CN101830148B - Light automotive rear axle - Google Patents
Light automotive rear axle Download PDFInfo
- Publication number
- CN101830148B CN101830148B CN 201010182238 CN201010182238A CN101830148B CN 101830148 B CN101830148 B CN 101830148B CN 201010182238 CN201010182238 CN 201010182238 CN 201010182238 A CN201010182238 A CN 201010182238A CN 101830148 B CN101830148 B CN 101830148B
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- welding assembly
- welded
- rear axle
- swing arm
- magnesium alloy
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Abstract
The invention relates to an automotive part, in particular to a light automotive rear axle, which comprises a front connected and welded assembly, a swing arm supporting box body welded assembly and a rear connected and welded assembly, all of which are made of magnesium alloy materials. The whole rear axle adopts a basically symmetrical structure; the front connected and welded assembly is formed by welding an elastic lining, left and right front supporting plates and left and right front covers; the swing arm supporting box body welded assembly consists of a box body, an insert piece, a bottom plate and a partition plate, and the box body is provided with bolt holes which are used for connecting the two lateral swing arms of a rear suspension system; and the rear connected and welded assembly comprises an elastic lining, left and right cross stabilizing rod supports, left and right rear arms and upper and lower covers. The static performance and dynamic performance of the automotive rear axle of the invention meet service requirements, and the design of introducing the magnesium alloy material into the automotive rear axle has a great significance for improving automotive lightweight technical level and promoting the development of the magnesium alloy industry in China.
Description
Technical field
The present invention relates to a kind of automotive parts, particularly a kind of light automotive rear axle.
Background technology
At present, along with improving constantly of living standards of the people, also increasing to the demand of automobile.The yearly output of each big car company becomes ascendant trend year by year.Meanwhile, the oil resources day of countries in the world is becoming tight, and oil price rises steadily.Environmental pollution and energy scarcity will become the major issue of restriction Domestic Automotive Industry sustainable development, no matter consider from economic benefit or social benefit, the automobile of low oil consumption, anti-emission carburetor will be the needs of conservation-minded society's development.Automobile is carried out light-weight design, and alleviating vehicle weight is to address the above problem, and keeps that automobile industry continues, the place of key of healthy development.The scheme of carrying out light-weight design both at home and abroad mainly contains three kinds: a kind of is the light-weight design of materials used in auto manufacturing; Promptly select for use lighting, high-strength materials to replace the iron and steel material, these materials mainly contain high strength steel, alloy in lightweight, plastics and composite material thereof etc.Another kind is the light-weight design of structure technology, and finite element method commonly used and Optimization Design are carried out structural development and optimal design, with quality that reduces parts and the weight that quantity alleviates car load.The third is the light-weight design of technology, the low load reinforcing technology that for example adopts the laser assembly solder technology, shaped by fluid pressure is technological, high-strength thermal forming is technological and fully excavates structure, strength of material potential.Utilize the low load reinforcing property of metallic material, gearbox gear is used new break-in standard, can improve the intensity and the life-span of gear, thereby carry out light-weight design.These technology can not only realize the automobile lightweight, also increased substantially automobile crash survivability, reduced manufacturing cost.
Rear axle links to each other with suspension with vehicle body as important load-carrying unit of chassis system, and main effect is the coupling stiffness that improves suspension, reduces importing into of road shock, thereby brings good comfort.Before because aspect such as environment for use is abominable does not still adopt magnesium alloy to make the precedent of rear axle.
Summary of the invention
The purpose of this invention is to provide the light automotive rear axle that a kind of intensity is big, in light weight, structure is more excellent; For reaching the foregoing invention purpose; Connect welding assembly, swing arm supporting box welding assembly before rear axle of the present invention comprises and is connected with the back and welds three parts of assembly, these three part weld togethers, wherein: preceding connection is welded assembly and is welded by right front cover, left front cover, right anterior branch board, left front back plate, resilient bushing; Be furnished with auxiliary hole on the front shroud of the left and right sides, be convenient to hold-down bolt; Swing arm supporting box welding assembly is made up of casing, inserted sheet, base plate, dividing plate, and casing is provided with bolt hole, is used to connect the both sides swing arm of rear-suspension system, and inserted sheet is used for fixing nut; The back connects the welding assembly and is welded by resilient bushing, left lateral stability shaft bar, right back arm, lower cover, loam cake, right lateral stability shaft bar, left back arm.
