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Screw rod and threaded hole perpendicularity test tool with same

A threaded hole and screw technology, which is applied in the field of threaded hole verticality inspection tools, can solve the problems affecting the accuracy of detection results and the radial deflection of detection screws, etc., and achieve the effects of eliminating radial clearance, improving precision, and accurate positioning

Active Publication Date: 2014-11-12
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inspection tool adopts the detection screw of the same specification to cooperate with the thread of the threaded hole to be tested for detection, but due to processing errors, there is often a certain radial gap in the cooperation between the threaded hole to be tested and the detection screw, resulting in the relative radial deviation of the detection screw , affecting the accuracy of the detection results

Method used

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  • Screw rod and threaded hole perpendicularity test tool with same
  • Screw rod and threaded hole perpendicularity test tool with same
  • Screw rod and threaded hole perpendicularity test tool with same

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Embodiment Construction

[0040] Embodiment of threaded hole verticality inspection tool among the present invention: as Figure 1 to Figure 22As shown, the threaded hole verticality inspection tool includes a reference base 5, the reference base 5 has a reference disc and a shaft sleeve integrally arranged with the reference disc, the axis of the shaft sleeve is perpendicular to the disc surface of the reference disc, and the reference circle The disc is provided with a central through hole 54 which communicates with the inner hole of the shaft sleeve and is used to wear the central screw 7. The reference disc is provided with a central through hole 54 extending along the arc to make the detection dial indicator 13 The guide slot 51 through which the measuring rod passes, two groups of circumferential limiting holes 52 are arranged at intervals along its axial direction on the shaft sleeve, and each set of circumferential limiting holes 52 is three slotted holes evenly distributed along the circumferen...

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Abstract

The invention relates to a screw rod and a threaded hole perpendicularity test tool with the same. The screw rod comprises a central screw rod body, a taper sleeve, at least two external threaded blocks evenly distributed on the periphery of the taper sleeve in the circumference direction, and an elastic maintaining structure used for hooping the external threaded blocks on the peripheral face of the taper sleeve. A threaded part used for being connected with the central screw rod body in a threaded mode is arranged in the taper sleeve, the peripheral face of the taper sleeve is an external taper face with the small end and the large end distributed in the axial direction of the central screw rod body, the external threaded blocks are provided with external threads coaxial with the central screw rod body, the external threaded blocks and the taper sleeve are matched in the axial direction of the central screw rod body in a rotation-stopping movement mode, and the external threaded blocks are further provided with inner taper faces which are matched with the external taper face of the taper sleeve and are subjected to radial opening acting force under the axial moving effect of the taper sleeve. The central screw rod body is rotated to enable the external threaded blocks to be expanded and retracted, so that the diameter of the circumferential face where the external threaded blocks are located is changed, and when the screw rod is used for carrying out threaded hole perpendicularity testing, the radial gap generated when the screw rod is connected with a tested threaded hole can be eliminated, and precision of a testing result is improved.

Description

technical field [0001] The invention relates to a screw rod and a threaded hole perpendicularity inspection tool using the screw rod. Background technique [0002] Existing inspection tools for detecting the verticality of threaded holes, such as the Chinese patent "Checking Tool for Verticality of Threaded Holes" with the authorized announcement number CN 201302442Y, include a cylindrical reference seat with a screw hole in the center and a threaded hole installed in the center of the inspection tool. For the detection screw in the screw hole of the reference base, the position where the reference base deviates from the screw hole is also provided with a through hole for wearing a dial indicator. The probe of the dial indicator passes through the through hole and is used to contact the end surface of the threaded hole to be measured. When testing, screw the detection screw into the threaded hole to be tested, set the reference base on the detection screw, make the probe of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/245
Inventor 张子明符严平张维浩刘雅娟孔玉辉
Owner STATE GRID CORP OF CHINA
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