616 results about "Static friction" patented technology

The invention relates to the field of transmission towers, and discloses a tension type transmission tower buffer connecting device which comprises a supporting frame, a plurality of isolation assemblies are symmetrically arranged on the upper surface of the supporting frame, sliding seats are slidably connected into the isolation assemblies, and connecting rods are fixedly connected to the outer surfaces of the sliding seats. A belleville spring set is arranged between the outer surface of the sliding base and the inner wall of the isolation assembly, the belleville spring set is arranged on the outer surface of the connecting rod in a sleeving mode, and a telescopic rod and a first spring are fixedly connected between the outer surface of the sliding base and the inner wall of the isolation assembly. A primary buffer layer is formed by the belleville spring set and the first spring, axial impact force can be absorbed without sliding of the sliding seat during daily wind vibration and wire slight galloping, meanwhile, vibration can be restrained through the huge static friction torque of the fan-shaped friction face and the friction ball in the omnidirectional damping assembly, the circuit is kept stable, and slight load impact is effectively dealt with.

The invention discloses a device and a method for measuring dragging torque of an electronic mechanical brake caliper assembly, and belongs to the technical field of automobile brake system testing. The device comprises a first supporting seat, a driving rotating shaft, a brake disc and a driven rotating shaft assembly with a torque sensor, and precise positioning of a caliper support is achieved through cooperation of a rotating clamp and a guide pin. During testing, the calipers clamp the brake disc firstly to output clamping force and then release pressure, the motor drives the brake disc to rotate by a circle to eliminate inertia moment, and then the torque sensor dynamically collects dragging torque. A modularized brake disc fixing seat is adopted to adapt to products of different specifications, a coupler compensates for shafting offset, a fixing block locking mechanism guarantees non-measurement state safety, and inertia errors are eliminated in combination with a dynamic and static friction separation measurement method. According to the scheme, the problems of positioning deviation, mechanical interference and friction interference in a traditional test are solved, and the measurement precision and efficiency of the dragging torque of the brake calipers are remarkably improved.

The invention provides a sewing starting control method based on presser foot lifting feeding. The sewing starting control method comprises the following steps that an electric control unit, a presser foot rod, a presser foot and a presser foot lifting mechanism are arranged in a sewing machine; after the sewing material to be sewn is placed, the presser foot is put down, and the electric control unit receives a thick material sewing starting signal; before a feeding tooth sinks downwards into a needle plate during sewing of a first needle, an electric control unit controls a presser foot lifting driving source to act, the presser foot lifting driving source drives a presser foot rod and a presser foot to move upwards through a presser foot lifting transmission unit, the presser foot is lifted to the sewing target height, and the upwarp angle of the presser foot relative to the horizontal plane is reduced; at the moment, the presser foot is still pressed and attached to the sewing starting part of the to-be-sewn sewing material, and the horizontal component force of the pressure applied to the sewing starting part of the to-be-sewn sewing material by the presser foot is not larger than the maximum static friction force between the sewing starting part of the to-be-sewn sewing material and the sewing machine needle plate; in this way, after the feeding teeth sink downwards into the needle plate in the first stitch starting process, the undesirable phenomenon that the sewing starting part of the sewing material to be sewn is pushed away by the presser foot is avoided, and sewing starting material pushing is effectively avoided.

The invention relates to the technical field of silicon core pipe performance detection, in particular to HDPE silicon core pipe performance detection equipment which comprises a mounting bottom plate, vertical plates are fixed to the top of the mounting bottom plate in a bilateral symmetry mode, and horizontal sliding rails are mounted on the top of the mounting bottom plate and located on the right sides of the vertical plates in a front-back symmetry mode. The opposite sides of the two vertical plates are each provided with a clamping unit for clamping a silicon core pipe, the mounting bottom plate and the vertical plate on the right side are jointly provided with a pressing detection unit, and the two horizontal sliding rails are jointly connected with a friction detection unit through electric sliding blocks. The pressure resistance of the silicon core pipe can be detected through the pressure dynamic detection unit, and the dynamic and static friction coefficients of the silicon core pipe can be detected through the friction detection unit, so that three-sample data of the silicon core pipe can be rapidly and synchronously detected, the cost of various detection equipment is reduced, the detection efficiency can be improved, and the detection cost is reduced. And three detection steps are combined into one detection step.

