CN107023585A - Spline connection structure and the engine starting motor including it - Google Patents
Spline connection structure and the engine starting motor including it Download PDFInfo
- Publication number
- CN107023585A CN107023585A CN201610071704.7A CN201610071704A CN107023585A CN 107023585 A CN107023585 A CN 107023585A CN 201610071704 A CN201610071704 A CN 201610071704A CN 107023585 A CN107023585 A CN 107023585A
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- China
- Prior art keywords
- spline
- connection structure
- key teeth
- circumferential surface
- key
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- Granted
Links
- 230000003993 interaction Effects 0.000 claims abstract description 4
- 210000000515 tooth Anatomy 0.000 claims description 122
- 206010055001 Hypodontia Diseases 0.000 claims description 10
- 206010002583 anodontia Diseases 0.000 claims description 10
- 230000005213 hypodontia Effects 0.000 claims description 10
- 201000006680 tooth agenesis Diseases 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
- F16D1/04—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hub; with hub and longitudinal key
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- General Details Of Gearings (AREA)
Abstract
The present invention relates to spline connection structure and the engine starting motor including it.The spline connection structure includes：The first spline on the first circumferential surface, first spline includes the first key teeth and gear tooth, first key teeth is evenly distributed on the first circumferential surface and the first keyway is formed between the first adjacent key teeth, keeps off tooth position in the end of the first key teeth and is aligned or at least first keyway；And the second spline on the second circumferential surface and suitable for being engaged with the first spline, there is the second key teeth and the toothless portion) passed through in assembling suitable for gear tooth on second spline, it is suitable to be more than 1 with the accounting of the work tooth of the second spline interaction when the first spline and the second spline are engaged and corresponding second key teeth inserting is at least one described first keyway in the second spline, in the first spline：2.The present invention has the advantages that operating efficiency and reliability are higher.
Description
Technical field
The present invention relates to mechanical connecting structure technical field；Specifically, the present invention relates to a kind of spline connection structure.Further, the invention further relates to include the engine starting motor of this spline connection structure.
Background technology
Generally, spline connection structure is made up of internal spline and external splines, is usually used in the connection between axis hole.Inside and outside spline is multiple tooth part, and the spline on the inner periphery in hole is internal spline, and the spline on the outer cylinder surface of axle is external splines.
According to different classification, spline can include rectangular spline, serration and involute spline etc.；Or including straight spline and helical spline etc..
Fig. 1 shows a kind of sectional view and plane outspread drawing of the helical spline of prior art.In figure 3, internal spline 1 possesses 7 key teeths 3, and external splines 2 possesses 14 key teeths 4 and 7 gear teeth 5 positioned at the key teeth end.In the course of the work, due to key teeth limited amount, the stress born in each key teeth is larger, it is easy to damages key teeth and causes spline to fail for interior external splines.As shown in Figures 2 and 3, it is shown that the internal spline of the conventional helical spline in the isolator of car engine start motor and the position easy to wear 6,7 of external splines.In addition, the only unilateral internal spline key teeth of external splines key teeth is played a role when transmitting torque, therefore the utilization rate of key teeth is not high.
The content of the invention
It can overcome the spline connection structure of aforementioned drawback of the prior art it is an object of the invention to provide a kind of.
Further, the present invention also aims to provide a kind of to include the engine starting motor of this spline connection structure.
In order to realize aforementioned techniques purpose, the first aspect of the present invention provides a kind of spline connection structure for shaft hole matching, wherein, the spline connection structure includes：
The first spline on the first circumferential surface, first spline includes the first key teeth and gear tooth, first key teeth is evenly distributed on first circumferential surface and the first keyway is formed between adjacent first key teeth, the gear tooth position in first key teeth end and be aligned or at least first keyway；And
There is the second key teeth and the toothless portion) passed through in assembling suitable for the gear tooth on the second spline on the second circumferential surface and suitable for being engaged with first spline, second spline,
Wherein, it is suitable to be more than 1 with the accounting of the work tooth of second spline interaction when first spline and second spline are engaged and corresponding second key teeth inserting is at least one described first keyway in second spline, in first spline：2.
Alternatively, in foregoing spline connection structure, first spline is active spline and second spline is driven spline, or, first spline is driven spline and second spline is active spline.
Alternatively, in foregoing spline connection structure, first circumferential surface be the inner circumferential surface in hole and second circumferential surface be axle external peripheral surface, or, first circumferential surface be the outer circumference surface of axle and second circumferential surface be hole inner circumferential surface.
Alternatively, in foregoing spline connection structure, the spline connection structure is helical spline attachment structure.
