CN104875574B - A kind of macpherson suspension assembly - Google Patents
A kind of macpherson suspension assembly Download PDFInfo
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- CN104875574B CN104875574B CN201510351196.3A CN201510351196A CN104875574B CN 104875574 B CN104875574 B CN 104875574B CN 201510351196 A CN201510351196 A CN 201510351196A CN 104875574 B CN104875574 B CN 104875574B
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- rotary shaft
- knuckle
- swing arm
- lower swing
- shock absorber
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Abstract
The invention provides a kind of macpherson suspension assembly, including macpherson suspension and knuckle, also include connecting bracket, the first rotary shaft and the second rotary shaft, wherein, connecting bracket includes shock absorber fixing hole, lower swing arm fixing hole, knuckle upper end mounting hole and knuckle lower end mounting hole；The upper end of knuckle is connected by the first rotary shaft with knuckle upper end mounting hole, and lower end is connected by the second rotary shaft with knuckle lower end mounting hole, and the rotary shaft of the first rotary shaft and the second rotary shaft is located along the same line.Be fixed on knuckle in connecting bracket by the present invention, shock absorber is connected with shock absorber fixing hole, lower swing arm is rotated with lower swing arm fixing hole and is connected, so knuckle rotates around two rotary shafts, the locus of the fixing point of knuckle stablizes constant, the stable performance of automobile suspension system and steering.
Description
Technical field
The present invention relates to automobile steering system, more particularly to a kind of macpherson suspension assembly.
Background technology
Automotive suspension is the important component for ensureing riding comfort, automotive suspension as vehicle body (or vehicle frame) and axletree (or
Wheel) between make the force transferring part that connects, be again the important component for ensureing ride safety of automobile.
Independent suspension is that the wheel of left and right two on an axletree by automobile is individually installed on vehicle body (or vehicle frame)
Under, vehicle bridge uses breakaway-element, and middle one section is fixed on vehicle body (or vehicle frame), mutual not shadow when the sidecar wheel of independent suspension two is hit
Sound, and independent suspension lighter weight, buffering are very strong with damping capacity, and riding comfort is good, every relative to rigid axle suspension
Index is all more excellent.
Present Independent Suspension including macpherson suspension, double cross arm independent suspension and multi-connecting-rod separated suspension etc.,
Wherein, macpherson suspension is with its simple structure, light weight, the advantages of fast response time, is used widely.
As shown in figure 1, existing macpherson suspension assembly includes macpherson suspension 1' and knuckle 2', its
In, the upper end of knuckle 2' is connected with the shock absorber 11' of macpherson suspension 1', and the lower end of knuckle 2' passes through ball pin 21'
It is connected with the lower swing arm 12' of macpherson suspension 1'.
Vehicle in the process of moving, the fixing point and vibration damping of the lower swing arm 12' and knuckle 2' of macpherson suspension 1'
Relative distance between the fixing point of device 11' and knuckle 2' is continually changing, when being jumped on vehicle, lower swing arm 12' and knuckle
The distance between the fixing point and shock absorber 11' of 2' and the fixing point of knuckle 2' reduce, conversely, when being jumped under vehicle, the bottom
The increase of the distance between the fixing point and shock absorber 11' of arm 12' and knuckle 2' and the fixing point of knuckle 2'.Further,
The fixing point and shock absorber 11' of the lower swing arm 12' and knuckle 2' of macpherson suspension 1' and the fixing point of knuckle 2' it
Between relative distance change only along vertical direction distance change, also with vehicle fore-and-aft direction (i.e. along
Horizontal direction) distance change, these distance changes cause the major parameters such as camber angle, back rake angle and the toe-in of steering
It is continually changing so that the steering behaviour of automobile is unstable, meanwhile, the unstable of steering influences McPherson independence again in turn
The performance of suspension 1'.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of locus of the fixing point of knuckle to stablize constant, vapour
The macpherson suspension assembly of the stable performance of suspension system and steering.
