Patent ID: 7487708

Claim:
A fluid pressure cylinder comprising: a cylinder body having a cylinder chamber therein; an axle member including a piston axially reciprocally mounted in the cylinder chamber and separating the cylinder chamber into a forward fluid pressure chamber and a backward fluid pressure chamber and a piston rod externally and axially projecting from the cylinder body; a movable stopper having a through-hole which is penetrated by the piston rod and being threadably engaged with a female screw formed in an end portion of the cylinder body to control a stroke end position of the piston; an O-ring provided on an outer circumference of the movable stopper; a rotating knob having a second through-hole which is penetrated by the piston rod and being substantially disk-shaped provided rotatably on an end face of the cylinder body; a rotation transmitting pin fixed to and extending axially from the rotating knob, the rotation transmitting pin slidably inserted into a rotation transmitting, axially extending hole formed in the movable stopper for transmitting rotation of the rotating knob to the movable stopper; and a knob attaching structure including: a retaining groove formed in the cylinder body opposite to the rotating knob on an outer circumference side of an opening of the cylinder chamber; a cylindrical edge portion having a flange fitted into the retaining groove and formed in the rotating knob; and a pin engaged with the flange in the retaining groove, wherein, by the rotating knob via the rotation transmitting pin, even when the movable stopper is moved axially away from the rotating knob, the rotation of the rotating knob continues to be transmitted to the movable stopper by the rotation transmitting pin and the movable stopper is made to be rotated to move the movable stopper axially thereby to adjust the stroke end position of the axial member.