CN118810919A - Rear body structure and vehicle - Google Patents
Rear body structure and vehicle Download PDFInfo
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- CN118810919A CN118810919A CN202310415555.1A CN202310415555A CN118810919A CN 118810919 A CN118810919 A CN 118810919A CN 202310415555 A CN202310415555 A CN 202310415555A CN 118810919 A CN118810919 A CN 118810919A
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- rear floor
- longitudinal beam
- floor
- beams
- sides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/088—Details of structures as upper supports for springs or dampers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/16—Mud-guards or wings; Wheel cover panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
本发明提供了一种车身后部结构与车辆，该车身后部结构包括后地板总成，以及分设在左右两侧的轮罩后加强梁；后地板总成具有分设在左右两侧的后轮罩，各侧轮罩后加强梁的下部连接在同侧后轮罩上，且两侧轮罩后加强梁的底端分布在后地板总成中的后地板后横梁的左右两侧；各侧轮罩后加强梁的顶端延伸至D柱与顶盖后横梁的交叉位置，且顶盖后横梁、后地板后横梁，以及两侧的轮罩后加强梁连接形成环形结构。本发明的车身后部结构通过轮罩后加强梁的设置，并使得顶盖后横梁、后地板后横梁，以及两侧轮罩后加强梁连接形成环形结构，可配合于两侧D柱以及顶盖后横梁和后围形成的环形结构，能够更好地提升车身后部位置的刚度，并有助于碰撞力的传递分散。
The present invention provides a vehicle body rear structure and a vehicle, the vehicle body rear structure includes a rear floor assembly and wheel cover rear reinforcement beams arranged on the left and right sides; the rear floor assembly has rear wheel covers arranged on the left and right sides, the lower part of the rear reinforcement beam of each wheel cover is connected to the rear wheel cover on the same side, and the bottom ends of the rear reinforcement beams of the wheel covers on both sides are distributed on the left and right sides of the rear cross beam of the rear floor in the rear floor assembly; the top end of the rear reinforcement beam of each wheel cover extends to the intersection of the D-pillar and the rear cross beam of the top cover, and the rear cross beam of the rear floor, and the rear reinforcement beams of the wheel covers on both sides are connected to form an annular structure. The vehicle body rear structure of the present invention is provided with a wheel cover rear reinforcement beam, and the rear cross beam of the top cover, the rear cross beam of the rear floor, and the rear reinforcement beams of the wheel covers on both sides are connected to form an annular structure, which can be matched with the annular structure formed by the D-pillars on both sides and the rear cross beam of the top cover and the rear enclosure, so as to better improve the rigidity of the rear position of the vehicle body and help to transmit and disperse the collision force.
Description
Technical Field
The invention relates to the technical field of vehicle body structures, in particular to a vehicle body rear structure. The invention also relates to a vehicle provided with the above vehicle body rear structure.
Background
The design of the rear structure of the vehicle body has important properties for the structural strength and the safety collision performance of the whole vehicle body, especially for the vehicle type with a D pillar, the upper part of the rear wheel cover generally corresponds to the C pillar. In the existing structure, the structural strength of the rear wheel cover position and the structural strength of the C column and the D column position are generally weak, and the rear-row passengers are easily damaged during side collision. In addition, the force transmission path at the rear part of the automobile body is less, the collision safety performance is poor, when side collision occurs, the collision force received by the rear side part of the automobile body is difficult to be rapidly transmitted and dispersed to other parts, the deformation of the part is serious, and the rear passengers are easily damaged greatly.
Disclosure of Invention
In view of the above, the present invention aims to provide a rear structure of a vehicle body, which can improve rigidity of a rear position of the vehicle body, and facilitate transmission and dispersion of collision force, so as to improve safety of the whole vehicle.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a rear structure of a vehicle body comprises a rear floor assembly and wheel cover rear reinforcement beams which are respectively arranged at the left side and the right side;
The rear floor assembly is provided with rear wheel covers which are respectively arranged at the left side and the right side, the lower parts of the rear reinforcement beams of the wheel covers at the same side are connected to the rear wheel covers, and the bottom ends of the rear reinforcement beams of the wheel covers at the two sides are distributed at the left side and the right side of the rear cross beam of the rear floor in the rear floor assembly;
The top end of the wheel cover rear stiffening beam on each side extends to the crossing position of the D column and the top cover rear cross beam, the rear floor rear cross beam and the wheel cover rear stiffening beams on two sides are connected to form an annular structure.
Further, the front reinforcement beam is respectively arranged at the left side and the right side of the wheel cover; the front reinforcing beams of the wheel covers on each side are arranged in front of the rear reinforcing beams of the wheel covers on the same side by side; the top of the front reinforcing beam of the wheel cover on each side extends upwards along the C column on the same side, and the bottom of the front reinforcing beam of the wheel cover on each side is connected to the rear wheel cover on the same side and is connected with the upper cross beam of the rear floor through a cross beam connecting plate.
Further, the rear floor assembly comprises a rear floor framework formed integrally and a rear floor panel connected to the top of the rear floor framework; the rear floor framework is provided with rear floor longitudinal beam bodies which are respectively arranged at the left side and the right side, and rear floor rear cross beams which are connected between the rear floor longitudinal beam bodies at the two sides, and each rear wheel cover is connected to the rear floor longitudinal beam bodies at the same side.
