CN216546382U - A back longeron foundry goods structure for new energy automobile - Google Patents
A back longeron foundry goods structure for new energy automobile Download PDFInfo
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- CN216546382U CN216546382U CN202122907593.8U CN202122907593U CN216546382U CN 216546382 U CN216546382 U CN 216546382U CN 202122907593 U CN202122907593 U CN 202122907593U CN 216546382 U CN216546382 U CN 216546382U
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Abstract
The utility model discloses a rear longitudinal beam casting structure for a new energy automobile, which comprises a rear longitudinal beam body, wherein a plurality of reinforcing ribs for improving the collision performance are arranged in a cavity of the rear longitudinal beam body, the reinforcing ribs form a cavity net structure, and the cross points of the reinforcing ribs are provided with mold ejector pin pylons for reducing the hot spot effect on mold steel. The utility model provides a rear longitudinal beam casting structure for a new energy automobile, which improves the anti-collision performance of a rear longitudinal beam.
Description
Technical Field
The utility model relates to the technical field of automobile parts, in particular to a rear longitudinal beam casting structure for a new energy automobile.
Background
With the continuous popularization of new energy automobiles, people need to consider the requirements of light weight, performance improvement, integral die-casting forming and the like for the improvement of the requirements of riding comfort, battery collision safety and endurance mileage of the electric automobile, the rear longitudinal beam region is a main damaged part when the automobile is subjected to a reversing collision or rear-end collision accident, and the quality of the collision resistance directly determines the quality of the safety performance of the new energy automobile.
At present, the traditional automobile body rear longitudinal beam is formed by welding a plurality of steel plate stamping parts and then welded into a final rear longitudinal beam assembly through a tool fixture. Due to the fact that the number of parts is large, the weight is large, the tool and the welding process are complex, the welding precision is low, the welding strength is low, and the collision safety and the endurance mileage of the new energy automobile are not improved. The automobile rear longitudinal beam is an important part on an automobile body, when a rear-end collision occurs to an automobile, a battery pack is very easy to extrude and deform, so that the battery pack is damaged, a reinforcing plate needs to be added in a weak area of the rear longitudinal beam, a weakening rib is added at the tail part of the longitudinal beam, a stronger mounting bracket is used, and the measures of adjusting welding spots are adopted to optimize a rear longitudinal beam assembly and improve the collision energy-absorbing characteristic of the rear longitudinal beam assembly. Although the method improves the rear collision performance to a certain extent, the weight and the number of parts of the whole vehicle are increased, and accordingly, the welding precision of the vehicle body is low, the welding strength is weak, and the method is not beneficial to the light weight of the vehicle body, the optimization of the production rhythm of the whole vehicle and the improvement of the endurance mileage of the new energy vehicle.
For example, a "rear floor frame structure and automobile" disclosed in chinese patent literature, publication No. CN209008696U, includes a left/right rear side member assembly including a rear floor left front side member, a rear floor right front side member, a rear floor left rear side member, and a rear floor right rear side member, which are aluminum castings, and a plurality of cross members connected between the rear floor left front side member, the rear floor right front side member, the rear floor left rear side member, and the rear floor right rear side member. Compared with the prior art, the number and the weight of the parts of the rear floor frame structure are effectively reduced, and the splicing precision of the assembly structure is greatly improved. The defect is that the welding strength of the rear longitudinal beam casting structure is low, and the requirement on the rear collision performance of the new energy automobile is not met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that in the prior art, the number of parts of a rear longitudinal beam of an automobile body is large, the welding precision strength is low, and the collision safety and the mileage continuation of a new energy automobile are not facilitated to be improved, and provides a rear longitudinal beam casting structure for the new energy automobile, so that the collision resistance of the rear longitudinal beam is improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a back longeron foundry goods structure for new energy automobile, includes the back longeron body, the inside strengthening rib that is used for improving crash performance that is equipped with of cavity of back longeron body, a plurality of strengthening ribs vacuole formation network structure, the crosspoint of strengthening rib is equipped with the mould thimble stylobate that is used for reducing hot effect on the mould steel. Through implementing above-mentioned technical scheme, overcome among the prior art automobile body back longeron part quantity many, welding precision intensity is low, is unfavorable for the problem of the promotion of collision security and the continuation of the journey mileage of new energy automobile. In order to further improve the plasticity of the structure, the product is subjected to T7 heat treatment, so that the shape and size change of the product can be kept within a specified range under the condition of long-term service, and the performance stability of the new energy automobile is ensured. The required a large amount of welding jig of longeron welding assembly behind traditional panel beating has been reduced, examine utensil and mould, reduce process flow, the whole car precision of new energy automobile has been promoted, the anti collision performance of back longeron is improved, there is a great design space and design degree of freedom inside the structure of back longeron body, at the reasonable strengthening rib of cavity internal design, through the trend of optimizing the strengthening rib, overall arrangement and material thickness, make its vacuole formation network structure, further improve its collision performance, can effectively promote new energy automobile's crashworthiness security, lightweight coefficient and whole car production beat, it produces property ability and product percent of pass to promote. The mold ejector pin column base is designed at the cross points of the multiple ribs, the hot spot effect on the mold steel can be effectively reduced, the performance of the rear longitudinal beam body can be further improved, the structural design of the steel mold is facilitated, the outline of a narrow conical die-casting mold is avoided, and the qualification rate of products is effectively improved.
