Drive axle double-speed reducer with planetary structure

Abstract

The invention discloses a drive axle double-speed reducer with a planetary structure, and belongs to the technical field of automobile drive axles. The reducer comprises a reducer shell, a fixed meshing sleeve, a driven bevel gear, a sliding meshing sleeve, a planetary gear assembly, a bevel gear shell, a driving bevel gear assembly, a driven cylindrical gear and a driving bevel gear. The reduceradopts a double-speed reducer structure, when a commercial automobile is fully loaded, a large speed ratio is adopted to increase driving torque; when the commercial automobile is in zero-load, a small speed ratio is adopted to increase driving speed; and through the reasonable arrangement of the speed and the torque, the oil consumption is reduced, and the efficiency is improved. A planetary gearset structure is adopted, based on the double-speed reduction principle of a planetary bevel gear structure, the switching between one time reduction ratio and two times reduction ratio can be achieved; the shaft diameter of the driving bevel gear is used for radially positioning a cross shaft and the driven bevel gear; the sliding meshing sleeve adopts double-face end face teeth and is used forswitching between the two speed ratios; and through a driving cylindrical gear and an end face tooth structure, the two functions of transmission and speed change are realized.

Description

technical field [0001] The invention belongs to the technical field of automobile driving axles, and in particular relates to a double-speed reducer for driving axles with a planetary structure. Background technique [0002] Domestic commercial vehicle drive axles mostly have a single speed ratio structure, which often has the following disadvantages: when the full-load torque meets the requirements, the no-load speed is insufficient; or when the no-load speed meets the requirements, the full-load torque is insufficient. In order to meet the torque requirements at full load and the speed requirements at no-load at the same time, thereby achieving the purpose of improving efficiency and reducing energy consumption, it is urgent to develop a drive axle with two speed ratios, that is, use a large speed ratio at full load and use a high speed ratio at no-load. Switch to use a small ratio. Contents of the invention [0003] The purpose of the present invention is to solve the ...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of insufficient driving torque when the commercial vehicle is fully loaded due to the single speed ratio in the existing drive axle; low driving speed, high fuel consumption, and low efficiency when the commercial vehicle is unloaded.

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