The utility model relates to a clamp for accurate grinding of a right-angle measuring tool workpiece. The clamp comprises a base, a pressing plate and a top plate. The base is L-shaped, a plurality of vacuum chucks are embedded in the bottom surface of the positioning groove at intervals, and the bottom of each vacuum chuck is connected to a vacuum generator; two limiting tables are arranged on the base, supporting blocks are fixed to the tops of the two limiting tables respectively, the two ends of the top plate are fixed to the two supporting blocks respectively, guide rods arranged in the vertical direction are fixed between the two supporting blocks and the top plate respectively, the pressing plate is located between the base and the top plate, and the two ends of the pressing plate are slidably connected to the two guide rods in a sleeving mode respectively; and the top plate is connected with a pressing driver. The base is matched with the pressing plate, the right-angle measuring tool to be machined is pressed and positioned under the combined action of the L-shaped upper clamping face and the L-shaped lower clamping face, and clamping is reliable; a vertical pressure is provided through a vacuum negative pressure adsorption force mode, so that the horizontal plane static friction force of the right-angle measuring tool to be machined is improved, and a workpiece is stably clamped on the clamp.

The invention discloses an automatic measuring device and measuring method for dynamic and static friction torques of medium and large-sized bearings, and belongs to the technical field of bearing detection.The device comprises a bearing assembly, a moving plate is arranged on the bearing assembly, a rotating motor is connected to the bottom of the bearing assembly, and a driving shaft system is arranged on an output shaft of the rotating motor; the top end of the driving shaft system is provided with an inner ring fixing mandrel, the upper surface of the moving plate is connected with a torque sensor through an upper fixing frame, the bottom end of the torque sensor is provided with a measuring shaft system, the bottom end of the measuring shaft system is sleeved with a center adjusting assembly through two guide columns, the bottom of the center adjusting assembly is provided with an outer ring loading tool, and the outer ring loading tool is provided with an inner ring. Under the cooperation of the structure, not only can the dynamic friction torque be measured, but also the multi-point static friction torque can be automatically measured, more comprehensive bearing friction characteristic data are provided, and optimization of bearing design and model selection is facilitated.

The invention relates to the technical field of clamping tools, in particular to a clamping device for a cylindrical thin-wall precision component, which comprises a supporting unit, a bracket, a positioning unit, a positioning mechanism arranged in the bracket, a clamping unit and a clamping mechanism arranged on the positioning mechanism, the inflating mechanism is arranged on the clamping mechanism and is used for preventing the part from being clamped and deformed; balance of deformation prevention and stable clamping is achieved through flexible contact and self-adaptive air pressure adjustment, an elastic cushion and an air inflation bag cushion are arranged in the clamping mechanism, a self-adaptive adjusting structure is formed by matching with an air inflation mechanism, it is guaranteed that the static friction force is enough to prevent parts from sliding, and the clamping effect is good. According to the clamping device, the clamping force is reduced, sinking, ovality out-of-tolerance or inner wall plastic deformation caused by too large clamping force are avoided, the problems of deformation and the like of components in the machining and clamping process can be effectively avoided, the product rejection rate is further reduced, and the actual machining efficiency is further improved.

The application relates to the technical field of chip packaging, and discloses a power device packaging structure, which comprises an upper pressing plate assembly, a chip layer and a heat sink assembly, the chip layer is arranged between the upper pressing plate assembly and the heat sink assembly, the upper pressing plate assembly comprises a first connecting part, the heat sink assembly comprises a second connecting part, the first connecting part comprises a plurality of first insulating microwires, and the second connecting part comprises a plurality of second insulating microwires; the first insulating microwires and the second insulating microwires are connected through static friction, the static friction connection between the first insulating microwires and the second insulating microwires is not affected by temperature, and therefore the reliability of the power device packaging structure is improved.

