Zero adjustment device for servo actuator

Abstract

The invention discloses a zero adjustment device for a servo actuator. The zero adjustment device comprises a piston rod, a displacement sensor and an adjustment component, wherein the adjustment component comprises a piston rod fixing part, a guide rod nut locking part and a zero adjustment part; outer threads of the hollow piston rod fixing part are connected with inner threads of a locking nut, and then are connected with inner threads of the piston rod, so that the piston rod cannot do lateral rotation; the hollow guide rod nut locking part penetrates through the hollow part of the piston rod fixing part and is arranged in a front-end nut so as to adjust the axial movement of the front-end nut; the zero adjustment part penetrates through the hollow part of the guide rod nut locking part, and one end of the zero adjustment part is arranged in a guide rod nut to adjust the guide rod nut, so that the axial movement of the displacement sensor is further controlled. According to the zero adjustment device disclosed by the invention, during a zero adjustment process, the zero position offset of a product is effectively avoided; the frequency of repeated debugging is reduced; the delivery schedule of the product is accelerated; and the labor cost is reduced.

Description

technical field [0001] The invention relates to a zero-position adjustment device of a servo actuator, which is suitable for zero-position debugging of an electric displacement sensor of the servo actuator. Background technique [0002] When the displacement sensor is actually installed on the servo actuator for zero adjustment, the sensor housing is fixed in the inner hole of the actuator housing through the joint bearing, and its iron core assembly is fixed on the inner hole of the piston rod, and reciprocates with the piston rod. Realize the measurement of line displacement. [0003] Before zero adjustment of the servo actuator, it is necessary to remove the lock nut and bolt for zero adjustment. At this time, the piston rod is in an unlocked state, and the piston rod is in an active state during the tightening process of the front nut. When torque is applied, the product piston rod will be subjected to a lateral force, causing the position of the piston rod to shift. D...

AI Technical Summary

Problems solved by technology

[0006] As a product debugger, everyone cannot uniformly control the size of the force during the debugging process. A slight rotation can lead to changes in the electrical zero position, resulting in different degrees of difficulty in the zeroing process.

After the product is zeroed, the zero position of the product may change due to the slight vibration of the nozzle or the performance of the servo valve itself during the test, thus increasing the repeated zeroing work

[0007] The root cause of the above problems is that the mechanical zero position of the piston rod cannot be kept unchanged during the zero adjustment process, which leads to an increase in the zero adjustment workload. Therefore, it is necessary to add a mechanical zero position positioning device after analysis and design to solve this problem.

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