Further, a crush zone is formed at the rear portion of the rear floor side member main body on at least one side, and is configured to crush and deform preferentially at the time of a vehicle collision.
Further, the crush section includes the crush groove that follows skeleton body direction of height sets up, along whole car fore-and-aft direction, the width of crush groove is between 20mm-50mm, just the crush section is followed a plurality of rear floor longeron main part length direction interval arrangement.
Further, the distance between two adjacent crumple sections along the front-back direction of the whole vehicle gradually increases from the back to the front along the front-back direction of the whole vehicle.
Further, a rear shock absorber spring mounting point is arranged on the rear floor longitudinal beam main body, the crumple section is positioned behind the rear shock absorber spring mounting point along the front-rear direction of the whole vehicle, and a rear shock absorber spring reinforcing plate which is arranged corresponding to the rear shock absorber spring mounting point is arranged inside the rear floor longitudinal beam main body; and/or, the rear end of the rear floor longitudinal beam main body is provided with a rear anti-collision beam connecting plate positioned in the rear floor longitudinal beam main body, and the rear end of the rear anti-collision beam connecting plate extends out of the rear floor longitudinal beam main body and is connected with a rear anti-collision beam.
Further, the top of the rear floor longitudinal beam main bodies at two sides is provided with longitudinal beam cover plates, the rear floor longitudinal beam main bodies at each side and the longitudinal beam cover plates form a rear floor longitudinal beam together, and the rear floor panel is positioned between the longitudinal beam cover plates at two sides; the bottom ends of the wheel cover rear stiffening beams on all sides are connected to the longitudinal beam cover plates on the same side, and the cross beam connecting plates on all sides are connected between the rear wheel cover and the longitudinal beam cover plates on the same side.
Further, the rear floor skeleton is further provided with a rear floor middle cross beam connected between the rear floor longitudinal beam main bodies at two sides, and the front end of the rear floor assembly is provided with a rear floor front cross beam connected between the front ends of the rear floor longitudinal beams at two sides; the two sides of the rear floor longitudinal beam are respectively provided with a force transfer beam, the front ends of the force transfer beams on the two sides are connected with the front cross beam of the rear floor, and the rear ends of the force transfer beams on the two sides are connected to the rear floor longitudinal beam on the same side.
Furthermore, the force transfer beams at all sides gradually incline to one side of the rear floor longitudinal beam at the same side from front to back along the front and back direction of the whole vehicle, and form a herringbone structure with the rear floor longitudinal beam at the same side, and the rear ends of the force transfer beams at all sides are connected with the middle cross beam of the rear floor through the rear floor panel.
Further, the left and right sides of the middle cross beam of the rear floor are provided with stiffening beams positioned in the longitudinal beam main body of the rear floor, and the stiffening beams on the two sides are obliquely arranged to one side of the tail of the vehicle along the direction pointing to the outside of the vehicle in the left and right directions of the whole vehicle.
Compared with the prior art, the invention has the following advantages:
According to the rear structure of the vehicle body, through the arrangement of the rear reinforcing beams of the wheel covers, the rear cross beams of the top cover, the rear floor and the rear reinforcing beams of the wheel covers on two sides are connected to form the annular structure, the rear structure can be matched with the annular structure formed by the D columns on two sides, the rear cross beams of the top cover and the rear periphery, the rigidity of the rear position of the vehicle body can be better improved, meanwhile, a through force transmission channel can be formed at the rear position of the vehicle body, the transmission dispersion of collision force is facilitated, and the safety of the whole vehicle can be improved.
In addition, through the stiffening beam before the wheel casing that sets up to make the stiffening beam before the both sides wheel casing be connected with the rear floor entablature, can form new loop configuration in C post position, can promote the regional rigidity of C post from this, and increase the biography power passageway, and be favorable to further promoting whole car security. The rear floor framework is integrally formed, so that the preparation of the rear floor framework can be facilitated, the preparation cost is reduced, and meanwhile, the structural strength of the rear floor framework can be ensured.
Secondly, set up the section of collapsing that the priority collapses and warp when the collision at the rear portion of back floor longeron, can play the guide effect of collapsing when the collision, not only can absorb collision energy better, also can avoid the longeron front portion to collapse earlier and lead to longeron unstability to can promote whole car collision security. The crumple section is a crumple groove, and has simple structure and is convenient for design and molding. The arrangement of the width of the crumple groove can ensure the structural strength of the rear floor longitudinal beam on the basis of meeting the crumple performance, the crumple sections are arranged in a plurality of intervals, the crumple energy absorption effect during collision is guaranteed, and the collision safety can be further improved. And the distance between the adjacent crumple sections is gradually increased from the back to the front along the front and back directions of the whole vehicle, so that the gradual energy absorption effect can be realized, the collision energy absorption capacity is improved, and the influence on the safety of the vehicle due to excessive compression in the length direction of the rear floor longitudinal beam is avoided.
Furthermore, the crumple zone is arranged behind the mounting point of the rear shock absorber spring, so that the influence of collision on parts such as the rear shock absorber spring and the like can be reduced, and the safety of vehicle parts during collision can be improved. The arrangement of the rear anti-collision beam connecting plate can facilitate the installation of the rear anti-collision beam, and simultaneously can improve the stability of the installation of the rear anti-collision beam together with the rear floor longitudinal beam. The rear floor longitudinal beam main body and the longitudinal beam cover plate jointly form the rear floor longitudinal beam, so that the integral rear floor longitudinal beam can be formed on the basis of integral thermal forming of the rear floor framework, and the integral structural property of the rear floor longitudinal beam can be ensured.
