49results about How to "Expand the lifting range" patented technology

Hydraulic valve circuitry adapted for automatic weight-responsive control of load-clamping members of a load-lifting system having a free lift mast. The load-lifting system generally includes one or more fluid power actuator for applying a gripping force to a load, at least one elongate, longitudinally-extensible fluid power lifting device having a free lift range of motion and at least one main lift range of motion, and manually operated load-clamping and load-lifting selector valves. The hydraulic valve circuitry provides, independently, weight-responsive control of the load-clamping members when lifting a load, full-time automatic weight-responsive force control of the load-clamping members without concurrent manual actuation of load-clamping or load-lifting selector valves, and equalization of sensed load weight so that the sensed load weight is substantially independent of the longitudinally-extensible position of the lifting device.

An improved wheelchair lift-transfer device provides capabilities for a patient or caregiver to independently control the wheelchair and lift functions to elevate and move about safely. The patient can use a handheld wireless remote control and summon their wheelchair lift-transfer device from across the room, to their bedside, then independently transfer into the device and then drive it about in their home, raising and lowering their body as needed.

The invention discloses a lifting device for medical equipment. The lifting device for the medical equipment comprises a lifting base, a driven gear, a clamping sleeve, a first screw rod, a first bearing, a first fixing plate, a first nut base, a first lifting base, a second lifting base, a first moving sleeve, a second moving sleeve, a first limiting block, a second limiting block, a second screw rod, a guiding groove, a second nut base, a second fixing plate, a cover plate, a second gear, a second bearing, a supporting base, a middle gear, a first gear, a flat key, a motor and a driving gear. The lifting device for the medical equipment is simple and reasonable in structure, low in manufacturing cost and convenient to install. When use, firstly the motor is started to drive the driving gear, and the driving gear drives the first screw rod to rotate through the driven gear; the first lifting base is driven to move up and down by rotating of the first screw rod through the first nut base, and meanwhile, the middle gear is driven to rotate by rotating of the first screw rod through the first gear. Rotating of the middle gear is realized by the second gear which drives the second screw rod at the right side of the first lifting base to rotate, and the second screw rod rotates to driven the second lifting base to move up and down through the second nut base.

The invention discloses an overweight electric hoist which comprises two winding drums and a pulley block. The two winding drums are mounted reversely and arranged in a staggered manner; a steel wire rope is respectively connected with the two winding drums through the pulley block; the pulley block at least includes four fixed pulleys and five movable pulleys; hanging hooks are mounted on the movable pulleys of the pulley block. The invention has the advantages of convenient use, safety and reliability, and expands the lifting range of the electric hoist.

The invention discloses a swing arm type underslung crane. The underslung crane comprises a cross beam, wherein a sliding seat is in clearance fit with the bottom of the cross beam, a balancing weightis arranged below the left side of a swing arm, an electric hoist is fixedly connected to the right side of the bottom of the swing arm, and a transmission assembly is arranged below the sliding seat. According to the swing arm type underslung crane, through threaded connection between a screw and the sliding seat and meshing connection between a driving wheel and driven wheels above, the slidingseat can drive the swing arm to transversely slide and axially rotate simultaneously, so that the hoisting range is expanded, and the use practicability and convenience are improved; the swing arm can transversely slide in a sleeve, then the swing arm is transversely prolonged, the application range is further expanded, and the use applicability is improved; and through clearance fit between a short rod and a rotating rod and corresponding arrangement of the rotating rod and the two driven wheels, the rotating rod can clamp the two driven wheels, then the swing orientation and the telescopinglength are limited, and the use stability and precision are further improved.

The invention provides an electric adjustable jack which comprises a jack head assembly, a lifting assembly, a power transmission assembly and a base assembly. An automatic locking assembly is located in the lifting assembly. Compared with a straight rod shaped lifting assembly of a traditional scissor jack, when the lifting assembly with the bent state lifts an identical object to the same height, torque needing to be output by a motor is smaller, the lifting assembly can be adjusted to the ideal state according to the requirement of the application environment, the requirement of a jack for the torque output by the motor is lowered, and the lifting capacity of the jack can be improved temporarily, so that the jack adapts to the more narrow working environment, and meanwhile the jacking range of the jack is greatly enlarged.

