Patent ID: 7771175

Claim:
A variable displacement compressor for compressing gas comprising: a housing having a cylinder bore; a drive shaft rotatably supported by the housing; a lug plate connected to the drive shaft so as to rotate together with the drive shaft; a cam plate supported on the drive shaft so as to incline with respect to the drive shaft; a piston accommodated in the cylinder bore for reciprocation, the piston being engaged with the cam plate; and a link mechanism provided between the lug plate and the cam plate for transmitting rotation of the lug plate to the cam plate to reciprocate the piston thereby performing gas compression, an inclination angle of the cam plate being varied while being guided by the link mechanism to change stroke of the piston so that displacement of the compressor is varied, the link mechanism including: support portion protruding from the cam plate toward the lug plate; a first transmitting portion for transmitting rotation of the lug plate to the cam plate, the first transmitting portion including a first transmitting surface formed in the lug plate and a first receiving surface formed in the cam plate; a second transmitting portion for transmitting compression reactive force from the cam plate to the lug plate, the second transmitting portion including a second transmitting surface formed on a peripheral surface of a roller rotatably supported by the support portion and a second receiving surface formed in the lug plate, the first and second transmitting portions being arranged along a rotational direction of the drive shaft, the support portion being arranged between the first and second transmitting portions in the rotational direction of the drive shaft; and a movement restrictor arranged between the first transmitting portion and the second transmitting portion, the movement restrictor including a restricting surface formed in the lug plate and a restricted surface protruding from the support portion, wherein a movement of the first receiving surface away from the first transmitting surface in the rotational direction of the drive shaft is restricted by the movement restrictor in such a manner that the restricted surface comes into contact with the restricting surface.