527results about "Runways" patented technology

The rail protection system is used for preventing the crown block running on a rail system from rushing out, the rail system comprises a straight rail and a bent rail in transition connection with the straight rail, in the walking direction limited by the straight rail, the straight rail is provided with a reserved straight section comprising a rail breaking opening on the first side of the bent rail, and the rail breaking opening is formed in the first side of the bent rail. The straight rail is provided with a conventional straight section on the second side of the bent rail; the track protection system comprises a blocking device fixed to the reserved straight section and a track protection device fixed to the reserved straight section. The steering guide piece is fixed above the conventional straight section; the steering device comprises a steering wheel arranged on the crown block, the steering wheel is configured to be capable of moving in the transverse direction so as to be adjusted to a guide matching position, and when the steering wheel is located at the guide matching position, the steering wheel is driven to rotate. The steering wheel can be matched with the steering guide piece when advancing along the conventional straight section so as to enable the crown block to steer and enter the bent rail, and the transverse direction and the walking direction are perpendicular to each other in the horizontal direction.

The utility model relates to the technical field of hanger rail moving equipment, in particular to a hanger rail moving device for metal electroplating, which comprises a limiting moving mechanism, a plurality of supporting mechanisms are arranged on the inner side of the limiting moving mechanism, the limiting moving mechanism comprises two first supports, and first sliding grooves are formed in the upper ends of the two first supports. A second support is arranged above the first support, a first limiting groove and a second limiting groove are formed in the two ends of the second support correspondingly, and a third telescopic rod is arranged at the upper end of the side, away from the first limiting groove, of the second limiting groove; according to the device, the multiple supporting mechanisms and the hanger rail bodies are arranged, the positions of the supporting mechanisms and the hanger rail bodies can be adjusted through stretching and retracting of the four telescopic rods, it is guaranteed that metal is electroplated in an original electroplating device all the time in the metal hanging and detaching process, and the metal electroplating efficiency is improved.

The invention discloses a portal crane for railway loading and unloading and a construction method and relates to the field of hoisting equipment. The portal crane for railway loading and unloading comprises at least two main beams arranged in parallel, a crane carriage, at least two conversion supports, two stand columns and two tire walking mechanisms connected to the bottoms of the two stand columns correspondingly. Tracks extending in the length direction of the main beams are arranged on the main beams. The hoisting trolley is movably arranged on each track; the at least two conversion supports are symmetrically connected to the bottoms of the main beams in a manner of rotating around the vertical axis, and the two ends of the conversion supports are configured to rotate along the vertical plane so as to support the ground or be folded; the two stand columns are connected to the bottoms of the two ends of each main beam in a telescopic mode in the height direction. According to the portal crane for railway loading and unloading and the construction method provided by the invention, the problem that large hoisting equipment cannot enter a station from a road and cannot be self-assembled under the working condition of no external hoisting equipment is solved.

A grid framework structure, configured to support one or more load handling devices, includes: a first set of grid members extending in a first direction and a second set of grid members extending in a second direction, to form a grid structure having grid cells. A plurality of vertical uprights create a storage space for storing containers in a stack such that load handling devices operative on the grid structure can lift containers through a grid cell from a stack below the grid structure. The vertical uprights are arranged such that a section of the grid structure including four adjoined grid cells is supported by five or fewer vertical uprights.

The utility model relates to the technical field of crown block moving maintenance devices, and discloses a crown block track monorail clamping obstacle crossing moving chassis which comprises a chassis body, a clamping mechanism is arranged on the chassis body and comprises a clamping motor, a clamping gear and two sets of clamping racks, the clamping gear is meshed with the two sets of clamping racks at the same time, and the clamping motor is arranged on the chassis body. Clamping wheels are rotationally arranged on the two groups of clamping racks; a driving system is further arranged on the chassis and comprises a driving motor, the driving motor is connected with a driving gear, a driving connecting rod is rotationally arranged on the chassis, a transmission gear is fixedly arranged on the driving connecting rod, and the transmission gear is meshed with the driving gear; the chassis is further provided with a driving mechanism, the driving mechanism comprises a first gear and a driving wheel, the driving wheel is fixedly connected with a second gear, and the second gear is meshed with the first gear. According to the utility model, the problem that the inspection and maintenance work of the crown block track is influenced because the movable chassis is blocked by a pressing plate bolt or an irregular joint and cannot normally move on the track can be solved.

