CN110360302A - A kind of support construction of transmission shaft - Google Patents
A kind of support construction of transmission shaft Download PDFInfo
- Publication number
- CN110360302A CN110360302A CN201910495823.9A CN201910495823A CN110360302A CN 110360302 A CN110360302 A CN 110360302A CN 201910495823 A CN201910495823 A CN 201910495823A CN 110360302 A CN110360302 A CN 110360302A
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- bearing
- transmission shaft
- outer ring
- support construction
- inner ring
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 85
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 230000004323 axial length Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/0018—Shaft assemblies for gearings
Abstract
The present invention relates to vehicular transmission shaft technical fields, provide a kind of support construction of transmission shaft, including transmission shaft, first bearing and second bearing；The first bearing includes the first outer ring and the first inner ring, and first outer ring is connect with one end of the transmission shaft；The second bearing includes the second outer ring and the second inner ring, and second inner ring is sheathed on the transmission shaft；The transmission shaft drives first outer ring and second inner ring integrally to rotate.Support construction provided by the invention, its first bearing and second bearing are respectively using inner ring and outer ring as stator, so that the speed of two bearing retainers generates difference, avoid matched bearings it is identical because being in working condition due to generate the superposition of same frequency noise sound wave the problem of, the embedded mode of first bearing can allow for the axial length of transmission shaft further to shorten, and keep overall structure more compact, reduce assembly space, in addition, the realization rate of support construction of the invention is simple, cost is relatively low.
Description
Technical field
The present invention relates to technical field of bearings, in particular to a kind of support construction of transmission shaft.
Background technique
With the continuous development of auto industry, requirement of the people to vehicle various aspects of performance is also increasingly stringent, wherein just wrapping
The requirement of riding comfort and reliable in mechanical performance is included, naturally, NVH is important as one for assessing vehicle comfort
Aspect is more and more concerned and payes attention to.Bearing as a very important component part in vehicle structure, its own
Reliability be also largely fixed the reliability of whole system.In addition, components of the bearing as a high-speed rotation,
Its own vibration generated and noise, which are also one, cannot be neglected aspect.
Generally transmission shaft is supported in the housing using pairs of bearing in the prior art, two bearings are socketed in transmission shaft
Both ends, while fixed outer ring, using inner ring as stator, as shown in Figure 1, again or simultaneously using outer ring as stator, therefore, at
Pair identical and pairs of two bearings of working condition of two bearings often parameter is identical, when two bearings are due to certain
When kind defect becomes vibration source, the same frequency noise sound wave superposition that vibration generates can generate bigger noise, to reduce power train
The NVH performance of system.
Summary of the invention
The present invention is to solve the bearing working state used in pairs is identical, cause same frequency noise sound wave be superimposed and
The technical issues of generating bigger noise.
In order to solve the above technical problems, the invention discloses a kind of support construction of transmission shaft, the support construction includes:
Transmission shaft；
First bearing, the first bearing include the first outer ring and the first inner ring, first outer ring and the transmission shaft
One end connection；
Second bearing, the second bearing include the second outer ring and the second inner ring, and second inner ring is sheathed on the biography
Moving axis；
Wherein, the transmission shaft drives first outer ring and second inner ring integrally to rotate.
Further, the first bearing and the second bearing are angular contact bearing.
Further, the first bearing further includes the first retainer, and the second bearing further includes the second retainer, institute
The speed for stating the first retainer is different from the speed of second retainer.
Further, the speed of first retainer isThe rotation of second retainer
Turning frequency isWherein, γ is defined as Dcos α/dm, wherein D is the diameter of bearing roller, and α is bearing
Contact angle, dmFor the pitch diameter of bearing, n is the revolving speed of transmission shaft.
Further, the transmission shaft further includes interconnecting piece, and the connecting portion is in one end of the transmission shaft, the company
Socket part is connected and fixed with first outer ring.
Further, one end of the transmission shaft is socketed with driving member, and the driving member and the transmission shaft are rigidly connected,
The inner wall of the driving member and first outer ring without connecting with the relative rotation.
Further, first inner ring is non-rotatably fixed by the first fixing piece.
Further, second outer ring is non-rotatably fixed by the second fixing piece.
Further, there are gaps between the side and the transmission shaft of the transmission shaft for the first bearing.
Further, the wheel teeth portion for transmission is additionally provided on the transmission shaft.