In order to solve the above technical problems, including that McPherson is independently hanged the invention provides a kind of macpherson suspension assembly
Frame and knuckle, also including connecting bracket, the first rotary shaft and the second rotary shaft, wherein, the connecting bracket includes shock absorber
Fixing hole, lower swing arm fixing hole, knuckle upper end mounting hole and knuckle lower end mounting hole；
The shock absorber of the macpherson suspension is connected with the shock absorber fixing hole, the macpherson suspension
Lower swing arm is rotated with the lower swing arm fixing hole and is connected；
The upper end of the knuckle is connected by first rotary shaft with knuckle upper end mounting hole, described turn
Lower end to section is connected by second rotary shaft with knuckle lower end mounting hole, so that the knuckle can be around institute
State the first rotary shaft and second rotary shaft rotate, and first rotary shaft and second rotary shaft rotation
Axle is located along the same line.
Preferably, the connecting bracket includes the shock absorber fixed part, linking arm and the lower swing arm fixed part that are sequentially connected；
The shock absorber fixed part includes the shock absorber fixed part main body of column and consolidates with the shock absorber fixed part main body
Knuckle upper end installing plate even, the shock absorber fixing hole is set along the short transverse of the shock absorber fixed part main body,
Knuckle upper end mounting hole site is on the installing plate of the knuckle upper end；
The lower swing arm fixed part includes the lower swing arm fixed part main body of column and consolidates with the lower swing arm fixed part main body
Knuckle lower end installing plate even, the lower swing arm fixing hole is set along the short transverse of the lower swing arm fixed part main body,
Knuckle lower end mounting hole site is on the installing plate of the knuckle lower end.
It is highly preferred that the center line phase of the center line of the shock absorber fixed part main body and the lower swing arm fixed part main body
Vertically.
It is highly preferred that the gap being connected with the shock absorber fixing hole is provided with the shock absorber fixed part main body,
The both sides of the gap are provided with fixed block, and connecting hole is provided with the fixed block.
It is highly preferred that the first rotary shaft main body of first rotary shaft including column and with the first rotary shaft main body
Connected the first fixed plate in a bottom surface, the first rotary shaft fixing hole is set in first fixed plate, on the knuckle
The first rotary shaft location hole corresponding with the first rotary shaft fixing hole is provided with the installing plate of end；
Second rotary shaft includes the second rotary shaft main body of column and a bottom with the second rotary shaft main body
The second connected fixed plate of face, sets the second rotary shaft fixing hole, knuckle lower end installing plate in second fixed plate
On be provided with the second rotary shaft location hole corresponding with the second rotary shaft fixing hole.
It is highly preferred that the linking arm includes the first linking arm and the second linking arm, first linking arm has first
Bending section, second linking arm has the second bending section.
It is highly preferred that also including the lower swing arm rotary shaft passed through from the lower swing arm and the lower swing arm fixing hole, institute
State and be provided with bushing between lower swing arm rotary shaft and the lower swing arm fixing hole.
It is highly preferred that the linking arm includes the first linking arm and the second linking arm, first linking arm has first
Bending section, second linking arm has the second bending section；
The lower swing arm via passed through for lower swing arm, first linking arm are provided with the lower swing arm fixed part main body
With the both sides that second linking arm is arranged on the lower swing arm via.
The macpherson suspension assembly that the present invention is provided is fixed knuckle by the first rotary shaft and the second rotary shaft
In connecting bracket, the shock absorber of macpherson suspension and the shock absorber fixing hole of connecting bracket are connected, lower swing arm be connected
The lower swing arm fixing hole of support rotates connection, and such knuckle rotates around two rotary shafts, the fixing point of knuckle
Locus stablize constant, the stable performance of automobile suspension system and steering.
Brief description of the drawings
Fig. 1 is the structural representation of existing macpherson suspension assembly；
Fig. 2 is the structural representation of macpherson suspension assembly embodiment of the present invention；
Fig. 3 is the profile of Fig. 2；
Fig. 4 is the structural representation of the connecting bracket embodiment of macpherson suspension assembly of the present invention；
Fig. 5 is the structural representation of the first rotary shaft embodiment of macpherson suspension assembly of the present invention；
Fig. 6 is the part sectioned view of Fig. 2.
