A small modulus gear backlash detection method

Abstract

The invention discloses a method for measuring the backlash of small modulus gears. The driven gear is rotated to the state where the test surface is horizontal, and the initial angle θ is determined. 0 is 90 degrees, and the probe of the dial gauge is vertically against the test initial point on the surface of the above-mentioned test surface, and the position data of the test initial point is recorded as (x 0 ,y 0 ), so that the value of the dial gauge returns to zero, at this time y 0 =R, turn the driven gear until one surface of the driven gear meshes with the driving gear, record the current data △y of the dial indicator, and substitute the known parameters R and θ into the formula 0 , Δy, x 0 , get the normal inclination angle θ of the test surface 1 ; Then by knowing the radius of the gear pitch circle as r, measure the gear backlash l: l=r·|θ 1 ‑θ 0 |, the present invention does not need to extend the probe of the dial indicator into the gear gap, and can accurately measure the gear backlash of small modulus, the realization method is simple and convenient, does not require too many auxiliary test tools, and there are few parameters to be tested. The cost is lower.

Description

technical field [0001] The invention belongs to the field of gear detection, and in particular relates to a method for measuring the backlash of small-modulus gears. Background technique [0002] During gear meshing transmission, in order to form a lubricating oil film between the meshing tooth profiles and avoid being stuck due to the friction and heat expansion of the gear teeth, a gap must be left between the tooth profiles. In order to ensure the formation of a normal lubricating oil film between the tooth surfaces and prevent the gear teeth from being stuck due to thermal expansion and deformation caused by the increase of the working temperature of the gear, the gear teeth must have appropriate backlash during meshing. Therefore, in the gear detection project, it is often necessary to detect the backlash of the gear to ensure the normal transmission of the gear. [0003] At present, the conventional gear backlash detection method is to fix one of a pair of meshing tee...

AI Technical Summary

Problems solved by technology

In this assembled gear pair, the method of fixing one gear and then measuring the circumferential sway of the other gear (in terms of the arc length on the indexing circle) has the existence that when the gear modulus is small, the gear tooth spacing is small, and the distance between the gear teeth is small. The meter probe is relatively large and cannot be inserted into the gear gap, or it can be inserted but the tooth surface is small, and it is impossible to accurately measure the runout at the indexing circle. Therefore, a method that can accurately measure the backlash of small modulus gears is needed

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