216 results about "Contact friction" patented technology

The invention relates to the field of electro connecting pressure gauges, in particular to an electro connecting pressure gauge with an alarm function, which comprises an external pipeline connected with an external pressure pipeline, the outer end face of the external pipeline is fixedly connected with a dial plate, and a transparent shield is embedded and matched on the dial plate; the pointer adjusting mechanism is used for adjusting the position of the pointer, and the pointer adjusting mechanism is arranged in the center of the transparent shield; the pointer mechanism is used for carrying out alarm processing when an upper limit is exceeded or a lower limit is lower, and the pointer mechanism is arranged on the dial plate and is protected by the transparent protective cover; wherein the pointer adjusting mechanism comprises a circular groove, the circular groove is formed in the top of the transparent protective cover, and according to the electric contact pressure gauge with the alarm function, a friction damper (such as metal sheet contact friction) is arranged on a reset path, vibration energy is consumed through friction, and impact and residual vibration of the second bourdon tube in the reset process are reduced.

The invention discloses a near-net forming friction welding method for a dissimilar metal stud based on a middle layer, which comprises the following steps of: pre-processing a similar T-shaped boss with a thread or a circular truncated cone-shaped boss without a thread section on the end surface of a workpiece with high hardness, and pre-processing a corresponding similar T-shaped groove or a circular truncated cone-shaped groove on the end surface of a workpiece with low hardness; and before welding, middle-layer alloy is placed at the upper end and the bottom of the T-like groove or the bottom of the circular-truncated-cone-shaped groove, and the welding steps comprise rotary pressing, rotary pressing and friction, sudden stop and upsetting. The intermediate layer alloy is used as a medium, direct contact friction of a welded workpiece is avoided, surface oxidation films of adjacent base metal are broken and gaps are filled through severe plastic deformation of the intermediate layer under rotary extrusion of the workpiece, and effective welding under the conditions of low upsetting friction pressure and no obvious deformation of the workpiece is achieved. And a dissimilar metal welding interface is prevented from being overheated to generate an overthick intermetallic compound, subsequent machining is omitted, near-net forming of a friction welding joint is achieved, and the production efficiency is improved.

The invention relates to the field of foundation detection, in particular to an impact-controllable foundation strength detection device and method for building construction, and the device comprises a steel chisel main body, an annular transmission block, a piercing hammer and a coaxial release mechanism; the coaxial releasing mechanism comprises a coaxial connecting ring, a plurality of force applying structures and a buffering assembly, the coaxial connecting ring is coaxially connected with the steel chisel body, a plurality of lifting lugs are arranged on the coaxial connecting ring at equal intervals, the force applying structures are arranged on the lifting lugs correspondingly, the force applying structures are used for applying radial acting force to the piercing hammer, and the buffering assembly is used for buffering the piercing hammer. The acting force applied to the piercing hammer by the force application structures is the same in magnitude, and the buffer assembly is connected with the coaxial connecting ring and the steel chisel body and used for reducing vibration borne by the coaxial connecting ring. The steel chisel is provided with the steel chisel body, the piercing hammer and the coaxial release mechanism, so that energy loss caused by eccentricity or contact friction of the piercing hammer is avoided, and the impact amount of the piercing hammer is precisely controllable.

The utility model belongs to the technical field of chimneys, and particularly relates to a self-standing steel chimney damper which comprises symmetrically-arranged fixing rings, a winding shaft is rotationally connected between the fixing rings at the top end, the fixing rings at the lower portion are fixedly connected through a sliding rod, the two fixing rings are fixedly connected through a friction plate, and the friction plate is fixedly connected with the winding shaft. A shell is slidably connected to the outer surfaces of the friction plate and the sliding rod, a friction block is slidably connected into the shell and makes contact with the friction plate, a traction rope is fixedly installed at the top end of the friction block, the traction rope penetrates through the shell and extends to the outer side of the shell, and the end, away from the friction block, of the traction rope is wound and fixed to the outer surface of the winding shaft. According to the self-standing steel chimney damper, the pulling rope is arranged to pull the friction block and increase the pressure between the friction block and the friction plate, so that the friction force between the friction block and the friction plate can be increased, the damping force can be increased, and the damping can be changed through the arrangement.

