7results about How to "Avoid fatigue failure" patented technology

The invention relates to a wing connection device for connecting an outer wing to a central wing and comprising a triple joint comprising a first joint, a second joint and a third joint, wherein the first joint is fixed to a central wing rear spar of the central wing, the second joint is fixed to an outer wing rear spar of the outer wing and the third joint is fixed to a docking rib web of the outer wing, and a rear strut plate fixed to a rear spar frame of the central wing. In this way, by fixing the rear strut plate to the rear spar frame of the central wing, the load from the outer wing can be spread, so that the stress level is reduced, the structural efficiency is improved and the deformation of the connection structure is reduced. For example, the rear strut plate spreads the upward load and spreads the load to the fuselage frame and via the fuselage frame to the fuselage. The invention also relates to an aircraft comprising such a wing connection device and to a method of connecting wings.

A manifold is provided, which is connected to an electrode tab disposed at one of two ends of an electrode assembly in the axial direction, wherein the end is inserted into the can when facing the bottom of the can. The manifold includes: a terminal engagement portion having a side surface that engages with a cap, the bottom of the can, or an electrode terminal; an electrode engagement portion surrounding the terminal engagement portion in the radial direction and having another side that connects to the electrode tab of the electrode assembly; a resilient connection portion disposed between the electrode engagement portion and the terminal engagement portion, and electrically connecting the electrode engagement portion and the terminal engagement portion; and an opening disposed between adjacent resilient connection portions in the circumferential direction, and separating the electrode engagement portion and the terminal engagement portion in the radial or axial direction.

The present application relates to the technical field of oil casing, in particular to a titanium alloy threaded connection structure, comprising a pipe body and a coupling, the outer surface of the end of the pipe body is a male end, the male end has a male end thread and a male end sealing cylindrical surface, the inner surface of the coupling is a female end, the female end has a female end thread and a female end sealing cylindrical surface, the male end and the female end are connected through thread engagement, the stress uniformity, sealing performance and anti-sticking ability of the connection structure are improved through dynamic adjustment and optimization of each parameter of the thread, and safe connection and effective sealing of titanium alloy oil casing and oil pipes in extreme service environments are realized.

This invention discloses a heat dissipation control method and device based on the synergistic coupling of piezoelectric jet and thermoelectric cooling. The heat dissipation control method includes: controlling a piezoelectric ceramic driving plate to drive an intake flexible valve plate to generate periodic bending deformation, thereby changing the volume of the compression chamber, so that the compression chamber alternately performs the intake process and the compression process; during the compression process, when the pressure difference between the compression chamber and the external environment pressure reaches the opening threshold determined by the pre-tightening force and effective pressure area of ​​the outlet flexible valve plate, the outlet flexible valve plate passively generates an opening deformation, so that the cooling fluid in the compression chamber is injected into the air inlet of the heat exchange module in the form of a jet through the air outlet; the heat from the heat source is absorbed by the cold end of the thermoelectric cooling module, and the heat is transferred to the hot end of the thermoelectric cooling module, and then transferred to the heat exchange module, and carried away by the cooling fluid injected from the air inlet of the heat exchange module, fundamentally avoiding the risk of fatigue failure of traditional mechanical valve plates.

The utility model discloses a sheet metal positioning cylinder. The sheet metal positioning cylinder comprises a cylinder body, a first mechanism, a second mechanism and a compression spring. The first mechanism comprises a taper pin pull head, a piston rod and a piston. The second mechanism comprises an inner taper face spring piece and a guide sleeve. The compression spring abuts against the lower end face of the guide sleeve. The taper pin pull head extends upward with the movement of the piston rod to be inserted into the positioning hole of the sheet metal. With the retraction of the piston rod, the inner taper face spring piece is pushed to expand radially and move downward. The inner taper face spring piece extends with the taper pin pull head to be inserted into the positioning hole of the sheet metal. With the retraction of the taper pin pull head, the inner taper face spring piece expands radially to grab the sheet metal and move downward to tighten the sheet metal for positioning. The utility model has the advantages of being suitable for smaller-diameter positioning holes, reducing production cost, eliminating mechanical interference and enhancing positioning stability.

This invention relates to the field of vibration isolator technology and discloses a hybrid vibration isolator and method for dual vibration control of electrical equipment. The base contains a bottom buffer assembly, and a buffer support assembly sits atop the bottom buffer assembly. The bottom buffer assembly provides vertical vibration isolation for the buffer support assembly. The buffer support assembly includes a cross-shaped base for mounting an electromagnet and a side buffer connection assembly connected to the side of the cross-shaped base. The side of the cross-shaped base slides against the inner wall of the base. A swing buffer assembly sits atop the cross-shaped base. This invention utilizes the coordinated operation of the bottom buffer assembly, buffer support assembly, and swing buffer assembly, combining mechanical buffering and electromagnetic control to achieve omnidirectional vibration control in the vertical, horizontal, and swing directions, overcoming the shortcomings of traditional single-direction vibration isolation devices. The composite structure combining multi-point support, oblique buffering, and vertical support ensures the stability of the mounting base and evenly distributes the load to prevent equipment tilting.

This application relates to the field of vehicle cargo securing technology, and in particular to an embedded cargo securing device for a vehicle compartment. The device includes an embedded base fitted into the side wall of the vehicle compartment. The base has a dovetail-shaped guide groove. A sliding block slides along the groove and is connected to a telescopic adjusting rod. The adjusting rod is connected to a flexible strap via a universal joint. A quick-release buckle is provided at the end of the strap. This device is embedded and integrated, does not occupy cargo space, uses magnetic positioning for the sliding block, and features multi-point cross-wrapping of the strap, making it adaptable to irregular or soft cargo and achieving rapid locking and reliable restraint.