Alternatively, in foregoing spline connection structure, the gear tooth is evenly distributed on first circumferential surface, and each gear tooth is distributed to different M the first key teeths and at most N number of the first adjacent keyway therein that aligns, wherein M is more than 2, N and is less than M；And
The toothless portion) is identical with the quantity of the gear teeth portion, second key teeth is defined by the toothless portion) and is grouped, second key teeth described in every group is suitable in first keyway that is respectively fitting between the different M the first key teeths, and the tooth pitch of the toothless portion) is at least N plus 1 times of the tooth pitch of first spline.
Alternatively, in foregoing spline connection structure, the second key teeth described in every group subtracts N number of second key teeth including at most M.
Alternatively, in foregoing spline connection structure, N is equal to 1, and the second key teeth described in every group includes tooth pitch of the tooth pitch equal to first key teeth of second key teeth in M subtract 1 the second key teeths, and every group.
Alternatively, in foregoing spline connection structure, there is hypodontia in the gear tooth being evenly distributed on first circumferential surface, and/or, described in every group there is hypodontia in the second key teeth.
In order to realize aforementioned techniques purpose, the second aspect of the present invention provides a kind of engine starting motor, and the starting motor includes the spline connection structure as any one of aforementioned first aspect.
Alternatively, described to start the pinion shaft that motor includes isolator and driven by the isolator in motor is started as previously described, the pinion shaft drives engine flywheel by little gear, and
First spline of the spline connection structure is located on the isolator and second spline is located on the pinion shaft, or, second spline of the spline connection structure is located on the isolator and first spline is located on the pinion shaft.
Brief description of the drawings
Referring to the drawings, the disclosure will be apparent.It is to be appreciated that these accompanying drawings are intended solely for illustrative purposes, and it is not intended to and protection scope of the present invention is construed as limiting.In figure：
Fig. 1 shows a kind of sectional view and plane outspread drawing of the helical spline of prior art；
Fig. 2 and Fig. 3 show the internal spline and the abrasion condition of external splines of the conventional helical spline in the isolator of car engine start motor；And
Fig. 4 shows the sectional view and plane outspread drawing of the helical spline according to one embodiment of the present invention.
Embodiment
Describe the embodiment of the present invention in detail with reference to the accompanying drawings.In the drawings, identical reference represents identical or corresponding technical characteristic.
Fig. 4 shows the sectional view and plane outspread drawing of the spline connection structure according to one embodiment of the present invention.This spline connection structure is used for shaft hole matching；Specifically, it is in the example presented in the figure shaft hole matching for the pinion shaft of engine starting motor and the endoporus of isolator.It will be seen that, only it is used as herein with the pinion shaft of engine starting motor with isolator and is illustrated；The spline connection structure of the present invention is equally applicable to the axis hole connection of other occasions.
Such as Fig. 4（1）Shown in be spline connection structure sectional view.As illustrated, spline connection structure is applied to the engagement of the first circumferential surface 10 and the second circumferential surface 20, one of first circumferential surface and second circumferential surface are the external peripheral surface of axle, another inner circumferential surface for hole.
It can be seen that in the specific example of diagram, the first circumferential surface 10 be the outer circumference surface of axle and the second circumferential surface 20 be hole inner circumferential surface.More specifically, this axle can be the pinion shaft of engine starting motor, and this hole can be the endoporus of the isolator of engine starting motor.In engine starting motor, the rotor of engine starting motor is splined structure driving pinion axle by isolator, and pinion shaft provides power to the flywheel of automobile engine by little gear, realizes that engine is started.It can be seen that, in this embodiment, the spline on the endoporus of isolator（That is the second spline）For active spline, and the spline on pinion shaft（That is the first spline）For driven spline.
By teachings of the present invention, person of ordinary skill in the field will be seen that, in other application occasion, it is also contemplated that the first spline is set into driven spline and the second spline is set to active spline；Or, the first circumferential surface can also be set to the inner circumferential surface in hole and the second circumferential surface is set to the external peripheral surface of axle.
Fig. 4（2）With（3）In show the expanded view of spline connection structure.It can be seen that spline connection structure therein is helical spline attachment structure.It will be seen that, straight spline connection structure etc. is equally applicable to according to the spline connection structure of the present invention.
