Rotary compressor, method of manufacturing a rotary compressor, and apparatus for manufacturing a rotary compressor

A rotary compressor, comprising:

• a case having an inner space;
• a stator to which power is applied, the stator being disposed in the case;
• and
• a compression mechanism disposed adjacent the stator to generate a compression force of a refrigerant, wherein the compression mechanism comprises:
• a rotational shaft;
• a cylinder that accommodates a roller coupled to the rotational shaft;
• a main bearing coupled to a first side of the cylinder, the main bearing being press-fitted and fixed to an inner circumferential surface of the case;
• and
• a sub bearing coupled to a second side of the cylinder, wherein the main bearing comprises:
• a bearing body having a shaft through hole through which the rotational shaft passes, the bearing body comprising a valve installation portion having a recessed shape to allow a discharge valve to be seated thereon and in which a discharge hole, through which a compressed refrigerant is discharged, is defined;
• and
• first and second deformation prevention portions that vertically pass through the main bearing to prevent the main bearing from being deformed while the main bearing is press-fitted, wherein the discharge valve comprises a valve body that selectively covers the discharge hole and a coupling portion that couples the valve body to the valve installation portion, and wherein a sum of a first angle formed by a first pair of lines that connects a center of the main bearing to both ends of the first deformation prevention portion and a second angle formed by a second pair of lines that connects the center of the main bearing to both ends of the second deformation prevention portion is greater than an angle formed by lines that connect the center of the main bearing to the discharge hole and the coupling portion.