EP0494681A1 - Starter device - Google Patents
Starter device Download PDFInfo
- Publication number
- EP0494681A1 EP0494681A1 EP92100335A EP92100335A EP0494681A1 EP 0494681 A1 EP0494681 A1 EP 0494681A1 EP 92100335 A EP92100335 A EP 92100335A EP 92100335 A EP92100335 A EP 92100335A EP 0494681 A1 EP0494681 A1 EP 0494681A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clutch
- output shaft
- helical spline
- spline gear
- 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.)
- Granted
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Classifications
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- 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
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- 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
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- 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.
- 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.
- the foregoing object of the invention has been achieved by the provision of a starter device in which, according to the invention, the inside diameter of the cylindrical portion of the clutch inner is 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, and the outside diameter of the cylindrical portion is smaller than that of the rear end portion, with the over-running clutch being reduced in length.
- the front end portion extended from the cylindrical portion is made smaller in outside diameter than the latter, and a pinion to be engaged with the ring gear of an engine is mounted on the front end portion thus designed.
- 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 over-running 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 over-running 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. Further in Fig. 1, reference numeral 51 designates an engaging ring; and 57 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 over-running 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 over-running 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 for moving the over-running 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)
Abstract
Description
- 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. In Fig. 2,
reference numeral 1 designates a DC motor, thearmature shaft 2 of which is extended into anoutput shaft 3; 4, a helical spline gear formed on theoutput shaft 3, the helical spline gear being made up of a plurality of elongated grooves orkeyways 4a spaced at equal angular intervals and a plurality of auxiliary through keyways 4b each formed between twoadjacent keyways 4a; 5, a stopper formed on the output shaft with anannular groove 6 between thestopper 5 andhelical spline gear 4, thestopper 5 having throughkeyways 5a which communicate with those 4b of the helical spline gear 4 (thehelical spline gear 4 and thestopper 5 shown in Fig. 3 in more detail); 7, the front bracket of theDC motor 1; and 8, a partition board. - Further in Fig. 2,
reference numeral 10 designates an over-running clutch mounted on theoutput shaft 3. The over-runningclutch 10 comprises a clutch outer 11 and a clutch inner 12. The clutch outer 11 hashelical spline keys 11a formed in its inner cylindrical wall which are engaged with thekeyways 4a of thehelical spline gear 4 of theoutput shaft 3. The clutch inner 12 transmits rotation in one direction with the aid of a plurality ofrollers 13. The clutch inner 12 has acylindrical portion 12a extended forwardly, and apinion 14 is cut integral with thecylindrical portion 12a. Thecylindrical portion 12a of the clutch inner 12 is supported through abearing 15 on thefront bracket 7, and supports the front end portion of theoutput shaft 3 through abearing 13. Since thecylindrical portion 12a of the clutch inner 12 is supported through thebearing 15 as was described above, the outside diameter thereof should be equal to or larger than the outside diameter of thepinion 14. Thus, the clutch inner is relatively large in weight. - Further in Fig. 2,
reference numeral 17 designates an electro-magnetic switch mounted on the front bracket. When the exciting coil (not shown) of the electro-magnetic switch 17 is energized, theplunger 18 is magnetically retracted or moved backwardly. Theplunger 18 is engaged with the upper end portion of ashift lever 19 in the form of a fork, the lower end portion of which is engaged with the over-runningclutch 10 to move the latter in an axial direction. That is, when theshift lever 19 is turned counterclockwise, the over-runningclutch 10 is moved forwardly; and when it is turned clockwise, the clutch is moved backwardly. Further in Fig. 2,reference numeral 20 designates a torsion spring which is adapted to restore theshift lever 19 by turning it clockwise, and thereby to return theplunger 18 to its original position; and 21, the ring gear of the engine with which thepinion 14 meshes when moved forwardly. - The above-described over-running
clutch 10 is mounted on theoutput shaft 3 as follows: Thehelical spline keys 11a of the clutch outer 11 are passed through the throughkeyways 5a of thestopper 5 and then the through keyways 4b of thehelical spline gear 4. Thereafter, at a smalldiameter clearance groove 3a formed in the rear end portion of theoutput shaft 3, the clutch outer 11 is turned by a half pitch of thekeys 11a until thekeys 11a are set in alignment with thekeyways 4a of thehelical spline gear 4 on theoutput shaft 3. Under this condition, the clutch outer is moved forwardly, so that the clutch outer and the output shaft are coupled to each other by helical spline engagement. In this case, the front end faces of thekeys 11a of the clutch outer 11 abut against the rear end step of thestopper 5, thus inhibiting the forward movement of the clutch outer 11. - Now, the operation of the starter device thus constructed will be described. Upon energization of the exciting coil (not shown) of the electro-
