1406 results about "Block and tackle" patented technology

The invention relates to the technical field of crane equipment health monitoring, in particular to a crane running state health monitoring system and method. A sensing data acquisition unit is used for acquiring a winding drum vibration harmonic component, a steel wire rope leakage magnetic field gradient and a pulley block real-time load; the data analysis unit performs rotating speed synchronous variational mode decomposition on the vibration component to extract resonance characteristics, performs temperature and stress double-compensation correction on a leakage magnetic field gradient, quantifies an energy entropy attenuation rate through wavelet packet decomposition, constructs a phase difference model of a load and vibration to output a slip risk phase offset, calculates a load spectrum damage cumulant, and calculates a load spectrum damage cumulant; and after the four heterogeneous features are fused, a residual life coefficient is output through a dual-channel convolution-long and short-term memory hybrid neural network, and an execution unit triggers crane speed reduction control when the residual life coefficient is lower than a threshold value, so that the problems of insufficient multi-source data fusion and lack of dynamic compensation in the traditional technology are solved, and the fault early warning accuracy is improved.

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 invention discloses a hydraulic lifting container gantry crane which comprises a gantry crane main beam, a movable trolley frame is arranged on the gantry crane main beam, two trolley wheel sets in rolling contact with the gantry crane main beam are installed on each of the left side and the right side of the bottom of the trolley frame, and a container lifting appliance is arranged below the trolley frame. Through the driving of the hydraulic cylinder and the design of the pulley blocks, the distance from the lifting point of the lifting appliance to the highest point of the crane is reduced to be less than or equal to 3.2 m, under the safety distance of 8.3 m clearance, the lifting height of 5000 mm can still be realized, the problem of low clearance scene pain points is solved, when the workshop clearance is relatively high, four movable pulley blocks are selected, and when the workshop clearance is only 8.3 m, a container with the full load of 20 feet needs to be carried. The lifting requirement can be met by switching to six movable pulley sets, the whole lifting mechanism does not need to be replaced, the gantry crane is suitable for carrying scenes of containers with different clearances and different specifications, and the flexibility of the gantry crane is far better than that of a traditional winch type gantry crane.

The utility model provides a lifting device for a tower crane. The lifting device comprises a mounting seat, a bracket, a hanging bracket and a steel wire rope, the mounting seat is fixed to the top of a cabin, the support is mounted on the mounting seat, and the hanging bracket is arranged at the top of the support and provided with the hoisting pulley block. A lifting pulley block is arranged at the rear end of the on-tower crane, and when the on-tower crane is vertically arranged, the lifting pulley block and the hoisting pulley block are oppositely arranged; the hoisting pulley block comprises at least one hoisting pulley which is coaxially arranged, and the lifting pulley block comprises at least one lifting pulley which is coaxially arranged; a guide pulley block is arranged on a suspension arm of the on-tower crane; when the on-tower crane is lifted, one end of the steel wire rope is fixed on the on-tower crane or the hanging bracket, and the other end of the steel wire rope penetrates through the lifting pulley block, the hoisting pulley block and the guide pulley block and then is connected to a power unit arranged below the fan tower; the power unit tightens the steel wire rope to lift the on-tower crane.

The invention discloses a stretched noodle machine which comprises a support, a charging barrel, a die, a guide column, a pressing plate, a lever, a pulley block and a traction mechanism, the charging barrel and the guide column which is located above the charging barrel and can slide are arranged on the support, the pressing plate matched with the charging barrel is arranged at the lower end of the guide column, the die is arranged at the lower end of the charging barrel, the lever is rotationally arranged on the support, and the pulley block is arranged on the lever. The rear end of the lever is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the guide column, the distance between the rotating point of the lever and the rear end of the lever is smaller than that between the rotating point of the lever and the front end of the lever, a movable pulley block of the pulley block is arranged at the front end of the lever, and a fixed pulley block of the pulley block is arranged on the support. Compared with the prior art, the steel wire rope traction device has the advantages that the overall weight is light, the adaptability is good, and the production cost is low.

