CN205780381U - Spline connection structure and include its engine starting motor - Google Patents

Spline connection structure and include its engine starting motor Download PDF

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Publication number
CN205780381U
CN205780381U CN201620103218.4U CN201620103218U CN205780381U CN 205780381 U CN205780381 U CN 205780381U CN 201620103218 U CN201620103218 U CN 201620103218U CN 205780381 U CN205780381 U CN 205780381U
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China
Prior art keywords
spline
tooth
connection structure
key
circumferential surface
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Withdrawn - After Issue
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CN201620103218.4U
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Chinese (zh)
Inventor
李剑
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.)
Thorne (china) Lattice Auto Parts Co Ltd
Original Assignee
Thornger Automotive Parts Germany GmbH
Robert Bosch GmbH
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Priority to CN201620103218.4U priority Critical patent/CN205780381U/en
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Abstract

This utility model relates to spline connection structure and includes its engine starting motor.Described spline connection structure includes: the first spline being positioned on the first circumferential surface, first spline includes the first key tooth and gear tooth, first key tooth is evenly distributed and is formed between the first adjacent key tooth the first keyway on the first circumferential surface, and gear tooth is positioned at the end of the first key tooth and is aligned or at least described first keyway;And be positioned on the second circumferential surface and be suitable to the second spline engaged with the first spline, there is on second spline the second key tooth and be suitable to keep off the toothless portion) that tooth passes when assembling, when the first spline and the second spline engage and in the second spline, corresponding second key tooth inserting is at least one first keyway described, the first spline is suitable to be more than 1:2 with the accounting of the work tooth of the second spline interaction.This utility model has work efficiency and the higher advantage of reliability.

