8results about How to "Delayed buckling" patented technology

The invention discloses an anti-impact quartz flexible accelerometer swing beam and a design method, relates to the technical field of accelerometer structure design, and solves the problem that the swing beam is easy to break when the existing swing assembly is sensitive to strong impact and high vibration in the directions of a swing shaft and an output shaft. The invention provides a shock-resistant quartz flexible accelerometer pendulum beam which is assembled in a pendulum assembly of a quartz flexible accelerometer comprising a quartz pendulum piece and a coil assembly, the quartz pendulum piece comprises a pendulum beam, a pendulum tongue and a pendulum piece outer ring, and the coil assembly comprises a coil framework and a coil winding. The swing beam comprises a reinforcing boss arranged on the surface of the swing beam.

The invention discloses a steel structure module building self-resetting detachable maintenance structure and a construction method. The steel structure module building self-resetting detachable maintenance structure comprises square steel tube beams and square steel tube columns, and the square steel tube beams and the square steel tube columns are welded and fixed to form a steel framework; the corrugated steel plate wall is connected with the steel framework and is connected with the square steel pipe beam or the square steel pipe column on the corresponding side through a detachable connecting assembly; the structure further comprises self-resetting energy dissipation supporting assemblies arranged on the two opposite side faces of the steel framework, and the self-resetting energy dissipation supporting assemblies are provided with inhaul cables made of shape memory alloy. According to the structure, the supporting pieces of the corrugated steel plate walls and the supporting pieces of the square steel pipe columns / square steel pipe beams on the corresponding sides are connected in an assembly mounting mode to form detachable connecting assemblies, the detachable maintenance function of the steel structure module building is conveniently achieved, and the energy dissipation and self-reset functions are achieved through the self-reset energy dissipation supporting assemblies.

The utility model discloses a kind of composite material compression test fixtures of synchronous pressure application, including chassis and clamping block;Chassis includes bottom plate that can be installed on test table and the back plate and two side plates connected with bottom plate;Two pairs of clamping block are symmetrically arranged, and each pair of clamping block is symmetrically arranged;The upper and lower clamping block of one side is slidably installed on the same movable plate by first vertical guide structure, movable plate side portion is slidably installed on back plate by horizontal guide structure, movable plate is installed with clamping power component in the side away from clamping block, clamping power component is towards one side side plate, clamping power component is used to resist on side plate and promote the clamping of clamping block in the side;The upper and lower clamping block of the other side is slidably installed on the same fixed plate by second vertical guide structure, and fixed plate is installed on the other side plate;Clamping block is close to the end of effective test area and is equipped with extension and arc chamfer.This fixture can slow down the stress concentration of clamping block end in sample effective test area, and left and right clamping block load distribution is uniform.

The invention discloses a coiled tubing reaction torque reduction tool, system and method. The tool comprises a shell, an underground hydraulic control circuit, a hydraulic assembly, a clutch plate set, a clutch plate sleeve and a continuous oil pipe connector. The underground hydraulic control circuit is used for receiving a first electric signal instruction and controlling the hydraulic assembly to push and press the clutch disc set so that quantitative friction torque can be generated between clutch discs and transmitted to the continuous oil pipe connector. Or a second electric signal instruction is received, and the hydraulic assembly is controlled to release the clutch disc set so that the clutch discs can be in the loose state. The system comprises a coiled tubing reaction torque reduction tool, an upper computer, a coiled tubing and a drill bit. The upper computer is used for sending an electric signal instruction to the underground hydraulic control circuit and controlling whether reaction torque generated by the drill bit is transmitted to the coiled tubing or not. According to the tool, system and method, the damage probability of the coiled tubing can be greatly reduced, and the service life of the coiled tubing is prolonged.

The utility model discloses a steel pipe-concrete outer package combined column foot with T-shaped stiffening rib, including steel pipe column, the steel pipe column outside is equipped with the steel reinforcement cage of adaptation, and the steel pipe column is filled with concrete between steel reinforcement cage, the steel pipe column circumference side wall is circularly distributed with a plurality of stiffening parts for improving the contact area with concrete, and the length of stiffening part is adapted with the length of steel pipe column, and the overlap steel bar is equipped between stiffening part and steel reinforcement cage. The utility model is used to improve the combination area of steel pipe column and concrete, to improve the bearing capacity of steel pipe column combined column foot, to satisfy the demand of larger tonnage building.

The utility model relates to the technical field of mechanical equipment, and particularly discloses a metal thin-wall part cloth tape winding die. The device comprises a winding core shaft and a supporting die arranged on the periphery of the winding core shaft in a sleeving mode, the supporting die is sleeved with the metal thin-wall part, the supporting die and the winding core shaft are coaxially arranged, a plurality of ejection mechanisms are arranged on the supporting die, and the ejection mechanisms are evenly arranged on the supporting die at intervals in the circumferential direction of the winding core shaft. The ejection mechanism comprises a fixing seat, an ejection block and a reverse ejection bolt, the fixing seat is connected with the supporting mold, a mounting groove matched with the ejection block is formed in the fixing seat, and the reverse ejection bolt penetrates through the side, close to the winding mandrel, of the fixing seat and is in threaded connection with the side, close to the winding mandrel, of the ejection block; the distance between the side, away from the winding mandrel, of the ejector block and the metal thin-wall part is adjusted. The inner wall of the metal thin-wall part is comprehensively supported by the multiple ejector blocks, and deformation and buckling of the metal thin-wall part in the cloth tape winding, curing and turning processes are reduced through contact force provided by the ejector blocks.

A window, a display device including the window, and an electronic device including the display device are disclosed. The window includes: a glass substrate; a folding region including: a first-1 portion foldable relative to a folding axis extending in a first direction and having a uniform thickness; and a non-folding region defined to be adjacent to (or adjacent to) the folding region in a second direction perpendicular to the first direction in the unfolded state of the window, and including: a second-1 portion having a thickness that increases with increasing distance from the first-1 portion.