| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electromagnetic coupling device having a hollow shaft molded out of a synthetic resin material and being easy and inexpensive in assembling as well as to provide an electromagnetic coupling device capable of preventing reduction in attraction force of an armature. SOLUTION: An elastic piece 4c of a second shaft member 4 is elastically deformed to be inserted into a locking groove 3 of a first shaft member 2, an engaging claw 4d of a second shaft member 4 is engaged with a recessed part 3b of a yoke support part 2a of the first shaft member 2 to integrally rotatably fit a rotor 5 to a rotor fitting part 2c of the first shaft member 2. The rotor 5 is sandwiched between a yoke side abutting surface 2e of the first shaft member 2 and a hub side abutting surface 4e of the second shaft member 4. A magnetic fluxΦgenerated by carrying an electric current to an electromagnetic coil 6 flows to an inside annular member (an inner pole part) 7b of a yoke 7 by passing through a magnetic path member 10 from the rotor 5.</p> |