Indicated in figure as follows：
Macpherson suspension -1', shock absorber -11', lower swing arm -12', knuckle -2', ball pin -21', McPherson independence
Suspension -1, shock absorber -11, lower swing arm -12, knuckle -2, connecting bracket -3, shock absorber fixed part -31, shock absorber fixed part master
Body -311, shock absorber fixing hole -3111, gap -3112, fixed block -3113, connecting hole -31130, knuckle upper end installing plate -
312, knuckle upper end mounting hole -3121, the first rotary shaft location hole -3122, linking arm -32, the first linking arm -321, first
Bending section -3211, the second linking arm -322, the second bending section -3221, lower swing arm fixed part -33, lower swing arm fixed part main body -
331, lower swing arm fixing hole -3311, lower swing arm via -3312, knuckle lower end installing plate -332, knuckle lower end mounting hole -
3321, the first rotary shaft -4, the first rotary shaft main body -41, the first fixed plate -42, the first rotary shaft fixing hole -421, the second rotation
Rotating shaft -5, lower swing arm rotary shaft -6, bushing -7, subframe -8.
Specific embodiment
To enable above-mentioned purpose, the feature and advantage of invention more obvious understandable, below to specific implementation of the invention
Mode is described in detail.
Many details are elaborated in the following description in order to fully understand the present invention, but the present invention can be with
Other manner described here is different from using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
As shown in Figures 2 to 6, the present invention provide macpherson suspension assembly, including macpherson suspension 1 and turn
To section 2, also including connecting bracket 3, the first rotary shaft 4 and the second rotary shaft 5, wherein, the connecting bracket 3 is solid including shock absorber
Determine hole 3111, lower swing arm fixing hole 3311, knuckle upper end mounting hole 3121 and knuckle lower end mounting hole 3321, above-mentioned connection
The concrete structure of support 3 can be set according to different arrangement space requirements, as long as there is shock absorber fixing hole 3111, lower swing arm
The structure of fixing hole 3311, knuckle upper end mounting hole 3121 and knuckle lower end mounting hole 3321, and can meet and McPherson
The installation requirement of independent suspension 1 and knuckle 2；
The shock absorber 11 of the macpherson suspension 1 is connected with the shock absorber fixing hole 3111, and the McPherson is only
The lower swing arm 12 of vertical suspension 1 is rotated with the lower swing arm fixing hole 3311 and is connected, and above-mentioned being connected can be using welding or bolt connection
Realized etc. mode, above-mentioned rotation connection can be realized by the way of rotary shaft；
The upper end of the knuckle 2 is connected by first rotary shaft 4 with knuckle upper end mounting hole 3121,
The lower end of the knuckle 2 is connected by second rotary shaft 5 with knuckle lower end mounting hole 3321, so that described
Knuckle 2 can rotate around first rotary shaft 4 and second rotary shaft 5, and first rotary shaft 4 and described
The rotary shaft of the second rotary shaft 5 is located along the same line.
The macpherson suspension assembly that the present invention is provided is consolidated knuckle 2 by the first rotary shaft 4 and the second rotary shaft 5
It is scheduled in connecting bracket 3, the shock absorber 11 of macpherson suspension 1 is connected with the shock absorber fixing hole 3111 of connecting bracket 3, under
Swing arm 12 is rotated with the lower swing arm fixing hole 3311 of connecting bracket 3 and is connected, and such knuckle 2 does rotation fortune around two rotary shafts
Dynamic, the locus of the fixing point of knuckle 2 stablizes constant, so that the camber angle of steering, back rake angle and toe-in etc. are main
Parameter constant, it is ensured that the stability of the steering behaviour of automobile, and automobile suspension system performance stability.