The invention discloses a fabricated building wallboard hoisting device. The fabricated building wallboard hoisting device comprises a fixing base, two supporting plates are symmetrically welded to the upper surface of the fixing base, grooves are formed in the adjacent sides of the two supporting plates, first plate bodies are slidably connected into the grooves, and a fourth plate body is weldedto one side of one of the supporting plates. When a wallboard is hoisted, a motor drives a rotating rod to rotate, the rotating rod drives a second board body to rotate, a first rod body can slide inside a fifth through groove, the second rod body rotates in a first through hole formed in one side of a hinge plate so that a hoisting structure can be moved out of the upper portion of the fixing base, the situation that a worker needs to place the wallboard below the device and then hoisting can be conducted is avoided, a first shell is pushed to move front and back, the first shell drives a U-shaped plate body to slide on the outer side wall of the first plate body, and the U-shaped plate body drives a sliding block to slide inside the sliding groove, so that the hoisting range of the device is enlarged, and the hoisting efficiency of the device is greatly improved.

The invention relates to a method for mounting a blast furnace framework structure by utilizing a transverse hoisting beam, and is characterized in that firstly, the H-shaped transverse hoisting beam is prepared, and hoisting lugs are respectively welded on an upper flange plate and a lower flange plate of the transverse hoisting beam; before hoisting, a component ready for hoisting is welded with a hoisting lug and is connected at the lower side of the transverse hoisting beam through a steel wire rope; followed by, one end, being connected with the component, of the transverse hoisting beam is connected with a hook head of a 4000 t.m tower crane by a steel wire rope, the other end, being not connected with the component, of the transverse hoisting beam is connected with a hook head of the 4000 t.m tower crane by a steel wire rope and a guide chain, and the guide chain is pulled tightly; finally, the component is slowly hoisted; when the component is hoisted 100 mm away from the ground, hoisting is stopped, and the tensile force of the guide chain is adjusted, so that the transverse hoisting beam is kept horizontal, and after adjusting is finished, hoisting is continued and the component is mounted at a right position. The operation is simple; and through the transverse hoisting beam, the working radius of the tower crane is extended, the hoisting scope of the tower crane is enlarged, the construction cost is reduced, and the requirement of green construction is met.

The invention relates to the technical field of building construction, and discloses a lifting device used for building prefabricated slabs. The lifting device comprises a fixed bottom plate, fixed columns are mounted at the upper end of the fixed bottom plate, a left rail is mounted at the upper end of the fixed column on the left side, a left rolling wheel is rotatably arranged at the upper endof the left rail, and a guide column is rotatably arranged in the middle of the left rolling wheel. A right rail is mounted at the upper end of the fixed column on the right side, a right rolling wheel is rotatably arranged at the upper end of the right rail, a rotating shaft is fixedly installed in the middle of the right rolling wheel, walking frames are installed at the two ends of the rotatingshaft through bearings, a motor plate is installed at the upper ends of the walking frames, a rotating motor is installed at the upper end of the motor plate, an output shaft of the rotating motor isconnected with a driving belt wheel, and the lower end of the driving belt wheel is connected with a driven belt wheel through a belt. According to the lifting device, lifting operation to the building prefabricated slabs is ensured, the lifting device has a power source and is good in maneuverability, the lifting range is further widened, and meanwhile the stability of the building prefabricatedslabs in the lifting process is ensured by arranging balance columns and balance wheels.

The invention provides a hoisting device for solving the problem that an existing hoisting device can not operate in a narrow place. The hoisting device comprises a main mast, a subsidiary rod, an amplitude variation part, a slip flexible nest and a chain block, wherein the slip flexible nest is sleeved on the main mast, and can slip along the main mast; the chain block is fixed at one end of the main mast and is connected with the slip flexible nest through a rope; one end of the subsidiary rod is hinged with the slip flexible nest; the amplitude variation part connects the other end of the subsidiary rod with one end of the main mast. By adopting the hoisting device, the subsidiary rod can be prevented from being blocked by obstacles around buildings, thereby achieving the aim of expanding the hoisting range.

The invention relates to a multifunctional rail-mounted floating crane which comprises a U-shaped hull, a lifting system and an intelligent adjustment and control system. The U-shaped hull comprises astem, a left sheet body and a right sheet body, and the left sheet body and the right sheet body are spaced at a certain distance; rails arranged in the length direction of the floating crane are installed on decks of the left sheet body and the right sheet body; the lifting system comprises at least one set of trolley walking mechanisms and lifting trusses, the two ends of each lifting truss arefixedly installed on the trolley walking mechanisms on the left sheet body and the right sheet body, and the trolley walking mechanisms walk on the rails to drive the lifting trusses to move; liftingdevices with a lifting function are installed above the lifting trusses; and the intelligent adjustment and control system controls the trolley walking mechanisms and the lifting devices to move. Inthe lifting process of the multifunctional rail-mounted floating crane, the lifting trusses can move in cooperation with the lifting devices, and the stability of lifting operation is improved; and the multiple sets of lifting trusses can be installed on the rails according to the actual lifting capacity, unit operation and online cooperation can be conducted under control of the PLC intelligent adjustment and control system, and the lifting range is enlarged.

