84results about How to "Across convenience" patented technology

The invention discloses a multi-rotor aircraft for patrolling a power line; the multi-rotor aircraft can fly and is mounted on a power line so as to be used for patrolling the power line. The multi-rotor aircraft is provided with a mounted pulley, a mounting guide plate and a mounting bracket, wherein the mounted pulley is in contact with the power line, so that the multi-rotor aircraft is mounted on the power line; the mounted guide plate is used for guiding the multi-rotor aircraft to move towards the power line so as to complete mounting when the multi-rotor aircraft is to be mounted on the power line; the mounted bracket is used for supporting the mounted pulley and the mounting guide plate. The multi-rotor aircraft for patrolling the power line can be used for safely and reliably patrolling the power line within a large patrolling range with high accuracy.

The invention relates to a long-distance dense-phase conveying system provided with an assistant blowing device and a method thereof. The conveying system comprises an air control apparatus formed by an air compressor, an air storage tank and a system control apparatus; a material storage bin and an on-line sub-bin which are formed by a material tank, a bin controller and a solid-air separator; a sending tank; a fluidization conveyor formed by a streamline casing, a guiding clapboard and an air inlet; a tube liner provided with air inlets arranged by an outer conveying pipe according to subsections and a dense-phase conveying pipeline formed by the assistant blowing device . The tube liner is fixedly connected with the inner upper wall of the outer conveying pipe; the assistant blowing device is fixedly connected and communicated with the outer pipe and tube liner. The dense-phase conveying method comprising the following steps: materials enters the sending tank from the material storage bin and then enters the dense-phase conveying pipeline through the fluidization conveyor and under the effect of compressed air to form a series of material plugs flowing in the conveying pipeline and finally the material reaches the sub-bin for processing and manufacturing. The invention has the advantages that the energy cost is low; the damage to material during the conveying process is less; the wearing to pipeline can be reduced; and the service life is long.

Provided is a robot used for automatically deicing a high tension transmission line. A support is provided with three sets of rotary mechanisms making the members arranged on the support rotate for a certain angle in a manner of a Chinese character pin. The middle rotary mechanism is located at one side of the support and is provided with an auxiliary hang mechanism which can be hung to the high tension power line. The rotary mechanisms on both ends are located on the other side of the support and are provided with elevating systems which can make the members provided on the rotary mechanismselevate. The elevating systems are provided with a deicing mechanism and a running gear driving the robot to walk on the high tension power line. According to the structure provided in the invention,the robot can stably creep on the overhead high tension power line at a preset speed, the auxiliary hang mechanism and running gear arranged in the manner of the Chinese character pin prevent the robot from falling in scurvy weathers, and the cooperation of the rotary mechanisms and elevating systems can help the robot conveniently step over the barriers such as stockbridge dampers, wire clamps, insulators and the like on the high tension power line.

The invention discloses a rapid paying-off device applied to a distribution network of a grain-producing area. The rapid paying-off device comprises a machine frame, a first support, a second support,a third support, a straight line channel, a cable tray, a tensioning wheel, a guide wire pressing wheel and a lifting platform, wherein the first support, the second support, the third support and the straight line channel are sequentially arranged on the machine frame, the cable tray is rotationally mounted on the first support, the tensioning wheel is rotationally mounted on the second support,the guide wire pressing wheel is rotationally connected to the third support, and the lifting platform is arranged below the machine frame. The rapid paying-off device has the characteristics of being simple in structure, convenient to operate and reliable; universal wheels are arranged, so that the device can be moved conveniently and flexibly, the cable paying-off device can be widely applied to power cable laying construction, cable paying-off construction is greatly facilitated, the construction efficiency is improved, and the labor intensity of constructors is reduced; a side portion universal wheel is arranged, can stretch according to the bump of a rugged road and corresponds to the height of the guide wire pressing wheel, so that a high-altitude uneven grain field can be conveniently crossed; and the ground clearance between the platform bottom and the ground can be adjusted, and a ground clearance can be heightened for crops with higher plants, so that damage to grain plantsis reduced.

