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Micrometer for measuring over-ball distance between external gear and external spline

A micrometer and external spline technology, applied in the field of length measuring instruments, can solve the problems of influence on the accuracy of measurement results, poor measurement efficiency, unsuitable for self-inspection by front-line workers, etc., and achieves low measurement skills requirements, low manufacturing costs, and installation. easy effect

Active Publication Date: 2011-04-27
JIANGSU AIRSHIP GEAR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, the accuracy of the measurement results is affected, and the measurement efficiency is poor
The existing cross-ball distance measurement technology is only suitable for professionals to measure, not suitable for front-line workers to use for self-inspection in production

Method used

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  • Micrometer for measuring over-ball distance between external gear and external spline
  • Micrometer for measuring over-ball distance between external gear and external spline

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Embodiment Construction

[0012] The present invention will be further described below according to accompanying drawing.

[0013] The cross-ball micrometer for measuring external gears and external splines shown in the accompanying drawing is composed of a micrometer 1, a measuring head 2 and a ring ring 3. The measuring head 2 is composed of a spherical measuring head, an intermediate transition shaft and a pin shaft. The pin shaft section is inserted into the small hole of the anvil 1.1 at both ends of the micrometer 1. The spherical measuring head directly contacts the workpiece to be measured. The spherical measuring head is Φ2mm~ For a sphere of Φ50mm, the pin shaft section matched with the measuring anvil 1.1 is a cylinder, and the middle section of the cylinder is provided with a concave ring groove for installing a snap spring 3 . In the present invention, the measuring heads 2 are used in pairs, the diameters and tolerance zones of the spherical measuring heads of the two measuring heads are ...

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Abstract

The invention discloses a micrometer for measuring over-ball distance between an external gear and external spline, which is composed of a micrometer, measuring heads and a snap ring, wherein each measuring head is composed of a spherical measuring head, an intermediate transition shaft and a pin shaft; the pin shaft sections are respectively inserted into pinholes of measuring anvils at both ends of the micrometer; and the measuring end of each measuring head is a sphere with the standard diameter of Phi2mm-Phi50mm. The measuring heads are used in pairs; the diameters and tolerance zones of the spherical measuring heads are equal; and the distances between the end surfaces of the measuring anvils and the sphere centers of the spherical measuring heads are equal. After being installed in position, the measuring heads are adjusted to zero and then directly used for measuring the over-ball distance. The micrometer provided by the invention fully utilizes the length precision metering mechanism of a commodity micrometer for metering, has the advantages of simple composite structure and accurate measurement, is convenient in measurement operation, and is especially suitable for being used as an on-line measuring tool for production.

Description

technical field [0001] The invention relates to a length measuring instrument, in particular, the invention relates to a micrometer for accurately measuring the pitch of an involute external gear, an involute external spline and a triangular external spline. Background technique [0002] Involute external gears, involute external splines and triangular external splines in mechanical parts all belong to a type of external tooth parts, and their structures have a common important structural dimension—the actual tooth thickness. There is no precision measuring tool to directly measure the actual tooth thickness in the existing measuring tools, only the common normal line or cross-ball distance measurement is used to indirectly reflect the actual tooth thickness value. The measurement of the common normal is a known and mature technology. There are commercial micrometers for measuring the common normal on the market, which can accurately measure the length of the common normal. ...

Claims

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Application Information

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IPC IPC(8): G01B5/02G01B3/18
Inventor 金九如
Owner JIANGSU AIRSHIP GEAR
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