CN215663650U - Rear auxiliary frame structure - Google Patents
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- CN215663650U CN215663650U CN202120532732.0U CN202120532732U CN215663650U CN 215663650 U CN215663650 U CN 215663650U CN 202120532732 U CN202120532732 U CN 202120532732U CN 215663650 U CN215663650 U CN 215663650U
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Abstract
The utility model relates to a rear auxiliary frame structure. The rear auxiliary frame comprises a left longitudinal beam, a right longitudinal beam, a front cross beam and a rear cross beam; two ends of the front cross beam are respectively welded with the left longitudinal beam and the right longitudinal beam; two ends of the rear cross beam are respectively welded with the left longitudinal beam and the right longitudinal beam; the rear auxiliary frame structure formed by the left longitudinal beam, the right longitudinal beam, the front cross beam and the rear cross beam is in a shape like a Chinese character 'kou'; the left longitudinal beam and the right longitudinal beam are provided with a first connecting structure and a second connecting structure which are connected with the rear upper control arm; the first and second connecting structures adopt a double-layer lug structure and form an included angle of 30 degrees with the horizontal direction; third and fourth connecting structures connected with the rear lower control arm are arranged on the left longitudinal beam and the right longitudinal beam; the third and fourth connecting structures are vertical to the horizontal direction; fifth and sixth connecting structures connected with the toe-in control arm are arranged on the left and right longitudinal beams; the fifth connecting structure and the sixth connecting structure form an included angle of 30 degrees with the horizontal direction; this back frame construction high strength, high rigidity, lightweight can satisfy the installation and the functional requirement of rear suspension system, applicable in the installation demand of multiple wheel tread.
Description
Technical Field
The utility model relates to the technical field of automobiles, in particular to a rear auxiliary frame structure.
Background
The design of sub vehicle frame is the key in automobile suspension spare part research and development field, and back sub vehicle frame is responsible for connecting key spare parts of car such as automobile body, power assembly, stabilizer bar, control arm as the important component of suspension system, and the hollow cast aluminium of a kind and aluminium alloy welded back sub vehicle frame can adapt to the installation demand of multiple wheel base, satisfies the demand of sub vehicle frame universalization design. At present, the auxiliary frame of the passenger car generally adopts the following production and processing schemes: (1) stamping, internal high-pressure and bending steel plates or pipes to form a tailor-welded structure; (2) a hollow or solid aluminum alloy integral casting structure; (3) the aluminum alloy casting, the extruded section and the stamped plate are in a splicing welding structure; the scheme (1) is a mainstream structure, the cost is moderate, but the weight is generally higher, and the requirement of light weight of the chassis is not facilitated; the schemes (2) and (3) can achieve a good lightweight effect, are mostly adopted by high-end vehicle types, but have higher cost; the structure of the part in the scheme (2) is greatly influenced by the production process, and if the structural design is unreasonable, casting defects are easily generated; scheme (3) are a plurality of component parts with sub vehicle frame structure split, have reduced the manufacturing degree of difficulty of each subassembly, but the welding quality control degree of difficulty is higher.
Disclosure of Invention
The utility model provides a rear auxiliary frame structure with a simple structure, which has high strength, high rigidity and light weight, can meet the installation and function requirements of a rear suspension system, can be suitable for the installation requirements of various wheel distances, meets the development trend of auxiliary frame universal design, and solves the problems of the conventional auxiliary frame structure.
