Construction machinery and drive axle assembly thereof

Abstract

The invention discloses a drive axle assembly which comprises an axle housing (2), wherein a main reducer (1), a wheel reducer (3) and a half shaft (4) are arranged in the axle housing (2); two ends of the half shaft (4) are connected with the main reducer (1) and the wheel reducer (3) respectively; the drive axle assembly also comprises a brake used for braking the half shaft (4); when the brake is in a braking working condition, the brake brakes an output shaft of the wheel reducer (3); the brake of the drive axle assembly directly brakes the output shaft of the wheel reducer, so that the half shaft is braked indirectly; and the rotating speed of the output shaft of the wheel reducer is much lower than the rotating speed of the half shaft, and relatively small braking force is required, so that the braking is easier, and the stability and the safety of the braking are improved. The invention further discloses a construction machine provided with the drive axle assembly.

Description

technical field [0001] The invention relates to the technical field of vehicle braking, in particular to a construction machine and a drive axle assembly thereof. Background technique [0002] A loader is a typical construction machine. It has a drive axle assembly. The movement of the loader and the braking of the vehicle are mainly completed by the drive axle assembly. A commonly used drive axle assembly in the prior art will be introduced in detail below. . [0003] At present, the drive axle assembly mainly includes axle housing, final reducer (including differential), wheel reducer and wet brake, half shaft, oil pipe assembly and other components, final reducer, wheel reducer, half shaft set In the interior of the axle housing, the two ends of the half shaft are respectively connected with the main reducer and the wheel reducer, so that the power is transmitted from the main reducer to the wheel reducer, and then it is decelerated by the wheel reducer and then transmit...

AI Technical Summary

Problems solved by technology

[0004] The wet brake in the prior art is arranged between the ring gear of the planetary gear structure and the planetary gear frame, and directly brakes the half shaft. Since the rotation speed of the half shaft is relatively high, the braking force required for the braking force is relatively large, and the friction plate is affected. The force is relatively large, the stability of the brake is relatively poor, and the wear of the friction plate is relatively serious.

[0005] In addition, because the wet brake in the prior art is connected between the ring gear and the planetary gear carrier, there is an offset between the pressing point where the piston presses the friction plate in the wet drive and the force point where the brake pressure oil is applied to the piston, resulting in When the brake is working, the piston has to bear the action of torque and bending moment, which greatly affects the service life of the piston

[0006] Moreover, with the longitudinal arrangement of the wet brake, the operator cannot observe the wear condition of the friction plates, and cannot measure the gap between the friction plates, so that the maintenance personnel cannot judge the use status of the friction plates, and cannot measure the friction after wear. Replace the disc in time, and there is a potential safety hazard in braking

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