This application claims the benefit of China Patent Application No. 202210633680.5 filed Jun. 6, 2022, the entire contents of which are incorporated herein by reference in its entirety.
The disclosure relates to the technical field of vehicle body structures, and in particular, to a vehicle and a vehicle body front engine compartment framework thereof.
An electric vehicle among vehicles is provided with a traction battery as a power source, and the traction battery is usually arranged on a vehicle body floor of the vehicle. For a vehicle body structure of the electric vehicle, for example, a front longitudinal beam rear section casting structure for a vehicle, and specifically discloses the following content:
It can be seen that the front longitudinal beam rear section casting structure in this document comprises a plurality of structures, and thus necessarily comprises connections between different components, and such a structure increases difficulties in manufacturing matching of components themselves and in matching between different components. Moreover, since different components are connected, there is a problem of decrease of collision energy efficiency when a plurality of components having a connection relationship transmit collision energy on a path from the front longitudinal beam to a rocker panel of the vehicle.
Accordingly, there is a need for a new technical solution to solve the problem described above.
The disclosure is proposed in order to solve the technical problem described above at least to some extent.
In view of this, in a first aspect of the disclosure, a front longitudinal beam rear section member of a vehicle is provided. The front longitudinal beam rear section member comprises a base part, and a first part and a second part which are located on two sides of the base part in a width direction of the vehicle, the vehicle is provided with a traction battery, and the traction battery is at least connected to the base part; the vehicle comprises a cross beam located behind the front longitudinal beam rear section member in a length direction of the vehicle, and the base part is connected to the cross beam; and the vehicle comprises two rocker panels separately arranged in the width direction of the vehicle, and each of the first part and the second part is connected to the rocker panel on a corresponding side, wherein at least some of the base part, the first part and the second part are of an integrally-formed structure.
With such a configuration, difficulties in the manufacture of different parts themselves and in matching between parts are reduced, and the product consistency is improved. Moreover, since at least some parts involve an integrated forming process, connection processes such as bolts and gluing introduced for connections between components in a non-integrated forming process are omitted, and the production efficiency is improved while the device investment is reduced.
It can be understood that those skilled in the art can integrally form some or all of the structures according to actual needs. As an example, viewed in a height direction (a Z direction) of the vehicle, the front longitudinal beam rear section member comprises two parts vertically separately arranged; and in the width direction of the vehicle (viewed in a Y direction), the base part, the first part and the second part included in each of the parts are of an integrally-formed structure. That is, each of the base part, the first part and the second part comprises two members, an upper group (3 members) of the members is of an integrated structure, a lower group (3 members) of the members is of an integrated structure, and the two groups of members are connected to each other.
It can be understood that those skilled in the art can integrally form some or all of the structures according to actual needs. As an example, viewed in the height direction (the Z direction) of the vehicle, the front longitudinal beam rear section member comprises two parts vertically separately arranged; and in the width direction of the vehicle (viewed in the Y direction), the base part, the first part and the second part included in each of the parts are of an integrally-formed structure. That is, each of the base part, the first part and the second part comprises two members, an upper group (3 members) of the members is of an integrated structure, and the two groups of members are connected to each other.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, the base part, the first part and the second part are all castings.
With such a configuration, difficulties in the manufacture of different components (for example, one of which is a casting and another of which is an aluminum extruded part) themselves and in matching therebetween are reduced, and the product consistency is improved.
Still taking an example in which the front longitudinal beam rear section member comprises two groups of members vertically separately arranged as describe above, for example, each group of members is an integrally-formed casting, and the two groups of members are connected to each other.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, the casting is made of C611 aluminum alloy free from heat treatment.
The strength of an aluminum alloy high-pressure casting can be improved after heat treatment. However, in the disclosure, the C611 aluminum alloy material free from heat treatment is used to design the front longitudinal beam rear section member with an integrated structure, which is very rare in the industry. In principle, the strength of C611 aluminum alloy free from heat treatment is obviously lower than that of heat-treated AlSi10MgMn aluminum alloy. However, in the disclosure, designing separate structures as an integrally-formed structure combined with a rib position design, a structure, a connection relationship, etc., mentioned below, enables an expected structural strength and a collision safety goal while the strength is reduced in theory. That is, a low-strength material is used to obtain a structure whose structural strength and collision safety goal meet the standard.
Candidate materials to be verified also includes SF 37, HB-1, etc.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, the base part, the first part and the second part are integrally formed.
With such a configuration, a preferred structural form of the front longitudinal beam rear section member is given.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, the front longitudinal beam rear section member is provided with a rib assembly on a side thereof close to the cross beam.
With such a configuration, a specific structural form of the front longitudinal beam rear section member is provided.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, the method further comprises: the rib assembly comprises first ribs extending generally in the width direction of the vehicle.
