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starter

A starter and center support technology, applied to engine components, engine starting, machine/engine, etc., can solve problems such as load transfer without considering load transfer, achieve the effect of improving reliability and suppressing noise diffusion

Active Publication Date: 2020-10-16
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the prior art described above, no consideration is given to the load transmission from the rotation bearing of the pinion shaft as the load transmission to the gearbox, which is a further problem aimed at suppressing noise

Method used

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Embodiment 1

[0021] The starter 1 is composed of a magnetic switch 2 , a power transmission unit 3 and a motor 4 . When the current flows from the battery to the excitation coil housed inside the magnetic switch 2, the plunger 5 is attracted, and the pinion 6 housed in the power transmission part 3 is shifted via the shift rod 7 to face the motor mounted on the engine. The ring gear 15 moves in the axial direction, and the pinion gear 6 meshes with the ring gear 15 .

[0022] The motor 4 is composed of a laminated iron core 8 , a coil 9 , a commutator 10 , a shaft 11 , and an armature 12 . The armature 12 is rotatably mounted on slide bearings 12a, 12b. The external teeth 11a are formed on the top end of the shaft 11 and mesh with the planetary gears 13a of the planetary gear reduction mechanism 13 inside the power transmission part 3, so that the rotational force of the motor 4 is transmitted to the pinion shaft 14 at a prescribed reduction ratio, and rotates through the pinion shaft 14....

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Abstract

The present invention addresses the problem that load propagation from a rotation support portion of a pinion shaft was not taken into consideration as load propagation to a gear case and further suppression of noise was not achieved. A starter for starting an internal combustion engine according to the present invention is achieved by forming a center bracket such that a support portion of a bearing member for rotatably supporting a pinion shaft is integrally formed with an internal gear of a planetary gear, by providing a rubber damper on the outer periphery of the center bracket, and by housing the center bracket in the gear case such that the rubber damper can contact the gear case.

Description

technical field [0001] The present invention relates to an electric motor using a planetary gear transmission, and more particularly to a starter used for starting an internal combustion engine. Background technique [0002] A starter for starting an internal combustion engine is composed of a motor unit, a power transmission mechanism unit composed of a speed reduction mechanism unit, a pinion shaft, and a pinion gear, and a gearbox housing the power transmission mechanism unit. [0003] The reduction mechanism unit is composed of an external gear integrally formed with the armature shaft of the motor unit, an internal gear, and a plurality of planetary gears rotatably supported on the pinion shaft. A configuration is disclosed in which an internal gear is accommodated and held in a center bracket, the center bracket has a bearing at the center, and rotatably supports a pinion shaft and is accommodated in a gear case (see Patent Document 1). [0004] In recent years, the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02N11/00F02N11/08F02N15/02F02N15/06
CPCF02N11/00F02N11/08F02N15/02F02N15/06
Inventor 伊藤胜西馆圭介滨畑定博
Owner HITACHI ASTEMO LTD
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