CN219635314U - New energy automobile sub vehicle frame and car - Google Patents

Abstract

The utility model provides a new energy automobile auxiliary frame and an automobile, comprising: the two end arms on the right side of the first component are respectively cast with one ends of the third component and the fourth component; the two end arms on the left side of the second component are respectively cast with the other ends of the third component and the fourth component; the lower surface of the first component and the lower surface of the second component are respectively provided with a sand cleaning through hole; fifth reinforcing ribs are respectively arranged at the front and rear of the upper end of the first component; the upper surfaces of the two front and rear expansion arms which are expanded outwards from the left side of the first assembly are respectively provided with a first reinforcing rib and a second reinforcing rib; sixth reinforcing ribs are arranged on the front and back of the upper end face of the second component; and the front and the back of the upper surface of the right side of the second component are respectively provided with a third reinforcing rib and a fourth reinforcing rib. According to the utility model, the vacuum pressurizing casting technology is adopted at the key connection point position to realize the structures such as the thinning and the reinforcing rib structure, the weight reducing hole and the like, so that the weight of the auxiliary frame is reduced as a whole, and the connection strength and the reliability with peripheral parts are improved.

Description

New energy automobile sub vehicle frame and car

Technical Field

The utility model relates to an auxiliary frame for an automobile, in particular to a new energy automobile auxiliary frame and an automobile.

Background

Along with global energy crisis and environmental problems, some policies and regulations for energy conservation, emission reduction and consumption reduction are continuously introduced in the automobile industry in China, and light weight is one of important means for realizing energy conservation, emission reduction and oil consumption reduction of automobiles, is one of the development trends of automobiles in the future, and has great significance in improving the endurance mileage of new energy automobiles. According to statistics, the weight of the automobile is reduced by 10%, the oil consumption of the traditional automobile is saved by 8% -10%, and the endurance mileage of the new energy automobile is increased by 5.5%. According to the plan of China manufacturing 2025, the weight of the whole automobile in 2025 is reduced by 20% compared with that in 2015 and 35% compared with that in 2030, and the light weight is already an important breakthrough direction for the development of China automobile industry. The automobile light weight approach comprises structural topology optimization, high-performance light materials, advanced manufacturing process and the like, and the adoption of light materials such as aluminum alloy, magnesium alloy, carbon fiber composite materials and the like is an important approach for realizing automobile light weight.

The density of the aluminum alloy is 1/3 of that of steel, and the aluminum alloy has the remarkable advantages of environmental corrosion resistance, excellent processing performance, recycling and the like, is a light material which is most applied to automobiles at present, and is widely applied to parts of systems such as automobile power assemblies, chassis, automobile bodies and the like. The carbon fiber composite material is a composite material formed by combining a carbon fiber reinforcement body with a matrix such as resin, metal, ceramic and the like, has the density of 1.7g/cm < 3 > -2.3g/cm < 3 >, is about 1/4 of steel, has excellent performances such as high specific strength, high specific modulus, fatigue resistance, creep resistance, high temperature resistance, corrosion resistance and the like, and can be divided into a carbon fiber reinforced resin matrix composite material (CFRP), a carbon fiber reinforced carbon matrix composite material (C/C), a carbon fiber reinforced thermosetting resin (TS), a carbon fiber reinforced thermoplastic resin (TP) and the like according to the types of the matrix. Along with the continuous maturity of the carbon fiber composite material manufacturing process, the cost is also continuously reduced, and the carbon fiber composite material is applied to parts such as automobile interior skeletons, decorative plates, leaf springs, transmission shafts and the like at present, and has a huge application prospect in automobiles in the future. According to a lightweight technology development roadmap, technologies such as aluminum alloy, magnesium alloy, carbon fiber composite materials and the like are developed in the future, so that the carbon fiber composite material mixed vehicle body and carbon fiber parts can be widely applied, the aluminum amount for a single vehicle exceeds 250Kg, the carbon fiber composite material accounts for 2% of the vehicle weight in 2025, the aluminum amount for a single vehicle exceeds 350Kg and the carbon fiber composite material accounts for 5% of the vehicle weight in 2030. Along with the accelerated penetration of new energy automobiles in the market, the new energy automobile materials show a development trend from steel, steel-aluminum mixing and all-aluminum to multi-material mixing, and the new energy automobiles are a platform for mixing and applying various materials in the future, so that proper materials can be truly realized to be used in proper places.