With such a configuration, a structural form of the rib assembly is provided.
Taking an example in which the front longitudinal beam rear section member is an integrally-formed casting, the provision of the first ribs can increase lateral stiffness of the front longitudinal beam rear section member, thereby effectively preventing the casting from fracturing during a vehicle collision. Moreover, such a rib orientation can ensure that energy can be effectively transmitted to the rocker panels on the two sides in the case of a vehicle collision.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, the rib assembly comprises second ribs forming an included angle with the first ribs, and viewed in the height direction of the vehicle, the second ribs that correspond to the same width direction are continuously or discontinuously arranged; and/or viewed in the height direction of the vehicle, an included angle is formed between at least some of the plurality of second ribs that correspond to the same width direction.
With such a configuration, a structural form of the rib assembly is provided.
Still taking an example in which the front longitudinal beam rear section member is an integrally-formed casting, the provision of the second ribs increases the ability of the front longitudinal beam rear section member to resist torsional deformation in the Z direction when the front longitudinal beam rear section member is impacted due to the vehicle collision. Experiments prove that, especially in a 25% small overlap crash test, such an arrangement can obviously resist the impact of a wheel hub.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, the base part is connected to the cross beam by means of a plurality of connecting parts arranged in the length direction of the vehicle.
With such a configuration, a specific connection mode between the front longitudinal beam rear section member and the cross beam of the vehicle is provided.
Since the traction battery is arranged below a vehicle bottom plate, the height of a connecting component in the Z direction of the vehicle is limited, and the overall cross-sectional strength of the connecting component is weakened. In view of this, in the disclosure, a plurality of connecting components are used to support the force transmission.
It can be understood that those skilled in the art can determine the structural form and number of connecting parts and a connection relationship between each connecting part and the cross beam according to the actual needs. As an example, the structure of the connecting part is generally a sled board, and three sled boards are provided.
For the above front longitudinal beam rear section member of a vehicle, in a possible implementation, at least some of the plurality of connecting parts have different dimensions in the width direction of the vehicle.
With such a configuration, a specific association mode of the plurality of connecting parts is provided.
Still taking an example in which the structure of the connecting component is generally a sled board and three sled boards are provided as described above, for example, the sled board in the middle has a width greater than that of each of the sled boards on two sides. In addition, the material of the sled board, the thickness of the material and the dimension of the outline of the sled board in the height direction of the vehicle may be also adjusted, for example, the material may be selected as aluminum or thermoformed steel, etc. according to the requirements of collision force transmission.
In a second aspect of the disclosure, a vehicle is provided, the vehicle comprising a front longitudinal beam rear section member according to any one of the foregoing implementations.
It can be understood that the vehicle has all the technical effects of a front longitudinal beam rear section member of a vehicle according to any one of the foregoing implementations, which will not be described in detail herein again.
A front longitudinal beam rear section member of a vehicle according to the disclosure is described below with reference to the accompanying drawings. In the accompanying drawings:
Preferred implementations of the disclosure are described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementations are only used to explain the technical principles of the disclosure, and are not intended to limit the scope of protection of the disclosure.
It should be noted that in the description of the disclosure, the terms, such as “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner” and “outer”, that indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limitation to the disclosure. In addition, the terms “first”, “second”, and “third” are for descriptive purposes only, and may not be interpreted as indicating or implying relative importance. The terms “a/an” and “this” in the singular form may also include the plural form.
In addition, for better description of the disclosure, many details are provided in the following specific implementations, and those skilled in the art should understand that, without some specific details, the disclosure can still be implemented. In some examples, casting processing methods, etc. that are well known to those skilled in the art are not described in detail in order to highlight the gist of the disclosure.
Referring to
Referring mainly to
For the front longitudinal beam rear section member 2, since difficulties in the manufacture of different parts and in matching between parts are reduced, the product consistency is improved. Moreover, since at least some parts involve an integrated forming process, connection processes such as bolts and gluing introduced for connections between components in a non-integrated forming process are omitted, and therefore, the production efficiency is improved while the device investment is reduced.
In a possible implementation, rib assemblies are arranged on two sides of the front longitudinal beam rear section member, wherein the rib assembly comprise first ribs 231 extending generally in a width direction of the vehicle (the first ribs extending generally horizontally) and second ribs 232 forming an included angle with the first ribs. For example, each of the first rib and the second rib may comprise a plurality of sections. Especially for the second ribs in the rib assembly, viewed in a height direction of the vehicle, the second ribs of different sections that correspond to the same width direction may be continuously or discontinuously arranged and/or an included angle is formed between at least some of the plurality of second ribs that correspond to the same width direction.
It should be noted that the formation of the included angle herein should be interpreted as that the plurality of second ribs have an obvious direction change in an extension trend. For example, it may be the following case: a straight line in one direction changes to a straight line in another direction; a straight line changes to a curve; a curve of a trend changes to a curve in another direction; and so on.