In a preferred embodiment of the invention, the connecting bracket 3 include be sequentially connected shock absorber fixed part 31,
Linking arm 32 and lower swing arm fixed part 33, above-mentioned shock absorber fixed part 31, the company between linking arm 32 and lower swing arm fixed part 33
The mode of connecing can be realized using being integrally formed or the mode such as welding；
The shock absorber fixed part main body 311 of the shock absorber fixed part 31 including column and with the shock absorber fixed part master
The connected knuckle upper end installing plate 312 of body 311, the shock absorber fixing hole 3111 is along the shock absorber fixed part main body
311 short transverse is set, and knuckle upper end mounting hole 3121 is located on knuckle upper end installing plate 312, above-mentioned
Being connected can be realized using welding or integrally formed mode；
The lower swing arm fixed part main body 331 of the lower swing arm fixed part 33 including column and with the lower swing arm fixed part master
The connected knuckle lower end installing plate 332 of body 331, the lower swing arm fixing hole 3311 is along the lower swing arm fixed part main body
331 short transverse is set, and knuckle lower end mounting hole 3321 is located at knuckle lower end installing plate 332, above-mentioned solid
Can even be realized using welding or integrally formed mode.Connecting bracket 3 in the embodiment is conducive to more easily realizing first
The requirement that the rotary shaft of the rotary shaft 5 of rotary shaft 4 and second is located along the same line, and can be more stable reliably only with McPherson
Vertical suspension 1 and knuckle 2 are connected.
In order to ensure the reliable and stable of the structure of connecting bracket 3, the center line of the shock absorber fixed part main body 311 with it is described
The center line of lower swing arm fixed part main body 331 is perpendicular.
In order to more easily shock absorber 11 is arranged in connecting bracket 3, set in the shock absorber fixed part main body 311
There is the gap 3112 being connected with the shock absorber fixing hole 3111, the both sides of the gap 3112 are provided with fixed block
3113, connecting hole 31130 is provided with the fixed block 3113, so, during mounting dampers 11, shock absorber 11 is inserted into vibration damping
In device fixing hole 3111, then passed through from the connecting hole 31130 of two fixed blocks 3113 by bolt, by nut it is urgent after
By shock absorber 11 it is solid and reliable be arranged on connecting bracket 3 on.
In order to more easily the first rotary shaft 4 and the second rotary shaft 5 are positioned in connecting bracket 3, prevent knuckle 2 from existing
Released during use, the first rotary shaft main body 41 of first rotary shaft 4 including column and with the first rotary shaft master
The first connected fixed plate 42 of one bottom surface of body 41, sets the first rotary shaft fixing hole 421, institute in first fixed plate 42
State and the first rotary shaft positioning corresponding with the first rotary shaft fixing hole 421 is provided with knuckle upper end installing plate 312
Hole 3122, so, low damage section upper end mounting hole 3121 and knuckle 2 are inserted the first rotary shaft main body 41 successively, and now first
The rotary shaft location hole 3122 of rotary shaft fixing hole 421 and first aligns, by bolt and the first rotary shaft fixing hole 421 and first
First rotary shaft 4 can be fixed on the knuckle upper end installing plate 312 of connecting bracket 3 for the cooperation of rotary shaft location hole 3122
On；
It will be apparent to those skilled in the art that the structure of the second rotary shaft 5 can be identical with the first rotary shaft 4, therefore, it is described
Second rotary shaft 5 includes the second rotary shaft main body of column and be connected with a bottom surface of the second rotary shaft main body second
Fixed plate, sets the second rotary shaft fixing hole in second fixed plate, be provided with knuckle lower end installing plate 332 with
The second corresponding rotary shaft location hole of the second rotary shaft fixing hole, the installation process of the second rotary shaft 5 and the first rotation
Axle 4 is identical, and the present invention is not repeated further herein.
Passed through from connecting bracket 3 for the ease of power transmission shaft, and in order to avoid connecting bracket 3 is interferenceed with circumferential component,
And improve connecting bracket 3 impact resistance, the linking arm 32 include the first linking arm 321 and the second linking arm 322, institute
Stating the first linking arm 321 has the first bending section 3211, and second linking arm 322 has the second bending section 3221, and above-mentioned the
The concrete shape of one bending section 3211 and the second bending section 3221 is set according to the actual requirements, for example, can be semicircle etc..
In another preferred embodiment of the invention, also including from the lower swing arm 12 and the lower swing arm fixing hole
The lower swing arm rotary shaft 6 passed through in 3311, lining is provided between the lower swing arm rotary shaft 6 and the lower swing arm fixing hole 3311
Set 7, plays bumper and absorbing shock and prevents the excessive wear in use of lower swing arm 12.So, knuckle 2 is around the first rotary shaft 4
Rotated with the second rotary shaft 5, lower swing arm 12 rotates around lower swing arm rotary shaft 6.
