EP0494681B1 - Starter device - Google Patents

Starter device Download PDF

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Publication number
EP0494681B1
EP0494681B1 EP19920100335 EP92100335A EP0494681B1 EP 0494681 B1 EP0494681 B1 EP 0494681B1 EP 19920100335 EP19920100335 EP 19920100335 EP 92100335 A EP92100335 A EP 92100335A EP 0494681 B1 EP0494681 B1 EP 0494681B1
Authority
EP
European Patent Office
Prior art keywords
clutch
output shaft
bearing
cylindrical portion
stopper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19920100335
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0494681A1 (en
Inventor
Shuzou C/O Mitsubishi Denki K.K. Isozumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0494681A1 publication Critical patent/EP0494681A1/en
Application granted granted Critical
Publication of EP0494681B1 publication Critical patent/EP0494681B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/023—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the overrunning type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
    • F02N15/046—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer of the planetary type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N2015/061—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement said axial displacement being limited, e.g. by using a stopper

Definitions

  • This invention relates to a starter device in which rotation of the armature shaft of a DC motor is applied through a speed reducer or directly to the output shaft, and rotation of the output shaft is transmitted through an over-running clutch to a pinion thereby to start the engine.
  • Fig. 2 is a longitudinal sectional view showing essential components of a conventional starter device which has been disclosed, for instance, by Japanese Utility Model Application Publication No. 53727/1980 or US-A-4 902 905 which forms the basis for the preamble of claim 1.
  • Fig. 2 is a longitudinal sectional view showing essential components of a conventional starter device which has been disclosed, for instance, by Japanese Utility Model Application Publication No. 53727/1980 or US-A-4 902 905 which forms the basis for the preamble of claim 1.
  • reference numeral 1 designates a DC motor, the armature shaft 2 of which is extended into an output shaft 3; 4, a helical spline gear formed on the output shaft 3, the helical spline gear being made up of a plurality of elongated grooves or keyways 4a spaced at equal angular intervals and a plurality of auxiliary through keyways 4b each formed between two adjacent keyways 4a; 5, a stopper formed on the output shaft with an annular groove 6 between the stopper 5 and helical spline gear 4, the stopper 5 having through keyways 5a which communicate with those 4b of the helical spline gear 4 (the helical spline gear 4 and the stopper 5 shown in Fig. 3 in more detail); 7, the front bracket of the DC motor 1; and 8, a partition board.
  • reference numeral 10 designates an over-running clutch mounted on the output shaft 3.
  • the over-running clutch 10 comprises a clutch outer 11 and a clutch inner 12.
  • the clutch outer 11 has helical spline keys 11a formed in its inner cylindrical wall which are engaged with the keyways 4a of the helical spline gear 4 of the output shaft 3.
  • the clutch inner 12 transmits rotation in one direction with the aid of a plurality of rollers 13.
  • the clutch inner 12 has a cylindrical portion 12a extended forwardly, and a pinion 14 is cut integral with the cylindrical portion 12a.
  • the cylindrical portion 12a of the clutch inner 12 is supported through a bearing 15 on the front bracket 7, and supports the front end portion of the output shaft 3 through a bearing 13. Since the cylindrical portion 12a of the clutch inner 12 is supported through the bearing 15 as was described above, the outside diameter thereof should be equal to or larger than the outside diameter of the pinion 14. Thus, the clutch inner is relatively large in weight.
  • reference numeral 17 designates an electro-magnetic switch mounted on the front bracket.
  • the exciting coil (not shown) of the electro-magnetic switch 17 When the exciting coil (not shown) of the electro-magnetic switch 17 is energized, the plunger 18 is magnetically retracted or moved backwardly.
  • the plunger 18 is engaged with the upper end portion of a shift lever 19 in the form of a fork, the lower end portion of which is engaged with the over-running clutch 10 to move the latter in an axial direction. That is, when the shift lever 19 is turned counterclockwise, the over-running clutch 10 is moved forwardly; and when it is turned clockwise, the clutch is moved backwardly.
