Rotary compressor with vane coupled to rolling piston

A compressor, comprising:

• a drive motor;
• a rotation shaft configured to transfer a rotation force of the drive motor, the rotation shaft having an eccentric portion;
• a cylinder provided at one side of the drive motor;
• a rolling piston coupled to the eccentric portion of the rotation shaft, and having a hinge recess at an outer circumferential surface thereof;
• and
• a vane including a vane body slidably inserted into the cylinder, and a hinge protrusion rotatably inserted into the hinge recess of the rolling piston to be rotatable by a predetermined angle, wherein the hinge protrusion includes:
• at least one bearing surface provided on an outer circumferential surface of the hinge protrusion, wherein the at least one bearing surface is formed as a curved surface so as to slidably contact the an inner circumferential surface of the hinge recess;
• and
• a plurality of flat surfaces formed on the outer circumferential surface of the hinge protrusion, wherein the plurality of flat surfaces is respectively formed between ends of the at least one bearing surface and side surfaces of the vane body respectively corresponding to the ends of the at least one bearing surface so as to be spaced from the inner circumferential surface of the hinge recess.

A compressor, comprising:

• a rotary shaft;
• first and second bearings that support the rotary shaft;
• a cylinder disposed between the first and second bearings to define a compression space, and comprising a vane slot formed at an inner circumferential surface of the cylinder;
• a rolling piston slidably coupled to the rotary shaft, and comprising a hinge recess formed at an outer circumferential surface of the rolling piston;
• and
• a vane, a first end of which is slidably coupled to the vane slot of the cylinder, and a second end of which is rotatably coupled to the hinge recess of the rolling piston, wherein the vane comprises a hinge protrusion inserted into the hinge recess of the rolling piston, and a vane body connected to the hinge protrusion, and slidably inserted into the vane slot of the cylinder, wherein a diameter of the hinge protrusion is greater than an interval between ends of the hinge recess, wherein the hinge protrusion comprises at least one bearing surface that contacts an inner circumferential surface of the hinge recess and a plurality of spaced surfaces spaced from the inner circumferential surface of the hinge recess formed on an outer circumferential surface of the hinge protrusion as flat surfaces, wherein the at least one bearing surface is disposed only on a rolling piston side based on a virtual line that passes across a rotation center of the hinge protrusion and forms a right angle with respect to a central line in a lengthwise direction of the vane, and wherein at least two of the plurality of spaced surfaces are respectively formed between ends of the at least one bearing surface and side surfaces of the vane body respectively corresponding to the ends of the at least one bearing surface such that the plurality of spaced surfaces are formed at sides of the vane body based on the virtual line.

A compressor, comprising:

• a rotary shaft;
• first and second bearings that support the rotary shaft;
• a cylinder disposed between the first and second bearings to define a compression space, and comprising a vane slot formed at an inner circumferential surface of the cylinder;
• a rolling piston slidably coupled to the rotary shaft, and comprising a hinge recess formed at an outer circumferential surface of the rolling piston;
• and
• a vane, a first end of which is slidably coupled to the vane slot of the cylinder, and a second end of which is rotatably coupled to the hinge recess of the rolling piston, wherein the vane comprises a hinge protrusion inserted into the hinge recess of the rolling piston, and a vane body connected to the hinge protrusion, and slidably inserted into the vane slot of the cylinder, wherein a diameter of the hinge protrusion is greater than an interval between ends of the hinge recess, wherein the hinge protrusion comprises at least one bearing surface that contacts an inner circumferential surface of the hinge recess and a plurality of spaced surfaces spaced from the inner circumferential surface of the hinge recess formed on an outer circumferential surface of the hinge protrusion as flat surfaces, wherein the at least one bearing surface is formed only within a range of ±90° based on a central line in a lengthwise direction of the vane, and wherein at least two of the plurality of spaced surfaces are respectively formed between ends of the at least one bearing surface and side surfaces of the vane body respectively corresponding to the ends of the at least one bearing surface such that the spaced surfaces are formed at sides of the vane body based on a virtual line that passes across a rotation center of the hinge protrusion and forms a right angle with respect to the central line in the lengthwise direction of the vane body.