Stroke measurement signal output type hydraulic cylinder

Abstract

The invention discloses a stroke measurement signal output type hydraulic cylinder. The hydraulic cylinder comprises a hydraulic cylinder body, a hollow piston rod, a through hole piston, a positioning pin, a groove guide rod and an angle sensor, wherein the groove guide rod arranged with curve guide grooves penetrate through the through hole piston and is arranged in the hollow piston rod, and the other end of the groove guide rod penetrates through the bottom of the hydraulic cylinder and is connected with the angle sensor. According to the stroke measurement signal output type hydraulic cylinder, the positioning pin slides in the curve guide grooves of the groove guide rod when the through hole piston pushes the hollow piston rod to do linear motion, a rotary motion of the groove guiderod can be synchronously generated, and the angle sensor is driven to output analog or digital signals in real time; and according to a maximum spiral angles of the curve guide grooves and a maximum travel distance of the through hole piston, a piston movement travel amount corresponding to a rotation angle signal output by the rotation of the angle sensor driven by the groove guide rod can be judged.

Description

technical field [0001] The invention relates to a stroke measurement signal output type hydraulic cylinder, which can output data signals of the stroke amount of the hydraulic cylinder piston in real time, and belongs to the technical field of hydraulic equipment. Background technique [0002] The current construction machinery automation and electromechanical integration automation often need to detect and control the working stroke of the piston in the hydraulic cylinder of the working device and the traveling device. [0003] A known piston stroke detection method in a hydraulic cylinder is to install a displacement sensor outside or inside the hydraulic cylinder. [0004] The displacement sensor is installed outside the hydraulic cylinder, and the stroke information of the hydraulic piston can be obtained by measuring the change of the length of the hydraulic rod outside the hydraulic cylinder. This method needs to occupy the external space of the hydraulic cylinder, and...

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Problems solved by technology

[0004] The displacement sensor is installed outside the hydraulic cylinder, and the stroke information of the hydraulic piston can be obtained by measuring the change of the length of the hydraulic rod outside the hydraulic cylinder. This method needs to occupy the external space of the hydraulic cylinder, and the installation is relatively complicated, and external forces and other factors may affect it. The environment and narrow space of the sensor parts are not suitable for this method

[0005] The way of installing the displacement sensor inside the hydraulic cylinder will make the internal installation structure of the hydraulic cylinder complicated, the cost is high, the stability is poor, and the repair and maintenance are very difficult.

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