Double-piston compressor having a sliding block producing a stroke curve that deviates from a sinusoidal stroke curve

A two-stage compressor of a compressed air supply device, the two-stage compressor comprising:

• a low pressure stage having a low pressure cylinder;
• a high pressure stage having a high pressure cylinder;
• a low pressure piston guided in an axially movable manner in the low pressure cylinder;
• a high pressure piston guided in an axially movable manner in the high pressure cylinder;
• a piston rod rigidly connecting the low pressure piston and the high pressure piston;
• and
• a sliding block guide, the sliding block guide having a recess arranged in the piston rod, the sliding block guide having two substantially parallel sliding block tracks, one of the sliding block tracks having an arc-shaped indentation in a central portion,
• wherein the cylinder of the low pressure stage and the cylinder of the high pressure stage are arranged radially opposite with respect to an axis of rotation of a drive shaft,
• wherein the low pressure piston and the high pressure piston are connected to the drive shaft via the sliding block guide,
• wherein the two sliding block tracks are aligned in a plane perpendicular to the axis of rotation of the drive shaft,
• wherein the drive shaft has a drive interface configured to engage with the recess, an axis of the drive interface being arranged axially parallel to the axis of rotation of the drive shaft, the drive interface being secured on the drive shaft with an eccentricity, and
• wherein the sliding block tracks of the sliding block guide are constructed and arranged such that, during operation of the two-stage compressor, a movement of the low pressure piston and of the high pressure piston follows a piston stroke curve that deviates from a regular sinusoidal stroke curve having an amplitude corresponding to the eccentricity of the drive interface.