3116results about "Trolleys" patented technology

The invention relates to a method and a construction and / or a materials-handling machine for guiding and moving a working head, in particular a 3D print head, wherein at least three revolving tower cranes are attached to each other with their booms, wherein according to one aspect of the invention a guide beam carrying the working head is attached to at least two trolleys of two revolving tower cranes, and the working head is adjusted and moved in its working position by moving the trolleys along two booms of two revolving tower cranes.

The invention discloses a transferring and hoisting structure for engineering construction and a construction method of the transferring and hoisting structure, and relates to the technical field of engineering construction. The device comprises two groups of cross beams which are distributed front and back; the crown block assembly comprises a middle plate, a movable plate, a top plate, a mounting wheel and a driving wheel; the hoisting assembly comprises a fixed plate fixedly connected to the lower portion of the movable plate, a first winding roller rotationally connected to the fixed plate and a winding steel cable, the lower surface of the fixed plate is fixedly connected with three sets of mounting boxes in a circular array with the winding steel cable as the axis, and the interiors of the three sets of mounting boxes are rotationally connected with second winding rollers; the three second winding rollers are wound with stable steel cables, and the bottom ends of the stable steel cables are fixedly connected with connecting frames. According to the winding steel cable hoisting device, the three auxiliary steel cables distributed in a conical shape exert the pulling force effect in three directions on the winding steel cable, so that the hoisting stability of the winding steel cable is improved, meanwhile, the winding steel cable is conveniently, automatically and regularly smeared with lubricating oil, and mounting and dismounting are convenient.

An overhead transport vehicle includes an elevator including a base on which a holding device is provided, a plurality of suspension attaching portions to which each of the plurality of belts are attached and supporting the base to be vertically movable from below in a vertical direction via a vibration isolator, and a lock mechanism that fixes a relative positional relation between each of the plurality of suspension attaching portions and the base. The overhead transport vehicle further includes a controller that controls so that the lock mechanism is locked to fix a relative position relation at least partially during elevating operation of the elevator and also controls so that the lock mechanism is unlocked by releasing the lock at least partially during traveling operation of a body unit.

The invention discloses a lightweight Chinese-style bridge crane, relates to the field of hoisting equipment, and aims to solve the problems that an existing bridge crane is simple in structure, easy to shake when hoisting an object and too high in production cost and transportation cost due to the fact that the overall equipment is too large and too heavy, the lightweight Chinese-style bridge crane comprises two groups of movable frames, a main beam and a crane carriage, the two sets of moving frames are fixedly connected to the two sides of the main beam, the hoisting trolley is slidably connected to the main beam and comprises a hoisting block and a hoisting hook, the hoisting hook is rotationally connected to the bottom of the hoisting block, a hoisting rope is connected between the upper end of the hoisting block and the hoisting trolley, hoisting block balancers are fixedly connected to the two sides of the hoisting block, and adjusting supports are arranged on the two sides of the main beam. The device has the advantages that the hoisting block is stabilized through the hoisting block balancer, shaking in the hoisting process is avoided, the whole device is stabilized through the balance rope, the balance rope is light in overall weight, convenient to store and high in flexibility, the overall weight and size of the device are reduced, and the production and transportation cost is reduced.

The invention relates to a crane sling anti-swing device in the technical field of cranes, and the crane sling anti-swing device comprises a crane trolley, a sling with a movable pulley, a steel wire rope and a control system, the crane trolley is provided with a winding drum assembly for winding and unwinding the steel wire rope, and one end of the steel wire rope is wound and fixedly connected to the winding drum assembly; a pin shaft is fixedly connected to the middle of the swing rod, the swing rod is correspondingly hinged to the crane trolley through the pin shaft, and the two ends of the swing rod abut against the two vertical sections of the steel wire rope respectively, so that the steel wire rope deflects to drive the pin shaft to rotate; when the lifting appliance swings, the steel wire rope applies acting force opposite to the swinging direction of the lifting appliance to the lifting appliance in a manner of winding and unwinding the steel wire rope through the winding drum assembly, so that the swinging amplitude of the lifting appliance is reduced, and the function of preventing the lifting appliance from swinging is further realized; and workshop space cannot be wasted.

