CN106494511B - Automobile rear girder assembly and automobile rear lower body structure - Google Patents
Automobile rear girder assembly and automobile rear lower body structure Download PDFInfo
- Publication number
- CN106494511B CN106494511B CN201611071420.4A CN201611071420A CN106494511B CN 106494511 B CN106494511 B CN 106494511B CN 201611071420 A CN201611071420 A CN 201611071420A CN 106494511 B CN106494511 B CN 106494511B
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- girder
- automobile
- rear girder
- floor
- inner plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D23/00—Combined superstructure and frame, i.e. monocoque constructions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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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
The invention provides an automobile rear girder assembly and an automobile rear lower body structure, and belongs to the field of automobile part structures. The rear girder assembly comprises a rear girder and a rear girder inner plate which are fixedly connected, wherein the rear girder and the rear girder inner plate form a hollow cavity, the rear girder comprises a rear girder front part which is in lap joint with a vehicle cross beam three and a rear girder rear part which is in lap joint with a rear floor, and the height of the rear girder rear part from the ground is larger than that of the rear girder front part from the ground. The beneficial effects of the invention are as follows: the rear part of the rear girder is lifted up to give up the space to arrange an oil tank oil filling pipe and an exhaust pipe cylinder body, so that the space is maximally utilized when the strength, the rigidity and the safety requirement of a collision fuel system behind a passenger car are met; the rear girder inner plate is added above the rear girder, so that a large closed cavity is formed between the rear girder and the rear girder, the bearing capacity of the whole vehicle is improved, and the rear girder can bear larger acting force when being impacted.
Description
Technical Field
The invention relates to an automobile part structure, in particular to an automobile rear girder assembly, and also relates to an automobile rear lower body structure comprising the automobile rear girder assembly.
Background
At present, on the rear lower car body of many passenger cars, a frame structure is formed by arranging girders on two sides and arranging a plurality of cross beams between the girders, and then a floor is covered on the frame, so that the girders, the cross beams and the floor weld parts together through a welding process, and a closed cavity loop structure is formed on the whole rear lower car body, so that the rear lower car body can have good bearing capacity. The rear lower vehicle body can meet the requirements of structural strength, rigidity and related regulations while meeting the arrangement of parts such as rear suspension, an oil tank assembly, an exhaust pipe assembly, seat installation and the like.
The structure is widely applied to the body of a passenger car and has the advantages of simple structure, mature technology, easy development and lower production process requirement; the structure can easily meet various performances of the whole vehicle by enlarging the cavity of the girder and increasing the number of the cross beams.
However, the vehicle body of the whole vehicle is relatively high, the utilization rate of the space of the whole vehicle is low, and the counterweight of the whole vehicle is increased, and in addition, the following problems are also caused:
(1) The distance between the exhaust pipe cylinder and the rear girder is too short, the distance from the exhaust pipe cylinder to the floor is too small, and the arrangement of the oil injection pipe is too low, so that the oil injection is affected;
(2) The rear girder has small section, such as being directly overlapped with the floor, small cavity, small bearing capacity and insufficient strength;
(3) The lap joint of the rear girder inner plate and the side wall has high stress and low torsional rigidity;
(4) Because the spare tire is placed in the vehicle body and is full-size, the forming depth of the spare tire pit reaches 208MM, and the stamping forming difficulty is high;
(5) The third row of seat mounting points are arranged on the third beam, so that the strength is not enough; because the three cavities of the rear floor beam are small, the torsional rigidity is low, and when the reinforcing beam is added on the floor, high stress exists after the reinforcing beam is overlapped with the rear floor inner plate;
(6) The original reference other vehicle types are used for welding the rear floor extension piece upwards and the side wall, but the side wall and the ground rear plate extension piece form a closed cavity, so that welding robbery cannot be welded, and the side wall skirt edge cannot be lifted upwards due to the arrangement limitation of the pressure relief valve;
(7) The rear floor extension part is large, after the whole rear lower car body assembly is welded, the rear floor extension part is easy to deform in the transportation process and under the action of external force, and the rear floor extension part is poor in matching performance when being welded with the side wall.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an automobile rear girder assembly and also provides an automobile rear lower body structure comprising the automobile rear girder assembly.
