CN1050650C - Starter motor - Google Patents
Starter motor Download PDFInfo
- Publication number
- CN1050650C CN1050650C CN94104843A CN94104843A CN1050650C CN 1050650 C CN1050650 C CN 1050650C CN 94104843 A CN94104843 A CN 94104843A CN 94104843 A CN94104843 A CN 94104843A CN 1050650 C CN1050650 C CN 1050650C
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- CN
- China
- Prior art keywords
- small gear
- pinion shaft
- starter motor
- gear
- pinion
- 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
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- Y02T10/48—
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The present invention relates to a cantilever type starter motor. The inner periphery in the front of a pinion 5 is engaged with spline fine teeth 2a formed in the front of a pinion shaft 2; springs 8 are arranged on a circular bead part of the pinion 5 so as to push the pinion 5 to a pinion retainer ring 6; the inner periphery of the rear part 5a of the pinion 5 contacts an outside diameter part 2b of the pinion shaft in a sliding mode, and thus, the pinion is engaged with a ring gear of the motor without inclination.
Description
The present invention relates to a kind of on an output shaft that is installed in the cantilever type starter motor small gear and the improvement of the engagement between the ring gear.
Fig. 4 be as Japanese uncensored patent publications No.97576/1991 in the cross-sectional view of pith of output terminal of disclosed a kind of conventional boom-mounted starter motor.
In Fig. 4, label 1 marks an overload clutch, and wherein, the clutch outside is connected by spline with a rotating output shaft.The moment that produces in the clutch outer end is passed to the clutch inside that becomes one with pinion shaft 2 by roller bearing or similar thing.Pinion shaft 2 is supported, so that can slide vertically by means of the ball bearing 3 that is assemblied on the fore poppet 4.A small gear 5 is connected with spline with a straight spline 2a, and this spline 2a processes on the pinion shaft 2 of ball bearing 3 front ends.The cantilever type starter motor originates from a kind of structure, and in this structure, small gear 5 is positioned at the front of the part that is used to support rotatingshaft.
Small gear back-up ring 6 and ring 7 are oriented to travel forward in order to restriction small gear 5.By spring 8, small gear 5 is pushed to small gear back-up ring 6.
Gap between the periphery 2b that letter X represents at pinion shaft and the interior all 5a at small gear rear portion is made as this gap about 0.55mm usually.Letter Y represents the gap between the interior week of the periphery of small gear 5 and fore poppet 4, and this gap often is set as about 1.5mm.
To narrate the operation of traditional starter motor below.
When being attracted when switch coil (do not have show) thereby by the plunger 9 of excitation magnetic switch, lever 10 is around rotating counterclockwise, and overload clutch 1 is pushed away forward.Like this, when pinion shaft 2 was supported by bearing 3, small gear 2 was just moved forward slidably.The slip of pinion shaft 2 makes the end face of the small gear 5 that is connected with pinion shaft 2 splines with ring gear 11 contacts.Like this, small gear 5 and ring gear 11 engagements, spring 8 also tilts thereupon.
Thereafter, a switch contact (not showing) is closed with the actuating motor axle and rotates, and the rotatory force of motor reel is delivered to overload clutch 1.The rotatory force of the pinion shaft 2 of formation overload clutch 1 part is passed to small gear 5 by the serration of spline 2a, and the ring gear 11 of motor is rotated.
The engagement of small gear 5 and ring gear 11 is by using an auxiliary rotary type interlock mechanism to finish, this mechanism so moves, promptly when the end face of small gear 5 contacts with the end face of ring gear 11, the main contactor of switch (not having to show) is not closed, but the electric current that flows in the switch field coil is provided for a motor (not showing), so motor produces a moment, this moment causes rotation by the friction that overcomes between the end face of small gear 5 and ring gear 11.Like this, small gear 5 is turned over a pitch by this moment, so small gear 5 just is meshed with ring gear 11.When small gear 5 and ring gear 11 during along whole facewidth engagement, the main contactor of switch is closed and produce a full starting torque.So ring gear 11 rotates.
In having traditional starter motor of said structure, the small gear 5 that is positioned on the pinion shaft 2 has following point.When small gear 5 during with ring gear 11 engagements, the inclination of small gear 5 depends primarily at the bottom of the tooth top, tooth of the serration of spline 2a or the flank of tooth, i.e. the inclination of small gear 5 is just by the auxiliary section branch restriction in the serration of spline 2a.Because serration has the gap (particularly, spline is formed by rolling or cold forging, therefore limit to the improvement of its machining accuracy), and the size of gap x relatively has 0.55mm so big, therefore a kind of tendency is arranged, that is, when the end face that makes small gear 5 with ring gear 11 contacts, spring 8 is tilted (as shown in Figure 5).
