New dual power full hydraulic excavator

Abstract

The invention relates to engineering machinery, in particular to a novel double-power fully-hydraulic excavator. At present, the problems of more gearbox dragging belts, high power consumption, unreasonable structure of a connecting part of a power output shaft and the like exist in an oil-electric hybrid excavator. The front end of an output shaft of a power system is connected with the rear end of a power output shaft of an electromotor through a centrifugal clutch; a rotating shaft of an internal combustion engine fan is in transmission connection with an internal combustion engine through the centrifugal clutch; the power system comprises an auxiliary motor; a wire coil is arranged at the tail part of a vehicle frame, and a wire coil motor is arranged on a hydraulic circuit of a travel motor. The novel double-power fully-hydraulic excavator provided by the invention has the benefits that the equipment has two kinds of power, namely oil and electricity, adopts series power and is compact in structure and convenient to switch, and the performance of the equipment is obviously improved. Through perfecting the good switching of the power system, the normal operation under different power supply is realized.

Description

technical field [0001] The invention relates to a construction machine, in particular to an electric-oil hybrid excavator. Background technique [0002] An excavator is one of the most important construction machinery in engineering construction. It is a mechanical device that excavates materials through a bucket and loads them into transport vehicles or unloads them to the stockyard. In the past, excavators were powered by diesel engines. Due to the high oil price, high noise and smoke of diesel engines, and serious pollution of the working environment, many excavators were driven by electric motors. However, in the case of being far away from the power source, a diesel engine is also needed as power, so some excavators are equipped with two sets of power, a diesel engine and an electric motor, and become a hybrid power of gasoline and electricity. Among such hybrid excavators, diesel engines and electric motors are mostly installed in series. That is, the power output sh...

AI Technical Summary

Problems solved by technology

[0003] Experimental observation found that there are two problems with the above-mentioned gasoline-electric hybrid excavator. One is that the gearbox drags multiple components and consumes a lot of power.

Second, the structure of the connection part of the power output shaft of the electric motor and the diesel engine is unreasonable, and the energy consumption is relatively high

The disadvantage of this method is high energy consumption, and the advantage is that the fan of the diesel engine can work as usual

The second is manual clutch. The advantage is that it can reduce power consumption. The disadvantage is that it cannot be switched automatically. The clutch is laborious. After separation, the fan stops rotating and the heat dissipation performance is poor.

The third is to connect through a one-way clutch, which can be switched automatically, but there is still a lot of friction after separation, and some power needs to be spent, and the clutch wears out quickly, and there is also the problem that the fan does not turn after separation.

The above disadvantages limit the popularity and application of hybrid excavators

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