83results about How to "Achieve vertical lift" patented technology

The invention provides a multifunctional six-legged climbing robot. The multifunctional six-legged climbing robot comprises a transmission module, a flying claw module, a grabbing module, a leg module and a shell module. The leg module comprises six legs which are distributed on the left side and the right side of the shell module. The transmission module comprises an orthogonal grooved wheel mechanism and gears, wherein the gears are driven by the orthogonal grooved wheel mechanism in a time division mode and located on the left side and the right side of the orthogonal grooved wheel mechanism. The legs are driven to swing through multi-stage transmission. The climbing function of the robot is realized through the transmission module and the leg module in a unified mode; the object picking function of the robot is realized through the grabbing module; the climbing assisting function of the robot is realized through the flying claw module; by means of the design of the orthogonal grooved wheel transmission mechanism, time-division transmission of the six legs divided into two groups can be achieved just through one control motor; control is simple, the mechanical structure is a major part, and the reliability is high.

The invention discloses a vertical elevating device with a deadweight balancing capability. The vertical elevating device is characterized in that a parallelogram transmission mechanism is arranged; a first rocking lever and a second rocking lever are articulated on top frames on both sides respectively; the first rocking lever is connected with the second rocking lever through a pull rod; the outer side rod ends of the first rocking lever and the second rocking lever are provided with a first slide block and a second slide block which are positioned at the same height; the first slide block and the second slide block are connected with a horizontal elevating framework through a sliding pair; and meanwhile, a crank rocker mechanism serving as a driving mechanism, a vertical elevating forked mechanism and a deadweight stabilizing unit constructed by a hydraulic cylinder are arranged. Through coupled movement of each mechanism, horizontal and vertical elevation for carried objects is realized; and the vertical elevating device is simple in structure, and has a high loading capability.

The invention relates to a lifting-type ship cabin conveyor. The lifting-type ship cabin conveyor comprises a rack, and is characterized by also comprising a peripheral framework, a drive shaft, two front fixed pulleys, two back fixed pulleys, a front rope and a back rope, wherein the rack is penetrated into the peripheral framework and can slide up and down; the drive shaft is arranged on the outer side of the peripheral framework and can rotate around the axial direction of the drive shaft; a front winding wheel and a back winding wheel are fixed to the drive shaft; the two front fixed pulleys and the two back fixed pulleys are respectively on the two corners on the front side and the back side at the bottom of the rack; one end of the front rope is fixed to the peripheral framework; the other end of the front rope passes through the two front fixed pulleys in turn and is finally wound on the front winding wheel; one end of the back rope is fixed to the peripheral framework; and other end of the back rope passes through the two back fixed pulleys in turn and is finally wound on the back winding wheel. By rotating the drive shaft, the vertical lifting of the rack relative to the peripheral framework is realized; space is formed between the rack and the bottom surface of a ship cabin; a box body can be arranged below the rack; and after the box body below the rack is conveyed,the rack can be dropped so that the rack stands at the bottom of the ship cabin.

The invention relates to an electric nursing bed which can be driven in an electric manner and vertically lift the nursing bed surface as a whole and a lifting method, the electric nursing bed comprises a base, two sets of supporting bent frames are respectively hinged with connecting lugs at two ends of the base and can rotate around a pin shaft, two ends of a motor supporting frame are respectively hinged with the connecting lugs on the supporting bent frames, the motor supporting frame can rotate, the electric nursing bed comprises four transmission connecting rods, one end of each transmission connecting rod is respectively hinged with a cross beam of the base through the connecting lug, the other end of each is respectively hinged with the connecting lug in the supporting bent frame, and a motor is used for driving the motor supporting frame to lift through a power transfer connecting rod hinged with the motor supporting frame. The electric nursing bed has the following advantages: 1) the structural design is novel, special and simple, only one thrust motor is needed, and the electric nursing bed can not only realize vertical lifting of the bed surface as the whole, but also realize smooth lifting; and 2) the cost is low and the application range is wide.