The invention provides an intelligent control system and an intelligent control method of a bridge girder erection machine, and relates to the technical field of bridge construction application, the intelligent system comprises a plurality of variable frequency controllers which are respectively installed on a front support and a middle support, a front crown block and a rear crown block, and a rear support, the variable frequency controller controls the rotating speed of the transverse moving motors of the front support and the rear support, the rotating speed of the walking motors of the front crown block and the rear crown block and the rotating speed of the front and rear running motors of the middle support and the rear support according to a control instruction of the PLC control system. The rotating speed of the motor is controlled through the frequency converter, so that the left-right moving synchronism of the front support and the middle support of the bridge girder erection machine is effectively controlled, the walking synchronism of the front crown block and the rear crown block on the left and right wheels on the track is effectively controlled, and derailment caused by inconsistent speeds of the wheels on the two sides of the track is avoided.

The invention relates to the field of mining underground transportation box loading and unloading, in particular to a vertical ceiling type mining underground transportation box loading and unloading device and a control method thereof, and the overall structure is composed of a rail conveying device, a lifting device, a lifting tool module and a modularized mining transportation box; the specific operation process comprises the steps that the lifting device adjusts the position of the lifting tool module, the lifting tool module is locked and lifted, the transportation box body is lowered, and the rail conveying device conveys the transportation box body. Due to the semi-automatic locking design of the lifting tool module, the loading and unloading efficiency is higher; the UWB is fused with the IMU for global positioning, and the problem of alignment of the lifting appliance and the transportation box body is solved. According to the scheme design, the practical engineering problem that an existing underground transport box body is laterally loaded and unloaded on a rail is solved, the lateral loading and unloading efficiency of the underground transport box is greatly improved, the labor demand is reduced, and intellectualization and safe and efficient mine construction are enhanced.

The utility model relates to a multifunctional combined type gantry lifting system which comprises a combined type lifting tower and a climbing type hydraulic jacking device. The combined lifting tower is composed of four stand columns, two longitudinal lifting beams, a plurality of transverse lifting beams, a lifting appliance, a longitudinal supporting structure and a transverse supporting structure. The climbing type hydraulic jacking device is composed of a hydraulic cylinder, a lower telescopic locking mechanism and an upper telescopic locking mechanism. According to the utility model, the main body structure assembled in a modularized manner is matched with the climbing type hydraulic jacking device, so that the hoisting requirements of equipment with different specifications can be met; the overall structure of the system is compact, the required site space is small when large equipment is hoisted, assembly, disassembly and transportation are convenient, the turnover utilization rate of the equipment is greatly improved, and the construction cost is reduced; and by matching with a horizontal sliding mechanism, vertical lifting and horizontal transverse moving of large equipment can be achieved, use is convenient and flexible, and applicability is high.

The utility model discloses a fixing mechanism for a truss crown block and a cross beam, and relates to the technical field of truss crown block limiting. The overhead travelling crane comprises an overhead travelling crane body, a driving assembly, a cross beam for supporting the driving assembly, and a clamping assembly for locking the overhead travelling crane body and the cross beam, the crown block body comprises a mounting plate, a winch fixed to the upper side face of the mounting plate, a hoisting roller connected with a winding roller of the winch through a steel cable, a lifting plate fixed to the hoisting roller and a supporting claw fixed to the lower edge of the lifting plate. A locking strip is fixed on the lower side surface of the guide rail; the clamping assembly comprises a supporting plate fixed to the edge of the upper side face of the mounting plate, an air cylinder fixed to the upper side face of the supporting plate, and a locking piece fixed to the telescopic end of the air cylinder. According to the utility model, the position of the crown block body relative to the cross beam is fixed through mutual matching of the additionally arranged clamping assembly and the locking strip fixed on the lower side surface of the cross beam, and the clamping assembly is simple in structure, convenient to operate and suitable for multi-position fixation of the crown block body.

