A vehicle door structure includes: a door hinge member mounted on a vehicle body; a door inner panel that constitutes a side door of an automobile; a door outer panel that is mounted on an outer side of the door inner panel in a vehicle width direction, and constitutes the side door of the automobile; and a door impact beam that is disposed between the door inner panel and the door outer panel, a first end side of the door impact beam being mounted on the door inner panel through a mounting member, a second end side of the door impact beam being rotatably mounted on the door hinge member.

A method includes molding an outer impact beam made of carbon fiber reinforced plastics (CFRP) and separately molding an inner impact beam made of CFRP. The outer impact beam and the inner impact beam are coupled to each other to form an impact beam and the impact beam is coupled to an inner panel of a vehicle door.

A door of a vehicle may include a first door module forming a door skeleton; and a second door module coupled with the first door module and forming a door window, wherein the second door module includes a relatively lightweight material as compared to the first door module; and a reinforcement member is along an edge portion forming the door window of the second door module, reducing weight and cost of the door for the vehicle.

A door of a vehicle may include a first door module forming a door skeleton, a second door module coupled with the first door module and forming a door window, wherein the second door module may include a relatively lightweight material as compared to the first door module and a hollow portion is formed along an edge portion of the second door module forming the door window, reducing weight and cost of the door for a vehicle.

An electric vehicle has a frame configured with a cell module , a front anti-crash module and a rear module, each having a reticular structure formed by high-strength steel arms, welded together and each having a hollow structure with a quadrangular cross-section. A front axle unit and a rear axle unit each including an electric drive motor are associated with the front frame module and the rear frame module. The frame has a floor, which acts as a container for a battery pack for the electric drive motors of the vehicle.

A door beam includes an aluminum alloy extrusion body extended in a longitudinal direction and having a pair of webs and a pair of flanges to be positioned on an inner side and an outer side in a width direction of a vehicle body. The pair of webs connect the pair of flanges at joint portions of each of the pair of webs such that the pair of webs and the pair of flanges form a closed cross section in a direction perpendicular to the longitudinal direction, and the pair of webs do not have a welded portion.

A vehicle rear structure includes: an impact beam; a rocker outer rear and a rocker inner rear extending upward from a rear portion of a rocker; a rear wheel house outer including a front portion extending in the vehicle front-rear direction and placed between the rocker outer rear and the rocker inner rear; and a bulk. The bulk includes: a first wall provided between the rocker outer rear and the rocker inner rear and joined to the rocker outer rear; a second wall bending from the first wall to extend toward the rocker inner rear; and a third wall placed at a position where the third wall at least partially overlaps with the impact bean as viewed in a vehicle width direction, the third wall being bending from the second wall and joined to the front portion of the rear wheel house outer.

A metal pipe has a circular cross section with an outer diameter D and a length not less than 6D. The metal pipe includes a high-strength portion (1A) and low-strength portions (1B). The high-strength portion (1A) is disposed along the entire circumference of the metal pipe to extend a dimension, as measured in the longitudinal direction of the metal pipe, that is not less than (2/3)D and not more than 3D of the metal pipe. The high-strength portion (1A) has a yield strength not less than 500 MPa (or a tensile strength not less than 980 MPa). The low-strength portions (1B) are disposed along the entire circumference of the metal pipe to be arranged in the longitudinal direction of the metal pipe to sandwich the high-strength portion (1A). The low-strength portions (1B) have a yield strength of 60 to 85% of that of the high-strength portion (1A).

An impact beam structure of a CFRP door for a vehicle is disclosed. A outer impact beam and an inner impact beam are separately molded and then coupled to each other such that an impact beam is formed. The impact beam is coupled to an inner panel of the CFRP door for the vehicle.

This door inner panel is a door inner panel formed of a metal sheet and includes a first panel portion having a first top sheet portion and a first standing wall portion connected to the first top sheet portion, a second panel portion having a second top sheet portion disposed with a gap with the first top sheet portion of the first panel portion and a second standing wall portion connected to the second top sheet portion, a flange portion connected to the first standing wall portion and the second standing wall portion, and a flat sheet portion disposed between the first panel portion and the second panel portion, the first standing wall portion and the second standing wall portion respectively have a level difference portion, and both ends of the flat sheet portion are integrated with the flange portion or the level difference portions.