The technical scheme of the utility model is described as follows by combining the attached drawings:
a rear subframe structure, the rear subframe 1 includes a left longitudinal beam 7a, a right longitudinal beam 7b, a front cross beam 8a, a rear cross beam 8 b; two ends of the front cross beam 8a are respectively welded with the left longitudinal beam 7a and the right longitudinal beam 7 b; two ends of the rear cross beam 8b are respectively welded with the left longitudinal beam 7a and the right longitudinal beam 7 b; the rear auxiliary frame structure formed by the left longitudinal beam 7a, the right longitudinal beam 7b, the front cross beam 8a and the rear cross beam 8b is in a shape like a Chinese character 'kou'; the left longitudinal beam 7a is provided with a first connecting structure 10a connected with the rear upper control arm 2; a second connecting structure 10b connected with the rear upper control arm 2 is arranged on the right longitudinal beam 7 b; the first connecting structure 10a and the second connecting structure 10b adopt a double-layer lug structure and form an included angle of 30 degrees with the horizontal direction; a third connecting structure 11a connected with the rear lower control arm 3 is arranged on the left longitudinal beam 7 a; a fourth connecting structure 11b connected with the rear lower control arm 3 is arranged on the right longitudinal beam 7 b; the third connecting structure 11a and the fourth connecting structure 11b are vertical to the horizontal direction; a fifth connecting structure 12a connected with the toe-in control arm 4 is arranged on the left longitudinal beam 7 a; a sixth connecting structure 12b connected with the toe-in control arm 4 is arranged on the right longitudinal beam 7 b; the fifth connecting structure 12a and the sixth connecting structure 12b form an included angle of 30 degrees with the horizontal direction; and a seventh connecting structure 13a and an eighth connecting structure 13b connected with the rear stabilizer bar system 6 are arranged at the bottom parts of the left longitudinal beam 7a and the right longitudinal beam 7 b.
The first connecting structure 10a, the second connecting structure 10b, the third connecting structure 11a, the fourth connecting structure 11b, the fifth connecting structure 12a and the sixth connecting structure 12b are all double-layer lug structures.
The third connecting structure 11a and the fourth connecting structure 11b are both provided with oblong holes 19; and the fifth connecting structure 12a and the sixth connecting structure 12b are provided with through holes which are penetrated in the front and back directions.
The lower surface of the left longitudinal beam 7a is provided with a first positioning boss 20a and a first positioning pit 21 a; the lower surface of the right longitudinal beam 7b is provided with a second positioning boss 20b and a second positioning recess 21 b.
Two end points of the left longitudinal beam 7a are provided with a first machining round hole 9a and a third machining round hole 9c for press-fitting the first bushing 5a and the third bushing 5 c; and two end points of the right longitudinal beam 7b are provided with a second machining round hole 9b and a fourth machining round hole 9d for press-fitting the second bushing 5b and the fourth bushing 5 d.
The left longitudinal beam 7a and the right longitudinal beam 7b are of hollow cast aluminum structures.
The front cross beam 8a is of a rectangular section aluminum alloy profile structure with holes on the side surface; the rear cross beam 8b is of a hexagonal section aluminum alloy profile structure with holes in the side faces.
The seventh connecting structure 13a and the eighth connecting structure 13b have a hexagonal shape, and two female screw holes are formed on the upper surface thereof.
The left longitudinal beam 7a and the right longitudinal beam 7b are uniform in wall thickness.
A first weight-reducing and vibration-damping hole 15a and a fourth weight-reducing and vibration-damping hole 15d are formed in the front surface of the left longitudinal beam 7 a; a second weight-reducing sand hole 15b and a third weight-reducing sand hole 15c are formed in the front surface of the right longitudinal beam 7 b; a seventh lightening and shaking sand hole 15g and a sixth lightening and shaking sand hole 15f are formed in the rear surface of the left longitudinal beam 7 a; a fifth weight-reducing and vibrating sand hole 15e and an eighth weight-reducing and vibrating sand hole 15h are formed in the rear surface of the right longitudinal beam 7 b; a ninth lightening and shaking sand hole 16a is formed in the inner surface of the left longitudinal beam 7 a; a tenth lightening and shaking sand hole 16b is formed in the inner surface of the right longitudinal beam 7 b; an eleventh lightening and vibrating sand hole 17a is formed in the outer surface of the left longitudinal beam 7 a; a twelfth weight-reducing and vibrating hole 17b, a thirteenth weight-reducing and vibrating hole 17c, a fourteenth weight-reducing and vibrating hole 17d and a fifteenth weight-reducing and vibrating hole 17e are formed in the outer surface of the right longitudinal beam 7 b; a front beam lightening hole 14a is formed in the front beam 8 a; and a rear cross beam lightening hole 14b is formed in the rear cross beam 8 b.