The invention provides a hoisting device and a hoisting construction method, and the hoisting device comprises a track which is laid on the surface of a roof steel structure; the tool trolley is detachably arranged on the track and can move along the track; the lifting system is arranged on the tool trolley so as to lift and hoist the unit plate; and the two leveling systems are suspended at the top of the tool trolley and are respectively arranged on the two sides of the lifting system so as to adjust the mounting angle of the hoisting unit plate. When the hoisting device is used for hoisting construction, normal use of a tower crane is not occupied, other hoisting work is not affected, and benefits are high; building construction of floors under the roof is not affected, simultaneous operation can be achieved, and the construction period is shortened; and the method is not limited by application scenes, high requirements on the flatness and the bearing capacity of a traveling surface when a truck crane and a crawler crane are used for hoisting are avoided, and the applicability is good.

The invention discloses a safety device. The safety device comprises a crown block which at least comprises a front vehicle body and a rear vehicle body which are both provided with containing spaces; the supporting plate is provided with a front end and a tail end, and the supporting plate is configured to extend out of or retract into the accommodating space; the first pose adjusting mechanism is arranged at the front end of the supporting plate and at least comprises a lower baffle extending to the position above the supporting plate in the vertical direction; the second pose adjusting mechanism is configured on the top surface of the supporting plate and at least comprises two groups of clamping arms which are pivotally connected to the top surface of the supporting plate and elastic pieces which are used for elastically connecting the clamping arms with the supporting plate; when the supporting plates of the front trolley body and the rear trolley body extend out of the containing space, the lower baffles rotate to the front ends of the supporting plates from the inner side faces of the supporting plates so as to block the box cover, and protrusions of the box body are gradually clamped by the two sets of clamping arms. According to the invention, the problems that the wafer in the wafer box is easily damaged and the box cover of the wafer box is easily pushed by the wafer to open and fall off due to the fact that the wafer box easily shakes when moving along with the crown block can be solved.

The invention belongs to the technical field of cranes, and discloses an energy-saving bridge crane and a using method thereof.The energy-saving bridge crane comprises two longitudinal bridge guide rails, a transverse bridge guide rail is movably installed at the position between the top ends of the two longitudinal bridge guide rails, and a lifting frame is movably installed at the bottom end of the transverse bridge guide rail; hoisting cables are installed at the positions, close to the four corners, of the bottom end of the hoisting frame, the hoisting cables are connected with an external cable crane, and a telescopic rod is fixedly installed in the middle of the bottom end of the hoisting frame. Through rotation of the lead screw and the cooperation effect between the movable base and the adjusting assemblies and between the movable base and the stabilizing assemblies, after the device completes hoisting of goods, the multiple stabilizing assemblies can be automatically close to one another by operating the lead screw, so that after the goods are hoisted again, the side edges of the goods can make contact with the multiple stabilizing assemblies, and the stability of the goods is improved. And through the limiting effect of the stabilizing assembly, shaking of goods during hoisting is reduced, potential safety hazards are reduced, and safety accidents are avoided.

The invention relates to the technical field of wharf construction, in particular to high-pile wharf beam and slab erection integrated equipment which comprises a cross beam, and a longitudinal beam capable of transversely moving is arranged at the top of the cross beam; the hoisting trolley can longitudinally move on the longitudinal beam, and the hoisting trolley is used for hoisting the beam plate; the supporting leg assembly supports the cross beam, a longitudinal moving rail is arranged at the bottom of the supporting leg assembly, and the supporting leg assembly longitudinally moves on the longitudinal moving rail; the two ends of the longitudinal beam are provided with cantilever sections, the cantilever sections extend to the longitudinal outer sides of the supporting leg assemblies, during beam lifting, the longitudinal moving rails are laid on the long-piled wharf, the supporting leg assemblies drive the cross beam to longitudinally move to the edge of the long-piled wharf on the longitudinal moving rails, then the crane carriage is moved to the cantilever sections, and the crane carriage can move to the outer side of the edge of the long-piled wharf; and the crane carriage can hoist the beam plate outside the long-piled wharf, so that the step of reversing the beam through equipment such as a gantry crane and a beam transporting vehicle is avoided, the construction procedure is simplified, and the construction efficiency of the long-piled wharf is improved.