Description

Spline connection structure and include its engine starting motor
Technical field
This utility model relates to mechanical connecting structure technical field;Specifically, this utility model relates to a kind of spline connection structure.Further, this utility model 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, the connection being usually used 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 illustrates the sectional view of the helical spline of a kind of prior art.Fig. 2 and Fig. 3 illustrates the plane outspread drawing of helical spline in Fig. 1.In figs 2 and 3, internal spline 1 possesses 7 key teeth 3, and external splines 2 possesses 14 key teeth 4 and is positioned at 7 gear teeth 5 of this key tooth end.In the course of the work, due to key tooth limited amount, the stress that each key tooth bears is bigger for interior external splines, it is easy to damages key tooth and causes spline to lose efficacy.As shown in Figure 4 and Figure 5, 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.It addition, the internal spline key tooth that only external splines key tooth is unilateral when transmitting moment plays a role, therefore the utilization rate of key tooth is the highest.
Utility model content
The purpose of this utility model is to provide a kind of spline connection structure that can overcome aforementioned drawback of the prior art.
Further, the purpose of this utility model also resides in a kind of engine starting motor including this spline connection structure of offer.
In order to realize aforementioned techniques purpose, first aspect of the present utility model provides a kind of spline connection structure for shaft hole matching, and wherein, described spline connection structure includes:
The first spline being positioned on the first circumferential surface, described first spline includes the first key tooth and gear tooth, described first key tooth is evenly distributed on described first circumferential surface and forms the first keyway between adjacent described first key tooth, and described gear tooth is positioned at the end of described first key tooth and is aligned or at least described first keyway;And
It is positioned on the second circumferential surface and is suitable to the second spline engaged with described first spline, described second spline have the second key tooth and is suitable to, when assembling, the toothless portion) that described gear tooth passes,
Wherein, when described first spline engages with described second spline and in described second spline, corresponding second key tooth inserting is at least one first keyway described, the accounting of work tooth being suitable in described first spline interact with described second spline is more than 1:2.
Alternatively, in foregoing spline connection structure, for active spline, described second spline is driven spline to described first spline, or, described first spline is driven spline and described second spline is actively spline.
Alternatively, in foregoing spline connection structure, described first circumferential surface is the inner circumferential surface in hole and described second circumferential surface is the external peripheral surface of axle, or, described first circumferential surface is the outer circumference surface of axle and described second circumferential surface is the inner circumferential surface in hole.
Alternatively, in foregoing spline connection structure, described spline connection structure is helical spline attachment structure.
Alternatively, in foregoing spline connection structure, described gear tooth is evenly distributed on described first circumferential surface, and the distribution of each described gear tooth is to M different the first key teeth and the most N number of the first adjacent keyway therein that aligns, wherein M is more than 2, and N is less than M;And
Described toothless portion) is identical with the quantity of described gear teeth portion, described second key tooth is defined by described toothless portion) and is grouped, often organizing described second key tooth to be suitable to be respectively fitting in described first keyway between described different M the first key tooth, the N of the tooth pitch that the tooth pitch of described toothless portion) is at least described first spline adds 1 times.
Alternatively, in foregoing spline connection structure, often organize described second key tooth and include that at most M subtracts N number of second key tooth.
Alternatively, in foregoing spline connection structure, N is equal to 1, often organizes described second key tooth and includes a M second key tooth that subtracts 1, and the tooth pitch of the every described second key tooth in group is equal to the tooth pitch of described first key tooth.
Alternatively, in foregoing spline connection structure, there is hypodontia in the described gear tooth being evenly distributed on described first circumferential surface, and/or, often organize described second key tooth and there is hypodontia.
In order to realize aforementioned techniques purpose, second aspect of the present utility model provides a kind of engine starting motor, and described starting motor includes the spline connection structure as according to any one of aforementioned first aspect.
Alternatively, starting in motor foregoing, described starting motor includes isolator and the pinion shaft driven by described isolator, and described pinion shaft drives engine flywheel by little gear, and
Described first spline of described spline connection structure is positioned on described isolator that described second spline is positioned on described pinion shaft, or, described second spline of described spline connection structure is positioned on described isolator that described first spline is positioned on described pinion shaft.
Accompanying drawing explanation
Referring to the drawings, disclosure of the present utility model will be apparent.It is to be appreciated that these accompanying drawings are intended solely for illustrative purposes, and it is not intended to protection domain of the present utility model is construed as limiting.In figure:
Fig. 1 illustrates the sectional view of the helical spline of a kind of prior art;
Fig. 2 and Fig. 3 illustrates the plane outspread drawing of helical spline in Fig. 1;
Fig. 4 and Fig. 5 illustrates internal spline and the abrasion condition of external splines of the conventional helical spline in the isolator of car engine start motor;
