CN217835796U

CN217835796U - A crossbeam for lightweight new energy automobile seat

Info

Publication number: CN217835796U
Application number: CN202221501496.7U
Authority: CN
Inventors: 吴志豪; 程鹏; 王林山; 盛广华; 张鹏飞; 周小燕; 宗磊
Original assignee: Shape Auto Parts China Co ltd
Current assignee: Shape Auto Parts China Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-11-18
Anticipated expiration: 2032-06-16

Abstract

The utility model discloses a crossbeam for lightweight new energy automobile seat, the whole appearance is linear and straight, characterized in that the crossbeam is formed by steel strip metal plate, rolling and local welding into a whole, the cross section shape of the crossbeam vertical to the length direction is set as a closed outline; the middle part of the closed contour is provided with an X-shaped cross part and is divided into a left cavity and a right cavity with collinear bottom edges by the X-shaped cross part, the left side wall of the left cavity is inclined from left bottom to right, and the right side wall of the right cavity is inclined from right bottom to left. By applying the cross beam section optimization of the utility model, the outline of the cross section shape is shaped like a trapezoid, when the automobile body is impacted by collision, the energy of the impact can be resisted by the cross beam, and the battery pack is protected; the rigidity of the closed contour is stronger than that of a pure rectangular contour, the cross section resisting moment of the seat beam can be increased by 3% and the torsional rigidity of the seat beam can be increased by 107% under the condition of the same weight through roll forming with higher production efficiency, and the requirements of new energy automobiles on the performance of parts are met.

Description

A crossbeam for lightweight new energy automobile seat

Technical Field

The utility model relates to a new energy automobile's body in white part especially relates to a lightweight seat installation crossbeam.

Background

With the increasing of the quantity of new energy automobiles, more and more body-in-white designs are specially developed for the new energy automobiles, and the body structures of the new energy automobiles are gradually separated from the inherent design of the traditional fuel oil automobiles. In order to improve the endurance mileage of a new energy automobile, integration and light weight of automobile body parts become more important. Meanwhile, because the new energy automobile has a battery pack which is not available in the traditional fuel oil automobile, and the battery pack has very high requirements on collision safety and the rigidity of the whole automobile, the seat cross beam becomes a very important safety part for the new energy automobile. Therefore, the research and development of the seat cross beam with a more reasonable structure can meet the installation requirement of the seat and simultaneously improve the safety performance as much as possible, and is an important subject to be researched by the industry personnel.

Disclosure of Invention

The utility model aims at providing a crossbeam for lightweight new energy automobile seat, through the optimization to crossbeam cross sectional shape, when keeping the same bending resistance performance with traditional fuel vehicle, reduce part quantity, alleviate the automobile body dead weight.

The utility model provides a technical solution who realizes above-mentioned purpose is, a crossbeam for lightweight new energy automobile seat, whole appearance is linear straight, its characterized in that: the cross beam is formed by a steel strip metal plate, rolling and local welding into a whole, and the cross section of the cross beam perpendicular to the length direction is in a closed outline shape; the middle part of closed profile is equipped with X shape intersection to separate into left cavity and the right cavity of base collineation by X shape intersection, the left side wall of left side cavity is by the left side down to the right side slope, and the right side wall of right side cavity is by the right side down to the left side slope.

Further, the vertical direction inclination angle alpha of the left side wall of the left cavity relative to the bottom edge is 3-20 degrees, and the vertical direction inclination angle beta of the right side wall of the right cavity relative to the bottom edge is 3-20 degrees.

Furthermore, the middle part of the steel belt in the width direction is provided with an inclined wall, two ends of the inclined wall are bent in two directions in a segmented mode to form a left cavity and a right cavity, the steel belt edge corresponding to the left cavity and the steel belt edge corresponding to the right cavity are welded with the inclined wall respectively, and the inclined wall and the steel belt edges on the two sides are combined to form an X-shaped cross part.