The utility model has the beneficial effects that:
1) the utility model has simple structure;
2) the first connecting structure 10a and the second connecting structure 10b are of double-layer lug structures forming an included angle of 30 degrees with the horizontal direction, so that interference between the lower control arm and an auxiliary frame in the motion process is effectively avoided, the double-layer structures are beneficial to limiting the clamping rigidity of the lower control arm, and the positioning is more accurate;
3) the third connecting structure 11a and the fourth connecting structure 11b adopt a vertically downward double-layer lug structure, so that enough vertical rigidity can be provided for the installation of the lower control arm, a certain margin is provided for the size design of the lower control arm, and the requirement of chassis four-wheel positioning parameter adjustment is met;
4) the fifth connecting structure 12a and the sixth connecting structure 12b adopt a double-layer lug structure with an included angle of 30 degrees with the horizontal direction, so that interference is avoided, longitudinal displacement of the control arm is limited, and the bracket is provided with a through hole penetrating through the bracket from front to back, so that the reliability of bolt connection is ensured;
5) the mounting planes of the long hexagons of the seventh connecting structure 13a and the eighth connecting structure 13b are provided with two internal threaded holes, so that the positioning requirement of the stabilizer bar is met through bolt connection, and the stabilizer bar system can provide effective torsional rigidity;
6) the first positioning boss 20a, the first positioning pit 21a, the second positioning boss 20b and the second positioning pit 21b limit the freedom degrees in the vertical direction, the transverse direction and the longitudinal direction, and are used for ensuring the accurate installation and positioning of workpieces during mechanical processing;
7) the utility model adopts the aluminum alloy material, which can effectively reduce the weight of the parts;
8) the utility model belongs to a rear suspension system, which is used for the structural arrangement of a lower control arm, a toe-in control arm, an upper control arm, a stabilizer bar system and the like, and can meet the arrangement requirement of a multi-link rear independent suspension system;
9) the utility model adopts a structure of hollow casting and aluminum profile welding, and can effectively solve the problem of difficult realization of the integral hollow casting process;
10) according to the utility model, through reasonable design of the casting structure and the section structure, the dynamic stiffness, the static stiffness and the overall mode of each connecting point of the auxiliary frame are higher, the durability is good, and the requirements of stability performance, NVH performance and reliability of the automobile chassis can be met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the structure of the present invention in cooperation with peripheral components;
FIG. 2 is a schematic view of the structure of the present invention in cooperation with a control arm;
FIG. 3 is a schematic front exploded view of the present invention;
FIG. 4 is a schematic illustration of the reverse explosion of the present invention;
FIG. 5 is a view taken along line A of FIG. 3;
FIG. 6 is a view from the direction B of FIG. 3;
fig. 7 is a view in the direction C of fig. 3.