By adopting the above technical scheme, of the present invention to have the following beneficial effects:
1) drive shaft support structure of the technical program, the first outer ring of first bearing and the transmission axis connection, the
Second inner ring of two bearings and the transmission axis connection, so that transmission shaft is able to drive the first outer ring and the second inner ring rotates together
Movement avoids the frequency of matched bearings noise sound wave so that the retainer revolving speed of first bearing and second bearing generates difference
The superposition of noise sound wave caused by rate is identical, to reduce noise under drive shaft support structure working condition, improves transmission system
NVH performance；
2) bearing in the technical program in matched bearings is installed in a manner of being embedded in, and allows for passing to a certain extent
The axial length of moving axis further shortens, so that integrally-built installation space is reduced, so that the structure of entire transmission shaft is more
Step up to gather, helps to realize the more lightweight and miniaturization of auto parts and components；
3) realization rate of the technical program is simple, and using the method for active noise reduction, cost is relatively low.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the schematic diagram of the drive shaft support structure of the prior art；
Fig. 2 is the schematic diagram of the drive shaft support structure of one embodiment of the invention；
Fig. 3 is the bearing working schematic illustration of the drive shaft support structure of one embodiment of the invention；
Fig. 4 is the schematic diagram of the drive shaft support structure of another embodiment of the present invention；
It remarks additionally below to attached drawing:
1- transmission shaft；2- first bearing；The first outer ring 201-；The first inner ring of 202-；3- second bearing；Outside 301- second
Circle；The second outer ring 302-；4- interconnecting piece；5- driving member；The 6- gear teeth.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
" one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one implementation of the invention
A particular feature, structure, or characteristic.In the description of the present invention, it is to be understood that, term " on ", "lower", "top", "bottom" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can be expressed or what is implied includes one or more of the features.Moreover, term " first ",
" second " etc. is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that in this way
The data used are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein can be in addition to scheming herein
Sequence other than those of showing or describe is implemented.
Embodiment 1:
It is identical to solve the bearing working state used in pairs in the prior art, cause sound wave to be superimposed and generate bigger
The technical issues of noise.Fig. 2 shows the schematic diagrames for the drive shaft support structure that one embodiment of the invention provides.As shown in Fig. 2,
A kind of support construction of transmission shaft provided in this embodiment, comprising:
Transmission shaft 1；
First bearing 2, first bearing 2 include the first outer ring 201 and the first inner ring 202, the first outer ring 201 and transmission shaft 1
One end connection；
Second bearing 3, second bearing 3 include the second outer ring 301 and the second inner ring 302, and the second inner ring 302 is sheathed on transmission
Axis 1；
Wherein, transmission shaft 1 drives the first outer ring 201 and the second inner ring 302 integrally to rotate while rotating, outside first
Circle 201 and the second inner ring 302 and transmission shaft 1 are without relative rotation or sliding.
In the embodiment, the first outer ring of the first bearing of drive shaft support structure and the transmission axis connection, the second axis
The second inner ring held and the transmission axis connection, so that transmission shaft is able to drive the first outer ring and the second inner ring rotates fortune together
It is dynamic, so that the retainer revolving speed of first bearing and second bearing generates difference, avoid the frequency of matched bearings noise sound wave
The superposition of noise sound wave caused by identical, to reduce noise under drive shaft support structure working condition, improves transmission system
NVH performance.
In some embodiments, transmission shaft 1 further includes interconnecting piece 4, and interconnecting piece 4 is located at one end of transmission shaft 1, interconnecting piece 4
It is connected and fixed with the first outer ring 201.
It should be noted that interconnecting piece 4 can be it is as shown in the figure with the integrally formed embedded groove structure of transmission shaft 1,
First bearing 2 is installed on to one end of transmission shaft 1 groove in a manner of embedded, so that the first outer ring 201 connects with transmission shaft 1
It connects fixed and can integrally rotate, in order to guarantee that transmission shaft 1 can rotate freely, first bearing 2 is embedded in the one of transmission shaft 1
There are gaps between side and transmission shaft 1, generate frictional force to prevent the embedded surface of first bearing 2 from contacting with transmission shaft 1；In addition,
Interconnecting piece 4 is also possible to other connection structures or connector, as long as it can be coaxial with transmission shaft 1 by the first outer ring 201
Ground is connected and fixed, and guarantees that transmission shaft 1 can drive the first outer ring 201 and the under the bearing of first bearing 2 and second bearing 3
Two inner rings 302 rotate freely.
In some embodiments, first bearing 2 and second bearing 3 are angular contact bearing.
In some embodiments, first bearing 2 further includes the first retainer, and second bearing 3 further includes the second retainer, the
The speed of one retainer is not identical as the speed of the second retainer.
In some embodiments, the speed of the first retainer isThe rotation of second retainer
Frequency isIn order to facilitate expression, γ is a customized value, and the definition of γ is Dcos α and dmRatio
Value, i.e. γ=Dcos α/dm, wherein D is the diameter of bearing roller, and α is the contact angle of bearing, dmFor the pitch diameter of bearing,
N is the revolving speed of transmission shaft.
