54 results about "Torsional deformation" patented technology

This invention discloses an early warning method applicable to large drum shaft systems. It includes arranging high-precision measuring sensitive units on the shaft system to collect physical information about the torsional deformation and torque experienced during drum shaft rotation. This physical information is transmitted as an electrical signal to a signal conversion and transmission unit, which converts the electrical signal into a digital signal. This digital signal is then transmitted to a digital signal receiver via an induction coil. The digital signal receiver not only receives the digital signal but also engages in induced energy coupling with the induction coil. Electrical energy can be transmitted through the digital signal receiver and received by the induction coil, thereby powering the high-precision measuring sensitive units and ensuring their normal operation. The digital signal receiver transmits the digital signal to a signal processing unit, which processes it into an analog current signal and sends it to an early warning unit. The early warning unit determines whether an alarm is triggered and issues an early warning. Beneficial effects: High monitoring accuracy, wide coverage, and improved safety and reliability.

The utility model provides a bifurcated valve driving module with a flexible connecting pipe, which is characterized in that a rotatable part is arranged at the front end of a bifurcated valve, a valve joint is arranged at the rear end of the bifurcated valve, and a first bifurcated pipe is arranged in the middle of the bifurcated valve; the bifurcated valve is a Y valve or a T valve, and a rotatable part at the front end of the bifurcated valve is connected with the flexible connecting pipe; the port control mechanism can support and fix the bifurcation valve, the port driving mechanism is used for driving the valve connector to open or close the channel so as to prevent blood or contrast media from seeping out or clamp a guide wire or a catheter in a port, and the port rotating mechanism is used for driving a rotatable part at the front end of the bifurcation valve to rotate so as to drive the valve connector to rotate. According to the utility model, the port control mechanism controls the rotatable part at the front end of the bifurcated valve to synchronously rotate along with the rotation of the rotary delivery mechanism, and if the two rotary motions are not completely synchronous, the flexible connecting pipe can generate torsional deformation, so that the force sensing of a force sensing element in the rotary delivery mechanism on the torsional force cannot be influenced.

This invention relates to the field of adhesive coating technology and discloses an adhesive coating device for an induction cooker panel, including a base, a linear guide rail on the base, a spray gun fixedly mounted on the linear guide rail, the spray gun including an adhesive supply pipe and a movable nozzle, a back suction valve on the adhesive supply pipe, a fixed pipe connecting the adhesive supply pipe and the movable nozzle, the fixed pipe being fixedly connected to the linear guide rail, a limit cylinder coaxially fixedly mounted on the fixed pipe, the movable nozzle coaxially mounted inside the limit cylinder and connected to the fixed pipe through a cylindrical elastic membrane, a magnet fixedly mounted on the movable nozzle, and a winding coaxially mounted on the limit cylinder; this application achieves rapid stretching and breaking of the adhesive by driving the movable nozzle to rotate circumferentially and causing the elastic membrane to undergo helical torsional deformation, forming an axial tensile force that drives the movable nozzle to move axially, thereby achieving rapid stretching of the adhesive and breaking it. At the same time, combined with the back suction effect of the back suction valve and the pressure-holding design of the elastic membrane, it effectively solves the problem of easy stringing of the adhesive at the end of the coating process.

This invention relates to an integrated variable camber wing based on a piezoelectric-driven torsional cubic superstructure, comprising a wing skeleton and a skin. The wing skeleton includes multiple torsional cubic superstructures arrayed along the wing chord direction. Each torsional cubic superstructure is a cube formed by an array of multiple unit-cell torsional superstructures. Adjacent unit-cell torsional superstructures in the wing length and thickness directions share a straight rod, while adjacent unit-cell torsional superstructures in the wing width direction share four Z-shaped piezoelectric rods. Each unit-cell torsional superstructure is a cube formed by an array of four cell units, with adjacent cell units sharing a straight rod. Each cell unit includes Z-shaped piezoelectric rods and straight rods. Two Z-shaped piezoelectric rods are connected to the two ends of two straight rods. Each Z-shaped piezoelectric rod at both ends of the torsional cubic superstructure is connected to the skin. When all the Z-shaped piezoelectric rods of the unit-cell torsional superstructure undergo compressive deformation in the height direction, the unit-cell torsional superstructure undergoes torsional deformation, thus causing the torsional cubic superstructure to undergo torsional deformation. By converting the compressive deformation of the cellular unit into the torsional deformation of the compressive-torsional cubic superstructure, the wing camber is changed, and the drive components are eliminated, thus realizing the lightweight design of the morphing wing.

