Prototype gear and measurement method thereof

Abstract

The invention provides a prototype gear and a measurement method of the prototype gear. The prototype gear comprises two half tooth prototype gears, gear teeth of which are unilateral tooth surfaces; the half tooth prototype gears are coaxially arranged and are matched with each other to form a full tooth prototype gear; one of the two half tooth prototype gears is a fixed half tooth prototype gear which is fixedly connected with a shaft; the other half tooth prototype gear is a movable half tooth prototype gear which is connected with a shaft sleeve; a relative micro angular momentum is formed between the fixed half tooth prototype gear and the movable half tooth prototype gear. During measurement, when the fixed half tooth prototype gear is in single-surface meshed transmission with one gear surface of a product gear, the movable half tooth prototype gear keeps micro force contact with the other gear surface of the product gear under the action of a micro torque. According to a non-backlash transmission theory of a gear pair and the measured relative angular momentum between the fixed half tooth prototype gear and the movable half tooth prototype gear, a tangential comprehensive deviation and a radial comprehensive deviation of the two gear tooth surfaces can be acquired through a single surface mesh measurement; the prototype gear has the advantages of high measuring precision and reliability in results; and measuring efficiency is obviously improved, and investment to measuring equipment is reduced.

Description

Technical field [0001] The invention relates to a gear measuring technology, in particular to a measuring gear used for single-sided and double-sided meshing measurement of gears and a measuring method thereof. Background technique [0002] Gears are widely used transmission parts. The quality of gears is the main factor that affects the transmission quality of the gear pair and the performance of the whole machine. The measurement principle of gear single-sided meshing measurement and gear double-sided meshing measurement is simple, and the measurement process is dynamic and continuous and close to the use of gears. Condition, high measurement efficiency, and non-strict environmental requirements are common inspection methods for gear quality. The measuring gear refers to a standard gear with ideal and precise tooth profile. It is a key part of gear single-sided meshing measurement and gear double-sided meshing measurement. Gear single-sided meshing measurement. The product gea...

AI Technical Summary

Problems solved by technology

[0003] At present, both the single-side meshing measurement and the double-side meshing measurement of the gear realize the detection of the product gear through the meshing transmission of the product gear and the measuring gear, and the measurement process is dynamic and continuous, and the measurement efficiency is high. During the measurement process, the center distance and meshing state of the product gear and the measuring gear are different, and the measurement mechanism and measured physical quantity are also different. Therefore, the single-sided meshing measurement and double-sided meshing measurement of the gear are respectively performed by two different measuring instruments (single-sided meshing measurement) Surface engagement measuring instrument and double-sided engagement measuring instrument) to measure, so far, there is no measuring instrument that can realize both single-sided engagement measurement and double-sided engagement measurement

In addition, with the existing single-sided meshing measuring instrument and its measuring gear, one measurement process can only obtain the tangential comprehensive deviation curve of one side of the product gear tooth surface. To obtain the tangential comprehensive deviation curve of the product gear tooth surface on both sides must Perform secondary measurement, measurement efficiency is still low

Third, in order to ensure that the measuring gear can be in contact with the entire effective tooth profile of the product gear during the double-sided meshing measurement process, and not in contact with the non-effective dedendum part of the product gear, the tooth height of the measuring gear for double-sided meshing measurement and tooth thickness need to be precisely designed, the measuring gear generally cannot be used for single-sided meshing measurement, because the center distance of the single-sided meshing of the product gear and the measuring gear is always different from the center distance of the double-sided meshing (the former is always greater than the latter in the case of external meshing, and the center distance of the internal The former is always smaller than the latter when meshing), if the measuring gear designed for double-sided meshing measurement is used for single-sided meshing measurement, it will not be guaranteed that the measuring gear is in contact with the entire effective tooth profile of the product gear

[0004] To sum up, single-sided meshing measurement and double-sided meshing measurement of gears are two commonly used gear measurement methods. At present, these two measurements must be carried out with two different measuring instruments; the measuring gear used in the two measurements It needs to be designed separately and cannot be used universally; moreover, the current single-sided meshing measurement needs two single-mesh transmissions to complete the measurement of a gear, and the detection efficiency is low

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