The invention relates to the technical field of medicine storage devices, and discloses the medicine storage device with definite classification. The device comprises a tank body, a top cover is clamped at the top end of the tank body, and the interior of the tank body is divided into a first chamber, a second chamber, a third chamber and a fourth chamber through a first vertical plate and a second vertical plate; and the bottom of inner cavity of the first chamber is provided with a box body through a formed groove, a hanging lug is fixedly arranged on the side, located inside the bottom opening of the first chamber, of the box body, a barrel body is placed at the part, right above the box body, in the first chamber through an L-shaped partition plate, and a separating device is fixedly arranged inside the barrel body. According to the medicine storage device with the definite classification, a traction rope is arranged so that a cover plate can be pulled up, therefore, the purpose ofconveniently taking the medicine is achieved, meanwhile, the same purpose can be achieved by rotating a movable frame, convenience and quickness are achieved, and the storage amount is also large andthe storage is clear.

A hydraulic jack comprises a driving device, a base and a cylinder body which is movably connected with the base. The cylinder body is internally provided with a main hoisting groove and an auxiliary hoisting groove, the bottom of the main hoisting groove and the bottom of the auxiliary hoisting groove are communicated mutually, and the main hoisting groove and auxiliary hoisting groove are provided with a main hoisting block and an auxiliary hoisting block respectively, wherein the main hoisting block and the auxiliary hoisting block can ascend and descend along the inner wall of the main hoisting groove and the inner wall of the auxiliary hoisting groove respectively. The sealed space formed by the main hoisting block, the auxiliary hoisting block, the main hoisting groove and the auxiliary hoisting groove is injected with hydraulic oil and pressure-bearing grounders used for enhancing the pressure-bearing performance of the hydraulic oil. The driving device comprises two driving motors and racks, wherein the two driving motors are respectively provided with a driving gear, the racks are arranged on the auxiliary hoisting block and matched with the driving gears, and the rotation directions of the two driving motors are opposite to drive the driving gears to lift the auxiliary hoisting groove. Oil leaking and gas leaking are avoided when the hydraulic jack is used, the safety performance and the stability of the jack are improved, the occurrence that the using of the jack is affected when the hydraulic oil is polluted can be prevented, and the lifting speed and precision of the jack can be improved.

The invention relates to the technical field of engineering machines, and particularly discloses a telescopic arm structure, a working arm and an engineering machine. The telescopic arm structure comprises a first section arm, a second section arm, a compensation mechanism and an oil circuit, the first section arm is slidably arranged on the second section arm in a sleeving mode, and the first section arm can extend or retract relative to the second section arm so that the working radius of a lifting appliance can be adjusted, the lifting appliance has a large working range and is high in applicability, the two ends of the compensation mechanism are fixed to the first section arm and the second section arm correspondingly, and the compensation mechanism can extend in a bent mode and expand; and the oil circuit is formed in the compensation mechanism in a penetrating mode and used for being connected with the lifting appliance to supply oil to the lifting appliance. When the second section arm extends out relative to the first section arm, the compensation mechanism extending in the bent mode expands; and when the second section arm retracts relative to the first section arm, the expanding compensation mechanism extends in the bent mode, and compared with related technologies, falling of the oil circuit can be avoided.

The invention relates to the field of rotary cranes, and specifically relates to a folding-arm telescopic rotary crane. The folding-arm telescopic rotary crane comprises a base, wherein a rotary seatis installed on the base; a boom is hinged to the top of the rotary seat; a pulley is hinged to the top end of the boom; a lifting hook is installed on the pulley through a lifting rope; a motor driving the lifting hook to lift is installed on the rotary seat; the rotary seat comprises a rotary table at the bottom; the boom comprises a first-stage boom; an oil cylinder A is hinged to the rotary table; a piston rod of the oil cylinder A is hinged to the bottom surface of the first-stage boom; a second-stage boom is hinged to the top end of the first-stage boom; an oil cylinder B is further hinged to the bottom surface of the first-stage boom; a piston rod of the oil cylinder B is hinged to the bottom surface of the second-stage boom; a third-stage boom sleeves into the second-stage boom; anoil cylinder C is fixedly installed on the side surface of the second-stage boom; the top end of a piston rod of the oil cylinder C is fixedly connected with the third-stage boom; a guide wheel is further hinged to the top end of the first-stage boom; and the lifting rope is connected with the motor through the pulley and the guide wheel. The folding-arm telescopic rotary crane is larger in lifting range, and applicable to improvement for an existing rotary crane.

