376 results about "Traveling block" patented technology

The invention discloses a disassembly-free top drive drilling device pulley and guide rail system, relates to the field of petroleum drilling engineering, and solves the problems that a top drive drilling device is too long in assembly and disassembly time and too high in safety risk when applied to a telescopic derrick drilling machine. The derrick is divided into an upper derrick section and a lower derrick section; the slide rail comprises an upper slide rail section and a lower slide rail section; the upper-section sliding rail and the lower-section sliding rail are hooked through a hook; an upper-section sliding rail and a lower-section sliding rail are respectively arranged on two sides of the inner sides of the derrick upper section and the derrick lower section; two ends of the pulley are in contact with the upper-section slide rail and the lower-section slide rail; the working surfaces of the upper-section sliding rail and the lower-section sliding rail in contact with the tackle are on the same plane to form a tackle guide channel; the middle of the pulley is connected with a top drive; the top drive is hung below the traveling block and moves up and down along with the traveling block. According to the disassembly-free top drive well drilling device pulley and guide rail system, the assembly and disassembly time is saved, the danger in the assembly and disassembly process is reduced, and the well drilling efficiency and the construction quality are improved.

The invention discloses electric-drive automatic workover operation equipment for a vertical derrick. The electric-drive automatic workover operation equipment comprises a self-propelled chassis, the vertical self-balancing derrick, a traveling block guide rail, a traveling block, an electric winch, a wellhead automatic platform and a hydraulic pipe conveying machine. The self-propelled chassis is installed at the bottom of the main vehicle and provided with four stepping supporting legs, and a stepping device is arranged below each stepping supporting leg. A balance beam type crown block is mounted at the top end of the upright self-balancing derrick; the traveling block guide rail is arranged along the front side of the upright self-balancing derrick; the traveling block moves up and down along the traveling block guide rail; the wellhead automatic platform is integrated with a hydraulic clamp, a righting manipulator and an automatic hoop finder; the hydraulic pipe conveying machine adopts a horizontal-to-vertical bidirectional lifting mechanism, the vertical self-balancing derrick is configured, a loaded crown block is small in offset, the derrick is configured with a traveling block guide rail, a traveling block moves along with the guide rail and is small in wind load drift, the wellhead pipe column handover processing efficiency is high, and the time for a traveling crane system of the workover rig to participate in pipe column handover is shorter; and the overall efficiency of the automatic tubular column processing operation of the workover rig is improved.

The invention is suitable for the technical field of traveling block hook testing, and provides a testing device for a traveling block hook and a testing method thereof.The testing device comprises a mounting assembly used for providing rigid support for the whole device and a testing assembly arranged on the mounting assembly, the test assembly is used for applying a simulation load to the hook assembly of the traveling block, the detection assembly is arranged on the mounting assembly and is used for carrying out image acquisition on the hook assembly of the traveling block, and the test assembly comprises a clamping unit and a load simulation unit which are oppositely arranged from top to bottom. The clamping unit comprises a suspension oil cylinder, a first hinge structure and a fixing seat, the load simulation unit comprises a load oil cylinder and a second hinge structure, a friction effect equivalent load is introduced through an equivalent load model, the defect that the friction force of a drilling tool is neglected in an existing test is overcome, the test load better fits the actual drilling working condition, and the test efficiency is improved. The accuracy of a detection result is improved.

The invention discloses a cable laying pulley load performance test device, and belongs to the technical field of pulley performance test. The sliding rails are symmetrically arranged, the placement platform and the bottom baffle are in sliding fit, the detection assembly is located above the placement platform, the placement platform is used for bearing a tackle, the bottom baffle is used for auxiliary supporting, and the detection assembly is used for applying a vertical load. According to the pulley load performance test device for cable laying, by adjusting the relative positions of the placement platform and the bottom baffle plate on the slide rail, supporting and fixing spaces of cable pulleys with different sizes and structural forms can be flexibly adapted; the special-shaped tackle has the advantages that the special-shaped tackle is matched with the lockable sliding block and the self-centering structure, so that the technical problems that the special-shaped tackle is difficult to fix and the loading center deviates are solved, the lateral displacement or overturning of the tackle when the tackle is pressed is effectively limited, and the stability and safety of load performance detection and the accuracy of data are improved.