In addition, through setting up the dowel steel in back floor longeron inboard, can be when bumping after taking place, through dowel steel and back floor longeron transmission collision force together, can improve collision force transmission effect, also can avoid collision force to all act on back floor longeron, cause back floor longeron front portion to buckle, and can promote whole car collision security. The V-shaped structure is formed between the force transfer beam and the rear floor longitudinal beam, so that the transmission of collision force at the force transfer beam can be facilitated, and the transmission effect of the collision force is improved. The force transfer beam is connected with the middle cross beam of the rear floor, so that the reliability of the connection of the force transfer beam and the rear floor framework can be improved on the basis of the connection of the force transfer beam and the rear floor longitudinal beam, and the transmission of collision force at the rear floor framework to the force transfer beam is facilitated.
In addition, through the stiffening beam that sets up to make stiffening beam and incline to tail one side, can increase the continuity of the biography power passageway that forms between stiffening beam and the back floor longeron, do benefit to the collision force transmission dispersion of stiffening beam transmission to back floor longeron peripheral spare, and help promoting whole car collision security.
Another object of the present invention is to propose a vehicle in which the vehicle body is provided with the vehicle body rear structure as described above.
Compared with the prior art, the vehicle and the vehicle body rear structure have the same beneficial effects and are not repeated here.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic view of a structure of a vehicle body rear structure according to an embodiment of the present invention from a first perspective;
fig. 2 is a schematic structural view of a second view angle of a vehicle body rear structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of a rear floor assembly from a first perspective according to an embodiment of the invention;
FIG. 4 is a schematic view of a rear floor assembly from a second perspective according to an embodiment of the invention;
FIG. 5 is a schematic view of a rear floor assembly from a third perspective according to an embodiment of the invention;
FIG. 6 is a schematic view of a rear floor frame according to an embodiment of the present invention from a first perspective;
FIG. 7 is a schematic view of a rear floor frame according to an embodiment of the present invention from a second perspective;
FIG. 8 is a schematic view of a third view of a rear floor frame according to an embodiment of the present invention;
FIG. 9 is a schematic view showing the assembly of a rear floor frame with a floor panel and a stringer cover according to an embodiment of the present invention;
FIG. 10 is an exploded view of a rear floor front cross member and floor panel and stringer cover plate in accordance with an embodiment of the present invention;
FIG. 11 is a schematic structural view of an assembled state of a rear bumper beam connecting plate and a rear floor frame according to an embodiment of the present invention;
FIG. 12 is an enlarged view of portion B of FIG. 11;
FIG. 13 is a schematic view of the transfer beam and stiffening beam of an embodiment of the present invention in a rear floor assembly;
FIG. 14 is an enlarged view of a front end portion of a rear floor assembly according to an embodiment of the invention;
FIG. 15 is a schematic view of the arrangement of transfer beams and stiffening beams in a rear floor assembly according to an embodiment of the invention;
Fig. 16 is a schematic structural view of a force transfer beam according to an embodiment of the present invention;
FIG. 17 is a schematic view of a reinforcement beam according to an embodiment of the present invention;
Reference numerals illustrate:
1. A rear floor frame; 2. a longitudinal beam connecting plate; 3. a rear floor panel; 4. a rear wheel cover; 5. a rear bumper beam; 6. a rear floor cross member; 7. a rear floor upper cross member; 8. a stringer cover plate; 9. a transfer beam; 10. a stiffening beam; 11. a wheel cover rear stiffening beam; 12. a wheel cover front stiffening beam; 13. a beam connecting plate; 14. a C column; 15. a D column; 16. a top cover rear cross member;
101. A stringer main body; 102. a middle cross beam body; 103. a rear cross member main body; 104. a crush section; 105. a rear shock absorber spring mounting point; 1010. a stringer cavity; 1030. a beam cavity; 106. a rear shock absorber spring stiffener; 107. a rear anti-collision beam connecting plate; 1071. an end plate; 601. a rear floor front cross member; 602. a rear floor center cross member; 603. a rear floor rear cross member; 801. a first stringer cover plate; 802. a second stringer cover plate; 901. a first connecting flange; 902. a second connecting flanging; 903. a third connecting flanging; 904. fourth connecting flanging; 1001. fifth connecting flanging; 1002. a sixth connecting flanging; 1003. and seventh connecting flanging.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, in the description of the present invention, unless otherwise specifically defined, the mating components may be connected using conventional connection structures in the art. Moreover, the terms "mounted," "connected," and "connected" are to be construed broadly. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in combination with specific cases.
In addition, the term "upper, lower, left, right, front, rear" used in the present embodiment is defined with reference to the up-down direction, the left-right direction, and the front-rear direction of the automobile. The vertical direction of the automobile, namely the height direction of the automobile, the front-back direction of the automobile, namely the length direction of the automobile, and the left-right direction of the automobile, namely the width direction of the automobile.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment relates to a vehicle body rear structure, so that rigidity of a vehicle body rear position can be improved, transmission and dispersion of collision force are facilitated, and accordingly safety of the whole vehicle can be improved.