The auxiliary frame is a key bearing piece of a new energy automobile chassis system and is equivalent to a connecting buffer body between a chassis suspension and an automobile body, and vibration and noise caused by running of the automobile or engine operation can be relieved by adjusting the rigidity of the auxiliary frame, so that the safety, comfort and operability of running of the automobile are ensured. At present, an automobile auxiliary frame is divided into a steel plate impact welding auxiliary frame and an aluminum alloy casting auxiliary frame according to materials, and the auxiliary frame application principle is generally as follows in consideration of factors such as cost, light weight and the like: the low-end vehicle type adopts a steel plate impact welding auxiliary frame, and the middle-high-end vehicle type adopts an aluminum alloy casting auxiliary frame. The steel plate impact welding auxiliary frame has the advantages of low cost and high strength, but has the defects of larger weight and low dimensional accuracy, and does not accord with the concept of improving the endurance mileage of the new energy automobile. The aluminum alloy casting auxiliary frame comprises a casting/profile welding auxiliary frame and an integral casting auxiliary frame, and compared with the steel plate impact welding auxiliary frame, the weight of the casting/profile welding auxiliary frame can be reduced by 30% -40%, but the welding process of the casting/profile welding auxiliary frame is extremely complex, so that the strength and reliability of a welding seam are reduced, the integral casting auxiliary frame is high in cost, complex in manufacturing process, high in process difficulty and low in yield.

Therefore, under the trend of multi-material mixing application of new energy automobiles in the future, the multi-material mixed auxiliary frame structure is provided, and the design and optimization of structures such as thin walls, reinforcing ribs and lightening holes are adopted, so that the strength and reliability are improved, the manufacturing process is simplified, and the dimensional accuracy is improved on the premise of reducing the process difficulty, so that the technical problem to be solved by the utility model is solved.

Disclosure of Invention

The utility model aims to provide a new energy automobile auxiliary frame, which overcomes the defects pointed out in the prior art and comprises the following specific scheme:

the utility model relates to a new energy automobile auxiliary frame, which comprises:

the first component is in an I-shaped structure, the left opening is large, the right opening is small, the whole is in a hollow casting structure, and two arms at the right end of the first component are respectively cast and formed with one ends of the third component and the fourth component;

the second component is of an I-shaped structure, the left opening is small, the right opening is large, the whole body is of a hollow casting structure, the two arms at the left end of the second component are respectively cast with the other ends of the third component and the fourth component, and the second component, the third component, the fourth component and the first component form a rectangular mounting hole together;

the lower surfaces of the hollow casting structures at the front-back crossing positions of the first component and the second component are respectively provided with a sand cleaning through hole;

the upper surface of the front-rear crossing position of the first component is provided with a first U-shaped connecting position and a second U-shaped connecting position respectively, and the U-shaped inner corners of the first U-shaped connecting position and the second U-shaped connecting position are provided with fifth reinforcing ribs;

the upper surfaces of the two front and rear expansion arms which are expanded outwards from the left side of the first assembly are respectively provided with a first reinforcing rib and a second reinforcing rib;

the upper surface of the front-rear crossing position of the second component is respectively provided with a third U-shaped connecting position and a fourth U-shaped connecting position, and the U-shaped inner corners of the third U-shaped connecting position and the fourth U-shaped connecting position are provided with sixth reinforcing ribs;

the upper surfaces of the two front and rear expansion arms which are expanded outwards from the right side of the second assembly are respectively provided with a third reinforcing rib and a fourth reinforcing rib.