The invention discloses a bilateral container loader, and aims to provide a loader with a self-walking function, which can meet transport requirement after being furled, and can operate ground-to-ground and vehicle to vehicle loading and unloading operation. The loader comprises an engine, a frame, two hoisting systems with the same structure respectively installed on two ends of the frame, a self-walking system, a rear axle and a suspension system. The hoisting system consists of a suspension arm device and a landing leg device, the suspension arm device comprises a guide pillar and a T-shaped lifting arm connected with a lifting driving system, two sides of the horizontal part of the T-shaped lifting arm are respectively hinged with a folding type horizontal arm stretching mechanism, and the landing leg device comprises two supporting units each of which comprises a fixed support seat, a horizontal expansion support seat, a swing leg, a connecting bar, a swing driving mechanism and a horizontal expansion driving mechanism. The self-walking system comprises two wheels, a support shaft for connecting the two wheels, a support, an overturning hydraulic cylinder, a steering hydraulic cylinder, a square steering shaft and a self-walking driving mechanism.

The invention discloses a vertical lifting device which is characterized by being provided with a parallelogrammic transmission mechanism, a crank rocker mechanism which serves as a driving mechanism, and a vertical lifting fork-shaped mechanism. The parallelogrammic transmission mechanism is characterized in that a first rocker and a second rocker are respectively hinged on top frames on both sides; the first rocker and the second rocker are connected by a tension rod; the outer side rod ends of the first rocker and the second rocker are respectively provided with a first slider and a second slider on the same height; and the first slider and the second slider are connected with a horizontal lifting framework through a sliding pair. According to the vertical lifting device, the horizontal and vertical lifting of a carried object is realized through the coupling motion of all the mechanisms, and the equipment has a simple structure and high controllability.

The invention discloses a leveling head which comprises a telescopic beam, a rotary connector, a leveling head transverse beam, a spiral stirring distributing tank and a screeding plate. The telescopic beam, the rotary connector, the leveling head transverse beam, the spiral stirring distributing tank and the screeding plate are sequentially arranged from top to bottom, the rotary connector is arranged below the front end of the telescopic beam, the leveling head transverse beam is horizontally fixedly connected to the lower end of the rotary connector, and the middle of the leveling head transverse beam is fixedly connected with the lower end of the rotary connector; double outlet-rod cylinders are respectively vertically fixedly arranged at two ends of the leveling head transverse beam; the tops of lower piston rods of the double outlet-rod cylinders are movably hinged to the top of the spiral stirring distributing tank; screeding plate lifting cylinders are respectively arranged on two sides of the centers of the side walls of the spiral stirring distributing tank, and piston rods of the screeding plate lifting cylinders downwardly extend; guide plates are respectively arranged on the side walls of the spiral stirring distributing tank, vertical guide grooves are formed in the guide plates, connecting frames are vertically slidably clamped on the guide grooves, the upper ends of the connecting frames are movably hinged to the tops of the piston rods of the screeding plate lifting cylinders, and the bottoms of the connecting frames are fixedly connected with the screeding plate.

The invention relates to a lift for outdoor substation bus operation. The life for the outdoor substation bus operation comprises a base, a steel frame, a lifter and a glider, wherein the steel frame is fixed on the base, and the lifter and the glider are arranged on the steel frame. The lift for the outdoor substation bus operation is characterized in that the middle and rear potion of the base stretches across the groove steel frame; the lifter is disposed on both sides of a lower end surface of a crossbeam of the steel frame; a crank of the lifter passes through the crossbeam and exposes on an upper end surface of crossbeam; wheels are arranged on both ends of the base; steel cables of the lifter first bypass the wheels downwards and then pass through the crossbeam of the steel frame, and the top end of the steel cables are connected with a hook; the glider is arranged in the middle of the crossbeam; a drive mechanism provided with a pair of a worm wheel and a worm shaft which are engaged with each other is installed inside the lifter; a rotation shaft of the worm shaft is in linkage with a driven wheel which is engaged with a driving wheel; a rotation shaft of the driving wheel stretches out of a shell of the lifter to be connected with the crank; and a rotation shaft of the worm wheel is in linkage with a rope wheel with cables wound around. The lift for the outdoor substation bus operation is capable of allowing staff to sit in a hanging basket and to turn a handle of the lift to achieve vertical lift. Furthermore, with the drive mechanism for increasing the speed of the lifting, the speed of the lift is fast so that work efficiency is improved.