As shown in fig. 1 to 5, the vehicle body rear structure of the present embodiment mainly includes a rear floor assembly, and wheel house rear reinforcement beams 11 provided separately on the left and right sides in terms of overall construction. The rear floor assembly is provided with rear wheel covers 4 which are respectively arranged at the left side and the right side, the lower parts of the rear reinforcing beams 11 of the wheel covers at the same side are connected to the rear wheel covers 4, the bottom ends of the rear reinforcing beams 11 of the wheel covers at the two sides are distributed at the left side and the right side of the rear floor beam 603 in the rear floor assembly, the top ends of the rear reinforcing beams 11 of the wheel covers at the two sides extend to the crossing position of the D column 15 and the top cover rear beam 16, the rear floor beam 603 and the rear reinforcing beams 11 of the wheel covers at the two sides are connected to form an annular structure.
In the above structure, through the wheel casing rear stiffening beam 11 that sets up to make top cap rear cross beam 16, back floor rear cross beam 603, and the annular structure that forms is connected to the stiffening beam 11 behind the both sides wheel casing, can cooperate in the annular structure that both sides D post 15 and top cap rear cross beam 16 and back enclose formation, can promote the rigidity of automobile body rear portion position better, also can form the transmission passageway that link up in automobile body rear portion position simultaneously, help the transmission dispersion of collision power, and can promote whole car security.
In detail, referring first to fig. 1 to 5, the rear floor assembly of the present embodiment mainly includes a rear floor frame 1, a rear floor panel 3 connected to the top of the rear floor frame 1, rear wheel covers 4 connected to the left and right sides of the rear floor frame 1, rear floor stringers, a rear floor upper cross member 7, a rear floor front cross member 601, a rear floor middle cross member 602, a rear floor rear cross member 603, and the like, wherein the upper ends of the rear wheel covers 4 correspond to the C pillar 14 of the vehicle.
As shown in fig. 1 and 2 and fig. 5, the lower parts of the rear reinforcement beams 11 of the wheel covers on the two sides are respectively connected to the rear wheel covers 4 on the same side, the bottom ends of the rear reinforcement beams 11 of the wheel covers on the two sides are distributed on the left side and the right side of the rear floor beam 603, and meanwhile, the top ends of the rear reinforcement beams 11 of the wheel covers on the two sides extend to the crossing positions of the D columns 15 and the rear top cover beam 16, so that the rear top cover beam 16, the rear floor beam 603 and the rear reinforcement beams 11 of the wheel covers on the two sides are connected to form an annular structure, the rigidity of the rear part of the vehicle body can be better improved, and meanwhile, the annular structure formed by the rear end beams 16 and the rear periphery of the top cover beam 15 on the two sides can form a through force transmission channel at the rear part of the vehicle body, thereby being beneficial to the transmission dispersion of collision force.
As a preferred embodiment, the vehicle body rear structure of the present embodiment further includes wheel house front reinforcement beams 12 provided separately on the left and right sides. With continued reference to fig. 1,2 and 5, the front reinforcement beams 12 of each side wheel cover are arranged side by side in front of the rear reinforcement beams 11 of the same side wheel cover. The top ends of the front reinforcing beams 12 extend upward along the C-columns 14 on the same side, and the bottom ends of the front reinforcing beams 12 are connected to the rear wheel covers 4 on the same side and to the rear floor upper cross member 7 via the cross member connecting plates 13.
The wheel cover front stiffening beams 12 are arranged, the wheel cover front stiffening beams 12 on two sides are connected with the rear floor upper cross beam 7, and a new annular structure can be formed at the position of the C column 14, so that the rigidity of the C column 14 area can be improved, a force transmission channel is increased, and the safety of the whole vehicle is further improved.
In this embodiment, the rear floor frame 1 in the rear floor assembly is preferably formed by integrally thermoforming, so that the preparation of the rear floor frame 1 can be facilitated, the preparation cost can be reduced, and the structural strength of the rear floor frame 1 can be ensured.
As a preferred embodiment, the rear floor frame 1 of the present embodiment is structured such that, as shown in fig. 6 to 8, the rear floor frame 1 has rear floor rail bodies provided separately on the left and right sides, and a rear floor cross member 6 connected between the rear rail bodies on both sides. The rear floor cross member 6 includes a rear floor center cross member 602 and a rear floor rear cross member 603, and the rear floor center cross member 602 and the rear floor rear cross member 603 include a center cross member main body 102 and a rear cross member main body 103, and the rear floor side member main body includes a side member main body 101. As also shown in fig. 6 to 8, the side member main body 101, the center cross member main body 102, and the rear cross member main body 103 form an integral skeleton. In addition, the girder body 101 is internally provided with the girder cavity 1010, so that the characteristic of high structural strength of the cavity can be utilized to improve the structural strength of the girder body 101.
In addition, a rear floor center cross member 602 is connected between the intersection of the side rail main bodies 101 and the rail connecting plates 2, a rear floor rear cross member 603 is connected between the side rail main bodies 101, and a cross member cavity 1030 penetrating the rail cavity 1010 is formed in the rear floor rear cross member 603. Through the crossbeam cavity 1030 that sets up in rear floor rear cross beam 603 to and make crossbeam cavity 1030 link up with longeron cavity 1010, not only the great characteristics of usable cavity structure improve rear floor rear cross beam 603's structural strength, also do benefit to the overall rigidity that improves rear floor skeleton 1 moreover, promote the torsional rigidity at automobile body rear portion.