The application relates to a friction build-up welding repair method for metal parts and relates to the technical field of welding repair of metal materials. The main technical scheme is that in the process of adopting a raw material rod to perform friction build-up welding treatment on a metal part, a set type of cooling medium is applied to the raw material rod and the metal part in a set mode, heat generated in the friction build-up welding process is timely conducted, excessive softening and deformation of the raw material rod are inhibited, and the top forging pressure and the friction force of the raw material rod acting on the surface of the metal part are improved. The application is mainly used for improving the stability of the contact friction force and the top forging pressure of the raw material rod and the surface of the metal part in the friction build-up welding process, thereby promoting metallurgical combination of a build-up welding layer and a metal part interface, and thereby solving the problems of poor interface combination, poor surface forming quality, high repair cost and low material utilization rate of the existing friction build-up welding repair.

The utility model relates to a kind of coating device with antiskid conveying structure, core improvement is to replace the first over roller of traditional metal over roller of winding guide roller group with plastic material and the first over roller of surface being equipped with antiskid structure, to solve traditional technical defects.Plastic material friction coefficient is higher than metal, can naturally promote and the contact friction of flexible copper-clad plate substrate, surface antiskid structure is matched, can further increase effective contact area, make friction force multiple level promotion, ensure that flexible copper-clad plate substrate is stably and uniformly conveyed to winding mechanism.Meanwhile, plastic thermal conductivity is far lower than metal, surface temperature is little by environmental temperature and humidity fluctuation, not easy to reduce to dew point temperature below, reduce the condensation of over roller surface water vapor from the source, greatly reduce the probability of dewing, both eliminate the negative influence of water droplet on friction coefficient, consolidate antiskid effect, prevent flexible copper-clad plate substrate from being damp and deforming, improve the reliability and service life of final product.

The invention discloses a novel roller type conveying device of a drawing machine, and relates to the technical field of copper material conveying equipment. Comprising a conveying table, a motor is arranged on one side of the conveying table, a plurality of sets of conveying rollers are arranged on the inner side of the conveying table, the output end of the motor is fixedly connected with one ends of the conveying rollers, a notch is formed in one side of the conveying table, and a guide groove is formed between every two adjacent sets of conveying rollers. And one end of the guide groove extends to the notch. According to the novel roller type conveying device of the drawing machine, the high-temperature felt conveying belt is matched with the rubber sleeves on the outer sides of the belt rollers, the contact friction force between the high-temperature felt conveying belt and the copper bars is increased, scratches are avoided in the conveying process, the conveying belt and the belt rollers are driven by the gravity of the copper bars to rotate, extra power is not needed, and damage to the surfaces of the copper bars caused by hard contact is reduced.

The utility model relates to the technical field of bearings, in particular to a noise reduction type sliding bearing for a wind turbine generator, which comprises a first bearing seat and a second bearing seat, connecting supports are arranged on the inner side of the first bearing seat and the inner side of the second bearing seat, and an upper bearing bush and a lower bearing bush are fixedly connected to the inner surfaces of the two connecting supports respectively. The arc-shaped cavities in the first bearing seat and the second bearing seat are matched with the communicating mechanism composed of the first communicating pipe and the second communicating pipe, the first oil cavity is communicated with the second oil cavity, the first oil cavity is communicated with the second oil cavity through the communicating mechanism composed of the first communicating pipe and the second communicating pipe, and the oil cavity is communicated with the second oil cavity through the connecting support. The first oil cavity and the second oil cavity are prevented from being provided with openings and directly butted and communicated through the openings to cause oil leakage at the joint, and the situation that the service life of the bearing is affected by aggravation of friction due to direct contact friction of the metal surface caused by rapid loss of lubricating oil can be prevented.

The utility model relates to the technical field of multi-core electric energy meters, in particular to a multi-core electric energy meter harmonic test device, which comprises two box bodies, the two box bodies are rotatably connected through a hinge, the box bodies are provided with cavities for storing devices, the box bodies are provided with a plurality of first rollers, the box bodies are provided with a plurality of second rollers, and the first rollers and the second rollers are arranged on the box bodies. A second protection thin plate used for protecting the device is arranged in the box body, a clamping groove is formed in the box body, a buckle body is fixedly installed on the box body, and the buckle body is matched with the clamping groove. Through the arrangement of the first roller and the second roller, a worker can additionally select one transportation mode when transporting the box body, so that the transportation efficiency of the box body is improved, the phenomenon that the hinge is in contact friction with the ground is reduced, the service life of the hinge is prolonged, and the cost is reduced. And meanwhile, the first rolling wheels and the second rolling wheels can effectively improve the transportation efficiency of workers.

