CN201613783U - Variable cross-section drive shaft - Google Patents
Variable cross-section drive shaft Download PDFInfo
- Publication number
- CN201613783U CN201613783U CN2010203008924U CN201020300892U CN201613783U CN 201613783 U CN201613783 U CN 201613783U CN 2010203008924 U CN2010203008924 U CN 2010203008924U CN 201020300892 U CN201020300892 U CN 201020300892U CN 201613783 U CN201613783 U CN 201613783U
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- CN
- China
- Prior art keywords
- semiaxis
- drive shaft
- diameter
- axle drive
- drive axis
- 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 - Fee Related
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a variable cross-section drive shaft; the diameter of the middle part of the semiaxis of a drive axis with maximum first order bending deformation is enlarged to form a step, improve the bending strength and tensional strength, effectively reduce the first order bending deformation amplitude of the drive axis and simultaneously improve the natural frequency of the drive axis to prevent the drive axis from the low frequency excitation of an engine; moreover, the diameter of the drive axis is reduced at the two ends of the semiaxis, thereby reaching the purposes of lightening the weight and reducing the cost.
Description
Technical field
The utility model belongs to automobile driving axle assembly technical field, and in particular, the utility model is a kind of variable section axle drive shaft.
Background technology
The single order mode of flexural vibration of axle drive shaft has significant impact to NVH (sound vibration roughness) Performance And Reliability, the durability of car load, yet, because automobile vendor generally faces and falls cost and weight-saving pressure.The weight of axle drive shaft is subjected to strict restriction, under the prerequisite that the length of axle drive shaft can not shorten, present known terms of settlement is that the semiaxis diameter with axle drive shaft reduces, but the profile of semiaxis there is not change, as shown in Figure 1, the cross section of semiaxis is a unmodified, though alleviated weight like this, but the single order natural bending frequency that also can cause axle drive shaft lower (being lower than 200Hz), in low-frequency range, the excitation that axle drive shaft very easily is subjected to driving engine produces resonance, not only can cause reduce the service life of axle drive shaft itself, also can cause reduce the service life of other parts on the automobile.
The utility model content
The semiaxis diameter because of axle drive shaft reduces to cause axle drive shaft single order natural bending frequency lower to the utility model in the prior art in order to solve, thereby the excitation that makes axle drive shaft be vulnerable to driving engine produces problems such as resonance, and a kind of variable section axle drive shaft is provided.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of variable section axle drive shaft, comprise semiaxis and the universal-joint that is assemblied in the semiaxis two ends, and described semiaxis is a stepped shaft, the centre is provided with the step of evagination.Middle part in axle drive shaft semiaxis single order flexural deformation amplitude maximum, strengthen its diameter, improve the bending strength and the torsional strength of axle drive shaft semiaxis, effectively reduce the single order flexural deformation amplitude of axle drive shaft, can also improve simultaneously the natural frequency of axle drive shaft, make it avoid the low-frequency excitation of driving engine; The two ends of semiaxis, its single order flexural deformation amplitude is little, reduces its diameter, thereby reaches the purpose of expendable weight, cost-cutting.
As preferably, the diameter of described step is than the big 10%-20% of diameter at semiaxis two ends.If the difference ratio of stepped diameters and semiaxis two ends diameter exceeds the 10%-20% scope, though also can reach the requirement of bending strength and torsional strength, the purpose of out of reach expendable weight, cost-cutting.Existing its cross section of semiaxis is a unmodified, compare with existing semiaxis, the stepped diameters of the utility model semiaxis middle part is bigger than the existing semiaxis diameter of equal performance requriements, and the diameter at the utility model semiaxis two ends is littler than the existing semiaxis diameter of equal performance requriements.
As preferably, the length coincidence formula of described step (2)
Wherein,
d
2Be the diameter at semiaxis (1) two ends, d
3Be the diameter of step (2), L is the length of semiaxis (1).The difference ratio of stepped diameters and semiaxis two ends diameter has determined the length of step, and difference ratiometric span is 10%-20%, and difference is big more, and then the length of step is more little.
As preferably, be provided with the fillet that seamlessly transits between the adjacent cascaded surface of described stepped shaft.By level and smooth round-corner transition, can avoid stress concentration between the adjacent cascaded surface, improve the bending strength and the torsional strength of semiaxis.
