5results about How to "Improve local stiffness" patented technology

The utility model discloses a kind of sealing plate and battery for battery shell sealing, at least one exhaust hole is equipped on the sealing plate, and protruding reinforcing rib is arranged in the surrounding area of the exhaust hole;The protruding direction of the reinforcing rib is towards battery interior, to form the gas permeation gap for the ventilation of battery inner cavity and the exhaust hole between the sealing plate and tab.This utility model sets reinforcing rib in the surrounding area of exhaust hole on sealing plate, so that tab can only form local attachment with the surface of sealing plate after bending, not complete attachment exhaust hole area, to form gas permeation gap between tab and reinforcing rib.Because when the gas pressure in battery is increased, gas diffuses to exhaust hole through gas permeation gap, avoid gas discharge obstruction, improve the safety performance of battery.In addition, the setting of reinforcing rib can also improve the local rigidity of sealing plate, prevent mechanical deformation.

The utility model belongs to the technical field of carriages, and discloses a carriage wallboard and floor connecting structure which comprises a floor, a wallboard, a sleeve assembly, a corner connector and a connecting assembly, a first fixing piece is fixedly connected to a floor body, and a second fixing piece is fixedly connected to a wallboard body. The lap joint face of the second fixing piece is fixedly connected with the contact face of the first fixing piece through filling glue, the sealing performance between the floor and the wall plate is improved, loosening, abnormal sound and cracking caused by vibration of a carriage are restrained, and the first sleeve and the second sleeve are fixedly embedded in a first connecting hole of the floor body and a first fixing hole of the second fixing piece correspondingly. The corner connector is arranged between the floor body and the second fixing piece, the first connecting piece penetrates through a first through hole of the corner connector and is fixedly connected to the first sleeve through thread glue, the second connecting piece penetrates through a second through hole of the corner connector and is fixedly connected to the second sleeve through thread glue, looseness after threaded connection is prevented, water vapor is prevented from permeating through the sleeves, and electrochemical corrosion is reduced.

This invention discloses an additive manufacturing-based inertial amplification nonlinear low-frequency vibration isolation metamaterial structure, vibration isolation device, and its performance control method. The vibration isolation metamaterial structure includes a rhombic frame structure, an inertial amplification unit, and a square spring structure. The square spring structure is arranged within the rhombic frame structure, with its two ends connected to a pair of opposite corners of the rhombic frame structure. The elastic extension direction of the square spring structure is parallel to the diagonal of this pair of opposite corners of the rhombic frame structure. The inertial amplification unit has a centrally symmetrical structure, including a rigid rod, two counterweights, and two diagonal rods. The center of symmetry of the inertial amplification unit, the center of the rhombic frame structure, and the center of the square spring structure all coincide in projection. Therefore, the vibration isolation metamaterial structure of this invention significantly widens the bandgap range and enhances low-frequency vibration isolation performance, exhibiting excellent performance in suppressing longitudinal waves in the 0-1000Hz low-frequency range, increasing vibration damping, and energy absorption.

This invention discloses a flexible assembly fixture and method for aircraft winglets, comprising: a robot and an end effector, a fixture frame, positioning pins, positioning-clamping components, an interface plate, and a storage rack for the positioning-clamping components. The robot is used for automatic reconfiguration of the fixture; the robot's end effector is used for installing and removing the positioning-clamping components; the fixture frame is welded from columns and beams, with threaded holes distributed on each column and beam for mounting components; the positioning pins are installed on the fixture frame through the threaded holes; the positioning-clamping components are installed on the fixture frame through the interface plate to position and clamp the winglets; the interface plate is installed on the main fixture frame through the threaded holes; unused positioning-clamping components can be placed in its storage rack. This invention has the advantages of intelligent reconfigurability, high automation, adaptive support, and stable clamping, and is suitable for the assembly needs of various winglet specifications.

The application relates to the field of bridge engineering and provides a layout method and a construction method of a shear connector of a fabricated steel-concrete composite girder bridge, which are based on machine-bridge coupling vibration response, a finite element model of a steel-concrete composite taxiway bridge is established, the influence of bolt cluster degree and unevenness parameters on the dynamic performance of the fabricated steel-concrete composite girder bridge is deeply studied, the layout mode of the shear connector is optimized, the vibration response under the machine-bridge coupling effect is effectively reduced, and the performance of the bridge structure under the action of the airplane dynamic load and the operation quality of the airplane are improved. Compared with the prior art, the application can significantly reduce the vibration response of the bridge under the airplane dynamic load, prolong the service life of the bridge, and improve the comfort of airplane operation. The technical scheme of the application provides a new theoretical basis and practical guidance for the design and construction of the steel-concrete composite girder bridge, and has important engineering application value and market promotion prospect.