A method for manufacturing a hollow vehicle frame part includes: removing material from a first side of a first billet, creating a first inner shape of a target vehicle frame; removing material from a first side of a second billet to create a second inner shape of a target vehicle frame; bonding the billets together at the faying surfaces on first sides of the billets so the inner shapes face each other; and removing material by machining from the second sides of the first and second billets to create target outer shape of the vehicle frame part. The method further includes forming additional faying surfaces adjacent and at an angle to the faying surfaces on the first sides of the first and second billets, which faying surfaces together form a rabbet-type joint where the first billet and second billet are bonded. A corresponding us vehicle frame is also disclosed.

A superefficient box beam bicycle structure (SBBBS) having a box section, a right triangular section and a left triangular section. The right and left triangular sections are either integral with the box structure, or the triangular sections are attached to the box structure by riveting, bonding or welding. The box structure is preferably made of a sheet material and the parts that comprise the box structure are attached together by riveting, bonding or welding. The SBBBS interfaces with conventional bicycle components to function as a lightweight, strong bicycle frame. Additionally, the SBBBS can be manufactured as a one-piece design, or can utilize a hybrid construction design with an internal structure and reinforcing members at areas of high stress.

A superefficient box beam bicycle structure (SBBBS) having a box section, a right triangular section and a left triangular section. The right and left triangular sections are either integral with the box structure, or the triangular sections are attached to the box structure by riveting, bonding or welding. The box structure is preferably made of a sheet material and the parts that comprise the box structure are attached together by riveting, bonding or welding. The SBBBS interfaces with conventional bicycle components to function as a lightweight, strong bicycle frame. Additionally, the SBBBS can be manufactured as a one-piece design, or can utilize a hybrid construction design with an internal structure and reinforcing members at areas of high stress.

A bicycle frame structure that is manufactured by forming left and right panels and then bonding them in a pipe in/are configured to include a first fixing member fixed to the rear end portion of a chain stay and a hanger coupled to the first fixing member, being configured for rotating around a hinge pin, and having an axle slit formed in a predetermined direction.

A bicycle frame structure has a drop-out and includes: a fixing bracket having a rail groove formed in a frontward and rearward direction and fixed to one side of the frame; a movement member mounted to the fixing bracket to be movable forward and backward along the rail groove; a drop plate fixed to the movement member and having a drop-out formed therein for fixing a wheel; and an adjustment bolt screw-engaged by penetrating one side of the movement member. A front end of the adjustment bolt is supported by a fixing support formed in the fixing bracket. The movement member is moved along the rail groove according to rotation of the adjustment bolt.

A bicycle frame structure has a drop-out and includes: a fixing bracket having a rail groove formed in a frontward and rearward direction and fixed to one side of the frame; a movement member mounted to the fixing bracket to be movable forward and backward along the rail groove; a drop plate fixed to the movement member and having a drop-out formed therein for fixing a wheel; and an adjustment bolt screw-engaged by penetrating one side of the movement member. A front end of the adjustment bolt is supported by a fixing support formed in the fixing bracket. The movement member is moved along the rail groove according to rotation of the adjustment bolt.

A box beam bicycle structure (BBBS) having a box section, a right triangular section and a left triangular section. The right and left triangular sections are either integral with the box structure, or the triangular sections are attached to the box structure by riveting, bonding or welding. The box structure is preferably made of a sheet material and the parts that comprise the box structure are attached together by riveting, bonding or welding. The BBBS interfaces with bicycle components to function as a lightweight, strong bicycle frame. Additionally, the BBBS can be manufactured as a one-piece design, or can utilize a hybrid construction design with an internal structure and reinforcing members at areas of high stress.

The present disclosure proposes a part of a cycle frame, such as a bicycle frame for example, and also a part of a cycle fork. The part of the cycle frame or of the cycle fork comprises a core (10) and at least two shells (11, 12) that surround the core and are fixed to the core without being fixed directly to each other.

The present disclosure also relates to a method to assemble a cycle frame or a part of a cycle frame or a cycle fork or a part of a cycle fork.

A bicycle frame structure that is manufactured by forming left and right panels and then bonding them in a pipe in/are configured to include a first fixing member fixed to the rear end portion of a chain stay and a hanger coupled to the first fixing member, being configured for rotating around a hinge pin, and having an axle slit formed in a predetermined direction.

A bicycle frame structure has a drop-out and includes: a fixing bracket having a rail groove formed in a frontward and rearward direction and fixed to one side of the frame; a movement member mounted to the fixing bracket to be movable forward and backward along the rail groove; a drop plate fixed to the movement member and having a drop-out formed therein for fixing a wheel; and an adjustment bolt screw-engaged by penetrating one side of the movement member. A front end of the adjustment bolt is supported by a fixing support formed in the fixing bracket. The movement member is moved along the rail groove according to rotation of the adjustment bolt.