Patent Application
20230391405
This application claims the benefit of China Patent Application No. 202210633681.X 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, Chinese utility model patent (CN 213974175 U) discloses a front longitudinal beam rear section casting structure for a vehicle, and specifically discloses the following content:
the front longitudinal beam rear section casting structure comprises a first casting structure 1 and a second casting structure 2, wherein the first casting structure has a relatively large dimension, and the second casting structure has a relatively small dimension; the second casting structure 2 is fixed to one side of the first casting structure 1 by means of a bolt, and a lower inner A-pillar plate 3 is fixed to the other side of the first casting structure 1 by means of a bolt and is rigidly connected to and abuts against the first casting structure 1, so as to transmit collision energy; the lower inner A-pillar plate 3 and a sill longitudinal beam 7 form an integrated structure, and a front longitudinal beam 4 is of a cuboid structure; the first casting structure 1 and the second casting structure 2 are both fixedly connected to the front longitudinal beam 4 by means of bolts; and the first casting structure 1 further comprises a sill longitudinal beam matching portion 16, wherein the sill longitudinal beam matching portion 16 is integrally formed with the first casting structure 1, and is in bolted connection, flow drill screw (FDS) connection or self-piercing riveting (SPR) connection with the sill longitudinal beam 7 and abuts against the sill longitudinal beam, so as to transmit the collision energy from the front longitudinal beam 4 to the sill longitudinal beam 7.
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 the sill longitudinal beam 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 vehicle body front engine compartment framework of a vehicle is provided, the vehicle body front engine compartment framework comprising: two front longitudinal beams; a front longitudinal beam rear section member arranged between two longitudinal front beams; and a cross beam located behind the front longitudinal beam rear section member in a length direction of the vehicle, wherein 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, and the base part is connected to the cross beam; and at least some of the base part, the first part and the second part are of an integrally-formed structure.
With such a configuration, a structural form of the vehicle body front engine compartment framework is provided.
For the front longitudinal beam rear section member, since difficulties in the manufacture of different parts themselves and in matching between components 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 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, and the two groups of members are connected to each other.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, the vehicle is provided with a traction battery, and the traction battery is arranged on the base part at a position close to a lower part in the height direction of the vehicle; the vehicle body front engine compartment framework comprises a connecting unit, the base part is connected to the cross beam by means of the connecting unit; and in an assembled state, the connecting unit is located above the base part in the height direction of the vehicle.
With such a configuration, a specific structural form in which the vehicle body front engine compartment framework is composed of the front longitudinal beam rear section member provided.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, the connecting unit comprises a plurality of connecting components arranged in the length direction of the vehicle, and the base part is connected to the cross beam by means of the plurality of connecting components.
With such a configuration, a structural form of the connecting unit is provided. Since the traction battery is arranged below a vehicle bottom plate, the height of the 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, the 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 vehicle body front engine compartment framework 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 also be adjusted, for example, the material may be selected as aluminum or thermoformed steel, etc. according to the requirements of collision force transmission.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, the vehicle body front engine compartment framework comprises: two rocker panels corresponding to the two front longitudinal beams, wherein on one hand, the first part/second part 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 is connected to the rocker panel on a corresponding side 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 rocker panels on two sides is provided.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, the vehicle body front engine compartment framework comprises a foot plate, wherein on one hand, the foot plate is connected to the rocker panel on a corresponding side in the height direction of the vehicle, and on the other hand, the foot plate is connected to the first part/second part on a corresponding side in the height direction of the vehicle.
With such a configuration, a specific connection mode between the front longitudinal beam rear section member and the foot plate is provided.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, the vehicle body front engine compartment framework further comprises: two lower inner A-pillar plates corresponding to the two front longitudinal beams, wherein the first part/second part is connected to the lower inner A-pillar plate on a corresponding side.
With such a configuration, a specific structural form of the vehicle body front engine compartment framework is provided.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, the vehicle body front engine compartment framework comprises: two supporting members corresponding to the two front longitudinal beams, wherein each of the supporting members covers at least a part of an outer side of the front longitudinal beam on a corresponding side, and the front longitudinal beam is connected to the first part/second part on a corresponding side by means of the supporting member.
With such a configuration, a specific connection form of the vehicle body front engine compartment framework is provided.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, each of the supporting members is connected to the first part/second part on a corresponding side in the length direction and the width direction of the vehicle, respectively.
With such a configuration, a specific connection form which is realized by the vehicle body front engine compartment framework by means of the supporting members is provided.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, each of the supporting members comprises a supporting body, the supporting body is fixedly connected to the front longitudinal beam on a corresponding side and the first part/second part on a corresponding side, and reinforcing ribs are provided on the supporting body.
With such a configuration, a specific structural form of the supporting member is provided.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, the base part, the first part and the second part are an integrally-formed casting.
With such a configuration, a specific structural form of the front longitudinal beam rear section member is provided.
Specifically, with such a structural form, difficulties in the manufacture of different components (for example, one of which is a cast part and another of which is an aluminum extruded part) themselves and in matching between the components are reduced, and the product consistency is improved.
