CN109080710B - Automobile rear floor assembly structure - Google Patents
Automobile rear floor assembly structure Download PDFInfo
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- CN109080710B CN109080710B CN201810687939.8A CN201810687939A CN109080710B CN 109080710 B CN109080710 B CN 109080710B CN 201810687939 A CN201810687939 A CN 201810687939A CN 109080710 B CN109080710 B CN 109080710B
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- rear floor
- reinforcing rib
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 85
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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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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- 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 floor assembly structure which is used for solving the problems that pits are easily generated on a rear floor and the NVH performance of the rear floor is easily caused when a functional part is installed on the existing rear floor assembly, and improving the safety and the comfort of the whole automobile. The structure comprises a rear floor body, and further comprises a rear longitudinal beam, a middle cross beam and a middle reinforcing beam which are arranged on the back surface of the rear floor body, wherein the cross sections of the rear longitudinal beam, the middle cross beam and the middle reinforcing beam are in a shape like a Chinese character 'ji', the rear longitudinal beams are symmetrically arranged on two sides of the rear floor body in pairs, two ends of the middle cross beam are respectively connected with the middle part of the rear longitudinal beam, the rear longitudinal beam and the middle cross beam are connected to form a shape like a Chinese character 'gong', and one end of the middle reinforcing beam is lapped on the side surface of the middle cross beam.
Description
Technical Field
The invention relates to the technical field of automobile body-in-white structures, in particular to an automobile rear floor assembly structure.
Background
The rear floor assembly is a part of a body-in-white framework and has a bearing function. When workers assemble and partially install some functional parts on the rear floor, if the floor is designed to be weaker or force transmission is unbalanced at a certain position, pits are easy to generate on the floor, and therefore serious quality problems are caused. Moreover, when the rear floor bears the excitation from the road surface and the engine, if the rear floor is improperly designed, resonance is easy to generate, so that the NVH performance of the whole vehicle is reduced, and the safety and the comfort of the whole vehicle are reduced. Moreover, most of the existing floor assembly structures are weak and are attached with reinforcing plates at related positions, so that unbalanced force transmission design is caused, and the weight is increased. In order to improve the product competitiveness, manufacturers shorten the development period and reduce the development cost on the basis of meeting various performances of automobiles, and it is very important to design a mature assembly structure meeting the performance requirements of various directions.
Disclosure of Invention
The invention aims to provide an automobile rear floor assembly structure, which is used for solving the problems that pits are easily generated on a rear floor and the NVH performance of the rear floor is easily caused when a functional part is installed on the existing rear floor assembly, and improving the safety and the comfort of the whole automobile.
The automobile rear floor assembly structure provided by the invention comprises a rear floor body and is characterized by further comprising rear longitudinal beams, a middle cross beam and a middle reinforcing beam, wherein the rear longitudinal beams, the middle cross beam and the middle reinforcing beam are arranged on the back surface of the rear floor body, the cross sections of the rear longitudinal beams, the cross sections of the middle cross beam and the cross sections of the middle reinforcing beam are in a shape like a Chinese character 'ji', the rear longitudinal beams are symmetrically arranged on two sides of the rear floor body in pairs, two ends of the middle cross beam are respectively connected with the middle part of the rear longitudinal beams, the rear longitudinal beams and the middle cross beam are connected to form an I shape, and one end of the middle reinforcing beam is lapped.
Furthermore, the connecting point of the middle reinforcing beam and the middle cross beam is located at 1/5-1/2 of the distance between the rear longitudinal beams. The installation position of the middle reinforcing beam can be freely selected according to the vehicle type.
Further, when the connecting point of the middle reinforcing beam and the middle cross beam is located at a position less than 1/2 of the distance between the pair of rear longitudinal beams, the middle cross beam and the middle reinforcing beam divide the back surface of the rear floor body into three regions, namely a rear region with a larger area, a rear region with a smaller area and a front region, the rear region is provided with a strip-shaped groove and a reinforcing rib with a counter sink portion, the rear region is provided with an H-shaped groove along the vehicle length direction, and the front region is provided with a strip-shaped groove and a reinforcing rib with a counter sink portion, the strip-shaped groove and the reinforcing rib are arranged along the vehicle length direction. For the rear two areas of the rear floor with smaller area, an H-shaped groove mode can be adopted, and for the rear area and the front area of the rear floor with larger area, a combination mode of a strip-shaped groove and a reinforcing rib can be adopted, so that the rigidity and the treading strength of the rear floor can be improved, and the local mode of the floor can be improved.
