Connecting rod component for refrigerator compressor

Abstract

The invention provides a connecting rod component for a refrigerator compressor and belongs to the technical field of refrigerator compressors. The connecting rod component is characterized in that ashaft hole is formed in one end of a rod body, the shaft hole is hinged to an eccentric portion of a crankshaft, an opening is formed in the other end of the rod body, an outer ring of a spherical plain bearing is assembled in the opening, a pin hole is formed in an inner ring of the spherical plain bearing, and the pin hole is fixedly connected to a piston pin. The connecting rod component has the following beneficial effects: the piston pin is prevented from a periodical impulsive load and has low probability of a failure, and the failure rate of the refrigerator compressor is reduced; the piston pin does not need heat treatment and can be made from carbon structural steel with a lower cost instead of alloy structural steel; and a longitudinal degree of freedom is added between the outerring and the inner ring of the spherical plain bearing, so that the demands on the perpendicularity of two holes of a cylinder seat and the parallelism of two axes of the crankshaft are less, a piston, the piston pin and the crankshaft are prevented from eccentric abrasion, abrasion at the pin hole is reduced, and the working efficiency and the working reliability of the compressor are improved.

Description

technical field [0001] The invention relates to the technical field of refrigerator compressors, in particular to a connecting rod assembly for a refrigerator compressor. Background technique [0002] Present refrigerator compressor, is hinged by piston pin between its connecting rod and piston. When the refrigerator compressor is working, the crankshaft drives the connecting rod, and the connecting rod drives the piston to perform linear reciprocating motion. On the one hand, the piston pin is a moving part, which bears a large periodical impact load and is prone to damage, mainly in the form of surface wear and fatigue cracks; on the other hand, the connecting rod and the piston are hinged through the piston pin, lacking longitudinal freedom, Higher requirements are put forward for the verticality of the two holes of the cylinder block and the parallelism of the two axes of the crankshaft. If the accuracy of the above two dimensions of the cylinder block and the crankshaf...

AI Technical Summary

Problems solved by technology

On the one hand, the piston pin is a moving part, which bears a large periodical impact load and is prone to damage, mainly in the form of surface wear and fatigue cracks; on the other hand, the connecting rod and the piston are hinged through the piston pin, lacking longitudinal freedom, Higher requirements are put forward for the verticality of the two holes of the cylinder block and the parallelism of the two axes of the crankshaft. If the accuracy of the above two dimensions of the cylinder block and the crankshaft is insufficient, the piston, piston pin, and crankshaft will all be eccentrically worn, and the pin hole of the connecting rod will Easy to wear and reduce compressor efficiency

In addition, the current refrigerator compressor connecting rod is designed in one piece, the mold is complicated, and the cost investment is high

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