64results about "Elastic dampers" patented technology

This invention relates to the field of novel materials, specifically a novel metamaterial exhibiting both multi-stable state and negative Poisson's ratio properties. It comprises a concave hexagonal frame, two arc-shaped beams positioned on the upper and lower sides of the frame's inner cavity, and a vertical rod. The two arc-shaped beams are fixedly connected to the upper and lower ends of the vertical rod via their respective central portions. When the structure is subjected to a vertical compressive load, the frame's diagonal bracing rotates inward, contracting and compressing the ends of the arc-shaped beams, generating a significant negative Poisson's ratio effect. This process forces the arc-shaped beams to bend and deform towards the center, accompanied by energy dissipation. When the displacement reaches a critical threshold, the arc-shaped beams buckle and overturn, switching to a steady state. This invention, through specific geometric configurations and differentiated material layouts, achieves morphological self-repair after impact and reuse under low-intensity conditions. This metamaterial can be arranged as a two-dimensional periodic array as a unit cell.

Deformation element for occupant protection in a motor vehicle, comprising a pot-shaped hollow profile section (17, 19) with a side wall (21) arranged at least partially rotationally symmetrically about the pot axis (A), a pot bottom side (23) facing away from the crash, and a top side (25) facing the crash, wherein the side wall (21) of the pot-shaped hollow profile section (17, 19) has at least one helical structure (27, 28, 29), characterized in that the helical structure (27, 28, 29) formed in the side wall (21) is truss-like with struts (31) and intermediate openings (33), and that the struts (31) are tilted with respect to the pot axis (A) by an angle of attack (α1, α2, α3), such that the pot-shaped hollow profile section (17, 19) deforms upon application of a force (F) in the direction the pot axis (A) under a torsional movement (II) a , II b , II c ) the side wall (21) is deformed.

To provide an impact absorption member which can preferably absorb an impact itself while having rigidity to push out an occupant to a vehicle cabin inner side at an initial stage during a vehicle collision.SOLUTION: An impact absorption member includes: a first facing wall part 31 which is disposed facing a door trim 20; an inner wall part 32 extending from a peripheral end part of the first facing wall part 31 to a vehicle cabin outer side; a second facing wall part 33 which extends from a vehicle cabin outer end in the inner wall part 32 to an outer periphery direction side of the first facing wall part 31 and is disposed facing a door panel 10; an outer wall part 34 which extends from a peripheral end part of the second facing wall part 33 to a vehicle cabin inner side and encloses the inner wall part 32; and attachment parts 40, 50, 60 attached to the door trim 20.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of anti-impact protection. According to the snail shell imitating square tube improved anti-impact energy absorption structure and the application, the structural monomers or the structural modular array can be used for dynamic load protection. Under the action of an axial compression load, the structure realizes a multi-layer and progressive collapse path, and has low initial peak crushing force and staged and approximately linear increasing force-displacement response characteristics. According to the bionic structure, the energy absorption efficiency of the rectangular pipe is effectively improved under the condition that the mass and the manufacturing complexity are not increased, and the bionic structure is suitable for vehicle anti-collision systems, rail transit buffer devices and other anti-impact protection fields.

The present disclosure provides an impact absorbing member in which both load-bearing performance and weight reduction are further achieved. An impact absorbing member (3) comprises a long body part (1) having a cross section including: a top plate part (1A) having a recess (1Aa) at a position partway in the width direction; left and right vertical wall parts (1B) respectively connected to both end parts in the width (D1) direction of the top plate part (1A); and left and right flange parts (1C) connected to the lower end parts of the respective vertical wall parts (1B). An angle on an inner surface side formed by the top plate part (1A) and the vertical wall parts (1B) is less than 90°. The flange part (1C) extends upward such that the height thereof approaches the height of the top plate part (1A) toward a tip side from a root side connected to the vertical wall part (1B).

This invention discloses a high-energy-absorbing lightweight sandwich structure mimicking the elytra of a pine knot weevil and its preparation method, belonging to the field of additive manufacturing technology for lightweight energy-absorbing structures. The structure includes an upper panel, a lower panel, and a core layer structure disposed between them. The core layer structure is formed by splicing together an array of structural units. Each structural unit includes a central elliptical cavity and two hollow cylindrical supports on either side, with the elliptical cavity and the hollow cylindrical supports connected to form a load-bearing system. In the three-layer structure, the middle layer structural unit array is staggered along the axis of the elliptical cavity, and process communication holes are provided on the shared middle panel of adjacent layers. This structure can be integrally formed using selective laser melting, and features good energy absorption performance, reliable connection, and easy powder removal, making it suitable for UAV fuselages and other lightweight protective structures.