The invention discloses a full-duplex free space wireless optical communication terminal machine. The full-duplex free space wireless optical communication terminal machine comprises an emission system and a receiving system. The emission system comprises a single-chip microcomputer system, a driving and modulator circuit and an illumination module, wherein the driving and modulator circuit comprises a temperature control circuit (ATC), a current control circuit (ACC), a power control circuit (APC), a protective circuit, an alarming circuit and a parameter acquisition controller. The receiving system comprises a single-chip microcomputer system, a detection and demodulation circuit and a receiving module. The wireless optical communication terminal machine is mainly applied to secure communication between an outdoor movable medium-long-distance wireless optical communication (0.1-20 km) and a naval ship.

Provided is a walking mechanism of a sampling robot. The walking mechanism of the sampling robot comprises an object placement platform balancing unit and a moving unit, wherein the object placement platform balancing unit comprises an object placement platform, connecting rod mechanisms, a lead screw and a lead screw motor, the moving unit comprises two front wheels, two middle wheels, two rear wheels, a rack and a revolute pair, the front wheels are symmetrically distributed on the left side and the right side of the position below the object placement platform, the middle wheels are symmetrically distributed on the left side and the right side of the position below the object placement platform, the rear wheels are symmetrically distributed on the left side and the right side of the position below the object placement platform, the rear wheels and the rack are connected through the revolute pair, the front wheels are arranged on the front end portion of the rack, the middle wheels are arranged on the rear end portion of the rack, the rear wheels are hinged to the rack through the revolute pair, the object placement platform is connected with the moving unit through the connecting rod mechanisms, the position of hinge joint between a first connecting rod and a second connecting rod of each connecting rod mechanism is hinged to the rack of the moving unit, and the position of hinge joint between a third connecting rod and a fourth connecting rod of each connecting rod mechanism is hinged to a rear wheel supporting rod of the moving unit. The walking mechanism of the sampling robot has the advantages that due to the fact that the object placement platform balancing unit and the moving unit are combined together, climbing performance, ditch crossing performance, boss crossing performance and steering performance of the whole walking mechanism are ensured, a motor is used by the middle wheels, a motor is used by the rear wheels, differentials are used for distributing power for the middle wheels and the rear wheels respectively, and steering stability of the sampling robot is improved.

The invention discloses a quadruped robot based on a four-bar mechanism. The quadruped robot comprises a base and legs, wherein every two of the four legs are symmetrically arranged on two sides of the front end and two sides of the rear end of the base; the legs each comprise a pedestal, a four-bar mechanism, a motor B, a cross bar, a coupling, a vertical bar and a scissors fork telescopic frame;the four-bar mechanism is a planar pivot four-bar mechanism and comprises a crank, a rocker bar and connecting rods; the front ends of the crank and the rocker bar are respectively hinged onto the pedestal; the rear end of the crank is hinged with the front end of the hinged connecting rods; the rear end of the rocker bar is hinged with the middle of the connecting rods; the motor B drives the crank to rotate around the hinged joint at the front end of the crank; the scissors fork telescopic frame is provided with multiple hinge joints from the upper end to the lower end; the scissors fork telescopic frame is connected with the coupling at the hinged joint at the uppermost end, and connected with the lower end of the vertical bar by virtue of any hinged joint except the hinged joint at the lowest end. The quadruped robot based on the four-bar mechanism disclosed by the invention has the advantages that the legs of the quadruped robot are driven by the four-bar mechanism, the travelingfunction can be realized by virtue of drive of one motor only, the manufacturing cost is low, and the electric control design difficulty is low.

The invention discloses a novel cane harvester. A traveling mechanism is arranged under the chassis, a feeding and conveying mechanism is aslant arranged on the chassis, a discharge hopper is gradually inclined upwards from inside to outside, the top portions of the left and right sides of the inner side end of the discharge hopper are respectively fastened with the rear side of the feeding and conveying mechanism, the waist portion of each of the left and right sides of the inner side end of the discharge hopper is supported by an angle adjusting cylinder which can adjust the inclination angle of the discharge hopper, a header is arranged at the front end of the feeding and conveying mechanism for cutting off cane stems and feeding into a conveying channel, the cane stems are peeled in the conveying channel, the cane stems are finally conveyed into the discharge hopper for performing windrowing, bundling and docking processes, a hydraulic system is arranged above the feeding and conveying mechanism, and a covering part assembly is also arranged above the feeding and conveying mechanism. The novel cane harvest has the characteristics of being compact in structure, flexible to operate, reliable in work, light and durable, low in cost and high in work efficiency.