The invention relates to a ground test gravity unloading device for simulating a space microgravity environment. A base is fixedly arranged at the bottom of a fixed frame; a suspension system is arranged above the base and comprises a fixed pulley block mounted on the fixed frame, a pull rope is wound on the fixed pulley block, the bottom of one end of the pull rope is connected with a dynamometer through a tension spring, and the bottom of the other end of the pull rope is wound on a winch mounted on the base; the hoisting system comprises an external excitation device which is suspended right above the detected object; the displacement sensing system comprises a displacement sensor. The device is simple in principle and construction mode, has a relatively ideal controlled unloading mode, has the test advantage of controllable fine adjustment, is mainly used for simulating a space micro-vibration / microgravity environment to carry out a ground test, reproduces a space environment on the ground to the greatest extent so as to verify the functions and performance of a spacecraft and components thereof, and has a wide application prospect. For example, whether the vibration isolator can work reliably on orbit is verified, so that the on-orbit risk is remarkably reduced, the research and development cycle is shortened, and huge cost is saved.

To provide a rope entanglement prevention device that is able to stably operate a grab bucket by preventing entanglement of a rope for operating the grab bucket, and to provide a method for using the grab bucket using the rope entanglement prevention device.SOLUTION: A rope entanglement prevention device 1 includes: shafts 21, 31 attached on an upper block in a state where an axis is directed in a horizontal direction; frames 22, 32 capable of swinging about the shaft 21, 31 in one direction and the other direction of an extending direction; front sheaves 23, 33 provided at respective first ends of the frames 22, 32 in the one direction and around which a first rope is wound on sides of outer peripheral portions of the front sheaves in the one direction; and rear sheaves 24, 34 provided at second ends of the frames 22, 32 in the other direction and around which a second rope is wound on sides of outer peripheral portions of the rear sheaves in the other direction.SELECTED DRAWING: Figure 5

The invention discloses a rope-driven mechanical arm system for a loading and unloading scene and a control method and a simulation test method of the rope-driven mechanical arm system. The rope-driven mechanical arm system comprises a mechanical arm body, a shoulder movement part, an elbow movement part and a wrist movement part, wherein the shoulder movement part, the elbow movement part and the wrist movement part are sequentially connected from the near end to the far end; the driving assembly is used for driving the shoulder movement part, the elbow movement part and the wrist movement part; the motion transmission assembly comprises a plurality of flexible ropes and a pulley block unit, the pulley block unit comprises a first pulley block and a second pulley block, the plurality of flexible ropes comprise an excitation rope and an antagonism rope, and the excitation rope and the antagonism rope extend or retract when rotating along with the motion part; the extension or shortening distance of the excitation rope is consistent with the shortening or extension distance of the antagonism rope; and the control assembly is used for controlling the driving assembly to drive the mechanical arm body to achieve the expected movement track. The problems of joint return stroke errors and low tail end positioning precision of the rope-driven mechanical arm in actual operation can be solved.

The utility model discloses a supporting leg device for engineering machinery and the engineering machinery, the supporting leg device comprises a horizontal supporting leg assembly, the horizontal supporting leg assembly comprises a first supporting leg, a second supporting leg and a third supporting leg which are distributed in the horizontal direction, the first supporting leg can be transversely and movably embedded in a bottom frame of the engineering equipment, and the second supporting leg can be transversely and movably embedded in a bottom frame of the engineering equipment; the second supporting leg is nested in the first supporting leg in a transverse moving manner, and the third supporting leg is nested in the second supporting leg in a transverse moving manner; the vertical supporting leg assembly is vertically and telescopically arranged on the third supporting leg; the horizontal hydraulic cylinder is in driving connection with the first supporting leg; the first pulley assembly is used for pulling the second supporting leg to extend or retract relative to the first supporting leg; and the second pulley assembly is used for pulling the third supporting leg to extend or retract relative to the second supporting leg. The supporting leg device for the engineering machinery has the advantages of being simple in structure, low in control difficulty and low in cost.