The invention discloses a combined parking system, which comprises a stereoscopic garage, parking plates, a vertical lifting control system, and a plurality of horizontal shift control systems. A plurality of parking lots are disposed inside the stereoscopic garage from top to bottom, the parking plates are used for parking vehicles, the vertical lifting control system disposed inside the stereoscopic garage is capable of driving the parking plates and the vehicles parked on the parking plates to move up and down synchronously, and the horizontal shift control systems disposed on the parking lots are capable of integrally and horizontally moving while horizontally moving the vehicles parked on the parking lots. The vertical lifting control system comprises a lifting mechanism and a vertical drive motor. Each horizontal shift control system comprises a bearing plate, a shift mechanism and a horizontal drive motor. The combined parking system is reasonable in design, simple in structure, economical, practical, simple in operation and effective in use. Simple installation and test show that a plurality of combined parking systems rested together can be combined into a large-sized garage in a short time, and the requirement of part of existing places on temporary parking is met.

The invention discloses a novel material transfer device. The device is characterized by comprising an X-axis bidirectional driving mechanism and an Z-axis vertical lifting mechanism, wherein the X-axis bidirectional driving mechanism comprises an upper cantilever, a lower cantilever, a cantilever seat and a lower cantilever driving mechanism; the upper cantilever is connected above the lower cantilever in a rolling mode; the lower cantilever is connected above the cantilever seat in a rolling mode; the lower cantilever driving mechanism is connected with the lower cantilever through a transmission mechanism; the upper cantilever is drawn to do motion in the same direction through chain transmission when the lower cantilever moves on the cantilever seat; the cantilever seat of the X-axis bidirectional driving mechanism is fixed on the pedestal of the Z-axis vertical lifting mechanism; the Z-axis vertical lifting mechanism comprises a lifting stander, a stander guide rail, a lifting motor and a chain transmission; the lifting stander is connected in the stander guide rail in a rolling way; one end of the chain transmission is fixedly connected with the top end of the lifting stander, and the other end of the chain transmission is fixedly connected to the lower part of the lifting stander; and the lifting stander moves up and down in a Z-axis direction under the driving of the lifting motor.

The invention discloses an automatic spinning cake taking device for viscose filaments. The automatic spinning cake taking device comprises a frame body with a large cover lifting device, a spinning cake taking lifting device, a spinning cake grasping device and a horizontal spinning cake power device; uprights of the frame body are of guide rail structures for the spinning cake taking lifting device and the large cover lifting device to move vertically. The automatic spinning cake taking device for viscose filaments is simple in structure; the main body of the automatic spinning cake taking device is of a frame structure; by means of mutual cooperation of all the parts, automatic lifting and horizontal movements of spinning cakes can be realized; the automatic spinning cake taking device is applicable to R535A and other spinning machines, and capable of realizing taking and lifting of large covers of barrels and completing a process from obtaining spinning cakes by using spinning machines to transferring and collecting the spinning cakes; furthermore, the automatic spinning cake taking device overcomes such defects of low working efficiency, high production cost and the like of an existing manual operating mode, and has good stability and continuity.

The invention provides a draught fan motor fixing plate interlocking structure for draught fan coil pipes, and relates to the field of air conditioners. The problems that multiple limiting cannot be carried out to reduce force bearing and the looseness probability of fixing bolts, and elastic deformation of the top of an air supply box cannot be reduced and eliminated are solved. The draught fan motor fixing plate interlocking structure for the draught fan coil pipes comprises the air supply box. A supporting and noise reducing structure is welded to the top end face of the air supply box. Asa lead screw nut structure is formed by a threaded rod A, a threaded pipe and a telescopic rod jointly, vertical lifting of the threaded pipe can be achieved by rotating the threaded rod A, a turbo-worm structure is formed by a threaded rod B and a gear jointly, at the moment, vertical lifting of the threaded pipe can be achieved by rotating the threaded rod B, the convenience during adjusting isimproved, the threaded pipe vertically rises when the threaded rod B is rotated clockwise, when the top of the threaded pipe abuts against a wall, at the moment, the top end face of the air supply boxis in a bent state, thus, elastic deformation of the top end face of the air supply box can be eliminated, and then vibration is prevented from being generated.