When spring 8 tilts, between small gear 5 and ring gear 11, on their end face, just cause a contact condition.The part of some contact is easy to cause damage between small gear 5 and ring gear 11, and when the moment that small gear 5 is rotated a pitch produced, the friction factor on the point of contact tended to increase.Therefore, be difficult to obtain the rotation of a pitch of small gear, thereby starting failure might occur.In addition, even after small gear 5 and ring gear 11 engagements, because small gear 5 is loosening, the moment transmission of the flank of tooth by small gear 5 can not stablized yet, and this can cause the noise of the small gear flank of tooth and the generation of wearing and tearing.
Owing to the load on the flank of tooth that acts on small gear 5 is born by the thin tooth part of pinion shaft 2 by spline serration 2a, at the bearing 3 that is used to support pinion shaft 2 and the span L i between the point under the load just as shown in Figure 5, to such an extent as to be problematic from the intensity viewpoint of pinion shaft.
In addition, the inclination of small gear 5 can cause the interference between the circumferential portion 4a in the periphery of small gear 5 and fore poppet.Therefore, must determine the value of gap Y more greatly.When gap Y was done greatly, dust reduction capability reduced, and dust is attached to the external peripheral surface of pinion shaft 2 like this.This may cause the slip fault of pinion shaft 2.
In EP0562475, disclose a kind of starter motor, yet the purpose of this starter motor is to shorten the axial length of starter motor, can not prevent the inclination of small gear.
The purpose of this invention is to provide a kind of cantilever type starter motor, wherein can improve the engagement of the small gear and a ring gear of the output terminal that is placed in starter motor.
By providing a kind of starter motor can reach the above and other objects of the present invention district, this starter motor comprises a fore poppet, a pinion shaft that supports slidably by fore poppet by between pinion shaft and fore poppet, inserting a bearing, and on pinion shaft that is positioned at the bearing front end, so that when small gear is pushed away forward, produce the small gear of engagement with the ring gear of motor, wherein, the splined section engagement that the fore-end in week and a end at pinion shaft form in the small gear; One is inserted in a spring that is formed between the shoulder part that shoulder part and on the pinion shaft is formed on the intermediate portion in week in the small gear, small gear is pushed to the small gear back-up ring, and the rear portion in week is processed to excircle sliding contact with pinion shaft in the small gear, the value in the gap between the periphery of the internal surface of fore poppet and small gear is about 1.0 millimeters or littler, thereby the control small gear is in radially motion.
According to starter motor of the present invention, be installed in the outer radius portion sliding contact of the sliding parts of interior week at rear portion of small gear of pinion shaft end and pinion shaft, thereby small gear is controlled in motion radially.Like this, when small gear contacts with internal gear, avoid the inclination of small gear, and between small gear and ring gear, can contact by maintenance face, thereby avoided occurring the crack.In addition, the friction that the moment of a pitch of pinion rotation is produced can be reduced, and guarantees engagement stably.
When linking consideration with accompanying drawing, with reference to following being described in detail, thing becomes better understood.At this moment, will obtain of the present invention more fully the evaluation and many bonus easily.Wherein:
Fig. 1 is the longitudinal cross-section figure according to an embodiment's of a starter motor of the present invention pith;
Fig. 2 is a longitudinal cross-section figure of starter motor of the present invention, represents the engagement between small gear and the ring gear in the figure;
Fig. 3 is the longitudinal cross-section figure according to another embodiment's of a starter motor of the present invention pith;
The longitudinal cross-section figure of a traditional starter motor of Fig. 4;
Fig. 5 is the longitudinal cross-section figure of traditional starter motor, represents the engagement between small gear and the ring gear in the figure; And
Fig. 6 is the longitudinal cross-section figure of another traditional starter motor of expression.
Most preferred embodiment according to cantilever type starter motor of the present invention is described with reference to the accompanying drawings.Fig. 1 represents an output terminal of cantilever type starter motor according to an embodiment of the invention, in the figure, label 1 indicates an overload clutch, and label 2 indicates a pinion shaft, label 3 indicates a bearing, label 4 indicates a fore poppet, and label 5 indicates a small gear, and label 6 indicates a small gear back-up ring, label 7 indicates a ring, label 8 indicates a spring, and label 9 indicates a plunger, and label 10 indicates a lever.The structure of these elements is the same with the structure of traditional starter motor shown in Figure 4.