  • reference numeral 20 designates a torsion spring which is adapted to restore the shift lever 19 by turning it clockwise, and thereby to return the plunger 18 to its original position; and 21, the ring gear of the engine with which the pinion 14 meshes when moved forwardly.
  • the above-described over-running clutch 10 is mounted on the output shaft 3 as follows:
  • the helical spline keys 11a of the clutch outer 11 are passed through the through keyways 5a of the stopper 5 and then the through keyways 4b of the helical spline gear 4.
  • the clutch outer 11 is turned by a half pitch of the keys 11a until the keys 11a are set in alignment with the keyways 4a of the helical spline gear 4 on the output shaft 3.
  • the clutch outer is moved forwardly, so that the clutch outer and the output shaft are coupled to each other by helical spline engagement.
  • the front end faces of the keys 11a of the clutch outer 11 abut against the rear end step of the stopper 5, thus inhibiting the forward movement of the clutch outer 11.
  • the above-described conventional starter device is however disadvantageous in the following points: That is, in the starter device, the cylindrical portion 12a of the clutch inner 12 is large in outside diameter, and therefore the clutch inner is large in weight, as a result of which the pinion 14 is not smoothly engaged with the ring gear 21.
  • the helical spline keys 10a of the clutch outer 11 are engaged with the keyways 4a after passing through the through keyways 4b, and then the clutch outer is moved forwardly.
  • a starter device comprising: an output shaft to which rotation of the armature shaft of a DC motor is transmitted, said output shaft having a helical spline gear; an over-running clutch including a clutch outer coupled to said output shaft through said helical spline gear, and a clutch inner which is coupled to said clutch outer through rollers to transmit rotation in one direction to a pinion provided on the front end portion thereof, said over-running clutch being adapted to move said pinion forwardly and backwardly; and a stopper formed on said output shaft in front of said helical spline gear, to stop the forward movement of said clutch outer at a predetermined position, said clutch inner having a cylindrical portion extended forwardly which is supported through a bearing on the front bracket of said DC motor, said cylindrical portion having an inner periphery on/in which a bearing is mounted/fitted in such a manner that a portion of said output shaft in front of said stopper is forwardly movably supported by said bearing; characterised in that the inside diameter of
  • the cylindrical portion of the clutch inner covers the helical spline gear and the stopper for the clutch outer which are formed on the output shaft, so that the overrunning clutch is reduced in length. Furthermore, since the cylindrical portion of the clutch inner is smaller in outside diameter than the rear end portion thereof, the clutch inner is reduced in weight as much, with the result that the axial moving member can be readily moved in the forward direction, thus allowing the pinion mounted on it to smoothly mesh with the ring gear of the engine.
  • Fig. 1 is a longitudinal sectional view showing essential components of one example of a starter device according to this invention.
  • the starter device as shown in Fig. 1, comprises a DC motor 30, from the armature of which an armature shaft 31 is extended. A small gear, namely, a sun gear 31a is cut integral with the front end portion of the armature shaft 31.
  • the starter device further comprises: a yoke 31; an intermediate bracket 33 which supports the front end portion of the armature shaft 31 through a bearing 34; and a front bracket 35 coupled to the yoke 32 through the intermediate bracket 33.
  • reference numeral 36 designates an output shaft coupled through a steel ball 37 to the front end of the armature shaft 31 in such a manner that the former 36 is coaxial with the latter 31.
  • a helical spline gear 37 is formed on the middle portion of the output shaft.
  • the output shaft has an annular groove 38 and a stopper 39 for the clutch outer in front of the helical spline gear 37.
  • the helical spline gear 37 is made up of a plurality of elongated grooves, namely, keyways 37a spaced at equal angular intervals, and through keyways 37b each formed between two adjacent keyways 37a.
  • the stopper 39 has a through cut 39a which is communicated with the through keyways 37b.
  • the output shaft 36 has a clearance groove 36b smaller in diameter at the rear of the helical spline gear 37.
  • the starter device further comprises a planetary gear type speed reducer 40 which is designed as following.
  • a plurality of planet gears 41 are engaged with the sun gear 31a and supported through bearings 43 by support pins 42, which are fixedly embedded in a carrier 36a which is a flange formed on the output shaft 36 the rear end.