A resistance pulley structure includes a symmetrical stay cord assembly, a transmission assembly, a resistance assembly and driving parts. The stay cord assembly includes a stay cord, a first and a second fixed pulley block and a movable pulley block. The movable pulley block includes a left and right movable pulleys, and the second fixed pulley block includes a second left fixed pulley and a second right fixed pulley. The rotation direction of the second fixed pulley block is parallel to the rotation direction of the first fixed pulley. After the stay cord bypasses the first fixed pulley, two ends bypass the left and right movable pulley respectively, then bypass the second left fixed pulley and the second right fixed pulley respectively, and connected to the driving parts.

The invention relates to the technical field of offshore pipeline body construction, and discloses a structure for preventing pipeline rotation during pipeline laying and a construction method.The structure comprises a pipeline launching frame used for launching a pipeline body and a rail piece arranged above the pipeline launching frame, and a plurality of fixed portal frames are arranged at the top of the pipeline launching frame; the inner wall of the fixed portal frame is connected with the top of the rail piece, a plurality of slidable pulley blocks are installed on the rail piece, anchor chains are connected to the bottoms of the pulley blocks, the bottom ends of the anchor chains are connected to the top of the pipeline body, and a plurality of buoys are installed on the surface of the pipeline body. According to the structure for preventing the pipeline from rotating in the pipeline laying process and the construction method, when the pipeline body slides down along the rail piece, rotation of the pipeline body is restrained through constraint of the anchor chain and the pulley block; the buoyancy balance provided by the buoy and the symmetrical sacrificial anode protection blocks on the two sides are used for balancing the gravitational torque after the pipeline body enters the sea, and rotation of the pipeline body is restrained.

The utility model relates to a lifting appliance capable of adjusting the balance of a bridge deck slab, which comprises a lifting beam, a plurality of fixed pulleys and a movable pulley, steel wire ropes are fixedly mounted on two sides of the top of the lifting beam, positioning holes for mounting the fixed pulleys are uniformly formed in a slab body of the lifting beam, and the fixed pulleys are mounted in the lifting beam. The fixed pulley is in transmission connection with a movable pulley through a traction rope; a lifting hook is hung on the movable pulley. According to the utility model, the pulley block is arranged in the lifting beam and is used for balancing the stress of the bridge deck slab, so that each lifting position is uniformly stressed, the bridge deck slab can be prevented from inclining after the stress of the bridge deck slab is balanced, the risk that a steel wire rope at a certain lifting position is snapped is also prevented, and the occurrence of safety accidents is prevented; therefore, the bridge deck slab prefabricated part can be better hoisted and conveyed.

The utility model relates to the technical field of railway catenary erection, and discloses a catenary carrier cable erection auxiliary tool which comprises a hoop used for being connected with a flat cantilever of a catenary in a clamped mode, an inverted L-shaped supporting arm fixedly connected to the top of the hoop and a pulley assembly hung on the supporting arm. The pulley assembly is positioned obliquely above a carrier cable seat on the flat cantilever; the pulley assembly comprises a wheel frame, a hook fixedly connected to the top of the wheel frame and a pulley rotationally connected to the lower portion of the inner side of the wheel frame, a notch is formed in the wheel frame, the pulley is lower than the notch, the carrier cable is erected on the pulley, and the hook is hung on the top of the supporting arm. When being used for mounting the carrier cable, the carrier cable does not need to bypass the end part of the flat cantilever from the lower part of the flat cantilever and then is mounted on the carrier cable seat, so that the moving distance of the carrier cable during mounting can be greatly shortened, and the carrier cable is more convenient and more labor-saving to mount.