The utility model relates to the technical field of tunnel construction equipment, and discloses a double-layer steel bar positioning device for tunnel construction, which comprises a door-shaped frame, a plurality of arched tracks and two power components, pulley assemblies are mounted on the arched tracks, and the power components are used for driving the corresponding pulley assemblies to reciprocate along the arched tracks. The adjacent pulley assemblies are connected through a cross beam, a plurality of pairs of positioning plates are fixed to the cross beam in the extending direction of the cross beam, and two limiting rods are installed between the same pair of positioning plates. The utility model has the beneficial effects that the inner and outer reinforcing steel bars pulled to the top of the door-shaped frame are inserted into the gap between the positioning plates, then the insertion ends of the reinforcing steel bars are fixed with the anchor rods embedded into the ground, and finally the pulley assembly is started, so that when the pulley assembly moves to the other side along the arched track, the reinforcing steel bars are bent to be arc-shaped; finally, after the other end of the steel bar bent into the arc shape is fixed, positioning of the double-layer steel bar is completed, and the labor intensity of workers in the construction process is low.

The invention relates to the technical field of power transmission line construction, in particular to a power transmission line wire laying construction method which comprises the steps of dividing a wire laying section and arranging a tension field and a traction field. A paying-off tackle is hung; the second guide rope is unfolded in a one-traction-three traction unfolding mode; the traction rope is unfolded in a one-traction-one traction unfolding mode; the lead is spread in a one-traction-two traction spreading mode, and efficient and safe spreading of the six-split large-cross-section lead is achieved through the six-split large-cross-section lead spreading device.

A top drive drilling device relates to the field of petroleum drilling and comprises a drilling platform, a derrick is mounted on the drilling platform, a traveling block is assembled on the derrick, a top drive system is further movably mounted in the vertical direction of the derrick, and an adjusting component and an elevator component are further assembled on the top drive system. Secondly, by means of the elevator assembly, when the drill rod needs to be connected, the adjusting assembly can rapidly adjust the position of the elevator assembly, the drill rod is automatically checked through the driving plate arranged in the shape of the Chinese character'ba ', the two bushings are opened in a linkage mode, and when the drill rod is completely located in the bushings, the elevator assembly can automatically adjust the position of the elevator assembly; the drill rod can be locked through the dual effects of the locking disc and the pre-tightening spring, so that the elevator assembly works more stably; and the interior of the lining is gradually expanded from bottom to top, the drill rod is prevented from integrally falling down in the receiving or pulling-out process, and finally abrasion caused in the drill rod entering and exiting process can be avoided through the pin rollers.

The invention relates to the technical field of guide mechanisms, and discloses a translation mechanism which comprises two longitudinal rails parallel to each other and a tackle arranged between the two rails, and a longitudinal rolling groove is formed in the side, facing the tackle, of each rail; the pulley comprises a frame and two wheel sets arranged on the two sides of the frame respectively, the two wheel sets correspond to the two rolling grooves respectively, each wheel set comprises at least three wheels which are sequentially arranged in the longitudinal direction, the wheels are all rotationally connected with the frame, and the wheels are located in the corresponding rolling grooves respectively. When the pulley moves longitudinally, the wheels roll along the rolling grooves, and the rolling friction force is very small, so that the resistance is very small when the workbench moves, and the movement is more flexible. Even if dust enters the rolling groove, the wheel rolls in the rolling groove, so that abrasion to the edge of the wheel is very small and can be almost ignored, and the service life of the wheel is prolonged.

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 discloses a reciprocating passenger cableway suitable for indoor amusement scene, comprising: the near end steel frame and the far end steel frame of keeping preset interval, drive arrangement, install on the near end steel frame and the far end steel frame, including motor, the first transmission part and the second transmission part of motor drive and the traction belt of closed loop setting, and the traction belt is around the first transmission part and the second transmission part, the load part includes the trolley main body and the suspension basket, and the traction belt both ends fixed connection trolley main body, the load cable is fixed respectively on the near end steel frame and the far end steel frame on both ends, and the trolley main body cooperates and guides the load part moving path, replace traditional steel wire rope through the traction belt, and its elastic property can effectively absorb the vibration energy in operation, reduce the noise of metal friction and resonance generation, satisfy the low decibel mute demand of indoor amusement scene, and the drive arrangement cooperates the transmission mode of traction belt, need not special tool to dismantle replacement, shorten maintenance time, improve maintenance efficiency.