The invention belongs to the technical field of coal mine auxiliary transportation, and discloses a monorail hoist yard unattended system and method.The monorail hoist yard unattended system comprises a multi-section container type mine car, a special lifting appliance, a hook picking and hooking device, a precise positioning car arrester, a righting mechanism and a car pusher, and the special lifting appliance can grab or release the container type mine car; the unhooking and hooking device is used for automatically connecting or separating the front section and the rear section of the container type mine car, the precise positioning car arrester is used for adjusting the position before the front section and the rear section of the container type mine car are separated, and the righting mechanism is used for righting the container type mine car when the special lifting appliance releases the container type mine car. The center of the container type mine car is kept consistent with the centralizing center of the centralizing mechanism, and the car pusher is used for pushing the container type mine car to a designated area. According to the invention, the effects of automation, unmanned operation and less manpower in the single-rail crane conveying process can be realized, the conveying efficiency is improved, and the traditional material distribution mode is thoroughly changed.

The utility model relates to the technical field of cranes, in particular to a shipbuilding portal crane, which is characterized in that during hoisting, after a worker operates a hoisting component to hoist a workpiece, a moving component is matched with a sliding rail, so that the moving component drives the hoisting component to move left and right, and the left and right hoisting of the workpiece is further realized; the flexibility is improved; comprising moving trolleys, supports, a cross beam, a sliding rail and strip-shaped openings, two moving trolleys are arranged at the bottom end of each support, the cross beam is arranged between the two supports, the cross beam is provided with a set of strip-shaped openings, the sliding rail is arranged at the top end of the cross beam, the moving assembly is arranged on the sliding rail in a sliding mode, and the lifting assembly is installed on the moving assembly.

The invention relates to the technical field of wafer processing equipment, and provides a crown block lifting device and a crown block system.The crown block lifting device comprises a mounting bottom plate, a movable track, a lifting mechanism and a limiting assembly, the movable track comprises a movable track profile and a track bottom plate, and the movable track profile is used for being in butt joint with an upper-layer fixed track of a maintenance area; the lifting mechanism comprises a lifting belt and a lifting driving assembly; the lifting driving assembly is used for driving the lifting belt to drive the movable track to lift; the limiting assembly comprises a plug pin mechanism and a limiting column, the limiting column is fixed to the mounting bottom plate, a through hole suitable for the limiting column to penetrate through is formed in the rail bottom plate, when the movable rail profile is in butt joint with the upper-layer fixed rail, the limiting column penetrates through the through hole, and a plug pin of the plug pin mechanism is matched with a plug pin base mounted on the rail bottom plate to limit the movable rail. The butt joint precision and stability of the movable track and the upper layer fixed track can be improved, the reliability is higher, and the equipment cost is lower.

A duplex winding drum lifting electric hoist comprises a supporting plate, a walking mechanism is fixed to the upper end of the supporting plate and assembled on an I-shaped steel rail, a supporting frame is fixed to the lower end of the supporting plate, and a first lifting winding drum and a second lifting winding drum are fixed to the supporting frame. A lifting motor and a speed reducer are assembled at the two ends of the first lifting winding drum and the two ends of the second lifting winding drum respectively, a first gear is fixed to the middle of the first lifting winding drum, a second gear coaxial with the second lifting winding drum is fixed to the middle of the second lifting winding drum, and the first gear and the second gear are meshed with each other. A lifting hook is arranged below the supporting frame, a movable pulley block is assembled at the upper end of the lifting hook, a steel wire rope is arranged between the movable pulley block and the first lifting drum and the second lifting drum, one end of the steel wire rope is connected to the first lifting drum, and the other end of the steel wire rope bypasses the movable pulley block to be connected to the second lifting drum. The device is simple in structure and convenient to use.

