CN113771959B - New energy automobile strengthens threshold - Google Patents
New energy automobile strengthens threshold Download PDFInfo
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- CN113771959B CN113771959B CN202111121695.5A CN202111121695A CN113771959B CN 113771959 B CN113771959 B CN 113771959B CN 202111121695 A CN202111121695 A CN 202111121695A CN 113771959 B CN113771959 B CN 113771959B
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- door sill
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 129
- 238000003466 welding Methods 0.000 claims description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 description 5
- 230000009545 invasion Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
- B60K2001/0438—Arrangement under the floor
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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 discloses a new energy automobile reinforcing doorsill, and aims to overcome the defect that the conventional automobile doorsill deforms and invades a battery area when being impacted by a side face, so that a power battery module is extruded. The energy-saving and energy-saving type power battery door sill comprises a door sill outer plate, a door sill inner plate and a door sill reinforcing structure, wherein the door sill inner plate is sequentially connected with a seat cross beam, a reinforcing plate and a power battery module from top to bottom, the door sill outer plate and the door sill inner plate form a hollow cavity, the door sill reinforcing structure is arranged in the hollow cavity, the door sill reinforcing structure is fixedly connected with the upper portion and the lower portion of the door sill outer plate, one end, far away from the door sill outer plate, of the door sill reinforcing structure is arranged at the position corresponding to the seat cross beam and the reinforcing plate, and the door sill reinforcing structure and the hollow cavity form a collapsing cavity. A hollow triangle is arranged at the position corresponding to the power battery module, and a splayed support is arranged, so that the volume of a part at the lower part of the hollow cavity is reduced, the rigidity is reduced, the collapsing space is enlarged, and the battery area is prevented from being invaded.
Description
Technical Field
The invention relates to the field of automobile body production, in particular to a new energy automobile reinforcing doorsill.
Background
The new energy automobile generally weighs 200 kg-300 kg or more for the same-grade traditional automobile, so that the collision energy of the side of the automobile under the pillar collision working condition is greatly increased, and the collision safety risk is increased. Meanwhile, in order to increase the endurance mileage of the new energy automobile, the battery size usually covers the whole floor, so that the safety space from the battery module to the threshold beam is small. This can result in a vehicle side impact, especially in the side post impact, the threshold invasion is too big, extrudes power battery module problem, has great electric safety risk. The traditional automobile doorsill beam reinforcing structure generally adopts a steel reinforcing box structure or an angle steel structure and the like. In the side column collision process, the vehicle threshold deforms seriously, the risk of extruding a power battery module exists, and the electrical safety requirement of the new energy automobile is difficult to meet.
Therefore, it is necessary to add a reinforcing structure to the rocker beam to transmit and disperse the collision load, reduce the intrusion amount, and ensure the safety of passengers and the electrical safety in the vehicle. The utility model aims at realizing a new energy automobile reinforcing threshold that threshold deformation was still less to battery invasion volume when the reduction received the striking in the car side.
Disclosure of Invention
The invention overcomes the defect that the conventional automobile threshold can deform and invade a battery area when being impacted by a side face, and has the risk of extruding a power battery module, and provides the new energy automobile reinforcing threshold which can reduce invasion to the battery area on the premise of improving the integral strength through structural innovation, avoid battery damage and meet the electrical safety requirement of a new energy automobile.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a threshold is strengthened to new energy automobile, includes threshold planking, threshold inner panel and threshold additional strengthening, and threshold inner panel from the top down has connected gradually seat crossbeam and reinforcing plate and power battery module, and threshold planking and threshold inner panel form hollow cavity, and the threshold additional strengthening sets up in the hollow cavity, the upper portion and the lower part of threshold additional strengthening fixed connection threshold planking, the one end setting that the threshold planking was kept away from to the threshold additional strengthening are corresponding seat crossbeam and reinforcing plate position, and the threshold additional strengthening becomes the routed chamber of contracting with hollow cavity.
