Gearbox applied to high-speed wheel excavator

Abstract

The invention relates to a gearbox applied to a high-speed wheel excavator. The gearbox comprises a box body part, an input part, an output part, a front axle part and a lubricating system and is characterized in that the lubricating system is located in the box body part, the input part is driven by four hydraulic motors, the input part and the output part are directly driven through gears, and the front axle part controls power output and interruption through a shifting fork; the lubricating system is combined by a forced lubricating system and splash lubricating system, the forced lubricating system comprises inner oil channels arranged in the box body and box cover of the box body part, the inner oil channels are connected with an external oil pump through a threaded hole, lubricatingoil is pumped into the inner oil channels, and the inner oil channels are communicated with a front axle support bearing, an input output support bearing, a shifting fork slide sleeve and a gear meshing point; splash lubricating is achieved through gear oil stirring and oil-collecting-groove guiding, and the splash lubricating system is communicated with a bearing through oil holes in a spacing ring to lubricate the bearing. The gearbox is simple in structure, capable of increasing the highest advancing speed of the wheel excavator, capable of increasing the transition efficiency of the wheelexcavator.

Description

technical field [0001] The invention relates to a gearbox applied to a high-speed wheeled excavator, belonging to the technical field of power transmission. Background technique [0002] Wheeled excavators are called wheel excavators for short, and they get their name because they use tires as the way of walking. The advantage of wheel excavation is that it can quickly transition from a long distance, and the faster the walking speed, the higher the efficiency. Taking the common 20-ton wheel excavator as an example, the maximum traveling speed of most foreign countries is 25-40km / h, and most of the domestic ones are 20-35km / h. A domestic manufacturer's 20-ton wheel excavator can reach a maximum of 50 km / h (the following high-speed State refers to greater than 50km / h). One of the key reasons limiting the further improvement of the walking speed and transition efficiency of the wheel excavator is that the service life of the existing wheel excavator gearbox will be greatly r...

AI Technical Summary

Problems solved by technology

[0003] 1. Lubrication system: Splash lubrication is often used in wheel excavator gearboxes, which cannot meet the lubrication requirements of key parts such as bearings, gears, and shift forks under high-speed conditions

[0004] 2. Noise: In the high-speed state of the existing wheel excavator gearbox, the gear meshing stability is greatly reduced, resulting in excessive noise and affecting the user's operation

[0005] 3. Sealing: Conventional oil seals are mostly used in existing wheel-excavation gearboxes. Under high-speed conditions, the linear speed of the oil seal will reach 16m / s or more, and the service life of the oil seal will be greatly shortened.

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