A low-floor gantry drive axle

Abstract

The invention provides a light low floor door type drive axle for a passenger car. The drive axle comprises a main reducer assembly, wheel reducer assemblies, a wheel brake assembly, a C-shaped beam and an axle shell assembly, wherein the main reducer assembly is arranged in the axle shell assembly; the two ends of the axle shell assembly are respectively connected with the wheel reducer assemblies; and the wheel reducer assemblies are connected with the wheel brake assembly and the C-shaped beam. The low floor door type drive axle adopts a brand new design method of combining the transmission analysis with the finite element analysis to innovate and improve the drive axle on such multiple aspects as a main reducer shell, an axle shell, a wheel reducer box, a spindle head and a hub, so that the gravity center of the whole axle is effectively lowered, the use requirement of the light low floor door type drive axle for the passenger car is satisfied, the comfort, the convenience and the safety of passengers taking and getting on or off the car are guaranteed, the driving stability of the passenger car is guaranteed, and the targets of light design and longer service life are realized while improving the support rigidity and strength of the drive axle.

Description

technical field [0001] The invention relates to the technical field of automobile axles, in particular to a low-floor portal drive axle for passenger cars. Background technique [0002] With the improvement of road conditions in our country and more and more people choosing public transportation, the design of drive axles for passenger cars has irreversibly developed towards small speed ratio, low noise, light weight, and high efficiency. It is comfortable, safe, environmentally friendly, and efficient. Energy saving and energy saving have gradually become the mainstream trend in the development of passenger cars. The drive axle assembly is located at the end of the automobile transmission system, and its basic function is to reduce the speed transmitted from the main drive shaft, increase the torque transmitted from the drive shaft, distribute the torque to the left and right drive wheels, and make them It has a differential function, and at the same time bears the vertica...

AI Technical Summary

Problems solved by technology

Since passenger cars, especially city buses, have the characteristics of dense stations and frequent passengers getting on and off during operation, the height of the interior floor of passenger cars is directly related to the convenience, comfort and safety of passengers riding, getting on and off, especially for the elderly. , the disabled, mothers with baby carriages, passengers with luggage and other special groups require the interior floor of the bus to be as low as possible. However, most of the existing drive axles for passenger cars have no drop, and the center of gravity of the entire bridge is relatively high, resulting in The floor is relatively high, which cannot meet the requirements of special people for the convenience, comfort and safety of riding, getting on and off the bus, and also affects the driving stability of the bus. At the same time, the main reducer housing, differential housing, The design of key components such as the axle housing and the hub is bulky and the structure is too complicated, which also increases the difficulty of layout and increases the cost

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