Preferably, the rear side member body is integrally molded by high-pressure casting. With high-pressure casting integrated into one piece technique, replace traditional steel sheet metal structure welding assembly for the automobile body is lighter weight, optimizes automobile body part takt.
Preferably, a cross beam is vertically arranged on the inner side of the rear longitudinal beam body, and the cross beam is connected with the rear longitudinal beam body through a flow drill screw. The cross beam is connected with the rear longitudinal beam body through the flow drill screw, so that the bending and twisting rigidity of the whole vehicle is effectively improved.
Preferably, one end of the rear longitudinal beam body is connected with a threshold beam, and the rear longitudinal beam body is connected with the threshold beam through flow drilling screws and bolts. The aluminum profile threshold beam is connected with the rear longitudinal beam body through the flow drill screw and the bolt, so that the force transmission performance can be effectively improved, and the collision resistance of the whole automobile is improved.
Preferably, the side of back longeron body is equipped with a plurality of faying surfaces, the faying surface is including the first faying surface that is used for connecting the threshold roof beam and the second faying surface that is used for connecting the wheel casing, first faying surface sets up the lower part at the back longeron body, the second faying surface sets up in the top edge department at the back longeron body. First faying face sets up the lower part at the back longeron body and is used for connecting the threshold roof beam, and the second faying face sets up the top edge department at the back longeron body and is used for connecting the wheel casing, through integrated form structural design, and integrated a plurality of faying faces are in an organic whole to realize modularization and lightweight, thereby realize the promotion to the protection of new energy automobile battery and continuation of the journey mileage.
Preferably, the bottom of the rear longitudinal beam body is provided with a plurality of mounting holes, and the mounting holes comprise first mounting holes for mounting a battery pack and second mounting holes for mounting a chassis subframe. Through integrated form structural design, integrated a plurality of mounting points in an organic whole to realize modularization and lightweight, thereby realize the protection to new energy automobile battery and the promotion of continuation of the journey mileage.
Preferably, a steel wire thread insert for increasing rigidity is embedded in the second mounting hole, and the second mounting hole comprises a front mounting hole and a rear mounting hole. The steel wire thread insert is embedded into the second mounting hole, the rigidity of the mounting hole of the auxiliary frame is effectively improved, the front mounting hole is used for mounting the auxiliary frame in front, and the rear mounting hole is used for mounting the auxiliary frame in the rear.
Preferably, the bottom of the rear longitudinal beam body is further provided with a mounting surface for mounting a battery pack and a protrusion for fixing the coil spring, the mounting surface is bolted with the battery pack, and the protrusion is arranged between the front mounting hole and the rear mounting hole. The battery pack mounting point is mounted with the battery pack through the bolt, the battery mounting point is arranged on the rear longitudinal beam body, the rigidity of the mounting point of the battery can be effectively improved, the collision safety of the battery is improved, and the spiral spring is placed on the inclined plane of the protrusion and does not need to be fixed independently.
