Double- headed piston type swash plate compressor

A double-headed piston type swash plate compressor comprising:

• a rotation shaft extending in an axial direction and a radial direction;
• a housing that accommodates the rotation shaft;
• a swash plate that rotates when the rotation shaft rotates;
• two cylinder bores located in the housing at an outer side of the rotation shaft in the radial direction;
• a double-headed piston that reciprocates in the two cylinder bores;
• and
• two shoes that couple the double-headed piston to the swash plate, wherein
• the two cylinder bores and the double-headed piston define two compression chambers,
• rotation of the swash plate reciprocates the double-headed piston in the two cylinder bores and compresses fluid in each of the compression chambers,
• the double-headed piston includes:
• two shoe holders that hold the two shoes, wherein the two shoe holders are opposed to each other in an axial direction of the double-headed piston;
• a neck that couples the two shoe holders, wherein the neck is located at an outer circumferential side of the swash plate and deformable in the radial direction;
• two heads respectively located at two ends of the double-headed piston in the axial direction of the double-headed piston, wherein each of the two heads includes a side surface opposing a wall surface of the cylinder bore;
• and
• two coupling portions that couple the two shoe holders and the two heads, respectively,
• at least one of the two coupling portions includes a load receiving portion located between the corresponding head and the corresponding shoe holder as viewed in the radial direction, wherein the load receiving portion is configured to receive bending load that is applied from the swash plate to the double-headed piston and acts toward an inner side in the radial direction,
• the load receiving portion is separated from the wall surface of the cylinder bore when load applied to the double-headed piston is less than a specific threshold value, and
• the load receiving portion abuts against the inner wall of the cylinder bore and receives the bending load when the load applied to the double-headed piston is greater than the specific threshold value.