The invention discloses a hoisting maintenance device and a wind driven generator and belongs to the technical field of wind power generation. The hoisting maintenance device comprises a supporting mechanism, a guiding mechanism, a rotating mechanism and a hoisting assembly. The guiding mechanism comprises a cross beam and a longitudinal beam; the rotating mechanism is rotatably connected to the guiding mechanism; and the hoisting assembly is used for hoisting a to-be-hoisted part along a vertical direction and can slide on the guiding mechanism and the rotating mechanism. The hoisting maintenance device arranged in a cabin of the wind driven generator not only can hoist damaged parts in the cabin of the wind driven generator and new parts out of the cabin anytime as needed for improving the maintenance and replacement efficiency favorably, but also is not affected by external weather conditions during hoisting, so that the hoisting maintenance device further can meet the using demands. In addition, the hoisting maintenance device is provided with the hoisting assembly sliding on the guiding mechanism and the rotating mechanism, so that the hoisting range is enlarged and the universality is improved.

The invention discloses printing roller installation equipment for paper product printing in the technical field of printing equipment. The printing roller installation equipment comprises a base, wherein idler wheels are arranged at the four corners of the bottom of the base, a hand push rod is arranged on the right side of the base, printing roller storage equipment is arranged on the middle andleft sides of the top of the base, a supporting stand column is arranged on the right side of the top of the base, an electric turntable is arranged at the top of the supporting stand column, and a supporting block is arranged at the top of the electric turntable. The printing roller installation equipment is simple in structure and convenient to operate, does not need to be carried by a worker,saves manpower, can also improve the maintenance efficiency of a printing machine and is suitable for installation of different types of printing rollers. Through the idler wheels, the free movement of the printing roller installation equipment can be realized to facilitate the assembling and disassembling of the printing rollers; the printing roller storage equipment can be used for storing the printing rollers to be installed or disassembled; and through the electric turntable, the rotation of an electric hoist can be realized to facilitate the lifting of the printing rollers.

The invention discloses a lifting device. The lifting device comprises a cross beam, supporting columns, walking mechanisms, a cantilever telescopic mechanism, a super-lift cable pulling mechanism anda movable hanging mechanism, wherein the supporting columns are connected to the two ends of the cross beam; the walking mechanisms are connected to the bottoms of the supporting columns; the cantilever telescopic mechanism is arranged in the cross beam, and can be retracted and extended relative to the cross beam, and the cantilever telescopic mechanism is connected with the supporting columns through the super-lift cable mechanism; and the movable hanging mechanism is movably arranged on the cross beam and the cantilever telescopic mechanism. The lifting device is wide in operation range, flexible and convenient to use and has a fire extinguishing function.

The invention relates to the technical field of metallurgical appliances, in particular to a metallurgical spreader with a lateral extension mechanism, which includes a top connecting beam with a built-in top lifting motor and a top lifting beam with a built-in bottom lifting motor, and the two ends of the top lifting beam are fixedly connected by bolts. The lateral storage frame with the opening on the right side has a bottom storage slot connected to the interior of the lateral storage frame at the lower end of the top lifting beam. A metallurgical spreader with a lateral extension mechanism of the present invention sets lateral extension frames with stretchable internal assembly blocks on both sides of the top lifting beam, so that the structure of the spreader can be adjusted, and the structure of the spreader can be adjusted through the top connecting beam. The electric winch drives the chain inside the lateral extension frame to hoist the workpiece at the bottom, which not only greatly improves the hoisting range of the metallurgical spreader, but also greatly improves the safety during the hoisting process by fixing the chain laterally.

The invention provides an electric crane and a super-electric crane, and relates to the technical field of crane structures. The electric crane and the super-electric crane are designed to solve the problems that in the prior art, a battery of an electric crane is large in occupied space and large in weight, and consequently the electric crane is heavy and large in occupied area. The electric crane comprises an upper crane body, a lower crane body, an arm frame, an amplitude variation mast, a center weight box, a rear weight box and a battery pack. The upper crane body is rotationally erectedabove the lower crane body. The arm frame, the amplitude variation mast and the rear weight box are sequentially arranged on the upper crane body. The center weight box is arranged on the lower cranebody. The battery pack is arranged on the center weight box and/or the rear weight box and used for providing electric power of work for the electric crane.