Internal-combustion-engine starting apparatus

Patent metadata

Field	Value
Publication number	US-2019136819-A1
Application number	US-201616079216-A
Country	US
Kind code	A1
Filing date	Jun 15, 2016
Priority date	Jun 15, 2016
Publication date	May 9, 2019
Grant date	—

Abstract

There is provided an internal-combustion-engine starting apparatus that eliminates the restriction that the portion of the output axle at the axial-direction anti-motor side needs to be narrower than the inner diameter of an inner ring portion and that eliminates the requirement that a member for restricting the output axle from traveling toward the axial-direction anti-motor side is added as an extra component. An internal-combustion-engine starting apparatus (1) is characterized in that the outer helical spline (11) includes an outer ridge portion (12), in that an inner helical spline (20) includes a both-side opened recess groove portion (21) and a one-side opened recess groove portion (22), in that the outer ridge portion (12) engages with the one-side opened recess groove portion (22), in that the outer diameter of an inner small-diameter portion (24) of an output axle (4) is smaller than the inner diameter of the tooth crest of the outer helical spline 11, in that the outer diameter of an inner large-diameter portion (33) of the output axle (4) is larger than the inner diameter of the tooth crest of the outer helical spline (11), and in that the axial-direction length of the inner small-diameter portion (24) is the same as or larger than the axial-direction length of the outer ridge portion (12).

First claim

1 . An internal-combustion-engine starting apparatus comprising:
a motor; a one-way clutch provided with a tubular outer ring portion to which rotation driving force of the motor is transferred, a tubular inner ring portion that is disposed at a radial-direction inner side of the outer ring portion and that an outer helical spline is formed on an inner circumferential surface of the inner ring portion, and a plurality of engagement members that make the outer ring portion and the inner ring portion engage with each other at a time of one-way rotation; an output axle that can travel in an axial-direction and that an inner helical spline engaging with the outer helical spline is formed on a portion of an outer circumferential surface of the output axle at the axial-direction motor side; and a pinion gear coupled with a portion of the output axle at the axial-direction anti-motor side, wherein the outer helical spline is provided with an outer ridge portion that forms a tooth, wherein the inner helical spline is provided with:
a both-side opened recess groove portion that is a recess groove portion whose axial-direction motor side and axial-direction anti-motor side are opened so that the outer ridge portion can pass therethrough toward the axial-direction motor side and the axial-direction anti-motor side; and
a one-side opened recess groove portion that is a recess groove portion whose axial-direction motor side is closed and whose axial-direction anti-motor side is opened so that although obstructed from passing therethrough toward the axial-direction motor side, the outer ridge portion can pass therethrough toward the axial-direction anti-motor side,
wherein the outer ridge portion engages with the one-side opened recess groove portion, wherein an outer diameter of an inner small-diameter portion that is a portion of the output axle at the axial-direction anti-motor side of the inner helical spline is smaller than an inner diameter of the tooth crest of the outer helical spline, wherein an outer diameter of an inner large-diameter portion that is a portion of the output axle at the axial-direction anti-motor side of the inner small-diameter portion is larger than the inner diameter of the tooth crest of the outer helical spline, and wherein an axial-direction length of the inner small-diameter portion is the same as or larger than an axial-direction length of the outer ridge portion.

2 . The internal-combustion-engine starting apparatus according to claim 1 , further comprising a ring-shaped spacer that is fit to an outer circumferential surface of an end portion of the inner small-diameter portion at the axial-direction anti-motor side,
wherein an axial-direction length obtained by subtracting an axial-direction length of the spacer from the axial-direction length of the inner small-diameter portion is shorter than the axial-direction length of the outer ridge portion.

3 . The internal-combustion-engine starting apparatus according to claim 1 ,
wherein an end portion of the outer ring portion at the axial-direction motor side is coupled with a radial-direction extending portion that extends toward the radial-direction inner side, wherein an endface of the output axle at the axial-direction motor side abuts on an endface of the radial-direction extending portion at the axial-direction anti-motor side, so that the output axle is restricted from traveling toward the axial-direction motor side, and wherein when the endface of the output axle at the axial-direction motor side abuts on the endface of the radial-direction extending portion at the axial-direction anti-motor side, the respective axial-direction positions of the outer ridge portion and the one-side opened recess groove portion overlap with each other.

Assignees

• Mitsubishi Electric Corp

Inventors

• Ito Tasuku

Classifications

• F16D41/185

  the engaging movement having an axial component · CPC title

• F02N15/04 Primary

  the gearing including disengaging toothed gears · CPC title

• F02N15/067

  the starter comprising an electro-magnetically actuated lever · CPC title

• F02N15/062

  Starter drives · CPC title

• F02N15/046

  of the planetary type · CPC title