The invention belongs to the technical field of cranes, and particularly relates to a compact low-clearance anti-swing crane and an anti-swing method. The device comprises a door frame; a hoist frame; a reel; a transverse driving motor; the hoisting mechanism is in transmission connection with the reel through a steel wire rope; the two groups of upper lifting pulley blocks are mounted on the hoisting frame and are arranged in parallel along the axis direction of the winding drum; the two lower lifting pulley blocks are installed on the lifting mechanism and arranged in parallel in the axis direction of the winding drum. The rotating center line of the upper lifting pulley block and the rotating center of the roller are located on the same plane. And the rotating center line of the lower lifting pulley block is lower than that of the lifting mechanism. The driving motor is transversely arranged, power is transmitted to the winding drum through the gearbox, meanwhile, the static size in the vertical direction is further reduced through the arrangement of the upper and lower pulley blocks with the low gravity center and the design of the lifting hook assembly with the high gravity center, and therefore under the given workshop clearance height, the working efficiency is improved. And the vast majority of vertical space is released to an effective cargo lifting stroke.

The utility model discloses a self-powered monorail crane for tunnels, the crane comprises a traveling trolley, a traveling mechanism for driving the traveling trolley to move is installed on the traveling trolley, an electric hoist is fixedly connected to the bottom of the traveling trolley, a connecting rod is also fixedly connected to the traveling trolley, the connecting rod extends to the outside of the traveling trolley, and an auxiliary trolley is fixedly connected to the end of the connecting rod away from the traveling trolley, a traveling device is installed on the auxiliary trolley, and a battery is installed at the bottom of the auxiliary trolley, and the battery is used to supply power to the traveling mechanism and the electric hoist. By installing a connecting rod on the traveling trolley so as to facilitate the installation of the auxiliary trolley through the connecting rod, and installing a battery on the auxiliary trolley so as to facilitate the power supply to the traveling trolley and the electric hoist through the battery, the installation of busbars and corresponding equipment is reduced, the trouble of construction operation is reduced, and the work efficiency is improved.

The invention provides a lifting sling balance control method, which comprises the following steps of: detecting the actual distance from two ends of a traveling cart mechanism to a cart traveling track in real time through a first sensor, comparing the actual distance with a reference distance in real time, and further judging whether the sling is in a horizontal state in real time; as the two ends of the traveling cart mechanism abut against the cart traveling track, a first difference value and a second difference value between the actual distance and the reference distance are calculated respectively, and the first difference value and the second difference value correspond to the difference value between the actual distance between the two ends of the traveling cart mechanism and the cart traveling track and the reference distance respectively. The inclination state of the lifting appliance is judged by judging whether the first difference value and the second difference value are equal or not and judging the sizes of the first difference value and the second difference value, then the offset distance of the lifting appliance is detected through the second sensor, the steel wire rope is wound and unwound through the lifting mechanism till the two ends of the lifting appliance recover the horizontal state, and therefore safety and stability in the lifting appliance operation process are guaranteed.

The invention relates to the technical field of hoisting equipment, and particularly discloses a kiloton assembly type module hoisting machine which comprises a main beam, supporting legs are fixedly installed at the two ends of the main beam, a running mechanism is slidably connected to the upper surface of the main beam, a winding drum is arranged on the outer surface of the running mechanism, and a steel wire rope is wound on the outer surface of the winding drum. The swinging amplitude of the assembly type module during hoisting is reduced through the buffer assembly, stable multi-point supporting can be conducted on the top end of the assembly type module through the hoisting assembly, the uniformity of the supporting force is guaranteed, displacement of the assembly type module can be found in time, the module can be rapidly adjusted, and the assembly type module can be conveniently and rapidly hoisted. And in addition, when the assembly type module collides or makes contact with other equipment, the guide buffering effect can be achieved, meanwhile, the clamping force on the assembly type module can be increased in the collision process, and the stability of the module in the collision process is improved.