Furthermore, the steel strip edge is provided with an overlapped flanging for increasing contact at the welding position with the inclined wall.

Furthermore, the inclined wall is arranged to be low at the left side and high at the right side, the left cavity is integrally bent from the bottom end of the inclined wall clockwise to form a bottom edge, a left side wall, a first upper wall and a downhill wall meeting the inclined wall, the right cavity is integrally bent from the top end of the inclined wall clockwise to form a second upper wall, a right side wall, a bottom edge and an uphill wall meeting the inclined wall, and the tail ends of the downhill wall and the uphill wall, which are close to the inclined wall, are steel strip edges.

Still further, the first upper wall and the second upper wall are parallel or collinear, and the first upper wall intersects the bottom edge in the extending direction.

Furthermore, the areas of the left cavity and the right cavity are equal, and the left cavity and the right cavity are symmetrical relative to the central vertical axis of the X-shaped intersection part.

Further, the area ratio of the left cavity and the right cavity is less than three times.

Furthermore, the steel strip is provided with round corners in smooth transition at all the bending positions, and the radius of each round corner is more than four times of the thickness of the steel strip.

Use the utility model discloses a crossbeam possesses following progressive advantage: the cross section shape of the cross beam is optimized, and the left side wall and the right side wall are obliquely arranged, so that the outline of the cross section shape is shaped like a trapezoid, and when a vehicle body is impacted by collision, the energy of the impact can be resisted by the cross beam to protect a battery pack; the rigidity of the closed contour is stronger than that of a simple rectangular contour, the cross section resisting moment of the seat beam can be increased by 3% and the torsional rigidity can be increased by 107% under the condition of the same weight through the rolling forming with higher production efficiency, and the requirements of light weight and battery pack protection of a new energy automobile are met.

Drawings

Fig. 1 is a schematic perspective view of the cross beam of the present invention.

Fig. 2 is a schematic cross-sectional shape and structure view perpendicular to the length direction of the cross beam according to the preferred embodiment of the present invention.

Detailed Description

The following detailed description is made of specific embodiments of the present invention with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and grasp, and thus make a clearer definition of the protection scope of the present invention.

The utility model discloses the designer relies on long-term production line experience to the requirement of new energy automobile body-in-white design lightweight and high strength, and the innovation has provided a neotype crossbeam structure, concretely relates to its perpendicular to length direction's cross sectional shape design. On the premise of greatly improving the performance and keeping the same as that of the traditional fuel vehicle, the fuel vehicle can be widely applied to production lines of various new energy automobile products, the number of parts is reduced, and the self weight of the vehicle body is reduced.

As can be seen from the perspective view of the cross member shown in fig. 1 and the cross-sectional shape and the structural schematic diagram shown in fig. 2, the overall shape of the cross member is as a rule linear and straight, and in practical applications, the cross member can be freely cut according to the required length. From the technical summary of structural innovation, the beam is formed by a steel strip sheet metal, rolling and local welding into a whole; the cross section of the beam perpendicular to the length direction is set to be a closed contour; the middle part of the closed contour is provided with an X-shaped cross part, and the X-shaped cross part is divided into a left cavity 1 and a right cavity 2 with collinear bottom edges, wherein the most important optimization is as follows: the left side wall of left cavity is by left side down to the right side slope, and the right side wall of right cavity is by right side down to the left side slope to the integrated into one piece is similar to trapezoidal closed profile.

