Pressure sensor attachment structure

A sensor attachment structure comprising:

• an oil pressure sensor including a sensor case and a pressure sensor element accommodated in the sensor case, the sensor case including a body portion having a circular horizontal section;
• and
• a valve body including an upper body and a lower body, the upper body including an accommodation space having a wall surface having a circular horizontal section, the accommodation space having the body portion inserted therein such that the body portion is capable of rotating about a central axis thereof extending in a vertical direction, the lower body including an oil passage arranged to extend therethrough toward the upper body;
• wherein
• the sensor case includes a stopper arranged to project in a horizontal direction in an outer circumferential surface of the body portion;
• the accommodation space includes a guide groove arranged to extend in the vertical direction at the wall surface thereof, the guide groove being arranged to allow the stopper to move therein;
• the upper body includes a restricting portion arranged to restrict a vertical movement of the stopper in a situation in which the body portion is disposed in the accommodation space;
• and
• a space portion allowing the stopper to move therein is arranged between the guide groove and the restricting portion.