The invention discloses a vibratory leveling device, and relates to the technical field of concrete construction equipment. The vibratory leveling device comprises a main beam, a vibrating beam and walking mechanisms, wherein vibrators are arranged on the vibrating beam; the main beam is parallel to the vibrating beam, and is further connected with the vibrating beam through a guiding mechanism; vibrating beam height regulating mechanisms are arranged at two ends of the main beam; the walking mechanisms are arranged at two ends of the maim beam; roller wheels at the lower ends of the walking mechanisms cooperate with an orbital groove; the orbital groove is connected with a longitudinal template through a supporting regulating mechanism. A vibratory leveling operation is carried out by utilizing the vibrators on the vibrating beam; the vibrating beam height regulating mechanisms at the two ends of the main beam can regulate the height of the vibrating beam, thereby being convenient for crossing an obstacle; the roller wheels at the lower ends of the walking mechanisms at the two ends cooperate with the orbital groove; the orbital groove can be connected with the longitudinal template through the supporting regulating mechanism; heights and levelness degrees of the orbital groove and a vibrating device are regulated by means of the supporting regulating mechanism; the orbital groove and the supporting regulating mechanism are convenient to disassemble without influencing the recycling of the longitudinal template; the universality is improved; the material consumption is reduced.

The invention provides an all-solid-state battery cell, a preparation method thereof and a solid-state battery. The preparation method comprises the following steps: 1) attaching a negative plate to an electrolyte membrane, and carrying out isostatic pressing treatment to obtain a first semi-finished battery cell; 2) attaching a positive plate to the electrolyte membrane of the first semi-finishedbattery cell, and carrying out isostatic pressing treatment to obtain the all-solid-state battery cell. According to the preparation method provided by the invention, isostatic pressing treatment iscarried out step by step, so the requirement on the mechanical strength of the sulfide electrolyte membrane is very low, a thinner electrolyte membrane can be used, the electrolyte dosage and the lithium ion transfer path length in the battery working process are greatly reduced, and the impedance is reduced; the requirements on the bonding strength and the type limitation range of the binder arereduced, so the reduction of the cost of the battery cell is facilitated, and the crossing of the all-solid-state battery from the mold battery to the soft package battery cell is realized.

An embodiment of the invention discloses a tire applied to a cleaning robot and the cleaning robot to improve the obstacle crossing ability and durability of the tire. The tire in the embodiment comprises a first tread and a second tread which are arranged around the rotating axis of the tire, wherein the first tread and the second tread are formed by alternate arrangement of bulge structures andgroove structures respectively; in the direction parallel with the rotating axis of the tire, the bulge structures of the first tread and the groove structures of the second tread are adjacent, and the groove structures of the first tread and the bulge structures of the second tread are adjacent. Therefore, as the bulge structures are not prone to wearing, the durability of the tire is improved. Scrubbing between groove walls of the groove structures and obstacles can increase friction, so that the tire can cross obstacles easily.

A method and apparatus for demounting tires from wheel assemblies with a swiveling dual hook assembly and a prying foot. The tool has two holding hooks that grasp the tool to the wheel and a foot that is attached to the holding hooks, and a bearing pivot point that allows the demounting tool to easily and safely remove the tire from the wheel with no damage to the wheel or tire. The tool can be used for all types of tire and wheel types. One tool is for large truck and trailer tires and a second too is for light truck, trailer and automobile tires. A third tool is designed for low profile, stiff sidewall tires and includes a telescoping structure to raise and lower the dual hooks.

The invention discloses a multi-functional cable towing vehicle, the actuator comprise a support device, A telescopic frame, a walking device and a clamping device are characterize in that that telescopic frame comprises a fixing plate and a movable plate, wherein the fixing plate and the movable plate are connected with each other through the telescopic device, a rotating disk is connected with the fixing plate through a rotating shaft, and the clamping device comprises a square frame, an arc block, a bolt and two support columns. The cable conveyor can be installed on the invention, and thecable can be directly clamped on the invention. The distance between the movable plate and the fixed plate is adjusted by the function of the telescopic frame to adapt to the different width of the gully topography; The cable conveyor is installed on the rotating disk above the fixed plate, and is no longer restricted by the single traction direction of the cable conveyor through the rotating action of the rotating disk, and the angle can be adjusted freely; The traveling device can make up for the inconvenience of the cable traction machinery in the moving process at this stage.

