KR-102962473-B1 - DOOR ASSEMBLY FOR VEHICLE MADE OF DIFFERENT MATERIALS WITH DIFFERENT COEFFICIENTS OF THERMAL EXPANSION

KR102962473B1KR 102962473 B1KR102962473 B1KR 102962473B1KR-102962473-B1

Abstract

The present invention relates to a vehicle panel assembly, and more specifically, to a vehicle panel assembly made of heterogeneous materials having different thermal expansion rates, having a structure that absorbs thermal expansion deformation between an outer panel and an inner panel having different thermal expansion rates. A vehicle panel assembly made of different materials having different thermal expansion rates according to the present invention comprises an outer panel (10), an inner panel (20) having a perimeter joined to the perimeter of the outer panel (10) and made of a material having a thermal expansion rate different from that of the outer panel (10), and at least one deformation-absorbing panel (30) (40) connected to at least one of the outer panel (10) and the inner panel (20) at the perimeter of the outer panel (10) and the inner panel (20), and absorbing the amount of thermal deformation due to temperature change of the outer panel (10) and the inner panel (20) when the outer panel (10) and the inner panel (20) undergo thermal deformation.

Inventors

최제원

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260508
Application Date: 20210111

Claims (20)

The outer panel and, An inner panel having a perimeter joined to the perimeter of the outer panel and made of a material having a thermal expansion rate different from that of the outer panel, and It includes at least one deformation-absorbing panel that is connected to at least one of the outer panel and the inner panel at the perimeter of the outer panel and the inner panel, and absorbs the amount of thermal deformation due to temperature change of the outer panel and the inner panel when the outer panel and the inner panel undergo thermal deformation. A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that the deformation-absorbing panel is integrally formed with the outer panel or the inner panel.
In paragraph 1, A coupling portion is formed that protrudes from the outer panel or the inner panel and has a coupling groove formed at its end, and A vehicle panel assembly made of different materials having different thermal expansion rates, characterized in that a fitting projection is formed on one end of the deformation-absorbing panel, and the fitting projection is fitted into the coupling groove so that the deformation-absorbing panel is coupled to the coupling part.
In paragraph 2, A vehicle panel assembly made of different materials having different thermal expansion rates, characterized in that the inner side of the joint portion is extended to form a flange portion at the portion where the joint groove is formed in the joint portion.
In paragraph 1, The above deformation-absorbing panel is, It is fitted and combined into either the outer panel or the inner panel. A vehicle panel assembly made of different materials with different thermal expansion rates, characterized by being fastened to the other one of the outer panel and the inner panel by a fastening member.
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In paragraph 1, The above deformation-absorbing panel is, A vehicle panel assembly made of heterogeneous materials with different thermal expansion rates, characterized by a cross-section formed to be bent and slit holes that deform upon thermal deformation along the longitudinal direction being continuously formed.
In paragraph 6, The above slit hole is, A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that the longitudinal width of the deformation-absorbing panel is formed to be larger than the width in the width direction of the deformation-absorbing panel.
In paragraph 1, A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that the thermal expansion rate of the outer panel is greater than the thermal expansion rate of the inner panel.
In paragraph 1, A coupling portion is formed that protrudes from the outer panel or the inner panel and has a coupling groove formed at its end, and A vehicle panel assembly made of different materials having different thermal expansion rates, characterized in that the deformation-absorbing panel is coupled to the coupling part by a fastening member that fastens one end of the deformation-absorbing panel to the coupling part.
In Paragraph 9, A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that the deformation-absorbing panel is provided as one between the outer panel and the inner panel, is fitted and coupled to the outer panel, and is fastened to the inner panel.
In paragraph 1, The above deformation-absorbing panel is, A vehicle panel assembly made of different materials having different thermal expansion rates, characterized by being provided between the outer panel and the inner panel to absorb thermal deformation in at least two of the longitudinal, width, and height directions of the vehicle.
In Paragraph 11, The above deformation-absorbing panel is, A first deformation-absorbing panel fitted and coupled to the above outer panel, and A vehicle panel assembly made of different materials having different thermal expansion rates, characterized by including a second deformation-absorbing panel formed to be bent in the opposite direction to the first deformation-absorbing panel, fitted into the first deformation-absorbing panel, and fastened to the inner panel.
In Paragraph 12, A vehicle panel assembly made of heterogeneous materials with different thermal expansion rates, characterized in that slit holes that deform upon thermal deformation are continuously formed along the longitudinal direction in each of the first deformation-absorbing panel and the second deformation-absorbing panel.
In Paragraph 13, A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that the surface where the slit hole is formed in the first deformation-absorbing panel and the surface where the slit hole is formed in the second deformation-absorbing panel are perpendicular to each other.
In Paragraph 12, The first deformation absorption panel has a fitting projection formed at its end and is fitted into a coupling groove formed in the outer panel, and A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that the second deformation-absorbing panel is fastened to the end of the inner panel by a fastening member.
In Paragraph 12, A vehicle panel assembly made of different materials having different thermal expansion rates, characterized in that a fitting groove is formed in the first deformation-absorbing panel and a fitting projection is formed in the second deformation-absorbing panel so that the first deformation-absorbing panel and the first deformation-absorbing panel are joined.
In paragraph 1, A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that a flexible vinyl sealing member is attached to the inner surface of the deformation-absorbing panel.
In paragraph 1, A vehicle panel assembly made of different materials with different thermal expansion rates, characterized in that a deformation-absorbing panel is provided in a portion along the perimeter of the outer panel and the inner panel, and the outer panel and the inner panel are bonded to each other with an adhesive in the remaining portion.
In paragraph 1, The above panel assembly is, A vehicle panel assembly made of different materials with different thermal expansion rates, characterized by being a door assembly installed on the side of a vehicle for passengers to board and alight.
The outer panel and, An inner panel having a perimeter joined to the perimeter of the outer panel and made of a material having a thermal expansion rate different from that of the outer panel, and It includes at least one deformation-absorbing panel that is connected to at least one of the outer panel and the inner panel at the perimeter of the outer panel and the inner panel, and absorbs the amount of thermal deformation due to temperature change of the outer panel and the inner panel when the outer panel and the inner panel undergo thermal deformation. A mounting portion is provided at the end of the outer panel or the inner panel to which the deformation-absorbing panel is fitted and coupled, and The above mounting portion is bonded to the outer panel or the inner panel, and A vehicle panel assembly made of different materials having different thermal expansion rates, characterized in that an extension portion is formed parallel to the outer panel or the inner panel in the mounting portion, and an adhesive is applied to the extension portion so that the extension portion is bonded to the outer panel or the inner panel.