A ladder trolley includes a trolley frame having an upper end longitudinally spaced apart from a lower end. The trolley frame has longitudinally extending laterally spaced apart first and second side flanges; webbing connecting the first and second side flanges; and a ladder travel channel extending from the upper end to the lower end. The channel is defined by at least the first and second side flanges and the webbing and is open at the upper and lower ends. The ladder trolley includes at least one pair of ladder side rollers moveably connected to the trolley frame. Each pair of ladder side rollers has first and second ladder side rollers being laterally moveable and resiliently biased laterally into the channel. The ladder trolley includes a payload support connected to the trolley frame exterior to the ladder travel channel.

The utility model relates to the technical field of oil exploitation, and provides a drill floor manipulator which comprises a base, a pulley and a mechanical arm frame assembly. The pulley is slidably connected to the base. The mechanical arm frame assembly is connected with the tackle. The pulley slides on the base so as to drive the mechanical arm frame assembly to adjust the working position. The mechanical arm frame assembly can be turned over and converted between a working position and a conveying position. When the pipe supporting work needs to be carried out, the mechanical arm frame assembly is overturned to a working position, that is, the mechanical arm frame assembly is overturned to a vertical state; when the drill floor manipulator needs to be transported, the mechanical arm frame assembly is overturned to the transportation position, namely the mechanical arm frame assembly is overturned to the laying-down state, so that the transportation height is reduced, and transportation is facilitated. Therefore, the drill floor manipulator does not need to be disassembled, and the transportation cost can be greatly reduced.

This invention discloses an intelligent identification and positioning device for tension wire laying pulley skipping grooves, relating to the field of optical wave positioning technology for wire laying pulleys. It includes a pulley frame with a lifting frame fixedly installed at its top, and the pulley frame is connected to a lifting device via the lifting frame. In this intelligent identification and positioning device for tension wire laying pulley skipping grooves, all actions—guiding alignment, position locking, wire guiding, and wire clamping—are achieved by the pressure-driven spindle rotation of the traction plate. After the traction plate contacts the guide wheel, the guide wheel deflection, spindle rotation, position locking, wire guiding, and wire clamping are triggered synchronously, with no time difference or action lag between each stage, forming a closed-loop linkage of trigger-response-locking. It has no electrical control module and is unaffected by strong electromagnetic interference, high dust, or humid environments. It is particularly suitable for the complex working conditions of power transmission line construction—strong electromagnetic fields, high vibration, and no power supply—significantly improving the device's reliability.

The utility model discloses a tackle with a pulley auxiliary assembly in the technical field of tackles, the tackle with the pulley auxiliary assembly comprises a pulley and a rotating shaft, the pulley is fixedly installed on the rotating shaft, supporting plates are oppositely arranged on the rotating shaft, a fixing block is arranged between the two supporting plates, a rotating seat is arranged on the fixing block, and the pulley auxiliary assembly is arranged on the rotating seat. The utility model solves the problems that the speed reduction assembly is not arranged on the existing scenic spot tackle, the speed of tourists sliding on the mooring rope along with the tackle is higher and higher under the action of gravity, the potential safety hazard is great, and the tackle can be used for reducing the speed of the tourists due to the fact that the tackle is not provided with the speed reduction assembly. And the psychology of the tourist is greatly influenced.

The utility model relates to the technical field of bridge construction, in particular to a temporary supporting device and a bridge erecting machine. The temporary supporting device comprises a supporting component, a base and a movable pulley. The top end of the supporting component is used for being connected with a main beam of the bridge girder erection machine through bolts. The base is connected with the bottom end of the supporting component. The movable pulley is connected to the lower portion of the base. The temporary supporting device is connected with the main beam of which the tail beam section and the rear supporting leg are removed, and the movable pulley is arranged at the bottom, so that the temporary supporting device can play a role in temporary supporting, the risk of overturning in the beam feeding process is reduced, and meanwhile, the problem that the tail beam section of the main beam of the bridge girder erection machine is removed is solved. Therefore, the bridge girder erection machine cannot move longitudinally under the condition that the bridge girder erection machine is lack of rear supporting legs.

The invention discloses a self-locking type paying-off tackle which comprises a first side plate, a center pipe is fixedly installed in the middle of the first side plate, a pulley is rotatably installed on the center pipe, a groove changing sliding rod is in slidable key connection with the interior of the center pipe, a groove changing screw rod is rotatably installed in the center pipe, and the groove changing screw rod is located in the groove changing sliding rod and is in threaded connection with the groove changing sliding rod. The groove changing screw rod is connected with a driving motor, the groove changing sliding rod is fixedly connected with a second side plate, a guide rod is fixedly installed at the upper end of the second side plate, a hanging plate is rotatably installed at the upper end of the first side plate, and a fixing pin is arranged between the hanging plate and the upper end of the first side plate and used for fixing the hanging plate to be perpendicular to the first side plate. A locking assembly is installed on the second side plate, and the output end of the locking assembly abuts against the hanging plate. The groove changing screw rotates to control the guide rod to point to different wheel grooves in the pulley, so that the guide rod can conveniently guide a cable to enter different wheel grooves.