Preferably, the thicknesses of the first reinforcing rib, the second reinforcing rib, the third reinforcing rib, the fourth reinforcing rib, the fifth reinforcing rib and the sixth reinforcing rib are all 6-10mm.

Preferably, the upper surfaces of the rear expansion arms of the first component and the rear expansion arms of the second component are respectively provided with boss reinforcing ribs, and the thickness of the boss reinforcing ribs is 3-5mm.

Preferably, the left side surface of the first component is provided with two left trapezoid arm connecting points, and a seventh reinforcing rib with the thickness of 6-10mm is arranged at the inner corner point of each left trapezoid arm connecting point; the right side of second subassembly is provided with two right trapezoid arm tie points, the inside corner point of right trapezoid arm tie point is provided with the eighth strengthening rib that thickness is 6-10mm.

Preferably, the aperture of the sand cleaning through hole formed in the lower surface of the front-rear crossing position of the first component and the second component is 75-85mm.

Preferably, the wall thickness of the first and second components is 3-4mm.

Preferably, the third component and the fourth component are hollow structures, the cross section of the third component is hexagonal, the wall thickness is 2.5-3.5mm, the cross section of the fourth component is quadrilateral, and the wall thickness is 3-4mm.

Preferably, the first component and the second component are both made of aluminum alloy materials, the yield strength of the first component and the second component is more than or equal to 250MPa, the tensile strength of the first component and the second component is more than or equal to 310MPa, the elongation of the second component is more than or equal to 9%, the third component is made of carbon fiber materials, the fourth component is an extruded aluminum profile, and the yield strength of the fourth component is more than or equal to 290MPa, the tensile strength of the fourth component is more than or equal to 310MPa, and the elongation of the fourth component is more than or equal to 12%.

Preferably, bolt holes for installing a main speed reducer are formed in the upper and lower sides of the third assembly; and the front and the rear of the two sides of the fourth component are penetrated with assembly through holes for installing the main speed reducer.

An automobile comprises an automobile body metal plate, wherein the automobile body metal plate comprises the auxiliary frame of the new energy automobile.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the auxiliary frame realizes the thinning and reinforcing rib structures by adopting a vacuum pressurizing casting process at key connection point positions according to performance requirements of different positions, and designs structures such as weight reducing holes, so that the weight of the auxiliary frame is reduced as a whole, the connection strength and reliability with peripheral parts are improved, various light materials such as aluminum castings, aluminum profiles, carbon fiber composite materials and the like are fully utilized, the whole quality is lightened, meanwhile, the auxiliary frame is combined and connected together in a casting mode, the integrated forming of the auxiliary frame is realized, and compared with the traditional steel plate impact welding auxiliary frame, the auxiliary frame structure has high integration level, greatly simplifies production and manufacturing procedures, and improves dimensional accuracy.

Drawings

FIG. 1 is a schematic diagram of the upper end structure of a subframe of a new energy automobile;

FIG. 2 is a schematic view of the lower end structure of a subframe of the new energy automobile;

in the figure:

1. a first component;

2. a second component;

3. a third component;

4. a fourth component;

5. a mounting hole;

6. sand cleaning through holes;

7. a first U-shaped connection location;

8. a second U-shaped connection location;

9. a third U-shaped connection site;

10. a fourth U-shaped connection location;

11. a left trapezoid arm connection point;

12. a right trapezoid arm connection point;

1a, a first reinforcing rib;

1b, second reinforcing ribs;

1c, a third reinforcing rib;

1d, fourth reinforcing ribs;

1e, a fifth reinforcing rib;

1f, sixth reinforcing ribs;

2a, seventh reinforcing ribs;

2b, eighth reinforcing ribs;

2c, boss reinforcing ribs;

13. bolt holes;

14. and (5) assembling the through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail below with reference to fig. 1-2, and it should be apparent that the described embodiments are only some, but not all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present utility model, these descriptions should not be limited to these terms. These terms are only used to distinguish one from another. For example, a first may also be referred to as a second, and similarly, a second may also be referred to as a first, without departing from the scope of embodiments of the utility model.

