpose driver device that can be widely used in medical, furniture, family, electronics, electrical, mechanical, metallurgy, transportation, mines, oil, chemical, lifting, transportation, construction, grain and processing and other industries and other industries Essence When applied to certain industries, such as medical, mechanical precision systems, robot systems, etc., it is necessary to accurately control the electric push rod. control. The position sensor usually uses the displacement sensor, the rotary encoder, and the switch is close to the switch. The force sensor is often used in the straight line of the push rod. Or the telescopic rod end series is fixed through the thread, but the thread connection is difficult to ensure that the concentric and the sensors are una...

AI Technical Summary

Problems solved by technology

Position sensors usually use displacement sensors, rotary encoders, proximity switches, etc.; force sensors, commonly used are tension and pressure sensors that are stressed in the linear direction of the push rod, and this sensor is usually connected to the end of the cylinder of the push rod. Or the ends of the telescopic rods are fixed in series through threads, but the threaded connection is difficult to ensure the concentricity of the sensor and the push rod cylinder, and the sensor is inevitably subjected to lateral force, which will cause measurement errors to the force sensor, and then interfere with the feedback closed loop. , affecting the precise control of the mechanism

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