Further, the linking arm 32 includes the first linking arm 321 and the second linking arm 322, first linking arm
321 have the first bending section 3211, and second linking arm 322 has the second bending section 3221；
The lower swing arm via 3312 passed through for lower swing arm 12 is provided with the lower swing arm fixed part main body 331, it is described
First linking arm 321 and second linking arm 322 are arranged on the both sides of the lower swing arm via 3312, so, that is, ensure that
The intensity of linking arm 32, while easily lower swing arm 12 can also link together with connecting bracket 3.
By taking the embodiment in Fig. 2 and Fig. 3 as an example, macpherson suspension assembly of the invention when mounted, by shock absorber
11 are arranged in the shock absorber fixed part main body 311 of connecting bracket 3, and will be turned to by the first rotary shaft 4 and the second rotary shaft 5
Section 2 is arranged on the knuckle upper end installing plate 312 and knuckle lower end installing plate 332 of connecting bracket 3, then again by lower swing arm
12 one end is connected in the lower swing arm fixed part main body 331 of connecting bracket 3, and the other end of lower swing arm 12 is arranged on subframe 8
On, such knuckle 2 rotates around the first rotary shaft 4 and the second rotary shaft 5, the space of the fixing point of knuckle 2
Position stablizes constant, so that the major parameter such as the camber angle of steering, back rake angle and toe-in is constant, it is ensured that the steering of automobile
The stability of performance, and automobile suspension system performance stability.
Although present invention combination above example is described, the present invention is not limited to above-described embodiment,
And be only defined by the appended claims, those of ordinary skill in the art easily can modify and change to it, but simultaneously
Without departing from essential idea of the invention and scope.
Claims (6)
1. a kind of macpherson suspension assembly, including macpherson suspension and knuckle, it is characterised in that also including connection
Support, the first rotary shaft and the second rotary shaft, wherein, the connecting bracket includes shock absorber fixing hole, lower swing arm fixing hole, turns
To section upper end mounting hole and knuckle lower end mounting hole；
The shock absorber of the macpherson suspension is connected with the shock absorber fixing hole, the bottom of the macpherson suspension
Arm is rotated with the lower swing arm fixing hole and is connected；
The upper end of the knuckle is connected by first rotary shaft with knuckle upper end mounting hole, the knuckle
Lower end be connected with knuckle lower end mounting hole by second rotary shaft so that the knuckle can be around described
One rotary shaft and second rotary shaft rotate, and first rotary shaft and second rotary shaft rotation axle position
In on same straight line；
The connecting bracket includes the shock absorber fixed part, linking arm and the lower swing arm fixed part that are sequentially connected；
The shock absorber fixed part main body of the shock absorber fixed part including column and it is connected with the shock absorber fixed part main body
Knuckle upper end installing plate, the shock absorber fixing hole is set along the short transverse of the shock absorber fixed part main body, described
Knuckle upper end installing plate is provided with round table surface, and knuckle upper end mounting hole site is in the upper round table surface；
The lower swing arm fixed part main body of the lower swing arm fixed part including column and it is connected with the lower swing arm fixed part main body
Knuckle lower end installing plate, the lower swing arm fixing hole is set along the short transverse of the lower swing arm fixed part main body, described
Knuckle lower end installing plate is provided with lower round table surface, knuckle lower end mounting hole site in the lower round table surface, it is described on
Shelves are opened in the installation that round table surface constitutes the knuckle with the lower round table surface；
First rotary shaft includes the first rotary shaft main body of column and consolidates with a bottom surface of the first rotary shaft main body
The first fixed plate even, is provided with the first rotary shaft fixing hole, on the installing plate of the knuckle upper end in first fixed plate
It is provided with the first rotary shaft location hole corresponding with the first rotary shaft fixing hole；
Second rotary shaft includes the second rotary shaft main body of column and consolidates with a bottom surface of the second rotary shaft main body
The second fixed plate even, is provided with the second rotary shaft fixing hole, on the installing plate of the knuckle lower end in second fixed plate
It is provided with the second rotary shaft location hole corresponding with the second rotary shaft fixing hole.
