JPS597920U - Magnetic powder electromagnetic clutch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a magnetic particle type electromagnetic clutch which is an embodiment of the present invention. FIG. 2 is an explanatory diagram conceptually showing the relative relationship between the yoke and the rotor in the same clutch, and FIG. 3 is a developed view of the inner circumferential friction surface of the yoke in the same clutch. FIG. 4 is an explanatory diagram for explaining the reason why a blocking member and an annular groove are provided at the center of the inner peripheral friction surface and the outer peripheral friction surface. FIG. 5 is an explanatory diagram conceptually showing the filling situation of magnetic particles in the clutch,
The density of many vertical lines in the figure represents the magnetic particle density. FIG. 6 is an explanatory diagram showing a state of magnetic powder filling in a conventional clutch shown for comparison. 7, 8, and 9 correspond to FIG. 3 in another embodiment of the present invention, and FIG. 10 is a sectional view taken along line XX in FIG. 9. FIGS. 11 and 12 are explanatory diagrams each conceptually showing the cross-sectional shape of an inclined groove in another embodiment of the present invention. FIGS. 13 and 14 are cross-sectional views showing exaggerated cross-sectional shapes of a yoke and a rotor in another embodiment of the present invention, respectively. 14: Yoke, 16: Excitation coil, 18.84: Inner peripheral friction surface, 28: 0-evening, 30. 80: Outer peripheral friction surface, 32
, 82.86: Gap in the radial direction, 36: Magnetic powder, 6'i, 68. 70. 76, 78: Slanted groove, 64: Blocking member, 65, 66: Annular groove.

Claims (1)

[Claims for Utility Model Registration] A driving member having a cylindrical shape and rotating around a center line; a driven member provided inside the driving member concentrically with the driving member and rotatable relative to the driving member; and an excitation coil provided on the drive member. Due to the excitation of the excitation coil, the gap between the inner peripheral friction surface of the driving member and the outer peripheral friction surface of the driven member is filled with magnetic particles, and the frictional force and electromagnetic coupling force between the magnetic particles cause the driving member to In a magnetic particle type electromagnetic clutch of a type in which the rotation of the driving member is transmitted to the driven member, grooves are formed in the inner circumferential friction surface of the driving member, each extending from both ends of the friction surface in the width direction toward the center. The magnetic particle type is characterized in that the magnetic particle type is formed so as to be inclined in a direction in which the relative movement vector of the outer circumferential friction surface with respect to the inner circumferential friction surface advances from the both ends toward the center along the groove. electromagnetic clutch.