The rear girder assembly comprises a rear girder and a rear girder inner plate which are fixedly connected, wherein the rear girder and the rear girder inner plate form a hollow cavity, the rear girder comprises a rear girder front part which is in lap joint with a vehicle cross beam three and a rear girder rear part which is in lap joint with a rear floor, and the height of the rear girder rear part from the ground is larger than that of the rear girder front part from the ground.
The invention further improves and also comprises a rear girder reinforcing plate, wherein the rear girder reinforcing plate is fixed at one side of the rear girder, which is close to the inner plate of the rear girder.
According to the invention, a rear wheel cover inner plate reinforcing plate is further arranged on the rear girder assembly, one end of the rear wheel cover inner plate reinforcing plate is connected with the rear wheel cover inner plate, and the other end of the rear wheel cover inner plate reinforcing plate is fixedly connected with the rear girder inner plate.
According to the invention, the number of the reinforcing plates of the inner plate of the rear wheel cover is four, two reinforcing plates are arranged on each side of the automobile rear girder assembly, and the reinforcing plates are symmetrically distributed on the automobile rear girder assemblies on the left side and the right side.
The invention is further improved, and the distance between the rear parts of the rear longerons on the left side and the right side of the automobile is larger than that between the front parts of the rear longerons.
The invention is further improved, and the rear part of the rear girder moves outwards by 30mm towards the outer side of the automobile.
The invention is further improved in that the rear part of the rear girder is raised by 17mm in the Z direction compared with the front part of the rear girder.
The invention also provides a lower automobile body structure at the rear part of the automobile, which comprises a beam III, an automobile rear floor fixedly connected with the beam III, and a rear floor upper beam, wherein the rear floor upper beam is fixed above the beam III, and two ends of the rear floor upper beam, two ends of the beam III and two sides of the automobile rear floor are respectively overlapped with rear girder inner plates at the left side and the right side of the automobile.
According to the invention, the rear floor upper cross beam is provided with a third row of seat front foot mounting points, and the third row of seat front foot mounting points are provided with reinforcing plates.
The automobile rear floor further comprises rear floor extending members which are respectively arranged at the left side and the right side of the rear end of the rear floor, one end of each rear floor extending member is fixedly connected with the side wall outer plate, the other end of each rear floor extending member is fixedly connected with the rear girder, a rear floor extending member reinforcing plate is arranged on the inner side of each rear floor extending member, and one end of each floor extending member reinforcing plate is fixed between each rear floor extending member and each rear girder.
Compared with the prior art, the invention has the beneficial effects that: the rear part of the rear girder is lifted up to give up the space to arrange an oil tank oil filling pipe and an exhaust pipe cylinder body, so that the space is maximally utilized when the strength, the rigidity and the safety requirement of a collision fuel system behind a passenger car are met; a rear girder inner plate is added above the rear girder, so that a large closed cavity is formed between the rear girder and the rear girder, the bearing capacity of the whole vehicle is improved, and the rear girder inner plate can bear larger acting force when being impacted; 4 reinforcing plates of the inner plate of the rear wheel cover are arranged at the rear wheel cover, so that the frame and the side wall form a cavity structure to be connected, and the structure forms a stronger force transmission loop, thereby improving torsional rigidity; the rear part of the rear girder is outwards enlarged by 30mm, the outwards enlarged space enables the draft angle of the spare tire cabin pit to be increased, so that the stamping, stretching and material removal are smoother, and the stamping formability of the part is improved; the upper cross beam of the rear floor is added above the cross beam of the rear floor, and the two cross beams form a large cavity structure, so that the bearing capacity of the cross beam is improved, and finally the purposes of improving the strength and the rigidity are achieved; the outer part of the rear floor extension piece is inclined downwards and bent downwards to overlap with the side wall, so that the requirement of a welding process is met; the reinforcing plate of the rear floor extension piece is added, so that the reinforcing plate is connected with the rear floor extension piece and the rear girder connecting piece through spot welding, and the local strength of the parts is improved through the connection of three parts; the problem that the rear floor extension piece is easy to deform in the transportation process and under the action of external force is avoided, the matching property of the rear floor extension piece and the side wall during welding is improved, and the quality of a vehicle body is improved.