The invention relates to a ladder type elevator. The narrow surface of the outer slideway pipe is an upper surface and a lower surface, the angle iron is buckled and welded on the wide surface, and one side is flush with the upper surface. One section of slide way frame consists of two outer slide way pipes in the angle iron; four geneva wheels are arranged on two sides below the pulley frame, four flat wheels are arranged on the front side and the rear side of the pulley frame and slide along the outer slideway pipe, and a stop fork is arranged below the chassis. Two ends of the base are T-shaped, the T-shaped tail is an inner sleeve, and the electric hoist is fixed on the cross arm support. Inner sleeves are arranged at the two ends of the top sealing cross arm, a fixed pulley is arranged in the middle, sleeve joints are welded to the middle and the upper portion of an outer sliding way pipe, and sliding way frames of all sections are fixed into a whole through a wire drawing rod. And when the required height is reached, the top is sealed. The steel wire rope upwards bypasses the fixed pulley at the top end from the lower side of each section of cross arm and then forms a linkage body with the pulley from the upper side of each section of cross arm, and the ladder stand frame leans against a house, so that a switch can be conveniently operated by hands. The device has the advantages of being fast to disassemble and assemble, convenient to use, labor-saving, efficient and high in safety.

The utility model relates to a double-shield TBM telescopic hard air pipe, and belongs to the technical field of double-shield TBMs. The front-end hard air pipe is installed on the main machine, the rear-end hard air pipe is installed on the tackle, the butt-joint hard air pipe is telescopically inserted in the front-end hard air pipe, the tail end of the butt-joint hard air pipe is connected with the rear-end hard air pipe, a gap meeting the requirement for mutual swinging during steering is reserved between the butt-joint hard air pipe and the front-end hard air pipe, and the sealing rubber plate is installed at the front end of the butt-joint hard air pipe. The sealing rubber plate is in contact with the inner wall of the front-end hard air pipe to form sealing; the telescopic requirement of the air guide pipe is met through telescopic sleeving of the front-end hard air pipe and the butt-joint hard air pipe, the problems that the service life of the air guide pipe is affected due to deformation, blockage and vibration of the flexible air pipe are solved, and the problem that the flexible air pipe naturally droops is solved due to the fact that the butt-joint hard air pipe is a hard pipe; the turning requirement of the shield tunneling machine is met through the gap between the butt-joint hard air pipe and the front-end hard air pipe, the butt-joint hard air pipe and the front-end hard air pipe are sealed through the sealing rubber plate, the dust removal effect is guaranteed, and the construction efficiency is effectively improved.

The utility model relates to the technical field of rail tackles, in particular to a hanging rail tackle for a hydraulic ash removal system, which comprises a running rail and a tackle body, the tackle body comprises a frame assembly and a hanging plate; the frame assembly slides along the running track through rolling wheels and limiting wheels arranged on the frame assembly. The hanger plate is fixed below the frame assembly, and the bottom surface of the hanger plate is provided with a first clamp, a second clamp and a cable hanger. According to the hanging track tackle for the hydraulic ash removal system, the running track is hung in a hydraulic ash removal plant, water and gas rubber hoses used by ash removal equipment are respectively lapped on the first hoop and the second hoop, and a used cable is lapped on the cable hanging bracket; through an external traction mode, the frame assembly slides along the running track under the assistance of the rolling wheels and the limiting wheels, water and gas rubber hoses are conveyed to designated positions for ash removal operation, simultaneous carrying of water, gas and electricity in three paths is achieved, and the ash removal efficiency is improved.

This invention provides an integrated protective hoisting device for a bridge erecting machine, comprising winches located at the left and right ends of the lower part of the second outrigger, a steel wire rope wound around the winches, a first single-wheel pulley located on the second outrigger, rope fixing frames respectively installed on both sides of the lower part of the third outrigger, and a protective rope connected to the rope fixing frames. The integrated protective hoisting device has two working states: a protective state and a hoisting state. This invention provides an integrated protective hoisting structure for a bridge erecting machine, using the protective rope as a guardrail. During installation, workers only need to provide traction, and the winches tighten the protective rope to form a temporary guardrail. This can replace the need for moving and installing temporary guardrails, providing edge protection for the bridge deck between the second and third outriggers of the bridge erecting machine, ensuring the safety of personnel on it. Simultaneously, the combination of the steel wire rope, winches, and the first single-wheel pulley can also be used to hoist objects on the bridge, realizing the dual function of this device.