  • An internal gear frame 44 is fixedly secured inside the front bracket 35, and has an internal gear 44a cut integral with the inner cylindrical wall.
  • the internal gear 44a is engaged with the planet gears 41 to revolve them.
  • the front end portion of the internal gear frame 44 supports the rear end portion of the output shaft 36 through a bearing 46 inserted thereinto.
  • the starter device further comprises an overrunning clutch 47 which includes a clutch outer 48 and a clutch inner 49.
  • the clutch outer 48 has helical spline keys 48a which are engaged with the keyways 37a of the helical spline gear 47 on the output shaft 36.
  • the clutch inner 49 is coupled to the clutch outer 48 through rollers 50 to transmit rotation in one direction.
  • the clutch inner 49 has a middle portion 49a the inside diameter of which is made slightly larger than the outside diameters of the helical spline gear 37 and the stopper 39 so as to cover the latter 37 and 39.
  • the outside diameter of the middle portion 49a is larger than that of the rear end portion of the clutch inner, so as to reduce the weight of the clutch inner.
  • the clutch inner 49 is supported through a bearing 52 on the front bracket 35.
  • the reference numeral 51 designates an engaging ring having a rear end provided with an engagement projection 51b, the engaging ring 51 and clutch outer 48 together defining an annular engagement groove 51c between the engagement projection 51b and the clutch outer 48; and 57 designates a snap ring mounted on the output shaft 36 to abut against the rear end of the clutch outer 48.
  • reference numeral 54 designates a pinion coupled to the front end portion of the clutch inner 49 by spline connection.
  • a stopper 55 holds the pinion 54 at the front end, which is urged forwardly by a compression spring 56.
  • the overrunning clutch 47 thus constructed is mounted on the output shaft 36 as follows:
  • the helical spline keys 48a of the clutch outer 48 of the overrunning clutch 47 are moved to the clearance groove 36b after passing through the through cuts 39a of the stopper 39 and through the through keyways 37b of the helical line gear 37.
  • the clutch outer 48 is turned as much as a half of the pitch of the helical spline keys 48a until the keys are set in alignment with the keyways 37a of the helical spline gear 37 of the output shaft 36.
  • the clutch outer is moved forwardly, so that the clutch outer and the output shaft are coupled to each other by spline connection.
  • the starter device further comprises a shift lever 58 having a lower end part engaged within the annular lug groove 51c for moving the overrunning clutch 47 forwardly and backwardly. More specifically, the shift lever 58 is turned clockwise or counterclockwise respectively by the backward or forward movement of the hook coupled to the plunger of an electromagnetic switch (not shown) (sic). A closing member 59 of rubber is fitted in a cut formed in the front bracket 35.
  • the operation of the starter device thus designed is the same as that of the above-described conventional starter device except that, in the former, the rotation of the armature shaft 31 is transmitted through the planetary gear type speed reducer to the pinion 54.
  • the embodiment includes the planetary gear type speed reducer 40; however, it should be noted that the technical concept of the invention is applicable also to a starter device in which no planetary gear type speed reducer is employed, and the extension of the armature shaft is employed as the output shaft.
  • the inner diameter of the cylindrical portion of the clutch inner is made slightly larger than the outside diameters of the helical spline gear and the stopper for the clutch outer which are formed on the output shaft, so as to cover them. Therefore, the over-running clutch is reduced in length as much; that is, it is small in axial dimension. Furthermore, since the cylindrical portion of the clutch inner is smaller in outside diameter than the rear end portion thereof, and the pinion is mounted on the front end portion of the clutch inner which is made smaller than the cylindrical portion, the clutch inner is reduced in weight as much, with the result that the axial moving member can be readily moved in the forward direction, thus allowing the pinion mounted on it to smoothly mesh with the ring gear of the engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP19920100335 1991-01-11 1992-01-10 Starter device Expired - Lifetime EP0494681B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1991003707U JP2538599Y2 (ja) 1991-01-11 1991-01-11 スタータ装置
JP3707/91 1991-01-11