The invention relates to an intelligent follow-up luggage carrier group. The group comprises a leading luggage case and a follow-up luggage case. The follow-up luggage case comprises a case body. Driving wheels are arranged at the bottom of the case body. Rotation shafts are connected with the output shaft of a motor at the inner bottom of the case body. The motor is connected with a controller through a driving module. The controller is connected with a distance detection device arranged on the front face of the case body. The distance detection device is used for detecting the distance between the follow-up luggage case and the leading luggage case. The controller controls the driving module to drive the motor according to the distance detected by the distance detection device, thereby achieving action control of turning and straightly walking during differential speed walking of the driving wheels to allow the follow-up luggage case to walk along with the leading luggage case. According to the invention, the luggage case is allowed to move forward along with the front luggage case.

The invention discloses a vehicle-mounted type pruning device for a highway central green belt and belongs to the field of road maintenance. The vehicle-mounted type pruning device for the highway central green belt comprises a right-angle bearing frame, a hydraulic cylinder, a fixed hydraulic sleeve, movable right-angle frames, a top pruning assembly, side edge pruning assemblies, height adjustment assemblies and rolling wheels, wherein the top and side edge pruning assemblies are arranged to be composed of two rotatable electric saws, and two ends of each assembly are fixed on a width adjustment device and a height adjustment device through a rotary shaft, so that the pruning assemblies are adjusted through adjusting the movable right-angle frames and the height adjustment assemblies; the vehicle-mounted type pruning device for the highway central green belt is simple in structure and mostly adopts a mechanical structure, so that the fault rate is low; the space is saved and the device is convenient to move and operate.

The invention discloses an efficient adaptive robot for mountain forest. The efficient adaptive robot comprises a mounting plate, a two-way electric push rod is fixedly mounted in the middle of the bottom face of the mounting plate, T-shaped frames are fixedly mounted at the two ends of the two-way electric push rod, connecting plates are welded to the two ends of each T-shaped frame, and clamping wheels are movably mounted at one ends of the connecting plates; and the outer sides of the two clamping wheels are connected through a crawler belt, a rotating shaft is movably installed in one end of the driving shaft, and a pushing column is installed at one end of the rotating shaft through a screw.Compared with the prior art, the robot disclosed by the invention has the beneficial effects that the two-way electric push rod, the T-shaped frame, the clamping wheels, the crawler belt and the circular wheels are used, round wheels can be used on a smooth zone and a road surface, moving operation of the robot is facilitated, the moving speed of the robot on the smooth zone and the road surface is increased, damage to the road surface during walking of a crawler belt is avoided, the crawler belt is used on an uphill zone and an unsmooth zone, the road holding force of the robot is increased, and the robot can conveniently uphill and walk.

A method and apparatus for demounting tires from wheel assemblies with a hook assembly and a prying foot. One tool has two holding hooks that grasp the tool to the wheel and a foot that is attached to the holding hooks, and a bearing pivot point that allows the demounting tool to easily and safely remove the tire from the wheel. The tool can be used for all types of tire and wheel types. One tool is for large truck and trailer tires and a second too is for light truck, trailer and automobile tires. A third tool is designed for low profile, stiff sidewall tires and includes a telescoping structure to raise and lower the dual hooks. A forth embodiment is for demounting a first and second bead using a fixed pivot hook, sized prying feet and a telescoping assembly for pulling the bead from the wheel assembly.

A method and apparatus for demounting tires from wheel assemblies with a hook assembly and a prying foot. One tool has two holding hooks that grasp the tool to the wheel and a foot that is attached to the holding hooks, and a bearing pivot point that allows the demounting tool to easily and safely remove the tire from the wheel. The tool can be used for all types of tire and wheel types. One tool is for large truck and trailer tires and a second too is for light truck, trailer and automobile tires. A third tool is designed for low profile, stiff sidewall tires and includes a telescoping structure to raise and lower the dual hooks. A forth embodiment is for demounting a first and second bead using a fixed pivot hook, sized prying feet and a telescoping assembly for pulling the bead from the wheel assembly.

The invention discloses a movable type monitoring camera which comprises a hanging rail, wherein the hanging rail can be arranged into a frame to be arranged around a wall body; a guide rail is fixedly arranged on the outer side of the hanging rail; a top rack is fixedly arranged on the upper end face of the hanging rail; two slipping devices connected with the top rack and the guide rail in a matching manner to realize slippage are arranged on the outer side of the hanging rail; and if the hanging rail comprises two right-angle sides, the slipping devices are arranged on the two right-angle sides of the hanging rail separately. Equipment moves on the outer side of the hanging rail to increase the detecting area of the monitoring camera, and the dead angle area of the monitoring camera isreduced to the minimum, so that a staff can conveniently monitor the area, and the situation that multiple monitoring cameras are arranged to increase the cost and the observation trouble of the staffis avoided.

