Engine and construction machinery having the same

Abstract

The invention provides an engine and a construction machine having the same, wherein the engine comprises: a cylinder; a plurality of piston chambers, which are arranged in the cylinder, each piston chamber is provided with a piston, and a space between the piston chamber and the piston is enclosed A combustion chamber is formed, and the piston is suitable for reciprocating movement in the piston cavity; a plurality of hydraulic pump cores are fixedly arranged in the cylinder and located outside the piston, a plurality of hydraulic pump cores and a plurality of piston cavities are set in one-to-one correspondence, and the hydraulic valve cores are arranged in a one-to-one correspondence. The pump oil chamber is enclosed with the piston. The hydraulic pump core has an oil inlet channel and an oil discharge channel. The outlet of the oil inlet channel and the inlet of the oil discharge channel are connected with the pump oil chamber; The pistons are connected, and the transmission structure is suitable for making a plurality of pistons move in linkage. The technical solution of the present invention solves the defect of low energy conversion efficiency of the engine and the hydraulic pump in the prior art.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to an engine and a construction machinery having the same. Background technique [0002] Excavation equipment (such as excavator) is a non-road mobile machine. The driving method of its working device is as follows: the central shaft of the hydraulic pump (large excavation equipment usually adopts a plunger pump) is driven to rotate by a diesel engine, and the hydraulic pump generates oil pressure, thereby affecting the work. The device provides power. In this process, the engine mixed gas compression ignition works on the piston, and the reciprocating motion of the piston is converted into the rotational motion of the crankshaft through the crank connecting rod mechanism composed of the piston, the connecting rod and the crankshaft. The rotational motion of the crankshaft is transmitted to the central shaft of the plunger pump, which in turn makes the plunger pump w...

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Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low energy conversion efficiency of the engine and hydraulic pump in the prior art, thereby providing an engine and a construction machine with it

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