ELECTROMAGNETIC CLUTCH HAVING IMPROVED CLUTCH PULL FORCE

摘要

An electromagnetic clutch device for a compressor includes a crank shaft with an inner shaft end accommodated in a compressor housing and with an outer shaft end projecting axially out of the compressor housing. A pulley assembly has a rotor body and a pulley. The rotor body accommodates a coil housing and is rotatably supported on the compressor housing by a pulley bearing. The coil housing includes a radially inner annular wall, a radially outer annular wall, and a bottom an axial end of the coil housing proximate the inner shaft end. An armature plate is connected to the outer shaft end in an axially displaceable manner and rotates with the crank shaft. The outer surfaces of the inner annular wall and the outer annular wall of the coil housing have a greater distance from one another near the bottom of the coil housing than proximate the axially open end.

主权项

1. An electromagnetic clutch device for a compressor (1), comprising:
a crank shaft (22) with an inner shaft end (24) accommodated in a compressor housing (12) and with an outer shaft end (26) projecting axially out of the compressor housing (12); a pulley assembly (14) having a rotor body (16) and a pulley (18) fixedly attached thereto, the rotor body (16) having a toroidal cavity accommodating a coil housing (42) and rotatably supported on the compressor housing (12) by a pulley bearing (30), wherein the coil housing (42) includes a radially inner annular wall (44), a radially outer annular wall (46), an axially open end facing the inner shaft end (26), and a bottom (48) extending radially from the radially inner annular wall (44) to the radially outer annular wall (46) at an axial end of the coil housing (42) proximate the inner shaft end (24); and an armature plate adjacent the rotor body (16) and connected to the inner shaft end (26) in an axially displaceable manner so as to rotate with the crank shaft; wherein the inner annular wall (44) and the outer annular wall (46) of the coil housing (42) each have an outer surface (56, 58), the outer surfaces (56, 58) having a greater distance from one another near the bottom (48) of the coil housing (42) than proximate the axially open end.