The working principle of support construction of the invention is specifically addressed below in conjunction with the working condition of bearing, is such as schemed
Shown in 3:
Under normal circumstances, when a bearing is in running order, according to the calculation formula for being pivoted linear velocity:
υ=ω r (1)
ω is calculated in formula with rad/s.
The then linear velocity v of bearing inner race racewayiAre as follows:
Wherein, ωiFor the angular speed of bearing inner race raceway, dmFor the pitch diameter of bearing, D is the diameter of bearing roller,
α is the contact angle of bearing, and the definition of γ is Dcos α and dmRatio, i.e. γ=Dcos α/dm；
Similarly, the linear velocity v of bearing outer ring ball trackoAre as follows:
According to the calculation formula of angular speed:
N is as unit of r/min in formula, therefore
Wherein niFor the revolving speed of bearing inner race raceway, noFor the revolving speed of bearing outer ring ball track.
If do not slided seriously in raceway contact point, the linear velocity v of bearing retainermIt is its inner ring raceway linear velocity
viWith outer ring raceway linear velocity voAverage value, then
Formula (5) and (6) is brought into formula (7) to obtain:
And due to
Wherein, ωmFor the angular speed of bearing retainer, nmFor the revolving speed of bearing retainer.
Therefore, the revolving speed of bearing retainer are as follows:
In the prior art, when the outer ring of two bearings used in pairs is simultaneously as stator, then the outer ring rolling of two bearings
Road revolving speed noIt is 0, the inner ring raceway revolving speed n of two bearingsiIt is equal to rotating speed of transmission shaft n, then, the retainer of two bearings
Revolving speed is represented asAgain since each parameter of two bearings used in pairs is all identical namely two axis
The γ value held is identical, and therefore, the revolving speed of two bearing retainers is identical, then the speed of two bearing retainers is also identical,
It isSimilarly, it is assumed that the inner rings of two bearings used in pairs is simultaneously as stator, then the inner ring of two bearings
Raceway revolving speed niIt is 0, the outer ring raceway revolving speed n of two bearingsoIt is equal to rotating speed of transmission shaft n, then, the holding of two bearings
Frame revolving speed is represented asAgain since each parameter of two bearings used in pairs is all identical namely two
The γ value of bearing is identical, and therefore, the revolving speed of two bearing retainers is identical, then the speed of two bearing retainers also phase
Together, it is
As described above, the speed of two bearings is consistent when using the matched bearings mount scheme of the prior art, because
This, when bearing becomes vibration source due to certain defect, the same frequency noise sound wave superposition that two bear vibration generate can be generated more
Big noise.
In technical solution of the present invention, the first inner ring 202 is used as stator, and transmission shaft 1 drives the first outer ring 201 integrally to revolve
Turn, then the inner ring raceway revolving speed n of first bearing 2i1It is 0, the outer ring raceway revolving speed n of first bearing 2o1Equal to the revolving speed of transmission shaft 1
N, according to formula (10), the retainer revolving speed of first bearing 2 isSo speed of first bearing 2
For
Similarly, the second outer ring 301 is used as stator, and transmission shaft 1 drives the second inner ring 302 integrally to rotate, then second bearing 3
Outer ring raceway revolving speed no2It is 0, the inner ring raceway revolving speed n of second bearing 3i2Equal to the revolving speed n of transmission shaft 1, according to formula (10),
The retainer revolving speed of second bearing 3 is The speed of so second bearing 3 is
Again because of γ1And γ2It is not 0, even if when the γ value of first bearing 2 and second bearing 3 is identical, 2 He of first bearing
The speed of second bearing 3 is not also identical, therefore, when first bearing 2 and second bearing 3 since certain defect becomes vibration source
When, first bearing 2 and the vibration noise frequency that second bearing 3 generates be not also identical, makes an uproar frequently so as to avoid same in the prior art
The possibility of several wave superpositions.
Compared with the existing technology, the bearing used in pairs in support construction provided in this embodiment uses different installation sides
Formula, first bearing 2 is using the first inner ring 202 as stator, and second bearing 3 is using the second outer ring 301 as stator, in this way, two axis
The working condition held is not identical, and the speed of retainer is also different, to make the vibration of first bearing 2 and second bearing 3
Moving noise frequency of sound wave generates difference, avoids the superposition of same frequency noise sound wave and generates bigger noise, improves power train
The NVH performance of system, in addition, the method that the technical program uses active noise reduction, realization rate is relatively simple, and cost is relatively low.
Embodiment 2:
If Fig. 3 shows the another embodiment of technical solution of the present invention, the present embodiment is that support construction of the invention exists
Application in automotive transmission.