Preferably, the bottom of the rear longitudinal beam body is provided with a plurality of criss-cross transverse reinforcing ribs and longitudinal reinforcing ribs. Through various strengthening rib structures of the cavity internal design of back longeron, reduce the material quantity, have good part rigidity, can effectively promote the collision performance of back longeron and the NVH performance of whole car, at key hard spot installation region, increase inside reinforcing cross muscle again on original structural foundation, can effectively promote mounting point rigidity.
Preferably, the rear side member body is made of AlSi10 MnMg. The material of the rear longitudinal beam body has sufficient elongation and bending angle after being stretched and broken, so that the structure can have good plasticity, and the integration level and the collision energy absorption performance of the structure are improved.
The utility model has the following beneficial effects: (1) the collision resistance and the light weight effect of the rear longitudinal beam and the production rhythm of the whole vehicle are achieved when collision occurs; (2) the plasticity of the structure is improved, and the performance stability is improved; (3) the reinforcing rib structure has the advantages of reducing material consumption, having good component rigidity and effectively improving the collision performance of the rear longitudinal beam and the NVH performance of the whole vehicle.
Drawings
The utility model is further illustrated with reference to the figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural rear view of the rear rail body of the present invention;
fig. 3 is a structural bottom schematic view of the rear side rail body in the utility model.
In the figure: rear longitudinal beam body 1, crossbeam 2, rear floor front beam 2.1, rear floor middle beam 2.2, rear floor entablature 2.3, rear floor rear beam 2.4, doorsill beam 3, faying surface 4, first faying surface 4.1, second faying surface 4.2, strengthening rib 5, mounting hole 6, first mounting hole 6.1, second mounting hole 6.2, preceding mounting hole 6.2.1, back mounting hole 6.2.2, installation face 7, arch 8, rear longitudinal beam back end 9, thimble pylon 11, flow and bore screw 12, bolt 13.
Detailed Description
The first embodiment is as follows:
as shown in fig. 1, a back longeron casting structure for new energy automobile, includes back longeron body 1 and crossbeam 2, and crossbeam 2 sets up the inboard at back longeron body 1 perpendicularly, and crossbeam 2 is connected through flow drill screw 12 with back longeron body 1, and the one end of back longeron body 1 is connected with threshold roof beam 3, and back longeron body 1 is connected through flow drill screw 12 and bolt 13 with threshold roof beam 3. The bottom of the rear longitudinal beam body 1 is provided with a plurality of criss-cross transverse reinforcing ribs and longitudinal reinforcing ribs. The rear longitudinal beam body 1 is made of AlSi10MnMg, and the cross beam 2 comprises a rear floor front cross beam 2.1, a rear floor middle cross beam 2.2, a rear floor upper cross beam 2.3 and a rear floor rear cross beam 2.4.
Among the above-mentioned technical scheme, overcome among the prior art automobile body back longeron part quantity many, welding precision intensity is low, is unfavorable for the problem of the promotion of collision security and the continuation of the journey mileage of new energy automobile. In order to further improve the plasticity of the structure, the product is subjected to T7 heat treatment, so that the shape and size change of the automobile can be kept within a specified range under the condition of long-term service, and the performance stability of the new energy automobile is ensured. The required a large amount of welding jig of longeron welding assembly behind traditional panel beating has been reduced, examine utensil and mould, reduce process flow, the whole car precision of new energy automobile has been promoted, the anti collision performance of back longeron is improved, with the integrative technique that takes shape of high pressure casting, replace traditional steel sheet metal structure welding assembly, make the automobile body lighter-weight more, optimize the automobile body part production beat, aluminium alloy doorsill beam 3 is connected through flow drill screw 12 and bolt 13 with back longeron body 1, can effectively promote the biography power performance, promote whole car and be able to bear or endure the touch nature, crossbeam 2 is connected through flow drill screw 12 with back longeron body 1, effectively promote the turn round rigidity of whole car, structural design through crossbeam 2, realize with four strengthening beam 2's in the back floor assembly matching relation. The material of the rear longitudinal beam body 1 has sufficient elongation and bending angle after being stretched and broken, and can ensure that the structure has good plasticity, so that the integration level and the collision energy absorption performance of the structure are improved. Rear floor front beam 2.1 provides mounting structure for the battery, and rear floor middle beam 2.2 and rear floor rear beam 2.4 provide mounting structure for the back row seat, and rear floor entablature 2.3 further promotes the crashworthiness, increases the biography power route.
