Modification Method of Reverse Driving Surface of Spiral Bevel Gear Pair of Heavy-duty Axle with Retarder Installed

Abstract

The invention discloses a reverse drive surface modification method for a spiral bevel gear pair of a heavy-duty axle with a retarder. According to offset of a loading contact area of the reverse drive surface of the spiral bevel gear pair during braking of the retarder, a reference point, a large diagonal contact trace and a transmission error curve of the reverse drive surface are designed. Large diagonal modification of the initial small wheel reverse drive surface is achieved by taking the initial large wheel reverse drive surface as a generating wheel to generate a small wheel reverse drive surface which is conjugate with the initial large wheel reverse drive surface and meets the designed large diagonal contact trace and transmission error curve. The small wheel reverse drive surfaceafter large diagonal modification is partitioned, modification is further performed according to the designed modification curve to obtain the target small wheel reverse drive surface, and finally, machine tool processing parameters corresponding to the target small wheel reverse drive surface are solved. The problem that edge contact is generated by offset of the loading contact area of the reverse drive surface of the spiral bevel gear pair after the retarder is installed is solved, and finally, working life of the spiral bevel gear pair is prolonged.

Description

technical field [0001] The invention belongs to a design method of a spiral bevel gear, and in particular relates to a method for modifying the tooth surface of a slow-speed heavy-duty axle spiral bevel gear pair in which the contact area of ​​the counter-drive surface deviates. Background technique [0002] In order to improve the driving safety and economy of heavy-duty vehicles, adding retarders to heavy-duty axles for braking has become the standard configuration of heavy-duty vehicles in developed countries, and has also been included in the national standards of vehicle safety technology in my country. However, adding a retarder to the heavy-duty axle brings new challenges to the design and manufacture of the axle spiral bevel gear pair. [0003] When the retarder is used for braking, the braking force of the retarder is directly transmitted to the counter-driving surface (convex surface of the small wheel and concave surface of the large wheel) of the helical bevel ge...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: to propose a method for modifying the counter drive surface of the heavy-duty axle spiral bevel gear pair with retarder installed, so as to solve the problem of the spiral bevel gear pair of axle reducer caused by the addition of retarder. Issues with back-driven face-loaded contact area offset, edge contact and reduced lifetime

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