In most preferred embodiment shown in Figure 1, gap x between the external diameter 2b of interior all 5a at the rear portion that is loaded on the small gear 5 on the pinion shaft 2 and pinion shaft 2 is defined as very little value (being about 0.05mm), and the external diameter 2b of interior all 5a at the rear portion of small gear 5 and pinion shaft 2 is under the sliding contact state like this.By determining gap X to keep the micro-gap between small gear 5 and the pinion shaft 2, the inclination of small gear 5 just is restricted.Particularly when small gear 5 when ring gear on being installed in motor is meshed, interior all 5a at the rear portion that the inclination of small gear 5 just can be by small gear 5 avoid with respect to the slip of the outer radius portion 2b of pinion shaft.
With the mode same with traditional starter motor, the week that is positioned at small gear is meshed with the spline 2a of the fore-end that is formed at pinion shaft 2, and spring 8 is set at the shoulder part at the interior all middle parts that are formed at small gear 5 and is formed between the shoulder part of pinion shaft 2.In the present invention because gap x is confirmed as having micro-gap, spring 8 just between the shoulder part of the shoulder part of small gear 5 and pinion shaft 2, tilt cannot, and this spring pressurized always.
In addition, can between the periphery of the internal surface 4a of fore poppet 4 and small gear 5, determine a gap Y who has as the smaller value about 1.0mm.
Fig. 2 represents the contact condition between small gear 5 and ring gear 11 in the foregoing description.When small gear 5 begins to contact with ring gear, because the inclination of small gear 5 is limited by the slip of the interior week at small gear 5 rear portions with respect to the outer radius portion of pinion shaft 2, therefore small gear 5 has only very little inclination, and small gear 5 can slide reposefully at the end face of ring gear 11, like this, meshing performance just obtains improving.
In addition, because uneven power does not act on the thin tooth part of spline 2a, the uneven wear on small gear and/or spline 2a serration just can be excluded.
Because the load that acts on the small gear 5 is born by the spline serration 2a of pinion shaft with in the interior week at small gear rear portion and the slide part branch between the pinion shaft, so, compare with the length of the span L i of traditional starter motor (Fig. 5), Mean length with respect to the span L j of bearing 3 can reduce, like this, the moment of flexure on bearing just can reduce.
In addition, by the inclination of small gear 5 being reduced to minimum, the gap Y that forms between the periphery 5b of small gear and fore poppet internal surface 4a can be very little, can avoid the intrusion of exterior materials like this, forms the dust-tight function effectively.
The thin tooth part of spline 2a can be formed by rolling and cold forging.In this case, the external diameter of pinion shaft sliding parts can obtain accurate size whereby by grinding machine or similar devices processing, the precision of eliminating the loosening of 5 pairs of pinion shafts of small gear and improving thin tooth part.
As shown in Figure 6, in traditional starter motor, metalwork 30 is set on the inner circumference of bearing 3, slides reposefully with auxiliary pinion shaft 2.In second embodiment of starter motor of the present invention, the bearing 13 of band oil groove 13a is positioned on the part that is used to support pinion shaft 14, and does not dispose the metalwork (Fig. 3) that is used on traditional starter motor.Like this, by using bearing 13 rather than the metalwork of band oil groove 13a.Because it is big that the cause of the thickness of golden part 30, the diameter of pinion shaft 14 can be determined, and that the gap X between interior all 5a at the periphery 14b of pinion shaft and small gear 5 rear portions can be determined is littler.According to second embodiment of the present invention, can obtain the effect same with first embodiment.
In second embodiment, because the intensity of pinion shaft 14 increases and for spring 8 provides big that the shoulder part of seat can be determined, the insertion performance of spring 8 can be enhanced, and spring 8 and inclination also can be avoided.
According to the present invention, the meshing performance of small gear can be improved, and the wear resistance of small gear can be improved, improve spline serration and internal gear, like this, can prolong the life-span of these parts.In addition, the moment of flexure of bearing owing to the pinion shaft that is positioned at bearing part can reduce, and the intensity of pinion shaft is enhanced.Moreover, improved the anti-dust performance of bearing.