The application discloses a kind of torsion wing structure and aircraft, it is related to the field of morphing wing technology, including linear drive device, wing rib and pressure-torsion coupling cell, wing rib and pressure-torsion coupling cell are multiple, multiple wing ribs are arranged along the wing span direction interval, and pressure-torsion coupling cell is equipped between two adjacent wing ribs;Pressure-torsion coupling cell includes intermediate connecting component and the load-bearing end block fixedly connected with the two ends of intermediate connecting component, load-bearing end block is fixedly connected with adjacent wing rib, and all wing ribs and pressure-torsion coupling cell form wing main body;The first end wing rib of wing main body is used to be fixedly connected with fuselage;Two load-bearing end blocks of pressure-torsion coupling cell are connected with linear drive device;Linear drive device can make the two load-bearing end blocks of each pressure-torsion coupling cell approach each other or away from each other, to make intermediate connecting component torsion deformation and drive wing rib around wing span torsion by load-bearing end block.The application has the effect of "lightweight-structure simplification-aerodynamic efficiency-high life-low maintenance cost".

The present application belongs to the field of light metal plastic forming, and particularly relates to a device and method for preparing fine-grained magnesium alloy rod by asymmetric multi-directional shear extrusion. The wedge block combination in the present application can combine multi-directional shear extrusion deformation and differential speed torsional deformation, effectively weaken the magnesium alloy basal plane texture, and improve the mechanical properties of the magnesium alloy. While the magnesium alloy material is subjected to torsional extrusion in the torsional extrusion deformation zone, the sectional area of the channel gradually decreases, and the angle of the channel deflection is different, so that the frictional force of the magnesium alloy material on the surface of the convex and concave dies at the contact position is different, and the degree of torsional deformation is also different, so that the material realizes differential speed torsional deformation, and the grain refinement effect of the magnesium alloy rod is more remarkable. When the magnesium alloy material passes through the large and small concave dies, the deformation degrees of the magnesium alloy material are different due to the particularity of the structure, so that the grain refinement is effectively realized. At the same time, the flowability of the magnesium alloy material is also different, causing differential speed flow to deflect the c-axis, thereby weakening the texture.

The application discloses a balance car and a support framework thereof, wherein the support framework is provided with a strain sensor, the strain sensor comprises a first mounting portion and a second mounting portion which are respectively arranged at left and right sides of the support framework, a first horizontal strip for detecting deformation of the support framework is arranged between the first mounting portion and the second mounting portion, and the first horizontal strip is provided with a first strain gauge capable of sensing deformation of the first horizontal strip. Through the arrangement of the first mounting portion and the second mounting portion in the inductive sensor, a force arm with a certain length is formed, the torsional deformation on the support framework is enlarged, the data signal measured by the first strain gauge is increased, the first strain gauge is more likely to detect the torsion of the support framework more accurately, the turning control is more sensitive, and the turning experience of the balance car is good.

This utility model relates to an automatic quick-clamping fixture for aircraft seat slide rails, belonging to the field of aircraft parts processing technology. It includes a push cylinder with a clamping slider at its output end for holding the part. The push cylinder is fixed to a base, and a rotary clamping cylinder is rotatably mounted on the base. When the rotary clamping cylinder rotates 90 degrees, it acts on the top of the part. This application significantly reduces the torsional deformation of long, straight, thin-walled aluminum alloy parts caused by clamping force through staged clamping and multiple limiting designs. Simultaneously, in this application, the rotary clamping cylinder is moved away before processing to avoid interfering with the tool path, ensuring the stability of the machining contour and reducing the impact of vibration on surface quality and tool life.