The invention relates to a hang glider device with cross-flow fans, which comprises a main body skeleton, wings and an operating lever. The cross-flow fans are installed at the front edges of the wings. Cowlings are arranged below the cross-flow fans. Driving devices are installed on one side of the cowlings. A cabin hanger is hinged with the central part of the main body skeleton. The hang glider device with cross-flow fans has the beneficial effects that the hang glider device can realize vertical lifting and lowering, a runway is not required and a space with area being several square meters only is required; the energy consumption is low and a fraction of the energy consumption of a helicopter; the safety is excellent and the hang glider device can glide under the situation of no power; and when power is available, the stall speed is zero; clean energy such as electric energy and solar energy is used; the linear speed of fan blades is low and the noise is low relative to a propeller structure; the manufacturing cost is low, the hang glider device is simple and convenient to disassemble and assemble and facilities such as hangars are not required; and the hang glider device is simple to control.

The invention provides a delivery device and delivery method for open-cast mining, which can solve the problems in the prior art that the transportation cost is high and the efficiency is low due to adoption of a single-bucket truck for transportation. The delivery device for the open-cast mining comprises a pit material conveyor, a crusher, a material output machine, a material hoister and a ground material conveyor, wherein the pit material conveyor is parallel to the mining surface of a pit, and is connected to the material delivery inlet of the crusher, and the material delivery outlet of the crusher is connected to the material conveyor; the material hoister comprises a lower part horizontal section, a middle inclined hoisting section and an upper part horizontal section, and the lower part horizontal section is connected with the material output machine. Through the adoption of the delivery device, the transportation for an open pit mine is facilitated greatly, the transportation cost is reduced, and the transportation efficiency is improved; the conveyor belt of the material hoister is a steel wire rope composite elastomer high tenacity hoisting conveyor belt, the tenacity is high, the stiffness is large, and the connection strength of a diaphragm plate and a base band as well as the diaphragm plate and the flange is high, so that large dip angle and long distance hoisting can be realized, and vertical hoisting can be also realized.

The invention provides a biological floating island and a wetland water body repairing system with the biological floating island. The biological floating island comprises a balancing weight, a planting tank, water permeating holes and a floating block, and is characterized in that the balancing weight is located at the bottom end of a supporting column, the top end of the supporting column is connected with a limiting block through a bolt and a mounting groove, and the outer part of the supporting column is connected with a floating island frame through a sliding opening; a splicing opening is formed in the inner end of a planting frame, and the planting tank is arranged on the upper end face of the planting frame; a bonding groove is formed in the bottom of the planting frame, and the floating block adheres to the interior of the bonding groove; a protective net is arranged above the planting frame, and connecting pieces on the outer side of the protective net are connected with thefixing grooves in the floating island frame through bolts. By means of the biological floating island and the wetland water body repairing system with the biological floating island, vertical liftingof the biological floating island along with the water surface can be achieved, deviation of the biological floating island is avoided, and maintenance personnel can conveniently replace and maintainplants on the biological floating island.

The invention discloses a lifting device for an ash collection cylinder of a dust remover. The lifting device comprises a bottom plate and a support plate, wherein a first limiting plate and a second limiting plate are arranged on the bottom plate; a first limiting groove and a second limiting groove are formed in the first limiting plate and the second limiting plate correspondingly; the two sides of the bottom of each support plate are both fixed with first limiting rods which are positioned in the first limiting groove and the second limiting groove; a first parallel four-bar-linkage mechanism and a second parallel four-bar-linkage mechanism are arranged at the positions, on the two sides of the support plate, of the bottom plate and are connected with each other through a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft which are parallel to each other; the support plate is placed on the first rotating shaft and the second rotating shaft; a handle is also fixedly mounted on the third rotating shaft or the fourth rotating shaft; a locking mechanism is arranged between the handle and the bottom plate. By utilizing the lifting device, the ash collection cylinder can be lifted up and down, so that the matching of the ash collection cylinder and a lower opening of an ash collection hopper is conveniently carried out, and the labor intensity of workers is relieved.