The application provides an adaptive buffering energy-absorbing protection structure, a device and a manufacturing method thereof, and relates to the technical field of buffering protection structures. The adaptive buffering energy-absorbing protection structure comprises a plurality of hollow structure cells. The hollow cavities of the hollow structure cells are communicated with the external environment through at least four open channels extending in different spatial directions. The solid parts of the hollow structure cells are jointly separated by the hollow cavities and the open channels to form a plurality of support structures. The plurality of hollow structure cells are arranged in an array, and the support structures of one of two adjacent hollow structure cells extend into the open channels of the other one, so that the two adjacent hollow structure cells form movable embedded connections in a manner of extending into each other. The movable embedded connections allow the two adjacent hollow structure cells to slide relative to each other.

Disclosed herein is a method for forming a reinforcing structural element for a vehicle, the method comprising the steps of: preparing a thin-walled hollow member (102); supporting at least a portion of the thin-walled hollow member (104); and overmolding a structural element material onto at least a portion of the thin-walled hollow member to form a reinforcing structural element (106).

The application provides a metal energy-absorbing thin-walled pipe with a negative Poisson's ratio effect and a design method thereof, comprising a thin-walled pipe body, the thin-walled pipe body is composed of a plurality of unit bodies which are sequentially fixedly connected in a head-to-tail mode from top to bottom, each unit body comprises a pipe and a joint which are fixedly connected, the joint is fixed at the bottom of the pipe, and the wall thickness of the pipe is greater than the wall thickness of the joint. In the technical scheme, the thickness of the metal pipe and the connected joint is inconsistent, the thickness of the metal pipe is greater than the thickness of the connected joint, the metal pipe has better bending strength than a conventional metal pipe with the same thickness when subjected to a bending load, is not prone to deformation and bending when subjected to the same load, and the structure has a negative Poisson's ratio effect when subjected to compression, the metal pipe is shortened in the longitudinal direction and shrinks in the transverse direction when subjected to a compression load, is more prone to densification, and has a better energy-absorbing effect than a conventional metal pipe.

This invention discloses a gimbal vibration damping device based on a high-damping honeycomb core composite structure, relating to the field of unmanned aerial vehicle (UAV) technology. It includes an upper damping plate, a lower damping plate, a honeycomb damping unit, and a damping connection unit. The upper damping plate is used to connect to the UAV body; the lower damping plate is used to mount airborne equipment; the damping connection unit is disposed between the upper and lower damping plates, with both ends connected to the upper and lower damping plates respectively; the honeycomb damping unit is disposed between the upper and lower damping plates, arranged side-by-side with the damping connection unit, and located within the entire... The centroid region of the gimbal vibration damping device based on a high-damping honeycomb core composite structure; the two ends of the honeycomb vibration damping unit are connected to the upper and lower vibration damping plates respectively. The honeycomb vibration damping unit is made of a material used to provide damping loss factor in the low frequency band, and honeycomb cells are densely arranged on the honeycomb vibration damping unit. The honeycomb cells are used for elastic deformation in the high frequency band. The gimbal vibration damping device based on the high-damping honeycomb core composite structure can significantly improve the overall structure's broadband vibration damping effect through a dual-path coupling damping mechanism of honeycomb vibration damping unit and vibration damping connection unit.

The application discloses a three-dimensional curved surface beam plate unit and a mixed point array structure thereof. The unit comprises an outer frame and a BCC framework, the BCC framework is located in the unit and is connected with the outer frame through nodes; the outer frame comprises symmetrically arranged upper curved surface plates and lower curved surface plates, and one recessed curved beam rod is arranged between the four corners of the upper and lower curved surface plates, so that the outer frame forms a concave structure; the BCC framework is composed of eight inclined beam rods, the inner ends of the eight inclined beam rods are connected with each other and located at the center point of the unit, and the outer ends of the eight inclined beam rods are connected with the four corners of the upper and lower curved surface plates respectively. The point array structure is composed of a plurality of periodically arranged units. The application fuses various elements of curved surface, beam and plate and realizes multi-level design to obtain a controllable mixed point array structure with light weight, high strength, high heat dissipation efficiency, impact resistance, vibration reduction and noise reduction.