Further, connect before said welding assembly, swing arm supporting box welding assembly with after to be connected the manufacturing materials of welding assembly be magnesium alloy.
Preferably, above-mentioned magnesium alloy model is JDM2, and its density is 1.93g/cm
3, elastic modulus E=55Gpa, Poisson's ratio are 0.35.
Compare with the steel back axle of original same structure, a kind of magnesium alloy back axle of the present invention has the in-use performance identical with the steel back axle, on intensity, displacement deformation, dynamic property even also slightly be superior to the steel back axle of same structure.According to auto vendor the static state evaluation of back axle is required the steel back axle of magnesium alloy back axle of the present invention and a kind of same structure has been carried out intensity, displacement deformation comparative analysis, the result is as shown in table 1.
Table 1 magnesium alloy back axle and steel Rear Axle, displacement deformation comparative analysis result
Analysis result shows: magnesium alloy back axle suffered maximum stress value under each operating mode all descends to some extent; The displacement structural strain's reduced after Rear secondary frame for vehicle improved design under most of operating modes, and fraction operating mode displacement and original auxiliary vehicle frame are suitable basically.Explain that the static properties of magnesium alloy back axle of the present invention fully satisfies the operating needs of back axle, be superior to the steel back axle of present widely used same structure.
In order to investigate the dynamic property of back axle, the steel back axle of magnesium alloy back axle of the present invention and a kind of same structure has been carried out the mode comparative analysis, the model frequency result is as shown in table 2.
Analysis result shows that improving each rank mode of the more original back axle of design back axle improves a lot, and explains that the dynamic property of magnesium alloy back axle of the present invention also satisfies the operating needs of back axle, and slightly is superior to the steel back axle of same structure.
Under the prerequisite that satisfies the back axle operating needs, magnesium alloy back axle designing quality of the present invention is about 5kg, and the steel back axle quality of similar structures is 10.1kg, compares loss of weight 50%, has significant technical advantage and great marketable value.
The benefit that magnesium alloy parts brings automobile is conspicuous.The one, its light weight is used magnesium alloy instead and can be alleviated complete vehicle weight, has also just reduced fuel consumption indirectly.The 2nd, its strength-to-density ratio is higher than aluminum alloy and steel, and stiffness-to-density ratio can be born certain load near aluminum alloy and steel.The 3rd, it has good castability and dimensional stability, processing easily, and reject rate is low, thereby reduces production costs.The 4th, it has good damping coefficient, and the vibration damping amount is used for housing and can reduces noise greater than aluminum alloy and cast iron, is used for seat, wheel rim can reduce vibration, improves the safety and the traveling comfort of automobile.
The invention has the beneficial effects as follows: the magnesium alloy back axle that the present invention relates to has combined the application of new material and light in structure to quantize the design-calculated advantage; And utilize Finite Element Method that structural strength and modal stiffness are analyzed, improved; And used reasonable manufacturing process, finally reach the lightweight effect of loss of weight 50%.The present invention has initiative practical reference value for going in the important carrying parts of magnesium alloy materials being introduced passenger-car chassis, for the automobile light-weight design provides a kind of new approaches.
Description of drawings
Fig. 1 is a magnesium alloy back axle assembly scheme drawing of the present invention;
Fig. 2 is preceding connection welding assembly intention;
Fig. 3 is swing arm supporting box welding assembly intention;
Fig. 4 shows scheme drawing for the back connects the welding assembly.
The specific embodiment
The present invention will be described below in conjunction with accompanying drawing and the specific embodiment.
See also Fig. 1, a kind of magnesium alloy rear axle of the present invention comprises preceding welding assembly 1, swing arm supporting box welding assembly 2,3 three parts of back connection welding assembly of connecting.These three assemblies are welded to each other and form, according to four elastic support location.
See also Fig. 2, preceding connection welding assembly 1 is made up of right front cover 101, left front cover 102, left front back plate 103, right anterior branch board 104, resilient bushing 105.Earlier with about before back plate be connected with each other, on the back plate 103,104, resilient bushing 105 is installed again before then left and right sides front shroud 102,101 being welded on respectively.On left and right sides front shroud 102,101, be furnished with auxiliary hole, be convenient to install the bolt that connects swing arm.
See also Fig. 3; Swing arm supporting box welding assembly 2 is made up of casing 201, inserted sheet 202, base plate 203, dividing plate 204; Dividing plate 204 is welded on respectively on the casing 201 with inserted sheet 202, again with base plate 203 about seam constitute the swing arm supporting box together and weld assembly 2.Respectively there are four bolts hole casing 201 front and back, are used to connect the both sides swing arm of rear-suspension system, and inserted sheet 202 is used for fixing nut.