Fig. 6 shows the sectional view of the helical spline according to a kind of embodiment of the present utility model;And
Fig. 7 and Fig. 8 shows the plane outspread drawing of helical spline in Fig. 6.
Detailed description of the invention
Describe detailed description of the invention of the present utility model with reference to the accompanying drawings in detail.In the drawings, identical reference represents identical or corresponding technical characteristic.
Fig. 6 shows the sectional view of the spline connection structure according to a kind of embodiment of the present utility model;Fig. 7 and Fig. 8 shows the plane outspread drawing of helical spline in Fig. 6.This spline connection structure is used for shaft hole matching;Specifically, it is the shaft hole matching of endoporus of pinion shaft and isolator for engine starting motor in the example presented in the figure.It will be seen that, the most only be used as illustrating with isolator with the pinion shaft of engine starting motor;Spline connection structure of the present utility model is equally applicable to the axis hole of other occasion and connects.
It is the sectional view of spline connection structure as shown in Figure 6.As it can be seen, spline connection structure is applicable to the external peripheral surface that one of the first circumferential surface 10 and joint of the second circumferential surface 20, this first circumferential surface and this second circumferential surface are axle, another is the inner circumferential surface in hole.
It can be seen that in the concrete example of diagram, outer circumference surface that the first circumferential surface 10 is axle and the second circumferential surface 20 is the inner circumferential surface in hole.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 by little gear to the flywheel of automobile engine, it is achieved electromotor starts.Visible, in this embodiment, the spline (the i.e. second spline) on the endoporus of isolator is active spline, and the spline (the i.e. first spline) on pinion shaft is driven spline.
Through teaching of the present utility model, person of ordinary skill in the field it will be seen that, in other application scenario, it is also possible to expects the first spline being set to driven spline and the second spline is set to actively spline;Or, it is also possible to the first circumferential surface is set to the inner circumferential surface in hole and the second circumferential surface is set to the external peripheral surface of axle.
Fig. 7 and Fig. 8 shows 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, be equally applicable to straight spline connection structure etc. according to spline connection structure of the present utility model.
Can be seen more clearly from from figure, this spline connection structure includes the first spline being positioned on the first circumferential surface 10, and the first spline includes the first key tooth 11 and gear tooth 12.First key tooth is evenly distributed on the first circumferential surface and forms the first keyway 13 between the first adjacent key tooth.Gear tooth 12 is positioned at the end of the first key tooth and is aligned or at least first keyway.In the drawings, gear tooth 12 is also evenly distributed on the first circumferential surface;But, in alternative embodiments, gear tooth 12 in can also hypodontia, such as, only diagram gear tooth position one, two or three position be formed with gear tooth.As long as gear tooth has enough intensity, the fewest gear tooth can be used to reduce manufacture difficulty and manufacturing cost.
This spline connection structure also includes the second spline being positioned on the second circumferential surface 20 and being suitable to engage with the first spline, the second spline can have the second key tooth 21 and be suitable to keep off the toothless portion) 22 that tooth passes when assembling.Second spline is suitable to engage with the first spline herein, it is contemplated that the design structure of their key tooth, keyway etc. can be consistent or person of ordinary skill in the field can be adjusted mating the two according to the knowledge of this area in shape, size.
In examples shown, time in the hole that pinion shaft (at the first spline of diagram) installs to isolator, the gear tooth of first spline that can first be alignd by the toothless portion) of the second spline, along the first keyway by fully-inserted for the second spline of pinion shaft;After such insertion, pinion shaft is rotated to an angle, and make the second key tooth of the second spline return in the keyway between the first key tooth, now at least one second key tooth alignment gear tooth, so can be blocked without departing from isolator by gear tooth when the second spline slides in and out.
Fig. 7 and Fig. 8 respectively illustrates the different operating position of a kind of detailed description of the invention according to helical spline attachment means of the present utility model.
In the figure 7, helical spline attachment means be in start motor stop position.Now, starting motor and do not carry out starting to work of electromotor, the second spline and the first spline engage and are maintained at the right side of the first spline.On the right side of the second spline, owing to the stop devices such as the not shown collar that is such as arranged on pinion shaft are possible to prevent it to skid off to the right.After starting motor is started working, the second spline will circumferentially drive the first spline.Oblique arrangement due to helical spline so that both the first spline and the second spline the most also can produce relative shift vertically, until the key tooth of the second spline is resisted against on gear tooth, as shown in Figure 8.In this state, the little gear on pinion shaft is by the flywheel of engagement electromotor, electromotor of start-uping a car.After the engine is started up, it drives the rotating speed of pinion shaft to make it gradually exceed the rotating speed of isolator, so that pinion shaft returns gradually to the position in Fig. 7 vertically, final little gear departs from engine flywheel, terminates electromotor and starts to work.
