CN114906229B - Lower car body structure and vehicle - Google Patents
Lower car body structure and vehicle Download PDFInfo
- Publication number
- CN114906229B CN114906229B CN202210641101.1A CN202210641101A CN114906229B CN 114906229 B CN114906229 B CN 114906229B CN 202210641101 A CN202210641101 A CN 202210641101A CN 114906229 B CN114906229 B CN 114906229B
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- CN
- China
- Prior art keywords
- chassis
- cross
- beams
- threshold
- collision
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B62D25/20—Floors or bottom sub-units
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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
- B62D25/02—Side panels
- B62D25/025—Side sills thereof
-
- 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
- B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
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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
- B62D25/20—Floors or bottom sub-units
- B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
- B62D25/2036—Floors or bottom sub-units in connection with other superstructure subunits the subunits being side panels, sills or pillars
Abstract
The invention provides a lower vehicle body structure and a vehicle. The lower vehicle body structure includes: the chassis is provided with threshold on two sides; the plurality of cross beams are arranged on the chassis at intervals, and at least one cross beam is connected with the doorsill through a cross beam connecting part; the longitudinal beams are arranged on the chassis at intervals, at least two longitudinal beams in the longitudinal beams extend to the threshold position of the chassis and intersect at least one of the transverse beams to absorb part of collision energy in a deformation mode, and the longitudinal beams extending to the threshold position of the chassis are connected with the threshold through the front floor connecting support to digest part of collision kinetic energy. The invention can better absorb the collision moment in the front collision and the side collision.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a lower vehicle body structure and a vehicle.
Background
In the safety design of vehicles, the body structural design is the basis of passive safety. In the existing car body cabin, in order to increase the physical performance of the cabin so as to improve the safety of the cabin in the collision process, the influence of the collision on the passenger cabin is reduced, the safety of drivers and passengers is protected, and the cabin adopts reinforcing pieces. The common reinforcement is a skeleton beam, and the inventor believes that, due to the lack of an effective buffering mode between the longitudinal beam and the transverse beam in the reinforcement, even if moment can be transmitted between the longitudinal beam and the transverse beam, when the moment is overlarge, the transverse beam and the longitudinal beam are separated, so that the safety of the cabin is reduced.
Disclosure of Invention
An object of the present invention is to provide a lower body structure and a vehicle capable of resisting a large moment.
It is another object of the present invention to provide a lower body structure and vehicle having a responsive transition structure in the force transfer path.
In particular, the present invention provides a lower vehicle body structure including:
the chassis is provided with threshold on two sides;
the plurality of cross beams are arranged on the chassis at intervals, and at least one cross beam is connected with the doorsill through a cross beam connecting part;
the longitudinal beams are arranged on the chassis at intervals, at least two longitudinal beams in the longitudinal beams extend to the threshold position of the chassis and intersect at least one of the transverse beams to absorb part of collision energy in a deformation mode, and the longitudinal beams extending to the threshold position of the chassis are connected with the threshold through the front floor connecting support to digest part of collision kinetic energy.
Further, the chassis comprises a main board and side boards connected to two sides of the main board, and the beam connecting part is connected with the upper surface, the lower surface and the side boards of the main board to digest part of collision kinetic energy.
Further, the beam connection portion includes:
a housing connecting the at least one cross member, the upper surface of the chassis, and the threshold;
the first supporting plate is arranged in the shell and is connected with the threshold;
the second supporting plate is arranged in the shell and is connected with the lower surface of the chassis;
and the third support plate is arranged in the shell and is connected with the side plate.
Further, the second support plate is connected to the lower surface of the and/or side plate.
Further, the housing includes a bottom panel and a side panel connected to the bottom surface, and a cavity for accommodating the first, second and third support plates is formed between the bottom panel and the side panel.
Further, the side panel comprises a plurality of side panel parts which are connected in sequence, and an obtuse angle is formed between the adjacent side panel parts.
Further, in the plurality of cross beams, two ends of at least one cross beam are connected with the edge area of the chassis through connecting plates, the connecting plates are arched or U-shaped, and two end faces of the connecting plates are respectively connected with the at least two longitudinal beams and the threshold which extend to the threshold position of the chassis.