The invention relates to the technical field of mowers, in particular to an agricultural mower which comprises a cutting shell, wherein a fuel generator is fixedly mounted at the top of the cutting shell, a mowing mechanism is mounted at the position, close to the end, of the bottom face of the cutting shell, and one side of the cutting shell fixedly communicates with a collecting shell. According to the technical scheme, the distance between a connecting shaft below an adjusting plate and the cutting shell and the distance between the connecting shaft below the adjusting plate and the collecting shell are increased, so that the overall gravity center of the mower is improved, the bottom face of the mower cannot make contact with a ridge in the climbing process of the mower, especially when the mower climbs over the highest point, therefore, collision between the mower and the ridge when the mower climbs over the ridge is avoided, and the completeness of the ridge is maintained.

This invention belongs to pharmaceutical dosage form and preparation technique field, it relates to improve or advance the method of angleworm kinase oral administration absorbing being availability. Its features lie in that angleworm kinase concentration in vivo blood plasma can be effective improved or advanced when angleworm kinase is used with absorption enhancer or / and enzyme inhibitor, so angleworm kinase curative effect can be advanced. The features of this invention is that angleworm kinase is used with absorption enhancer or / and enzyme inhibitor to achieve the goal of improve angleworm kinase oral administration absorption capacity.

The invention discloses an electric welding device for building construction. The electric welding device for building construction comprises a movable seat and an electric welding machine; motor boxes are mounted at the centers of the two sides of the center line of the top of the movable seat; a light filtering glass cover is mounted in the positions, located at the middle parts of the other twomotor boxes, at the top of the movable seat; a cross rod is arranged in the position, located below each motor box, at the bottom of the movable seat; lifting mechanisms for driving the cross rods toascend and descend are arranged in the motor boxes; telescopic rods are welded to the tops of the two ends and the middle parts of each cross rod; the telescopic rods at the two ends are connected tothe interior of a second sleeve column in a sleeved mode; the telescopic rod at the middle part is connected to the interior of a first sleeve column in a sleeved mode; and damping structures are arranged between the telescopic rods and the first sleeve column and between the telescopic rods and the second sleeve column. According to the electric welding device for building construction, the movable seat can cross obstacles conveniently, use is more convenient, the multi-buffering and damping effects are good, the service life of the electric welding machine is prolonged, an electric weldingworkbench does not need to be additionally arranged, reinforcing steel bars do not need to be additionally fixed, time and labor are saved, and eyes of welding workers are protected.

The invention discloses an automatic inspection robot for photovoltaic power station power transmission line inspection, and relates to the technical field of photovoltaic power station power transmission line inspection. The automatic inspection robot for photovoltaic power station power transmission line inspection comprises a supporting plate, and two sets of lining plates are fixedly installed at the top of the supporting plate. According to the automatic inspection robot for inspecting the power transmission line of the photovoltaic power station, the angle of a solar panel can be adjusted, the solar panel can better absorb electric energy conveniently, then the service life of the inspection robot can be prolonged, the problem that the inspection operation is not meticulous enough due to the fact that the service life is short is solved, the inspection quality is relatively improved, the distance between a buffer wheel and a walking wheel can be adjusted, so that crossing is facilitated when the inspection robot encounters a warning ball during inspection on the power transmission line, the problem that the inspection robot cannot walk due to the warning ball of the power transmission line is solved, and the use error-tolerant rate and practicability of the inspection robot are relatively improved.

The invention discloses a bridge bottom surface crack width measurement device, which comprises a small moving platform. The upper surface of the small moving platform is provided with a lifting platform; the upper surface of the lifting platform is fixedly connected with a take-up roller; the upper surface of the lifting platform is fixedly connected with a first main arm; and the side surface ofthe first main arm is fixedly connected with a first fixing block. According to the bridge bottom surface crack width measurement device disclosed in the invention, through arranging a servo motor, arotating horizontal baffle, an electric telescopic rod, an electromagnetic ring and an electromagnetic block, connection between the rotating horizontal baffle and a second fixing block is more stable when the rotating horizontal baffle is rotated inside the second fixing block; and through arranging two first fixing blocks and a distance sensing device, the device can transfer a force point, crossing a vertical guard bar on the upper surface of the bridge is facilitated, and the bridge bottom surface crack width measurement device disclosed in the invention has the effect of flexible guard bar crossing detection.