A side member structure (1) according to the present invention is provided with: an impact-absorbing structure body (20) which is disposed within a side member (10) and which absorbs an impact input to the side member (10) during a side collision of a vehicle, the impact-absorbing structure body (20) having an end section (20a) on the inside of the vehicle in the vehicle width direction connected to a longitudinal surface section (11a) of a side member inner member (11); the impact absorbing structure (20) is provided with a pair of wave-shaped members (21, 23) which are disposed in the vertical direction of the vehicle and which have a wave shape in which convex shapes and concave shapes are alternately continuous in the longitudinal direction of the vehicle, and a concave part (30) which is provided in the vertical surface part (11a) of the side sill inner member (11) and which restricts the end part (20a) on the inside of the vehicle. The impact absorbing structure (20) is provided with: a pair of wave-shaped members (21, 23) which are disposed in the vertical direction of the vehicle; the concave shape (21b) of the upper wave-shaped member (21) and the concave shape (23b) of the lower wave-shaped member (23) are disposed so as to face each other, and the facing concave shapes (21b, 23b) are joined so as to be offset in the longitudinal direction of the vehicle.

A cone (1) for an aircraft turbomachine propeller (15) (20) extending along a longitudinal axis (X) oriented from upstream to downstream, the cone (1) comprising a conical wall (2) made of a rigid material suitable for absorbing the energy of a low impact without plastic deformation and suitable for breaking under a high impact, the cone (2) comprising a protective partition (3) extending transversely with respect to the longitudinal axis (X) and delimiting, with the conical wall (2), a cone volume, the protective partition (3) comprising a peripheral edge fixed to the conical wall (2) at an impact-protected area adjacent to the downstream end of the conical wall (2), the protective partition (3) being made of an elastic material suitable for absorbing the energy of the high impact by elastic deformation. Abstract figure: Figure 1

The force transmission structure comprises a coupling piece, two bodies and two mass blocks, the two mass blocks are respectively protruded on the two bodies, and the coupling piece connects the two bodies.

A method includes: manufacturing an automotive crashworthiness energy absorbing part; and assembling an automotive body by attaching the manufactured automotive crashworthiness energy absorbing part to the automotive body, wherein the manufacturing the automotive crashworthiness energy absorbing part includes: manufacturing a pre-coated part including a tubular member formed using a hat-shaped section member including a top portion and a side wall portion, and a coating part having quality of material with a strength lower than that of the tubular member, the coating part being disposed with a gap of 0.2 mm to 3 mm on an outer surface of a portion including a corner connecting the top portion and the side wall portion in the tubular member to form a coating film; and forming a coating film by forming a coating layer by electrodeposition coating in at least the gap in the pre-coated part, and thermally curing the coating layer.

A force damper arranged to progressively arrest a first force imparted by an object moving in a first direction, the force damper including a housing, a driving member and first and second resilient members. The housing includes a first end and a second end, the first end having a first surface, a second surface opposite the first surface and a first connection point secured to the first surface, and the second end having a through bore and a third surface opposingly disposed relative to the second surface. The driving member includes a first end, a second end and a shaft therebetween, the first end having a stop and the second end having a second connection point. At least one of the first and second resilient members is formed from a material that at least partially undergoes plastic deformation when the first force is arrested. The first and second resilient members are disposed between the stop and the third surface and impart a second force on the stop toward the second surface.

The application belongs to the technical field of engineering structure mechanics, and discloses a micro-curved shell-plate hybrid superstructure and a dot array superstructure. The superstructure comprises simple cubic cells and face-centered cubic cells, wherein the simple cubic cells and the face-centered cubic cells are hybrid, and the components of the face-centered cubic cells are connected by micro-curved shells to form face-centered cubic micro-curved shell cells. The micro-curved shell components are used to replace part of the plate components in the plate dot array supermaterial to form a micro-curved shell-plate hybrid dot array superstructure, wherein the tensile and compressive deformation and the bending deformation of the plate components are not coupled, the tensile and compressive deformation and the bending deformation of the micro-curved shell components are coupled, the introduction of the micro-curved shell can introduce small-scale bending deformation, improve the deformation stability and energy absorption characteristics of the structure, and realize the change from the tensile and compressive deformation control of the traditional plate dot array supermaterial to the tensile (compressive) and bending coupled control of the micro-curved shell-plate hybrid dot array superstructure.

To suppress a phenomenon that the deterioration of a damper is early progressed at a peripheral portion of an insertion port of an insertion hole of an attachment base part, in a "damper attachment structure of a seismic isolator".SOLUTION: In a damper attachment structure 10, a damper 1 is fixed to an attachment base part 2 by a plurality of axial fixing tools 23 which penetrate the attachment base part 2 and a center axis of the damper 1. In the damper 1, with respect to an effective cross section area S of a cross section in a diameter direction of a portion which is penetrated with the axial fixing tools 23, an effective cross section area S1 of a cross section in the diameter direction located in a position which is close to an insertion port 212 of a damper insertion hole 211 is equal to or larger than an effective cross section area S2 of a cross section in the diameter direction located in a position which is far from the insertion port 212, and the effective cross section area S1 of a cross section in the direction which is the nearest from the insertion port 212 is larger than an effective cross section area S3 of a cross section in the diameter direction which is the farthest from the insertion port 212.SELECTED DRAWING: Figure 4