Drawings
FIG. 1 is a schematic diagram of an automotive rear frame assembly;
FIG. 2 is an enlarged cross-sectional view of A-A of FIG. 1;
FIG. 3 is a schematic view of a combination structure of a rear frame assembly and a partial side wall of an automobile;
FIG. 4 is an enlarged cross-sectional view of B-B of FIG. 3;
FIG. 5 is a top view of FIG. 1;
FIG. 6 is a schematic diagram of an automotive floor assembly;
FIG. 7 is a schematic view of a partial structure of a rear floor extension on the left side of an automobile;
FIG. 8 is a cross-sectional view of FIG. 7D-D;
FIG. 9 is a schematic view of the structure of the rear floor extension on the right side of the automobile toward the bottom side;
FIG. 10 is a schematic view of an exploded and force-transmitting structure of the rear floor assembly.
Detailed Description
The invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 1 and 2, the automobile rear girder assembly comprises a rear girder 1 and a rear girder inner plate 2 which are fixedly connected, wherein the rear girder inner plate 2 is welded above the rear girder 1, the cross sections of the rear girder inner plate and the rear girder inner plate are of semi-enclosed structures, the rear girder 1 and the rear girder inner plate 2 integrally form a large closed hollow cavity, the bearing capacity of the whole automobile is improved, the whole automobile can bear larger acting force when being impacted, and a rear girder reinforcing plate 3 is additionally arranged on one side, close to the rear girder inner plate 2, of the rear girder 1, so that the rigidity of the whole automobile rear girder assembly is improved.
The rear girder 1 of this example sets up the rear end at front girder 13, including with the rear girder front portion 102 of three overlap joints of crossbeam, with the rear girder rear portion 101 of back floor 9 overlap joint, the height of rear girder rear portion 101 is greater than the height of rear girder front portion 102 from ground, the rear girder rear portion 101 of this example is upwards raised 17mm relative to rear girder front portion 102, let the space arrange oil tank filler pipe and blast pipe barrel, make the installation of oil tank filler pipe upwards raise 17mm, the problem that oil filler pipe 15 was arranged lowerly has been satisfied, also make blast pipe 16 barrel upwards raise simultaneously, increased the distance from the ground, the collision fuel system safety requirement makes space maximize utilization behind satisfying intensity, rigidity and passenger car.
As shown in fig. 3 and 4, the rear girder assembly of the automobile is further provided with a rear wheel cover inner plate reinforcing plate 5, one end of the rear wheel cover inner plate reinforcing plate 5 is connected with the rear wheel cover inner plate 4, and the other end of the rear wheel cover inner plate reinforcing plate is fixedly connected with the rear girder inner plate 2. The number of the reinforcing plates 5 of the inner plate of the rear wheel cover is four, two reinforcing plates are arranged on each side of the rear girder assembly of the automobile, and the reinforcing plates are symmetrically distributed on the rear girder assembly of the automobile on the left side and the right side. 4 reinforcing plates 5 of the inner plate of the rear wheel cover are arranged at the rear wheel cover, so that the frame and the side walls form a cavity structure to be connected, and the structure forms a strong force transmission loop, thereby improving torsional rigidity. The strength and rigidity of the weak force transmission area of the C part among the inner plate 4 of the rear wheel cover, the reinforcing plate 6 of the shock absorber and the automobile rear girder assembly are effectively improved.
As shown in fig. 5, in this example, the rear girder rear portion 101 is moved outward by 30mm relative to the rear girder front portion 102, so that the distance between the rear girder rear portions 101 on the left and right sides of the automobile is greater than the distance between the rear girder front portions 102, the draft angle of the spare tire cabin pits 17 between the rear girder rear portions 101 on the two sides of the automobile can be increased, the material stamping forming thinning rate is reduced, and the stamping forming process is satisfied, so as to meet the requirement of large space of spare tire positions in the automobile, thereby enabling the stamping stretching material removal to be smoother, and improving the stamping formability of parts.
