Air compressor

Abstract

Disclosed is an air compressor including a cylinder including a recessed compression chamber, and an orbiter including a frame forming a main body and a piston rod protruding from the frame, wherein the piston rod includes a piston rod inner circumferential surface and a piston rod outer circumferential surface, the piston rod having an ending part formed at its end to protrude from the frame, a diameter of an imaginary circle derived from the curvature formed on the ending part formed at the end of the piston rod is larger than a width ranging from the piston rod inner circumferential surface to the piston rod outer circumferential surface, the piston rod is shaped of a transformed ring having a non-continuous portion, the piston rod inner circumferential surface is an inner circumferential surface shaped of the transformed ring, the piston rod outer circumferential surface is an outer circumferential surface shaped of the transformed ring, and the ending part is defined by the non-continuous portion of the transformed ring. Therefore, in compressing the external air due to a contact between the closed surface of the terminal portion of the compression chamber and the ending part of the terminal portion of the piston rod, a contact area is increased, thereby increasing the compressive force of the air compressor.

Description

TECHNICAL FIELD[0001]The present invention relates to an air compressor, and more particularly, to an air compressor having an increased compressive force.BACKGROUND ART[0002]In general, a rotary air compressor is a device that seals a given volume of a chamber with gas and reduces the volume closed with gas using a piston or a rotor to increase the pressure of air. In particular, the rotary air compressor is widely used in a wide variety of industrial fields, such as a compressor for vehicle maintenance or machine fabrication, a compressor used in construction sites, air tools, and so on, owing to various advantages including achievement of compactness and lightness in weight, reduction in vibrations and noises, and so on.[0003]As a representative example of the rotary air compressor, a small compressor is disclosed by other applicants in Korean Patent Registration No. 10-0323063. The disclosed small compressor is configured such that a rotation shaft, which rotates by a motor disp...

AI Technical Summary

Benefits of technology

The present invention improves the compressive force of an air compressor by increasing the contact area between the closed surface of the terminal portion of the compression chamber and the ending part of the terminal portion of the piston rod. This results in a larger amount of external air being compressed.

Problems solved by technology

However, since the rotary air compressor operates such that when the movable body and the ring-shaped operating holes rotate based on left-right symmetrical configuration, they continuously strike the circular vane and the inner wall of the second housing, as disclosed in the prior art registered patent (Korean Patent Registration No. 10-0323063), considerably high operating noises are generated.

In addition, since the circular vane and the second housing are integrally formed, a molding working becomes complicated, thereby significantly increasing the fabrication time and cost.

In the above-described air compressor, however, the holder ring for inducing a stable cam motion is coupled only to the center of the orbiter, making it quite difficult for the orbiter to trigger the stable cam motion when the orbiter having a predetermined amount of eccentricity performs an eccentric rotary motion.

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