Description

Door assembly for vehicle made of different materials with different coefficients of thermal expansion The present invention relates to a vehicle panel assembly, and more specifically, to a vehicle panel assembly made of heterogeneous materials having different thermal expansion rates, having a structure that absorbs thermal expansion deformation between an outer panel and an inner panel having different thermal expansion rates. The vehicle is equipped with a panel assembly in which multiple panels are joined together. For example, a door assembly for passengers to board and alight is installed on the side of a vehicle, and said door assembly is formed by assembling an outer panel and an inner panel together. Typically, the outer panel and the inner panel are made of metal sheet material, and after applying a hemming sealer or structural adhesive to the perimeter of the outer panel and the inner panel, the outer panel and the inner panel are assembled through a hemming process. Recently, in order to lighten the door assembly and the vehicle, there have been attempts to make either the outer panel (110) or the inner panel (120), for example, the outer panel (110), a lightweight synthetic resin. The outer panel (110) and the inner panel (120) are bonded together with an adhesive (151) to form a door assembly (100). If the outer panel (110) of the door assembly (100) is made of synthetic resin instead of metal, the weight of the door assembly (100) and the vehicle is reduced, and accordingly, the fuel efficiency of the vehicle can be improved. However, if the outer panel (110) and the inner panel (120) are made of different materials, the coefficient of thermal expansion of the outer panel (110) and the coefficient of thermal expansion of the inner panel (120) are different, so the amount of deformation of the outer panel (110) and the amount of deformation of the inner panel (120) differ even for the same temperature change. When the outer panel (110) is made of synthetic resin and the inner panel (120) is made of metal plate, the thermal expansion coefficient of the synthetic resin is higher than that of the metal, so the amount of thermal deformation of the outer panel (110) is greater than the amount of thermal deformation of the inner panel (120). Therefore, in the summer, the amount of expansion of the outer panel (110) is greater than the amount of expansion of the inner panel (120), so the door assembly (100) is deformed to become convex toward the outer panel (110) (see FIG. 5). In the winter, the amount of contraction of the outer panel (110) is greater than the amount of contraction of the inner panel (120), so the door assembly (100) is deformed in the opposite direction. Consequently, the door assembly (100) is deformed and fails to maintain its initial shape. When this phenomenon is repeated and deformation accumulates, cracks and fractures occur at the bonding site between the outer panel (110) and the inner panel (120), causing the outer panel (110) and the inner panel (120) to separate. FIG. 1 is a perspective view illustrating a door assembly according to the prior art. FIG. 2 is an exploded perspective view illustrating a door assembly according to the prior art. FIG. 3 is a cross-sectional view along line I-I of FIG. 1 showing the initial state of a door assembly according to the prior art. FIG. 4 is a cross-sectional view illustrating the shape in which an outer panel and an inner panel are separated at the perimeter of a door assembly according to the prior art. FIG. 5 is a cross-sectional view along line I-I of FIG. 1 showing a thermally deformed state of a door assembly according to the prior art. FIG. 6 is a perspective view illustrating a vehicle panel assembly made of heterogeneous materials having different coefficients of thermal expansion according to the present invention. FIG. 7 is an exploded perspective view illustrating a vehicle panel assembly made of heterogeneous materials with different thermal expansion coefficients according to the present invention. FIG. 8 is a cross-sectional view along line II-II of FIG. 6. FIG. 9 is an enlarged cross-sectional view illustrating the area where an outer panel and an inner panel are joined in a vehicle panel assembly made of different materials having different thermal expansion rates according to the present invention. FIG. 10 is an enlarged cross-sectional view showing the disassembled portion where the outer panel and the inner panel are joined in a vehicle panel assembly made of different materials with different thermal expansion rates according to the present invention. FIG. 11 is an exploded cross-sectional view along line II-II of FIG. 6. FIG. 12 is an enlarged perspective view of a key part of a door assembly to which a vehicle panel assembly made of different materials having different thermal expansion rates according to the present invention is applied. FIGS. 13a and 13b are schematic diagrams illustrating the deformation s