The application relates to a compression-shear composite loading system based on a pulley system multi-point mean loading, and relates to a compression-shear composite loading system. In order to solve the problem that the traditional compression-shear composite loading is prone to uneven shear flow for a large-size composite stiffened wall plate structure, the application applies uniform compression loads to the side end surface loading end of a test piece through compression actuating cylinders and a flat pressing plate; two shear actuating cylinders output leftward shear loads along the upper end surface of the test piece; and the other two shear actuating cylinders output rightward shear loads along the lower end surface of the test piece; the loads are converted in direction through a pulley assembly and finally act on the shear plates on the upper and lower sides of the test piece. The application realizes the test under different compression-shear ratios by simultaneously adjusting the sizes of the compression and shear actuating cylinder forces, and optimizes the problem of uneven shear loading through the multi-point coordinated loading system, so that the shear of the measuring point is uniform, and the strength test of the large-size stiffened wall plate structure can be better satisfied.

The utility model discloses an anti-abrasion device for a steel wire rope, and relates to the technical field of mechanical traction equipment. The device comprises a supporting seat, two threading assemblies used for guiding a steel wire rope are arranged on the supporting base. An annular groove is formed in the supporting seat; the threading assembly is in sliding connection with the annular groove through a connecting piece. The two threading assemblies are rotationally symmetrical about the center of the annular groove; the threading assembly comprises threading pipes correspondingly arranged outside the annular groove in the radial direction. Pulley blocks are respectively arranged at two ends in the threading pipe; the pulley block comprises two guide pulleys which are vertically arranged at an interval; the guide pulley is rotationally connected in the threading pipe; the axial direction of the guide pulley is parallel to the tangential direction of the annular groove; the threading pipe is further provided with a positioning piece used for locking the threading pipe and the supporting base. The steel wire rope guiding device has the advantages that the guiding direction of the steel wire rope can be flexibly adjusted, and the friction weakening effect on the steel wire rope is better guaranteed.

A lifting assist device suitable for a calendering apparatus. When a foot pedal (2) is depressed, a movable pulley block and a pawl block (10) rise and drive a ratchet wheel (5) to rotate, and the ratchet wheel (5) drives a handwheel to rotate; when the foot pedal (2) is released, movable pulleys (8) and the pawl block (10) descend relative to the ratchet wheel (5) under the action of gravity, and the pawl block (10) is reset. By repeatedly depressing and releasing the foot pedal (2), a glass calender can be continuously lifted. When the glass calender is lifted into position, the lifting assist device is removed, operations such as inspection, maintenance and adjustment are performed, and finally the handwheel is rotated to lower the glass calender. Since the force of the human leg is several times that of the arm and the pulley block is used in conjunction, using the lifting assist device to drive the handwheel is much easier than rotating the handwheel by hand directly. The present invention can effectively solve the problem that current manual lifting of glass calenders is time-consuming and labor-intensive, thereby reducing the operational difficulty, increasing the lifting speed, and avoiding issues such as device failures and glass sticking to rollers caused by excessive accumulation of glass debris, and injuries resulting from improper operation.

The utility model provides a height-adjustable pulley assembly which comprises a base and pulleys connected to the two sides of the base, an adjusting seat is arranged on the inner side of the base, an adjusting block and a sliding block are arranged in the adjusting seat, the adjusting block is connected with an adjusting lead screw, the two ends of the adjusting lead screw penetrate through the adjusting seat and the sliding block respectively, and kidney-shaped holes are formed in the sliding block. The adjusting base is provided with a kidney-shaped hole, a positioning rod is arranged in the kidney-shaped hole in a penetrating mode, the two ends of the positioning rod sequentially penetrate through the adjusting base and the base from inside to outside respectively, the adjusting block and the sliding block are arranged in an inclined mode, and the sliding block axially translates when the adjusting block transversely moves through the adjusting lead screw. The height of the pulley can be flexibly adjusted, the using performance of the pulley assembly is improved, the adjusting block is driven by the adjusting lead screw in threaded connection to transversely move, the sliding block is made to axially translate, accurate adjustment of the height of the pulley is achieved, and the problems that the inner shell inclines and screws are clamped due to friction force are solved.