The mutually jointed edges of the inner doorsill plate and the outer doorsill plate of the automobile are welded together, the turned part of the turned part is bulged out from the outside and the inside to form a hollow cavity, and one ends of the seat cross beam and the reinforcing plate are lapped and welded at the upper part of the inner doorsill plate corresponding to the hollow cavity. The power battery module area is arranged below the seat cross beam and the reinforcing plate, and due to the military competition of various recent electric automobile manufacturers in the aspect of endurance, under the condition that the energy density of the battery is slowly improved, the volume of the battery is larger, the edge of the battery is closer to the inner plate of the threshold, and the deformation caused by impact on the threshold is easy to invade the battery area. Therefore, the doorsill reinforcing structure is added between the hollow cavities, the doorsill reinforcing structure and the doorsill outer plate are connected in a mode that the doorsill reinforcing structure and the doorsill outer plate form a triangle in the X-axis direction of the automobile, and the other corner of the triangle corresponds to the positions of the seat cross beam and the reinforcing plate. When the automobile is impacted, the hollow cavity is deformed, the doorsill reinforcing structure is abutted to the doorsill inner plate and further abutted to the seat cross beam and the reinforcing plate, so that the impact load is transmitted to the non-impact side of the automobile body along the doorsill, the load is resolved, and the intrusion amount is reduced. Because the cross section of the hollow cavity in the X-axis direction of the automobile is square, another hollow triangle is formed by the doorsill reinforcing structure and the hollow cavity due to the triangle, the rigidity is low, and the triangle corresponds to the power battery module. When the side of the automobile is impacted, the hollow triangle has a larger collapsing space, the risk that the lower part of the threshold extrudes the power battery module is reduced, and the electric safety of the new energy automobile is guaranteed to the greatest extent.
Preferably, the doorsill reinforcing structure comprises a reinforcing section bar and a plurality of supporting brackets, the reinforcing section bar is a hollow pipe along the length direction of the car body, each supporting bracket comprises a supporting surface and a connecting side surface, the supporting surface is fixedly connected with the reinforcing section bar, one end, far away from the supporting surface, of each connecting side surface is turned outwards to form a welding flanging, the connecting side surfaces are provided with supporting reinforcing ribs, and the supporting brackets are arranged at equal intervals along the length direction of the reinforcing section bar.
The reinforcing section bar is arranged along the X-axis direction of the car body, the reinforcing section bar is connected to the outer plate of the doorsill through a welding flanging on the supporting bracket, and the supporting surface is supported on the reinforcing section bar. The arrangement of the plurality of supporting brackets can ensure that the reinforcing section bar does not turn over and plays a force transferring role during side collision. The connecting side surface plays a role in transferring force between adjacent supporting brackets, the reinforcing section bar is prevented from overturning by using the force of the threshold outer plate for resisting plastic deformation, and then the support reinforcing ribs are arranged to strengthen the connection between the supporting surface and the welding flanging.
Preferably, the cross section of the reinforcing section bar is in a shape like a Chinese character mu, the reinforcing section bar comprises an upper surface, a lower surface, an outer side surface, an inner side surface and a plurality of section bar reinforcing ribs for connecting the upper surface and the lower surface, and a plurality of leakage holes are arranged on the upper surface and the lower surface. The strength of the section is improved by arranging the section reinforcing ribs. The number of the section bar reinforcing ribs is increased or decreased according to the vehicle type, 2 reinforcing ribs are preferably arranged in general, and the adjacent reinforcing ribs are arranged at equal intervals.
Preferably, the left end and the right end of the supporting surface are symmetrically connected with connecting side surfaces, and the top of the supporting surface is provided with a mounting hole. The supporting surface is attached to the lower surface and connected through a fastener. The connection side at both ends opens to the outside about the holding surface, is "eight" font, and the mounting hole of support holder, welding turn-ups are the triangle-shaped form, the structure has reduced the occupation to hollow cavity lower part space, has reduced the rigidity of hollow cavity lower part, reduces to invade the battery space.
Preferably, the reinforcing section bar and the support bracket are fixedly connected by means of fasteners. Specifically, the reinforcing section bar is fixed on the support brackets through self-plugging rivets, and in order to ensure the connection strength, two rivets are arranged on each support bracket. The self-plugging rivet is suitable for the condition that a workpiece can be riveted only from one side, and is suitable for connecting an aluminum alloy section with a closed cavity structure with a supporting bracket.
