External linear displacement sensor anti-torsion structure with rotatable actuator piston rod

A piston rod and actuator technology, which is applied in the field of anti-twist structure of external linear displacement sensor, can solve the problems of large error of feedback displacement signal of external sensor, no consideration of anti-twist structure design, and influence on actuator position control accuracy. , to achieve the effect of improving axial positioning accuracy, facilitating engineering processing and installation, and improving servo control accuracy

Pending Publication Date: 2022-03-04
QINGAN GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the relative technology, the installation structure of the piston rod end of the external sensor either does not consider the design of the anti-rotation structure, and only adjusts the assembly during assembly; or the design is relatively simple and unreliable, which will cause the feedback displacement signal error of the external sensor of the actuator Large, affecting the position control accuracy of the actuator

Method used

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  • External linear displacement sensor anti-torsion structure with rotatable actuator piston rod
  • External linear displacement sensor anti-torsion structure with rotatable actuator piston rod
  • External linear displacement sensor anti-torsion structure with rotatable actuator piston rod

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Embodiment Construction

[0027] see Figure 1-7 , the overall installation structure of the linear displacement sensor involved in the present invention on the actuator is as follows figure 1 as shown, figure 2 shown with figure 1 The part of the sensor core assembly connected to the middle actuator piston assembly 1, image 3 shown with figure 1 The part of the sensor housing assembly where the middle actuator cylinder 2 is fixed. The part of the sensor core assembly connected to the actuator piston assembly 1 is designed to have a structure with axial positioning pins, so that the piston rod assembly can only produce radial rotation with the iron core rod bracket and its accessories under the action of external torque, while There is no radial torque, and the core rod bracket and its accessories can reliably move axially with the piston rod assembly.

[0028] Among them, the sensor core assembly connected with the actuator piston assembly 1 can resist the external torque acting on the bracket ...

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Abstract

The invention provides an external linear displacement sensor anti-torsion structure with a rotatable actuator piston rod. The external linear displacement sensor anti-torsion structure comprises an axial positioning pin, a positioning pin bush, a positioning pin anti-falling ring, a support, an axial guide rod and a metal shell. The support is installed on an actuator piston rod through the axial positioning pin, the positioning pin bush and the positioning pin anti-disengaging ring, and the axial guide rod is installed on the support and is in coaxial clearance fit with a guide hole in the metal shell. Wherein the positioning pin bushing is fixedly installed on the actuator piston rod, the support is connected to the positioning pin bushing in a sleeving mode, fixed through the axial positioning pin and used for preventing the support from moving in the axial direction of the actuator piston rod but allowing radial rotation, and the metal shell is fixedly installed on the actuator shell and used for fixing the support to the actuator piston rod. Axial movement of the axial guide rod and the bracket along the actuator piston rod is allowed, but radial rotation is limited.

Description

technical field [0001] The invention belongs to the technical field of flight control systems, and in particular relates to an anti-twist structure of an external linear displacement sensor with a rotatable actuator piston rod. Background technique [0002] The shell assembly of the external line displacement sensor installed on the general servo actuator is fixed to the cylinder body of the actuator, and the core assembly part of the sensor is fixedly connected to the output end of the piston of the actuator. Since only axial linear displacement is allowed between the core rod assembly and the sensor housing assembly, radial rotation is not allowed, and the piston rod assembly may generate radial torque during the actuator assembly, machine installation and disassembly process. Therefore, in order to avoid damage to the sensor, a special anti-twist structure needs to be provided so as not to affect the radial rotation of the piston rod assembly when assembling or installing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/02
CPCG01B21/02
Inventor 滕利强曹圣兵王文山
Owner QINGAN GRP
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