The utility model discloses an efficient cleaning TBM (Tunnel Boring Machine) cutter head pneumatic unblocking device, which belongs to the field of unblocking devices and comprises a cutter head, a shield is fixedly connected onto the cutter head, an unblocking mechanism is movably mounted between the shield and the cutter head, and the unblocking mechanism comprises an air cylinder, a girder, a screw rod, a moving seat, a connecting block, an air cannon component, a pneumatic component, a sliding rod and a sliding block. Through the arranged blockage clearing mechanism, when the cutter head is blocked, an air cylinder pushes a girder outwards, a screw on the girder movably rotates, an air cannon assembly and a pneumatic assembly move in a reciprocating mode, a nozzle of the air cannon assembly sprays high-pressure gas to impact the cutter head, static friction force between rock soil and the cutter head is broken through, and the rock soil on the cutter head can conveniently fall down; and a pneumatic mode is used for replacing a high-pressure water gun for flushing, so that the waste of water resources is effectively reduced, and the problem that a water pipe is blocked by impurities due to a large amount of water is avoided.

The utility model discloses an uncoiling restraint system which comprises a working table, a groove is formed in the top of the working table, a self-adaptive supporting assembly is fixedly installed on the inner wall of the groove and comprises two rotating rollers, a driving assembly is fixedly installed on the top of the working table, and the driving assembly is fixedly installed on the inner wall of the groove. And the driving assembly comprises a first supporting seat and a second supporting seat, a lifting frame is installed on the inner wall of the first supporting seat, the inner wall of the second supporting seat is rotationally connected with a driving shaft through a bearing, and an uncoiling restraining assembly is installed at the top of the workbench. By adjusting the rotating platform and the uncoiling limiting frame to adaptively change along with the diameter change of the steel coil, the surface of the steel coil can be conveniently restrained in the whole process, the steel coil can be conveniently, rapidly and flatly uncoiled, and the situation that the surface of a steel plate is damaged under the static friction effect due to dust between the surface of the steel coil by a roller can be avoided; and the protection effect on the surface of the steel plate is improved.

The utility model discloses a guide vane sleeve combination bearing applied to a tubular turbine, which comprises a bearing seat, and a shaft sleeve groove penetrates through the middle of the bearing seat. According to the utility model, the bearing seat cast by stainless steel avoids the influence of welding stress, the sealing performance, the oxidation resistance and the corrosion resistance of the bearing seat are greatly improved, the service life of the bearing seat is greatly prolonged, and the shaft sleeve made of the high-strength modified polycaprolactam and molybdenum disulfide homogeneous high polymer material has good self-lubricating performance; the novel combined bearing has the advantages of no need of additional lubricant, close dynamic friction coefficient and static friction coefficient, no creeping phenomenon during working, low water absorption rate, excellent dimensional stability, no abrasion to a rotating shaft and no chemical corrosion problem, and compared with the original combined bearing assembly, the novel combined bearing is more reliable and simple in structural design, easy to maintain, low in water absorption rate, more stable in size, good in rigidity and high in reliability. The problems of welding deformation and corrosion of an existing guide vane sleeve and water absorption expansion and delamination of a combined bearing are solved.

A bicycle wheel assembly structure includes an annular rim, a hub, nipples, and spokes. The annular rim includes multiple rim penetration sections, each of which includes a rim-side limiting part on a circumference. The hub is arranged at the center of the annular rim. The hub includes multiple hub penetration sections. The rim-side limiting part and the nipple limiting part, and also the hub-side limiting part and the spoke limiting part, are all made in a hexagonal pyramid form with apex truncated to form a planar surface and including bevel facets so as to provide an anti-sliding effect resulting from geometric constraint and high static friction at both the annular rim-side and the hub-side. The angle of the hexagonal pyramid of the nipple limiting part is 60°, 90°, or 120°, and an optimum arrangement can be made based on the material elongation of the spokes and the desired tension.