As shown in figures 6, in this embodiment, when the first spline and the second spline engage and in the second spline, corresponding second key tooth inserting is at least one first keyway described, the first spline is suitable to be more than 1:2 with the accounting of the work tooth of the second spline interaction.Specifically, in this example, the first spline includes 16 the first key teeth 11, and the second spline includes 12 the second key teeth 21.12 on the second key tooth one side and the second key tooth phase separation is only had, it is seen then that being suitable to the accounting with the work tooth of the second spline interaction in the first spline is 3:4, more than 1:2 in 16 the first key teeth.Now, compared with prior art, work efficiency and the reliability of spline connection structure of the present utility model is improved.
Based on the example in figure, person of ordinary skill in the field is it is contemplated that more variants.Such as, each gear tooth can distribute to different M the first key tooth and the most N number of the first adjacent keyway therein that aligns, and wherein M is more than 2, and N is integer less than M, M and N.Toothless portion) can with gear teeth portion quantity identical or more than gear teeth portion quantity be suitable for keep off tooth assembling time through toothless portion).As shown in Figures 7 and 8, the second key tooth can be defined by toothless portion) and be grouped, and the most often organizes the second key tooth and is suitable to be respectively fitting in the first keyway between different M the first key tooth.In order to ensure that gear tooth can be from toothless portion) process, the N of the tooth pitch that the tooth pitch of toothless portion) can be at least the first spline adds 1 times.Often organize the second key tooth and then can include that at most M subtracts N number of second key tooth.Need it is further noted that, in order to realize more preferable work efficiency and reliability, on the basis of the aforementioned value of M and N, to ensure in the first spline with the accounting of the work tooth of the second spline effect more than 1:2 simultaneously.
Such as, when M be 4, the N the technical solution of the utility model that can get in Fig. 6-8 when being 1.Now, each gear tooth can distribute to 4 different the first key teeth and 1 the first keyway therein that aligns;Toothless portion) is identical with the quantity of gear teeth portion, is 4;Second key tooth then can be defined by toothless portion) and be grouped, and the most often organizes the second key tooth and is suitable to be respectively fitting in the first keyway between the first key tooth of different 4;In order to ensure that gear tooth can be from toothless portion) process, the tooth pitch of toothless portion) is 2 times of the tooth pitch of the first spline;Often organize the second key tooth and include 3 the second key teeth.Now, in the first spline with the second spline effect work tooth accounting be 3:4, more than 1:2.
The most such as, when M be 5, N available another kind of technical scheme when being 2.Now, each gear tooth can distribute to 5 different the first key teeth and 2 the first adjacent keyways therein that align;Toothless portion) can be identical with the quantity of gear teeth portion;Second key tooth then can be defined by toothless portion) and be grouped, and the most often organizes the second key tooth and is suitable to be respectively fitting in the first keyway between the first key tooth of different 5;In order to ensure that gear tooth can be from toothless portion) process, the tooth pitch of toothless portion) is 3 times of the tooth pitch of the first spline;Often organize the second key tooth and include 3 the second key teeth.Now, in the first spline with the second spline effect work tooth accounting be 3:5, more than 1:2.
The most such as, when M be 3, N can get yet another technique scheme when being 1.Now, each gear tooth can distribute to 3 different the first key teeth and 2 the first keyways therein that align;Toothless portion) is identical with the quantity of gear teeth portion;Second key tooth then can be defined by toothless portion) and be grouped, and the most often organizes the second key tooth and is suitable to be respectively fitting in the first keyway between the first key tooth of different 3;In order to ensure that gear tooth can be from toothless portion) process, the tooth pitch of toothless portion) is 2 times of the tooth pitch of the first spline;Often organize the second key tooth and include 2 the second key teeth.Now, in the first spline with the second spline effect work tooth accounting be 2:3, more than 1:2.
From the above, it can be seen that in alternative embodiments, N can also often organize the second key tooth include a M second key tooth that subtracts 1 equal to 1, and often tooth pitch between the second key tooth in group can be equal to the tooth pitch of the first key tooth.It will be seen that, M and N can use the integer value that other is suitable, illustrates the most one by one.
It addition, in alternative embodiments, can there is hypodontia in the gear tooth being evenly distributed on the first circumferential surface, often organizes the second key tooth and can also there is hypodontia.In the case of gear tooth exists hypodontia, as long as the intensity of the hypodontia retained is enough, i.e. can realize the situation preventing the second spline from departing from from the first spline.It is further envisioned that in the case of the second key tooth exists hypodontia, as long as ensureing that the work gear ratio of the first key tooth of spline connection structure, more than 1:2, the most still can obtain the most more reliable technique effect, meet requirement of the present utility model.
Through above description, person of ordinary skill in the field it will be seen that, may apply in engine starting motor according to spline connection structure of the present utility model.In a kind of example, this starting motor can include isolator and the pinion shaft driven by isolator, and pinion shaft can drive engine flywheel by little gear thereon, and isolator and pinion shaft are then engaged by spline connection structure of the present utility model.In alternative embodiments, the first spline of spline connection structure is positioned at the second spline on isolator and is positioned on pinion shaft, or, the second spline of spline connection structure is positioned at the first spline on isolator and is positioned on pinion shaft.
Technical scope of the present utility model is not limited solely to the content in described above, those skilled in the art can be on the premise of without departing from this utility model technological thought, above-mentioned embodiment is carried out many variations and modifications, and these deformation and amendment all should be worked as and belonged in scope of the present utility model.