It can be seen more clearly from figure, the spline connection structure includes the first spline being located on the first circumferential surface 10, the first spline includes the first key teeth 11 and gear tooth 12.First key teeth is evenly distributed on the first circumferential surface and the first keyway 13 is formed between the first adjacent key teeth.Gear tooth 12 is located at the end of the first key teeth and is aligned or at least first keyway.In figure, gear tooth 12 is also evenly distributed on the first circumferential surface；But, in alternative embodiments, in gear tooth 12 can also hypodontia, for example, being only formed with gear tooth at the one, two or three position put of diagram gear tooth position.As long as gear tooth has enough intensity, as far as possible few gear tooth can be used to reduce manufacture difficulty and manufacturing cost.
The spline connection structure, which also includes being located at, can have the second key teeth 21 and the toothless portion) 22 passed through in assembling suitable for gear tooth on the second spline on the second circumferential surface 20 and suitable for being engaged with the first spline, the second spline.The second spline is suitable to engage with the first spline herein, it is contemplated that the design structure of their key teeth, keyway etc. can be that consistent or person of ordinary skill in the field can be adjusted according to the knowledge of this area so that the two to be matched in shape, size.
In examples shown, by pinion shaft（At first spline of diagram）When being attached in the hole of isolator, the gear tooth for the first spline that first toothless portion) of the second spline can align is fully-inserted by the second spline of pinion shaft along the first keyway；After such insertion, pinion shaft is rotated to an angle, and the second key teeth of the second spline is returned in the keyway between the first key teeth, now at least one second key teeth alignment gear tooth can be so blocked without departing from isolator when the second spline slides in and out by gear tooth.
Fig. 4（2）With（3）Respectively illustrate a kind of different operating position of embodiment according to helical spline attachment means of the invention.
In Fig. 4（2）In, helical spline attachment means stop position in starting motor.Now, start motor and do not carry out starting to work for engine, the second spline engages with the first spline and is maintained at the right side of the first spline.On the right side of the second spline, because the stop device such as the collar (not shown) on pinion shaft can prevent it from skidding off to the right.After motor start-up operation is started, the second spline will circumferentially drive the first spline.Due to the oblique arrangement of helical spline simultaneously so that both the first spline and the second spline can also produce relative shift vertically, kept off until the key teeth of the second spline is resisted against on tooth, such as Fig. 4（3）Shown in.In this state, the little gear on pinion shaft will engage the flywheel of engine, engine of start-uping a car.After the engine is started up, it drives the rotating speed that the rotating speed of pinion shaft makes it gradually exceed isolator, so that pinion shaft returns gradually to Fig. 4 vertically（2）In position, final little gear and engine flywheel depart from, terminate engine and start to work.
As shown in Figure 4, in this embodiment, it is suitable to be more than 1 with the accounting of the work tooth of the second spline interaction when the first spline and the second spline are engaged and corresponding second key teeth inserting is at least one described first keyway in the second spline, in the first spline：2.Specifically, in this example, the first spline includes 16 the first key teeths 11, and the second spline includes 12 the second key teeths 21.12 and the second key teeth phase separation in 16 the first key teeths only on the second key teeth one side, it is seen then that the accounting of the work tooth in the first spline suitable for being interacted with the second spline is 3：4, more than 1：2.Now, compared with prior art, the operating efficiency and reliability of spline connection structure of the invention are improved.
Based on the example in figure, person of ordinary skill in the field is contemplated that more variants.For example, each gear tooth can be distributed to different M the first key teeths and at most N number of the first adjacent keyway therein that aligns, it is integer that wherein M, which is more than 2, N and is less than M, M and N,.Toothless portion) can be identical with keeping off the quantity of teeth portion or be suitable for gear tooth in assembling by toothless portion) more than the quantity for keeping off teeth portion.Such as Fig. 4（2）With（3）Shown in, the second key teeth can be defined and is grouped by toothless portion), and now every group of second key teeth is suitable in the first keyway for being respectively fitting between different M the first key teeths.In order to ensure that gear tooth can pass through from toothless portion), the tooth pitch of toothless portion) can be at least N plus 1 times of the tooth pitch of the first spline.Every group of second key teeth then can subtract N number of second key teeth including at most M.Need it is further noted that, in order to realize more preferable operating efficiency and reliability, on the basis of M and N foregoing value, while to ensure in the first spline with the second spline act on work tooth accounting be more than 1：2.
For example, when M is that the technical scheme in Fig. 4 is can obtain when 4, N is 1.Now, each gear tooth can be distributed to 4 different the first key teeths and 1 the first keyway therein that aligns；Toothless portion) is identical with the quantity for keeping off teeth portion, is 4；Second key teeth can then be defined and is grouped by toothless portion), and now every group of second key teeth is suitable to be respectively fitting into the first keyway between 4 different the first key teeths；In order to ensure that gear tooth can pass through from toothless portion), the tooth pitch of toothless portion) is 2 times of the tooth pitch of the first spline；Every group of second key teeth includes 3 the second key teeths.Now, the accounting of the work tooth acted in the first spline with the second spline is 3：4, more than 1：2.
