A lattice structure and system for absorbing energy, damping vibration, and reducing shock. The lattice structure comprises a plurality of unit cells, each unit cell comprising a plurality of rib elements with at least a portion of the rib elements including a solid bendable hinge portion for converting energy into linear motion along a longitudinal axis of the respective rib element.

The present impact absorbing member includes: a hat-shaped member having a hat top section; and a plate-shaped member facing the hat top section. A deformation guidance section is provided on a wall section of at least one of the hat top section and the plate-shaped member. The deformation guidance section includes: a first high strength section having relatively higher buckling resistance in the wall section; and a pair of low strength sections having relatively lower buckling resistance and arranged on both sides of the first high strength section therebetween in a view along the longitudinal direction. Furthermore, the impact absorbing member includes a pair of second high strength sections disposed on both sides of the deformation guidance section to be adjacent to the pair of low strength sections in a view along the longitudinal direction and having a higher buckling strength relative to the low strength sections.

An adjustable circular tube energy absorption/storage mechanism based on a paper-cut structure is disclosed according to the present application, which belongs to the technical field of advanced intelligent structure. The mechanism is based on the conventional circular tube and obtained by partially cutting the circular tube. The direction of the slits is along the axial direction of the circular tube. Multiple circular tubes may be arrayed in a specific way according to the actual application requirements. When the circular tube is subjected to axial impact force, the cutting section of the circular tube may deform in a specific direction, the circular tube realizes structural energy absorption and energy storage through local buckling deformation, and after the external force is removed, the circular tube recovers from the deformation and releases stored energy.

A footrest support structure includes a footrest main body 10 on which a foot of an occupant is placeable, a panel member 14 of a vehicle interior floor, and a shock absorbing member 15. The panel member 14 has an inclined portion 14b inclined forward and upward from the horizontal portion 14a. The shock absorbing member 15 is interposed between the panel member 14 and the footrest main body 10. The inclined portion 14b of the panel member 14 has a recessed portion 18 that is recessed downward. The shock absorbing member 15 has a thinned portion 21 in a portion facing the recessed portion 18, which is thinner than other portions. A deformation-allowing space 30 is formed between the recessed portion 18 and the shock absorbing member 15.

A steering column assembly includes a jacket assembly and an energy absorption strap assembly. The energy absorption strap assembly has a first energy absorption strap and a second energy absorption strap. The first energy absorption strap has a first strap body that extends between a first strap first end and a first strap second end. The first strap body defines a first opening and a second opening. The second energy absorption strap has a second strap body that extends between a second strap first end and a second strap second end. The second strap first end is at least partially received within the first opening and the second strap second end is at least partially received within the second opening.

An inversion-formed double-walled tube includes an outer tube having an outer wall thickness, an inner tube disposed inside the outer tube and having an inner wall thickness, and a transition portion connecting the inner tube and the outer tube. In this arrangement, at least one of the inner and outer wall thicknesses varies along a length of the double-walled tube. The inversion-formed double-walled tube may be configured as an inversion tube type energy absorber and as an energy absorbing inversion tube assembly.

An impact attenuator including an impact head, coupled to a first end of an energy absorption body, which energy absorption body is arranged for fixation to an external structure at a second end opposing the first end of the energy absorption body, configured to at least partly absorb or dissipate energy from a collision of an object with the impact head, and including a first part and a second part extending substantially lengthwise behind each other, wherein the first and second part are mutually moveable and including a first and a second cutting edge, wherein, the first cutting edge is arranged for splitting the first part of the energy absorption body upon impact of an object colliding with the impact head, and the second cutting edge is arranged for consecutively splitting the second part of the energy absorption body upon impact of an object colliding with the impact head.

A landing gear includes a pair of skids, a cross tube and a stiffening portion. The pair of skids is arranged in parallel with a front-rear axis of an airframe of a rotary wing aircraft. The cross tube is attached to the airframe and coupling the pair of skids to each other. The cross tube includes curved portions located closer to end portions of the cross tube than to portions of the cross tube attached to the airframe. The stiffening portion suppresses flattening of the cross tube and is arranged in at least one of internal spaces of the curved portions or a stiffened portion located between a pair of curved portions. The stiffening portion includes an enlarged diameter portion which increases in diameter by an axial fastening power acting in an axial direction of the cross tube, and a fastening portion configured to generate the axial fastening power.

A support bracket is arranged inside a slit of an outer column and joined to the inner column so as to be able to detach due to an impact load applied to the inner column at the time of a secondary collision. A base portion of an impact absorbing member is attached to the inner column so as to displace together with the inner column when the inner column displaces toward the front, and a folded portion of the impact absorbing member is made to face a jerking portion of the support bracket in the front-rear direction.

A structure is achieved that makes it easy to increase the absorbed amount of an impact load applied to the steering wheel in the event of a secondary collision.

A support bracket 18 is arranged inside a slit 25 of an outer column 21 and joined to the inner column 20 so as to be able to detach due to an impact load applied to the inner column 20 at the time of a secondary collision. A base portion 79 of an impact absorbing member 19 is attached to the inner column 20 so as to displace together with the inner column 20 when the inner column 20 displaces toward the front, and a folded portion 78 of the impact absorbing member 19 is made to face a jerking portion 61 of the support bracket 18 in the front-rear direction.