The utility model discloses a photovoltaic cleaning robot and a photovoltaic power station, the photovoltaic cleaning robot comprises a cleaning robot body and an anti-sideslip assembly, the anti-sideslip assembly comprises a jacking mechanism and an anti-slip piece, the jacking mechanism comprises a fixed part fixedly connected with the cleaning robot body and a telescopic part arranged on the fixed part in the mode that the telescopic part does active telescopic motion along the preset axis, and the anti-skid piece is connected to the front end of the telescopic part in the mode that the anti-skid piece rotates around the preset axis. And the telescopic part can drive the anti-skid piece to be in surface contact fit with the photovoltaic module and apply preset pressure, or drive the anti-skid piece to be separated from the photovoltaic module. When the photovoltaic cleaning robot turns, the anti-sideslip capacity can be improved through the static friction force between the anti-slip piece and the photovoltaic assembly, and the operation reliability of the photovoltaic cleaning robot is improved.

The present invention addresses the problem of providing a film excellent in expandability (elongation percentage, uniform stretchability). The film satisfies (a) and (b). (a) The ratio E'(0) / E'(50) of the storage elastic modulus E'(0) at 0°C to the storage elastic modulus E'(50) at 50°C at an amplitude strain of 0.05% and 10 Hz is 5.0 or more. (b) The coefficient of static friction between surfaces of the film on at least one side is 0.5 or less.

The invention discloses a forging die for suspension clamp preparation, and relates to the technical field of suspension clamp forging dies, the forging die comprises an upper die, a lower die and a guide pillar guide limiting structure arranged between the upper die and the lower die; the upper die comprises an upper die base and a male die fixed below the upper die base. The lower mold comprises a lower mold base, a female mold and an ejection mechanism, the female mold is fixed on the lower mold base, a mold cavity of the female mold is matched with the male mold core, and the ejection mechanism is an automatic demolding mechanism with an energy storage impact function and comprises a lifting assembly, an ejection rod, a positioning assembly, a transmission assembly and an unlocking assembly. The problem that in the prior art, when a suspension clamp is forged, constant ejection force cannot overcome increased demolding resistance caused by product cooling shrinkage, static friction and vacuum adsorption jointly is solved. The energy storage impact type ejection mechanism has the advantages that instant mechanical impact can be automatically applied to damage vacuum adsorption and static friction force when a product is stuck in a mold, demolding is facilitated, and the like.

The invention discloses a shear-type piezoelectric acceleration sensor structure with adjustable sensitivity, and belongs to the technical field of piezoelectric acceleration sensors, the shear-type piezoelectric acceleration sensor structure comprises a base, the base is provided with a first platform surface and a second platform surface, and the first platform surface and the second platform surface are different in height. The high second platform surface is provided with a polarized piezoelectric element, the short first platform surface is provided with unpolarized piezoelectric elements, the tops of the unpolarized piezoelectric elements and the polarized piezoelectric elements are provided with mass blocks, the mass blocks are fixedly connected with the base through screws, and the mass blocks are used for generating inertia force after sensing measured acceleration. And the inertia force is transmitted to the polarized piezoelectric element and the unpolarized piezoelectric element in a static friction mode. Adjustment and distribution of static friction force can be achieved by adjusting the tightening force of the screw, so that sensitivity adjustment of the acceleration sensor is achieved, the adjustment process is convenient and fast, the acceleration sensor does not need to be disassembled, and breakage and scrapping of piezoelectric elements caused by structural disassembly are avoided.

The utility model provides a scraping strip assembly, which is used for a ground brush of a wet type surface cleaner, and comprises a main frame; the rolling piece is connected to the main frame and can freely rotate relative to the main frame; the scraping strip is pivotally connected to the main frame and can be pivotally rotated to a second position from a first position; the transmission part is pivotally connected to the scraping strip and is coaxially connected with the rolling part; the transmission part and the rolling part are connected through at least one static friction medium, so that static friction force is provided between the transmission part and the rolling part. The utility model further provides a floor brush and a wet type surface cleaner.