For another example when M is that 5, N can obtain another technical scheme when being 2.Now, each gear tooth can be distributed to 5 different the first key teeths and 2 therein the first adjacent keyways that align；Toothless portion) can be identical with keeping off the quantity of teeth portion；Second key teeth can then be defined and is grouped by toothless portion), and now every group of second key teeth is suitable to be respectively fitting into the first keyway between 5 different the first key teeths；In order to ensure that gear tooth can pass through from toothless portion), the tooth pitch of toothless portion) is 3 times of the tooth pitch of the first spline；Every group of second key teeth includes 3 the second key teeths.Now, the accounting of the work tooth acted in the first spline with the second spline is 3：5, more than 1：2.
For another example when M is that 3, N can obtain yet another technique scheme when being 1.Now, each gear tooth can be distributed to 3 different the first key teeths and 2 the first keyways therein that align；Toothless portion) is identical with the quantity for keeping off teeth portion；Second key teeth can then be defined and is grouped by toothless portion), and now every group of second key teeth is suitable to be respectively fitting into the first keyway between 3 different the first key teeths；In order to ensure that gear tooth can pass through from toothless portion), the tooth pitch of toothless portion) is 2 times of the tooth pitch of the first spline；Every group of second key teeth includes 2 the second key teeths.Now, the accounting of the work tooth acted in the first spline with the second spline is 2：3, more than 1：2.
From the above, it can be seen that in alternative embodiments, N can also be equal to 1, every group of second key teeth include tooth pitch between the second key teeth in M subtract 1 the second key teeths, and every group can equal to the first key teeth tooth pitch.It will be seen that, M and N can use other appropriate integer values, no longer illustrate one by one herein.
In addition, in alternative embodiments, the gear tooth being evenly distributed on the first circumferential surface may have hypodontia, every group of second key teeth can also have hypodontia.In the case where gear tooth has hypodontia, as long as the intensity of the hypodontia retained is enough, you can to realize the situation for preventing that the second spline from departing from from the first spline.It is further envisioned that in the case where the second key teeth has hypodontia, as long as ensureing that the work gear ratio of the first key teeth of spline connection structure is more than 1：2, then technique effect more reliable compared with prior art still can be obtained, meets the requirement of the present invention.
By above description, person of ordinary skill in the field will be seen that, be may apply to according to the spline connection structure of the present invention in engine starting motor.This to start the pinion shaft that motor include isolator and be driven by isolator in a kind of example, pinion shaft can drive engine flywheel by little gear thereon, and isolator and pinion shaft are then engaged by the spline connection structure of the present invention.In alternative embodiments, the first spline of spline connection structure is located on isolator and the second spline is located on pinion shaft, or, the second spline of spline connection structure is located on isolator and the first spline is located on pinion shaft.
The technical scope of the present invention is not limited solely to the content in described above, those skilled in the art can be on the premise of the technology of the present invention thought not be departed from, many variations and modifications are carried out to above-mentioned embodiment, and these deformations and modification all should work as and be within the scope of the present invention.
Claims (10)
1. a kind of spline connection structure for shaft hole matching, it is characterised in that the spline connection structure includes：
The first spline on the first circumferential surface, first spline includes the first key teeth and gear tooth, first key teeth is evenly distributed on first circumferential surface and the first keyway is formed between adjacent first key teeth, the gear tooth position in first key teeth end and be aligned or at least first keyway；And
There is the second key teeth and the toothless portion) passed through in assembling suitable for the gear tooth on the second spline on the second circumferential surface and suitable for being engaged with first spline, second spline,
Wherein, it is suitable to be more than 1 with the accounting of the work tooth of second spline interaction when first spline and second spline are engaged and corresponding second key teeth inserting is at least one described first keyway in second spline, in first spline：2.
2. spline connection structure as claimed in claim 1, wherein, first spline is active spline and second spline is driven spline, or, first spline is driven spline and second spline is active spline.
3. spline connection structure as claimed in claim 1, wherein, first circumferential surface be the inner circumferential surface in hole and second circumferential surface be axle external peripheral surface, or, first circumferential surface be the outer circumference surface of axle and second circumferential surface be hole inner circumferential surface.
4. spline connection structure as claimed in claim 1, wherein, the spline connection structure is helical spline attachment structure.