The present application relates to gear machining technical field, especially a kind of variable tooth thickness modification machining method for double lead worm gear and worm, including the wave form distortion rate of idle cutting force of hobbing cutter and torsional stiffness coefficient;Real-time monitoring cutting force wave form distortion rate and tool torsional deformation, calculate disturbance intensity index to divide disturbance level and set detection opportunity;Through the tooth thickness curve of actual measurement, tooth thickness change rate coefficient is obtained to judge machining quality;The tooth thickness deviation curve of unqualified tooth groove is analyzed to determine the dominant interference type, and the spindle speed or tool pose is regulated based on disturbance level;The control effect is verified by attenuation coefficient;When not up to standard, attenuation difference is used to optimize control coefficient;Finally, the overall quality of worm is evaluated by the consistency coefficient of tooth thickness change rate of each tooth groove of full tooth surface.The present application solves the problem that the full tooth surface consistency of formed worm is low due to the resonance and deformation disturbance of asymmetric characteristics of hobbing cutter in variable tooth thickness worm machining.

The utility model discloses an electric ship, including ship body structure, deck structure, ship bottom support structure, power system and advancing system. The utility model connects bridge through rigid connection piece body and two groups of lower piece, and the ship body torsional rigidity and transverse stability are improved obviously, form the low resistance navigation characteristic of catamaran's particularity, and the space utilization rate is optimized through the functional division of the layered arrangement upper deck and lower deck, and the grid skeleton of the ship bottom support structure is embedded, and the lower piece structure strength is strengthened, and the integrated ballast water tank function enhances the ship counterweight adjusting capacity, and the power system passes through the modularization battery pack, and the battery thermal runaway risk is reduced while ensuring the energy supply stability, and the advancing system adopts the combination scheme of sectional flange connection structure and watertight packaging subassembly, guarantees the transmission stability of drive shaft when the ship body deformation, avoids the water seepage into the transmission mechanism, satisfies the torsional deformation and the propulsion efficiency such as ship operation core demand.

This application relates to the field of vehicle chassis and provides a suspension structure and a vehicle. The suspension structure of this application includes an outer tube, an inner core disposed within the outer tube, and an elastic body disposed between the outer tube and the inner core. The elastic body has a first portion wrapped around the inner core and a second portion connected to the first portion. The second portion is disposed at the end of the inner core connected to the powertrain bracket, and when the inner core is connected to the powertrain bracket, the second portion can abut against the powertrain bracket. The suspension structure of this application can increase the friction between the elastic body and the powertrain bracket, and also increase the friction between the powertrain bracket and the inner core during the connection process, preventing the inner core from shifting. This effectively avoids torsional deformation of the elastic body, thereby improving the reliability of the elastic body and the overall suspension structure.

The utility model discloses a kind of mechanical residual stress relieving devices, including drive pedestal, mobile frame and bracket guide rail are provided on drive pedestal, mobile frame can be driven to move reciprocatingly transversely under the drive of drive pedestal, adjustable limit block is provided on bracket guide rail, adjustable limit block can reciprocate along bracket guide rail vertically, mobile frame is provided with gyro wheel group and drive assembly, gyro wheel group is rotated and height is adjusted by drive assembly drive.This mechanical residual stress relieving device provided by the utility model forms the space required by the cross-sectional dimension requirement of corresponding board through gyro wheel group and adjustable limit block, makes board mechanical setting under the synergic driving of first gyro wheel and second gyro wheel, stress distribution is uniform, realize the stress balance of overall structure, solve the problem that board cannot satisfy flatness and other size requirements in prior art due to internal residual stress unilateral warping and torsional deformation, overall structure is simple, design is ingenious, with greater popularization and application value.