The invention relates to an ultralong telescopic chute tube driving structure. The ultralong telescopic chute tube driving structure comprises a first driving mechanism for dragging an upper chute tube to carry out telescopic motion and a second driving mechanism for dragging a lower chute tube to carry out telescopic motion. The ultralong telescopic chute tube driving structure is simple in structure and convenient to use, independent drive for the upper chute tube and the lower chute tube is achieved through the arrangement of the first driving mechanism and the second driving mechanism, the second driving mechanism achieves three-point supporting in the mode that three steel wire ropes are combined with steel wire rope connecting points evenly distributed on the lower chute tube, the problems of deflection and blocking of the chute tubes in the ultralong telescopic stroke are avoided, a plane is determined through three-point supporting, and the chute tubes are evenly stressed and achieve vertical lifting. The telescopic strokes of the chute tubes can reach 23 m, working efficiency is greatly improved, and the requirements for ship loading at different water levels and ship berth entering are met.

The invention relates to the technical field of care beds, in particular to a lifting care bed. The lifting care bed comprises a bedstead, a bed tail board and lifting frames; the bedstead is used fora patient or severely-disabled person during hospitalization or home rehabilitation; the bed tail board is arranged at the foot of the bedstead, relatively, the head of the bedstead is provided witha bed head board, and the bed head board is used for separating the foot and the head of the bedstead to facilitate nursing; the lifting frames are arranged below the bed tail board, fixedly connectedwith bed legs, and internally provided with lifting mechanisms, and the lifting mechanisms are perpendicular to the bed tail board and are used for lifting the care bed to make the care bed vertically lift and fall or aslant lift and fall. The situation that medical care personnel lift the patient on a sickbed is avoided, and the medical care burden of the medical care personnel is reduced.

A saucer-shaped aircraft comprises a saucer-shaped frame, and a power device and a transmission arranged in the saucer-shaped frame, wherein inner and outer annular tracks are arranged at the outer edge of the saucer-shaped frame; a forward-rotation suspending paddle mechanism and a backward-rotation suspending paddle mechanism are arranged in the two annular tracks, respectively; the power device drives the two suspending paddle mechanisms through the transmission; each of the forward-rotation suspending paddle mechanism and the backward-rotation suspending paddle mechanism comprises an annular paddle frame and a plurality of suspending paddles arranged on the paddle frame; the saucer-shaped frame is provided with an annular pipeline at the outer circle of the two annular tracks; an air inlet is formed at the front end of the annular pipeline, while an air outlet is formed at the rear end of the annular pipeline; and an air propeller is mounted on the annular pipeline. The saucer-shaped aircraft is compact and rational in structure, steady in flying gesture, capable of realizing vertical ascending and descending, stable in operation, high in safety and great in development space.

The invention relates to a hanger and a lifting device using the hanger, the lifting device comprises the hanger and a trolley frame, the trolley frame is provided with a lifting mechanism and a walking mechanism, the hanger comprises a fixing frame, a middle frame and a bottom frame which are sequentially arranged along the up and down direction, the fixing frame is fixedly arranged on the trolley frame, the bottom frame is connected to the lifting mechanism, the bottom frame is also provided with a connecting structure for connection with a heavy object to be lifted, a left up connection rod and a right up connection rod are arranged between the middle frame and the fixing frame, the left up connection rod and right up connection rod are parallel to each other in a left-and-right mode and are parallelly arranged, a left down connection rod and a right down connection rod are arranged between the middle frame and the bottom frame, the left down connection rod and the right down connection rod are parallel to each other in the left-and-right mode and are parallelly arranged, one of the left up connection rod and the left down connection rod tilts forward, the other one of the left up connection rod and the left down connection rod tilts backward, the middle frame, the fixing frame, the left up connection rod and the right up connection rod form a first parallelogram linkage mechanism; and the middle frame, the bottom frame, the left down connection rod and the right down connection rod form a second parallelogram linkage mechanism. The hanger solves the problem that due to the inertia effects in starting and stopping of a hanger in the prior art, swing of the heavy object to be lifted may be caused.