This invention provides a static weight-based multi-dimensional force sensor calibration device, comprising: a worktable, a force reversing mechanism, a rotating platform, a loading disk, and a loading assembly; the rotation center of the rotating platform is perpendicular to the rotation center of the force reversing mechanism; a turntable is fixed to the rotating platform, and a multi-component force sensor to be calibrated is fixed to the turntable; the loading disk is fixed to the top of the multi-component force sensor to be calibrated, and a loading connector is provided on the loading disk; a pulley assembly is provided on the top of the worktable; when calibrating the force of the multi-component force sensor to be calibrated, the line connecting the pulley assembly and the loading connector is on the central axis of the worktable; when calibrating the torque of the multi-component force sensor to be calibrated, the line connecting the pulley assembly and the loading connector is parallel to the central axis of the worktable. This device optimizes the force loading method, changing from loading each component separately to loading the resultant force through a single rope, avoiding mechanical interference during multi-dimensional loading, achieving high repeatability of force loading, and improving the accuracy and reliability of calibration results.

The invention relates to the technical field of hoisting machinery control, and provides a mast crane hoisting pulley block limiting control method and system. The method comprises the steps that limiting collision blocks are installed at the lifting final position and the lowest position of a mast crane lifting pulley block respectively, limiting sensing devices are installed at key nodes, corresponding to the limiting collision blocks, of the pulley block, and the limiting sensing devices are used for sensing position signals of the limiting collision blocks; the feedback control module continuously monitors a contact signal of the limiting induction device, if the limiting induction device continuously keeps the contact state for preset time in the slow stop process, the feedback control module sends an automatic stop instruction to the PLC control system, and the PLC control system controls the lifting pulley block to stop running; the induction signal of the limiting induction device is linked with the PLC control system, so that early warning, slow stop protection and automatic stop control of the lifting pulley block when the lifting pulley block is excessively lifted or descended are realized.

The invention relates to a system (1) for hoisting a load (C), in particular for hoisting a load (C) in the presence of a relative movement due to surges. The hoisting system (1) comprises at least one hoisting point (1a) having a frame (2) comprising:-controllable braking means (6) cooperating with the group of movable pulleys (52), and-manipulating means (8) cooperating with the group of movable pulleys (52) and configured to be able to restore the potential energy of the movable pulleys (52) in order to tend to increase said distance value (D).

The utility model relates to the technical field of jacquard pulley combination devices, and discloses a textile equipment jacquard pulley combination device which comprises two support plates which are oppositely arranged, the top ends and the bottom ends of the sides, close to each other, of the two support plates are both provided with installation assemblies, and the installation assemblies are arranged on the support plates. The two support plates are connected with a protection plate through a mounting assembly, a sealing groove is formed in the outer side of the protection plate, a pulley body is mounted on the close side of the protection plate, a shaft sleeve is arranged in the middle of the side wall of the pulley body in a penetrating mode, a shaft body is arranged on the side wall of the shaft sleeve in a penetrating mode, and buckles are fixedly connected to the middle ends of the close sides of the two support plates. According to the utility model, double-side clamping interlocking and thread auxiliary fastening are adopted on the connecting structure, the friction force and the interlocking tightness degree are increased, the service life of the device is prolonged, a built-in ball bearing protective sleeve is arranged on the protective structure, impurities are prevented, corrosion is avoided, transparent materials can be adopted, observation is convenient, and the protective performance is enhanced.

The utility model discloses a quick detachable pulley, including first baffle, second baffle, a plurality of first pulley assembly, a plurality of second pulley assembly, quick detach assembly, first baffle, second baffle is vertically left and right and is placed, a plurality of first pulley assembly all are from front to back array rotation connection between the lower end of first baffle and second baffle, a plurality of second pulley assembly all are from front to back array rotation connection between the upper end of first baffle and second baffle, the left side of a plurality of second pulley assembly all with the left side rotation connection of first baffle, a plurality of second pulley assembly right side and second baffle fixed connection, quick detach assembly is fixed in the top of first baffle and second baffle. The utility model has the advantages of convenient rope through pulley, and the wide use scene.

