Pitch variation measuring device for large-size straight toothed spur gear

Abstract

The invention relates to a pitch variation measuring device for a large-size straight toothed spur gear, which comprises a front positioning element 11, a rear positioning element 12, a center distance measuring gauge outfit 13, a radial measuring gauge outfit 14, a lever mechanism 16 and a body 15, wherein the center distance between the front positioning element 11 and the rear positioning element 12 can be changed and measured by the center distance measuring gauge outfit 13. When measurement is carried out, the front positioning element 11 and the rear positioning element 12 are respectively clamped between two teeth of a measured gear, and the radial measuring gauge outfit 14 contacts with the addendum circle or dedendum circle of the measured gear, so that the readings of the center distance measuring gauge outfit 13 and the radial measuring gauge outfit 14 at the time can be read. In such a way, the pitch variation of the measured gear can be calculated according to the obtained readings around a circle of the measured gear. Compared with the traditional pitch measuring instrument based on different principles, the pitch variation measuring device disclosed by the invention has the characteristics of easiness for operation, stable contact, good repeatability, and the like, ensures the measurement accuracy and can be used for measuring the pitch variation of two side tooth surfaces simultaneously obtained once.

Description

technical field [0001] The invention relates to a measuring instrument for pitch deviation of large spur gears, which belongs to the field of length measurement. Background technique [0002] Tooth pitch deviation is related to the transmission accuracy and stability of gear work, and is an important gear precision parameter. Tooth pitch deviation is usually measured with a tooth pitch meter (peripheral pitch meter), which uses two feet to position the addendum circle or root circle of the gear under test, and at the same time makes a fixed jaw and a tooth of the gear under test Surface contact, the other active claw contacts the tooth surface on the same side of the adjacent tooth, a gauge indicates the change in the position of the active claw, and the tooth pitch deviation can be obtained through certain data processing. Because two feet and a fixed claw are required to be in contact with the gear under test at the same time, and the contact state is unstable, the operat...

AI Technical Summary

Problems solved by technology

Because two feet and a fixed claw are required to be in contact with the gear under test at the same time, and the contact state is unstable, the operation needs to be very careful, and large gears usually have a large number of teeth, a large module, and a heavy instrument, so the repeatability of the measurement results is often Very poor, measurement accuracy cannot be guaranteed

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