CN217672827U - Special aluminum alloy rear auxiliary frame for electric SUV - Google Patents
Special aluminum alloy rear auxiliary frame for electric SUV Download PDFInfo
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- CN217672827U CN217672827U CN202220728335.5U CN202220728335U CN217672827U CN 217672827 U CN217672827 U CN 217672827U CN 202220728335 U CN202220728335 U CN 202220728335U CN 217672827 U CN217672827 U CN 217672827U
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 51
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
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- 239000000243 solution Substances 0.000 description 3
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- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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Abstract
The utility model discloses a special aluminum alloy rear auxiliary frame of an electric SUV, a left longitudinal beam is provided with a vehicle body left front mounting bush and a vehicle body rear bush respectively, a right longitudinal beam is provided with a vehicle body right front mounting bush and a vehicle body rear bush respectively, a rear cross beam is provided with a rear suspension sleeve, the left longitudinal beam and the right longitudinal beam are formed by casting, a front cross beam and a rear cross beam are formed by extrusion, and the left longitudinal beam, the front cross beam, the right longitudinal beam and the rear cross beam are all made of aluminum; the left longitudinal beam and the right longitudinal beam are cut to form a first mounting part for mounting the multi-link suspension; the left longitudinal beam and the right longitudinal beam are cut to form a second mounting part for mounting the adjusting rod; one end of the left longitudinal beam is welded with one end of the front cross beam, one end of the right longitudinal beam is welded with the other end of the front cross beam, the other end of the left longitudinal beam is welded with one end of the rear cross beam, and the other end of the right longitudinal beam is welded with the other end of the rear cross beam. The utility model discloses can reduce whole car unsprung mass under the prerequisite of guaranteeing performance.
Description
Technical Field
The utility model relates to an automobile parts field, concretely relates to sub vehicle frame behind electronic SUV's special aluminum alloy.
Background
The rear auxiliary frame is used as a special bearing structure for a multi-link suspension of a medium-large electric SUV, and has higher requirements on the outline and the service performance of the auxiliary frame due to the large weight of a vehicle body and the wide wheel track; considering from whole car, if select for use traditional steel sub vehicle frame, though the single-piece low cost, but incompatible to the use target of whole car, and weight is heavy, can't reach whole car user demand.
In addition, because the overall outline of the subframe has dimensions of 1.2 × 1 × 0.35 m, if an integral structure is used, the development cost and maintenance cost of the mold are high, the requirements on manufacturing equipment are correspondingly increased, and the control parameters of the integral casting process are more severe.
Disclosure of Invention
The utility model provides an electronic SUV's special aluminum alloy back sub vehicle frame, the utility model discloses can reduce whole car unsprung mass under the prerequisite of guaranteeing performance.
The technical scheme for solving the problems is as follows:
the special aluminum alloy rear auxiliary frame for the electric SUV comprises a left front vehicle body mounting bush, a left longitudinal beam, a front cross beam, a right longitudinal beam, a right front vehicle body mounting bush, a rear cross beam and a rear suspension sleeve, wherein the left front vehicle body mounting bush and the rear vehicle body rear bush are respectively arranged on the left longitudinal beam, the right longitudinal beam is respectively provided with the right front vehicle body mounting bush and the rear vehicle body rear bush, the rear cross beam is provided with the rear suspension sleeve, the left longitudinal beam and the right longitudinal beam are formed by casting, the front cross beam and the rear cross beam are formed by extrusion, and the left longitudinal beam, the front cross beam, the right longitudinal beam and the rear cross beam are made of aluminum;
the left longitudinal beam and the right longitudinal beam are cut to form a first mounting part for mounting the multi-link suspension;
the left longitudinal beam and the right longitudinal beam are cut to form a second mounting part for mounting the adjusting rod;
one end of the left longitudinal beam is welded with one end of the front cross beam, one end of the right longitudinal beam is welded with the other end of the front cross beam, the other end of the left longitudinal beam is welded with one end of the rear cross beam, and the other end of the right longitudinal beam is welded with the other end of the rear cross beam.
