Fuel injection pump driving device of diesel engine

Abstract

The invention discloses a fuel injection pump driving device of a diesel engine. The fuel injection pump driving device comprises a rolling wheel assembly and a tappet; the rolling wheel assembly comprises a rolling wheel pin, a rolling wheel lining and a rolling wheel; the rolling wheel pin is provided with an oil distribution groove; and a plurality of oil distribution holes are additionally formed in the middle of the rolling wheel lining in the circumferential direction. The fuel injection pump driving device disclosed by the invention can solve the problem that there is insufficient oil supply when fit clearances between the rolling wheel and the lining and between the lining and the rolling wheel reach two end faces of the rolling wheel, the problem about uneven oil supply caused when the fit clearances between the rolling wheel and the lining and between the lining and the rolling wheel pin reach the two end faces of the rolling wheel due to form and location tolerance of parts, and the problem about abnormal wear without changing the overall structure of the fuel driving mechanism.

Description

technical field [0001] The invention belongs to the field of diesel engines, and in particular relates to a driving device for a fuel injection pump of a diesel engine. Background technique [0002] The high-power diesel fuel injection pump usually adopts a single pump, and each cylinder has an independent fuel injection pump. The fuel injection pump is installed on the upper plane of the fuselage next to the cylinder head, driven by the fuel cam of the camshaft through the roller assembly and the tappet. Roller assemblies and tappets are forcibly lubricated with diesel engine oil. The following takes a certain type of diesel engine as an example to illustrate the lubrication of the roller assembly and tappet. [0003] Such as figure 1 , 2 , As shown in 3, a certain type of diesel engine roller, roller bushing, roller pin and tappet are assembled together, and they reciprocate up and down together during work. An interference fit is adopted between the roller pin and th...

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Problems solved by technology

[0006] The invention provides a fuel injection pump driving device for a diesel engine, which can solve the problem that the matching gap between the roller and the bushing, and the bushing and the roller pin reaches the two ends of the roller, and the oil supply is relatively small, and solves the problem that the roller and the bushing are caused by the shape and position tolerance of the parts. 1. The matching gap between the bush and the roller pin reaches the two ends of the roller, and the problem of uneven fuel supply can solve the problem of abnormal wear while keeping the overall structure of the fuel drive mechanism unchanged.

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