The utility model belongs to the technical field of road and bridge construction, and particularly relates to a road and bridge construction supporting structure which comprises a pier column, a hoop combination mechanism is arranged on the upper side of the pier column, and I-shaped beams are symmetrically arranged on the upper side of the hoop combination mechanism. The hoop combination mechanism comprises a first hoop, a second hoop, a first semicircular ring, a second semicircular ring, a reinforcing assembly, a fixing block, a connecting rod, a limiting rod, a nut and an inserting hole. The I-shaped beam is erected on the upper side of the first hoop, the first hoop provides direct support for capping beam construction, the second hoop supports the first hoop on the lower side through a reinforcing rod of the reinforcing assembly, the supporting stability of the first hoop is improved, meanwhile, the bolt is tightened, the bolt pushes the pressing block to tightly press the outer side face of the pier column, and the friction force between the pressing block and the outer side face of the pier column is increased. Therefore, static friction force between the whole hoop combination mechanism and the pier column is increased, and compared with a single hoop, the device is higher in error-tolerant rate and better in strength and stability of supporting cover beam construction.

The invention discloses safety tongs and an elevator car system, relates to the technical field of elevator braking equipment, and solves the problem that existing elevator safety tongs are difficult to reset under the action of static friction force. The clamp body is provided with a moving space for guide rails on the two sides of an elevator to penetrate through up and down; one side of the movable brake block is provided with a first brake surface which can be in frictional contact with guide rails on the two sides of the elevator; the side, close to the movable brake block, of the fixed brake block is provided with a second brake face capable of making friction contact with guide rails on the two sides of the elevator. A backing plate; the spring is located between the base plate and the clamp body and can apply pre-tightening force to the base plate. The safety tongs have the advantages of being simple in structure, easy to reset and the like, the fixed brake block and the movable brake block can synchronously move downwards so that unlocking can be automatically completed, through the structural design, the safety tongs are easier to unlock, and the safety tongs can automatically reset along with movement of a lift car without external force interference.

The present invention relates to the technical field of steel structure support, and discloses a steel structure support column of a building template, comprising a threaded support mechanism and a hydraulic wrapping mechanism. The steel structure support column of the building template utilizes the axial movement ability of the threaded structure when subjected to force to provide effective height support for the building template, and the support height is adjustable. In addition, the device utilizes the wrapping phenomenon generated by the airbag sheet after being subjected to force to provide a wrapping clamping effect on the rotating parts, converting the liquid pressure into the static friction force between the airbag sheet and the rotating parts, thereby preventing the occurrence of the component follower phenomenon caused by mechanical vibration, and further preventing the loosening phenomenon between the threaded structures due to vibration, so as to improve the anti-interference ability and working stability of the equipment.

An actuator assembly (1) comprising: a support structure (10) comprising a first friction surface (10f); a movable part (20) comprising a second friction surface (20f) engaging the first friction surface; one or more SMA wires (40) arranged, on contraction, to move the movable part relative to the support structure to any position within a range of movement; a biasing arrangement (30) arranged to bias the first and second friction surfaces against each other with a normal force, thereby generating a static frictional force that constrains the movement of the movable part relative to the support structure at any position within the range of movement when the one or more SMA wires are not contracted, wherein the one or more SMA wires are arranged such that the normal force between the first and second friction surfaces remains substantially constant on contraction of the one or more SMA wires.