Preferably, the front cross beam and the rear cross beam are flat, and the wall thickness of the front cross beam and the wall thickness of the rear cross beam are 3-4mm.
Preferably, the left longitudinal beam and the right longitudinal beam are both hollow structures.
Preferably, the special aluminum alloy rear subframe for the electric SUV is prepared by the following method: s1, designing upper and lower metal molds which are attached to the shapes of the left longitudinal beam and the right longitudinal beam and a sand mold with hollow characteristics according to the external shapes and the internal hollow structures of the left longitudinal beam and the right longitudinal beam, so as to manufacture a sand core, putting the sand core into the metal molds, closing the molds for low-pressure casting, opening the molds after mold filling is completed, and taking out aluminum alloy castings, namely left longitudinal beam castings and right longitudinal beam castings;
s2, vibrating sand cores in the left longitudinal beam casting and the right longitudinal beam casting completely through vibration equipment;
s3, removing unnecessary gates, risers and the like on the left longitudinal beam casting and the right longitudinal beam casting, and polishing burrs;
s4, detecting internal defects of the left longitudinal beam casting and the right longitudinal beam casting through X-rays;
s5, performing heat treatment on the left longitudinal beam casting and the right longitudinal beam casting;
s6, detecting the crack states of the surfaces of the left longitudinal beam casting and the right longitudinal beam casting by using fluorescence;
s7, cutting the left longitudinal beam casting and the right longitudinal beam casting to form a first mounting part and a second mounting part on the left longitudinal beam casting and the right longitudinal beam casting respectively;
s8, respectively welding the left longitudinal beam and the right longitudinal beam with the front cross beam and the rear cross beam;
and S9, respectively press-fitting a left front mounting bush and a rear bush of the vehicle body on the left longitudinal beam, respectively press-fitting a right front mounting bush and a rear bush of the vehicle body on the right longitudinal beam, and monitoring the relationship between press-fitting force and displacement in the press-fitting process.
The utility model discloses a structure of special aluminum alloy rear auxiliary frame of electric SUV adopts the sectional type, welds into an entirety through foundry goods and extruded article, carries out machining again, gets rid of unnecessary material, guarantees the dimensional accuracy of each mounting point; all the main mounting points are arranged on the casting, and the casting is integrally cast, so that the arrangement and machining of all the mounting points are convenient; the inner part of the casting is of a cavity structure, so that the integral strength can be effectively improved; the performance of the extruded section is higher than that of a casting by more than 25 percent, so that the extruded section is used in a place with smooth transition and single structural feature, the development cost of the die can be effectively saved by more than 90 percent, and the weight is effectively reduced by more than 15 percent; the lining is arranged at the mounting position of the vehicle body, so that the effect of buffering and vibration isolation is achieved, the bumping experience brought by the height fluctuation of the road surface is buffered, and the noise generated in the driving process of the vehicle is reduced.
Drawings
Fig. 1 is a perspective view of the special aluminum alloy rear subframe of the electric SUV of the present invention;
FIG. 2 is a bottom view of the special aluminum alloy rear subframe of the electric SUV of the present invention;
the automobile body comprises a left front automobile body mounting bush 1, a left longitudinal beam 2, a front cross beam 3, a right longitudinal beam 4, a right front automobile body mounting bush 5, a rear bush 6, a rear cross beam 7, a rear suspension sleeve 8, first mounting portions 9, 10 and 11, second mounting portions 12 and 13 and a third mounting portion 14.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the utility model discloses an auxiliary frame behind electronic SUV's special aluminum alloy, including the left front installation bush 1 of automobile body, left longeron 2, front beam 3, right longeron 4, the right front installation bush 5 of automobile body, back bush 6, rear frame member 7, back suspension sleeve pipe 8, be provided with left front installation bush 1 of automobile body and automobile body back bush 6 on the left longeron 2 respectively, right longeron 4 is provided with right front installation bush 5 of automobile body and automobile body back bush 6 respectively, is provided with back suspension sleeve pipe 8 on the rear frame member 7.
