Wheel cover lap joint structure and electric automobile

Abstract

The utility model discloses a wheel cover lap joint structure and an electric automobile. The wheel cover lap joint structure comprises an inner plate, the inner plate comprises a first surface and a second surface which are opposite, and the inner plate has a first thickness t1; and an outer panel made of an aluminum alloy and having a second thickness t2, the outer panel being configured to surround the inner panel at an edge of the inner panel and to form a cross-section extending along the first surface and beyond the edge of the inner panel, followed by folding back and extending along the second surface, the cross-section having a hem thickness them, the edge covering thickness t covers the edge gt; t1 + 2t2. The bending amplitude of the material is enlarged by increasing the thickness of the covered edge, so that the material is prevented from reaching the performance limit in the bending process, and the outer plate is prevented from cracking.

Description

Technical Field

[0001] The present application relates to the field of automobile manufacturing, and in particular to a wheel cover overlapping structure and an electric vehicle comprising the wheel cover overlapping structure. Background Art

[0002] The outer panels made of hardened alloy materials will crack during the bending process due to exceeding the material performance limit. In the wheel cover lap joint structure of the vehicle, the outer panel has high side impact strength requirements, so high-strength materials are selected and the sheet material has a certain thickness. There are also hemming factor requirements corresponding to the selected high-strength materials. Before hemming, the wheel cover lap joint structure is pre-hung with the body, and after hemming, the gluing process is implemented. However, various limitations have led to the use of a simple flat wrapping process that challenges the material hemming performance limit and is difficult to meet the body process pre-hung and coating gluing requirements. Utility Model Content

[0003] One aspect of the present application is to provide a wheel cover overlap structure that can meet the material performance limit, which includes an inner panel, the inner panel includes a first surface and a second surface opposite to each other, and has a first thickness t1; and an outer panel, the outer panel is made of an aluminum alloy and has a second thickness t2, the outer panel is configured to surround the inner panel at the edge of the inner panel to form a cross section extending along the first surface and beyond the edge of the inner panel, then folding back and extending along the second surface, the cross section having a rim thickness t 包边 , the edge thickness t 包边 >t1+2t2.

[0004] In an embodiment of the wheel arch overlap structure, the inner panel is made of aluminum alloy.

[0005] In an embodiment of the wheel arch overlap structure, the outer panel and the inner panel are made of 6000 series aluminum alloy.

[0006] In an embodiment of a wheel arch overlap structure, the outer panel and the inner panel are made of an aluminum alloy with a T8 tensile strength ≥ 290 MPa.

[0007] In an embodiment of the wheel arch overlap structure, the outer panel is made of 6000BR aluminum alloy or 6000HS aluminum alloy, and the inner panel is made of 6000HS aluminum alloy.

[0008] In an embodiment of a wheel cover overlap structure, the first thickness t1 is in the range of 1.5 to 2 mm, and the second thickness t2 is in the range of 1.5 to 2 mm.

[0009] In an embodiment of a wheel cover overlap structure, the edge thickness t 包边 The size is in the range of 7 to 9 mm.

[0010] In an embodiment of a wheel cover overlap structure, the outer panel includes a third surface and a fourth surface relative to each other, wherein the third surface is located inside the cross section, and the fourth surface is located outside the cross section, the cross section includes a first straight line segment along the first surface and a second straight line segment along the second surface, and an expansion segment and a contraction segment between the first straight line segment and the second straight line segment, a bending radius R1 of the expansion segment at the third surface is in the range of 2 to 3 mm, and a bending radius R2 of the expansion segment at the fourth surface is in the range of 3.5 to 4.5 mm.

[0011] In an embodiment of the wheel house overlap structure, the outer panel is connected to the vehicle floor.

[0012] Another aspect of the present application is to provide an electric vehicle, which includes the wheel cover overlap structure described in any one of the aforementioned embodiments.