In this embodiment, the rear wheel covers 4 on the two sides are specifically connected to the rear floor rail main body on the same side, that is, the rear wheel cover 4 is connected to the rail main body 101. The structural strength of the rear floor frame 1 can be facilitated, and the structural strength of the rear wheel cover 4 can be ensured.
In this embodiment, a crush zone 104 that is deformed by crush preferentially at the time of a vehicle collision is formed in the rear portion of at least one side rear floor side member main body and also in the rear portion of the side member main body 101. The arrangement of the crumple sections 104 can play a crumple guiding role in collision, not only can absorb collision energy better, but also can avoid the instability of the longitudinal beam caused by the front crumple of the longitudinal beam, thereby improving the collision safety of the whole vehicle.
It should be noted that the integral thermal forming is a forming process commonly adopted in the existing vehicle body manufacturing, which is generally to heat a steel plate to make it uniform austenitized, then send the steel plate into a mold with a cooling system therein for press forming, finally cool the steel plate to convert austenite into martensite, etc., and complete the forming process, through which the prepared vehicle body component can be hardened, so that the strength thereof can be greatly improved.
In this embodiment, in particular, in implementation, it may be preferable to use a laser welding thermal forming process, that is, before the thermal stamping forming process, a laser welding technology is used to splice the plates with different materials, plate thicknesses and plating layers, and weld to form a whole plate, and then the whole plate is subjected to thermal stamping forming. The ultra-wide plate and the requirements of different parts on the technological performance can be solved by laser splice welding, and the method has good effects in the aspects of reducing the vehicle body, reducing the cost of the whole vehicle, saving energy, protecting environment and the like.
In the present embodiment, the crush zone 104 may be, for example, a crush can formed in the rear floor side member and provided in the height direction of the carcass body 1. Thus, the device has the characteristics of simple structure and convenience in design and molding. However, rather than being crush cans, crush can 104 can be designed as other crush structures, such as crush ribs, to achieve the desired design results as well.
In addition, it is worth to be noted that, in the thermoforming process, by using the arrangement of the cooling system in the mold and controlling the cooling temperature, the present embodiment may also enable the portion where the designed crumple zone is located to be transformed from austenite into a martensite, bainite or pearlite structure with lower hardness, while other portions are still transformed into uniform martensite. Thus, a sheet of material can be realized, different hardness properties can be obtained at different positions, and the requirements of the crumple zone 104 on crumple setting can be well met.
In this embodiment, the crush zone 104 is preferably formed in the rear portion of the side member main body 101 on both sides. It will of course be appreciated that it is also possible to form the crush zone 104 only on the rear of the stringer body 101 on one side.
In a preferred embodiment, the width of the crush cans forming crush section 104 in the front-rear direction of the vehicle is between 20mm and 50 mm. In particular, the width of the crush can be, for example, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, or the like. The arrangement of the width of the crumple groove can ensure the structural strength of the rear floor longitudinal beam main body on the basis of meeting the crumple performance.
In a further preferred embodiment, the crush section 104 is a plurality of crush sections spaced apart along the length of the rear floor rail body. Therefore, the crumple energy absorption effect during collision can be further guaranteed, and the collision safety is improved. Referring to fig. 6 and 7, in this embodiment, the crush boxes 104 are specifically three of the rear floor stringer bodies that are arranged at intervals in the length direction, and it will be understood that the number of the crush boxes 104 may be two, four, or any other number, which is not limited in this embodiment.
In a further preferred embodiment, the distance between two adjacent crush zones 104 in the front-rear direction of the vehicle increases gradually from the rear to the front in the front-rear direction of the vehicle. I.e., the smaller the distance between adjacent crush sections 104 at the rear, the greater the distance between adjacent crush sections 104 closer to the front. The structure is arranged, so that the gradual energy absorption effect can be realized, the collision energy absorption capacity can be improved, and the influence on the safety of the vehicle due to excessive compression of the rear floor longitudinal beam in the length direction is avoided.
In this embodiment, a rear shock absorber spring mounting point 105 is also provided on the rear floor rail main body, that is, on the rail main body 101, and the rear shock absorber spring mounting point 105 is specifically a rear coil spring support fixedly attached to the rear floor rail, and the crumple zone 104 is located behind the rear shock absorber spring mounting point 105 in the front-rear direction of the entire vehicle. By placing crush section 104 behind the rear shock absorber spring mounting point, the impact of a collision on components such as the rear shock absorber spring can be reduced, thereby facilitating increased safety of the vehicle components during a collision.
Also, as shown in fig. 11 and 12, a rear absorber spring reinforcing plate 106 arranged corresponding to the rear absorber spring mounting point 105 is provided inside the rear floor rail main body, that is, inside the rail main body 101. The setting of this back shock absorber spring reinforcing plate 106 can improve the intensity of shock absorber spring mounting point 105 to can promote the stability of back shock absorber spring setting.
In this embodiment, a rear bumper beam connection plate 107 located in the stringer cavity 1010 is provided at the rear end of the stringer main body 101, and the rear end of the rear bumper beam connection plate 107 extends out of the stringer cavity 1010 and is connected to the rear bumper beam 5. Specifically, as shown in fig. 3 and 5 in combination with fig. 11 and 12, the rear bumper beam connecting plate 107 is located in the longitudinal beam cavity 1010 and is welded and fixedly connected to the longitudinal beam main body 101, and the rear end of the rear bumper beam connecting plate 107 extends out of the longitudinal beam cavity 1010, and an end plate 1071 is provided at the rear end of the rear bumper beam connecting plate 107, and a first connecting hole is provided on the end plate 1071.