The utility model provides a kind of windproof iron wedge of flexible transmission, including rack;Driving mechanism is set on rack;Transmission mechanism, including balance wheel, fixed pulley set and transmission arm, balance wheel is rotatably set on rack, fixed pulley set is set on rack and is located the below of balance wheel, transmission arm one end is connected with balance wheel, other end is connected with the output end of driving mechanism;Wedge, by multiple connecting ropes be connected in the below of rack, the middle portion of connecting rope is passed through fixed pulley set, and its end portion is wound and fixed on balance wheel;Wherein, balance wheel includes at least two take-up radius different take-up part, when driving mechanism drives balance wheel to rotate by transmission arm, drive the connecting rope wound on different take-up part and carry out different amount take-up, to make wedge produce inclination change in lifting process.The utility model uses flexible transmission structure to replace traditional rigid link transmission, can significantly improve the reliability of windproof brake.

The utility model discloses a flour filtering and screening device which comprises a machine body support. The lower end of the discharging bin is inclined, and the discharging bin is provided with a discharging groove plate extending out of the machine body support; the pulley block is arranged at the upper end of the discharging bin and fixed to the side edge of the discharging bin through a support; the filtering and screening frame is provided with a screen and a vertical frame arranged on the screen, the vertical frame is installed on the guide rail, one end of the vertical frame is provided with a traction hook, and the guide rail is provided with a linear part and arc block parts located at the head end and the tail end; the belt motor is installed on one side of the machine body support and connected with the traction hook through a two-connecting-rod assembly to drive the filtering and screening frame to slide back and forth in a reciprocating mode. The powder discharging rolling brush is arranged on the machine body support and located at the upper end of the discharging groove plate. The belt motor drives the two-connecting-rod assembly to rotate, the filtering and screening frame is driven to transversely slide in a crank mode, and meanwhile the two ends of the guide rail are arranged in an arc mode, so that amplitude can be enlarged, flour dispersion is improved, and screening efficiency is improved.

According to the buffering control method for the berthing ball crane between the ships, a steel wire rope on a winch is output from the two sides of the winch, bypasses a buffering device and then is wound on a suspension arm on the other side of a base from one side of the base in the opposite direction, and through the cooperation of a first pulley block and a second pulley block, the steel wire rope is buffered. The steel wire rope is changed into the vertical direction from the horizontal direction and then is connected with the stopping ball in the vertical direction after bypassing the second pulley on the suspension arm, and meanwhile, the steel wire rope and the buffer device are always in a constant tension state under the action of the preset tension of the buffer device, so that the stopping ball is prevented from falling off when the stopping ball ascends or descends along with sea waves. The berthing ball can stably float on the sea surface to achieve sea wave compensation, so that the berthing stability between ships is improved, and meanwhile the situation that a steel wire rope for lifting the berthing ball is disengaged from a pulley block due to different tightness degrees caused by sea wave floating is avoided.

The invention relates to the technical field of double-spindle finish machining of low-speed motor shafts, and discloses a double-spindle finish machining production line for machining low-speed motor shafts, which comprises supporting columns, trusses are fixedly mounted at the top ends of the supporting columns, and numerical control machine tools are arranged below the trusses and located between the adjacent supporting columns. A conveying frame is arranged on one side of the numerical control machine tool; the running frame is arranged on the truss, a sliding rail matched with the bottom end of the truss is arranged on the outer surface of the truss, a pulley assembly is installed in the running frame, and a sliding way matched with the pulley assembly is arranged on the outer surface of the truss. The multiple sets of running frames are arranged on the truss, the running frames can move back and forth along the truss through the pulley assemblies, machined workpieces can be clamped through the clamping plate assemblies on the running frames, the numerical control machine tool can be replaced along the truss, workers can be replaced for replacing the workpieces, the speed of replacing the numerical control machine tool with the workpieces is increased, and therefore the machining efficiency is improved.