A sleeved type anti-eccentric-wear oil pipe pup joint assembly comprises an oil pipe pup joint outer sleeve, and annular clamping grooves are symmetrically formed in the positions, close to the two ends, of an inner hole of the oil pipe pup joint outer sleeve. Positioning sleeves are inserted into the two ends in the oil pipe pup joint outer sleeve respectively, an inner hole of each positioning sleeve is in a step shape, a plurality of open grooves are evenly distributed in the circumference of the small hole end of each positioning sleeve, and an annular boss is arranged at the end, close to the small hole, of the outer edge of each positioning sleeve and clamped in the corresponding annular clamping groove. End bushings are respectively inserted into the inner holes of the positioning sleeves at the ends of the large holes, and the inner ends of the end bushings are provided with conical openings and are tightly attached to the shoulders of the inner holes of the positioning sleeves; a middle lining is embedded between the two positioning sleeves in the oil pipe pup joint outer sleeve, the two ends of the middle lining are tightly attached to the end linings, the inner diameters of the two ends of the middle lining and the end linings are consistent, and the middle lining and the end linings are made of abrasion-resistant, oil-resistant and temperature-resistant materials and used for avoiding contact friction between the sucker rod and an oil pipe. The device has the beneficial effects that direct eccentric wear between the sucker rod and the oil pipe can be prevented, and oil leakage caused by wear of the oil pipe and rod breakage caused by fine grinding of the sucker rod are avoided.

The utility model relates to the technical field of tunnel construction, in particular to an anti-slip device of a tunnel frequency conversion locomotive, which comprises a frame, a track and a brake cylinder, the surface of the frame is fixedly connected with a mounting plate, an output shaft of the brake cylinder is fixedly connected with a four-claw connecting piece, and the surface of the four-claw connecting piece is movably connected with a secondary connecting piece. Through the connection of the output shaft of the brake cylinder and the four-claw connecting piece, under the connection of the first brake rocker and the first pull rod and the connection of the second brake rocker and the second pull rod, the action angles of the first brake rocker and the second brake rocker are changed by changing the length of the output shaft of the brake cylinder; under the connection of the first brake shoe and the first brake rocker and the connection of the second brake rocker and the second brake shoe, the contact friction force is increased through the abutting contact of the first brake shoe and the second brake shoe with the track, the anti-slip effect on the locomotive is achieved, and the use safety performance of the locomotive is improved.

The application relates to an automobile door glass assembly, belonging to the technical field of automobile part assembly. The automobile door glass assembly comprises an outer frame body, a bottom plate, a base, a separation assembly, an assembly cross beam and a plurality of mechanical wheels. The separation assembly comprises a plurality of separation vertical plates and a top cover. The separation vertical plates and the top cover are both made of plastic material. The upper surface of the base is provided with a plurality of first through grooves and a plurality of second through grooves. The plurality of first through grooves and the plurality of second through grooves are both arranged in parallel. The lower edge of each separation vertical plate is correspondingly clamped in a second through groove. The upper edge of each separation vertical plate is clamped with the top cover. The application can reduce scratches on the surface of the automobile door glass caused by contact friction during transportation.

The invention discloses a rolling-sliding contact friction-wear test device based on an epicyclic gear train. The rolling-sliding contact friction-wear test device comprises a central gear, planetary gears, a gear ring, an upper gear, balls, an inner raceway, an outer raceway, a first motor, a second motor and a third motor, an annular groove matched with the balls is formed between the outer raceway and the inner raceway; the first motor is connected with the central gear through a central shaft; the inner raceway is coaxially fixed with the central gear; the second motor is connected with the upper gear; the outer raceway is provided with outer gear teeth, the gear ring is provided with outer gear teeth and inner gear teeth, and the outer raceway and the gear ring are coaxially fixed; the upper gear is meshed with the outer roller path and the outer gear teeth of the gear ring; the third motor is connected with the planet carrier; a plurality of planet gears are arranged on the planet carrier at equal intervals in the circumferential direction; the planetary gear is meshed with the sun gear and the inner gear teeth of the gear ring and is fixed with one ball; according to the invention, the ball movement condition of the ball in a ball screw and other similar mechanical structures can be simulated.