A new energy automobile subframe, comprising:

the first component 1 is I-shaped, the left opening is large, the right opening is small, the whole is of a hollow casting structure, and two end arms on the right side of the first component 1 are respectively cast and molded with one ends of the third component 3 and the fourth component 4;

the second component 2 is I-shaped, the left opening is small, the right opening is large, the whole is in a hollow casting structure, two end arms at the left side of the second component 2 are respectively cast and formed with the other ends of the third component 3 and the fourth component 4, and the second component 2, the third component 3, the fourth component 4 and the first component 1 jointly form a rectangular mounting hole 5;

the wall thickness of the first component 1 and the second component 2 is 3-4mm;

the third component 3 and the fourth component 4 are hollow structures, the cross section of the third component 3 is hexagonal, the wall thickness is 2.5-3.5mm, the cross section of the fourth component 4 is quadrilateral, and the wall thickness is 3-4mm;

the lower surfaces of the front-back crossing positions of the first component 1 and the second component 2 are respectively provided with a sand cleaning through hole 6 capable of reducing the weight of the first component 1 and the second component 2, and the aperture of the sand cleaning through hole 6 is 75-85mm, preferably 80mm.

The upper surface of the front-back crossing position of the first component 1 is respectively provided with a first U-shaped connecting position 7 and a second U-shaped connecting position 8, and the U-shaped inner corners of the first U-shaped connecting position 7 and the second U-shaped connecting position 8 are provided with fifth reinforcing ribs 1e;

the upper surfaces of two front and rear expansion arms which are expanded outwards at the left side of the first component 1 are respectively provided with a first reinforcing rib 1a and a second reinforcing rib 1b;

the upper surfaces of the front-back crossing positions of the second component 2 are respectively provided with a third U-shaped connecting position 9 and a fourth U-shaped connecting position 10, and the U-shaped inner corners of the third U-shaped connecting position 9 and the fourth U-shaped connecting position 10 are provided with sixth reinforcing ribs 1f;

the upper surfaces of the two front and rear expansion arms which are expanded outwards on the right side of the second component 2 are respectively provided with a third reinforcing rib 1c and a fourth reinforcing rib 1d.

The thicknesses of the first reinforcing rib 1a, the second reinforcing rib 1b, the third reinforcing rib 1c, the fourth reinforcing rib 1d, the fifth reinforcing rib 1e and the sixth reinforcing rib 1f are all 6-10mm, and the design has the advantage that the connection strength and reliability of the auxiliary frame, the vehicle body and the chassis peripheral parts can be improved.

According to the auxiliary frame, the vacuum pressurizing casting technology is adopted at the key connection point position to realize the thinning and reinforcing rib structure, the weight reducing holes and other structures are designed, so that the weight of the auxiliary frame is reduced as a whole, the connection strength and reliability with peripheral parts are improved, and the auxiliary frame is integrally combined and connected together in a casting mode to realize the integrated forming of the auxiliary frame.

It should be explained that the first U-shaped connection position 7, the second U-shaped connection position 8, the third U-shaped connection position 9, and the fourth U-shaped connection position 10 are respectively used for connecting an upper left control arm, a lower left control arm, an upper right control arm, and a lower right control arm.

Further, the first component 1 and the second component 2 are both Al-Si-Mg series cast aluminum alloy, the yield strength of the first component 1 and the second component 2 are both more than or equal to 250MPa, the tensile strength of the first component 1 and the second component 2 are both more than or equal to 310MPa, the elongation of the second component is more than or equal to 9%, the third component 3 is made of a carbon fiber composite material consisting of 30% of reinforced carbon fiber, 55% of resin matrix and 15% of additive, the third component 3 is molded by compression under the pressure of 1000T-1500T, the fourth component 4 is 6082 extruded aluminum profile, and the yield strength of the fourth component 4 is more than or equal to 290MPa, the tensile strength of the fourth component 4 is more than or equal to 310MPa, and the elongation of the third component is more than or equal to 12%.