Further, the two side edges of the connecting plate are also connected with the chassis.
Further, the front floor connecting support, the connecting part and the threshold are connected in a riveting and cementing mode.
In particular, the invention also discloses a vehicle comprising the lower vehicle body structure.
In the invention, the form that the cross beam is intersected with the longitudinal beam is adopted, and the collision force can be transmitted to the threshold along the longitudinal beam in the frontal collision, so that the longitudinal beam can absorb part of collision energy by transmitting the collision moment to other parts of the engine room in the frontal collision; in side collision, a plurality of force transmission paths on the floor can be used for transmitting collision force from a collision side to a non-collision side, and front floor connecting supports are designed at overlapping positions of the threshold and the side collision force transmission paths, have elastic potential energy and are transition structures capable of responding, and play a good supporting role on the threshold in collision.
In the invention, a longitudinal supporting structure is also designed in the middle of the middle-rear force transmission path of the floor, so that the stability of side collision force transmission is ensured.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic top view of a front-side forced lower body structure according to one embodiment of the present invention;
FIG. 2 is a schematic top view of a side-on-side vehicle body structure according to one embodiment of the invention;
FIG. 3 is a schematic view of the internal structure of a beam connection according to one embodiment of the invention;
FIG. 4 is a schematic view of a beam attachment housing configuration according to one embodiment of the invention;
FIG. 5 is a schematic diagram of a connection plate structure according to one embodiment of the invention;
FIG. 6 is a schematic side view of a front forced lower body structure according to one embodiment of the invention;
in the figure:
1-cabin stringers;
2-front floor cross member;
3-underfloor stringers;
4-middle floor front cross beam;
5-a middle floor second cross beam;
6-middle floor middle cross beam;
7-a middle floor middle support beam;
8-a chassis back beam;
9-cabin longitudinal beam root connection;
10-a beam connection;
101-a first side panel portion;
102-a second side panel portion;
103-a third side panel portion;
104-a bottom panel;
1011-a first support plate;
1012-a second support plate;
1013-a third support plate;
11-connecting plates;
111-first protrusions;
112-a second protrusion;
113-a third protrusion;
114-fourth protrusions;
115-fifth projection;
116-sixth protrusions;
117-seventh tab;
12-side plates;
13-a main board;
14-middle floor middle cross beam;
15-front floor connecting bracket.
Detailed Description
FIG. 1 is a schematic top view of a front-side forced lower body structure according to one embodiment of the present invention. Particularly, the invention discloses a lower vehicle body structure, which comprises a chassis, a plurality of cross beams and a plurality of longitudinal beams, wherein the two sides of the chassis are provided with threshold bars, the plurality of cross beams are arranged on the chassis at intervals, at least one cross beam of the plurality of cross beams is connected with the threshold bars through a cross beam connecting part 10, the plurality of longitudinal beams are arranged on the chassis at intervals, at least two longitudinal beams of the plurality of longitudinal beams extend to the threshold position of the chassis and intersect with at least one of the plurality of cross beams to absorb part of collision energy in a deformation mode, and at least two longitudinal beams extending to the threshold position of the chassis are connected with the threshold bars through a front floor connecting bracket 15 to digest part of collision kinetic energy.
In this embodiment, in the form that the cross beam intersects the side member, the collision force can be transmitted to the side member along the side member in the frontal collision, so that the side member can absorb part of the collision energy by transmitting the collision moment to other parts of the cabin in the frontal collision. In side collision, a plurality of force transmission paths on the floor can be used for transmitting collision force from a collision side to a non-collision side, and front floor connecting supports 15 are arranged at overlapping positions of the threshold and the side collision force transmission paths, and the front floor connecting supports 15 have elastic potential energy and are transition structures capable of responding, so that the threshold is well supported in collision.
In one embodiment of the invention, the chassis is a chassis commonly found on vehicles, and the cabin in this embodiment is the space formed by the chassis in combination with the body in white. The chassis is divided into three parts, including a main board 13 in the middle and side boards 12 connected to two sides of the main board 13, so that the main board 13 and the side boards 12 of the chassis can form a structure which is easy to disperse collision moment, wherein the side boards 12 have the same supporting and connecting functions as the main board 13, and the strength of the side boards 12 is larger than that of the main board 13, so that the edge strength of the main board 13 is enhanced.