The provision of the first ribs 231 can increase lateral stiffness of the front longitudinal beam rear section member 2, thereby effectively preventing the casting from fracturing during a vehicle collision. Moreover, such a rib orientation can ensure that energy can be effectively transmitted to the rocker panels on the two sides in the case of a vehicle collision. The provision of the second ribs 232 increases the ability of the front longitudinal beam rear section member 2 to resist torsional deformation in a Z direction when the front longitudinal beam rear section member is impacted due to the vehicle collision.
On this premise, those skilled in the art can combine the integrally-formed front longitudinal beam rear section member of C611 aluminum alloy free from heat treatment with the rib position design including the first ribs and the second ribs, so that the vehicle body front engine compartment framework can meet the expected structural strength and a collision safety goal.
Since the vehicle is further provided with a traction battery (not shown) as its power source, the traction battery is arranged on a base unit at a position close to a lower part, the base part is connected to the cross beam by means of a connecting unit located above the base unit. Since the traction battery is arranged below a vehicle bottom plate, the height of a connecting component in the Z direction of the vehicle is limited, and the overall cross-sectional strength of the connecting component is weakened. In view of this, in the disclosure, reliably support for force transmission is implemented by means of a plurality of separately arranged connecting components.
Referring mainly to
As an example, the second connecting component 42 and the third connecting component 43 are respectively located on two sides of the first connecting component 41, the widths of the connecting components (42, 43) are slightly less than the width of the first connecting component 41, and the structures of the three connecting components are generally the same. Specifically, each of the connecting components (41, 42, 43) is generally of a sled board structure. Taking the first connecting component 41 as an example, the sled board comprises a central recess 410, and a first protrusion 411 and a second protrusion 412 which extend outward from the recess. In addition, the three connecting components may be made of the same material or different materials. For example, in this example, the first connecting component 41 in the middle is an aluminum stamped part, and the connecting components (42, 43) on the two sides are made of DP800 high-strength steel.
In a possible implementation, on one hand, the first part/second part of the front longitudinal beam rear section member 2 is connected to the rocker panel on a corresponding side in the width direction of the vehicle, and on the other hand, the first part/second part of the front longitudinal beam rear section member 2 is connected to the rocker panel on a corresponding side in a length direction of the vehicle. Hereinafter, description will be made mainly with reference to
As an example, the vehicle is provided with a bracket 5 for connection. For example, the bracket is an aluminum extruded part. The bracket has two protruding ends. According to a direction shown in
In this example, a foot plate 6 of the vehicle is connected to the first part of the front longitudinal beam rear section member 2 in the height direction of the vehicle by means of two connectors d 61, the foot plate 6 is also connected to the rocker panel 8(a) in the height direction of the vehicle by means of a connector e 62, and the rocker panel 8(a) is connected to the first part of the front longitudinal beam rear section member 2 in the width direction of the vehicle by means of a connector f 63.
In addition, the first part/second part of the front longitudinal beam rear section member 2 is connected to the lower inner A-pillar plate on a corresponding side by means of a connector g 71, and the first part/second part of the front longitudinal beam rear section member 2 is also directly connected to the rocker panel on a corresponding side by means of a connector h 81 and a connector i 82. In addition, in this example, the lower inner A-pillar plate is made of high-strength steel DP600.
Referring mainly to
Based on the above structure, for a force transmission path in the case of a vehicle collision, reference may be made to
It can be seen that, when the front longitudinal beam rear section member is subjected to a direct impact, the energy in areas on two sides is transmitted mainly by means of the rocker panel on a corresponding side, and the energy in a central area is transmitted to the cross beam by means of the three sled boards, so that requirements for small overlap crash at 56 km/h FFB, 64 km/h ODB, 25% 64 km/h, etc. can be met. According to the disclosure, based on the structural design of the new front longitudinal beam rear section member, a force transmission path after a vehicle collision is re-planned, so that the structure is more stable, and the energy transmission efficiency after the collision is higher. Experiments prove that, especially in a 25% small overlap crash test, the vehicle body front engine compartment framework provided with the front longitudinal beam rear section member according to the disclosure can obviously resist the impact of a wheel hub.
Heretofore, the technical solutions of the disclosure have been described with reference to the preferred implementations shown in the accompanying drawings. However, those skilled in the art can readily understand that the scope of protection of the disclosure is apparently not limited to these specific implementations. Those skilled in the art may make equivalent changes or substitutions to the related technical features without departing from the principle of the disclosure, and all the technical solutions with such changes or substitutions shall fall within the scope of protection of the disclosure.
Number | Date | Country | Kind |
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202210633680.5 | Jun 2022 | CN | national |