This invention relates to the field of shaking table testing technology and discloses an electromagnetic shock protection device suitable for large-scale shaking table tests. It includes multiple support columns spaced along the outer perimeter of the shaking table and a surrounding arresting cable net assembly. The support columns are equipped with pulley assemblies. The surrounding arresting cable net assembly includes steel cables and at least one set of electromagnetic arresting assemblies. The steel cables are wound around the pulley assemblies, and the ends of the steel cables are connected to the electromagnetic arresting assemblies. The electromagnetic arresting assemblies include a spool and a generator connected to the spool. The steel cables are connected to the spool, and the generator is electrically connected to a control device. The control device controls the damping force on the steel cables by adjusting the excitation current of the generator. This invention aims to solve the problems of existing mechanical or hydraulic arresting systems, which suffer from slow response and inability to adjust damping force in real time, resulting in a harsh shock protection process, high peak force, and potential secondary damage.

The cable-driven intelligent material sorting and conveying system comprises a lower-layer sorting device, the top end of the lower-layer sorting device communicates with an upper-layer material conveying pipe and a lower-layer material conveying pipe, and a conveying device rack component is fixedly arranged at the top end of the upper-layer material conveying pipe and the top end of the lower-layer material conveying pipe; a driven guide wheel assembly is fixedly arranged on one side of the conveying equipment rack part, a conveying equipment movable platform is rotationally arranged between the inner walls of the conveying equipment rack part, and a fixed pulley assembly and a driver part are fixedly arranged on the other side of the conveying equipment rack part. According to the cable-driven intelligent material sorting and conveying system with the double-layer layout, through cooperation of the driven guide wheel assembly, the conveying equipment movable platform, the conveying equipment rack component, the fixed pulley assembly and the driver component, compared with a rigid robot, the movement inertia is reduced, an end effector can run at a high speed, and the cable-driven intelligent material sorting and conveying system has the beneficial effects of being high in speed increasing speed and high in efficiency. And the speed is high.

The present application relates to the technical field of ship unloading equipment, and discloses a lifting device and a ship unloader, wherein the lifting device comprises: a rack, one side of which is provided with a stand; a cantilever frame, one end of which is slidably arranged on the stand; a material taking mechanism, which is arranged on the cantilever frame and is used for taking material; a lifting mechanism, which comprises a lifting traction rope, a lifting pulley assembly and a lifting driving unit; the lifting driving unit is fixed on the side of the rack far from the cantilever frame; the two ends of the lifting traction rope are connected with the cantilever frame and the lifting driving unit through the lifting pulley assembly; a counterweight mechanism, which comprises a counterweight traction rope, a counterweight pulley assembly and a counterweight piece; the counterweight piece is located on the side of the rack far from the cantilever frame; the two ends of the counterweight traction rope are connected with the cantilever frame and the counterweight piece through the counterweight pulley assembly. The lifting mechanism drives the cantilever frame and the material taking mechanism to lift at the same time, the lifting mode is simple, the material taking mechanism is convenient for digging different height materials, and the working efficiency of the material taking mechanism is improved.

This application discloses a retraction device, relating to the field of fully mechanized coal mining technology. The device includes: a main support; and a retraction assembly, which is located inside the main support. The retraction assembly includes an outer frame, a hydraulic cylinder, and a traction rope. This application replaces the traditional long wire rope traction of a winch with a short-distance traction rope driven by a hydraulic cylinder. Combined with a pulley block structure and a closed outer frame design, it significantly shortens the exposed section of the wire rope. Coupled with the overload protection mechanism of the pressure relief valve, it reduces the scope of rope breakage accidents from the source, lowering the risk of injury from slippage caused by wire rope breakage. Simultaneously, it enables single-person remote control operation using a remote control component, eliminating the high-intensity labor of multiple workers repeatedly carrying long wire ropes. Furthermore, the closed structure of the device allows for parallel operation at adjacent workstations, significantly improving the continuity and overall efficiency of retraction, and is particularly suitable for the safe and efficient retraction needs of heavy supports under complex roof pressure conditions.