In one embodiment of the present invention, six beams are provided in total, wherein one beam is provided at the threshold position, and for convenience of description, the beam is named as a middle floor front beam 4 in this embodiment, and both ends of the middle floor front beam 4 are connected to the side plates 12 through beam connection parts 10. In addition to the middle floor front cross member 4, the present invention is provided with a middle floor second cross member 5, a middle floor middle cross member 6, a front floor lower cross member 14 and a front floor cross member 2, which are arranged in parallel to each other, and the front floor cross member 2, the front floor lower cross member 14, the middle floor front cross member 4, the middle floor second cross member 5 and the middle floor middle cross member 6 are arranged in this order from front to rear. The cross beam mainly plays a role in supporting the left and right directions of the lower car body.
In one embodiment of the invention four stringers are provided, comprising two cabin stringers 1 and two underfloor stringers 3. Generally, the side sills are designed to reduce collision deformation of the vehicle body, and in a front collision and an offset collision, a floor panel in a lower vehicle body structure is easily subjected to relatively serious buckling deformation, which causes movement of a front seat and injury to a rear passenger, and thus it is necessary to design the floor side sills 3. The front end of the underfloor girder 3 in this embodiment is fixed to the rear section of the cabin girder 1 by lap joint, and the rear end of the underfloor girder 3 is fixed to the center floor front cross member 4 described above.
In one embodiment of the invention, the front end of the underfloor longitudinal beam 3, the cabin longitudinal beam 1 and the front floor cross beam 2 are cross-connected, the perpendicular projection of which on the side plates 12 is located inside the end of the side plates 12, i.e. the cross-connection extends to the area of the side plates 12, and the two ends of the front floor cross beam 2 in the cross-connection are also connected to the side plates 12 by the cabin longitudinal beam root connection 9, so that in a frontal collision, the collision forces are transmitted through the middle floor front cross beam 4 and the cabin longitudinal beam 1 to the underfloor longitudinal beam 3 and the side plates 12, during which the front floor cross beam 4 and the cabin longitudinal beam 1 deform to absorb the collision energy. More specifically, the cabin longitudinal beam root connection 9 comprises a box-shaped shell and a connecting plate located in the shell, and the combined action of the shell and the connecting plate can further improve the energy absorbing capacity of the cabin longitudinal beam root connection 9 in the collision deformation process. More specifically, the side plates 12 in the present embodiment, that is, the threshold region of the vehicle body, since the cabin longitudinal beam 1 extends directly to the threshold region, the threshold and cabin longitudinal beam root connection 9 and the front underfloor cross member 14, the front floor cross member 2 provide better support for the passenger compartment, reduce deformation intrusion at the floor position, and thus provide better protection for the feet and lower legs of the driver and passengers.
In one embodiment of the present invention, the underfloor girder 3 and the side plate 12 are further connected by a front floor connecting bracket 15, and the front floor connecting bracket 15 is a box body, so that collision energy can be absorbed between the underfloor girder 3 and the side plate 12 by deformation of the front floor connecting bracket 15. It will be appreciated that the front floor connecting brackets 15 are offset from the front underfloor cross members 14, and are capable of deforming from the underfloor side members 3 during a side impact to absorb impact energy.
In one embodiment of the present invention, the beam connection 10 connects the upper and lower surfaces of the main plate 13 and the side plates 12 to digest part of collision kinetic energy. The beam connection part 10 includes a housing, a first support plate 1011, a second support plate 1012 and a third support plate 1013, the first support plate 1011, the second support plate 1012 and the third support plate 1013 are all disposed in the housing, the housing includes a bottom panel 104 and a side panel connected to the bottom surface, the side panel includes a plurality of sequentially connected side panel parts, an obtuse angle is formed between the adjacent side panel parts, a cavity for accommodating the first support plate 1011, the second support plate 1012 and the third support plate 1013 is formed between the bottom panel 104 and the side panel, and the first support plate 1011, the second support plate 1012 and the third support plate 1013 are respectively connected with different structures of the lower vehicle body, thereby transferring a collision moment applied to the housing to other parts of the lower vehicle body. Specifically, the first support plate 1011 is connected to the threshold, the second support plate 1012 is connected to the lower surface of the chassis, and the third support plate 1013 is connected to the side plate 12. It will be appreciated that the beam attachment 10 is not only a structure capable of absorbing energy, but also a structure capable of distributing the crash moment to different lower body members.