Obviously, according to top telling about, many improvement of the present invention and variation all are possible.Therefore should be appreciated that within the purpose of appended claims, unless specify, the present invention can implement in this book.
Claims (2)
1. starter motor, comprise a fore poppet, a pinion shaft that supports slidably by fore poppet by between pinion shaft and fore poppet, inserting a bearing, and on pinion shaft that is positioned on the bearing front end, so that when small gear is pushed away forward, produce the small gear of engagement with the ring gear of motor, it is characterized in that, the splined section engagement that the fore-end in week and a end at pinion shaft form in the small gear; One is inserted in a spring that is formed between the shoulder part that shoulder part and on the pinion shaft is formed on the intermediate portion in week in the small gear, small gear is pushed to the small gear back-up ring, and the rear portion in week is processed to excircle sliding contact with pinion shaft in the small gear, the value in the gap (Y) between the periphery of the internal surface of fore poppet and small gear is about 1.0 millimeters or littler, thereby the control small gear is in radially motion.
2. according to the starter motor of claim 1, it is characterized in that, at oil groove that is used to support pinion shaft of interior week formation of bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94104843A CN1050650C (en) | 1994-04-28 | 1994-04-28 | Starter motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94104843A CN1050650C (en) | 1994-04-28 | 1994-04-28 | Starter motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1111004A CN1111004A (en) | 1995-11-01 |
| CN1050650C true CN1050650C (en) | 2000-03-22 |
Family
ID=5031773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94104843A Expired - Lifetime CN1050650C (en) | 1994-04-28 | 1994-04-28 | Starter motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050650C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837651A (en) * | 2017-02-28 | 2017-06-13 | 上海法雷奥汽车电器系统有限公司 | The little gear detent mechanism and starter of a kind of starter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008002115A1 (en) * | 2008-05-30 | 2009-12-03 | Robert Bosch Gmbh | Free-launching starter |
| CN102254718B (en) * | 2011-06-30 | 2014-01-15 | 无锡市凯旋电机有限公司 | Electrically or automatically clutched electric operation mechanism |
| CN110821731B (en) * | 2019-12-03 | 2022-03-22 | 福建永强力加动力设备有限公司 | Starting motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0306815A1 (en) * | 1987-08-31 | 1989-03-15 | Mitsubishi Denki Kabushiki Kaisha | Starting electric motor |
| US4818889A (en) * | 1987-05-13 | 1989-04-04 | Mitsubishi Denki Kabushiki Kaisha | Pinion stopper for engine starter motor |
| US4995275A (en) * | 1987-03-26 | 1991-02-26 | Mitsubishi Denki Kabushiki Kaisha | Device for supporting pinion shaft of electric motor for starting engine |
| US5018398A (en) * | 1989-01-18 | 1991-05-28 | Mitsubishi Denki Kabushiki Kaisha | Engine starter with a pinion shifter unit |
| EP0494681A1 (en) * | 1991-01-11 | 1992-07-15 | Mitsubishi Denki Kabushiki Kaisha | Starter device |
| EP0562475A1 (en) * | 1992-03-19 | 1993-09-29 | Mitsubishi Denki Kabushiki Kaisha | Starting motor |
-
1994
- 1994-04-28 CN CN94104843A patent/CN1050650C/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4995275A (en) * | 1987-03-26 | 1991-02-26 | Mitsubishi Denki Kabushiki Kaisha | Device for supporting pinion shaft of electric motor for starting engine |
| US4818889A (en) * | 1987-05-13 | 1989-04-04 | Mitsubishi Denki Kabushiki Kaisha | Pinion stopper for engine starter motor |
| EP0306815A1 (en) * | 1987-08-31 | 1989-03-15 | Mitsubishi Denki Kabushiki Kaisha | Starting electric motor |
| US5018398A (en) * | 1989-01-18 | 1991-05-28 | Mitsubishi Denki Kabushiki Kaisha | Engine starter with a pinion shifter unit |
| EP0494681A1 (en) * | 1991-01-11 | 1992-07-15 | Mitsubishi Denki Kabushiki Kaisha | Starter device |
| EP0562475A1 (en) * | 1992-03-19 | 1993-09-29 | Mitsubishi Denki Kabushiki Kaisha | Starting motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837651A (en) * | 2017-02-28 | 2017-06-13 | 上海法雷奥汽车电器系统有限公司 | The little gear detent mechanism and starter of a kind of starter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1111004A (en) | 1995-11-01 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140428 Granted publication date: 20000322 |