Preferably, the reinforcing profile is fixedly connected to the sill outer panel by means of a fastener. The outer side surface of the reinforcing section bar is provided with 10 mounting holes in the length direction and used for connecting the reinforcing section bar and the doorsill outer plate. The reinforcing section bar is connected with the threshold outer plate through a rivet nut and a bolt. The rivet nut is suitable for the condition of fastening the workpiece from a single side, internal threads are provided during riveting, welding nuts and tapping are not needed, and connection is simple and effective.
Preferably, the surface area of the outer side of the reinforcing profile is smaller than the surface area of the inner side. The structure can better transmit load to the seat cross beam and the reinforcing plate.
Preferably, the reinforcing section bar is made of an aluminum alloy. The material has high strength and light density. The size, thickness, material strength grade, and the like of the reinforcing section bar can be appropriately adjusted according to the magnitude of the collision energy.
Compared with the prior art, the invention has the beneficial effects that: (1) the reinforcing section bar is arranged at the position right opposite to the seat cross beam and the reinforcing plate, so that the collision load is transferred to the non-collision side of the vehicle body, and the load is eliminated; (2) the hollow triangle is arranged at the position corresponding to the power battery module, the splayed support bracket is arranged, and the volume of the lower part of the hollow cavity is reduced, so that the rigidity is reduced, the collapsing space is enlarged, and the intrusion into the battery area is avoided; (3) when external force acts on the doorsill, load can be guided to be transmitted to the seat cross beam and the reinforcing plate through deformation of the doorsill, the non-impact side of the vehicle body is reached, a battery is protected, and personal safety on the vehicle is protected.
Drawings
Fig. 1 is a front view of a rocker reinforcement structure of the invention;
fig. 2 is a right side view of the sill reinforcing structure of the present invention;
FIG. 3 is a perspective view of the reinforcing profile of the present invention;
FIG. 4 is a perspective view of the support bracket of the present invention;
FIG. 5 is a schematic view of a threshold of the present invention;
in the figure:
the structure comprises a threshold outer plate 1, a threshold inner plate 2, a threshold reinforcing structure 3, a seat crossbeam and reinforcing plate 4, a power battery module 5, a hollow cavity 6, a collapsing cavity 7, a reinforcing section bar 8, a supporting bracket 9, a supporting surface 10, a welding flanging 11, a bracket reinforcing rib 12, an upper surface 13, a lower surface 14, an outer side surface 15, an inner side surface 16, a section bar reinforcing rib 17, a leak hole 18, a connecting side surface 19, a mounting hole 20 and a self-plugging rivet 21.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
In the automotive industry, the X direction generally refers to the direction from the head to the space, the Y direction is the left-right direction of the vehicle body, and the Z direction is the roof to the chassis direction.
Example (b):
a new energy automobile reinforcing doorsill comprises a doorsill outer plate 1, a doorsill inner plate 2 and a doorsill reinforcing structure 3, wherein the doorsill inner plate 2 is sequentially connected with a seat cross beam, a reinforcing plate 4 and a power battery module 5 from top to bottom, and the doorsill outer plate 1 and the doorsill inner plate 2 form a hollow cavity 6. The mutually jointed edges of a threshold inner plate 2 and a threshold outer plate 1 of the automobile are welded together, a part of the turned part bulges out from the outside to the inside, so-called hollow cavity 6 is formed, and one end of a seat cross beam and a reinforcing plate 4 is lapped and welded on the upper part of the threshold inner plate 2 corresponding to the hollow cavity 6.
The doorsill reinforcing structure 3 is arranged in the hollow cavity 6, the doorsill reinforcing structure 3 is fixedly connected with the upper portion and the lower portion of the doorsill outer plate 1, one end, far away from the doorsill outer plate 1, of the doorsill reinforcing structure 3 is arranged at the position corresponding to the seat cross beam and the reinforcing plate 4, and the doorsill reinforcing structure 3 and the hollow cavity 6 are further formed with a crumpling cavity 7. The connecting mode of the threshold reinforcing structure 3 and the threshold outer plate 1 enables the threshold reinforcing structure 3 and the threshold outer plate 1 to form a triangle in the X-axis direction of the automobile, and the other corner of the triangle corresponds to the positions of the seat cross beam and the reinforcing plate 4. When being impacted, the hollow cavity 6 deforms, the doorsill reinforcing structure 3 abuts against the doorsill inner plate 2 and further abuts against the seat cross beam and the reinforcing plate 4, so that the impact load is transmitted to the non-impact side of the vehicle body along the doorsill, the load is eliminated, and the intrusion amount is reduced. Because the cross section of the hollow cavity 6 in the X-axis direction of the automobile is square, another hollow triangle is formed by the threshold reinforcing structure 3 and the hollow cavity 6 due to the triangle, the rigidity is low, and the triangle corresponds to the power battery module 5. When the side of the automobile is impacted, the hollow triangle has a larger collapsing space, the risk that the lower part of the threshold extrudes the power battery module 5 is reduced, and the electric safety of the new energy automobile is guaranteed to the greatest extent.