The application relates to the technical field of hoisting devices, in particular to a modular building intelligent hoisting device. The technical scheme comprises a main support assembly, further comprises a hoisting and transporting platform used for bearing a hoisting assembly, the hoisting and transporting platform is slidingly installed in the inside of the main support assembly, the hoisting and transporting platform comprises a main support table, an auxiliary table is rotationally installed at the bottom of the main support table, a spacing adjusting assembly used for adjusting the X-axis spacing is installed at the bottom of the hoisting and transporting platform. The first telescopic rod is used for conducting the pulling force to the piezoelectric sensor for real-time detection of building shaking through the disc-shaped compensation assembly, meanwhile, the Y-axis offset of the modular building is automatically compensated through the linkage hydraulic telescopic rod, the swing caused by wind force and the vibration occurring when the modular building rotates are reduced, the collision risk of the modular building is reduced, and the modular building is particularly suitable for high-altitude operation.

The application discloses a kind of narrow space vertical pipeline mounting device, it is related to building pipe body welding technical field, including crane, inner load mechanism, top bracing mechanism and bottom support, crane is equipped with transverse moving pair and longitudinal moving pair, crane is equipped with sling cable;Inner load mechanism includes at least two inner carriers, all inner carriers are vertically linearly connected to form inner load mechanism, the top end of inner load mechanism is detachably connected with the free end of sling cable, inner load mechanism is used to be arranged in the pipe body to be hoisted, the length of inner load mechanism is longer than the pipe body to be hoisted;Top bracing mechanism includes multiple top bracing cylinders, top bracing cylinder is one-to-one corresponding with inner carrier, and is sleeved on the outer corresponding inner carrier, top bracing cylinder can expand radially outward, to extrude the inner wall of pipe body to be hoisted;Bottom support is detachably connected with the bottom end of inner load mechanism, the size of bottom support is greater than the inner diameter of pipe body to be hoisted.It can solve the problem that pipe body to be welded cannot effectively guarantee vertical state and cannot effectively center with upper pipe body when pipe body is segmented and welded.

The utility model relates to hoisting equipment technical field, concretely is a kind of hydraulic hoist crossbeam arm, including crossbeam arm body, electric slide is slidably installed on the crossbeam arm body, the bottom of electric slide is fixedly installed with connecting frame, the inner wall of the crossbeam arm body is fixedly installed with gear plate, the one side rotationally installed with pivot in the top of electric slide, the top of pivot is fixedly installed with positioning gear. This one kind of hydraulic hoist crossbeam arm, through the cooperation of crossbeam arm body, electric slide, connecting frame, pivot, positioning gear, gear plate, tooth block, pressing plate, cam plate, servo motor, spring, slide and fixed plate, the dynamic self-locking mechanism of electric slide top can lock its position in real time in this crossbeam arm operation, reduce electric slide load pressure, improve its long-term operation stability on crossbeam arm body, improve equipment service life and reliability.

The utility model relates to hoisting technology field more specifically, relate to a kind of hoisting device and anti-shake anti-explosion headstock, wherein hoisting device includes first mounting bracket, sling, synchronous shaft, two first drive mechanisms and two groups of hoisting components, two groups of hoisting components are symmetrically arranged on the first mounting bracket, two first drive mechanisms are respectively connected with two groups of hoisting components transmission, the both ends of synchronous shaft are respectively connected with two groups of hoisting components transmission, two hoisting components are connected with the sling, and the sling is located below the first mounting bracket. The utility model not only improves the load capacity of hoisting device, but also ensures that sling has stable lifting posture, improves the anti-shaking of hoisting device.

The utility model discloses a track lifting appliance and track lifting device, be applied to track lifting field, track lifting appliance includes hanging ring and enveloping block, the inside of hanging ring is equipped with the hoisting cavity that allows the track and enveloping block to place, the both ends of hoisting cavity are open structure, the side face is equipped with the opening, and the hoisting cavity is equipped with the track and enveloping block. The width of the opening is greater than that of a rail head of the rail; the enveloping block is detachably mounted in the hoisting cavity and is positioned between the track and the hoisting ring; the top of the enveloping block is provided with a lifting part used for lifting the enveloping block, and the outer side face of the enveloping block is further provided with a wedge-shaped face, so that the enveloping block swings when moving upwards and compresses the track. The rail lifting appliance provided by the utility model is simple in structure, convenient to operate, capable of being mounted at any position of the rail, reliable in lifting and wide in application range.