Corresponding end plate 1071 is equipped with the tie-beam on the back crashproof roof beam 5, and the front end of tie-beam corresponds and is equipped with the second connecting hole, through wearing to establish the threaded connection piece in first connecting hole and second connecting hole for end plate 1071 links to each other with the tie-beam spiro union, also makes back crashproof roof beam connecting plate 107 be connected with back crashproof roof beam 5. Through the rear crashproof roof beam connecting plate 107 that sets up at the rear end of longeron main part 101, not only can be convenient for the installation of rear crashproof roof beam 5, also can improve the stability of rear crashproof roof beam 5 installation together with the rear floor longeron main part.
In order to better improve the structural strength of the rear floor rail main body, in this embodiment, a rail cover plate 8 is provided at the top of the rear floor rail main body, and the rear floor rail main body and the rail cover plate 8 on each side form a rear floor rail in the vehicle body together, and the rear floor panel 3 is located between the rail cover plates 8 on both sides. The rear floor longitudinal beam main body and the longitudinal beam cover plate 8 jointly form a rear floor longitudinal beam, so that the integral rear floor longitudinal beam can be formed on the basis of integral thermal forming of the rear floor framework 1, and the integral structural property of the rear floor longitudinal beam can be ensured.
Referring to fig. 3 and 5 in combination with fig. 9 and 10, the stringer cover 8 specifically includes a first stringer cover 801 and a second stringer cover 802 that are connected together. The first stringer cover plate 801 and the second stringer cover plate 802 are arranged one behind the other.
The longitudinal beam cover plate 8 at the longitudinal beam main body 101 covers the longitudinal beam cavity 1010, and the longitudinal beam cover plate 8 at the longitudinal beam connecting plate 2 and the longitudinal beam connecting plate 2 enclose a cavity communicated with the longitudinal beam cavity 1010. I.e. the first stringer cover plate 801 encloses a cavity with the stringer connecting plate 2. The rear portion of the first stringer cover 801 and the second stringer cover 802 enclose a stringer cavity 1010 to form a closed cavity structure. As set forth above, the girder connecting plate 2, the first girder cover plate 801 and the second girder cover plate 802 of the girder main body 101 are enclosed to form a cavity, so that the structural strength of the rear floor girder main body can be better improved.
In this embodiment, the bottom ends of the rear reinforcement beams 11 of the wheel covers on the respective sides are specifically connected to the side member cover plates 8 on the same side. Each side beam connecting plate 13 is connected between the rear wheel cover 4 and the longitudinal beam cover plate 8 on the same side, and the bottom end of each side beam connecting plate 13 is connected with the rear floor upper beam 7. So that a coherent force transmission channel can be formed by utilizing the rear floor longitudinal beam and the rear floor upper cross beam 7, thereby facilitating the transmission of collision force.
In this embodiment, the both sides of back floor skeleton 1 front end are connected with longeron connecting plate 2, and longeron connecting plate 2 sets up, is favorable to adapting to the arrangement requirement of back floor longeron main part in whole car. In this embodiment, the front end of the rear floor assembly is also provided with a rear floor front cross member 601 connected between the front ends of the rear floor stringers on both sides, that is, the rear floor front cross member 601 is connected between the front ends of the stringer connecting plates 2 on both sides.
The rear floor front cross member 601 is constructed in a specific structure, as shown in fig. 3 and 10, and the rear floor front cross member 601 includes a front cross member body having a cross section of "n", which is connected to front ends of the side member bodies 101 on both sides and welded to the rear floor panel 3. The rear floor front cross member 601 can be arranged together with the rear floor frame 1, so that the overall structural strength of the rear part of the vehicle body is improved, a collision force transmission channel is increased, and the safety of the whole vehicle is improved.
As a further improvement of the present embodiment, in the present embodiment, the side of the rear floor stringers on both sides, which is close to the interior of the vehicle, is provided with the transfer beams 9, the front ends of the transfer beams 9 on each side are connected to the rear floor front cross member 601, and the rear ends of the transfer beams 9 on each side are connected to the rear floor stringers on the same side.
As shown in fig. 13 to 15, and as shown in fig. 1,2 and 5, the side transfer beams 9 of the present embodiment are provided on the side of the rear floor side member main body close to the inside of the vehicle, and the side transfer beams 9 are located above the rear floor panel 3. The front ends of the side transfer beams 9 are connected to the rear floor front cross member 601, and the rear ends of the side transfer beams 9 are connected to the same-side rear floor side members, that is, the rear ends of the transfer beams 9 are connected to the side member main body 101.
Also, preferably, each side force transfer beam 9 is gradually inclined to one side of the same side rail main body 101 from front to back in the front-rear direction of the entire vehicle, and forms a herringbone structure with the same side rear floor rail, and the rear ends of each side force transfer beam 9 are connected to the rear floor center cross member 602 through the rear floor panel 3. So, can be when bumping after taking place, through the transmission roof beam 9 with longeron main part 101 transmission collision force together, improve the transmission effect of collision force, and also can avoid the collision force to all act on the rear floor longeron main part, cause the front portion of rear floor longeron main part to buckle, and can promote whole car collision security.