A crankshaft in the compressor comprises a long shaft part, an eccentric part and a short shaft part which are sequentially arranged in the axial direction, the shaft diameter of the long shaft part is r1, the shaft diameter of the short shaft part is r2, r1 is larger than or equal to 18 mm and smaller than or equal to 20 mm, and r2 is larger than or equal to 16 mm and smaller than or equal to 18 mm. By reducing the shaft diameters of the long and short shafts of the crankshaft, the contact area between the crankshaft and the upper and lower bearings is reduced, the contact friction between the crankshaft and the upper and lower bearings is reduced, the mechanical loss of the compressor can be reduced, the working efficiency of the compressor is improved, and the performance of the compressor is improved.

The application discloses a metal piece impact forming device for preventing impact deviation of a metal workpiece, and is characterized in that a base is arranged, a positioning seat is arranged above the base, the top of the positioning seat is used for placing a metal plate, a module capable of moving up and down is arranged above the metal plate, first pressing rollers are arranged on both sides of the positioning seat, the two first pressing rollers are driven to move up and down by first driving members arranged below the first pressing rollers, and the nearest distance between one side of the two first pressing rollers close to the side edge of the module and the side edge of the module is equal to the thickness of the metal plate. The middle part of the metal plate is positioned by the positioning seat and the module, the two sides of the metal plate are impacted and formed by the first pressing rollers moving upwards, the first pressing rollers and the metal plate are in rolling contact, the friction force is small, the surface debris of the metal plate is not easy to peel off, even if there is debris on the first pressing roller, a brush is arranged to remove the debris on the first pressing roller, and the forming precision of the metal plate is not affected.

The invention belongs to the technical field of belt replacement of belt conveyors, and particularly relates to a hydraulically-driven self-adaptive anti-slip belt clamping device and method.A conveying belt of the device moves on a first set of carrier rollers and a second set of carrier rollers, and a clamping device is located between the first set of carrier rollers and the second set of carrier rollers and fixed to the ground; the front end of the clamping device is connected with a friction wheel through a supporting frame, the friction wheel makes contact with the conveying belt, and an explosion-proof high-precision photoelectric encoder is fixedly connected to the friction wheel and used for detecting the running speed of the conveying belt. The fixed clamping unit on the upper portion of the clamping device is located above the conveying belt, the movable clamping unit on the lower portion of the clamping device is driven by the hydraulic driving device and used for being matched with the fixed clamping unit to clamp the conveying belt, and the hydraulic driving device is connected with a wheel shaft of the friction wheel. Automatic detection and clamping control over the conveying belt in the belt replacing process are achieved, and the safety and the automation level of belt replacing operation are effectively improved.

The utility model relates to the technical field of dies, in particular to a forming die of an oxide ceramic product, which comprises a base, a die mechanism is arranged on the base and used for forming the oxide ceramic product, the die mechanism comprises a lower die, an upper die and a lower die, the lower die comprises a lower die holder fixed at the top of the base, and an inner cavity is arranged at the upper end in the lower die holder; four straight grooves distributed circumferentially are formed in the lower end of the interior of the inner cavity, sliding blocks are slidably installed in the straight grooves, a shaping plate is fixed to the upper ends of the sliding blocks, a circular plate is rotatably installed at the lower end of the interior of the lower die base, four arc grooves distributed circumferentially are formed in the outer edge of the upper end of the circular plate, cams are rotatably installed at the lower ends of the sliding blocks, and the cams are located in the arc grooves; a driving piece is mounted on the lower die holder and is used for driving the circular plate to rotate; the upper mold is arranged above the lower mold and is used for compacting the filler in the lower mold; the outer wall of the product and the shaping plate are free of contact friction during demolding, internal damage is avoided, it is guaranteed that no hidden defect exists after sintering, and the quality and yield of finished products are remarkably improved.