Furthermore, the reinforcing ribs in the front area comprise a left reinforcing rib and a right reinforcing rib which are symmetrically arranged along the middle point of the width direction of the rear floor body, a left connecting groove is arranged between the left reinforcing rib and the reinforcing rib in the rear area, a right connecting groove is arranged between the right reinforcing rib and the H-shaped groove in the rear two areas, the front section of the left connecting groove is connected with the left reinforcing rib through a left communicating groove arranged in the vehicle width direction, and the rear end of the left connecting groove is connected with the reinforcing rib in the rear area through a left arc-shaped groove; the front section of the right connecting groove is connected with the right reinforcing rib through a right communicating groove arranged in the vehicle width direction, and the rear end of the right connecting groove is connected with the long edge of the H-shaped groove along the vehicle length direction through a right arc-shaped groove. Such structure can make regional enhancement recess and strengthening rib before the back floor can link up with the regional enhancement recess and the strengthening rib in back floor back and two regions behind the back floor through the connecting groove respectively to left connecting groove and right connecting groove and coupling part actually form a pair of relative setting similar "halberd" font and strengthen the connecting groove, and the middle section of connecting groove is supported by the intermediate beam, anti resonance performance when promotion back floor that can to a great extent bears the excitation from road surface and engine promotes the NVH performance of whole car.
Furthermore, a middle reinforcing groove is formed between the left reinforcing rib and the right reinforcing rib, and the rear section of the middle reinforcing groove extends to the rear area. The middle reinforcement groove is also used for reinforcing the strength and the mode of the rear floor.
Furthermore, the joint of the rear longitudinal beam and the middle cross beam is connected through a lap joint cross beam, and the lap joint cross beam comprises a lap joint surface for lapping with the bottom surface of the rear longitudinal beam and a lap joint section matched with the cladding in shape of the bottom of the middle cross beam. The lap joint cross beam can effectively improve the strength of the joint of the middle cross beam and the rear longitudinal beam under the condition of ensuring the NVH performance of the rear floor assembly.
Furthermore, a reinforcing plate is arranged on the joint surface of the middle part of the middle cross beam and the rear floor body. The reinforcing plate of this department is little sheet metal component, generally sets up the concentric mounting hole with back floor mounting hole on this reinforcing plate during the application, and during the installation, this reinforcing plate laminates and installs at the middle part of middle cross beam with the bottom of back floor body, and the intensity of local mounting point is effectively strengthened in the installation of other parts of mainly used.
Furthermore, a rear small longitudinal beam matched with the bottom surface of the rear longitudinal beam in shape is lapped on the bottom surface of the rear section of the rear longitudinal beam. The rear small longitudinal beam is mainly used for reinforcing the strength of a connecting point of the rear longitudinal beam and the rear part of a vehicle body.
The automobile rear floor assembly structure has the following beneficial effects:
1. the automobile rear floor assembly has reasonable structural design and layout, reasonable process and convenient manufacture, is suitable for platformization and modularization, shortens the development period and reduces the production cost;
2. the structure design of the invention is reliable, the frame structure can effectively improve the rigidity and greatly improve the NVH performance, thereby improving the reliability, the safety and the comfort of the whole vehicle and leading the product to have more market competitiveness;
3. the frame structure divides the rear floor body into a front area, a rear area and a rear area, and the areas with different areas are respectively processed by adopting H-shaped reinforced grooves or reinforced ribs or combination thereof, so that the rigidity and the treading strength of the rear floor can be effectively improved, and the local mode of the floor is improved;
4. the reinforcing ribs or the reinforcing grooves in the front area can be connected with the reinforcing ribs or the reinforcing grooves in the rear area and the rear two areas through the communication grooves, and the communication grooves are supported by the middle cross beam, so that when the rear floor bears excitation from a road surface and an engine, resonance is reduced, and the NVH performance of the whole vehicle is improved;
5. the joint of the rear longitudinal beam and the middle transverse beam is provided with the lap joint transverse beam, the bottom surface of the rear section of the rear longitudinal beam is provided with the rear small longitudinal beam, the middle part of the middle transverse beam and the binding surface of the rear floor body are provided with the reinforcing plate, so that the joint of each part of the rear floor assembly can improve the connection strength under the condition of ensuring the NVH performance, and the requirement of connection tolerance is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the structure of the present invention in the direction A.
