Patent RU-2541345-C1 (RU)
Inventor: KISELEV ALEKSANDR JAKOVLEVICH
IPC: F02N15/00
Filed: 2013-09-03
Granted: 2015-02-10
Abstract: FIELD: engines and pumps. 
     SUBSTANCE: proposed starter comprises four excitation permanent magnets, motor start draught relay, free-running ratchet clutch (FRC) and planetary reduction gear. Carrier of the latter is engaged via spline with free-running clutch drive case stem. Draught relay solenoid and terminal box are arranged inside the motor stator cover and aligned with its lengthwise axis. Electromagnetic oil core represents the FRC stem, drive gear of the latter being located at initial position on opposite side of flywheel rim with the help of longer mid bush part there between. Bush diameter is smaller than that of driven gear dents circumference. Starter motor armature shaft is integrated with planetary reduction gear sun gear with its stem running in carrier movable shaft. Starter reduction gear epicyclic gear and electromagnetic oil case are made integral of caprolon. Two covers and starter motor stator are coupled by two isolated studs with coppered contact heads that make the electrical conductors. The latter extend through holes made on starter motor stator cover outer side. Two parallel guide rectangular slots of its radial ledges and caprolon rectangular inserts accommodate two parallel contact rectangular rods of fork-like contactor with copper solderings on their ends for making rectangular coppered contact heads of aforesaid studs. Theses separate their contact cavities from ICE clutch case and rule out the ingress of oil and foreign particles to starter terminals. Central cylindrical holes of coil case, on one side, are radial thrust bearing for planetary reduction gear carrier stem. On the other side, these make the guide for FRC helical return spring arranged between end surfaces of FRC drive case and end splined screw bush. The latter is fitted on carrier shaft splines to rest via thrust carrier shaft bush on radial thrust bearing of coil case. This allows to reject split antifriction bearing fitted in coil case and plenary reduction gear shaft thrust flange. Note here that carrier shaft is made of nonmagnetic steel and fitted to carrier stem of magnetic steel on one side and, on the other side, it is fitted in starter motor cover antifriction bearing. With draught relay IN, movable steel fork-like contactor displaces along the FRC in two parallel guide slots for making rectangular coppered contact heads of starter motor starting studs. Coil pull-in magnetic force and shaped return spring expansion force FRC return spring is contracted and held thereat at starting the starter motor. With draught relay in OFF, drive gear with RFC and moving fork-like contactor return to their initial position to radial thrust bearing of starter motor stator cover under action of FRC return spring force. This contracts the shaped relay spring and holds its as-contracted unless draught relay actuation. At a time, draught relay displacement and contraction are performed by the forces of inertia of FRC driven gear and force of friction developed at driven case overrunning of drive case after ICE starting between their end surfaces pressed from both sides by RFC return spring and shaped relay spring. 
     EFFECT: higher operating performances. 
     3 dwg