A hydraulic elevator platform with a longitudinal horizontal moving device comprises an elevator platform body, a fixed base, a hydraulic elevator mechanism and the longitudinal horizontal moving device. The longitudinal horizontal moving device is fixedly connected to the elevator platform body through a connecting frame. The longitudinal horizontal moving device comprises a driving device, a transmission shaft, a driving wheel I, a driving wheel II, a driven wheel I, a driven wheel II, conveyor belts I and conveyor belts II. The driving device is arranged at one longitudinal end of the connecting frame. The transmission shaft is connected with the driving device through a coupler. The driving wheel I and the driving wheel II are arranged on the transmission shaft. The driven wheel I and the driven wheel II are connected to the other longitudinal end of the connecting frame and respectively correspond to the driving wheel I and the driving wheel II. The conveyor belts I wind around the driving wheel I and the driven wheel I and are connected end to end. The conveyor belts II wind around the driving wheel II and the driven wheel II and are connected end to end. The longitudinal horizontal moving device is added on the basis of the base-fixed type hydraulic elevator platform, the hydraulic elevator platform with the longitudinal horizontal moving device not only can achieve perpendicular lifting of heavy-load goods, but also can achieve longitudinal horizontal moving of the goods, improves working efficiency, and reduces production cost.

The invention relates to the field of workpiece hoist and transportation on automatic production connection lines, in particular to a vertical lifting conveyor. A link plate conveying unit disclosed by the invention is in closed connection formed by connecting a plurality of lower link plates and a plurality of upper link plates in an end to end manner. A left baffle and a right baffle are arranged on two sides of the front side of the link plate conveying unit; an outer lifting baffle is arranged in a front side area of a to-be-lifted section of the link plate conveying unit; a lifting barrier plate is arranged on the upper part of a space between the outer lifting baffle and the link plate conveying unit; a discharging channel is formed in one side below the lifting barrier plate; a plurality of groups of lifting block units are mounted on the link plate conveying unit; a feeding channel is mounted on one side on the lower part of the link plate conveying unit. The device disclosed by the invention is capable of realizing vertical lifting of workpieces and low in cost, and has the advantages that the device is durable in use and attractive in appearance, the lifting block units are easy to mount, the distance is easy to adjust, parts on a link plate conveyor belt are easy to replace and maintain.

The invention relates to a ship crane for a navigation height limit area. The ship crane comprises a revolution driving platform, a bearer is arranged under the revolution driving platform, crossbeamsare arranged at the left side and the right side of the bearer, a revolution driving platform slide way and a rear strut slide way are arranged above the beaer and the crossbeams, the revolution driving platform is arranged on the revolution driving platform slide way, a rear strut is arranged on the rear strut slide way, a hinge seat is arranged at the side part of the rear strut slide way, therear strut is fixed on the hinge seat through a nut, rollers are arranged under the revolution driving platform and the rear strut, a boom and a boom cylinder are arranged above the revolution drivingplatform, a lifting arm is hinged to the top of the boom, the cylinder body of the boom cylinder is hinged to the bottom of the boom, the end part of the piston rod of the boom cylinder is hinged tothe lifting arm, a front strut is hinged to the side part of the boom, and a hoist is arranged at the side part of the rear strut. The ship crane has the advantages of simplified structure, high reliability, excellent performances, and suitableness for the navigation height limit area.

The invention discloses an inclined guide rail lifting device for an AGV trolley. The inclined guide rail lifting device for the AGV trolley comprises a bottom plate, a lifting top plate and a jackingmechanism, wherein the bottom plate is fixed on an AGV body, the lifting top plate is provided with a downward top side plate, the bottom plate is provided with an upward bottom side plate, and the jacking mechanism comprises a linear motor, a sliding block, a rolling bearing and an oblique sliding groove; a stator of the linear motor is fixedly installed on the bottom side plate, a rotor of thelinear motor is matched with the stator, and the rotor can reciprocate horizontally along the stator; one side of the sliding block is fixedly connected with the rotor of the linear motor, the other side of the sliding block is provided with a transmission shaft matched with the inner ring of the rolling bearing in an extending mode, the outer ring of the rolling bearing is installed in the oblique sliding groove and matched with the oblique sliding groove; and the oblique sliding groove is fixed on the top side plate. The inclined guide rail lifting device for the AGV trolley has the beneficial effects that the jacking mechanism is installed on the outer side of the lifting top plate so that the space between the lifting top plate and the bottom plate can be effectively utilized, the volume is reduced, and the height of the vehicle body of the AGV trolley is reduced; and by controlling the linear motor to adjust the lifting speed, the working efficiency is improved.