The utility model discloses a preassembled nut anti-drop injection molding part, which comprises a preassembled nut, the preassembled nut enters a hole groove with an adaptive size arranged on the injection molding part through stamping, a plurality of latches are integrally formed on the periphery of the preassembled nut, the latches are distributed at intervals along the axial direction of the preassembled nut, an annular notch is formed between every two adjacent latches, and the preassembled nut is inserted into the hole groove. The annular notch is sleeved with a plurality of annular blocking layers, and the outer diameter of the outermost blocking layer is equal to the outer diameter of the annular notch. According to the injection molding part capable of preventing the preassembled nut from falling off, the clamping teeth which are arranged at intervals are integrally formed on the periphery of the preassembled nut, the annular notches are formed among the clamping teeth, the hollow flexible wrapping sleeve is sleeved at the annular notches firstly, and then the thin elastic cushion is nested at the annular notches, so that the wrapping sleeve on the inner side can be restrained to be in a relatively regular state, and the preassembled nut can be prevented from falling off. And the annular gap is completely filled outwards and is in contact with the inner wall of the hole groove, so that the contact friction force is further increased, and the problem that the preassembled nut falls off after swinging and shaking is avoided.

The utility model belongs to mechanical drive technical field, and disclose high -speed standard formula planetary roller screw structure, including screw rod, roller, nut, inner toothed ring, retainer and elastic baffle ring, the outer surface of screw rod is provided with triangle multi -head outer thread, the outside of roller is provided with ring tooth, the pitch of ring tooth is same with the screw pitch of screw rod, the both sides of ring tooth on roller are provided with gear, the inner chamber of nut is provided with oil storage groove, the inner surface of nut is processed with triangle multi -head inner thread that matches with screw rod and roller, the inner toothed ring sets up in the both end inner wall of nut, the inner toothed ring is connected with the gear of roller, the retainer is connected in the both end of roller, the lubricant that injects through oil injection hole can store in oil storage groove and even delivery to the meshing area of roller and screw rod, nut along helical oil channel, form continuous lubricating film, reduce the wear and heating that line contact friction leads to, promote high -speed operation stability.

The utility model discloses a kind of inclined plane anti-stuck material's ball rotator, belong to conveying belt anti-stuck material structure technical field, including rack, its inside is equipped with drive chain belt group, several array arrangements ball shaft rod are installed on the drive chain belt group;Wherein, the one end of the rack is fixedly installed with several symmetrical arrangements anti-stuck material brush tool, and its end portion is contacted with ball shaft rod.The technical points are as follows: through the anti-stuck material brush tool set, it can be contacted with the drive brush set on it with the way of friction, drive under the drive of drive chain belt group and pass through the ball shaft rod rotation here, and ball shaft rod can exert outward thrust to material when rotating, push the material stuck in gap to make it fall off and separate from conveying surface, the above scheme can prevent material from being stuck by self-cleaning measures to prevent the effect of affecting conveying capacity.

The utility model provides a quincuncial groove with anti-skid textures and a miniature fastener, which relate to the technical field of mechanical fasteners and comprise a driving head, an outer hexagon bolt head, a stud, a gasket and a nut. The outer hexagon bolt head movably sleeves the outer wall of the driving head, the outer hexagon bolt head and the driving head are detachably connected with the pin through the through hole, and the top surface of the driving head is provided with a plum blossom groove and anti-skid lines to support double-tool driving of a wrench or a plum blossom screwdriver, so that the operation flexibility is improved. The first anti-sliding block is arranged at the bottom of the driving head, the second anti-sliding blocks are arranged on the upper side and the lower side of the gasket, and the third anti-sliding block is arranged at the top of the nut. An anti-disengaging groove is formed in the outer wall of the stud, a flexible clamping rod is arranged on the inner wall of the nut, the clamping rod is embedded into the anti-disengaging groove and a clamping groove of a connected piece, a double-thread and mechanical limiting anti-loosening structure is formed, and the nut is prevented from loosening. The fastener is diversified in function, stable in installation, reliable in looseness prevention and suitable for various scenes, and operation convenience and fastening reliability are both considered.