A five-degree-of-freedom zero-gravity simulation suspension device for a space complex unfolding track belongs to the technical field of space mechanism zero-gravity simulation unfolding and mainly comprises a rocker arm frame mounting plate, a rocker arm frame assembly, a spring suspension assembly, a guide rail fine adjustment assembly, a movable constant-force suspension assembly and a mass center point connecting assembly. Wherein the guide rail fine adjustment assembly is used for adjusting the levelness of a guide rail in the movable constant-force hanging assembly. During installation, the rocker arm frame assembly is installed on the rocker arm frame installation plate through screws, the three spring hanging assemblies are installed on the rocker arm frame through the rocker arm frame embracing rings, the movable constant-force hanging assembly is installed on the rocker arm frame through the three guide rail fine adjustment assemblies, and the mass center point connecting assembly is installed on the movable constant-force hanging assembly through the spring buckles. According to the invention, the movable constant-force hanging assembly is added to realize gravity follow-up unloading in the vertical direction, and the mass center connecting assembly containing the spherical hinge assembly is superposed for use, so that the zero-gravity unfolding test requirement of a complex mechanism with five-degree-of-freedom unfolding in space can be met.

The invention relates to the technical field of cable hoisting, in particular to a cable hoisting circulating traction system and cable hoisting equipment, a first anchor, a second anchor, a first cable bent tower and a second cable bent tower are arranged on a first shore and a second shore respectively, a crown block device is slidably arranged on a bearing cable, one end of the bearing cable is anchored with the first anchor, and the other end of the bearing cable is anchored with the second anchor. The other end is anchored with the second anchor through the first cable bent tower and the second cable bent tower in sequence; the traction device comprises a traction driving mechanism and a traction cable, the first end of the traction cable is connected with the first anchor through the first anchor, the first cable bent tower and the first end of the crown block device, and the second end of the traction cable is connected with the second anchor through the first anchor, the first cable bent tower, the second cable bent tower, the second anchor and the second end of the crown block device; the traction driving mechanism can drive the crown block device to slide along the bearing cable through the traction cable. The single traction rope circulates to pull the crown block device to move back and forth, and the safety risk of forced opposite pulling caused by unsmooth command signals when traction is conducted on the two banks at the same time is overcome.

The utility model relates to the technical field of the photovoltaic industry, in particular to a photovoltaic panel hoisting device which comprises a supporting frame, a threaded rod, a driving motor, a guide rod, a sliding block, a hoisting disc, a winch, a steel wire rope, a hoisting mechanism, a bottom plate, universal wheels and a balancing weight. When the photovoltaic panel fixing device is used, the bottom end of a photovoltaic panel is placed in the bearing seat, the clamping and fixing plate moves in the bearing seat by rotating the screw rod, the bottom of the photovoltaic panel is pressed and fixed, and then the positive and negative tooth screw rod is rotated by the hand wheel to enable the two sliding blocks in threaded connection with the positive and negative teeth of the positive and negative tooth screw rod to move oppositely or reversely. According to the photovoltaic panel hoisting device, the two clamping plates are arranged to drive the two clamping plates to move, the edges of the two sides of the photovoltaic panel are clamped and fixed through the two clamping plates, so that the photovoltaic panel is fixed, the photovoltaic panel has good stability in the hoisting process, lateral deviation of the photovoltaic panel can be prevented, and safety accidents are avoided.

The utility model provides a stable lifting appliance for an automobile welding production line. The stable lifting appliance for the automobile welding production line comprises two bases and a lifting device, the supporting frame is fixedly mounted at the tops of the two bases; the threaded rod is rotationally mounted on the supporting frame; the motor box is fixedly installed on the supporting frame, a servo motor is installed in the motor box, and an output shaft of the servo motor is fixedly connected with the threaded rod; and the two sliding blocks are arranged on the threaded rod in a threaded and sleeving manner. The stable lifting appliance for the automobile welding production line, provided by the utility model, has the advantages that the stability is relatively high due to relatively small shaking generated when automobile accessories are lifted and put down, and meanwhile, the flexibility is relatively high and the transfer is convenient.

