Locking device for dual capacity compressor

Abstract

The invention is about a double capacity compressor, relates to the interlocking gear of double capacity compressor. according to the rotating direction of the crankshaft, after the eccentric sleeve rotates to the position needed by the cam-lock, it will rotate with the cam-lock of the crankshaft integrally. On the eccentric sleeve, a eccentric mass part is arranged for generating centrifugal force along with the crankshaft rotation, on the cam-lock, a self-closing pin is arranged for making the eccentric sleeve rotate with the crankshaft, on the eccentric sleeve, a hanging end is formed for the self-closing pin. When the rotary force of the crank is transferred to the joint lever inserted into eccentric sleeve, the crank is linked to the cam-lock. For preventing the abrasion of the hanging bottom end of the eccentric sleeve and the cam-lock, the effect avoidance segment difference is formed along the top inner diameter edge of the eccentric sleeve or top outer diameter of the cam-lock. The invention can prevent abrasion of eccentric sleeve and cam-lock, and improve precision of the eccentric sleeve.

Description

technical field [0001] The present invention relates to a hermetic compressor, and more specifically relates to a locking mechanism of a double capacity compressor which changes the compression capacity by changing the piston stroke according to the rotation direction of the crankshaft. Background technique [0002] The dual-capacity compressor is a reciprocating compressor that changes the compression capacity by changing the stroke of the piston connected by the connecting rod and the crankshaft according to the direction of rotation of the crankshaft. Such a dual-capacity compressor is used in refrigeration cycles such as refrigerators. In addition, the dual-capacity compressor adjusts the compression capacity according to the refrigeration load, thereby improving compressor efficiency. [0003] Such a dual capacity compressor is described in U.S. Patent No. 4,236,874, and reference figure 1 and image 3 illustrate. As shown in the figure, the crankshaft (1) which rot...

AI Technical Summary

Problems solved by technology

However, since buffer grooves (11, 12) are formed on the outer peripheral surface of the above-mentioned eccentric part (3) and the inner peripheral surface of the corresponding eccentric sleeve (4), the outer peripheral surface of the above-mentioned eccentric part (3) and the corresponding eccentric sleeve (4) The inner peripheral surface cannot be all precisely machined, except for the buffer grooves (11, 12)

As a result, the parts that require precision machining cannot be symmetrical with the whole workpiece, so the precision of machining is relatively reduced.

[0014] Moreover, due to the above-mentioned buffer grooves (11, 12), the eccentric part (3) and the eccentric sleeve (4) may be scratched.

Therefore, if it is used for a long time, the operating efficiency of the compressor will decrease

Images