Fig. 3 is an exploded view of the invention in view a.
In which the figures are as follows: 1. a rear floor body; a. the latter region; a1, strip-shaped grooves; a2, reinforcing ribs; b. the second two areas; b1, a groove in the shape of an H; c. a front region; c1, strip-shaped grooves; c21, a left reinforcing rib; c22, right reinforcing ribs; m, a middle groove; p1, left connecting groove; p11, left connecting groove; p12, left arc groove; p2, right connecting groove; p21, right connecting groove; p22, right arc groove; 2. A rear stringer; 3. a middle cross beam; 4. a middle stiffening beam; 5. overlapping the cross beams; 51. a lapping surface; 52. a lap joint section; 6. a reinforcing plate; 7. and a rear small longitudinal beam.
Detailed Description
The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.
Referring to fig. 1-3, the automobile rear floor assembly structure of the present invention includes a rear floor body 1, and further includes a rear longitudinal beam 2, a middle cross beam 3 and a middle reinforcing beam 4 which are disposed on the back surface of the rear floor body 1, the cross sections of the rear longitudinal beam 2, the middle cross beam 3 and the middle reinforcing beam 4 are all in a shape like a Chinese character ji, the rear longitudinal beams 2 are arranged on two sides of the rear floor body 1 in pairs and symmetrically, two ends of the middle cross beam 3 are respectively connected with the middle portion of the rear longitudinal beam 2, the rear longitudinal beam 2 and the middle cross beam 3 are connected to form a shape like a Chinese character "i", and one end of the middle reinforcing beam 3 is lapped on the side.
In a preferred embodiment, the connection point of the middle reinforcing beam 4 and the middle cross beam 3 is located at 1/5-1/2 of the distance between the rear longitudinal beams 2. The mounting position of the middle reinforcing beam can be freely selected according to the vehicle type, and the embodiment is 1/3.
Preferably, when the connection point of the middle reinforcing beam 4 and the middle cross beam 3 is located at a position less than 1/2 of the distance between the pair of rear side members 2, the middle cross beam 3, and the middle reinforcing beam 4 divide the rear surface of the rear floor body 1 into three regions, i.e., a rear region a having a large area, a rear region b having a small area, and a front region c, the rear region a is provided with a strip-shaped groove a1 and a rib a2 having a counter sink portion, the rear region b is provided with a groove b1 having an "H" shape in the vehicle length direction, and the front region c is provided with a strip-shaped groove c1 and a rib having a counter sink portion, which are provided in the vehicle length direction. For the rear two areas b of the rear floor with smaller area, an H-shaped groove mode can be adopted, and for the rear area a and the front area c of the rear floor with larger area, a combination mode of a strip-shaped groove and a reinforcing rib can be adopted, so that the rigidity and the treading strength of the rear floor can be improved, and the local mode of the floor can be improved.
