Drive axle and service brake assembly thereof

Abstract

The invention discloses a drive axle and a service brake assembly of the drive axle. The drive axle comprises a first shaft sleeve positioned in a second shell, an annular piston, a plurality of annular first outer friction plates and a plurality of annular first inner friction plates, and the first shaft sleeve is in transmission fit with an axle shaft through an inner spline; the plurality of annular first inner friction plates and first outer friction plates are alternately stacked, and the piston is installed on the second shell and can move between a braking position and a non-braking position; elastic check rings are further arranged, axial spline grooves and circumferential annular grooves are formed in the outer surface of the first shaft sleeve, a plurality of first mounting grooves are formed in the inner side wall of the second shell, and the first outer friction plates are clamped in the first mounting grooves; and the first inner friction plates are clamped in the spline grooves and then are in transmission connection with the first shaft sleeve, and the elastic check rings are clamped in the annular grooves and located between any two adjacent first inner friction plates. According to the technical scheme, axial positioning of the first shaft sleeve can be completed, and installation of the whole service brake assembly is facilitated.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a drive axle and a service brake assembly thereof. Background technique [0002] As we all know, the working conditions of construction machinery are relatively bad. At present, the domestic construction machinery axle product market is still dominated by dry brake drive axles, while dry drive axles use external dry brakes, which causes The dry drive axle is greatly affected by environmental factors such as humidity, freezing, sand and dust, the braking performance is unstable, and the service life is short; the wet brake is built-in, which is basically unaffected by environmental factors, with long service life and safe braking. Reliable and widely used in existing construction machinery. [0003] In the prior art, there is a precedent for applying a drive axle to a forklift. For example, a Chinese patent document with publication number CN107265354A discloses an integrated...

AI Technical Summary

Problems solved by technology

[0008] 2) The friction plate in the service brake assembly is directly installed on the half shaft. Although this setting facilitates the installation of the friction plate, it makes the installation of the half shaft difficult, and makes the opening of the housing larger, and then The structure of the hub assembly is complicated and the transmission relationship with the half shaft will be more complicated;

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