See also Fig. 4, the back connects welding assembly 3 and comprises resilient bushing 301, left lateral stability shaft bar 302, right back arm 303, lower cover 304, loam cake 305, right lateral stability shaft bar 306, left back arm 307.Connection welding assembly 3 in back is divided into the left, center, right three stage structure with the structure of two-piece type up and down of former steel structure.Left and right sides postbrachium adopts horizontal " day " word cross section structure, has played the effect of strengthening.Earlier left and right sides postbrachium 307,303 and loam cake 305 are welded, loam cake 305 compresses the left and right sides postbrachium seam along the edge respectively with lower cover 304 then.Be welded in postbrachium lower edge, the left and right sides to left and right sides lateral stability shaft bar 302 and 306 respectively again, resilient bushing 301 is installed at last.In fitting process, should guarantee that the position of resilient bushing 301 and left lateral stability shaft bar 302 is accurate.
Claims (3)
1. light automotive rear axle; Connecting welding assembly, swing arm supporting box welding assembly before it is characterized in that comprising is connected with the back and welds three parts of assembly; These three part weld togethers; According to four elastic supports location, wherein: preceding connection welding assembly is welded by right front cover (101), left front cover (102), left front back plate (103), right anterior branch board (104), resilient bushing (105), earlier with about before back plate be connected with each other; Then left front cover (102) and right front cover (101) are welded on respectively on left front back plate (103) and the right anterior branch board (104); Resilient bushing (105) is installed again, is furnished with auxiliary hole on the front shroud of the left and right sides, be convenient to hold-down bolt; Swing arm supporting box welding assembly is made up of casing (201), inserted sheet (202), base plate (203), dividing plate (204); Dividing plate (204) and inserted sheet (202) are welded on respectively on the casing (201); Again and base plate (203) up and down weld together constitute swing arm supporting box welding assembly; Casing (201) is provided with bolt hole, is used to connect the both sides swing arm of rear-suspension system, and inserted sheet (202) is used for fixing nut; The back connects the welding assembly and is welded by resilient bushing (301), left lateral stability shaft bar (302), right back arm (303), lower cover (304), loam cake (305), right lateral stability shaft bar (306), left back arm (307); Earlier left back arm (307) and right back arm (303) are welded with loam cake (305); Loam cake (305) and lower cover (304) compress left and right postbrachium respectively then; The seam along the edge; Be welded in left and right postbrachium lower edge to left lateral stability shaft bar (302) and right lateral stability shaft bar (306) respectively again, resilient bushing (301) is installed at last.
2. a kind of light automotive rear axle according to claim 1 is characterized in that, connect before said welding assembly, swing arm supporting box welding assembly with after to be connected the manufacturing materials of welding assembly be magnesium alloy.
3. a kind of light automotive rear axle according to claim 2 is characterized in that, said magnesium alloy model is JDM2, and its density is 1.93g/cm3, and elastic modulus E=55Gpa, Poisson's ratio are 0.35.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010182238 CN101830148B (en) | 2010-05-21 | 2010-05-21 | Light automotive rear axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010182238 CN101830148B (en) | 2010-05-21 | 2010-05-21 | Light automotive rear axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101830148A CN101830148A (en) | 2010-09-15 |
| CN101830148B true CN101830148B (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010182238 Expired - Fee Related CN101830148B (en) | 2010-05-21 | 2010-05-21 | Light automotive rear axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101830148B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201362307Y (en) * | 2009-03-07 | 2009-12-16 | 王永萍 | Novel electric motor car |
-
2010
- 2010-05-21 CN CN 201010182238 patent/CN101830148B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201362307Y (en) * | 2009-03-07 | 2009-12-16 | 王永萍 | Novel electric motor car |
Non-Patent Citations (3)
| Title |
|---|
| 周学华等.镁合金：汽车轻量化的必然选择.《新材料产业》.2006,(第11期),23-26. * |
| 孙景林等.镁合金在汽车轻量化方面的应用.《轻金属》.2008,(第7期),58-61. * |
| 郑松林等.轿车后副车架结构强度与模态分析.《上海汽车》.2009,(第11期),20-22. * |
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| Publication number | Publication date |
|---|---|
| CN101830148A (en) | 2010-09-15 |
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