The left longitudinal beam 2 and the right longitudinal beam 4 are formed by casting, the front cross beam 3 and the rear cross beam 7 are formed by extrusion, and the left longitudinal beam 2, the front cross beam 3, the right longitudinal beam 4 and the rear cross beam 7 are all made of aluminum; the left longitudinal beam 2 and the right longitudinal beam 4 are both hollow structures.
The two ends of the left longitudinal beam 2 and the right longitudinal beam 4 are provided with bushing mounting holes so as to be convenient for mounting a left front mounting bushing 1, a right front mounting bushing 5 and a rear bushing 6 of the vehicle body, the bushings and the mounting holes on the left longitudinal beam 2 and the right longitudinal beam 4 are in interference fit, and according to the use requirement, the minimum bushing release force is required to be more than or equal to 15KN; the wall thickness of the casting foundation of the left longitudinal beam 2 and the right longitudinal beam 4 is more than or equal to 4.5mm, according to the analysis of a casting mold filling process, the wall thickness is the optimal mold filling setting, although the use of materials can be reduced due to thinner wall thickness, the filling and complementing of aluminum liquid can be caused, the dissolution trace of the aluminum liquid is obvious, the use of materials is increased due to thicker wall thickness, and the over-design principle is caused due to over-strong strength.
The mounting bush 1, the right front mounting bush 5 and the rear bush 6 of the vehicle body are all silica gel bushes. The left front mounting bush 1, the right front mounting bush 5 and the rear bush 6 of the vehicle body can effectively filter vibration input by tires; the front control arm, the camber control arm, the upper control arm, the toe-in control arm and the lower control arm are installed and connected, and bear and transmit tire input vibration and bear a vehicle body; the electric driving device is arranged through the front suspension point and the rear suspension point, so that the stability of a power bearing structure is ensured; and a stabilizer bar is arranged, so that the roll angle rigidity of the whole vehicle is improved.
The left longitudinal beam 2 and the right longitudinal beam 4 are cut to form first mounting parts 9, 10 and 11 for mounting the multi-link suspension; when guaranteeing intensity and rigidity, the mode of using the machine to add the removal material guarantees dimensional accuracy, and the back of machine adds, must set up the fillet transition at the machine root, avoids the right angle effect to lead to stress concentration, makes whole car use because the product fracture that non-use factor leads to.
The left longitudinal beam 2 and the right longitudinal beam 4 are cut to form second mounting parts 12 and 13 for mounting the adjusting rod, materials are added and removed in the mounting area and the mounting area, mounting accuracy is guaranteed, waist-shaped holes are added in the mounting point position machine, and four-wheel positioning parameters can be conveniently adjusted in the loading process. The third mounting portions 14 for mounting the stabilizer bars are further welded to the left side member 2 and the right side member 4, and the stabilizer bars are not subjected to a large load, so that the third mounting portions 14 can meet the use requirements of the stabilizer bars.
One end of the left longitudinal beam 2 is welded with one end of the front cross beam 3, one end of the right longitudinal beam 4 is welded with the other end of the front cross beam 3, the other end of the left longitudinal beam 2 is welded with one end of the rear cross beam 7, and the other end of the right longitudinal beam 4 is welded with the other end of the rear cross beam 7. The front cross beam 3 and the rear cross beam 7 are flat and straight, and the wall thickness of the front cross beam 3 and the wall thickness of the rear cross beam 7 are 3-4mm. For the special aluminum alloy rear subframe for the electric SUV, straight portions are formed by the front cross member 3 and the rear cross member 7, and the front cross member 3 and the rear cross member 7 are obtained by extrusion molding.
