With China's rapid economic development, types of goods being enriched, producing and marketing the distance farther. People demand more and more logistics, logistics in the entire production and marketing position in the continuously increasing. Efficient, low-cost, on-time Logistics will be the people to pursue the direction. With labor costs and rising fuel prices, long-distance logistics will be more inclined to efficient single-stage heavy-duty drive axle truck. Single Reduction Drive Axle advantages: it is a simple structure and manufacturing process the most simple, low cost drive axle. Two studies in this paper the passive gear drive axle is an efficient, stable, high-torque of the new single-stage reduction driving axle. This paper gives a double passive gear reducer drive the overall structure of the bridge, and part of the detailed design of the study, especially on the inside of the main gear of a pair of cylindrical gear pairs for the parameters of the model, and this Gear for the tooth root bending strength and intensity of tooth contact analysis. This article mainly as follows: (1) design a dual passive gear reducer drive the overall structure of the bridge. Describes a dual passive gear drive axle structure and its structural features, discusses the dual passive gear drive axle works and how to double the output torque, the two discussed how to achieve passive bevel gear differential and differential speed of the structure form and supporting forms.(2) design of the drive axle of the main gear. Design of the structure of the main gear and main gear in the form of active and passive form of bevel gear bearing and details of the final drive spur gear bevel gear pair and hypoid Vice basic parameter selection, and an overview of the damage in the form of gear, but also conducted on the cone gear strength check. (3) a comprehensive exposition of the use of CATIA modules related to the design of involute spur gear on the parametric modeling method, created CATIA involute cylindrical gear standard parts library, making the modeling of involute spur gear once and for all, and gear contact model assembled for easy import into ANSYS, ADAMS and other related software modules and dynamic structural analysis of kinematics module for analysis. (4) We must ensure that the service life of gears can be scheduled to work properly, you need to ensure that the gear tooth root has a bending resistance and the contact tooth surface with a certain intensity. This article is based on ANSYS software to the tooth root strength and the strength of the gear tooth contact were analyzed. Include: a simplified model and into gear, cell attributes defined by the grid, the load applied, create contacts, and solve the conclusions of the analysis.
Key words: double passive gear drive axle, main reducer, gear parametric modeling, tooth root bending strength, tooth surface contact strength
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