High-precision standard eccentric shaft with adjustable eccentric distance

Abstract

The invention discloses a high-precision standard eccentric shaft with an adjustable eccentric distance. The eccentric shaft comprises a main shaft; one side of the main shaft is provided with an external thread section, and the other side of the main shaft is provided with a shaft shoulder; the external thread section is sleeved with a gasket and a locknut which can be screwed on the external thread section; two inclined planes are located between the external thread section and the shaft shoulder, form an angle of 60 DEG and are a same distance away from a central axis and symmetrical with a shaft body; a shaft sleeve, an isolation sleeve and another shaft sleeve are successively sleeved between the shaft shoulder and the gasket; the spindle sleeves are in the shape of rings, two planes forming a 60-DEG angle are arranged in the rings, the two planes respectively match with the two inclined planes of the main shaft, and a pair of replaceable standard-thickness blocks with same height are respectively arranged in a corresponding plane and a corresponding inclined plane. According to the invention, accurate adjusting of the eccentric distance can be realized; through changing of the standard-thickness blocks, a desired standard eccentric distance can be obtained, and influence of manual adjusting can be eliminated; and on a same standard eccentric shaft, rapid measurement and calibration can be realized, and the standard eccentric shaft has a simple and reliable structure.

Description

technical field [0001] The invention relates to a high-precision standard eccentric shaft with adjustable eccentricity. The standard eccentric shaft is mainly used for detection and calibration of crankshafts and eccentric shaft measuring instruments. Background technique [0002] The production technology of mechanical transmission parts such as crankshaft and camshaft has been relatively perfect at home and abroad, and various measuring instruments and equipment are relatively mature abroad, and the calibration technology of such instruments is relatively perfect abroad. At present, there is no corresponding complete standard appliance in China. [0003] In the current detection and calibration of crankshaft and camshaft measuring instruments, the standard mandrel is installed between the two tops, and the parallelism between the axis and the measuring carriage and the coaxiality of the two tops are measured; then the standard eccentric shaft and the standard The standard...

AI Technical Summary

Problems solved by technology

For the traditional standard eccentric shaft, it is realized by the adjustment mechanism composed of eccentric teeth or eccentric cam. This solution often makes it difficult to meet the accuracy requirements of eccentricity, and it is difficult to find the highest and lowest points of positive eccentricity in the same center. Online, and often only a single location of the instrument can be tested and calibrated

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