In particular, the sill-reinforcing structure 3 comprises a reinforcing section bar 8 and a plurality of support brackets 9.
As shown in fig. 3, the reinforcing section bar 8 is an aluminum alloy hollow tube in the direction. The cross section of the reinforcing section bar 8 is in a shape like Chinese character 'mu', the reinforcing section bar 8 comprises an upper surface 13, a lower surface 14, an outer side surface 15, an inner side surface 16 and a plurality of section bar reinforcing ribs 17 connecting the upper surface 13 and the lower surface 14, and a plurality of leakage holes 18 are arranged on the upper surface 13 and the lower surface 14. The strength of the profile is improved by arranging a plurality of profile reinforcing ribs 17. The number of the section reinforcing ribs 17 is increased or decreased according to the vehicle type, and generally 2 reinforcing ribs are preferably arranged at equal intervals. The surface area of the outer side 15 of the reinforcing profile 8 is smaller than the surface area of the inner side 16. The structure can better transmit the load to the seat cross member and the reinforcement plate 4. The material has high strength and light density. The size, thickness, material strength grade, and the like of the reinforcing section 8 can be appropriately adjusted according to the magnitude of the collision energy.
As shown in fig. 4, the supporting bracket 9 includes a supporting surface 10 fixedly connected to the reinforcing section bar 8 and connecting side surfaces 19 symmetrically connected to both ends of the reinforcing section bar 8, and a mounting hole 20 is formed at the top of the supporting surface 10. The support surface 10 abuts the lower surface 14 and is attached to the fastener by means of the mounting hole 20. The end of the connecting side surface 19, which is far away from the supporting surface 10, is turned outwards to form a welding flange 11, and the welding flange 11 is attached to and welded with the sill outer panel 1. The connecting side surface 19 is provided with support reinforcing ribs 12, and the support supports 9 are arranged at equal intervals along the length direction of the reinforcing section bar 8. The connecting side surfaces 19 at the left and right ends of the supporting surface 10 are opened outwards and are in a splayed shape. The mounting holes 20 of the support bracket 9 and the welding flanges 11 form three angular points of a triangle, and an isosceles triangle is formed. The structure reduces the occupation of the space at the lower part of the hollow cavity 6, reduces the rigidity of the lower part of the hollow cavity 6 and reduces the intrusion into the battery space.
As shown in fig. 1, the reinforcing section bar 8 and the support bracket 9 are fixedly connected by means of fasteners. The outer side 15 of the reinforcing profile 8 is provided with 10 mounting holes 20 in the longitudinal direction for connecting the reinforcing profile 8 to the rocker outer panel 1. The reinforcing section bar 8 is connected with the doorsill outer plate 1 through a rivet nut and a bolt. The rivet nut is suitable for the condition of fastening the workpiece from a single side, internal threads are provided during riveting, welding nuts and tapping are not needed, and connection is simple and effective. The support bracket 9 plays a role in drawing the reinforcing section bar 8, when the doorsill is impacted by the side face, the upper part of the doorsill is sunken firstly, the welding flanging 11 draws the reinforcing section bar 8 at the moment, the reinforcing section bar is prevented from being overturned upwards, the reinforcing section bar is always opposite to the seat crossbeam and the reinforcing plate 4, and a good force transmission position is kept.
After receiving the striking, hollow cavity 6 can produce deformation for medial surface 16 laminating threshold inner panel 2, and the support bracket 9 of striking position and striking position both sides also can form a triangle-shaped, the characteristic can make the load of striking in the threshold lower part can pass through triangle-shaped's three fulcrum transmission for "the point" form that leads to the fact with less area of contact strikes can "even" expand along threshold planking 1, enlarges the area of deformation, reduces the invasion volume of assaulting the maximum position.
