a diesel engine

Abstract

The invention discloses a belt tightening pulley, comprising a supporting plate and a belt pulley, wherein the belt pulley is installed on one end of the supporting plate; a supporting body is installed on the other end of the supporting plate; the belt pulley and the supporting body are located on the same side of the supporting plate and further installed towards a direction far away from a diesel engine body, namely the belt tightening pulley is a homodromous tensioning pulley and further is installed in a manner of being back to the diesel engine body; in such a way, the tensioning pulley generates no friction with a belt during the installation process, so that the service life of the belt is prolonged; moreover, due to the back installation towards the diesel engine body, no interference with the diesel engine body is generated during the installation process; and therefore, the process of dismantling the belt is enabled to be more convenient. The invention also provides a diesel engine comprising the belt tightening pulley.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a diesel engine. Background technique [0002] Belt transmission relies on tension and friction to transmit motion and power. It has the advantages of simple structure, stable transmission, convenient maintenance, low cost, overload protection and large transmission center distance, so it is widely used in machinery. In order to meet the requirement that the belt transmission has a stable torque transmission function during a long working time, in addition to applying a certain initial pre-tightening force to the belt transmission, a tensioning device must also be added. The commonly used tightening methods include regular tightening and automatic tightening. In automatic tensioning, commonly used methods include: gravity type, elastic type, hydraulic type and intelligent type, etc., and the occasions used by various methods are also different. Considering the lim...

AI Technical Summary

Problems solved by technology

[0004] Although the opposite direction tensioner can facilitate the engine to assemble the belt, but the force arm of this kind of tensioner is too long, the load acting on the central shaft is too large, the center bushing and bushing are prone to eccentric wear, causing the tensioner Early failure, therefore, the current use of the same direction tensioner more

[0005] However, although the force arm of the tension pulley in the same direction is short, the installation surface of the tension pulley in the same direction faces the body to be installed. When the belt wrap angle is too large (≥130 degrees) or the belt needs to go around the center of the arm, the A wrench tool is required, and the installation of the engine belt is laborious; at the same time, the root of the pin of the tensioner is protruding, which is easy to interfere with the machine body, and the coplanarity with the wheel train is poor, which further increases the difficulty of installation; the traditional tensioner The blocking cover of the wheel and the connecting body are connected by an optical axis, and the damping between the two is too small, resulting in too large swing angle of the tensioner arm; in addition,

[0006] The blocking cover of the traditional tensioning wheel is connected with the central shaft sleeve through the inner hole, which is all connected by screw riveting, and the damping size of the automatic tensioning wheel cannot be adjusted. The overall force is uneven, which may easily cause local fatigue damage and affect the use of the tensioning wheel life

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