The invention relates to the technical field of overhead lines, and particularly discloses an overhead line stringing sag confirmation device based on tension change characteristics, which comprises a pulley fixing assembly arranged at a wire cross arm of a tower; one end of the wire tightening execution assembly is connected with the tackle fixing assembly, and the wire tightening execution assembly comprises a clamping piece connected with an overhead line wire and a force transmission piece matched with the tackle fixing assembly; the sensing monitoring assembly is connected in series in a connecting path of the clamping piece and the wire and is used for acquiring a tension parameter of the wire, through a non-optical monitoring mode of tension sensing and data conversion, the dependence on an environment view field is eliminated, and accurate confirmation is realized in combination with a sag conversion function of a handheld terminal; the technical blank of sag monitoring under severe working conditions is filled, and the long-term construction precision problem of the industry is effectively solved.

The invention relates to a hook block for a crane for lifting a load by means of a crane rope, comprising a base body and a crane hook, wherein the crane rope is force-conductingly received on the base body and the hook block is suspended in an operating position along a lifting axis on the crane rope, the crane hook is force-conductingly received on the base body at a hook position for receiving the load, and an operating weight of the hook block for stabilizing the crane rope in the operating position is variably adjustable by means of a first additional weight that can be reversibly fixed to the hook block.wherein a retaining bolt is received in the base body along a retaining bolt axis arranged substantially orthogonally to the lifting axis and forms a first receiving device for force-conducting receipt of the first additional weight on the first receiving device by means of a retaining bore arranged in the first additional weight, with a first retaining length projecting substantially orthogonally to the base body on a first side of the base body.

The application discloses a kind of set hanging type peak forest planting harvesting transport system, belong to forestry planting harvesting field, system includes cableway, rope wheel set hanging trolley and multiple harvesting steps, wherein, rope wheel set hanging trolley, sliding connection is in the cableway, for transporting goods;The rope wheel set hanging trolley includes multiple cableway pulleys and goods hooking unit, the cableway pulley is equipped with goods hook, and multiple cableway pulleys are connected into pulley block by pulley connecting rope;The goods hooking unit is used to control the goods hook moves up and down along vertical direction;The present application automatically lifts up goods from different height position and hangs on cableway pulley, and the goods on goods hook are taken down and placed on arbitrary height harvesting step, realize the multiple hanging point goods transportation of arbitrary position of cableway coverage range.

The utility model relates to the technical field of power construction devices, in particular to an anti-falling bolt structure for a paying-off tackle, which comprises a hanging plate, a frame, an L-shaped fixing block, an H-shaped connecting plate, a door-shaped connecting plate, a first bolt rod and a second bolt rod. The end, close to the frame, of the L-shaped fixing block is fixedly connected with the bottom of the H-shaped connecting plate through a first bolt, the end, away from the frame, of the L-shaped fixing block is hinged to the bottom of the door-shaped connecting plate through a second bolt, and a first clamping groove and a second clamping groove matched with the end of the hanging plate are formed in the H-shaped connecting plate and the door-shaped connecting plate correspondingly. The H-shaped connecting plate and the door-shaped connecting plate are each provided with a first inserting hole, the end of the hanging plate is provided with a second inserting hole, positioning sleeves are arranged on one side of the H-shaped connecting plate and one side of the door-shaped connecting plate, through holes are formed in the tops of the positioning sleeves, and limiting rods are fixedly arranged in the through holes in a penetrating mode. According to the utility model, the connection reliability and the operation convenience of the hanging plate and the insertion frame of the paying-off tackle are improved while the bolt is prevented from falling off.

The utility model relates to the technical field of well drilling machinery, in particular to an upward running speed control anti-collision device of a drilling rig runner wagon. The speed-control anti-collision device comprises a traveling block of the drilling machine and a winch for driving the traveling block to move upwards, the winch is provided with the speed-control anti-collision device, and the speed-control anti-collision device comprises a main control loop, a speed regulation loop and a brake loop which are connected with a driller room. The main control loop comprises an anti-explosion control box located in a driller room. The speed regulation loop comprises a speed regulation module located in the driller room and a rotating speed regulation potentiometer located on the side portion of the winch. The brake loop comprises a brake control module located in the driller room and a brake actuator located on the side portion of the winch. A closed-loop control system is formed through the main control loop, the speed regulation loop and the brake loop, the traveling speed and position of the traveling block are monitored in real time, multiple protection is achieved, overspeed and collision accidents are effectively prevented, and the safety of drilling machine operation is ensured.