With continued reference to fig. 14 to 16, in this embodiment, the two side transfer beams 9 are substantially identical in specific structure, the cross sections of the two side transfer beams 9 are both n-shaped, and a cavity is formed between the two side transfer beams 9 and the rear floor panel 3. The characteristic that the structural strength of the cavity is high can be utilized, the structural strength of the force transfer beam 9 is guaranteed, and the collision force transmission capacity is improved.
In order to facilitate a better understanding of the solution, a detailed description will be given below taking the left-hand transfer beam 9 as an example. Still referring to fig. 14 to 16, the transfer beam 9 comprises a beam body having a cross-section of "n" shape, which has a first connection flange 901, a second connection flange 902, a third connection flange 903 and a fourth connection flange 904 in the circumferential direction. Wherein, first connection turn-ups 901 and back floor front cross beam 601 welding link to each other, and second connection turn-ups 902 and third connection turn-ups 903 are established in the both sides of the same one end of roof beam main part, and second connection turn-ups 902 and back floor middle cross beam 602 welding link to each other, and third connection turn-ups 903 and back floor longeron main part welding link to each other.
As a preferred implementation manner of the present embodiment, in the present embodiment, the left and right sides of the beam 602 in the rear floor are provided with the stiffening beams 10 located in the longitudinal beam cavities 1010, and in the left and right directions of the whole vehicle, the stiffening beams 10 on both sides are disposed obliquely to the rear side along the direction pointing to the outside of the vehicle. Through the stiffening beam 10 that sets up to make stiffening beam 10 to the slope of tail one side arrange, be favorable to increasing the continuity of the biography power passageway that forms between stiffening beam 10 and the back floor longeron main part, the collision force that does benefit to stiffening beam 10 transmission is to back floor longeron main part periphery piece transmission dispersion, thereby helps promoting whole car collision security.
Referring to fig. 13 in combination with fig. 17, the reinforcement beam 10 of the present embodiment is disposed in the longitudinal beam cavity 1010 in an inclined manner, and a fifth connection flange 1001, a sixth connection flange 1002 and a seventh connection flange 1003 are also provided in the circumferential direction of the reinforcement beam 10, wherein the fifth connection flange 1001 and the seventh connection flange 1003 are respectively welded to opposite side walls forming the longitudinal beam cavity 1010, and the sixth connection flange 1002 is welded to a bottom wall forming the longitudinal beam cavity 1010.
The vehicle body rear structure of the embodiment not only can better improve the rigidity of the vehicle body rear position, but also can form a through force transmission channel at the vehicle body rear position, is beneficial to the transmission dispersion of collision force, and can improve the crumple energy absorption effect during collision, so that the safety of the whole vehicle can be improved.
Further, the present embodiment also relates to a vehicle in which the vehicle body is provided with the vehicle body rear structure as described above.
The vehicle of this embodiment can promote the rigidity of automobile body rear portion position and the holistic rigidity of automobile body through using automobile body rear portion structure as above to also do benefit to the transmission dispersion of collision power, also can promote the energy-absorbing effect that collapses during the collision simultaneously, and can promote whole car security.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (12)
1. A vehicle body rear structure, characterized in that:
Comprises a rear floor assembly and wheel cover rear reinforcement beams (11) which are respectively arranged at the left side and the right side;
the rear floor assembly is provided with rear wheel covers (4) which are respectively arranged at the left side and the right side, the lower parts of the rear wheel cover reinforcing beams (11) at each side are connected to the rear wheel cover (4) at the same side, and the bottom ends of the rear wheel cover reinforcing beams (11) at the two sides are distributed at the left side and the right side of a rear floor rear cross beam (603) in the rear floor assembly;
The top ends of the wheel cover rear stiffening beams (11) on each side extend to the crossing position of the D columns (15) and the top cover rear cross beam (16), the rear floor rear cross beam (603) and the wheel cover rear stiffening beams (11) on two sides are connected to form an annular structure.
2. The vehicle body rear structure according to claim 1, characterized in that:
The front reinforcement beam (12) is respectively arranged at the left side and the right side of the wheel cover;
The front reinforcement beams (12) of the wheel cover on each side are arranged in front of the rear reinforcement beams (11) of the wheel cover on the same side;
The top ends of the wheel cover front stiffening beams (12) on each side extend upwards along C columns (14) on the same side, and the bottom ends of the wheel cover front stiffening beams (12) on each side are connected to the rear wheel cover (4) on the same side and are connected with a rear floor upper cross beam (7) through a cross beam connecting plate (13).
3. The vehicle body rear structure according to claim 2, characterized in that:
The rear floor assembly comprises a rear floor framework (1) formed integrally and a rear floor panel (3) connected to the top of the rear floor framework (1);
the rear floor skeleton (1) is provided with rear floor longitudinal beam bodies which are respectively arranged at the left side and the right side, and rear floor rear cross beams (603) which are connected between the rear floor longitudinal beam bodies at the two sides, and each rear wheel cover (4) is connected to the rear floor longitudinal beam bodies at the same side.
4. A vehicle body rear structure according to claim 3, characterized in that:
A crush zone (104) is formed in the rear portion of the rear floor side member body on at least one side, and is configured to crush and deform preferentially in the event of a vehicle collision.
5. The vehicle body rear structure according to claim 4, characterized in that:
The crumple sections (104) comprise crumple grooves arranged along the height direction of the rear floor framework (1), the width of each crumple groove is 20-50 mm along the front-rear direction of the whole car, and the crumple sections (104) are arranged at intervals along the length direction of the rear floor longitudinal beam main body.