We provide a honeycomb component made of a fiber-reinforced composite material that achieves both lightweight properties and shock absorption characteristics. [Solution] A honeycomb member having a structure consisting of an aggregate of hollow columnar cells partitioned by cell walls, wherein the cell walls are composed of a porous fiber-reinforced composite material containing a discontinuous fiber base material (Ds) made of fibers (Cf), resin (Cr), and voids, and the density ρm of the cell walls is 0.1 to 0.8 g / cm³. 3 The honeycomb member is as follows: the ratio L / t of the circumference L of the columnar cells to the thickness t of the cell walls of the honeycomb member is 30 or more and 200 or less, and the thickness t of the cell walls is 200 μm or more and 1000 μm or less.

A step is formed to partition an impact absorbing protrusion into at least two sub-protrusions, and when an impact is applied, some of the sub-protrusions and the step are destroyed sequentially in order from the most vulnerable to the impact, and thus the impact can be absorbed over a wide impact absorbing range. In particular, as the sub-protrusions and the step are manufactured with different thicknesses and lengths, a damage order of the sub-protrusions and the step is predetermined in a manufacturing process, the sub-protrusions and the step are destroyed in the predetermined order, and thus an impact absorbing effect can be stably obtained.

This invention relates to metamaterials for vibration damping and load-bearing applications and methods for their preparation, wherein the essence of metamaterial design lies in creating materials through artificially manufactured structural units with specific properties and functions.

The energy absorbing member (10, 10A) comprises a member body (11) and an inward-facing flange (12). The member body (11) includes a first plate portion (111), a second plate portion (112), and a first ridge portion (114). The first ridge portion (114) connects the first plate portion (111) and the second plate portion (112). The inward-facing flange (12) is provided on the edge of the member body (11) in the direction of extension of the first ridge portion (114). The inward-facing flange (12) is continuous with at least the first ridge portion (114). The inward-facing flange (12) protrudes inward from the member body (11) when viewed along the extension direction. When Lp is the protruding length of the inward-facing flange (12) at the plate portion (111,112) and Lr is the protruding length of the inward-facing flange (12) at the first ridge portion (114), the following conditions are met: Lp ≥ 0 mm, Lr > 0 mm, and Lr ≥ Lp.

This document discloses an automotive seat and its base. The base includes a top tether and energy-absorbing elongated fingers. The tether includes webbing. The webbing is at least partially wrapped around the elongated fingers. The elongated fingers are configured to deform when a load applied thereto by the webbing exceeds a predetermined threshold, so as to release the webbing from the base.

The application discloses a kind of multistage energy-absorbing structures of foamed aluminum alloy, it is related to foamed aluminum alloy technical field, including plate and pedestal, the top of the plate is opened with trapezoidal groove, the trapezoidal groove is trapezoidal structure;The bottom of the plate is fixedly connected bottom trapezoidal block, the bottom trapezoidal block is consistent with trapezoidal groove, one side of the plate is fixedly connected with side trapezoidal block.The multistage energy-absorbing structures of foamed aluminum alloy, through the self characteristic of foamed aluminum alloy base material, combine energy-absorbing layer, energy-absorbing frame, first spring, second spring, energy-absorbing cotton and other groups of energy-absorbing components, five progressive energy-absorbing systems are formed, from the lateral side groove rubber pad buffer, to the preliminary energy absorption of energy-absorbing layer, to the step-by-step buffer energy absorption of energy-absorbing frame, second spring, first spring, finally through energy-absorbing cotton absorption vibration energy, the layered absorption, gradual buffer of collision energy is realized, effectively solve the problem of low energy-absorbing efficiency, insufficient impact resistance of traditional energy-absorbing structure.

Vehicle barrier (1) to block an access road comprising: - a support structure (3) for absorbing collision energy (F) from a vehicle; - an interior space (6) at least partially enclosed by the supporting structure (3); - several downward-extending feet (4) arranged on the support structure (3), each with a foot end (5) facing away from the support structure (3); - several downwardly extending claw elements (7) arranged on the support structure (3) with at least one claw tip (8) facing away from the support structure (3) for anchoring the support structure (3) in a substrate, wherein the claw tips (8) span a plane (E); - each has a predetermined breaking point (90) formed at the feet (4), wherein the predetermined breaking point (90) can be released when a threshold value of the collision energy (F) is exceeded, wherein i. in a rest state, with the predetermined breaking point (90) unresolved, all foot ends (5) are arranged below the plane (E), and wherein ii. in a collision state, with the predetermined breaking point (90) released, at least one foot end (5) is arranged above the plane (E).