A vehicle door includes an outer panel, an inner panel including an inner wall portion, a side wall portion, and a flange portion, an impact beam provided so to extend between the outer panel and the inner wall portion on a surface parallel to inner wall portion, and a bracket including a fixed portion, a joint portion, and a recessed portion. The recessed portion recesses toward an inner-panel side such that a tip end of the impact beam is distanced from the bracket. In an extending direction of the impact beam, a yield strength of a region from the fixed portion to a tip end position of the impact beam for a load applied from the outer panel-side is lower than a yield strength of a region from the tip end position of the impact beam to the joint portion for the load applied from the outer-panel side.

A door impact beam that is disposed across a door frame of a vehicle and a method of manufacturing the door impact beam may include a body formed in a pipe shape and concaved on a side facing an external side of the vehicle; and coupling portions integrally extending from first and second end portions of the body to be coupled to the door frame through spot welding.

An apparatus for manufacturing a bracket-integrated double-layer door impact beam is provided. The apparatus includes a lower mold having a lower cavity formed with a base material molded to have a U-shaped cross section and a predetermined length. The base material is seated on the lower cavity. A lower electrode terminal is disposed in the lower mold to contact the base material. An upper mold has an upper cavity therein and is coupled with the lower mold to pressurize both end portions of the U-shaped cross section of the base material inward to form the base material with an O-shaped cross section. An upper electrode terminal is disposed in the upper mold to contact the base material.

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.

A vehicle door includes a door inner, a beam having a first end and a second end spaced from each other along a longitudinal axis, and a bracket. The bracket is fixed to the door inner and the beam, with the bracket between the door inner and the first end of the beam. The beam includes a cutout extending along the longitudinal axis to the first end.

A door structure of a vehicle, capable of reliably transmitting a load, is provided. A rear side door (1) includes an inner panel (2) and an elongated door beam (4) that is attached to an outer side of the inner panel (2) in a vehicle width direction of a vehicle body and arranged along a front-rear direction of the vehicle body. The door beam (4) includes a first plate portion (11) of a first bracket (10), which has a first surface intersecting an axis along the vehicle width direction, and a vehicle width direction plate portion (21) of a second bracket (20), which has a second surface intersecting an axis along the front-rear direction of the vehicle body. The door beam (4) is joined to the inner panel (2) via both the first plate portion (11) and a second plate portion (12).

A panel door applied for a vehicle including a stiffness member made of a plastic material and integrally formed on an internal surface of the panel door, includes an external panel, an internal panel coupled to the external panel, and a stiffness member formed to connect a frame forming a circumference and stiffness elements provided for reinforcing stiffness inside the frame and coupled to at least one of the external panel and the internal panel.

A door impact beam for a door of a motor vehicle includes a first fastening portion configured to be fastened to a first fastening intersection of the door and a second fastening portion configured to be fastened to a second fastening intersection of the door. A profiled portion extends between the first fastening portion and the second fastening portion. The profiled portion is designed at least in sections as a hollow profile with two side walls disposed opposite to each other and two connecting walls disposed opposite to each other which connect the side walls to each other. The connecting walls have an outwardly directed convex curvature.

A spacer is provided for mounting on a vehicle impact beam. The spacer includes a first surface having a first radius of curvature centered on a first axis, and a second surface opposite the first surface, the second surface having a second radius of curvature centered on a second axis extending parallel to the first axis and spaced apart from the first axis.

A door impact beam for a vehicle includes a beam main body 2 and an attaching portion 3 formed of first and second brackets 4 and 5, the first bracket 4 is coupled to the second bracket 5 by a coupling portion 20 to enable absorbing a relative movement due to difference in thermal expansion between the beam main body 2 and the components 6 of the vehicle door, a first locking hole 11 is bored in one of the first and second brackets 4 and 5 and a second locking hole 12 is bored in the other bracket, the first and second locking holes 11 and 12 are adapted to be locked by a temporarily fixing member 13 at a normal temperature and the temporarily fixing member 13 is adapted to be softened at a predetermined temperature or higher, and the second locking hole 12 includes an engaging hole 12a adapted to be engaged with the temporarily fixing member at a normal temperature and a slit 12b which is smaller in width than the maximum inner diameter of the engaging hole 12a.