We provide vehicles that can further improve driver comfort. [Solution] The rigidity balance of the vehicle front to rear is adjusted such that the nodal point An of the torsional deformation that occurs when the vehicle 10 is turned is located within the longitudinal range of the driver's seat 22. The vehicle 10 further has a battery 20 located under the floor of the vehicle 10, and a plurality of side fastening points 40a are provided at both ends of the battery 20 in the vehicle width direction for fastening the battery 20 to the frame of the vehicle 10, and the density of the side fastening points 40a behind the longitudinal center C of the battery 20 is higher than the density of the side fastening points 40a in front of the longitudinal center of the battery 20.

The utility model discloses a bridge is with anti -crack structure, include: reinforcing plate and set up the anchor tendon subassembly on reinforcing plate, reinforcing plate is connected with the reinforcing bar on box girder through anchor tendon subassembly, at least one anti - torsion convex is formed on reinforcing plate, anti - torsion convex is parallel with the joint of two box girders. Set up anti - torsion convex can effectively increase the anti - deformation ability of joint place, thereby avoid the transverse torsional deformation of box girder because of the unbalance of bridge surface load, and then avoid the situation that the crack appears at joint place.

This invention relates to the field of drilling rig attitude measurement technology, and discloses a device and method for accurately measuring drilling rig attitude. The device for accurately measuring drilling rig attitude includes: calculating initial pitch and initial roll angles; calculating dynamic pitch and dynamic roll angles; calculating the fused azimuth angle; calculating pitch compensation and roll compensation angles; calculating corrected pitch and corrected roll angles; calculating borehole axis tilt and borehole axis azimuth angle; and calculating the direction vector. This invention achieves adaptive fusion of rigid body attitude and dynamic gravity direction by integrating multi-source data such as mast tilt angle, vehicle body tilt angle, triaxial acceleration, triaxial angular velocity, triaxial magnetic field, feed force, and torque. By establishing a structural mechanics model to calculate the bending and torsional deformation of the drill tip, it achieves quantitative compensation for structural elastic deformation, thereby improving the attitude measurement accuracy under near-vertical drilling conditions in alternating soft and hard strata, reducing construction rework, and lowering project costs.

A buckle assembly (10) comprises a force-limiting module (20). The force-limiting module (20) comprises: a mandrel (21), which has a hollow structure and is rotatably supported at two axial ends; a torsion bar (22), which is positioned in a hollow inner cavity of the mandrel so as to be arranged coaxially with the mandrel, wherein only part of the torsion bar is connected to the mandrel in a co-rotatable manner; and a winding member (23) having one end connected to a buckle and the other end connected to the mandrel, wherein when a force applied to the buckle is greater than a force threshold defined by the force-limiting module, the torsion bar rotates together with the mandrel at only said part thereof to undergo torsional deformation, while the part of the winding member wound around the mandrel moves away from the outer peripheral surface of the mandrel as the mandrel rotates, so as to gradually unwind. The mandrel comprises a first end (2111) and a second end (2121) which are opposite in an axial direction, wherein the first end is torsionally connected to part of the torsion bar and is supported in an opening (2411) on a first side (24A) of a housing (24). A friction-reducing structure is disposed between the housing and at least one of the first end and the second end. By means of the provision of the friction-reducing structure, the buckle assembly has relatively high strength and relatively low wear.

This invention provides a test device and method for the overall torsional stiffness of tunnel segments and strata considering the grout solidification process. The test device includes a grout loading system, an overall torsional stiffness testing device for tunnel segments and strata, a torque loading system, and a grouting device. The overall torsional stiffness testing device is connected to both the torque loading system and the grouting device, and the grouting device is connected to the grout loading system. The test device includes a model box, tunnel segments, partitions, multiple displacement sensors, and a data acquisition instrument. The tunnel segments and partitions are installed inside the model box. The partitions are installed between the inner wall of the model box and the tunnel segments. The space between the outer surface of the partitions and the inner wall of the model box is a sand zone, and the space between the inner surface of the partitions and the outer surface of the tunnel segments is a grout zone. The beneficial effect of this invention is that the overall torsional stiffness testing device for tunnel segments simulates torsional deformation of the test segments through the torque loading system.