Rear beam 7 is the rear beam of extrusion aluminium, and rear beam 7 middle part welding suspension sleeve 8, and here structure not only bears the torsion effect of sub vehicle frame simultaneously, also bears the support of electrically driving the back point simultaneously, so here structure cross-section demand is bigger, and rear beam 7's wall thickness preferentially adopts 4mm, can satisfy sub vehicle frame intensity requirement.
The utility model adopts a split structure, although the welding procedure of the components is increased, the casting yield of the casting can be improved by more than 25 percent compared with the integral structure, and the investment of the manufacturing equipment is greatly reduced compared with the integral investment; the efficiency of the casting process is improved when the reaction is carried out to the production flow, the production takt is accelerated, and the defective product repair rate is reduced.
The utility model discloses a sub vehicle frame adopts following method preparation behind electronic SUV's special aluminum alloy:
s1, designing upper and lower metal molds which are attached to the shapes of the left longitudinal beam 2 and the right longitudinal beam 4 and a sand mold with hollow characteristics according to the external shapes and the internal hollow structures of the left longitudinal beam 2 and the right longitudinal beam 4, manufacturing a sand core, putting the sand core into the metal molds, closing the molds for low-pressure casting, wherein the pressure in the whole low-pressure casting process is changed, so that the pressure range of the low-pressure casting is 220-550 Mpa, and opening the molds after the mold filling is finished to take out aluminum alloy castings, namely the left longitudinal beam 2 and the right longitudinal beam 4. The material of the left longitudinal beam 2 and the right longitudinal beam 4 cast is preferably A356.
A left longitudinal beam 2 and a right longitudinal beam 4 in the special aluminum alloy rear auxiliary frame of the electric SUV are of hollow low-pressure casting structures, in order to ensure full filling of aluminum liquid, the thickness of a foundation wall is more than or equal to 4.5mm, and the realization of the hollow characteristic, a sand core structure needs to be placed in a casting mould during casting, and the sand core needs to be finished under sand blasting equipment and the mould; positioning mounting holes are required to be formed in the sand core on a casting mould so as to ensure that the sand core is accurately placed in the casting mould, and the wall thickness of a part is qualified after mould assembly and casting; the arrangement method of the structure connects the installation points evenly and smoothly by using the hollow structure, and the section size of the inner cavity is changed in different positions and different areas because the clearance with other related parts needs to be ensured;
in the special aluminum alloy rear auxiliary frame of the electric SUV, in the structure transition gentle region (adopting the straight front beam 3 and the rear beam 7), the extruded aluminum profile is used for connection, so that the weight is reduced, the integral strength and the rigidity of the auxiliary frame are improved, and the extruded aluminum profile is lower in manufacturing process and die requirements compared with a casting, so that the manufacturing cost of the auxiliary frame is also more favorable.
And S2, completely vibrating sand out of sand cores in the left longitudinal beam 2 and the right longitudinal beam 4 castings through vibration equipment.
And S3, removing unnecessary gates, risers and the like on the left longitudinal beam 2 and the right longitudinal beam 4 castings, and polishing fins.
S4, detecting internal defects of the left longitudinal beam 2 and the right longitudinal beam 4 castings through X-rays; since the left and right longitudinal beams 2, 4 are cast as functional constructions, it is necessary to ensure that the defects inside the structure are within the allowable range, so that the internal defects need to be checked through X-rays;
s5, performing heat treatment on the left longitudinal beam 2 and the right longitudinal beam 4 castings; in the embodiment, the left longitudinal beam 2 and the right longitudinal beam 4 are subjected to heat treatment by adopting T6 (solid solution and aging);
s6, if the surfaces of the left longitudinal beam 2 and the right longitudinal beam 4 have defects or cracks, the strength or the service life is greatly reduced, so that the crack states of the casting surfaces of the left longitudinal beam 2 and the right longitudinal beam 4 are detected by using fluorescence;
s7, cutting the left longitudinal beam 2 and the right longitudinal beam 4 castings, and respectively forming first mounting parts 9, 10 and 11 and second mounting parts 12 and 13 on the left longitudinal beam 2 and the right longitudinal beam 4 castings; namely, the material at the corresponding position of the casting is cut off, and the surface roughness, the dimensional accuracy and the like required by use are achieved. In this way, the first mounting portions 9, 10, 11 and the second mounting portions 12, 13 are obtained integrally with the left side member 2 and the right side member 4, respectively, making the first mounting portions 9, 10, 11 and the second mounting portions 12, 13 more robust and stable.
