Full-automatic measuring instrument for controlling gear M value by divided teeth

Abstract

The invention relates to the technical field of measuring equipment and particularly relates to a measuring instrument for a small modulus gear M value. The measuring instrument comprises an assembling shaft system, a measuring mechanism, a rail mechanism and a base, wherein the measuring mechanism is arranged on the rail mechanism; the rail mechanism is arranged on the base; the assembling shaft system is arranged on the base; the assembling shaft system is driven to rotate by a motor; a to-be-measured gear is arranged at the upper end of the assembling shaft system; and the measuring mechanism comprises an X directional parallel leaf spring mechanism and a Y directional parallel leaf spring mechanism. According to the invention, a common alternating current servo motor can be adopted for achieving an indexing function; the measuring speed is high; no precise circular grating is required; the cost is lowered; use and maintenance are convenient; the measuring instrument is suitable for the working condition of domestic gear batch production at present, can meet the requirement of quick gear comprehensive check, can comprehensively control the gear quality, can be used for measuring the gears of other modulus and can effectively increase the production efficiency.

Description

technical field [0001] The invention relates to the technical field of measuring equipment, in particular to an instrument for measuring the M value of small modulus gears. Background technique [0002] Tooth thickness is an important parameter in gear design and manufacture. Tooth thickness that does not meet the design requirements may cause a series of fit problems such as tooth bite during assembly. In gear transmission, in order to ensure the backlash of the gear pair, it is necessary to control the tooth thickness of the gear during processing. Therefore, the measurement of tooth thickness is very important. At present, there are four methods for measuring the tooth thickness of involute cylindrical gears: common normal length, graduated circular chord tooth thickness, fixed chord tooth thickness, and round bar (ball) span M value. The common normal length is mostly used in the measurement of small and medium gears, and the chord tooth height and chord tooth thicknes...

AI Technical Summary

Problems solved by technology

The invention establishes the coordinate relationship between the measuring head and the center of rotation of the gear under test, and proposes to obtain the M value of the gear under test in the form of "radius", measure the tooth thickness of each tooth of the gear one by one, and generate the tangential force direction of the gear under test. The error is compensated to the direction of the radial force, which accurately reflects the tooth thickness change of the measured gear, and solves the problem of low measurement accuracy and work efficiency in the traditional way under the condition of mass production. At the same time, the tooling shaft system in the instrument only needs to use Ordinary AC servo motors can accurately realize the indexing function, reducing the cost

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