Preferably, the reinforcing ribs in the front area c include a left reinforcing rib c21 and a right reinforcing rib c22 which are symmetrically arranged along the middle point of the width direction of the rear floor body 1, a left connecting groove P1 is arranged between the left reinforcing rib c21 and the reinforcing rib a2 in the rear area a, a right connecting groove P2 is arranged between the right reinforcing rib c22 and the groove b1 in the shape of "H" in the rear two areas, the front section of the left connecting groove P1 is connected with the left reinforcing rib c21 through a left communicating groove P11 arranged in the vehicle width direction, and the rear end of the left connecting groove P1 is connected with the reinforcing rib a2 in the rear area a through a left arc-shaped groove P12; the front section of the right connecting groove P2 is connected with the right bead c22 through a right communicating groove P21 provided in the vehicle width direction, and the rear end of the right connecting groove P2 is connected with the long side of the H-shaped groove b1 along the vehicle length direction through a right arc-shaped groove P22. Such structure can make regional c's behind the floor strengthen recess and strengthening rib behind the back floor in front of the area a and the back floor behind two regional b strengthen recess and strengthening rib respectively through the connecting groove contact and communicate to left connecting groove and right connecting groove and coupling part actually form a pair of relative setting similar "halberd" font strengthen connecting groove, and the middle section of connecting groove is supported by middle cross beam 3, anti resonance performance when promotion back floor that can to a great extent bears the excitation from road surface and engine, promote the NVH performance of whole car.
Preferably, a middle reinforcement groove M is provided between the left bead c21 and the right bead c22, and a rear section of the middle reinforcement groove M extends to the rear region a. The middle reinforcement groove M is also used to reinforce the strength and mode of the rear floor.
Preferably, the connection between the rear longitudinal beam 2 and the middle cross beam 3 is connected by a lap cross beam 5, and the lap cross beam 5 includes a lap surface 51 for overlapping the bottom surface of the rear longitudinal beam 2 and a lap section 52 adapted to the shape of the bottom of the middle cross beam 3. The lap joint cross beam 5 can effectively improve the strength of the joint of the middle cross beam 3 and the rear longitudinal beam 2 under the condition of ensuring the NVH performance of the rear floor assembly.
Preferably, the joint surface of the middle part of the middle cross beam 3 and the rear floor body 1 is provided with a reinforcing plate 6. Reinforcing plate 6 of this department is little sheet metal component, generally sets up the concentric mounting hole with back floor mounting hole on this reinforcing plate 6 during the application, and during the installation, this reinforcing plate 6 and the laminating of the bottom of back floor body 1 and install in the middle part of middle cross beam 3, and the intensity of local mounting point is effectively strengthened in the installation of other parts of mainly used.
Preferably, a rear small longitudinal beam 7 matched with the shape of the bottom surface of the rear longitudinal beam 2 is lapped on the bottom surface of the rear section of the rear longitudinal beam 2. The rear side member 7 is mainly used for reinforcing the strength of the joint between the rear side member 2 and the rear portion of the vehicle body.
Claims (5)
1. An automobile rear floor assembly structure comprises a rear floor body, and is characterized by further comprising rear longitudinal beams, middle cross beams and middle reinforcing beams, wherein the rear longitudinal beams, the middle cross beams and the middle reinforcing beams are arranged on the back face of the rear floor body, the cross sections of the rear longitudinal beams, the middle cross beams and the middle reinforcing beams are in a shape like a Chinese character 'ji', the rear longitudinal beams are symmetrically arranged on two sides of the rear floor body in pairs, two ends of each middle cross beam are respectively connected with the middle of each rear longitudinal beam, the rear longitudinal beams and the middle cross beams are connected to form an 'I' shape, one end of each middle reinforcing beam is connected to the side face of each middle cross beam in a lap joint mode, connecting points of the middle reinforcing beams and the middle cross beams are located at 1/5-1/2 of the distance between the rear longitudinal beams, and when the connecting points of the middle reinforcing beams and the middle cross, the rear longitudinal beam, the middle cross beam and the middle reinforcing beam divide the back surface of the rear floor body into three areas, namely a rear area with a larger area, a rear area with a smaller area and a front area, the rear area is provided with a strip-shaped groove arranged along the vehicle length direction and a reinforcing rib with a counter sink part, the rear area is provided with an H-shaped groove along the vehicle length direction, the front area is provided with a strip-shaped groove arranged along the vehicle length direction and a reinforcing rib with a counter sink part, the reinforcing rib of the front area comprises a left reinforcing rib and a right reinforcing rib which are symmetrically arranged along the width direction midpoint of the rear floor body, a left connecting groove is arranged between the left reinforcing rib and the reinforcing rib of the rear area, a right connecting groove is arranged between the right reinforcing rib and the H-shaped groove of the rear area, and the front section of the left connecting groove is connected with the left reinforcing rib through a left communicating groove arranged in the vehicle width direction, the rear end of the left connecting groove is connected with the reinforcing rib in the next area through the left arc-shaped groove; the front section of the right connecting groove is connected with the right reinforcing rib through a right communicating groove arranged in the vehicle width direction, and the rear end of the right connecting groove is connected with the long edge of the H-shaped groove along the vehicle length direction through a right arc-shaped groove.