The utility model provides a gluing device and composite board production equipment, and the gluing device comprises a gluing rack, a gluing mechanism and a gluing mechanism, the conveying component is arranged on the gluing rack and used for conveying the first plate; the gluing component comprises a first gluing assembly arranged above the conveying component, the first gluing assembly comprises a gluing unit, the gluing unit comprises a gluing support, a glue containing groove formed in the gluing support, a gluing motor, a first gluing roller, a second gluing roller driven by the gluing motor and a third gluing roller, and the third gluing roller and the first gluing roller rotate synchronously. Glue coating materials in a glue containing groove are in frictional contact with the outer roller face of a first glue coating roller, a glue coating motor drives a second glue coating roller to make frictional contact with the first glue coating roller, and therefore the glue coating materials on the first glue coating roller are distributed on the roller face of the second glue coating roller, and a third glue coating roller makes contact and friction with the roller face of the second glue coating roller so that the glue coating materials can be evenly distributed on the third glue coating roller; and the third gluing roller makes contact with the first plate to conduct gluing action, and gluing is even.

The application discloses a compliant variable stiffness curved beam supporting ultra-low frequency vibration isolation device, which comprises a main frame, a main connecting rod movably arranged in the main frame, and a negative stiffness mechanism and a positive stiffness mechanism coupled in parallel to the main connecting rod, wherein the negative stiffness mechanism with nonlinear negative stiffness is sleeved on the main connecting rod, the positive stiffness mechanism with nonlinear positive stiffness is fixed at one end on the main frame and is fixedly connected at the other end with the main connecting rod, the nonlinear positive stiffness mechanism is used for modulating the nonlinear negative stiffness mechanism, and the high static stiffness and low dynamic stiffness characteristics are realized. The application adopts the arc-shaped beam with double-end clamping to provide the nonlinear negative stiffness, adopts the spiral-shaped beam to provide the nonlinear positive stiffness and the guiding function, and adopts the parallel arc-shaped beam and spiral-shaped beam to realize the high static stiffness and low dynamic stiffness characteristics. The stiffness of the vibration isolation device only needs to be modulated by adjusting the coupling connection relationship of the positive stiffness mechanism and the negative stiffness mechanism, the configuration parameters of the elastic elements do not need to be changed or the elements do not need to be replaced, the stiffness modulation is flexible, and the ultra-low dynamic stiffness can be easily realized. The vibration isolation device adopts the compliant design, is convenient to assemble, has no motion gap and contact friction limitation, and can realize the ultra-low frequency vibration isolation.

The utility model belongs to the technical field of hydraulic pipes, and particularly relates to a flame-retardant wear-resistant rubber hydraulic pipe which comprises a hydraulic pipe body. The hydraulic pipe body comprises an outer rubber layer, the outer rubber layer is wrapped with a waterproof layer, the waterproof layer is wrapped with a flame-retardant layer, a wear-resistant assembly is arranged outside the flame-retardant layer and comprises a soft wear-resistant layer and a hard wear-resistant layer, and a connecting steel wire is arranged on the hard wear-resistant layer. The wear-resisting performance of the hydraulic pipe can be improved through the soft wear-resisting layer and the hard wear-resisting layer, damage caused by contact friction between the hydraulic pipe and other workpieces in the working process is prevented, and therefore the service life of the hydraulic pipe is prolonged.

The application provides a rubber roller and a conveying device. The rubber roller comprises a main shaft, a shaft sleeve and a rubber sleeve. The shaft sleeve is rotatably sleeved on the outer circumferential surface of the main shaft and coaxially arranged with the main shaft. The outer circumferential surface of the shaft sleeve is provided with anti-skid lines. The inner diameter of the rubber sleeve is slightly smaller than the outer diameter of the shaft sleeve, and the rubber sleeve is tightly sleeved on the outer surface of the shaft sleeve through interference fit, so that the inner surface of the rubber sleeve and the anti-skid lines of the shaft sleeve form a mechanical engagement structure. The anti-skid lines of the shaft sleeve can effectively increase the contact friction with the rubber sleeve and reduce the risk of slipping between the two in a heavy oil environment. The conveying device provided by the application comprises the above rubber roller, and therefore has the advantages of the above rubber roller.

The vibration reduction structure comprises an elastic body, the elastic body is used for being arranged on a pipeline in a sleeving mode, the elastic body is provided with a deformation groove, a first included angle exists between the extending direction of the deformation groove and the deformation direction of the elastic body, and the degree of the first included angle is larger than 0 degree and smaller than 180 degrees; when the pipeline vibrates and enables the elastic body to deform, the two opposite side walls of the deformation groove make contact and rub with each other. The deformation groove is formed in the outer surface of the elastic body, when the pipeline vibrates, the elastic body correspondingly deforms and drives the two opposite side walls of the deformation groove to get close until contact friction occurs, the friction force between the two side walls can be used for resisting deformation of the elastic body, and then vibration of the pipeline is restrained; the vibration amplitude and frequency of the pipeline are effectively reduced, and the service life of the pipeline is guaranteed.