The second embodiment is as follows:
as shown in fig. 2, on the basis of embodiment 1, the side surface of the rear side member body 1 is provided with a plurality of overlapping surfaces 4, each overlapping surface 4 includes a first overlapping surface 4.1 for connecting the rocker beam 3 and a second overlapping surface 4.2 for connecting the wheel house, the first overlapping surface 4.1 is provided at the lower portion of the rear side member body 1, and the second overlapping surface 4.2 is provided at the upper edge of the rear side member body 1. The rear longitudinal beam comprises a rear longitudinal beam body 1 and is characterized in that a plurality of reinforcing ribs 5 used for improving collision performance are arranged inside a cavity of the rear longitudinal beam body 1, and the plurality of reinforcing ribs 5 form a cavity net structure. And a mold ejector pin column base 11 for reducing the hot spot effect on the mold steel is arranged at the cross point of the reinforcing rib 5.
Among the above-mentioned technical scheme, first faying face 4.1 sets up and is used for connecting threshold roof beam 3 in the lower part of back longeron body 1, and second faying face 4.2 sets up and is used for connecting the wheel casing in the top edge department of back longeron body 1, through integrated form structural design, integrates a plurality of faying faces in an organic whole to realize modularization and lightweight, thereby realize the protection to new energy automobile battery and the promotion of continuation of the journey mileage. Design mould thimble stylobate 11 at the crosspoint of many muscle, can effectively reduce the hot spot effect on the mould steel, can further promote back longeron body 1 performance, still be favorable to the structural design of steel mould, avoided constrictive toper die casting die profile, effectively promoted the qualification rate of product. There is a great design space and design degree of freedom inside the structure of back longeron body 1, at the reasonable strengthening rib 5 of cavity internal design, through optimizing the trend of strengthening rib 5, overall arrangement and material are thick, make it vacuole formation network structure, further improve its crashworthiness, can effectively promote new energy automobile's crashworthiness security, lightweight coefficient and whole car production beat, promote product property ability and product percent of pass, reduce the material quantity, have good part rigidity, can effectively promote the crashworthiness of back longeron and the NVH performance of whole car, in key hard spot installation zone, increase inside enhancement cross muscle again on original structure basis, can effectively promote mounting point rigidity.
The third concrete embodiment:
as shown in fig. 3, on the basis of embodiment 2, the bottom of the rear side member body 1 is provided with a plurality of mounting holes 6, and the mounting holes 6 include a first mounting hole 6.1 for mounting a battery pack and a second mounting hole 6.2 for mounting a chassis subframe. A steel wire thread insert used for increasing rigidity is embedded in the second mounting hole 6.2. The second mounting holes 6.2 include a front mounting hole 6.2.1 and a rear mounting hole 6.2.2. The bottom of the rear longitudinal beam body 1 is further provided with a mounting surface 7 for mounting a battery pack and a protrusion 8 for fixing a spiral spring, the mounting surface 7 is connected with the battery pack through a bolt, and the protrusion 8 is arranged between the front mounting hole 6.2.1 and the rear mounting hole 6.2.2.
Among the above-mentioned technical scheme, through integrated form structural design, integrated a plurality of mounting points in an organic whole to realize modularization and lightweight, thereby realize the protection to new energy automobile battery and the promotion of continuation of the journey mileage. The steel wire thread insert is embedded into the second mounting hole 6.2, and the rigidity of the mounting hole 6 of the auxiliary frame is effectively improved. The front mounting holes 6.2.1 are used for mounting the subframe in front, and the rear mounting holes 6.2.2 are used for mounting the subframe in rear. The battery pack mounting point is installed on the battery pack through the bolt, the battery mounting point is arranged on the rear longitudinal beam body 1, the rigidity of the mounting point of the battery can be effectively improved, the collision safety of the battery is improved, and the spiral spring is placed on the inclined plane of the protrusion 8 and does not need to be independently fixed.