2. The vehicle rear floor assembly structure according to claim 1, wherein a middle reinforcement groove is provided between the left reinforcing bead and the right reinforcing bead, and a rear section of the middle reinforcement groove extends to the latter area.
3. The automobile rear floor assembly structure according to claim 1 or 2, characterized in that the junction of the rear side member and the middle cross member is connected by a lap cross member including a lap surface for overlapping with the bottom surface of the rear side member and a lap section adapted to the shape of the bottom of the middle cross member with the cladding.
4. The automobile rear floor assembly structure according to claim 3, characterized in that a reinforcement plate is provided to a joint surface of a middle portion of the middle cross member and the rear floor body.
5. The vehicle rear floor assembly structure according to claim 4, wherein a rear small side member that is matched in shape to a bottom surface of the rear side member is lapped on a bottom surface of a rear section of the rear side member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687939.8A CN109080710B (en) | 2018-06-28 | 2018-06-28 | Automobile rear floor assembly structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687939.8A CN109080710B (en) | 2018-06-28 | 2018-06-28 | Automobile rear floor assembly structure |
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| Publication Number | Publication Date |
|---|---|
| CN109080710A CN109080710A (en) | 2018-12-25 |
| CN109080710B true CN109080710B (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810687939.8A Active CN109080710B (en) | 2018-06-28 | 2018-06-28 | Automobile rear floor assembly structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6988835B2 (en) * | 2019-01-23 | 2022-01-05 | マツダ株式会社 | Rear body structure |
| CN113306634A (en) * | 2021-07-09 | 2021-08-27 | 安徽江淮汽车集团股份有限公司 | Floor structure behind small-size car GMT |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100462682B1 (en) * | 2002-09-17 | 2004-12-20 | 현대자동차주식회사 | Floor reinforcement structure of Recreational Vehicle |
| US7310878B2 (en) * | 2004-02-27 | 2007-12-25 | Gm Global Technology Operations, Inc. | Automotive lower body component method of manufacture |
| CN100590021C (en) * | 2006-08-14 | 2010-02-17 | 上海华普汽车有限公司 | Automobile body rear floor device |
| DE102012006527A1 (en) * | 2012-03-29 | 2013-10-02 | GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) | Floor structure of a motor vehicle body |
| CN103192888B (en) * | 2013-01-07 | 2015-09-09 | 浙江吉利汽车研究院有限公司杭州分公司 | A kind of vehicle body floor structure |
| CN103612667B (en) * | 2013-12-09 | 2016-08-31 | 重庆长安汽车股份有限公司 | Rear floor structure |
| DE102015206986B3 (en) * | 2015-04-17 | 2016-07-28 | Volkswagen Aktiengesellschaft | Component assembly of a motor vehicle body with a supporting structure |
| CN107487384B (en) * | 2016-07-15 | 2020-08-18 | 宝沃汽车（中国）有限公司 | Rear floor, rear floor structure assembly and automobile |
| CN206218027U (en) * | 2016-10-25 | 2017-06-06 | 上汽通用五菱汽车股份有限公司 | A kind of body platform stiffener assembly |
| CN207389328U (en) * | 2017-05-23 | 2018-05-22 | 北京汽车股份有限公司 | For the floor of vehicle and with its vehicle |
| CN207015453U (en) * | 2017-06-12 | 2018-02-16 | 奇瑞汽车股份有限公司 | A kind of front floor body structure of vehicle |
| CN210139868U (en) * | 2019-05-16 | 2020-03-13 | 中车唐山机车车辆有限公司 | Luggage rack mounting seat and rail vehicle |
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2018
- 2018-06-28 CN CN201810687939.8A patent/CN109080710B/en active Active
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