| 摘要 |
The utility model provides a driving force transmitting device which can reliably enable an electromagnetic clutch device to play a role even under a condition of leakage flux leaked from armature to a protrusion part of a movable cam part. The protrusion part (130) is formedthe movable cam part (52). A ring-shaped end face is formed by the protrusion part (130) and protrudes towards one side of an armature (43). The protrusion part (130) is connected with the armature (43) in an abutting mode to limit the armature (43) to move towards the opposite direction of the side of a magnet yoke (41). The protrusion part (130) comprises an inner circumference barrel face (131), an outer circumference barrel face (132), a ring-shaped end face (133), an inner circumference chamfer (134) and an outer circumference chamber (135), wherein the end face (133) is capable of being connected with the armature (43) in an abutting mode, the inner circumference chamfer (134) which is in a cone shape of the inner circumference is connected with the inner circumference barrel face (131) and the end face (133), and the outer circumference chamber (135) which is in a cone shape of the outer circumference is connected with the outer circumference barrel face (132) and the end face (133). The radial length (Wb) of the end face (133) is set in a range of 1.3mm to 2.0mm. |