The application discloses a window door handle which is not easy to slip, belongs to the technical field of door and window components, and is used for providing a window door handle which is easier to close and not easy to slip, and comprises a cantilever, one side of the cantilever is provided with a friction strip, the other side opposite to the friction strip is provided with a silica gel pad, one end of the cantilever is provided with a handle, the handle is located at the side of the silica gel pad, the other end of the cantilever is provided with a hook, the hook is bent to the side of the handle, one end of the handle away from the cantilever is provided with a rotation stopping block, the geometric center line of the rotation stopping block is collinear with the axis of the handle, and a through hole penetrating through the handle is formed in the end face of the rotation stopping block. The hook structure which is bent to the window door frame is arranged at the end of the window door handle, the operator's palm and even fingers are effectively prevented from loosening, and it is easier to close the window which is opened outward and far away from the handle; the friction strip is arranged on the front surface of the handle, and the silica gel pad with a friction groove is arranged on the back surface of the handle, so that the contact friction force between the handle and the operator's hand is effectively increased.

The utility model discloses an intermittent die cutting swing roller structure which comprises a rack, a driving assembly, a transmission assembly, a swing roller assembly and a pair of guide assemblies, and the two ends of the swing roller assembly in the length direction are arranged on the guide assemblies; the driving assembly drives the transmission assembly and then drives the swing roller assembly, and the swing roller assembly conducts intermittent reciprocating motion along horizontal linear guiding of the guiding assembly. The pair of guide assemblies comprises at least one guide rail and at least one rolling piece, the pair of guide rails are arranged on the rack in the length direction, and the pair of rolling pieces are arranged at the bottoms of the two ends of the swing roller assembly. A pair of rolling pieces are arranged at the bottom of the swing roller assembly to roll along the side edges of a pair of guide rails, and the swing roller assembly is horizontally guided in a rolling mode. The rolling motion is linear contact, the friction coefficient is small, the abrasion is reduced, the action can be quickly responded, and the reciprocating motion speed is high.

The invention discloses a high-altitude anti-falling device which comprises an upper fixing mechanism, a lower fixing mechanism, a steel strand, an anti-swing mechanism and an anti-falling self-locking device, the anti-falling self-locking device comprises an anti-falling self-locking shell, the anti-falling self-locking shell is provided with a channel matched with the steel strand, and a first self-locking arm, a second self-locking arm and a friction wheel are rotationally arranged on the inner side of the anti-falling self-locking shell; a retaining ring is arranged at one end of the first self-locking arm, and a linkage assembly is arranged between the first self-locking arm and the second self-locking arm. The friction wheel is in movable contact with the steel strand, the friction wheel is provided with a locking assembly for locking the friction wheel, and the locking assembly is in linkage fit with the first self-locking arm or the second self-locking arm. According to the anti-falling self-locking device, the first self-locking arm, the second self-locking arm, the friction wheel and the like are adopted, rapid self-locking can be achieved when a worker falls from high altitude, the worker is prevented from falling, and the anti-falling self-locking device is simple in structure, convenient to use, high in practicability and capable of providing powerful protection for the worker to go up and down a tower.

This invention discloses a finite element simulation method and system for a suspension bridge tower top saddle. The method includes: collecting multiple types of parameters; iteratively solving for tangential and normal forces based on an initial tangential stiffness matrix; calculating the actual contact friction coefficient based on the coupling relationship between temperature and contact normal pressure; calculating a tangential correction coefficient based on the actual contact friction coefficient, the ratio of tangential to normal forces, and the linkage relationship between the saddle geometric parameters; dynamically adjusting the tangential stiffness matrix based on the correction coefficient, the saddle pre-offset, and the synergistic relationship between cable stress; constructing a finite element model and simulating it; and iteratively optimizing until convergence. The system corresponds to the modules described above. This invention optimizes simulation accuracy through multi-factor coupling and linkage, adapting to complex working conditions and providing reliable support for the design and construction of suspension bridges.