It should be further explained that, the third component 3 and the fourth component 4 are placed as prefabricated components in a metal mold casting mold, and integrated casting molding with the first component 1 and the second component 2 is achieved by adopting a vacuum pressurizing casting process, wherein the casting temperature of the vacuum pressurizing casting process is 670-720 ℃, the pressurizing pressure is 0.3-0.8MPa, the vacuum degree is 5-10kPa, the liquid lifting speed is 85-120mm/s, and the mold filling speed is 50-100mm/s.

The integrated forming method has the advantages that integrated forming of the multi-material mixed auxiliary frame structure of the aluminum casting, the aluminum profile, the carbon fiber composite material and the like is realized, the weight is reduced by 50% -60% compared with that of the steel plate impact welding auxiliary frame, the production and manufacturing procedures are greatly simplified, the dimensional accuracy is improved, meanwhile, the welding strength and reliability of the existing casting/profile welding auxiliary frame are low through the combined connection of two prefabricated components and casting modes of other castings, and the technical problems that the whole casting process of the large-size aluminum alloy auxiliary frame is high in difficulty, low in yield and the like are solved.

Further, the upper surfaces of the rear expansion arms of the first component 1 and the rear expansion part wall of the second component 2 are respectively provided with a boss reinforcing rib 2c, and the thickness of the boss reinforcing rib 2c is 3-5mm.

Further, two bolt holes are formed in the upper surface of the boss reinforcing rib 2c and used for connecting and fixing the transverse stabilizer bar.

Further, two left trapezoid arm connecting points 11 are arranged in the middle and the rear of the left side face of the first component 1, and seventh reinforcing ribs 2a with the thickness of 6-10mm are arranged at the inner corner points of the left trapezoid arm connecting points 11; two right trapezoid arm connecting points 12 are arranged in the middle and at the rear of the right side face of the second component 2, and eighth reinforcing ribs 2b with the thickness of 6-10mm are arranged at the inner corner points of the right trapezoid arm connecting points 12.

Further, bolt holes 13 for installing a main speed reducer are formed in the upper and lower sides of the third component 3; the four subassembly both sides, run through in front and back has the assembly through-hole 14 that can install the main reducer, and the benefit of this kind of design is, can promote the assembly precision of main reducer, has also further alleviateed the whole weight of sub vehicle frame.

According to the utility model, various light materials such as aluminum castings, aluminum profiles, carbon fiber composite materials and the like are fully utilized, a vacuum pressurizing casting process is adopted at key connection point positions to realize a thinned structure, a reinforcing rib structure, a lightening hole and other structures, the weight of the auxiliary frame is integrally reduced, the connection strength and reliability of the auxiliary frame and peripheral parts are improved, and secondly, the auxiliary frame is combined and connected together in a casting mode to realize the integrated forming of the auxiliary frame.

The utility model also provides an automobile using the embodiment, which comprises an automobile body metal plate, wherein the automobile body metal plate comprises the auxiliary frame of the new energy automobile.

Exemplary embodiments according to the present utility model will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

Claims (10)

1. The utility model provides a new energy automobile sub vehicle frame which characterized in that includes:

the first component (1) is of an I-shaped structure, the left opening is large, the right opening is small, the whole is of a hollow casting structure, and two arms at the right side of the first component (1) are respectively cast and molded with one ends of the third component (3) and the fourth component (4);

the second component (2) is of an I-shaped structure, the left opening is small, the right opening is large, the whole hollow casting structure is adopted, the two arms at the left side of the second component (2) are respectively cast and formed with the other ends of the third component (3) and the fourth component (4), and the first component (1), the second component (2), the third component (3) and the fourth component (4) jointly form a rectangular mounting hole (5);