In the figure: 1. a rear subframe; 2. a rear upper control arm; 3. a lower rear control arm; 4. a toe-in control arm; 5a, a first bushing; 5b, a second bushing; 5c, a third bushing; 5d, a fourth bushing; 6. a rear stabilizer bar system; 7a, a left longitudinal beam; 7b, a right longitudinal beam; 8a, a front cross beam; 8b, a rear cross beam; 9a, machining a circular hole; 9b, second machining a round hole; 9c, machining a round hole in a third machining mode; 9d, machining a round hole in a fourth machining mode; 10a, a first connecting structure; 10b, a second connecting structure; 11a, a third connecting structure; 11b, a fourth connecting structure; 12a, a fifth connecting structure; 12b, a sixth connecting structure; 13a, a seventh connecting structure; 13b, an eighth connecting structure; 14a, front cross beam lightening holes; 14b, a rear cross beam lightening hole; 15a, a first weight-reducing sand hole; 15b, a second weight-reducing sand hole; 15c, a third weight-reducing sand hole; 15d, a fourth weight-reducing sand hole; 15e, a fifth weight-reducing sand-shaking hole; 15f, a sixth weight-reducing sand-vibrating hole; 15g, a seventh lightening and shaking hole; 15h, a seventh lightening and shaking hole; 16a, a ninth weight-reducing sand hole; 16b, a tenth weight-reducing sand hole; 17a, an eleventh weight-reducing sand hole; 17b, a twelfth lightening and shaking hole; 17c, a thirteenth lightening and shaking hole; 17d, a fourteenth weight-reducing sand hole; 17e, a fifteenth weight-reducing sand hole; 19. a long round hole; 20a, a first positioning boss; 20b, a second positioning boss; 21a, a first positioning pit; 21b, second positioning pits.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a rear subframe structure, the rear subframe 1 includes a left longitudinal beam 7a, a right longitudinal beam 7b, a front cross beam 8a, and a rear cross beam 8 b; two ends of the front cross beam 8a are respectively welded with the left longitudinal beam 7a and the right longitudinal beam 7 b; two ends of the rear cross beam 8b are respectively welded with the left longitudinal beam 7a and the right longitudinal beam 7 b; the rear auxiliary frame structure formed by the left longitudinal beam 7a, the right longitudinal beam 7b, the front cross beam 8a and the rear cross beam 8b is in a shape of a Chinese character 'kou'. The rear auxiliary frame 1 is of a closed frame structure, the section of any position of the rear auxiliary frame is of a closed structure, the whole bending and torsion resistance is good, and the first-order mode is more than 150 Hz.
Referring to fig. 1, 3 and 4, a first connecting structure 10a connected with the rear upper control arm 2 is arranged on the left longitudinal beam 7 a; a second connecting structure 10b connected with the rear upper control arm 2 is arranged on the right longitudinal beam 7 b; the first connecting structure 10a and the second connecting structure 10b adopt a double-layer lug structure (three faces are not sealed) and form an included angle of 30 degrees with the horizontal direction, so that interference with an auxiliary frame in the motion process of the lower control arm is effectively avoided, the double-layer structure is favorable for limiting the clamping rigidity of the lower control arm, and the positioning is more accurate.
Referring to fig. 1, 2, 4 and 6, a third connecting structure 11a connected with the rear lower control arm 3 is arranged on the left longitudinal beam 7 a; a fourth connecting structure 11b connected with the rear lower control arm 3 is arranged on the right longitudinal beam 7 b; the third connecting structure 11a and the fourth connecting structure 11b are perpendicular to the horizontal direction, so that enough vertical rigidity can be provided for mounting the lower control arm 3, a certain margin is provided for the size design of the lower control arm 3, and a long circular hole 19 is arranged to meet the requirement of chassis four-wheel positioning parameter adjustment; the third connecting structure 11a and the fourth connecting structure 11b are double-layer lug structures. Third connection structure 11a, fourth connection structure 11b are under back sub vehicle frame 1, and the whole condition of arranging is comparatively regular, does not have the sudden change in the cross-section of structure and height, and the whole atress condition of sub vehicle frame is better to the type trapezium structure that has adopted the hexagonal cross-section has increased the intensity of turning round of sub vehicle frame rear beam, satisfies control arm hookup location 11a, 11 b's intensity demand down.
Referring to fig. 1, 2 and 4, a fifth connecting structure 12a connected with the toe-in control arm 4 is arranged on the left longitudinal beam 7 a; a sixth connecting structure 12b connected with the toe-in control arm 4 is arranged on the right longitudinal beam 7 b; avoid interfering the longitudinal displacement of restriction control arm simultaneously, the through-hole that runs through around the support position is provided, guarantees bolted connection's reliability. The fifth connecting structure 12a and the sixth connecting structure 12b are double-layer lug structures.
