Hub reduction type double-speed driving axle

Abstract

The invention relates to a hub reduction type double-speed driving axle. The driving axle is characterized in that a cylinder, a pneumatic turning box, a pressure spring assembly and an end cover areadditionally arranged based on an existing structure, wherein the cylinder is fixed in a central hole of a cross axis, and a piston rod of the cylinder is connected to a semiaxis; the pneumatic turning box sleeves a right housing of a differential mechanism, and a gas sealing channel is formed in a clearance between an outer ring and an inner ring; the cylinder communicates with the gas sealing channel through a rotating gas pipe; the gas sealing channel communicates with an outer air pump through a fixed gas pipe; the end cover is fixed to the end part of a planetary carrier assembly; the pressure spring assembly is positioned between the end surface of the semiaxis and the end cover; one end, opposite to the end cover, of the semiaxis is of a double-surface end surface tooth structure; when in idle load, the cylinder is aerated, and the semiaxis axially moves until the end surface teeth in one side are engaged with end surface teeth in the inner side of the end cover; and when in full load, the end surface teeth in the other side of the semiaxis are engaged with end surface teeth of a sun wheel through the pressure of the pressure spring assembly. According to the hub reduction type double-speed driving axle, the speed and the torque are reasonably configured to decrease the oil consumption, and the efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of automobile driving axles, and in particular relates to a wheel-side reduction two-speed driving axle. Background technique [0002] Domestic commercial vehicle drive axles mostly have a single speed ratio structure, which is transmitted to the wheel hub through the active main gear→driven bevel gear→differential case→cross shaft→planetary gear→side shaft gear→side shaft→sun gear→planetary carrier assembly torque. This structure 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 l...

AI Technical Summary

Problems solved by technology

This structure 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

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