The invention discloses a walkable guide rail system applied to building curtain wall detection and monitoring; the system comprises an adsorption support device vertically adsorbed on a building curtain wall, horizontal rails arranged at the upper end and the lower end of the building curtain wall, installed on the adsorption support device and suspended from the building curtain wall, a verticalrail arranged between the two horizontal rails and arranged in the vertical direction of the building curtain wall in a suspended mode; and a rail moving device connected with the horizontal rails and the vertical rail and driving the vertical rail to walk on the horizontal rails. According to the guide rail system provided by the invention, the horizontal rails and the vertical rail are suspended on the building curtain wall through the adsorption support device, and the wall-climbing robot can walk on the guide rail system at a certain distance from the building curtain wall, so that the wall-climbing robot can conveniently cross a frame obstacle of the building curtain wall to perform detection and monitoring work; meanwhile, the wall-climbing robot can move up and down and left and right on the building curtain wall, and the purpose of full-coverage inspection, detection and / or monitoring of the building curtain wall in a certain area is achieved.

The invention discloses a straddle-type movable-butting track beam. The straddle-type movable-butting track beam comprises a first track beam, a second track beam, a driving device and a rotating device, wherein the first track beam and the second track beam are respectively arranged on two sides of a road; the driving device is separately used for driving the first track beam and the second track beam to swing by using the separate pivot ends as rotation centers; and the movable ends, which are respectively arranged on two sides of the road, of the first track beam and the second track beam are butted under the driving of the driving device to form an operating line across the road. According to the straddle-type movable-butting track beam disclosed by the invention, when no train passes, the two track beams are respectively located on one side of the road without influencing traffic; and when a train passes, the entire track beams can switch the train to another track under the action of the driving device, so that the two track beams are butted and the traffic lines on two sides of the road are connected.

The invention relates to an automatically walking cleaning system, belonging to the technical field of intelligent cleaning equipment. The automatically walking cleaning system comprises a cleaning robot and a base station for providing supply to the cleaning robot, wherein the base station is provided with an inclined guide plate; universal wheels, driving wheels and a mopping and wiping assembly are arranged at the bottom of a robot body of the cleaning robot; the universal wheels and the mopping and wiping assembly are oppositely arranged at the two ends of the bottom of the robot body; the driving wheels are arranged on the two sides of the robot body; the cleaning robot is provided with a balance weight part which is arranged at one end deviated to the universal wheel relative to center of robot body; and when the mopping and wiping assembly enters the base station through the inclined guide plate in a direction facing the base station, a distance between the gravity center of the cleaning robot and the center of the robot body in a horizontal direction is within a preset range. According to the invention, the distance between the gravity center of the cleaning robot and the center of the robot body in the horizontal direction is within the preset range, the gravity center of the cleaning robot is close to the driving wheels as much as possible, the driving wheels abut against the inclined guide plate with enough abutting force, and thus, the phenomena of slipping, slope sliding and the like of the driving wheels are reduced.

The invention relates to a 3-RPS-based self-leveling foldable arm elevator. The 3-RPS-based self-leveling foldable arm elevator comprises a self-leveling device, a truck and a foldable arm elevator body, and is characterized in that the self-leveling device is mounted between a foldable arm and the truck, and three leveling support legs are uniformly arranged at 120 degrees on a movable platform and a static platform; an oil cylinder is hinged to the static platform, a bearing base d is in bolted connection with the oil cylinder, bearing bases are used in pairs, a support a is mounted on a through hole a, a bulged circular ring on the support a props against the movable platform, and a bearing base b is mounted on a through hole b; one end of a rod a and one end of a rod b are respectively in clearance fit with bearings mounted in the bearing bases, and the other end of the rod a and the other end of the rod b are hinged through a shaft. The elevator designed on the basis of 3-RPS solves the problem that a conventional elevator cannot work on a sloped or rugged pavement. In combination with many advantages of the foldable arm elevator, the designed elevator is stable in structure and easy to store, the working range of the elevator is expanded and the working efficiency is improved.