In the preferred embodiment shown in the figure, the steel strip is provided with inclined walls 3 with a lower left part and a higher right part in the middle part in the width direction, and the included angle between the plane of the inclined walls and the horizontal plane is about 45 degrees, and the steel strip can be adjusted slightly according to other specifications of the cross beam. Two ends of the inclined wall are bent in two directions in a segmented manner to form a left cavity and a right cavity, the steel belt edge 4 corresponding to the left cavity and the steel belt edge 5 corresponding to the right cavity are welded with the inclined wall respectively, and the inclined wall and the steel belt edges on the two sides are combined to form an X-shaped cross part. Specifically, the left end a of the inclined wall 3 is bent into a bottom edge 11 extending horizontally leftward, then bent upward by more than 90 ° to form a left side wall 12, and then bent rightward by less than 90 ° to form a first upper wall 13, and when the length of the first upper wall 13 is close to the upper space of the left end of the inclined wall, then bent rightward to form a descending side wall 14 facing the inclined wall. Correspondingly, the right end B of the inclined wall 3 is bent rightwards at an acute angle to form a second upper wall 23, then bent downwards at an acute angle to form a right side wall 22, and when the right side wall 22 is close to the plane of the bottom edge 11, bent rightwards at an angle exceeding 90 degrees to form a bottom edge 21 on the other side (the two bottom edges are collinear), and when the extending length of the bottom edge 21 is close to the lower part of the right end of the inclined wall, bent rightwards continuously to form an upper inclined wall 24 meeting the inclined wall. It can be seen that, in the illustrated arrangement of the inclined wall, the left cavity 1 and the right cavity 2 are both formed by bending and forming clockwise segments.

In addition to bending by rolling, the closed loop profile described above requires a fixed profiling. Therefore, the edges of the steel strip formed by the steel strip corresponding to the left cavity and the right cavity need to be welded and solidified with the inclined wall. In order to increase the contact degree of welding and improve the impact strength after welding, the tail ends of the downward slope wall and the upward slope wall close to the inclined wall are respectively provided with a flanging with arc transition, so that the flanging is attached to the inclined wall in parallel and overlapped and welded, and the structure and the deformation resistance strength of the X-shaped intersection part can be understood. When any upper wall or side wall is impacted by external force, the energy is transmitted to the X-shaped intersection part and transmitted to the linear direction of the inclined wall, and the impact energy is absorbed through welding points on the edges of the steel strips. Thus, the ability of the cross beam to resist bending is enhanced, and the ability of the cross beam to resist bending is improved under the condition of the same weight as that of a seat cross beam of the traditional stamping process. In addition, in order to avoid stress concentration, all bending parts of the beam are provided with round corners in smooth transition, and the radius of each round corner is not less than four times of the thickness of the steel belt. Wherein the thickness of the steel strip used by the beam is more than 1mm, and the tensile strength is more than 1000 MPa.

In further detail, the cross-section of the cross-beam has an asymmetrical structure between the left and right cavities. The cross beam is generally affected by the seat assembly after being installed on the front floor, the left and right cavities can also be in an asymmetric structure with a large left and a small right (in the illustrated preferred embodiment), or with a small left and a large right, and when the left and right cavities are in an asymmetric structure, the area ratio of the two cavities is not more than 3. Wherein the first upper wall 13 and the second upper wall 23 are parallel or collinear, and the first upper wall 13 and the bottom edge 11 intersect in the extending direction, and the included angle is determined according to the actual assembly requirement of the seat. The height of the beam ranges from 25mm to 80mm, and the width ranges from 60mm to 210mm. The inclination angle alpha of the left side wall 12 of the left cavity 1 relative to the vertical direction of the bottom edge is 3-20 degrees, and the inclination angle beta of the right side wall 22 of the right cavity 2 relative to the vertical direction of the bottom edge is 3-20 degrees; the inclination angle α and the inclination angle β may be equal or unequal, depending on the assembly structure. In the illustrated embodiment, the beam is made of martensitic steel, the tensile strength is 1500Mpa, the material thickness is 1mm, the section height H is 68mm, the section width L is 180mm, α =10 °, and β =10 °.

Moreover, the areas of the left cavity and the right cavity are equal, and the left cavity and the right cavity are symmetrical relative to the central vertical axis of the X-shaped cross part. Under the condition of not considering the assembly requirement of the seat, when the left cavity and the right cavity are of a symmetrical structure, the stress state is most reasonable.