The application belongs to the technical field of cables, and particularly relates to a high-torsion-resistance and low-smoke PVC / TPU composite cable material and a preparation method thereof. The PVC and polyether TPU are used as main components of the cable material, the compatibility of the PVC and the polyether TPU is improved by adding a compatibilization aid, the mechanical strength of the cable material caused by phase separation is inhibited, the aluminum phosphate is uniformly loaded on the surface of nano silicon dioxide, the flame-retardant and smoke-suppressing agent is formed by polymerization of hexachlorocyclotriphosphazene and cyanuric acid to improve the flame-retardant performance of the cable material, the toughening filler is prepared by mixing fumed silica, cerium oxide and modified montmorillonite, the nano sheet structure can effectively block the penetration of water molecules to improve the water resistance of the cable material, and when the cable material is subjected to torsion deformation to generate microcracks, the toughening filler can prevent the rapid expansion of the cracks to improve the torsion resistance of the cable material. The composite cable material prepared by the application has excellent low-temperature resistance and water resistance, and can realize low-temperature torsion without damage.

This utility model relates to the field of elevator shaft seismic isolation technology, specifically an elevator shaft seismic isolation device that penetrates a seismic isolation zone. It includes an upper structure and a lower structure, with a seismic isolation support between them. The upper structure includes an upper floor slab, with an elevator shaft vertically positioned in the middle of the upper floor slab. The lower structure includes a raft foundation, with an elevator shaft seismic isolation mechanism positioned between the raft foundation and the elevator shaft. The elevator shaft seismic isolation mechanism includes a bottom steel plate on the upper surface of the raft foundation and a top steel plate on the lower surface of the elevator shaft's bottom slab, with a seismic isolation assembly positioned between the bottom and top steel plates. This invention solves the problem of existing methods for treating elevator shafts penetrating seismic isolation layers where the elevator shaft structure cannot coordinate with the overall deformation of the seismic isolation layer, leading to a forced displacement difference between the bottom and the lower foundation, easy shear failure, torsional deformation, or instability, thus affecting elevator operation and threatening personnel safety.

The application provides a controlled structure damping device and a manufacturing method thereof. The device comprises a guide rail component, a connecting rod component and a damping tube. The guide rail component is installed on the controlled structure. One end of the connecting rod component is slidably arranged on the guide rail component. The guide rail component is limitedly matched with the sliding end of the connecting rod component when the guide rail component moves to a preset displacement. The damping tube comprises a torsion deformation area and a fixed connection area. The other end of the connecting rod component is fixedly connected with the torsion deformation area. The fixed connection area is installed on a fixed structure. The manufacturing method comprises determining the design length of the damping tube and the connecting rod component, which comprises setting the maximum torsional force and the maximum torsional deformation of the damping tube; setting the diameter of the damping tube; determining the design length of the damping tube according to the preset torsional stiffness of the damping tube; and determining the design length of the vertical connecting rod of the connecting rod component according to the design length of the damping tube. The application has the advantages of good damping and energy dissipation effect, and high reliability in daily use.

The utility model relates to the field of hinge discloses a small size embedded hinge, including two sleeves, two sleeve all weld in the right side of female hinge, the inner wall of sleeve inserts with central axis, the right side of female hinge sets up sub hinge, the left side of sub hinge is welded with a plurality of connecting barrels, the connecting barrel corresponds with sleeve, the connecting barrel is equipped in the outer wall of central axis, two connecting frames are welded on the sub hinge, one end of connecting frame is welded with support cylinder, the support cylinder corresponds with connecting barrel, the support cylinder is equipped in the outer wall of central axis, in the utility model, through the cooperation of connecting frame, support cylinder and X-shaped support frame, can disperse stress through the principle of triangular truss when sub hinge bears axial load, forms multidirectional constraint when sub hinge is loaded, effectively prevents the bending and torsional deformation of sub hinge and connecting barrel under stress, and simultaneously spreads local stress to the whole of connecting frame.