The utility model relates to the field of paying-off tackles, in particular to a power transmission line guide rope branching device, a frame body comprises a top frame, a supporting shaft and two bottom plates, the supporting shaft is arranged at the bottom of the top frame in a penetrating mode, and the two bottom plates are arranged on the outer side of the top frame respectively and arranged at the two ends of the supporting shaft respectively in a sleeving mode; a plurality of groups of wheel bodies sleeve the supporting shaft, each wheel body comprises a main body and a limiting plate group, the main body adjustably sleeves the supporting shaft, and the limiting plate group sleeves the outer side of the main body and comprises two limiting ring plates which can be relatively adjusted; according to the utility model, the limiting plate group is arranged, and a space for a cable to penetrate through can be formed under the cooperation of the two limiting ring plates, or the space for the cable to penetrate through can be formed under the cooperation of the two limiting ring plates and the outer ring plate, so that the state of the wheel body can be conveniently adjusted according to requirements, and the wheel body can adapt to cables with different sizes; the current situation that various types of paying-off tackles need to be arranged for cables of different sizes is changed, and the construction cost of a power transmission line is reduced.

The invention relates to a hinge (4a-4d) for movably mounting at least one cover element (2) on a fixed structure (1), comprising:-at least one first fitting (17a, 17b) for being arranged on the fixed structure (1),-at least one second fitting (17a, 17b) for being arranged on the at least one cover element (2), the hinge (4a-4d) having an articulated lever mechanism (12) by means of which the at least one cover element (2) can be movably mounted on the fixed structure (1), the two fittings (17a, 17b) can be moved substantially linearly between a first end position corresponding to the closed position of the cover element (2) and a second end position corresponding to the open position of the cover element (2), and wherein at least one pulley (19) with at least one pulley (19a) is provided on at least one of the two fittings (17a, 17b) in order to movably support the hinge (4a-4d) along the at least one guide (5a, 5b, 8a, 8b).

The invention discloses a high-precision gravity unloading device capable of achieving three-dimensional motion, and belongs to the field of gravity unloading. The device comprises an unloading truss assembly, a first longitudinal guide rail assembly, a second longitudinal guide rail assembly and two independent moving units, wherein the first longitudinal guide rail assembly and the second longitudinal guide rail assembly are different in installation height. Each set of motion unit comprises a longitudinal tackle assembly slidably connected to the longitudinal guide rail assembly, a transverse guide rail assembly bridged between the longitudinal guide rail assemblies, a transverse tackle assembly slidably mounted on the transverse guide rail assembly, a fixed pulley assembly fixedly connected to the transverse tackle assembly, and a lifting rope crossing the fixed pulley assembly to connect the tested rotating mechanism and the counterweight. Two sets of independent movement units are arranged, and the structural interference of a plurality of unloading points in the longitudinal opposite staggered movement process is avoided through the arrangement of longitudinal guide rails which are arranged in a high-low staggered mode. By optimizing the layout of the fixed pulley and the counterweight, three-dimensional high-precision dynamic follow-up unloading of a complex double-shaft rotating mechanism in a large rotating angle range is realized, and reliable microgravity environment simulation is provided for ground testing of aerospace equipment.

A tackle with an automatic braking function is characterized in that the tackle can move along a track and comprises a resistance generating structure and a mounting rack, the resistance generating structure comprises a magnetic field generating structure and a braking part, one of the magnetic field generating structure and the braking part is connected to the tackle through the mounting rack, and the other one of the magnetic field generating structure and the braking part is connected to the track; the pulley is further connected with a reset assembly, the reset assembly comprises a reset handle, and the reset handle can drive the mounting rack to rotate; by means of the resistance generating structure, the tackle can be automatically decelerated or braked at the specific position of the track, and the safety of the tackle in the using process is improved; through the cooperation of the magnetic field generation structure and the brake component, the acting force with the direction opposite to the movement direction is generated in a magnetic induction line cutting mode, and therefore the effects of decelerating and braking the tackle are achieved. And in the deceleration and braking process, the magnetic field generation structure does not make contact with the braking piece, friction loss is avoided, and the service life of the resistance generation structure is prolonged.