In one embodiment of the present invention, the beam connecting portion 10 is provided with three side panel portions, namely, a first side panel portion 101, a second side panel portion 102 and a third side panel portion 103, the first side panel portion 101, the second side panel portion 102 and the third side panel portion 103 are sequentially connected, an obtuse angle is formed between the adjacent side panel portions, the three side panel portions of the beam connecting portion 10 are welded to the middle floor front beam 4, the bottom panel 104 is connected to the side panel 12 in a riveted manner, and the side panel 12 transmits the collision force to the middle floor front beam 4 and the non-collision side through the structure during a side collision.
In one embodiment of the invention, both ends of the middle floor second cross beam 5 and the middle floor middle cross beam 6 are connected with the side plates 12 through the connecting plates 11, the connecting plates 11 are arched or U-shaped, and both side edges of the connecting plates 11 are also connected with the chassis. Specifically, a first protrusion 111, a second protrusion 112, and a third protrusion 113 are respectively provided at one end face of the connection plate 11 near the side plate 12, the first protrusion 111, the second protrusion 112, and the third protrusion 113 are connected to the side plate 12 by caulking, and a reinforcing rib structure is provided on the second protrusion 112 to increase the supporting strength. Two protruding parts are respectively arranged on two side edges of the connecting plate 11, and the vehicle chassis is taken as a direction reference, wherein a first side edge of the connecting plate 11 is provided with a fifth protruding part 115 and a fourth protruding part 114 from inside to outside in sequence, and a second side edge of the connecting plate 11 is provided with a sixth protruding part 116 and a seventh protruding part 117 from inside to outside. The fourth and seventh protrusions 114 and 117 are welded to the side plate 12, and the fifth and sixth protrusions 115 and 116 are connected to the main plate 13. The side collision force is transmitted through the side plate 12 by this structure.
In one embodiment of the present invention, the collision force is transmitted to the front floor and the lower middle floor beam structure through the side plates 12 in the side collision, wherein the supporting action of the middle floor front beam 4, the middle floor second beam 5, the middle floor middle beam 6, the front floor connecting bracket 15 and the lower front floor beam 14 can secure the compression space of the side collision, thereby reducing the injury to the occupants in the vehicle. While at the same time further enhancing the deformation resistance of the chassis. The stability of the structure in collision is ensured, and in the embodiment, a middle floor middle supporting beam 7 is arranged between a middle floor middle cross beam 6 and a chassis back beam 8, and the middle floor middle cross beam 6 is vertically connected with the middle floor middle cross beam 6 and the chassis back beam 8.
In particular, the invention also discloses a vehicle comprising the lower vehicle body structure.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (7)
1. A lower vehicle body structure, characterized by comprising:
the chassis is provided with threshold on two sides;
the plurality of cross beams are arranged on the chassis at intervals, and at least one cross beam is connected with the doorsill through a cross beam connecting part;
the longitudinal beams are arranged on the chassis at intervals, at least two longitudinal beams in the longitudinal beams extend to the threshold position of the chassis and intersect at least one of the transverse beams to absorb part of collision energy in a deformation mode, and the longitudinal beams extending to the threshold position of the chassis are connected with the threshold through a front floor connecting bracket so as to digest part of collision kinetic energy;
the chassis comprises a main board and side boards connected to two sides of the main board, and the beam connecting part is connected with the upper surface, the lower surface and the side boards of the main board to digest part of collision kinetic energy;
the plurality of longitudinal beams comprise underfloor longitudinal beams, the plurality of cross beams comprise front floor cross beams, front underfloor cross beams and middle underfloor front cross beams, the underfloor longitudinal beams are connected with the side plates through the front floor connecting brackets, two ends of the underfloor longitudinal beams are respectively connected with the front floor cross beams and the middle underfloor front cross beams, and the front floor connecting brackets and the front underfloor cross beams are staggered;
the beam connection portion includes:
a housing connecting the at least one cross member, the upper surface of the chassis, and the threshold;
the first supporting plate is arranged in the shell and is connected with the threshold;
the second supporting plate is arranged in the shell and is connected with the lower surface of the side plate;
and the third support plate is arranged in the shell and is connected with the side plate.