As shown in fig. 6 and 10, this example also provides a lower car body structure at the rear part of a car including the rear girder assembly of the car, which comprises a third beam 14, a rear floor 9 fixedly connected with the third beam, and a rear floor upper beam 7, wherein the rear floor upper beam 7 is fixed above the third beam and forms a cavity structure with the third beam, thereby improving the bearing capacity of the beam, and finally achieving the purposes of improving the strength and the rigidity and improving the torsional rigidity of the whole car. The two ends of the upper cross beam 7 of the rear floor, the two ends of the cross beam III and the two sides of the rear floor 9 of the automobile are respectively overlapped with the rear girder inner plates 2 on the left side and the right side of the automobile in a welding mode, and an arrow in fig. 10 represents a stress transmission schematic diagram of the automobile, so that the stress of the frame structure of the automobile is transmitted to the direction of the whole automobile, the stress and torsion resistance of the whole automobile are improved, and the strength and rigidity of the whole automobile are further improved.
The rear floor upper beam 7 is provided with a third row of seat front foot mounting points 71, and the third row of seat front foot mounting points 71 are provided with U-shaped reinforcing plate fixing parts 8. The third row of seat front feet are arranged on the floor upper cross beam 7, so that the problem of insufficient assembly space of seat mounting points is solved. Two U-shaped reinforcing plates are added in the rear floor upper cross beam 7 for reinforcing the seat mounting points, so that the strength requirement of the seat mounting points is met.
As shown in fig. 7-9, the rear floor 9 of the present embodiment of the automobile further includes rear floor extension members 10 respectively disposed on left and right sides of a rear end of the rear floor 9, one end of the rear floor extension member 10 is fixedly connected with the side wall outer plate 12, the other end is fixedly connected with the rear girder 1, a rear floor extension member reinforcing plate 11 is disposed on an inner side of the rear floor extension member 10, and one end of the floor extension member reinforcing plate 11 is fixed between the rear floor extension member 10 and the rear girder 1.
In this example, the outer part of the rear floor extension 10 is inclined downwards, and the rib structure 1001 is added on the inclined surface and the downward folded edge, so that the strength of the rear floor extension 10 is increased, and the folded edge is formed downwards and overlapped with the side wall to meet the requirement of the welding process. The reinforcing plate 11 of the rear floor extension is added, so that the rear floor extension 10 and the rear girder 1 are connected together through spot welding, and a reinforcing wall structure is formed between the parts through the connection of three parts, so that the local strength is greatly improved. The welding technology solves the technical problem of welding the rear end of the rear floor 9 and the side wall outer plate 12, also avoids the problem that the rear floor extension piece 10 is easy to deform in the transportation process and under the action of external force, improves the matching property of the rear floor extension piece 10 and the side wall outer plate 12 during welding, and improves the quality of a vehicle body.
The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, which includes but is not limited to the embodiments, and equivalent modifications according to the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a crossbeam assembly behind car which characterized in that: including fixed connection's back girder and back girder inner panel, the cross section of back girder and back girder inner panel is half surrounding structure, hollow cavity is constituteed to back girder and back girder inner panel, back girder includes with the three lapped back girder front portion of car crossbeam, with the back girder rear portion of back floor lapped, the height of back girder rear portion distance from ground is greater than the height of back girder front portion distance from ground.
2. The automotive rear girder assembly according to claim 1, wherein: the rear girder reinforcing plate is fixed on one side of the rear girder, which is close to the inner plate of the rear girder.
3. The automotive rear girder assembly according to claim 2, wherein: the rear girder assembly is further provided with a rear wheel cover inner plate reinforcing plate, one end of the rear wheel cover inner plate reinforcing plate is connected with the rear wheel cover inner plate, and the other end of the rear wheel cover inner plate reinforcing plate is fixedly connected with the rear girder inner plate.
4. A rear girder assembly for an automobile according to claim 3, wherein: the number of the reinforcing plates of the inner plate of the rear wheel cover is four, two reinforcing plates are arranged on each side of the rear girder assembly of the automobile, and the reinforcing plates are symmetrically distributed on the rear girder assembly of the automobile on the left side and the right side.