[0013] The size of the hemming thickness is set to t 包边 >t1+2t2. By increasing the thickness of the hemming, the bending range of the material is enlarged, thereby preventing the material from reaching the performance limit during bending, thereby preventing the outer panel from cracking. The wheel cover overlap structure involved in the present application uses a bake-hardened high-strength alloy, and the hemming factor after hemming can reach the requirement of not more than 0.7. The wheel cover overlap structure has improved molding quality and meets the process requirements before and after hemming.

[0014] The electric vehicle involved in the present application has an improved body quality and can meet the dual requirements of product structure design and vehicle performance.

[0015] Other aspects and features of the present application will become apparent from the following detailed description with reference to the accompanying drawings. It should be understood, however, that the drawings are designed for illustrative purposes only and are not intended to limit the scope of the present application, as reference should be made to the appended claims. It should also be understood that the drawings are intended only to conceptually illustrate the structures and processes described herein and, unless otherwise indicated, are not necessarily drawn to scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application will be more fully understood by referring to the following detailed description of specific embodiments in conjunction with the accompanying drawings, in which the same reference numerals in the drawings always refer to the same elements in the drawings.

[0017] Figure 1 A schematic diagram of an embodiment of a wheel cover overlap structure involved in the present application;

[0018] Figure 2 It is a schematic diagram of another embodiment of the wheel cover overlap structure involved in the present application. DETAILED DESCRIPTION

[0019] In order to help those skilled in the art to accurately understand the subject matter for which protection is sought in the present application, the specific implementation of the present application is described in detail below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of an embodiment of the wheel arch overlapping structure involved in the present application. The wheel arch overlapping structure includes an inner panel 10 and an outer panel 12. The inner panel 10 includes a first surface 14 and a second surface 16 opposite to each other, and has a first thickness t1. The outer panel 12 includes a third surface 18 and a fourth surface 20 opposite to each other, and has a second thickness t2. The outer panel 12 is configured to surround the inner panel 10 at the edge of the inner panel 10 and form a cross-section extending along the first surface 14 and beyond the edge of the inner panel 10, then folding back and extending along the opposite surface of the inner panel 10, that is, the second surface 16. The third surface 18 is inside the cross-section, and the fourth surface 20 is outside the cross-section. The cross-section has an edge thickness t 包边 The thickness of the hemming is set to t 包边 >t1+2t2. Compared with other forms such as flat edging structures, the present application increases the bending range of the material by increasing the edging thickness, thereby avoiding reaching the performance limit. In addition, the lap joint structure involved in the present application is a wheel cover lap joint structure, which is different from the edging structure of other parts of the vehicle body, such as the edging of the engine hood of a car. The wheel cover lap joint structure has side impact strength requirements, so cemented carbide and plate materials with a certain thickness are used. At the same time, in terms of process, a pre-hanging process is performed before edging, and a gluing process is performed after edging. Therefore, the particularity of the wheel cover part requires its edging structure to adapt to high-strength application scenarios.

[0021] In one embodiment, the outer panel 12 is made of aluminum alloy. In another embodiment, the outer panel 12 and the inner panel 10 are both made of aluminum alloy. In yet another embodiment, the outer panel 12 and the inner panel 10 are both made of 6000 series aluminum alloy. In yet another embodiment, the outer panel 12 and the inner panel 10 are made of aluminum alloy with a tensile strength of ≥290Mpa in T8 state. T8 represents the stable state of aluminum after solution treatment, cold work hardening and artificial aging, so the outer panel 12 and the inner panel 10 are made of high-strength material. The grades of 6000 series aluminum alloy include but are not limited to 6000IH, 6000BR, 6000HS, 6000IF, 6000CL, etc. In one embodiment, the outer panel 12 is made of 6000BR aluminum alloy or 6000HS aluminum alloy, and the inner panel 10 is made of 6000HS aluminum alloy.

