Round hole inner diameter measuring instrument

Abstract

The invention discloses an inner diameter measuring instrument and relates to a measuring tool. The inner diameter measuring instrument is provided with a measuring rod, wherein a measuring gauge outfit is arranged on the front end portion of the measuring rod, and a measuring probe is arranged on the measuring gauge outfit. The inner diameter measuring instrument is characterized in that a positioning seat is arranged, at least four positioning rods of adjustable lengths are evenly arranged on the positioning seat, positioning blocks are arranged on front end portions of the positioning rods, and the measuring rod is hinged in the center of the positioning seat through a hinged shaft. In the process of use, the positioning seat is arranged on a round hole of a part, the lengths of the positioning rods are adjusted to enable the center of the positioning seat to coincide with the center of the round hole and be fixed, at the moment, the measuring rod is rotated, the measuring probe of the measuring gauge outfit of the front end of the measuring rod slides along the inner wall of the round hole, and according to the length of the measuring rod and measuring value displayed by the measuring gauge outfit, the radius of the round hole can be obtained. According to changes of the measuring value of the measuring gauge outfit, the inner diameter measuring instrument can detect whether roundness and concentricity of the round hole confirm to the standard or not and can confirm the position which is not up to standard. The inner diameter measuring instrument is convenient to repair and maintain, after repaired and maintained, mechanical vibration amplitude is small, mechanical performance is improved, the inner wall of the round hole is not easy to abrade, and service life is long.

Description

technical field [0001] The invention relates to a measuring tool, in particular it is a circular hole inner diameter measuring instrument which can not only measure the inner diameter of the circular hole but also detect the circularity and concentricity of the circular hole. Background technique [0002] We know that at present, most of the connection holes between the various parts of various machines are round holes. When processing the round holes of the parts, the inner diameter measuring instrument is used to measure the inner diameter of the relevant round holes. Grinding and repairing. The existing inner diameter measuring instrument is provided with a measuring rod, the front end of the measuring rod is provided with a measuring head, and the measuring head is provided with a measuring probe. The measuring probe on the measuring head at the front end of the rod leans against the inner wall of the round hole on the opposite side, and the measuring head shows the mea...

AI Technical Summary

Problems solved by technology

The existing inner diameter measuring instrument is provided with a measuring rod, the front end of the measuring rod is provided with a measuring head, and the measuring head is provided with a measuring probe. The measuring probe on the measuring head at the front end of the rod leans against the inner wall of the round hole on the opposite side, and the measuring head shows the measured value. Adding the length of the measuring rod to the measured value is the inner diameter of the round hole. This inner diameter measuring instrument It can only measure the size of the inner diameter of the round hole, but cannot detect the roundness and concentricity of the round hole. When the roundness and concentricity of the round hole have large errors, the vibration amplitude of the machine will be large, which will affect the overall performance of the machine. Wear and tear, short service life of machinery

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