To sum up about the utility model discloses the structure introduction and the embodiment detailing of crossbeam cross-sectional shape are visible, and this scheme possesses substantive characteristics and progressive: the cross section shape of the cross beam is optimized, and the left side wall and the right side wall are obliquely arranged, so that the outline of the cross section shape is shaped like a trapezoid, and when a vehicle body is impacted by collision, the energy of the impact can be resisted by the cross beam, and a battery pack is protected; the rigidity of the closed contour is stronger than that of a simple rectangular contour, and the closed contour is formed by rolling with higher production efficiency, and a comparison test shows that the cross section resisting moment of the seat cross beam can be increased by 3% and the torsional rigidity can be increased by 107% under the condition of the same weight, so that the requirements of light weight and battery pack protection of a new energy automobile are met.

In addition to the above embodiments, the present invention may have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of the present invention.

Claims

1. The utility model provides a crossbeam for lightweight new energy automobile seat, whole appearance is linear straight, its characterized in that: the cross beam is formed into a whole by a steel strip metal plate, rolling and local welding, and the cross section of the cross beam perpendicular to the length direction is set to be a closed contour; the middle part of closed profile is equipped with X shape intersection to separate into left cavity and the right cavity of base collineation by X shape intersection, the left side wall of left side cavity is by the left side down to the right side slope, and the right side wall of right side cavity is by the right side down to the left side slope.

2. The cross beam for the light-weight new energy automobile seat according to claim 1, characterized in that: the inclination angle alpha of the left side wall of the left cavity body in the vertical direction relative to the bottom edge is 3-20 degrees, and the inclination angle beta of the right side wall of the right cavity body in the vertical direction relative to the bottom edge is 3-20 degrees.

3. The cross beam for the light-weight new energy automobile seat according to claim 1, characterized in that: the steel belt is provided with an inclined wall in the middle in the width direction, two ends of the inclined wall are bent in a segmented mode towards two directions to form a left cavity and a right cavity, the steel belt edge corresponding to the left cavity and the steel belt edge corresponding to the right cavity are welded with the inclined wall respectively, and the inclined wall and the steel belt edges on the two sides are combined to form an X-shaped cross portion.

4. The cross beam for the light-weight new energy automobile seat according to claim 3, characterized in that: and overlapping flanges for increasing contact are arranged at the welding positions of the steel strip edges and the inclined wall.

5. The cross beam for the light-weight new energy automobile seat according to claim 3, characterized in that: the inclined wall is arranged in a mode that the left cavity is lower at the left side and higher at the right side, the left cavity is integrally bent from the bottom end of the inclined wall in a clockwise mode to form a bottom edge, a left side wall, a first upper wall and a descending wall meeting the inclined wall, the right cavity is integrally bent from the top end of the inclined wall in a clockwise mode to form a second upper wall, a right side wall, a bottom edge and an ascending wall meeting the inclined wall, and the tail ends, close to the inclined wall, of the descending wall and the ascending wall are steel belt edges.

6. The cross beam for the light-weight new energy automobile seat according to claim 5, characterized in that: the first upper wall and the second upper wall are parallel or collinear, and the first upper wall and the bottom edge intersect in the extending direction.

7. The cross beam for the light-weight new energy automobile seat according to claim 1, characterized in that: the areas of the left cavity and the right cavity are equal, and the left cavity and the right cavity are symmetrical relative to the central vertical axis of the X-shaped cross part.

8. The cross beam for the light-weight new energy automobile seat according to claim 1, characterized in that: the area ratio of the left cavity to the right cavity is less than three times.

9. The cross beam for the light-weight new energy automobile seat according to claim 1, characterized in that: the steel strip is provided with round corners with smooth transition at all bending positions, and the radius of the round corners is more than four times of the thickness of the steel strip.