2. The lower body structure of claim 1, wherein the housing includes a bottom panel and a side panel connected to the bottom panel, the bottom panel and the side panel forming a cavity therebetween for receiving the first, second, and third support panels.
3. The lower body structure of claim 2, wherein the side panels include a plurality of side panel portions connected in series, adjacent side panel portions being at an obtuse angle.
4. The lower body structure according to claim 1, wherein two ends of at least one of the plurality of cross members are connected to the edge region of the chassis by a connecting plate, the connecting plate is arched or U-shaped, one of two end surfaces of the connecting plate is connected to the at least two cross members extending to the threshold position of the chassis, and the other end is connected to the threshold.
5. The lower body structure of claim 4, wherein both side edges of the connecting plate are further connected to the chassis.
6. The lower body structure according to claim 1, wherein the front floor connecting bracket is connected to the rocker by riveting and bonding, and the cross member connecting portion is connected to the rocker by riveting and bonding.
7. A vehicle comprising the lower body structure according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641101.1A CN114906229B (en) | 2022-06-07 | 2022-06-07 | Lower car body structure and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641101.1A CN114906229B (en) | 2022-06-07 | 2022-06-07 | Lower car body structure and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114906229A CN114906229A (en) | 2022-08-16 |
| CN114906229B true CN114906229B (en) | 2023-07-11 |
Family
ID=82770701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210641101.1A Active CN114906229B (en) | 2022-06-07 | 2022-06-07 | Lower car body structure and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114906229B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274329A (en) * | 2015-06-12 | 2017-01-04 | 上汽通用五菱汽车股份有限公司 | A kind of leaf spring front support seat mounting assembly |
| CN211731575U (en) * | 2020-03-04 | 2020-10-23 | 东风小康汽车有限公司重庆分公司 | Side wall structure and vehicle |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205131387U (en) * | 2015-11-20 | 2016-04-06 | 广州汽车集团股份有限公司 | Lower automobile body frame construction |
| DE102016223216A1 (en) * | 2016-11-23 | 2018-05-24 | Volkswagen Aktiengesellschaft | Body floor structure for a vehicle |
| CN108001537A (en) * | 2017-03-31 | 2018-05-08 | 长城汽车股份有限公司 | Vehicle body and vehicle |
| CN109204557B (en) * | 2017-06-30 | 2021-11-12 | 比亚迪股份有限公司 | Vehicle body structure and vehicle |
| CN109204470B (en) * | 2017-06-30 | 2020-07-10 | 比亚迪股份有限公司 | Vehicle body structure and vehicle |
| KR102607730B1 (en) * | 2019-01-14 | 2023-11-30 | 현대자동차주식회사 | Side sill structure of vehicle with opposite sliding door |
| CN211308727U (en) * | 2019-12-16 | 2020-08-21 | 北京车和家信息技术有限公司 | Chassis assembly, vehicle body structure and vehicle |
| CN112937697B (en) * | 2021-03-18 | 2022-08-26 | 东风柳州汽车有限公司 | Longeron additional strengthening and car |
| CN113147910B (en) * | 2021-05-08 | 2023-03-31 | 大运汽车股份有限公司 | Threshold reinforcing plate structure |
-
2022
- 2022-06-07 CN CN202210641101.1A patent/CN114906229B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274329A (en) * | 2015-06-12 | 2017-01-04 | 上汽通用五菱汽车股份有限公司 | A kind of leaf spring front support seat mounting assembly |
| CN211731575U (en) * | 2020-03-04 | 2020-10-23 | 东风小康汽车有限公司重庆分公司 | Side wall structure and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114906229A (en) | 2022-08-16 |
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