magnetic switch 17, the plunger is moved inwardly, to turn theshift lever 19 counterclockwise in Fig. 2. As a result, the over-runningclutch 10 is moved forwardly to cause thepinion 14 to mesh with thering gear 21. When theplunger 18 is moved backwardly as was described above, the movable contact of the electromagnetic switch is also moved backwardly, to engage with the pair of stationary contacts thereof, thus completing the armature circuit of theDC motor 1. As a result, the armature is rotated, and the rotation of thearmature shaft 2; that is, the rotation of theoutput shaft 3 integral with thearmature shaft 2 is transmitted through the over-runningclutch 10 to thepinion 14 to rotate thering gear 21, thereby to start the engine. - 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 thepinion 14 is not smoothly engaged with thering gear 21. In order to mount the over-runningclutch 10 on theoutput shaft 3, the helical spline keys 10a of the clutch outer 11 are engaged with thekeyways 4a after passing through the through keyways 4b, and then the clutch outer is moved forwardly. Hence, it is necessary to space the rear end of the clutch inner 12 from thestopper 5 as much as L, and accordingly the over-runningclutch 10 is extended forwardly as much, with the result that the starter device is relatively large in axial length. - Accordingly, it is an object of this invention to eliminate the above-described difficulties accompanying a conventional starter device. More specifically, it is an object of the invention to provide a starter device in which the clutch inner is reduced in weight to allow the pinion to smoothly engage with the ring gear of the engine, and the over-running clutch is decreased in length, with the result that the starter device itself is reduced in axial length.
- The foregoing object of the invention has been achieved by the provision of a starter device in which, according to the invention, the inside diameter of the cylindrical portion of the clutch inner is 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, and the outside diameter of the cylindrical portion is smaller than that of the rear end portion, with the over-running clutch being reduced in length. The front end portion extended from the cylindrical portion is made smaller in outside diameter than the latter, and a pinion to be engaged with the ring gear of an engine is mounted on the front end portion thus designed.
- In the starter device of the invention, 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 over-running 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.
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- Fig. 1 is a longitudinal sectional view showing essential components of one example of a starter device according to this invention;
- Fig. 2 is also a longitudinal sectional view showing essential components of a conventional starter device; and
- Fig. 3 is an enlarged diagram showing a helical spline gear and a stopper formed on the output shaft of the starter device shown in Fig. 2.
- 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 anarmature shaft 31 is extended. A small gear, namely, asun gear 31a is cut integral with the front end portion of thearmature shaft 31. The starter device further comprises: ayoke 31; anintermediate bracket 33 which supports the front end portion of thearmature shaft 31 through abearing 34; and afront bracket 35 coupled to theyoke 32 through theintermediate bracket 33. - Further in Fig. 1,
reference numeral 36 designates an output shaft coupled through asteel ball 37 to the front end of thearmature shaft 31 in such a manner that the former 36 is coaxial with the latter 31. Ahelical spline gear 37 is formed on the middle portion of the output shaft. The output shaft has anannular groove 38 and astopper 39 for the clutch outer in front of thehelical spline gear 37. Thehelical spline gear 37 is made up of a plurality of elongated grooves, namely,keyways 37a spaced at equal angular intervals, and throughkeyways 37b each formed between twoadjacent keyways 37a. Thestopper 39 has a throughcut 39a which is communicated with the throughkeyways 37b. Theoutput shaft 36 has aclearance groove 36b smaller in diameter at the rear of thehelical spline gear 37. - The starter device further comprises a planetary gear
type speed reducer 40 which is designed as following. A plurality ofplanet gears 41 are engaged with thesun gear 31a and supported throughbearings 43 bysupport pins 42, which are fixedly embedded in acarrier 36a which is a flange formed on theoutput shaft 36 the rear end. Aninternal gear frame 44 is fixedly secured inside thefront bracket 35, and has aninternal gear 44a cut integral with the inner cylindrical wall. Theinternal gear 44a is engaged with theplanet gears 41 to revolve them. The front end portion of theinternal gear frame 44 supports the rear end portion of theoutput shaft 36 through abearing 46 inserted thereinto. - The starter device further comprises an over-running 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 thekeyways 37a of the helical spline gear 47 on theoutput 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 thehelical spline gear 37 and thestopper 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 abearing 52 on thefront bracket 35. Further in Fig. 1,reference numeral 51 designates an engaging ring; and 57 a snap ring mounted on theoutput shaft 36 to abut against the rear end of the clutch outer 48. - Further in Fig. 1,
reference numeral 54 designates a pinion coupled to the front end portion of the clutch inner 49 by spline connection. Astopper 55 holds thepinion 54 at the front end, which is urged forwardly by acompression spring 56. - The over-running clutch 47 thus constructed is mounted on the
output shaft 36 as follows: Thehelical spline keys 48a of the clutch outer 48 of the over-running clutch 47 are moved to theclearance groove 36b after passing through the throughcuts 39a of thestopper 39 and through the throughkeyways 37b of thehelical line gear 37. Under this condition, the clutch outer 48 is turned as much as a half of the pitch of thehelical spline keys 48a until the keys are set in alignment with thekeyways 37a of thehelical spline gear 37 of theoutput shaft 36. Thereafter, the clutch outer is moved forwardly, so that the clutch outer and the output shaft are coupled to each other by spline connection. Under this condition, asnap ring 57 is fitted on theoutput shaft 36 to determine the rearward position of the clutch outer 48. When, under this condition, the over-running clutch 47 is moved forwardly, then the front end faces of thekeys 48a of the clutch outer 48 abut against thestopper 39, thus determining the forward movement of the clutch outer. - The starter device further comprises a shift lever 58 for moving the over-running 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 thefront 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 thepinion 54. - As was described above, 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. - In the starter device of the invention, 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.