Claims (10)

1. the spline connection structure for shaft hole matching, it is characterised in that described spline connection structure includes:
The first spline being positioned on the first circumferential surface, described first spline includes the first key tooth and gear tooth, described first key tooth is evenly distributed on described first circumferential surface and forms the first keyway between adjacent described first key tooth, and described gear tooth is positioned at the end of described first key tooth and is aligned or at least described first keyway;And
It is positioned on the second circumferential surface and is suitable to the second spline engaged with described first spline, described second spline have the second key tooth and is suitable to, when assembling, the toothless portion) that described gear tooth passes,
Wherein, when described first spline engages with described second spline and in described second spline, corresponding second key tooth inserting is at least one first keyway described, the accounting of work tooth being suitable in described first spline interact with described second spline is more than 1:2.
2. spline connection structure as claimed in claim 1, wherein, for active spline, described second spline is driven spline to described first spline, or, described first spline is driven spline and described second spline is actively spline.
3. spline connection structure as claimed in claim 1, wherein, described first circumferential surface is the inner circumferential surface in hole and described second circumferential surface is the external peripheral surface of axle, or, described first circumferential surface is the outer circumference surface of axle and described second circumferential surface is the inner circumferential surface in hole.
4. spline connection structure as claimed in claim 1, wherein, described spline connection structure is helical spline attachment structure.
5. the spline connection structure as according to any one of Claims 1-4, wherein,
Described gear tooth is evenly distributed on described first circumferential surface, and the distribution of each described gear tooth is to M different the first key teeth and the most N number of the first adjacent keyway therein that aligns, and wherein M is more than 2, and N is less than M;And
Described toothless portion) is identical with the quantity of described gear teeth portion, described second key tooth is defined by described toothless portion) and is grouped, often organizing described second key tooth to be suitable to be respectively fitting in described first keyway between described different M the first key tooth, the N of the tooth pitch that the tooth pitch of described toothless portion) is at least described first spline adds 1 times.
6. spline connection structure as claimed in claim 5, wherein, often organizes described second key tooth and includes that at most M subtracts N number of second key tooth.
7. spline connection structure as claimed in claim 6, wherein, N is equal to 1, often organizes described second key tooth and includes a M second key tooth that subtracts 1, and the tooth pitch of the every described second key tooth in group is equal to the tooth pitch of described first key tooth.
8. spline connection structure as claimed in claim 5, wherein, there is hypodontia in the described gear tooth being evenly distributed on described first circumferential surface, and/or, often organize described second key tooth and there is hypodontia.
9. an engine starting motor, it is characterised in that described starting motor includes the spline connection structure as according to any one of aforementioned claim 1 to 8.
Starting motor the most as claimed in claim 9, wherein, described starting motor includes isolator and the pinion shaft driven by described isolator, and described pinion shaft drives engine flywheel by little gear, and
Described first spline of described spline connection structure is positioned on described isolator that described second spline is positioned on described pinion shaft, or, described second spline of described spline connection structure is positioned on described isolator that described first spline is positioned on described pinion shaft.
CN201620103218.4U 2016-02-02 2016-02-02 Spline connection structure and include its engine starting motor Withdrawn - After Issue CN205780381U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107023585A (en) * 2016-02-02 2017-08-08 罗伯特·博世有限公司 Spline connection structure and the engine starting motor including it
CN108825323A (en) * 2018-06-13 2018-11-16 湖州求精汽车链传动有限公司 A kind of timing system of engine for motorcycle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107023585A (en) * 2016-02-02 2017-08-08 罗伯特·博世有限公司 Spline connection structure and the engine starting motor including it
CN108825323A (en) * 2018-06-13 2018-11-16 湖州求精汽车链传动有限公司 A kind of timing system of engine for motorcycle

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Effective date of registration: 20180425

Address after: 410100 No. 26 Lixiang Road, Changsha economic and Technological Development Zone, Changsha, Hunan

Patentee after: Thorne (China) lattice Auto Parts Co., Ltd.

Address before: Stuttgart, Germany

Co-patentee before: Bosch Automotive Products (Changsha) Co., Ltd.

Patentee before: Robert Bosch Ltd.

AV01 Patent right actively abandoned
AV01 Patent right actively abandoned
AV01 Patent right actively abandoned

Granted publication date: 20161207

Effective date of abandoning: 20201103

AV01 Patent right actively abandoned

Granted publication date: 20161207

Effective date of abandoning: 20201103