sand cleaning through holes (6) are respectively formed in the lower surfaces of the hollow casting structures at the front-back crossing positions of the first component (1) and the second component (2);

the upper surface of the front-back crossing position of the first component (1) is respectively provided with a first U-shaped connecting position (7) and a second U-shaped connecting position (8), and the U-shaped inner corners of the first U-shaped connecting position (7) and the second U-shaped connecting position (8) are provided with fifth reinforcing ribs (1 e);

the upper surfaces of two front and rear expansion arms which are expanded outwards at the left side of the first assembly (1) are respectively provided with a first reinforcing rib (1 a) and a second reinforcing rib (1 b);

the upper surface of the front-back crossing position of the second component (2) is respectively provided with a third U-shaped connecting position (9) and a fourth U-shaped connecting position (10), and the U-shaped inner corners of the third U-shaped connecting position (9) and the fourth U-shaped connecting position (10) are provided with sixth reinforcing ribs (1 f);

the upper surfaces of the two front and rear expansion arms which are expanded outwards on the right side of the second component (2) are respectively provided with a third reinforcing rib (1 c) and a fourth reinforcing rib (1 d).

2. The auxiliary frame for the new energy automobile according to claim 1, wherein the thicknesses of the first reinforcing rib (1 a), the second reinforcing rib (1 b), the third reinforcing rib (1 c), the fourth reinforcing rib (1 d), the fifth reinforcing rib (1 e) and the sixth reinforcing rib (1 f) are all 6-10mm.

3. The auxiliary frame of the new energy automobile according to claim 1, wherein boss reinforcing ribs (2 c) are arranged on the upper surfaces of the rear expansion arm of the first component (1) and the rear expansion arm of the second component (2), and the thickness of the boss reinforcing ribs (2 c) is 3-5mm.

4. The auxiliary frame of the new energy automobile according to claim 1, characterized in that the left side surface of the first component (1) is provided with two left trapezoid arm connecting points (11), and the inner corner points of the left trapezoid arm connecting points (11) are provided with seventh reinforcing ribs (2 a) with the thickness of 6-10 mm; the right side of second subassembly (2) is provided with two right trapezoid arm tie points (12), the inside corner point of right trapezoid arm tie point (12) is provided with eighth strengthening rib (2 b) that thickness is 6-10mm.

5. The auxiliary frame of the new energy automobile according to claim 1, wherein the aperture of the sand cleaning through hole (6) formed on the lower surface of the front-rear crossing position of the first component (1) and the second component (2) is 75-85mm.

6. The auxiliary frame of a new energy vehicle according to claim 1, characterized in that the wall thickness of the first component (1) and the second component (2) is 3-4mm.

7. The auxiliary frame of the new energy automobile according to claim 1, wherein the third component (3) and the fourth component (4) are hollow structures, the cross section of the third component (3) is hexagonal, the wall thickness is 2.5-3.5mm, the cross section of the fourth component (4) is quadrilateral, and the wall thickness is 3-4mm.

8. The auxiliary frame of the new energy automobile according to claim 1, wherein the first component (1) and the second component (2) are made of aluminum alloy, the yield strength of the first component (1) and the second component (2) is equal to or more than 250MPa, the tensile strength of the first component (1) and the second component (2) is equal to or more than 310MPa, the elongation of the second component is equal to or more than 9%, the third component (3) is made of carbon fiber materials, the fourth component (4) is made of aluminum profiles, and the yield strength of the fourth component (4) is equal to or more than 290MPa, the tensile strength of the fourth component (4) is equal to or more than 310MPa, and the elongation of the fourth component is equal to or more than 12%.

9. The auxiliary frame of the new energy automobile according to claim 1, wherein bolt holes (13) for installing a main reducer are formed in the upper and lower sides of the third component (3); and the front and rear sides of the fourth component (4) are penetrated with assembly through holes (14) for mounting the main speed reducer.

10. An automobile comprising a body panel comprising the new energy automobile subframe of any one of claims 1-9.