S8, welding the left longitudinal beam 2 and the right longitudinal beam 4 with the front cross beam 3 and the rear cross beam 7 respectively;
and S9, respectively press-fitting the left front mounting bush 1 and the rear bush 6 of the vehicle body on the left longitudinal beam 2, respectively press-fitting the right front mounting bush 5 of the vehicle body and the rear bush 6 of the vehicle body on the right longitudinal beam 4, and monitoring the press-fitting force and displacement relation in the press-fitting process to ensure that each bush meets the use requirements.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, not to limit it, and not to limit the protection scope of the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (3)
1. The special aluminum alloy rear auxiliary frame for the electric SUV comprises a left front mounting bush (1) of a vehicle body, a left longitudinal beam (2), a front cross beam (3), a right longitudinal beam (4), a right front mounting bush (5) of the vehicle body, a rear bush (6), a rear cross beam (7) and a rear suspension sleeve (8), wherein the left front mounting bush (1) of the vehicle body and the rear bush (6) of the vehicle body are respectively arranged on the left longitudinal beam (2), the right front mounting bush (5) of the vehicle body and the rear bush (6) of the vehicle body are respectively arranged on the right longitudinal beam (4), and the rear suspension sleeve (8) is arranged on the rear cross beam (7), and is characterized in that the left longitudinal beam (2) and the right longitudinal beam (4) are formed by casting, the front cross beam (3) and the rear cross beam (7) are formed by extrusion, and the left longitudinal beam (2), the front cross beam (3), the right longitudinal beam (4) and the rear cross beam (7) are made of aluminum;
the left longitudinal beam (2) and the right longitudinal beam (4) are cut to form first mounting parts (9, 10, 11) for mounting the multi-link suspension;
the left longitudinal beam (2) and the right longitudinal beam (4) are cut to form second mounting parts (12, 13) for mounting adjusting rods;
one end of the left longitudinal beam (2) is welded with one end of the front cross beam (3), one end of the right longitudinal beam (4) is welded with the other end of the front cross beam (3), the other end of the left longitudinal beam (2) is welded with one end of the rear cross beam (7), and the other end of the right longitudinal beam (4) is welded with the other end of the rear cross beam (7).
2. The aluminum alloy rear subframe for an electric SUV according to claim 1, wherein the front cross member (3) and the rear cross member (7) are flat, and the wall thickness of the front cross member (3) and the rear cross member (7) is 3-4mm.
3. The special aluminum alloy rear subframe for an electric SUV according to claim 1, wherein the left longitudinal beam (2) and the right longitudinal beam (4) are both hollow structures.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220728335.5U CN217672827U (en) | 2022-03-31 | 2022-03-31 | Special aluminum alloy rear auxiliary frame for electric SUV |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220728335.5U CN217672827U (en) | 2022-03-31 | 2022-03-31 | Special aluminum alloy rear auxiliary frame for electric SUV |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114655310A (en) * | 2022-03-31 | 2022-06-24 | 四川建安工业有限责任公司 | Special aluminum alloy rear auxiliary frame for electric SUV |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114655310A (en) * | 2022-03-31 | 2022-06-24 | 四川建安工业有限责任公司 | Special aluminum alloy rear auxiliary frame for electric SUV |
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