The utility model discloses a kind of anti-torque control cables of high shielding effectiveness, belong to cable field, comprising: a plurality of conductor assemblies;Sub-screening layer, including first shielding layer and current-carrying wire, first shielding layer is wrapped in a plurality of conductor assemblies outside, current-carrying wire is resisted to first shielding layer outside;Sub-screening layer wrapped in first shielding layer outside, current-carrying wire is located in sub-screening layer inside;Total shielding layer, including second shielding layer and third shielding layer wrapped in sub-screening layer outside in turn;Outer sheath wrapped in third shielding layer outside, the material of outer sheath is thermoplastic vulcanized rubber.Conductor assembly includes: a plurality of conductor units;Sub-twisted layer wrapped in a plurality of conductor units outside, first shielding layer is wrapped in sub-twisted layer outside.The technical effect of the utility model is in that it not only has high shielding effectiveness, and it is not easy to crack after repeated torsional deformation.

This invention discloses a repeatable locking mechanism based on disc spring unstable switching, including a support housing, a spindle, a motor assembly, a screw, a slider, a nut slider, a conical coil spring, a disc spring, and a self-locking mechanism. The invention also discloses a method for operating the above-mentioned repeatable locking mechanism, including: the motor assembly driving the spindle to rotate; the slider moving to a first driving position engaging with the upper screw, the spindle driving the upper screw to rotate via the slider; the upper screw driving the upper nut slider to move up and down, locking or unlocking the self-locking mechanism A; the upper screw driving the upper nut slider to continue moving downwards, after the conical coil spring undergoes torsional deformation, the nut slider pushes the slider downwards, causing the slider to move to a second driving position engaging with the lower screw, the spindle driving the lower screw to rotate via the slider. This invention enables selective locking and further improves the stiffness of the flexible arm.

This invention relates to the field of smart glasses manufacturing equipment technology, and discloses a bending tool for the FPC cable inside the temple of smart glasses. The tool includes a double-crease forming component that presses the middle section panel of the FPC to form creases, a bending forming component that punches the middle section of the FPC downwards and bends and lifts the lower and upper sections of the panel, and a following-flipping component that synchronously bends the speaker integrated with the upper section panel. This tool, through distributed punching, first precisely creases the upper, middle, and lower sections of the FPC, and then performs a second punching and bending to shape them, preventing internal circuit breakage or hidden damage from the first punching process and ensuring the lifespan of the FPC. The following-flipping component synchronously rotates the upper section panel of the FPC, along with the integrated speaker, by 90 degrees during the second punching and bending, effectively removing the internal stress generated by the twisting deformation of the upper section panel during flipping and preventing breakage damage due to torsional deformation.

The application provides an air outlet device, and relates to the technical field of vehicle-mounted equipment. The air outlet device comprises a blade string, a driving mechanism and a clutch mechanism. The blade string comprises a plurality of blade units. The driving mechanism is used for driving the overall rotation of the blade string or the relative rotation between at least two blade units in the plurality of blade units. The clutch mechanism has a coupling state and a decoupling state. When the clutch mechanism is in the coupling state, the clutch mechanism applies a locking force to one end of the blade string, and the driving mechanism applies a driving force to the other end of the blade string, so that the relative rotation between at least two blade units in the plurality of blade units occurs. When the clutch mechanism is in the decoupling state, the driving mechanism drives the overall rotation of the blade string. When the clutch mechanism is in the coupling state, the locking force is smaller than the driving force. By arranging the clutch mechanism, the blade string avoids the torsional deformation, impact and noise caused by the excessive rotation or insufficient rotation of the switching angle during the switching process.

