Mitsubishi Denki Kabushiki Kaisha

Hirohide Ikeda

Keiichi Kusumoto

Kyoichi Okamoto

Kensaku Kuroki

Kouji Yokota

Akio Seta

Katsunori Yagi

Kazuhide Nishii

An auxiliary rotation-system starter includes a starter motor, a main circuit portion having a main contact portion, an auxiliary circuit portion having a driving coil portion for opening or closing the main contact portion, and a fuse for cutting the current flow to the driving coil portion by fusing at a predetermined temperature. The main circuit portion is connected between the starter motor and a power source. The auxiliary circuit portion is connected in parallel with the main contact portion. The fuse is provided in the auxiliary circuit portion.

Auxiliary rotation-system starter

The brush device of a starter with an overheat protection device of the present invention is provided with brush holders, brushes slidably supported in the brush holders, respectively, springs contacting one sides of the brushes to press the brushes in the radial, inner directions, and thermostats disposed on the brushes and adapted to interrupt energization of a starting motor with a power when the brushes exceed a predetermined temperature, caused by the starting motor continuously energized with the power supply.

Starter with overheat protection device including brush device

In an electric starter motor, a planetary reduction assembly includes: a sun gear engraved in an outer circumferential portion on a front side of a motor output shaft formed integrally with the armature; a ring formed into a cylindrical shape with a rotation stop projecting on an outer circumferential wall surface thereof and coupled to a front bracket while its movement in the circumferential direction is restricted by the rotation stop; an internal gear formed into a bottomed cylindrical shape with a center hole formed in a central portion of a bottom thereof and an inner circumferential gear portion engraved in an inner circumferential wall surface thereof, the internal gear being fitted in the ring so as to open on a rear side; a discoid flange portion formed integrally with an end portion on the rear side of the starter output shaft, supported rotatably to the bottom of the internal gear through a bearing and rotatably supporting an end portion on the front side of the motor output shaft through a bearing; and a plurality of planetary gears rotatably supported to a plurality of pins implanted concentrically at an equiangular pitch on an end face on the rear side of the flange portion, respectively, and engaging with the inner circumferential gear portion and the sun gear, and wherein the internal gear is fitted in the ring so as to slidingly rotate relative to the ring when a rotational torque to be applied to the starter output shaft exceeds a predetermined transmission rotational torque.

Electric starter motor

A starter comprises a fixing member which has a cylindrical portion and rotation stoppers on the outer wall of the cylindrical portion and is fixed to a bracket so that its movement in a circumferential direction is limited by the rotation stoppers, a mating portion is formed by mating the inner surface of the cylindrical portion of the fixing member with the outer surface of the internal gear of the epicyclic gear reduction unit, and the mating portion is set such that the internal gear slides and rotates with respect to the fixing member when rotation torque applied to the starting output shaft exceeds a predetermined value by machining the end surface of the cylindrical portion of a provisional mating portion formed by provisionally mating the inner surface of the cylindrical portion of the fixing member with the outer surface of the internal gear. Therefore, the breakage of elements of the output transmission system of the starter can be prevented.

Growing community of inventors

Tokyo, Japan

Hirohide Ikeda