To provide the hydraulic pressure actuating oil composition that has excellent wear resistance and sludge generation suppressing effect even when used under a high pressure condition, and has also excellent brake performance and clutch performance.SOLUTION: The hydraulic oil composition comprises a base oil (A), an antioxidant (B) containing an amine antioxidant (B1) and a phenolic antioxidant (B2), and a succinimide compound (C), wherein the hydraulic oil composition satisfies a following requirement (I) and is used for hydraulic equipment having an operating pressure of 30 MPa or more, and the hydraulic equipment has at least one of a wet brake and a wet clutch, and is selected from construction machines, general industrial machines, and generators. The requirement (I) is a coefficient of static friction (μs) after 1000 cycles of 0.100 to 0.162 which is measured according to a test of No. 2 of SAE described in JCMAS P.047: 2004.SELECTED DRAWING: None

The invention discloses a friction plate modeling method of a braking system and a related device, and relates to the technical field of vehicle dynamics, the first braking state of the braking system at the current moment is determined; and under the condition that the first braking state is the locked state, based on the assumption that the connection relation is the spring damping system, the first friction torque between the friction plate model and the wheel model is calculated, and the first friction torque is the first braking torque of the braking system in the locked state. When the wheel is locked, the static friction force of the friction plate is approximately equal to the rolling resistance of the wheel, and the friction plate and the wheel are not absolutely rigid, so that the friction plate slightly deforms under stress, and the static friction force of the friction plate fluctuates up and down under the resistance of the wheel but does not suddenly change; according to the application, during modeling, a spring damping system is used between the friction plate model and the wheel model to achieve a similar effect, so that the brake torque under a vehicle locking state can be accurately simulated, and great help can be provided for a brake control system algorithm simulation test.

According to the grain friction coefficient measuring device and the measuring method thereof, the sensor is used for judging grain falling, the inclination angle during static friction measurement is controlled through a sensor signal, the precision is high, measurement is carried out according to multiple grains falling for multiple times, the measuring efficiency is high, and the measuring precision is high. And the static and dynamic friction coefficients of the same sampling batch can be continuously measured. According to the measuring method, the average angle is calculated through weight of different falling angles and the number of multiple grains sampled at a time, and the method is closer to a static friction test of a comprehensive whole. Comprising a static friction measuring table used for measuring the static friction coefficient, and a disc collecting bin mechanism used for receiving materials falling from the static friction measuring table at different inclination angles; the single-grain discharging mechanism is used for receiving the materials output by the discharging holes and discharging the materials in a single-grain mode. And the dynamic friction coefficient measuring mechanism is used for receiving the material falling from the single grain discharging mechanism and measuring the dynamic friction coefficient of the grains.

The invention provides a return difference measuring method and device of a gear transmission mechanism in a motor driving system. According to the return difference measurement method, the return difference measurement value is indirectly determined by identifying the critical point that the gear transmission mechanism starts to respond to the driving signal, the critical point marks that the gear transmission mechanism completes the change from the idle stroke state to the effective transmission state, and the return difference measurement value is calculated based on the position data before the critical point. The return difference measurement value is a comprehensive index which contains the comprehensive influence of the gear backlash, the elastic deformation of the transmission shaft and the static friction force and reflects the overall transmission performance of the system, so that the return difference measurement value which reflects the overall transmission performance of the system and is real and comprehensive is obtained through measurement according to the technical scheme of the invention. According to the method, the transmission lag characteristic of the system under the actual working condition can be represented more accurately, and a more reliable data basis is provided for subsequent high-precision motion control.

The utility model relates to the technical field of centrifugal pumps, and discloses a vertical centrifugal pump medium-pressure mechanical seal which comprises a mechanical seal seat, a first limiting sleeve is installed at the upper end of the mechanical seal seat, a spring is installed between the mechanical seal seat and the first limiting sleeve, and a dynamic friction pair is movably connected into the upper end of the first limiting sleeve in a sleeved mode. And an O-shaped sealing ring is mounted between the first limiting sleeve and the dynamic friction pair. According to the medium-pressure mechanical seal of the vertical centrifugal pump, when the spring pushes the first limiting sleeve to move upwards, the first limiting sleeve and the dynamic friction pair can be controlled to be attached to keep tightness, meanwhile, the O-shaped sealing ring is controlled to be installed outside the output shaft, and the mechanical seal base, the first limiting sleeve and the dynamic friction pair synchronously rotate along with rotation of the output shaft; the sealing performance can be kept under the action of the O-shaped sealing ring, meanwhile, the static friction pair is installed on the limiting device, and the sealing sleeve seals the end of the output shaft, so that convenience is kept during installation, and the overall sealing performance of the pump body is improved.