Publications (2)

Publication Number Publication Date
EP0494681A1 EP0494681A1 (en) 1992-07-15
EP0494681B1 true EP0494681B1 (en) 1995-04-05

Family

ID=31732871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920100335 Expired - Lifetime EP0494681B1 (en) 1991-01-11 1992-01-10 Starter device

Country Status (4)

Country Link
EP (1) EP0494681B1 (zh)
JP (1) JP2538599Y2 (zh)
DE (1) DE69201872T2 (zh)
HK (1) HK1005319A1 (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2774730B2 (ja) * 1992-03-19 1998-07-09 三菱電機株式会社 始動電動機
CN1050650C (zh) * 1994-04-28 2000-03-22 三菱电机株式会社 起动器电动机
JPH08291783A (ja) * 1995-04-20 1996-11-05 Mitsubishi Electric Corp 遊星歯車減速スタータ装置
US6169333B1 (en) 1997-10-06 2001-01-02 Visteon Global Technologies, Inc. Starter motor drive stop
DE10025720C2 (de) * 2000-05-25 2002-05-29 Walterscheid Gmbh Gkn Antriebsanordnung mit Freilaufkupplung
JP2002221136A (ja) 2001-01-24 2002-08-09 Mitsubishi Electric Corp 始動装置のピニオン抜け止め構造
JP2003148518A (ja) * 2001-11-07 2003-05-21 Musashi Seimitsu Ind Co Ltd ワンウェイクラッチ
FR2850136B1 (fr) * 2003-01-21 2006-05-26 Valeo Equip Electr Moteur Procede de montage d'un anneau d'arret sur un arbre de demarreur electrique muni d'un lanceur avec butee sur cannelures
JP3815446B2 (ja) * 2003-03-11 2006-08-30 株式会社デンソー スタータ
JP5659936B2 (ja) * 2011-04-15 2015-01-28 株式会社デンソー スタータ
CN103244570B (zh) * 2012-02-06 2017-10-17 博世汽车部件(长沙)有限公司 车辆起动机及其花键装置
FR3042231B1 (fr) * 2015-10-09 2019-08-16 Valeo Equipements Electriques Moteur Lanceur de demarreur de vehicule automobile muni d'un capot de protection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2572137B1 (fr) * 1984-10-18 1987-01-23 Paris & Du Rhone Lanceur de demarreur electrique sans contacteur
JPS63219871A (ja) * 1987-03-10 1988-09-13 Mitsubishi Electric Corp スタ−タ装置
JPS63280852A (ja) * 1987-05-13 1988-11-17 Mitsubishi Electric Corp スタ−ティングモ−タ−のピニオンストッパ装置
JPH07703Y2 (ja) * 1987-09-04 1995-01-11 三菱電機株式会社 始動電動機
JPH01170760A (ja) * 1987-12-26 1989-07-05 Mitsubishi Electric Corp スタータモータのピニオンストッパ装置

Also Published As

Publication number Publication date
DE69201872T2 (de) 1995-09-28
EP0494681A1 (en) 1992-07-15
DE69201872D1 (de) 1995-05-11
JPH0495667U (zh) 1992-08-19
HK1005319A1 (en) 1998-12-31
JP2538599Y2 (ja) 1997-06-18

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