6. The vehicle body rear structure according to claim 5, characterized in that:
the distance between two adjacent crumple sections (104) along the front-back direction of the whole vehicle gradually increases from back to front along the front-back direction of the whole vehicle.
7. The vehicle body rear structure according to claim 4, characterized in that:
the rear floor longitudinal beam main body is provided with a rear shock absorber spring mounting point (105), the crumple section (104) is positioned behind the rear shock absorber spring mounting point (105) along the front-rear direction of the whole vehicle, and the rear floor longitudinal beam main body is internally provided with a rear shock absorber spring reinforcing plate (106) which is arranged corresponding to the rear shock absorber spring mounting point (105); and/or the number of the groups of groups,
The rear end of the rear floor longitudinal beam main body is provided with a rear anti-collision beam connecting plate (107) positioned inside the rear floor longitudinal beam main body, and the rear end of the rear anti-collision beam connecting plate (107) extends out of the rear floor longitudinal beam main body and is connected with a rear anti-collision beam (5).
8. A vehicle body rear structure according to claim 3, characterized in that:
The tops of the rear floor longitudinal beam main bodies at two sides are respectively provided with a longitudinal beam cover plate (8), the rear floor longitudinal beam main bodies at each side and the longitudinal beam cover plates (8) form a rear floor longitudinal beam together, and the rear floor panel (3) is positioned between the longitudinal beam cover plates (8) at two sides;
The bottom ends of the wheel cover rear stiffening beams (11) on each side are connected to the longitudinal beam cover plates (8) on the same side, and the cross beam connecting plates (13) on each side are connected between the rear wheel cover (4) and the longitudinal beam cover plates (8) on the same side.
9. The vehicle body rear structure according to claim 8, characterized in that:
The rear floor framework (1) is also provided with a rear floor middle cross beam (602) connected between the rear floor longitudinal beam main bodies at two sides, and the front end of the rear floor assembly is provided with a rear floor front cross beam (601) connected between the front ends of the rear floor longitudinal beams at two sides;
And the two sides of the rear floor longitudinal beam are respectively provided with a force transfer beam (9) close to one side in the vehicle, the front ends of the force transfer beams (9) on each side are connected with the rear floor front cross beam (601), and the rear ends of the force transfer beams (9) on each side are connected to the rear floor longitudinal beam on the same side.
10. The vehicle body rear structure according to claim 9, characterized in that:
The force transfer beams (9) at all sides gradually incline to one side of the rear floor longitudinal beam at the same side from front to back along the front and back direction of the whole vehicle, the force transfer beams and the rear floor longitudinal beam at the same side form a herringbone structure, and the rear ends of the force transfer beams (9) at all sides are connected with the rear floor middle cross beam (602) through the rear floor panel (3).
11. The vehicle body rear structure according to claim 10, characterized in that:
the left and right sides of back floor middle cross beam (602) all are equipped with be located stiffening beam (10) in the back floor longeron main part, in whole car left and right sides, along the direction outside the directional car, both sides stiffening beam (10) all set up to tail one side slope.
12. A vehicle, characterized in that:
A vehicle body in which the vehicle body rear structure according to any one of claims 1 to 11 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310415555.1A CN118810919A (en) | 2023-04-18 | 2023-04-18 | Rear body structure and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310415555.1A CN118810919A (en) | 2023-04-18 | 2023-04-18 | Rear body structure and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN118810919A true CN118810919A (en) | 2024-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310415555.1A Pending CN118810919A (en) | 2023-04-18 | 2023-04-18 | Rear body structure and vehicle |
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| Country | Link |
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| CN (1) | CN118810919A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119636919A (en) * | 2024-11-18 | 2025-03-18 | 广州汽车集团股份有限公司 | Vehicle body rear structure, vehicle body assembly and vehicle |
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| CN200957836Y (en) * | 2006-10-23 | 2007-10-10 | 重庆长安汽车股份有限公司 | Step-by-step energy-absorbing rear-collision longitudinal beam structure of car |
| EP3566931A1 (en) * | 2018-05-10 | 2019-11-13 | Mazda Motor Corporation | Vehicle body structure, and vehicle |
| CN113998009A (en) * | 2021-12-17 | 2022-02-01 | 蔚来汽车科技(安徽)有限公司 | Automobile and rear floor framework assembly thereof |
| CN115214791A (en) * | 2022-05-10 | 2022-10-21 | 广州汽车集团股份有限公司 | Body rear structure and vehicle |
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| JPH10129533A (en) * | 1996-11-06 | 1998-05-19 | Nissan Motor Co Ltd | Car body rear structure |
| CN200957836Y (en) * | 2006-10-23 | 2007-10-10 | 重庆长安汽车股份有限公司 | Step-by-step energy-absorbing rear-collision longitudinal beam structure of car |
| EP3566931A1 (en) * | 2018-05-10 | 2019-11-13 | Mazda Motor Corporation | Vehicle body structure, and vehicle |
| CN113998009A (en) * | 2021-12-17 | 2022-02-01 | 蔚来汽车科技(安徽)有限公司 | Automobile and rear floor framework assembly thereof |
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| CN119636919A (en) * | 2024-11-18 | 2025-03-18 | 广州汽车集团股份有限公司 | Vehicle body rear structure, vehicle body assembly and vehicle |
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