As shown in fig. 2, the reinforcing profile 8 is fixedly connected to the rocker outer panel 1 by means of fasteners. In particular, the reinforcing section bar 8 is fixed to the support brackets 9 by blind rivets 21, and in order to ensure the connection strength, two rivets are provided on each support bracket 9, which rivets are arranged in the Y direction. The blind rivet 21 is suitable for riveting a workpiece from only one side, and is suitable for connecting an aluminum alloy section with a closed cavity structure with the support bracket 9. The welding flanging 11 on the supporting bracket 9 is connected on the threshold outer plate 1. The arrangement of a plurality of support brackets 9 ensures that the reinforcing profile 8 does not turn over during a side impact and plays a force-transmitting role. The connecting flanks 19 serve to transmit forces between adjacent support struts 9, the reinforcing profile 8 being prevented from turning over by the force of the threshold outer plate 1 opposing the plastic deformation, so that the support struts 12 can strengthen the connection between the support flanks 10 and the welding flanges 11.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (8)
1. A new energy automobile reinforced doorsill is characterized by comprising a doorsill outer plate, a doorsill inner plate and a doorsill reinforcing structure, wherein the doorsill inner plate is sequentially connected with a seat cross beam, a reinforcing plate and a power battery module from top to bottom; the doorsill reinforcing structure comprises a reinforcing section bar and a plurality of supporting brackets, each supporting bracket comprises a supporting surface and a connecting side surface, the supporting surface is fixedly connected with the reinforcing section bar, one end, far away from the supporting surface, of each connecting side surface is turned outwards to form a welding flanging, and the welding flanging is in fit welding with the doorsill outer plate.
2. The new energy automobile reinforcing doorsill according to claim 1, wherein the reinforcing section bar is a hollow pipe along the length direction of the automobile body, the supporting bracket comprises a supporting surface fixedly connected with the reinforcing section bar and a connecting side surface, one end of the connecting side surface, far away from the supporting surface, is turned outwards to form a welding flanging, the connecting side surface is provided with bracket reinforcing ribs, and the supporting brackets are arranged at equal intervals along the length direction of the reinforcing section bar.
3. The new energy automobile reinforcing doorsill according to claim 2, wherein the cross section of the reinforcing section bar is in a shape like a Chinese character mu, the reinforcing section bar comprises an upper surface, a lower surface, an outer side surface, an inner side surface and a plurality of section bar reinforcing ribs connecting the upper surface and the lower surface, and a plurality of leakage holes are formed in the upper surface and the lower surface.
4. The new energy automobile reinforcing doorsill according to claim 2, wherein the left and right ends of the supporting surface are symmetrically connected with connecting side surfaces, and the top of the supporting surface is provided with a mounting hole.
5. The reinforcing doorsill of a new energy automobile as claimed in claim 3, wherein the reinforcing section bar is fixedly connected with the outer plate of the doorsill through a fastening member.
6. The reinforcing doorsill of a new energy automobile as claimed in claim 2, wherein the reinforcing section bar and the support bracket are fixedly connected by a fastener.
7. The new energy automobile reinforcing doorsill according to claim 3, wherein the surface area of the outer side surface of the reinforcing section bar is smaller than that of the inner side surface.
8. The reinforcing doorsill of a new energy automobile as claimed in any one of claims 2 to 7, wherein the reinforcing section bar is made of an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111121695.5A CN113771959B (en) | 2021-09-24 | 2021-09-24 | New energy automobile strengthens threshold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111121695.5A CN113771959B (en) | 2021-09-24 | 2021-09-24 | New energy automobile strengthens threshold |
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| CN113771959A CN113771959A (en) | 2021-12-10 |
| CN113771959B true CN113771959B (en) | 2022-09-16 |
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| CN202111121695.5A Active CN113771959B (en) | 2021-09-24 | 2021-09-24 | New energy automobile strengthens threshold |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116215664A (en) * | 2023-03-17 | 2023-06-06 | 岚图汽车科技有限公司 | Lower car body structure and car |
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