Aircraft component coupling assembly and coupler for aircraft components

A coupler for aircraft components that couples a first plate structure and a second plate structure, the first plate structure including a first insertion hole and a first serration located on a first outer surface of the first plate structure and surrounding the first insertion hole, the second plate structure including a second insertion hole having an inner diameter smaller than an inner diameter of the first insertion hole, the coupler comprising:

• a contact structure including a second serration and a third insertion hole, the second serration being contacted with the first outer surface of the first plate structure to mesh with the first serration of the first plate structure;
• a shaft structure which contacts an inner circumferential surface of the second insertion hole and an inner circumferential surface of the third insertion hole and does not contact an inner circumferential surface of the first insertion hole when inserted through the first, second and third insertion holes, the shaft structure including a fixed engagement portion that is fixedly engaged with one of a second outer surface of the second plate structure and a third outer surface of the contact structure;
• and
• a pressing structure that is engaged with the shaft structure to press an other of the second outer surface of the second plate structure and the third outer surface of the contact structure.

A coupling assembly, comprising:

• a frame including a first insertion hole and a first serration, the first insertion hole having a first diameter, and the first serration being located on a first outer surface of the frame and surrounding the first insertion hole;
• a beam including a second insertion hole having a second diameter smaller than the first diameter;
• and
• a coupler that couples the frame to the beam, the coupler including:
• a contact plate including a second serration and a third insertion hole, the second serration contacting the first outer surface of the frame and meshing with the first serration of the frame,
• a shaft which contacts an inner circumferential surface of the second insertion hole and an inner circumferential surface of the third insertion hole and does not contact an inner circumferential surface of the first insertion hole when inserted through the first insertion hole, the second insertion hole and the third insertion hole, the shaft including a fixed engagement portion fixedly engaged with one of a second outer surface of the beam and a third outer surface of the contact plate, and
• a pressing nut engaged with the shaft and pressing an other of the second outer surface of the beam and the third outer surface of the contact plate, wherein
• the first outer surface of the frame faces away from the beam.