For the above vehicle body front engine compartment framework 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, 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 SF37, HB-1, etc.
For the above vehicle body front engine compartment framework 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, and the rib assembly comprises first ribs extending generally in the width direction of the vehicle and second ribs forming an included angle with the first ribs.
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. 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.
For the above vehicle body front engine compartment framework of a vehicle, in a possible implementation, each of the second ribs comprises a plurality of sections, wherein viewed in the height direction of the vehicle, the second ribs of different sections 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 corresponding to the same width direction.
With such a configuration, a structural form of the second ribs in the rib assembly is provided.
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 vehicle body front engine compartment framework of a vehicle according to any one of the foregoing implementations, which will not be described in detail herein again.
Proposal 1. A vehicle body front engine compartment framework of a vehicle, comprising:
Proposal 2. The vehicle body front engine compartment framework of a vehicle according to proposal 1, wherein the vehicle is provided with a traction battery, and the traction battery is arranged on the base part at a position close to a lower part in a height direction of the vehicle,
Proposal 3. The vehicle body front engine compartment framework of a vehicle according to proposal 2, wherein the connecting unit comprises a plurality of connecting components arranged in the length direction of the vehicle, and the base part is connected to the cross beam by means of the plurality of connecting components.
Proposal 4. The vehicle body front engine compartment framework of a vehicle according to proposal 3, wherein at least some of the plurality of connecting components have different dimensions in the width direction of the vehicle.
Proposal 5. The vehicle body front engine compartment framework of a vehicle according to proposal 1, comprising:
Proposal 6. The vehicle body front engine compartment framework of a vehicle according to proposal 5, comprising:
Proposal 7. The vehicle body front engine compartment framework of a vehicle according to proposal 1, further comprising:
Proposal 8. The vehicle body front engine compartment framework of a vehicle according to proposal 1, comprising:
Proposal 9. The vehicle body front engine compartment framework of a vehicle according to proposal 8, wherein each of the supporting members is connected to the first part/second part on a corresponding side in the length direction and the width direction of the vehicle, respectively.
Proposal 10. The vehicle body front engine compartment framework of a vehicle according to proposal 8, wherein each of the supporting members comprises a supporting body, the supporting body is fixedly connected to the front longitudinal beam on a corresponding side and the first part/second part on a corresponding side, and reinforcing ribs are provided on the supporting body.
Proposal 11. The vehicle body front engine compartment framework of a vehicle according to proposal 1, wherein the base part, the first part and the second part are an integrally-formed casting.
Proposal 12. The vehicle body front engine compartment framework of a vehicle according to proposal 11, wherein the casting is made of C611 aluminum alloy free from heat treatment.
Proposal 13. The vehicle body front engine compartment framework of a vehicle according to proposal 1, wherein the front longitudinal beam rear section member is provided with a rib assembly on a side thereof close to the cross beam, and the rib assembly comprises first ribs extending generally in the width direction of the vehicle and second ribs forming an included angle with the first ribs.
Proposal 14. The vehicle body front engine compartment framework of a vehicle according to proposal 13, wherein each of the second ribs comprise a plurality of sections,
Proposal 15. A vehicle, comprising a vehicle body front engine compartment framework of a vehicle according to any one of proposals 1 to 14.
A vehicle body front engine compartment framework 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 themselves 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.
Referring mainly to
In a possible implementation, three connecting components are provided, and are denoted as a first connecting component 41, a second connecting component 42 and a third connecting component 43, wherein the second connecting component 42 and the third connecting component 43 are located on two sides of the first connecting component 41, the widths of the second connecting component 42 and the third connecting component 43 are slightly less than the width of the first connecting component 41, and the base part of the front longitudinal beam rear section member 2 is connected to the cross beam 3 by means of the connecting components (41, 42, 43).
As an example, the structures of the three connecting components are generally the same, and specifically, are each generally the structure of a sled board. 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 a 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 body front engine compartment framework 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 ”, and the first protruding end is of a bent structure protruding from a left side edge of the structure in the shape of Chinese character “
”. By means of a connector a 511, the first protruding end 51 is connected to a front side wall of the first part of the front longitudinal beam rear section member 2 in the length direction of the vehicle; and by means of a connector b 521, the second protruding end 52 is connected to the rocker panel 8(a) in the width direction of the vehicle. In addition, the first part is also directly connected to the rocker panel 8(a) in the width direction of the vehicle by means of a connector c 53.
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 a 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 (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
Referring mainly to
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 to resist torsional deformation in the 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.
Based on the above structure, for a force transmission path of the vehicle body front engine compartment framework according to the disclosure in the case of a vehicle collision, reference may be made to
It can be seen that in the vehicle body front engine compartment framework according to the disclosure, 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. Based on the structural design including the new front longitudinal beam rear section member, the vehicle body front engine compartment framework according to the disclosure re-plans a force transmission path after a vehicle collision, 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 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 |
|---|---|---|---|
| 202210633681.X | Jun 2022 | CN | national |