Referring to fig. 1 and 2, the toe control arm 4 is closer to the upper control arm 2, and the structural strength of the local position is enhanced by increasing the section size of the subframe longitudinal beam, so that the strength requirements of the upper control arm 2 and the toe control arm 4 on the first connecting structure 10a, the second connecting structure 10b, the fifth connecting structure 12a and the sixth connecting structure 12b are ensured. The length of a cantilever from the rear auxiliary frame 1 to a vehicle body mounting point is reasonably designed, so that the requirement that the Z-direction section is smoothly transited to the minimum size is ensured, but the X-direction section size is ensured to be uniform and unchanged, and the weight reducing effect is achieved, and the requirement on the strength and the rigidity of the connection with the vehicle body is met.
Referring to fig. 1, 3, 4, 5 and 7, the bottom of the left longitudinal beam 7a and the right longitudinal beam 7b are provided with a seventh connecting structure 13a and an eighth connecting structure 13b connected with the rear stabilizer bar system 6, and the mounting plane of the long hexagon is provided with two internal threaded holes, so that the positioning requirement of the stabilizer bar is met through bolt connection, and the stabilizer bar system can provide effective torsional rigidity. The wall thicknesses of cantilever parts of the left longitudinal beam 7a and the right longitudinal beam 7b are uniform, no structures of sudden increase and sudden decrease of the wall thicknesses exist, the wall thicknesses of hollow parts are equivalent, the change transition of the cross sections of the casting is smooth, and the material utilization rate of the casting is improved. The left longitudinal beam 7a and the right longitudinal beam 7b are formed by one-step casting through an upper die, a lower die and a sand core through reasonably setting parting lines, and a first weight-reducing and sand-vibrating hole 15a and a fourth weight-reducing and sand-vibrating hole 15d are formed in the front surface of the left longitudinal beam 7 a; a second weight-reducing sand hole 15b and a third weight-reducing sand hole 15c are formed in the front surface of the right longitudinal beam 7 b; a seventh lightening and shaking sand hole 15g and a sixth lightening and shaking sand hole 15f are formed in the rear surface of the left longitudinal beam 7 a; a fifth weight-reducing and vibrating sand hole 15e and an eighth weight-reducing and vibrating sand hole 15h are formed in the rear surface of the right longitudinal beam 7 b; a ninth lightening and shaking sand hole 16a is formed in the inner surface of the left longitudinal beam 7 a; a tenth lightening and shaking sand hole 16b is formed in the inner surface of the right longitudinal beam 7 b; an eleventh lightening and vibrating sand hole 17a is formed in the outer surface of the left longitudinal beam 7 a; a twelfth weight-reducing and vibrating hole 17b, a thirteenth weight-reducing and vibrating hole 17c, a fourteenth weight-reducing and vibrating hole 17d and a fifteenth weight-reducing and vibrating hole 17e are formed in the outer surface of the right longitudinal beam 7 b; the requirement of sand core support during casting is met, the sand core is guaranteed to be completely cleaned in the casting process, and the flanging reinforcing structure around the sand hole can improve the structural strength to a certain extent. In order to reduce the welding difficulty of the auxiliary frame components, improve the quality of welding seams and reduce defects, the front and rear cross beams adopt closed joint surfaces, the fact that all sections of welding positions have enough welding seam length is guaranteed, the rectangular section is adopted for the joint surface of the front cross beam, the space occupation is reduced, the hexagonal section is adopted for the rear cross beam, the welding matching area can be increased, in addition, the left longitudinal beam 7a, the right longitudinal beam 7b, the front cross beam 8a and the rear cross beam 8b are welded and matched positions, the matching relation among parts is guaranteed through a machining method, and basic conditions are provided for a well-designed welding process.
Referring to fig. 1 and 4, the lower surface of the left longitudinal beam 7a is provided with a first positioning boss 20a and a first positioning recess 21 a; the lower surface of the right longitudinal beam 7b is provided with a second positioning boss 20b and a second positioning pit 21b, so that the freedom degrees in the vertical direction, the transverse direction and the longitudinal direction are limited, and the workpiece is accurately installed and positioned during machining.
