Patent ID: 8348232

Claim:
A hydraulic device comprising: a housing formed with oil passages therein; said housing being further formed with a mounting hole having a first end communicating with said oil passages and a second open end open to a surface of the housing; a solenoid valve mounted in the mounting hole, and having a valve portion comprising a valve body and a valve seat, and provided between the oil passages for selectively opening and closing the oil passages and adjusting the degree of opening of the oil passages; and a mounting ring having a tapered surface on an outer periphery thereof, said tapered surface being inclined such that its diameter increases toward the second open end of the mounting hole, for fixing the solenoid valve to the housing; said mounting hole having a shoulder which divides the mounting hole into a small-diameter portion including the first end of the mounting hole, and a large-diameter portion including the second open end of the mounting hole and having a larger diameter than the small-diameter portion; said solenoid valve further comprising a plunger-mounting sleeve having a first end inserted in the mounting hole and a second end protruding from the housing, an energizing coil fitted around the second end of the plunger-mounting sleeve, and a plunger slidably mounted in the plunger-mounting sleeve and configured to be driven under a magnetic attraction force produced when said coil is energized; said valve body being integral with the sleeve; said plunger-mounting sleeve comprising a cylindrical sleeve member, and a sleeve flange comprising a flange portion liquid-tightly joined to an outer periphery of the sleeve member, and a cylindrical portion integrally formed at an outer periphery of the flange portion and bent toward the second open end of the mounting hole; wherein said flange portion of said sleeve flange being seated on the shoulder of the mounting hole; wherein said mounting ring has an inner diameter larger than an outer diameter of said sleeve member and is loosely fitted around the sleeve member while being press-fitted in said cylindrical portion, and wherein said mounting ring presses said flange portion against a seating surface on the shoulder and at least partially wedges said cylindrical portion into an inner peripheral surface of the mounting hole, thereby fixing the plunger-mounting sleeve to the housing.