Fluid pressure rotating machine

A fluid pressure rotating machine comprising:

• a cylinder block configured to be rotated together with a driving shaft;
• a plurality of cylinders formed in the cylinder block, the cylinders being arranged at predetermined intervals in a circumferential direction of the driving shaft;
• pistons respectively slidably inserted into the cylinders, the pistons each configured to define a capacity chamber in an interior of the cylinder;
• a tiltable swash plate configured to cause the pistons to reciprocate such that the capacity chambers are expanded and contracted;
• a first biasing mechanism configured to bias the swash plate in accordance with control pressure supplied;
• a second biasing mechanism configured to bias the swash plate against the first biasing mechanism;
• and
• a regulator configured to control the control pressure guided to the first biasing mechanism in accordance with self-pressure of the fluid pressure rotating machine, wherein
• the regulator has:
• a biasing member configured to be extended and compressed by following tilting of the swash plate;
• a control spool configured to be moved in accordance with a biasing force from the biasing member, the control spool being configured to adjust the control pressure;
• an auxiliary biasing member configured to exert a biasing force to the control spool against the biasing force from the biasing member;
• and
• an adjusting mechanism configured to adjust the biasing force exerted by the auxiliary biasing member.