One end of transmission shaft 1 is socketed with driving member 5, and driving member 5 and transmission shaft 1 are rigidly connected, the inner wall of driving member 5 and the
The outer ring of one bearing 2 without connecting with the relative rotation.
In the present embodiment, transmission shaft 1 is the output shaft of speed changer, and driving member 5 is the output gear for being welded on output shaft one end
Wheel, first bearing 2 is mounted in gear in a manner of insertion, and the inner wall of gear and the outer ring of first bearing 2 are interference fitted, and defeated
The input gear of gear engagement drives output gear rotation out, and output shaft and output gear integrally rotate and drive first bearing
2 outer ring integrally rotates.
Further, the inner ring of first bearing 2 is connected and fixed as stator and case of transmission.
In order to guarantee that output shaft can rotate freely, there are seams between the side and output shaft of the insertion gear of first bearing 2
Gap.
Further, the wheel teeth portion 6 for transmission, wheel teeth portion 6 and output shaft integrated molding are additionally provided on output shaft.
Further, the inner ring of second bearing 3 is sheathed on the other end of output shaft, the inner ring and output shaft of second bearing 3
Interference fit, output shaft drive the inner ring of second bearing 3 integrally to rotate.
Further, the outer ring of second bearing 3 is connected and fixed as stator and case of transmission.
In the present embodiment, the retainer speed of first bearing 2 is different from the retainer speed of second bearing 3,
When first bearing 2 and second bearing 3 become vibration source due to certain defect, the noise frequency for vibrating generation is also different, keeps away
Exempt from the possibility for being superimposed and generating bigger noise with frequency noise sound wave, improves the NVH performance of transmission system；In addition, by first
Bearing 2 is installed in gear in a manner of insertion, can shorten the axial length of output shaft, to reduce integrally-built peace
Space is filled, so that the structure of entire output shaft is more compact, further decreases the volume of speed changer.
Important component of the speed changer as automobile has the normally travel, dynamic property and economy of vehicle
Significant impact, it is also higher and higher to the design requirement of automotive transmission with the continuous development of automotive engineering, and of the invention
Technical solution helps to realize more lightweight, miniaturization, mute of speed changer etc..
It should be noted that the present embodiment illustrate only support construction of the invention answering on transmission output shaft
With, actually technical solution of the present invention other transmission shafts for also can be applied to speed changer, or it is applied to other automobiles zero
The transmission shaft of component.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of support construction of transmission shaft characterized by comprising
Transmission shaft；
First bearing, the first bearing include the first outer ring and the first inner ring, first outer ring and the one of the transmission shaft
End connection；
Second bearing, the second bearing include the second outer ring and the second inner ring, and second inner ring is sheathed on the transmission shaft；
Wherein, the transmission shaft drives first outer ring and second inner ring integrally to rotate.
2. support construction according to claim 1, which is characterized in that the first bearing and the second bearing are angle
Contact bearing.
3. support construction according to claim 2, which is characterized in that the first bearing further includes the first retainer, institute
Stating second bearing further includes the second retainer, the speed of the speed of first retainer and second retainer
It is different.
4. support construction according to claim 3, which is characterized in that the speed of first retainer isThe speed of second retainer isWherein γ be defined as Dcos α/
dm, D is the diameter of bearing roller, and α is the contact angle of bearing, dmFor the pitch diameter of bearing, n is the revolving speed of transmission shaft.
5. support construction according to claim 1, which is characterized in that the transmission shaft further includes interconnecting piece, the connection
Portion is located at one end of the transmission shaft, and the interconnecting piece is connected and fixed with first outer ring.
6. support construction according to claim 1, which is characterized in that one end of the transmission shaft is socketed with driving member, institute
It states driving member and the transmission shaft is rigidly connected, the inner wall of the driving member is not rotatably connected with first outer ring.
7. support construction according to claim 6, which is characterized in that first inner ring can not be revolved by the first fixing piece
It is fixed to turn ground.
8. support construction according to claim 7, which is characterized in that second outer ring can not be revolved by the second fixing piece
It is fixed to turn ground.
9. support construction according to claim 8, which is characterized in that the first bearing is close to the side of the transmission shaft
There are gaps between the transmission shaft.
10. support construction according to claim 9, which is characterized in that be additionally provided with the wheel for transmission on the transmission shaft
Teeth portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495823.9A CN110360302A (en) | 2019-06-10 | 2019-06-10 | A kind of support construction of transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910495823.9A CN110360302A (en) | 2019-06-10 | 2019-06-10 | A kind of support construction of transmission shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110360302A true CN110360302A (en) | 2019-10-22 |
Family
ID=68216914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910495823.9A Pending CN110360302A (en) | 2019-06-10 | 2019-06-10 | A kind of support construction of transmission shaft |
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Application publication date: 20191022 |