A walking control system of a small road milling machine

Abstract

The invention relates to a traveling control system, in particular to a traveling control system which is particularly applicable to a small-sized pavement milling machine, and belongs to the field of an electric-hydraulic control system of a traveling machine. The small-sized pavement milling machine traveling control system comprises a traveling pump, a diverting valve, a control valve blank, a high-speed motor and two low-speed motors, wherein the traveling pump conveys the hydraulic oil respectively to the low-speed motors and the high-speed motor in parallel connection through the diverting valve, and then the hydraulic oil is returned to the traveling pump to form a closed loop. The small-sized pavement milling machine traveling control system is characterized in that by adopting the parallel connection way of the high-speed motor and the two low-speed motors, a rear wheel does not need to be connected with a reducer, so that the axial size of the rear wheel is reduced, the entire design is optimized, the swinging of the rear wheel is not influenced, and the rear wheel is more applicable to the small-sized pavement milling machine; meanwhile, the sufficient driving force also can be guaranteed, and the milling requirement of the milling machine can be met.

Description

technical field [0001] The invention relates to a walking control system, which is especially suitable for a walking control system of a small road surface milling machine, and belongs to the field of electro-hydraulic control systems of walking machines. Background technique [0002] Road milling machine is a special mechanical equipment for highway and urban road maintenance. It is mainly used for excavation and renovation of asphalt concrete surface layers such as highways, airports, docks, parking lots, etc., asphalt pavement rutting, cracks, carbuncles, road markings, etc. The removal of road surface diseases, the roughening of the cement pavement and the milling of the staggered surface layer; and the small road surface milling machine can also be used for excavating pits, drains, and the layout of indoor and outdoor cables. In the prior art, the traveling drive system of the milling machine adopts two gears for speed regulation, which are divided into working gear and...

AI Technical Summary

Problems solved by technology

However, for small road milling machines, if the front and rear wheels are driven by high-speed motors, the high-speed motor needs to be connected to a reducer to drive the tires, and such a solution will lengthen the axial dimension of the tires, which is not conducive to small road milling machines. Structural arrangement, especially the rear wheels need to swing, too long axial dimension is not conducive to the swing of the rear wheels; but if only high-speed motors are installed on the front wheels, the rear wheel drive is cancelled, so that the rear wheels are only rubber wheels for free wheels , such a scheme will reduce the traction force and fail to meet the power required for milling work

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