Detection tool and method for detecting tooth root circle diameter of odd gear

Abstract

The invention provides a detection tool and method for detecting the tooth root circle diameter of an odd gear, and solves the problems that the process of detecting the tooth root circle diameter ofthe odd gear with the small tolerance is tedious and low in detection efficiency. The detection tool comprises a detection body, a dial indicator and two fixed measuring rods, wherein the detection body is provided with a first through hole which is through in the axial direction; the detection body is provided with two second through holes and a third through hole which communicate with the firstthrough hole in the radial direction; an angular bisector of an included angle formed by the center lines of the two second through holes is collinear with the center line of the third through hole,and an included angle between the angular bisector and the center line of the third through hole is 180 degrees; the two fixed measuring rods are installed in the two second through holes respectively, and measuring heads of the fixed measuring rods extend into the first through hole to contact with two adjacent tooth grooves of the gear to be detected; and the dial indicator is installed in the third through hole, and a measuring head of the dial indicator extends into the first through hole to contact with the tooth groove in the tooth axis symmetry position between the two adjacent tooth grooves.

Description

technical field [0001] The invention belongs to the detection technology of gear dedendum circle diameters, and in particular relates to a checking tool and method for detecting the dedendum circle diameters of odd-numbered gears. Background technique [0002] The diameter tolerance of the dedendum circle of most gear parts is relatively large, generally above 0.3mm. At present, the dedendum circles of even-numbered teeth are mostly detected by universal measuring tools such as vernier calipers; the dedendum circles of odd-numbered teeth cannot be directly measured, and most of them are converted and calculated after measuring the dedendum across odd-numbered teeth. Similar detection methods are only applicable to tolerances Parts above 0.3mm. [0003] In recent years, with the extensive application of technologies such as full tooth surface grinding, the tolerance requirements for the diameter of the root circle have become more and more stringent, such as figure 1 As sho...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the existing process of detecting the root circle diameter of odd-numbered gears with small tolerance is relatively cumbersome and the detection efficiency is low, the present invention provides a checking tool and method for detecting the root circle diameter of odd-numbered gears

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