Claims (2)
- 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 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;
wherein the inside diameter of said cylindrical portion of said clutch inner is slightly larger than the outside diameters of said helical spline gear and stopper on said output shaft so as to allow said cylindrical portion to cover at least a portion of said helical spline gear and stopper. - A starter device according to claim 1, wherein the outside diameter of said cylindrical portion of said clutch inner is smaller than that of the rear end portion thereof, and the outside diameter of the front end portion extended from said cylindrical portion is smaller than that of said cylindrical portion, and said pinion is mounted on said front end portion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991003707U JP2538599Y2 (en) | 1991-01-11 | 1991-01-11 | Starter device |
JP3707/91 | 1991-01-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0494681A1 true EP0494681A1 (en) | 1992-07-15 |
EP0494681B1 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 (en) |
JP (1) | JP2538599Y2 (en) |
DE (1) | DE69201872T2 (en) |
HK (1) | HK1005319A1 (en) |
Cited By (11)
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EP0562475A1 (en) * | 1992-03-19 | 1993-09-29 | Mitsubishi Denki Kabushiki Kaisha | Starting motor |
CN1050650C (en) * | 1994-04-28 | 2000-03-22 | 三菱电机株式会社 | Starter motor |
DE19607514C2 (en) * | 1995-04-20 | 2000-06-08 | Mitsubishi Electric Corp | Starter |
US6169333B1 (en) | 1997-10-06 | 2001-01-02 | Visteon Global Technologies, Inc. | Starter motor drive stop |
FR2819862A1 (en) * | 2001-01-24 | 2002-07-26 | Mitsubishi Electric Corp | STRUCTURE FOR PREVENTING THE EXHAUST OF A PINION IN A STARTER |
US6540055B2 (en) * | 2000-05-25 | 2003-04-01 | Gkn Walterscheid Gmbh | Driving arrangement with a free-wheel coupling |
FR2850136A1 (en) * | 2003-01-21 | 2004-07-23 | Valeo Equip Electr Moteur | Retaining ring mounting process for automobile electric starter, involves mounting ring on axial shaft situated between positioning groove and splines with abutments, and moving launcher axially to drive ring till groove |
US6796413B2 (en) * | 2001-11-07 | 2004-09-28 | Musashi Seimitsu Kogyo Kabushiki Kaisha | One-way clutch |
EP1457669A3 (en) * | 2003-03-11 | 2005-11-09 | Denso Corporation | Starter with stopper on clutch inner portion of one-way clutch |
EP2812563A4 (en) * | 2012-02-06 | 2016-02-17 | Bosch Automotive Prod Changsha | Vehicle starter and spline assembly thereof |
WO2017060614A1 (en) * | 2015-10-09 | 2017-04-13 | Valeo Equipements Electriques Moteur | Motor vehicle starter motor starter drive assembly with protective cap |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5659936B2 (en) * | 2011-04-15 | 2015-01-28 | 株式会社デンソー | Starter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2572137A1 (en) * | 1984-10-18 | 1986-04-25 | Paris & Du Rhone | Contactorless electric starter engagement system |
FR2613777A1 (en) * | 1987-03-10 | 1988-10-14 | Mitsubishi Electric Corp | STARTER FOR MOTOR VEHICLE |
US4902905A (en) * | 1987-12-26 | 1990-02-20 | Mitsubishi Denki Kabushiki Kaisha | Pinion stopper arrangement for starter motor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63280852A (en) * | 1987-05-13 | 1988-11-17 | Mitsubishi Electric Corp | Pinion stopper device for starting motor |
JPH07703Y2 (en) * | 1987-09-04 | 1995-01-11 | 三菱電機株式会社 | Starter motor |
-