[0022] The thickness of the inner plate 10, i.e., the first thickness t1, is in the range of 1.5 to 2 mm, and the thickness of the outer plate 12, i.e., the second thickness t2, is in the range of 1.5 to 2 mm. 包边The size is in the range of 7 to 9 mm. The cross section has a roughly water drop shape. Figure 2 As shown, the cross section is composed of a plurality of segments indicated by dotted lines, including a first straight segment 22 along the first surface 14 and a second straight segment 24 along the second surface 16, and an expansion segment 26 and a contraction segment 28 between the first straight segment 22 and the second straight segment 24. The expansion segment 26 and the contraction segment 28 are generally arc-shaped. The bending radius R1 of the expansion segment 26 at the third surface 16 is in the range of 2 to 3 mm, and the bending radius R2 of the expansion segment 26 at the fourth surface 20 satisfies the relationship R2=R1+t2 with the bending radius R1, and the size of R2 is in the range of 3.5 to 4.5 mm. In one embodiment, the first thickness t1 is 2 mm, the second thickness t2 is 2 mm, the bending radius R1 at the third surface 16 is 2.5 mm, and the bending radius R2 at the fourth surface 20 is 4.5 mm.

[0023] In one embodiment, the outer panel 12 is connected to the vehicle floor and the wheel arch overlap structure is applied to the rear wheels.

[0024] The present application also relates to an electric vehicle, the body of which is made of aluminum alloy, and the electric vehicle comprises the wheel cover overlap structure described in any one of the above embodiments.

[0025] Although specific embodiments of the present application have been shown and described in detail to illustrate the principles of the present application, it should be understood that the present application can be implemented in other ways without departing from such principles.

Claims

1. A wheel cover overlap structure, characterized in that include: an inner panel (10) comprising a first surface (14) and a second surface (16) opposite to each other and having a first thickness t1; and An outer plate (12), the outer plate (12) being made of an aluminum alloy and having a second thickness t2, the outer plate (12) being configured to surround the inner plate (10) at the edge of the inner plate (10) and to form a cross section extending along the first surface (14) and beyond the edge of the inner plate (10), then folding back and extending along the second surface (16), the cross section having a rim thickness t 包边 , the edge thickness t 包边 >t1+2t2.

2. The wheel cover overlap structure according to claim 1, characterized in that: The inner plate (10) is made of aluminum alloy.

3. The wheel cover overlap structure according to claim 2, characterized in that: The outer plate (12) and the inner plate (10) are made of 6000 series aluminum alloy.

4. The wheel cover overlap structure according to claim 2 or 3, characterized in that: The outer plate (12) and the inner plate (10) are made of an aluminum alloy with a tensile strength of ≥290 MPa in T8 state.

5. The wheel cover overlap structure according to claim 4, characterized in that: The outer plate (12) is made of 6000BR aluminum alloy or 6000HS aluminum alloy, and the inner plate (10) is made of 6000HS aluminum alloy.

6. The wheel cover overlap structure according to claim 1, characterized in that: The first thickness t1 is within a range of 1.5 to 2 mm, and the second thickness t2 is within a range of 1.5 to 2 mm.

7. The wheel cover overlap structure according to claim 6, characterized in that: The edge thickness t 包边 The size is in the range of 7 to 9 mm.

8. The wheel cover overlap structure according to claim 1, characterized in that: The outer panel (12) includes a third surface (18) and a fourth surface (20) opposite to each other, wherein the third surface (18) is located inside the cross section and the fourth surface (20) is located outside the cross section, the cross section includes a first straight section (22) along the first surface (14) and a second straight section (24) along the second surface (16), and an expansion section (26) and a contraction section (28) between the first straight section (22) and the second straight section (24), the bending radius R1 of the expansion section (26) at the third surface (18) is in the range of 2 to 3 mm, and the bending radius R2 of the expansion section (26) at the fourth surface (20) is in the range of 3.5 to 4.5 mm.

9. The wheel cover overlap structure according to any one of claims 1 to 8, characterized in that: The outer panel (12) is connected to the vehicle floor.

10. An electric vehicle, characterized in that The electric vehicle comprises a wheel cover overlap structure according to any one of claims 1-9.

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