5. The automotive rear girder assembly according to any one of claims 1 to 4, wherein: the distance between the rear parts of the rear longerons on the left side and the right side of the automobile is larger than that between the front parts of the rear longerons.
6. The automobile rear girder assembly according to claim 5, wherein: the rear part of the rear girder is outwards moved 30mm to the outer side of the automobile.
7. The automotive rear girder assembly according to any one of claims 1 to 4, wherein: the rear girder rear portion is raised 17mm in the Z-direction compared to the rear girder front portion.
8. A rear lower body structure of an automobile comprising the rear girder assembly of any one of claims 1 to 7, comprising a third cross member, a rear floor of the automobile fixedly connected with the third cross member, characterized in that: the automobile rear floor comprises a rear floor upper beam, wherein the rear floor upper beam is fixed above a beam III, and two ends of the rear floor upper beam, two ends of the beam III and two sides of an automobile rear floor are respectively overlapped with rear girder inner plates on the left side and the right side of the automobile.
9. The automobile rear lower body structure according to claim 8, characterized in that: the upper cross beam of the rear floor is provided with a third row of seat front foot mounting points, and the third row of seat front foot mounting points are provided with reinforcing plates.
10. The automobile rear lower body structure according to claim 8, characterized in that: the automobile rear floor further comprises rear floor extending pieces, the rear floor extending pieces are respectively arranged on the left side and the right side of the rear end of the rear floor, one end of each rear floor extending piece is fixedly connected with the side wall outer plate, the other end of each rear floor extending piece is fixedly connected with the rear girder, a rear floor extending piece reinforcing plate is arranged on the inner side of each rear floor extending piece, and one end of each floor extending piece reinforcing plate is fixed between the corresponding rear floor extending piece and the corresponding rear girder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611071420.4A CN106494511B (en) | 2016-11-29 | 2016-11-29 | Automobile rear girder assembly and automobile rear lower body structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611071420.4A CN106494511B (en) | 2016-11-29 | 2016-11-29 | Automobile rear girder assembly and automobile rear lower body structure |
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| Publication Number | Publication Date |
|---|---|
| CN106494511A CN106494511A (en) | 2017-03-15 |
| CN106494511B true CN106494511B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611071420.4A Active CN106494511B (en) | 2016-11-29 | 2016-11-29 | Automobile rear girder assembly and automobile rear lower body structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106926902B (en) * | 2017-04-01 | 2023-07-25 | 上汽通用五菱汽车股份有限公司 | Integral frame structure of tandem lap joint |
| CN108082300A (en) * | 2017-12-31 | 2018-05-29 | 东风小康汽车有限公司重庆分公司 | Automobile rear floor |
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| CN201390293Y (en) * | 2008-12-19 | 2010-01-27 | 奇瑞汽车股份有限公司 | Vehicle body reinforcing structure at bridging position of front floor and rear floor |
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| CN105365894A (en) * | 2015-11-12 | 2016-03-02 | 奇瑞汽车股份有限公司 | Vehicle body rear inclined strut structure |
| CN205256444U (en) * | 2015-11-23 | 2016-05-25 | 上汽通用汽车有限公司 | A stiffening beam assembly for connecting between floor behind automobile and back wheel casing |
| CN206307117U (en) * | 2016-11-29 | 2017-07-07 | 上汽通用五菱汽车股份有限公司 | Girder assembly and automobile rear lower body structure after a kind of automobile |
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2016
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003276643A (en) * | 2002-03-25 | 2003-10-02 | Nissan Motor Co Ltd | Car body rear part structure of automobile |
| CN201390293Y (en) * | 2008-12-19 | 2010-01-27 | 奇瑞汽车股份有限公司 | Vehicle body reinforcing structure at bridging position of front floor and rear floor |
| CN202863584U (en) * | 2012-09-17 | 2013-04-10 | 浙江吉利汽车研究院有限公司杭州分公司 | Connecting structure of automobile side body assembly and rear floor assembly |
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| CN104163206A (en) * | 2013-05-15 | 2014-11-26 | 广州汽车集团股份有限公司 | Vehicle rear floor longitudinal beam assembly and vehicle rear structure |
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| CN106494511A (en) | 2017-03-15 |
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