Engine starter designed to have enhanced stability of engagement of pinion with ring gear

Abstract

A starter for automotive engines is provided which is equipped with a pinion carrier which is shifted by a magnetic attraction, as transmitted from a solenoid switch through a shift lever, to establish engagement of a pinion with a ring gear jointed to the engine. If thrust acting on the pinion carrier to urge the pinion against the ring gear through when the pinion has been shifted and hit the ring gear, so that the pinion is placed in abutment with the ring gear is defined as N (Newton), and the mass of the pinion carrier is defined as g (gram), a relation of g / N<=6 is met. This improves the ability of engagement of the pinion with the ring gear, thus resulting in an increased life span of the starter.

Description

technical field

[0001] The present invention relates generally to a starter for starting a vehicle engine, and more particularly to an improved structure of such a starter equipped with a pinion carrier that passes a magnetic attraction transmitted from an electromagnetic switch via a moving rod. and move so that the pinion and the ring gear connected to the engine come into engagement. Background technique

[0002] Japanese Utility Model First Publication No. 2-87967 discloses a typical engine starter equipped with an output shaft to which the torque of an electric motor is transmitted, a pinion to which torque is transmitted from the output shaft via a clutch and a magnetic switch to turn the motor on or off. When the electromagnetic switch is activated, a magnetic attraction is formed to attract the plunger, and this movement of the plunger is transmitted to the clutch through the moving rod to move the pinion along the output shaft and the clutch, so that the pinion and...

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