Spherical shape gauge for bevel planet gear

Abstract

The invention discloses a spherical shape gauge for a bevel planet gear. The spherical shape gauge for the bevel planet gear comprises a cavity plate and a mandrel. The cavity plate is axially provided with three concentric conjoined cavities. The top of the cavity plate is provided with a spherical cavity, the bottom of the cavity plate is provided with a process hole, and a middle axial through hole of the cavity plate penetrates through the spherical cavity and the process hole. The mandrel is a cylindrical shaft inserted into the axial through hole of the cavity plate, the top segment of the mandrel is exposed from the spherical cavity of the cavity plate, and accordingly an axial positioning rotary structure for workpieces to be measured is formed. The area of contact of the spherical surface of the workpiece with the cavity plate can be displayed better during detection by pre-coating the spherical surface of the workpiece and inserting the workpiece on the mandrel to rotatably positionally contact with the cavity plate, and the quantity of the contact area can be determined according to color loss of the spherical surface by demounting the workpiece. The spherical shape gauge is high in detection precision and efficiency in positioned detection, and can objectively reflect actual mass of the workpiece.

Description

technical field [0001] The invention relates to a checking tool for coloring and measuring the contact area of ​​mating surfaces of mechanical parts, in particular, the invention relates to a spherical shape checking tool for planetary bevel gears. Background technique [0002] The back of the planetary bevel gear in the automotive differential is a spherical surface, and the contact area between the spherical surface and the mating surface is one of the quality indicators for evaluating the planetary bevel gear. In order to achieve the spherical processing quality of planetary bevel gears, CNC lathes are widely used in this industry for cutting and forming. Although the batch processing quality of CNC lathes is stable, the expected design accuracy can be fully achieved. However, the detection of the contact area between the planetary bevel gear and the mating surface cannot be less. The prior art adopts planetary bevel gear and concave die running-in detection, which has a...

AI Technical Summary

Problems solved by technology

However, the detection of the contact area between the planetary bevel gear and the mating surface cannot be less

The existing technology adopts planetary bevel gear and concave die running-in detection, which has a simple structure, easy detection, and can achieve effective detection, but the detection quality stability is poor

The reason is that the existing technology lacks a central axis positioning structure between the planetary bevel gear and the die, which is prone to shifting during the running-in of the pair, and the contact area after running-in cannot truly reflect the actual matching situation

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