Electromagnetic coupling apparatus
AssigneeOgura Clutch Co., Ltd.
InventorTakashi Ishimaru
Life of this patent
Estimating the term…
Abstract
In an electromagnetic coupling apparatus, an excitation coil constituted by a plurality of turns of a winding member is covered with a resin coil bobbin. The coil bobbin can be divided into at least two members and is formed into a hollow annular shape. The divided mating surfaces of the members constituting the coil bobbin are joined to each other by ultrasonic welding.
Claims2
An electromagnetic coupling apparatus comprising an excitation unit constituted by an excitation coil wound around a coil bobbin, a yoke in which said excitation coil is arranged, a resin terminal base casing fixed to a rear surface of said yoke, and a pair of terminals which are fixed in said terminal base casing by insert molding and are respectively connected to turn start and end portions of said excitation coil, wherein a cylindrical opening portion through which turn start and end portions of said excitation coil are extracted is formed on said coil bobbin, a protruding opening portion which is fitted in a through hole formed in said yoke and allows said turn start and end portions to be inserted therein is formed on a bottom portion of said terminal base casing, and said protruding opening portion is forcibly fitted and fixed in said cylindrical opening portion through a rubber bush.
Dependencies are inferred from the claim text.