Referring to fig. 4, the two end points of the left longitudinal beam 7a are provided with a first machining round hole 9a and a third machining round hole 9c for press-fitting the first bush 5a and the third bush 5 c; and two end points of the right longitudinal beam 7b are provided with a second machining round hole 9b and a fourth machining round hole 9d for press-fitting the second bushing 5b and the fourth bushing 5 d. First machine tooling round hole 9a, second machine tooling round hole 9b, third machine tooling round hole 9c, fourth machine tooling round hole 9d and back sub vehicle frame 1 structure transition smoothness satisfy the requirement of effective support, and it is reasonable to pass the power route, has guaranteed that sub vehicle frame overall structure has better intensity and sound rigidity.
Referring to fig. 3, the left longitudinal beam 7a and the right longitudinal beam 7b are of hollow cast aluminum structures, the forming process adopts a low-pressure casting technology, the wall thickness is uniform, and the shells of the left longitudinal beam 7a and the right longitudinal beam 7b are provided with a plurality of weight-reducing sand-vibrating holes with regular shapes, so that the light weight effect is remarkable, and in addition, the structure is simple, the positioning is accurate, the machining process can be greatly simplified, and the machining cost is reduced.
Referring to fig. 3, the front cross beam 8a is a rectangular section aluminum alloy profile structure with holes on the side surface, the extrusion forming is adopted in the process, the section shape is regular, the welding with the longitudinal beam casting piece is convenient, the welding performance is good, and the design difficulty of the welding process is reduced.
Referring to fig. 3, the rear cross member 8b is a hexagonal aluminum alloy section structure with a hole on the side surface to form a stable structure similar to a trapezoid, the bending rigidity can be improved by increasing the cross-sectional area of the cross member in each direction, and the welding strength between the casting and the section can be improved by increasing the length of the welding line
Referring to fig. 4, a front beam lightening hole 14a is formed in the front beam 8 a; and a rear cross beam lightening hole 14b is formed in the rear cross beam 8 b.
To sum up, structure high strength, high rigidity, lightweight can satisfy the installation and the functional requirement of rear suspension system, and applicable in the installation demand of multiple wheel base satisfies the development trend of sub vehicle frame universalization design.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the scope of the present invention is not limited to the specific details of the above embodiments, and any person skilled in the art can equally and equally replace or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A rear subframe structure is characterized in that a rear subframe (1) comprises a left longitudinal beam (7a), a right longitudinal beam (7b), a front cross beam (8a) and a rear cross beam (8 b); two ends of the front cross beam (8a) are respectively welded with the left longitudinal beam (7a) and the right longitudinal beam (7 b); two ends of the rear cross beam (8b) are respectively welded with the left longitudinal beam (7a) and the right longitudinal beam (7 b); the rear auxiliary frame structure formed by the left longitudinal beam (7a), the right longitudinal beam (7b), the front cross beam (8a) and the rear cross beam (8b) is in a shape of a Chinese character 'kou'; a first connecting structure (10a) connected with the rear upper control arm (2) is arranged on the left longitudinal beam (7 a); a second connecting structure (10b) connected with the rear upper control arm (2) is arranged on the right longitudinal beam (7 b); the first connecting structure (10a) and the second connecting structure (10b) adopt a double-layer lug structure and form an included angle of 30 degrees with the horizontal direction; a third connecting structure (11a) connected with the rear lower control arm (3) is arranged on the left longitudinal beam (7 a); a fourth connecting structure (11b) connected with the rear lower control arm (3) is arranged on the right longitudinal beam (7 b); the third connecting structure (11a) and the fourth connecting structure (11b) are vertical to the horizontal direction; a fifth connecting structure (12a) connected with the toe-in control arm (4) is arranged on the left longitudinal beam (7 a); a sixth connecting structure (12b) connected with the toe-in control arm (4) is arranged on the right longitudinal beam (7 b); the fifth connecting structure (12a) and the sixth connecting structure (12b) form an included angle of 30 degrees with the horizontal direction; and a seventh connecting structure (13a) and an eighth connecting structure (13b) connected with the rear stabilizer bar system (6) are arranged at the bottoms of the left longitudinal beam (7a) and the right longitudinal beam (7 b).