The present application relates to gear machining technical field, especially a kind of variable tooth thickness modification machining method for double lead worm gear and worm, including the wave form distortion rate of idle cutting force of hobbing cutter and torsional stiffness coefficient;Real-time monitoring cutting force wave form distortion rate and tool torsional deformation, calculate disturbance intensity index to divide disturbance level and set detection opportunity;Through the tooth thickness curve of actual measurement, tooth thickness change rate coefficient is obtained to judge machining quality;The tooth thickness deviation curve of unqualified tooth groove is analyzed to determine the dominant interference type, and the spindle speed or tool pose is regulated based on disturbance level;The control effect is verified by attenuation coefficient;When not up to standard, attenuation difference is used to optimize control coefficient;Finally, the overall quality of worm is evaluated by the consistency coefficient of tooth thickness change rate of each tooth groove of full tooth surface.The present application solves the problem that the full tooth surface consistency of formed worm is low due to the resonance and deformation disturbance of asymmetric characteristics of hobbing cutter in variable tooth thickness worm machining.

The utility model discloses a kind of D type cable moulding press device, including rack, pressure sensor, support base, lower extrusion wheel, pressure display, upper extrusion wheel, arc ring groove, lifting guide rail plate, lifting slider, electric lifting hydraulic cylinder, first distance sensor, first hydraulic lock and control hub, the semicircular conductor wire core of D type cable can be moulding press anti-torsional deformation by the arc ring groove cooperation of upper extrusion wheel and the circumference of lower extrusion wheel, upper extrusion wheel can be freely positioned adjustment moulding press gap width, lifting slider can be trajectory limited to upper extrusion wheel with lifting guide rail plate, avoid upper extrusion wheel stress swing, first hydraulic lock can lock the lifting part of electric lifting hydraulic cylinder, ensure that upper extrusion wheel position is stable and unchangeable, wide in application, beneficial to promote cable quality.

This utility model discloses a reinforced anti-torsion crash pad and its highway crash barrier, relating to the technical field of road traffic safety facilities. The crash pad includes a crash pad body, whose frontal surface is formed with multiple sets of crest sections and trough sections from top to bottom. The bottom edge of the lowest trough section has an extending anti-torsion extension rib, which is offset from the plane of the trough section. The highway crash barrier includes a base slide and multiple sliding mounting brackets slidably connected thereto. Reinforced anti-torsion crash pads are connected to both sides of adjacent sliding mounting brackets. This utility model significantly enhances the structural strength of the lowest trough section by setting an anti-torsion extension rib, effectively preventing torsional deformation and overall upward warping, improving the stability and service life of the crash pad, and effectively solving the problems of poor structural stability and insufficient energy absorption of existing crash pads, providing a more reliable protection solution for highway traffic safety.

The utility model provides a loudspeaker with a collision protection structure, which relates to the technical field of loudspeakers, and comprises a loudspeaker, and an upper protection plate is arranged in the upper half area of the front side of the loudspeaker; in normal application, the front end faces of the upper protection plate and the lower protection plate are unfolded at an angle of 85 degrees with the front end face of the loudspeaker mounting plate, and when the loudspeaker is collided in the front or impacted by external force, the upper protection plate and the lower protection plate in the unfolded state can rotate towards the loudspeaker cone around the respective rotating shafts, so that the loudspeaker is protected. The upper torsion spring and the lower torsion spring generate torsion deformation synchronously, impact energy is absorbed through elastic deformation and converted into elastic potential energy to be stored, a buffering mechanism is formed, and direct impact of external force on the loudspeaker can be effectively attenuated. The problems that a fixed grating or a baffle and other protective structures adopted by a traditional loudspeaker block sound production during normal use, the tone quality is affected, energy cannot be effectively absorbed through deformation when the loudspeaker is impacted, and the buffering protection effect on a cone area is limited are solved.