1991
- 1991-01-11 JP JP1991003707U patent/JP2538599Y2/en not_active Expired - Lifetime
-
1992
- 1992-01-10 DE DE1992601872 patent/DE69201872T2/en not_active Expired - Lifetime
- 1992-01-10 EP EP19920100335 patent/EP0494681B1/en not_active Expired - Lifetime
-
1998
- 1998-03-03 HK HK98101651A patent/HK1005319A1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2572137A1 (en) * | 1984-10-18 | 1986-04-25 | Paris & Du Rhone | Contactorless electric starter engagement system |
FR2613777A1 (en) * | 1987-03-10 | 1988-10-14 | Mitsubishi Electric Corp | STARTER FOR MOTOR VEHICLE |
US4902905A (en) * | 1987-12-26 | 1990-02-20 | Mitsubishi Denki Kabushiki Kaisha | Pinion stopper arrangement for starter motor |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5370009A (en) * | 1992-03-19 | 1994-12-06 | Mitsubishi Denki Kabushiki Kaisha | Starting motor |
EP0562475A1 (en) * | 1992-03-19 | 1993-09-29 | Mitsubishi Denki Kabushiki Kaisha | Starting motor |
CN1050650C (en) * | 1994-04-28 | 2000-03-22 | 三菱电机株式会社 | Starter motor |
DE19607514C2 (en) * | 1995-04-20 | 2000-06-08 | Mitsubishi Electric Corp | Starter |
US6169333B1 (en) | 1997-10-06 | 2001-01-02 | Visteon Global Technologies, Inc. | Starter motor drive stop |
US6540055B2 (en) * | 2000-05-25 | 2003-04-01 | Gkn Walterscheid Gmbh | Driving arrangement with a free-wheel coupling |
FR2819862A1 (en) * | 2001-01-24 | 2002-07-26 | Mitsubishi Electric Corp | STRUCTURE FOR PREVENTING THE EXHAUST OF A PINION IN A STARTER |
US7159480B2 (en) | 2001-01-24 | 2007-01-09 | Mitsubishi Denki Kabushiki Kaisha | Pinion slip-off preventive structure of starting apparatus |
US6796413B2 (en) * | 2001-11-07 | 2004-09-28 | Musashi Seimitsu Kogyo Kabushiki Kaisha | One-way clutch |
WO2004067950A1 (en) * | 2003-01-21 | 2004-08-12 | Valeo Equipements Electriques Moteur | Method of mounting a retaining ring on an electric starter shaft comprising a starter drive assembly and corresponding starter |
FR2850136A1 (en) * | 2003-01-21 | 2004-07-23 | Valeo Equip Electr Moteur | Retaining ring mounting process for automobile electric starter, involves mounting ring on axial shaft situated between positioning groove and splines with abutments, and moving launcher axially to drive ring till groove |
US7721613B2 (en) | 2003-01-21 | 2010-05-25 | Valeo Equipements Electriques Moteur | Method of mounting a retaining ring on an electric starter shaft comprising a starter drive assembly and corresponding starter |
EP1457669A3 (en) * | 2003-03-11 | 2005-11-09 | Denso Corporation | Starter with stopper on clutch inner portion of one-way clutch |
US7305899B2 (en) | 2003-03-11 | 2007-12-11 | Denso Corporation | Starter with stopper on clutch inner portion of one-way clutch |
EP2812563A4 (en) * | 2012-02-06 | 2016-02-17 | Bosch Automotive Prod Changsha | Vehicle starter and spline assembly thereof |
WO2017060614A1 (en) * | 2015-10-09 | 2017-04-13 | Valeo Equipements Electriques Moteur | Motor vehicle starter motor starter drive assembly with protective cap |
FR3042231A1 (en) * | 2015-10-09 | 2017-04-14 | Valeo Equip Electr Moteur | MOTOR VEHICLE STARTER LAUNCHER WITH PROTECTIVE HOOD |
Also Published As
Publication number | Publication date |
---|---|
JP2538599Y2 (en) | 1997-06-18 |
DE69201872T2 (en) | 1995-09-28 |
DE69201872D1 (en) | 1995-05-11 |
HK1005319A1 (en) | 1998-12-31 |
EP0494681B1 (en) | 1995-04-05 |
JPH0495667U (en) | 1992-08-19 |
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