The utility model has the following beneficial effects: (1) the collision resistance and the light weight effect of the rear longitudinal beam and the production rhythm of the whole vehicle are achieved when collision occurs; (2) the plasticity of the structure is improved, and the performance stability is improved; (3) the reinforcing rib structure has the advantages of reducing material consumption, having good component rigidity and effectively improving the collision performance of the rear longitudinal beam and the NVH performance of the whole vehicle.
Claims (10)
1. The utility model provides a back longeron foundry goods structure for new energy automobile, includes back longeron body (1), characterized by, the inside strengthening rib (5) that are used for improving the crashworthiness that are equipped with of cavity of back longeron body (1), a plurality of strengthening ribs (5) form cavity network structure, the crosspoint of strengthening rib (5) is equipped with mould thimble stylobate (11) that are used for reducing hot spot effect on the mould steel.
2. The casting structure of the rear side member for the new energy automobile as claimed in claim 1, wherein the rear side member body (1) is integrally formed by high pressure casting.
3. The casting structure of the rear longitudinal beam for the new energy automobile is characterized in that a cross beam (2) is vertically arranged on the inner side of the rear longitudinal beam body (1), and the cross beam (2) is connected with the rear longitudinal beam body (1) through a flow drilling screw (12).
4. The rear longitudinal beam casting structure for the new energy automobile is characterized in that a threshold beam (3) is connected to one end of the rear longitudinal beam body (1), and the rear longitudinal beam body (1) is connected with the threshold beam (3) through a flow drill screw (12) and a bolt (13).
5. The rear longitudinal beam casting structure for the new energy automobile is characterized in that a plurality of overlapping surfaces (4) are arranged on the side faces of the rear longitudinal beam body (1), the overlapping surfaces (4) comprise a first overlapping surface (4.1) used for connecting a threshold beam (3) and a second overlapping surface (4.2) used for connecting a wheel cover, the first overlapping surface (4.1) is arranged at the lower portion of the rear longitudinal beam body (1), and the second overlapping surface (4.2) is arranged at the upper edge of the rear longitudinal beam body (1).
6. The rear longitudinal beam casting structure for the new energy automobile is characterized in that a plurality of mounting holes (6) are formed in the bottom of the rear longitudinal beam body (1), and the mounting holes (6) comprise first mounting holes (6.1) for mounting a battery pack and second mounting holes (6.2) for mounting a chassis subframe.
7. The rear longitudinal beam casting structure for the new energy automobile is characterized in that a steel wire thread sleeve for increasing rigidity is embedded in the second mounting hole (6.2), and the second mounting hole (6.2) comprises a front mounting hole (6.2.1) and a rear mounting hole (6.2.2).
8. The casting structure of the rear longitudinal beam for the new energy automobile as claimed in claim 7, wherein a mounting surface (7) for mounting a battery pack and a protrusion (8) for fixing a coil spring are further arranged at the bottom of the rear longitudinal beam body (1), the mounting surface (7) is bolted with the battery pack, and the protrusion (8) is arranged between the front mounting hole (6.2.1) and the rear mounting hole (6.2.2).
9. The casting structure of the rear longitudinal beam for the new energy automobile as claimed in claim 1, wherein the bottom of the rear longitudinal beam body (1) is provided with a plurality of criss-cross transverse reinforcing ribs and longitudinal reinforcing ribs.
10. The rear longitudinal beam casting structure for the new energy automobile according to claim 1, 3, 4, 5, 6 or 8, wherein the rear longitudinal beam body (1) is made of AlSi10 MnMg.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122907593.8U CN216546382U (en) | 2021-11-23 | 2021-11-23 | A back longeron foundry goods structure for new energy automobile |
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| CN202122907593.8U CN216546382U (en) | 2021-11-23 | 2021-11-23 | A back longeron foundry goods structure for new energy automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115384623A (en) * | 2022-08-29 | 2022-11-25 | 奇瑞新能源汽车股份有限公司 | Automobile body C column upper joint connecting structure |
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2021
- 2021-11-23 CN CN202122907593.8U patent/CN216546382U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115384623A (en) * | 2022-08-29 | 2022-11-25 | 奇瑞新能源汽车股份有限公司 | Automobile body C column upper joint connecting structure |
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