2. macpherson suspension assembly according to claim 1, it is characterised in that the shock absorber fixed part main body
Center line is perpendicular with the center line of the lower swing arm fixed part main body.
3. macpherson suspension assembly according to claim 1, it is characterised in that in the shock absorber fixed part main body
The gap being connected with the shock absorber fixing hole is provided with, the both sides of the gap are provided with fixed block, the fixed block
On be provided with connecting hole.
4. macpherson suspension assembly according to claim 1, it is characterised in that the linking arm includes the first connection
Arm and the second linking arm, first linking arm have the first bending section, and second linking arm has the second bending section.
5. macpherson suspension assembly according to claim 1, it is characterised in that also including from the lower swing arm and institute
The lower swing arm rotary shaft passed through in lower swing arm fixing hole is stated, is set between the lower swing arm rotary shaft and the lower swing arm fixing hole
There is bushing.
6. macpherson suspension assembly according to claim 1, it is characterised in that the linking arm includes the first connection
Arm and the second linking arm, first linking arm have the first bending section, and second linking arm has the second bending section；
The lower swing arm via passed through for lower swing arm, first linking arm and institute are provided with the lower swing arm fixed part main body
State the both sides that the second linking arm is arranged on the lower swing arm via.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351196.3A CN104875574B (en) | 2015-06-23 | 2015-06-23 | A kind of macpherson suspension assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351196.3A CN104875574B (en) | 2015-06-23 | 2015-06-23 | A kind of macpherson suspension assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104875574A CN104875574A (en) | 2015-09-02 |
| CN104875574B true CN104875574B (en) | 2017-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510351196.3A Active CN104875574B (en) | 2015-06-23 | 2015-06-23 | A kind of macpherson suspension assembly |
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| CN (1) | CN104875574B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106627024A (en) * | 2016-12-01 | 2017-05-10 | 浙江吉利控股集团有限公司 | Macpherson independent suspension structure |
| CN106671715B (en) * | 2016-12-27 | 2023-08-15 | 广州汽车集团股份有限公司 | Automobile and Macpherson suspension |
| CN107554607B (en) * | 2017-08-31 | 2019-08-06 | 安徽江淮汽车集团股份有限公司 | Steering pair and its automobile being placed on double cross arm independent suspension |
| CN107627801A (en) * | 2017-08-31 | 2018-01-26 | 安徽江淮汽车集团股份有限公司 | Steering pair and the automobile being placed on macpherson suspension |
| CN113002260A (en) * | 2021-03-16 | 2021-06-22 | 东风汽车集团股份有限公司 | Knuckle and shock absorber connection assembly, suspension system and automobile |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2663266B1 (en) * | 1990-06-15 | 1992-10-16 | Peugeot | DEVICE FOR CONNECTING A STEERING WHEEL TO THE BODY OF A MOTOR VEHICLE. |
| EP1319533A1 (en) * | 2001-12-14 | 2003-06-18 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Wheel suspension for a motor vehicle |
| US7490840B2 (en) * | 2005-06-23 | 2009-02-17 | Gm Global Technology Operations, Inc. | Steering and suspension system for a vehicle |
| DE102005029641B4 (en) * | 2005-06-23 | 2020-04-30 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Suspension |
| CN103121387B (en) * | 2013-02-07 | 2015-07-22 | 柳州孔辉汽车科技有限公司 | MacPherson air suspension and assembly method thereof |
| CN103660829B (en) * | 2013-12-12 | 2016-03-30 | 北京长安汽车工程技术研究有限责任公司 | A kind of McPherson automobile front suspension structure |
| CN104527354A (en) * | 2015-01-26 | 2015-04-22 | 安徽江淮汽车股份有限公司 | Swing arm bushing structure and automobile |
| CN204701411U (en) * | 2015-06-23 | 2015-10-14 | 安徽江淮汽车股份有限公司 | A kind of macpherson suspension and knuckle assembly |
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2015
- 2015-06-23 CN CN201510351196.3A patent/CN104875574B/en active Active
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