The beneficial effects of the utility model: semiaxis adopts the stepped shaft of variable section, the bending strength and the torsional strength of axle drive shaft have been improved, effectively reduce the single order flexural deformation amplitude of axle drive shaft, can also improve the natural frequency of axle drive shaft simultaneously, make it avoid the low-frequency excitation of driving engine; Alleviate complete vehicle weight, cost-cutting, meet automobile weight-saving development tendency.
Description of drawings
Fig. 1 is the outside drawing of existing axle drive shaft;
Fig. 2 is an outside drawing of the present utility model;
Fig. 3 is the dimension figure of existing axle drive shaft semiaxis;
Fig. 4 is the dimension figure of the utility model semiaxis.
Description of reference numerals: 1---semiaxis, 2---step.
The specific embodiment
The utility model will be further described below in conjunction with accompanying drawing.
Embodiment 1:
Shown in Fig. 3,4, the length L=500mm of semiaxis 1, density of material are 7.8g/cm
3, apply moment K=6000N/mm, the semiaxis diameter d of step 2 both sides
2=25mm, the diameter d of step 2
3=27.5mm, the then length L of step 2
1=200mm is according to the quality m=2074.166g that calculates semiaxis 1; By the computer software simulation, under rigidity condition and the strength condition prerequisite the same, by existing technical scheme design-calculated semiaxis 1 diameter d with the utility model embodiment 1 scheme
1=26.4mm is according to the quality m=2133.743g that calculates semiaxis 1; The quality of this use New Scheme alleviates 2.79%.
Embodiment 2:
Shown in Fig. 3,4, the length L=500mm of semiaxis 1, density of material are 7.8g/cm
3, apply moment K=6000N/mm, the semiaxis diameter d of step 2 both sides
2=25mm, the diameter d of step 2
3=28.75mm, the then length L of step 2
1=90mm is according to the quality m=2024.513g that calculates semiaxis 1; By the computer software simulation, under rigidity condition and the strength condition prerequisite the same, by existing technical scheme design-calculated semiaxis 1 diameter d with the utility model embodiment 2 schemes
1=26.3mm is according to the quality m=2117.609g that calculates semiaxis 1; The quality of this use New Scheme alleviates 4.40%.
Embodiment 3:
Shown in Fig. 3,4, the length L=500mm of semiaxis 1, density of material are 7.8g/cm
3, apply moment K=6000N/mm, the semiaxis diameter d of step 2 both sides
2=25mm, the diameter d of step 2
3=30mm, the then length L of step 2
1=50mm is according to the quality m=1997.629g that calculates semiaxis 1; By the computer software simulation, under rigidity condition and the strength condition prerequisite the same, by existing technical scheme design-calculated semiaxis 1 diameter d with the utility model embodiment 3 schemes
1=25.8mm is according to the quality m=2037.857g that calculates semiaxis; The quality of this use New Scheme alleviates 1.97%.
Claims (4)
1. variable section axle drive shaft comprises semiaxis (1) and is assemblied in the universal-joint at semiaxis two ends that it is characterized in that described semiaxis (1) is a stepped shaft, the centre is provided with the step (2) of evagination.
2. a kind of variable section axle drive shaft according to claim 1 is characterized in that, the diameter of described step (2) is than the big 10%-20% of diameter at semiaxis (1) two ends.
3. a kind of variable section axle drive shaft according to claim 2 is characterized in that, the length coincidence formula of described step (2)
Wherein,
d
2Be the diameter at semiaxis (1) two ends, d
3Be the diameter of step (2), L is the length of semiaxis (1).
4. a kind of variable section axle drive shaft according to claim 1 is characterized in that, is provided with the fillet that seamlessly transits between the adjacent cascaded surface of described stepped shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203008924U CN201613783U (en) | 2010-01-18 | 2010-01-18 | Variable cross-section drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203008924U CN201613783U (en) | 2010-01-18 | 2010-01-18 | Variable cross-section drive shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201613783U true CN201613783U (en) | 2010-10-27 |
Family
ID=43000155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010203008924U Expired - Fee Related CN201613783U (en) | 2010-01-18 | 2010-01-18 | Variable cross-section drive shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201613783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283237A (en) * | 2020-09-22 | 2021-01-29 | 东风汽车底盘系统有限公司 | Shaft tube reducing aluminum alloy transmission shaft of medium and heavy commercial vehicle |
-
2010
- 2010-01-18 CN CN2010203008924U patent/CN201613783U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283237A (en) * | 2020-09-22 | 2021-01-29 | 东风汽车底盘系统有限公司 | Shaft tube reducing aluminum alloy transmission shaft of medium and heavy commercial vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20140118 |