Slant plate type compressor with variable displacement mechanism.

摘要

A slant plate type compressor (10) with a variable displacement mechanism is disclosed. The compressor (10) includes a drive mechanism having a drive shaft (26) rotatably supported in a compressor housing (20) and a coupling mechanism for drivingly coupling the drive shaft to pistons such that rotary motion of the drive shaft is converted into reciprocating motion of the pistons (71). The coupling mechanism includes a slant plate having an inclined surface. The slant angle changes in response to the change in pressure in a crank chamber to change the capacity of the compressor. The drive shaft includes an inner end portion (26a) of which diameter is smaller than a diameter of the remainder of the drive shaft (26). A bias spring (34) of which outer diameter is greater than a diameter of the remainder of the drive shaft is resiliently mounted on the inner end portion (26a) of the drive shaft (26) between the slant plate and the cylinder block to restore the slant plate back to a maximum slant angle when the slant angle is decreased to below a predetermined angle without interference with free pivoting motion of the slant plate between various inclination angles. Thereby, the impact force acting on the internal component parts of the compressor at the time when the operation of the compressor is restarted can be reduced, while the bias spring (34) can sufficiently urge the slant plate toward the maximum slant angle if the slant angle decreases to below the predetermined slant angle.