Measuring instrument for scaling tooth crest runout at equal proportion

Abstract

The invention discloses a measuring instrument for scaling tooth crest runout at an equal proportion. The measuring instrument comprises a base seat, a measuring rod, a dial gauge and a measuring rotating shaft; one end of the measuring rod is hinged onto the base seat to enable the measuring rod to swing around a hinge point; the other end of the measuring rod is a free end; the measuring rotating shaft is fixed on the base seat, the measuring rotating shaft is located on one side of the measuring rod; the measuring rotating shaft is tangent to the measuring rod; the dial gauge is fixed on the base seat, and a measuring head of the dial gauge is in contact with the measuring rod when the measuring rod swings. Via use of the measuring instrument disclosed in the invention, a principle thatlever displacement can be amplified and reduced, tooth crest circle runout relative to a fixed reference which cannot be directly measured is scaled at a certain proportion, and linear displacement which can be directly measured is obtained. Via application the design principle of this measuring instrument, tooth crest circle runout of any toothed wheel relative to the reference can be measured,and the measuring instrument is easy to operate and reliable in measuring structure.

Description

technical field [0001] The invention relates to a measuring tool for gear detection, in particular to a measuring instrument for tooth top runout relative to a reference. Background technique [0002] Radial runout belongs to the position tolerance, which means that the measured actual element rotates around the reference axis for one revolution without axial movement, and the maximum and The difference between the minimum indications. Gear addendum runout is an important index to measure gear accuracy. [0003] Our company mainly produces high-speed rail ticketing equipment. In the core products, multiple sets of gears and timing belts are used as transmission methods. In this transmission mode, the excessive runout of the addendum circle has always been an important factor affecting the key functions of our key products. It is mainly manifested in the fact that the driving gear transmits power to the driven gear through the belt, and the two gears drive the rubber roller...

AI Technical Summary

Problems solved by technology

In this transmission mode, the excessive runout of the addendum circle has always been an important factor affecting the key functions of our key products. It is mainly manifested in the fact that the driving gear transmits power to the driven gear through the belt, and the two gears drive the rubber roller to drive the high-speed rail at the same time. The magnetic process of reading and writing train tickets requires a uniform transmission speed. If the runout of the tooth top circle is out of tolerance, the driving gear will move in an elliptical manner, and the power will be transmitted to the driven gear through the belt, resulting in rubber driven by the gear. The rollers rotate irregularly, causing the train ticket to fail to meet the requirements of uniform speed, which leads to the failure of reading and writing magnetic

[0004] Due to the above reasons, our company has been looking for means to detect the runout of the addendum circle, but has not found a general-purpose equipment suitable for detecting this indicator. The current detection instruments for the runout of the gear addendum circle, such as three-coordinate measuring instruments, have wide applicability. However, there is a problem of low efficiency in the detection of tooth tip runout, and at the same time, the purchase and maintenance costs of this type of equipment are high

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