The invention relates to an OHT trolley with a side edge clamping function, and belongs to the technical field of battery production, the OHT trolley comprises a trolley body, a driving assembly is arranged at the top of the trolley body, the driving assembly is used for hanging the trolley body on an air track and driving the trolley body to move along the air track, a lifting assembly is arranged in the trolley body, and the lifting assembly is connected with a lifting seat; the lifting assembly controls the lifting base to ascend and descend, the lifting base is provided with a grabbing groove, the size of the grabbing groove is larger than that of a tray, the grabbing groove is formed in the width direction of the aerial track in a penetrating mode, and two clamping jaws are arranged in the lifting base, located in the grabbing groove and arranged in the length direction of the aerial track. Transverse supporting plates are arranged at the bottoms of the opposite sides of the two clamping jaws correspondingly, and a clamping and holding assembly used for controlling the two clamping jaws to move relatively is arranged on the lifting base. The device has the effects that the multiple trays can be stably grabbed, and air transportation can be conducted.

The invention provides a hoisting device for construction engineering, and belongs to the technical field of hoisting equipment, the hoisting device comprises a frame body, a hoisting mechanism and a clamping mechanism, the clamping mechanism comprises a hanging bracket and a clamping assembly, the hanging bracket is connected with the hoisting mechanism, the clamping assembly is arranged on the hanging bracket, and the clamping assembly comprises a first motor, a bidirectional screw rod, a synchronous pulley mechanism and a moving block; the first motor is fixedly installed on the hanging bracket, the two-way lead screws are symmetrically arranged on the two sides of the first motor and connected to the output end of the first motor through synchronous belt wheel mechanisms, the moving blocks are provided with threaded holes and sliding grooves, the two ends, in different rotating directions, of the two-way lead screws are connected with the moving blocks in a rotating mode through the threaded holes respectively, and the moving blocks are arranged on the hanging bracket in a sliding mode. When the hoisting device is used, inclination and movement of a heavy object in the hoisting process are reduced, the efficiency and safety of the whole process are improved, through the four steel ropes in the winch system, the heavy object can be more stable in the moving process, stress of each steel rope is reduced, and the service life of the steel ropes is prolonged.

The invention belongs to the technical field of crane equipment, and discloses a cable crane for bridge safety construction, which is technically characterized by comprising a cross beam, support plates are fixedly mounted at two ends of the cross beam respectively, a bearing block is slidably mounted on the surface of the cross beam, and a crane is fixedly mounted on the surface of the bearing block. The output end of the crane is connected with a cable, a first protection mechanism matched with the cable is arranged in the bearing block and comprises a protection ring, a first positioning assembly and a first adjusting assembly, and a second protection mechanism is arranged on the side wall of the supporting plate. The second protection mechanism comprises a damping spring, a second positioning assembly and a second adjusting assembly, and the problems that an existing cable crane is lack of necessary protection measures, the hoisted goods can drive the cable to swing towards the periphery under the inertia effect, and the stability is poor when the cable hoists the goods are solved.

The invention discloses a device and a method for detecting wrong winding of a crane winding drum steel wire rope, and relates to the technical field of cranes. The device comprises a mounting platform, a control end is arranged at the bottom of the mounting platform, a sliding groove is formed in the top of the mounting platform, a moving motor is fixedly mounted in the sliding groove, and a threaded rod is rotationally connected into the sliding groove. When the lifting motor is started to drive the rotating shaft and the winding drum to rotate to wind or unwind the steel wire ropes to drive the lifting hook to ascend and descend, the winding motor can be started to drive the rotating rod and the unwinding roller to rotate, so that the lifting block and the lifting hook ascend and descend synchronously; when the lifting hook is lifted, a signal can be sent to the output end through cooperation of the extrusion plate, the compression spring, the sensor and other assemblies, an operator is reminded to stop lifting of the lifting hook and drive a lifted object to descend slowly, operation is conducted after the lifted object is stable, and safety is effectively improved.