2. A rear sub frame structure according to claim 1, wherein the first (10a), second (10b), third (11a), fourth (11b), fifth (12a) and sixth (12b) connection structures are all double lug structures.
3. A rear sub-frame structure according to claim 2, wherein said third connecting structure (11a) and said fourth connecting structure (11b) are provided with oblong holes (19); and through holes which are penetrated through from front to back are formed in the fifth connecting structure (12a) and the sixth connecting structure (12 b).
4. A rear sub frame structure according to claim 1, wherein a lower surface of said left side member (7a) is provided with a first positioning boss (20a) and a first positioning recess (21 a); and a second positioning boss (20b) and a second positioning concave pit (21b) are arranged on the lower surface of the right longitudinal beam (7 b).
5. A rear sub frame structure according to claim 1, wherein both end points of said left side member (7a) are provided with first and third machining round holes (9a, 9c) for press-fitting first and third bushes (5a, 5 c); and a second machining round hole (9b) and a fourth machining round hole (9d) for press-fitting a second bushing (5b) and a fourth bushing (5d) are formed in two end points of the right longitudinal beam (7 b).
6. A rear sub-frame structure according to claim 1, wherein said left and right side members (7a, 7b) are of hollow cast aluminium construction.
7. A rear sub-frame structure according to claim 1, wherein said front cross-member (8a) is a rectangular section aluminium alloy profile structure with holes in the sides; the rear cross beam (8b) is of a hexagonal section aluminum alloy section structure with holes in the side faces.
8. A rear sub frame structure according to claim 1, wherein said seventh connecting structure (13a) and eighth connecting structure (13b) are hexagonal and have two female screw holes on the upper surface thereof.
9. A rear sub frame structure according to claim 1, wherein said left and right side members (7a, 7b) have a uniform wall thickness.
10. A rear sub frame structure according to claim 1, wherein the front surface of the left side member (7a) is provided with a first vibration reduction hole (15a) and a fourth vibration reduction hole (15 d); a second weight-reducing and vibration-damping hole (15b) and a third weight-reducing and vibration-damping hole (15c) are formed in the front surface of the right longitudinal beam (7 b); a seventh lightening and shaking sand hole (15g) and a sixth lightening and shaking sand hole (15f) are formed in the rear surface of the left longitudinal beam (7 a); a fifth weight-reducing and vibrating sand hole (15e) and an eighth weight-reducing and vibrating sand hole (15h) are formed in the rear surface of the right longitudinal beam (7 b); a ninth weight-reducing and vibrating sand hole (16a) is formed in the inner surface of the left longitudinal beam (7 a); a tenth lightening and shaking sand hole (16b) is formed in the inner surface of the right longitudinal beam (7 b); an eleventh weight-reducing and vibrating sand hole (17a) is formed in the outer surface of the left longitudinal beam (7 a); a twelfth lightening and shaking sand hole (17b), a thirteenth lightening and shaking sand hole (17c), a fourteenth lightening and shaking sand hole (17d) and a fifteenth lightening and shaking sand hole (17e) are formed in the outer surface of the right longitudinal beam (7 b); a front cross beam lightening hole (14a) is formed in the front cross beam (8 a); and a rear cross beam lightening hole (14b) is formed in the rear cross beam (8 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120532732.0U CN215663650U (en) | 2021-03-15 | 2021-03-15 | Rear auxiliary frame structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120532732.0U CN215663650U (en) | 2021-03-15 | 2021-03-15 | Rear auxiliary frame structure |
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| CN215663650U true CN215663650U (en) | 2022-01-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115009362A (en) * | 2022-05-30 | 2022-09-06 | 中国第一汽车股份有限公司 | Aluminum alloy cast-in auxiliary frame for passenger vehicle and manufacturing process thereof |
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2021
- 2021-03-15 CN CN202120532732.0U patent/CN215663650U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115009362A (en) * | 2022-05-30 | 2022-09-06 | 中国第一汽车股份有限公司 | Aluminum alloy cast-in auxiliary frame for passenger vehicle and manufacturing process thereof |
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