The invention provides a bidirectional screw rod device and a care sickbed lifting device, and belongs to the field of transmission devices. The bidirectional screw device comprises a screw rod body, a left-handed assembly and a right-handed assembly, wherein a left-handed thread and a right-handed thread are arranged at the two ends of the screw rod body respectively; nut fixing baffle blocks are arranged on the screw rod body; the left-handed assembly comprises a left-handed nut and a limiting slide block; the right-handed assembly comprises a right-handed nut and a limiting slide block. The bidirectional screw rod device is quite steady to use, free of noise, good in using effect and long in service life. The care sickbed lifting device comprises a bedstead and a base, wherein two lifting connecting rod assemblies are symmetrically arranged on the two sides of the base; the upper end of each lifting connecting rod assembly is hinged to the bedstead, the lower end of each lifting connecting rod assembly is hinged to the base, and the bidirectional screw device is arranged between the two lifting connecting rod assemblies. During the use, the care sickbed lifting device does not generate noise in the lifting process, so that rest of a patient is not affected, a good rehabilitating environment can be provided for the patient and the patient can heal faster.

The invention relates to a transformation construction method for an existing large space structure, belongs to the technical field of building construction, and is used for solving the problem of erection of an all-round scaffold for renovation transformation construction of the inner surface of an existing large-clear-height and large-span building space. According to the construction method, a first section of sliding rail is installed through a temporary scaffold, the sliding rail is connected with a top beam plate structure of the existing large space structure, then an automatic walking system is installed, then a lifting system, a sensor and camera equipment are installed on the automatic walking system, then splicing and hoisting of a whole suspension type steel platform system are completed, then the construction operation platform is hoisted through the lifting system, a vertical logistics system is installed, then the automatic walking system is operated to move to a designated position along the track, temporary separation is carried out on a construction area and an area which is not temporarily constructed; rolling construction is repeated, and finally renovation and transformation construction of all construction areas is completed.

A folding crane, including ship deck, base column, slewing mechanism, column, hydraulic winch, hydraulic winch, main arm, main arm oil cylinder, luffing arm, luffing arm oil cylinder, auxiliary hook, main hook, its features There is a base column fixed on the deck of the ship, a slewing mechanism is installed on the base column, a column is installed on the slewing mechanism, the top of the column is hinged with one end of the main arm, and the other end of the main arm is hinged with one end of the luffing arm. An auxiliary hook pulley assembly is installed on the other end of the luffing arm, a main hook pulley assembly is installed in the middle of the luffing arm, and a main hook fixed pulley is installed on the side of the luffing arm opposite to the auxiliary hook pulley assembly. The present invention adopts integral slewing drive to reduce the height of the whole machine, and the door-shaped folding arm structure reduces the overall size and height of the whole machine, saves installation space, simplifies the structure of the crane, improves reliability, and can meet the requirements of larger cranes. Working range and lifting height, excellent performance, high reliability, convenient operation and easy maintenance.

The invention discloses a vertical elevating device with a deadweight balancing capability. The vertical elevating device is characterized in that a parallelogram transmission mechanism is arranged; a first rocking lever and a second rocking lever are articulated on top frames on both sides respectively; the first rocking lever is connected with the second rocking lever through a pull rod; the outer side rod ends of the first rocking lever and the second rocking lever are provided with a first slide block and a second slide block which are positioned at the same height; the first slide block and the second slide block are connected with a horizontal elevating framework through a sliding pair; and meanwhile, a crank rocker mechanism serving as a driving mechanism, a vertical elevating forked mechanism and a deadweight stabilizing unit constructed by a hydraulic cylinder are arranged. Through coupled movement of each mechanism, horizontal and vertical elevation for carried objects is realized; and the vertical elevating device is simple in structure, and has a high loading capability.