Wet type braking drive axle

Abstract

The invention discloses a wet type braking drive axle. An axle housing, an input assembly, a first brake assembly, a first half shaft, a first hub assembly, a second half shaft, a second brake assembly and a second hub assembly are included. The second brake assembly and the first brake assembly are the same in structure. The input assembly is arranged on the axle housing. The first brake assemblyis located at the left end of the axle housing. The right section of the first half shaft is connected with the input assembly. The first half shaft penetrates through the first brake assembly. The second brake assembly is located at the right end of the axle housing. The left section of the second half shaft is connected with the input assembly. The second half shaft penetrates through the second brake assembly. The first brake assembly and the second brake assembly can compensate for abrasion of a friction plate, and the service life of the friction plate is prolonged. The input assembly isprovided with a buffering mechanism, influences caused on a speed changer from drive axle vibration can be effectively reduced, and the service life of the drive axle is prolonged.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a wet brake drive axle. Background technique [0002] As we all know, the operating conditions of construction machinery are relatively harsh. At present, the domestic construction machinery axle product market is still dominated by dry brake drive axles, and dry drive axles use external dry brakes, which causes dry The type 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, basically not affected by environmental factors, the service life is long, and the braking is safe and reliable. It has been widely used in existing construction machinery. [0003] In the prior art, there is a precedent for applying wet brake drive axles to forklifts. For example, the Chinese patent document with the publication number CN107265354A discloses a fo...

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Problems solved by technology

[0002] As we all know, the operating conditions of construction machinery are relatively harsh. At present, the domestic construction machinery axle product market is still dominated by dry brake drive axles, and dry drive axles use external dry brakes, which causes dry The type 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, basically not affected by environmental factors, the service life is long, and the braking is safe and reliable. It has been widely used in existing construction machinery

[0003] In the prior art, there is a precedent for applying wet brake drive axles to forklifts. For example, the Chinese patent document with the publication number CN107265354A discloses a forklift driving and parking integrated wet brake drive axle, including input assembly, bridge Housing, first half shaft, second half shaft, spline sleeve and fixed ring gear, as well as the first brake assembly and the second brake assembly located in the axle housing, this patent effectively solves the problem of the original dry system Poor braking stability and inconvenient maintenance caused by dynamic movement. In this patent document, the friction plate and spacer can be maintained and replaced without dismantling the axle housing, but it is inevitable that the friction plate will be damaged during use. The friction plate becomes thinner due to wear, thereby reducing the braking force of the brake. In order to ensure driving safety, when the friction plate wears to a certain extent, it is no longer of use value, resulting in high maintenance costs for the friction plate. low life

[0004] In addition, the power of the existing wet brake drive axle is often provided by the transmission, so the vibration transmitted from the hub on the drive axle is easily transmitted to the transmission, and when the transmission body is subjected to the vibration, it will cause the car to vibrate. Vibration and noise of varying degrees, and the vibration of the gearbox body can easily cause damage to the internal parts of the transmission. Therefore, in the Chinese patent document with the publication number CN109185420A, the transmission shaft is arranged between the transmission input shaft and the drive axle. This prevents the transmission from being directly connected to the transaxle, but this reduces the efficiency of the transmission and increases the size and cost of the wet brake transaxle

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