5. the spline connection structure as any one of Claims 1-4, wherein,
The gear tooth is evenly distributed on first circumferential surface, and each gear tooth is distributed to different M the first key teeths and at most N number of the first adjacent keyway therein that aligns, and wherein M is more than 2, N and is less than M；And
The toothless portion) is identical with the quantity of the gear teeth portion, second key teeth is defined by the toothless portion) and is grouped, second key teeth described in every group is suitable in first keyway that is respectively fitting between the different M the first key teeths, and the tooth pitch of the toothless portion) is at least N plus 1 times of the tooth pitch of first spline.
6. spline connection structure as claimed in claim 5, wherein, the second key teeth described in every group subtracts N number of second key teeth including at most M.
7. spline connection structure as claimed in claim 6, wherein, N is equal to 1, and the second key teeth described in every group includes tooth pitch of the tooth pitch equal to first key teeth of second key teeth in M subtract 1 the second key teeths, and every group.
8. spline connection structure as claimed in claim 5, wherein, there is hypodontia in the gear tooth being evenly distributed on first circumferential surface, and/or, described in every group there is hypodontia in the second key teeth.
9. a kind of engine starting motor, it is characterised in that the starting motor includes the spline connection structure as any one of preceding claims 1 to 8.
10. motor is started as claimed in claim 9, wherein, described to start the pinion shaft that motor includes isolator and driven by the isolator, the pinion shaft drives engine flywheel by little gear, and
First spline of the spline connection structure is located on the isolator and second spline is located on the pinion shaft, or, second spline of the spline connection structure is located on the isolator and first spline is located on the pinion shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071704.7A CN107023585B (en) | 2016-02-02 | 2016-02-02 | Spline connection structure reaches engine starting motor including it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071704.7A CN107023585B (en) | 2016-02-02 | 2016-02-02 | Spline connection structure reaches engine starting motor including it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107023585A true CN107023585A (en) | 2017-08-08 |
| CN107023585B CN107023585B (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610071704.7A Active CN107023585B (en) | 2016-02-02 | 2016-02-02 | Spline connection structure reaches engine starting motor including it |
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| CN201110241Y (en) * | 2007-11-13 | 2008-09-03 | 比亚迪股份有限公司 | Transmission mechanism of starter |
| EP1253336B1 (en) * | 2001-04-26 | 2010-08-18 | General Electric Company | Spline connection for limited access space and method of assembly and disassembly |
| CN102116350A (en) * | 2010-12-29 | 2011-07-06 | 东莞市新泽谷机械有限公司 | Improved spline pair |
| CN102985635A (en) * | 2010-06-30 | 2013-03-20 | 阿特拉斯·科普柯凿岩设备有限公司 | Driver for torque and rotation transfer from a rotational chuck to a drill steel |
| CN103486142A (en) * | 2013-09-25 | 2014-01-01 | 浙江通力重型齿轮股份有限公司 | Transmission structure for transmission shafts |
| US20150192177A1 (en) * | 2014-01-07 | 2015-07-09 | Hamilton Sundstrand Corporation | Spline Lock Shaft Locking System |
| CN205780381U (en) * | 2016-02-02 | 2016-12-07 | 罗伯特·博世有限公司 | Spline connection structure and include its engine starting motor |
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2016
- 2016-02-02 CN CN201610071704.7A patent/CN107023585B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1253336B1 (en) * | 2001-04-26 | 2010-08-18 | General Electric Company | Spline connection for limited access space and method of assembly and disassembly |
| CN201110241Y (en) * | 2007-11-13 | 2008-09-03 | 比亚迪股份有限公司 | Transmission mechanism of starter |
| CN102985635A (en) * | 2010-06-30 | 2013-03-20 | 阿特拉斯·科普柯凿岩设备有限公司 | Driver for torque and rotation transfer from a rotational chuck to a drill steel |
| CN102116350A (en) * | 2010-12-29 | 2011-07-06 | 东莞市新泽谷机械有限公司 | Improved spline pair |
| CN103486142A (en) * | 2013-09-25 | 2014-01-01 | 浙江通力重型齿轮股份有限公司 | Transmission structure for transmission shafts |
| US20150192177A1 (en) * | 2014-01-07 | 2015-07-09 | Hamilton Sundstrand Corporation | Spline Lock Shaft Locking System |
| CN205780381U (en) * | 2016-02-02 | 2016-12-07 | 罗伯特·博世有限公司 | Spline connection structure and include its engine starting motor |
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| Publication number | Publication date |
|---|---|
| CN107023585B (en) | 2020-11-03 |
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