A combined carpet is provided. The combined carpet includes an upper carpet body and a lower carpet body. The upper carpet body includes a first layer and a first attaching layer under the first layer; the lower carpet body is configured to be paved between the upper carpet and an object surface, and includes a second attaching layer and a second layer under the second attaching layer. An edge area of the first attaching layer extends beyond the second attaching layer to contact the object surface and does not overlap with the second attaching layer, a main area of the first attaching layer and the second attaching layer body realize a relative rest through a static friction force, to prevent relative movement when the upper and lower carpet bodies are connected, thereby forming a detachable combination between the upper carpet body and the lower carpet body.

The utility model relates to the field of semiconductors, and discloses a wafer bearing device and wafer detection equipment, and the wafer bearing device comprises a bearing seat, and a bearing area is provided with a limiting table; the supporting bracket comprises a friction contact surface protruding out of the bearing seat in the height direction of the bearing seat, and the friction contact surface is used for fixing the wafer through static friction force. In order to solve the problem that wafers made of some semiconductor materials cannot be adsorbed through static electricity, a supporting bracket is installed in a bearing area of a bearing seat, and the friction contact surface of the supporting bracket makes static friction contact with the wafers, so that the wafers are stabilized on the bearing seat through friction force, the requirement for bearing the wafers made of different semiconductor materials is met, the stability of the wafers is improved, and the service life of the wafers is prolonged. The wafer sliding probability is reduced, and the application range of the wafer bearing device is expanded; the wafer placed on the friction contact surface is limited through the limiting table, limiting protection after wafer sliding is achieved, and the safety of the wafer bearing device is improved.

The utility model discloses a continuous rigid frame bridge hanging basket walking limiting device, and belongs to the technical field of bridge construction. A continuous rigid frame bridge hanging basket walking limiting device comprises two rails which are fixed to the upper end of a bridge and are parallel to each other, the bottom of a hanging basket is in sliding fit with the two rails, a push plate capable of sliding in the length direction of the rails is arranged between the two rails, and a supporting plate is arranged on the push plate. A driving structure is arranged on the supporting plate to drive the push plate to slide in the length direction of the track and push the hanging basket to move; a pressing plate assembly is arranged at the upper end of the supporting plate and comprises two sliding frames capable of synchronously and reversely sliding, the sliding direction is perpendicular to the length direction of the rail, pressing plates are arranged on the sliding frames, the pressing plates can generate extrusion force on the hanging basket, walking of the hanging basket is limited through static friction force, and therefore it is guaranteed that after the hanging basket is pushed to the designated position, the hanging basket is pushed to the designated position. And the position stability is further ensured, so that construction is facilitated.

The invention discloses an electric cylinder friction force parameter and state simultaneous estimation method and device and a medium. Aiming at the stick-slip phenomenon and the oscillation phenomenon caused by friction force in low-speed movement, the friction force model of the servo electric cylinder is constructed by combining a traditional static friction force model and a dynamic LuGre friction force model. And on the basis, according to a moment balance equation, a dynamic model of the servo electric cylinder is established. A motion state predictor of the servo electric cylinder is designed by means of a kinetic model and a friction force model of the servo electric cylinder. And updating a friction force state estimation error by using the motion state prediction error, designing a friction force state observer, and estimating the friction force state. In combination with the estimation of the friction force state, the self-adaptive law of the friction force model parameters is constructed, and the friction force model parameters are estimated online, so that the precise estimation of the friction force borne by the servo electric cylinder is realized, and the precise compensation effect of the servo electric cylinder system on the friction force is realized.