Device for measuring push-pull force output by rotating hydraulic cylinder

Abstract

The invention discloses a device for measuring a push-pull force output by a rotating hydraulic cylinder, which comprises a rotation strain signal coupler, wherein the rotation strain signal coupler consisting of a rotor, a stator, a power and signal preprocessing circuit, two groups of rotating transformation couplers, a rotor wiring end and a junction box provided with an alternating-direct current conversion and signal post-processing circuit; the two ends of the rotor are provided with a rolling bearing respectively; the two ends of the stator are provided with a square end cover respectively; the two square end covers are in fit with square guide rails in through holes of a guide rail sleeve; the junction box is arranged on the outer surface of the guide rail sleeve; the two ends of a dynamometer link are provided with screw thread with an identical thread pitch respectively; the outer surface of the middle part of the dynamometer link is pasted with strain foils which are connected into a wheatstone strain bridge; and two power terminals and two signal terminals of the wheatstone strain bridge are connected with the rotor of the rotation strain signal coupler. The device measures the push-pull force output by the hydraulic cylinder in rotation, and has the characteristics of stable and reliable gap between the rotor and the stator of the rotation strain signal coupler, no frictional wear, capacity of executing measurement at any position of a travel route of a piston rod, and convenient assembly and disassembly.

Description

technical field [0001] The invention relates to a force measuring device, in particular to a device for measuring the push-pull force output by a rotary hydraulic cylinder. Background technique [0002] The rotary hydraulic cylinder is a functional part of the CNC lathe. It drives the power chuck to clamp and release the workpiece through the pull tube or pull rod. A hydraulic lock composed of two hydraulically controlled check valves is integrated inside the high-speed rotary hydraulic cylinder. When the high-speed rotary hydraulic cylinder suddenly encounters the oil supply pipeline burst, the hydraulic lock works to maintain the oil pressure in the high-pressure chamber of the rotary hydraulic cylinder. It remains unchanged to ensure that the rotary hydraulic cylinder still reliably drives the power chuck to clamp the workpiece, preventing the workpiece from flying out and causing safety accidents. The pressure holding capacity of the hydraulic lock is directly related t...

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Problems solved by technology

[0004] The safety of the machine tool requires that the hydraulic lock of the rotary hydraulic cylinder can maintain the pressure under the working condition of high-speed rotation, but the commonly used pressure-holding test device can only be Test the pressure-holding performance of the hydraulic lock of the rotary hydraulic cylinder when it is not rotating, but cannot test the pressure-holding performance of the hydraulic lock under the condition of high-speed rotation

[0005] The push-pull force output by the rotary hydraulic cylinder is also the input force of the power chuck. When controlling the clamping force of the power chuck, the push-pull force output by the rotary hydraulic cylinder is An important intermediate parameter and detection parameter, but so far there is no device that can detect the push-pull force output by the rotary hydraulic cylinder when rotating

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