The application discloses a large-span high-net-frame electromechanical pipeline hoisting equipment and a mounting method thereof, and relates to the field of pipeline hoisting. The equipment comprises a track, a hoisting pulley assembly mounted on the track, the hoisting pulley assembly being capable of hoisting or conveying pipelines along the track, two hoisting assemblies and two walking devices. The bottom of each hoisting assembly is connected with a hoisting frame through a sling. The equipment can control the clamping and releasing of the two pipelines by the clamping assembly, reduce the occurrence of pipeline falling off during hoisting, control the clamping or releasing state of the two pipelines by the clamping assembly, make the pipelines tilt, enable the tilted pipelines to pass through the steel frame structure of a building, change the clamping point of the pipelines, change the position of the pipeline hoisting point, reduce the shaking of the pipelines, and make the hoisting more efficient and safe.

The invention belongs to the technical field of tracks, and particularly relates to an anti-skid monorail crane track and a machining method thereof.The anti-skid monorail crane track comprises a track body, a web is fixedly connected to the inner wall of the track body, an anti-skid wear-resistant layer is arranged on the surface of the web, and track wheels are arranged in the anti-skid wear-resistant layer; cleaning assemblies are arranged on the two sides of the track body and used for cleaning the interior of the track body in the using process. A self-adaptive buffering assembly is arranged between the web and the anti-skid wear-resistant layer, a contact area matched with a track wheel is arranged in the anti-skid wear-resistant layer, a thermal compensation anti-condensation assembly is arranged on the outer side of the track body, and an impurity closed-loop collecting assembly is arranged at the bottom of the track body. By arranging the thermal compensation anti-condensation assembly and adopting the design of'temperature and humidity dual detection-graphene precise heating ', the temperature and humidity conditions of condensate water generation are broken from the source, and compared with a traditional passive cleaning mode, the condensate water generation amount is reduced by 90% or above.

The invention belongs to the technical field of hoisting, and provides a hoisting device, bearing equipment and a hoisting method.The hoisting device is used for hoisting a to-be-hoisted object into a bearing frame, and the hoisting device comprises a hoisting frame, a sliding assembly and a hoisting tool; the hanging bracket is connected with a bearing frame; the sliding assembly is slidably connected to the hanging bracket. The lifting appliance is connected to the sliding assembly. According to the bearing frame, friction damage to articles when the articles are placed in the bearing frame is reduced, and the assembling convenience can be improved.

The utility model discloses a European style double-beam crane track device with a self-cleaning function, which relates to the technical field of track devices and comprises two tracks, racks are fixedly connected to the upper sides of the tracks, sliding grooves are formed in the upper sides of the tracks, a tractor is connected to the upper sides of the tracks in a sliding mode, rollers are arranged on the lower side of the tractor, and the upper sides of the tracks are connected with the racks in a sliding mode. The inner surfaces of the sliding grooves are movably connected with rolling wheels, and the upper side of the tractor is fixedly connected with a dust storage box. Through mutual cooperation of the tractor, the fan, the dust storage box, the clamping device, the first supporting plate, the first gear, the second gear, the fluted disc, the rotating shaft and the sweeping rod, the track can be rotationally swept, foreign matter can be effectively removed through the rotary sweeping function, it is guaranteed that the surface of the track is kept relatively clean all the time, and the cleaning efficiency is improved. The safety risk caused by foreign matter is greatly reduced, the good friction performance of the surface of the rail is kept, the slipping phenomenon is reduced, and the safety and stability of crane operation are improved.

The utility model discloses a bridge crane limiting device which comprises a sliding rail, two pulleys are connected to the bottoms of the front end and the rear end of the sliding rail in a sliding mode, the front pulley and the rear pulley are connected with a sliding frame in a rotating mode through rotating shafts, a lifting hook is installed at the lower end of the sliding frame, and the bridge crane limiting device further comprises a limiting mechanism. The limiting mechanism comprises first dovetail grooves, convex tooth clamping strips, a rack plate and a driving assembly, the first dovetail grooves are symmetrically formed in the front side and the rear side of the sliding frame in the left-right direction correspondingly, and the convex tooth clamping strips are slidably connected between the two first dovetail grooves in the front side and between the two first dovetail grooves in the rear side correspondingly. Through mutual cooperation of all the elements, accurate stopping and limiting operation can be conducted on movement of the bridge crane, the situation that the bridge crane continues to slide along the corresponding sliding rails due to self or external reasons after overall stopping is avoided, and stopping and limiting of overall movement of the bridge crane are accurate.

The utility model provides a hoisting device for heavy packaging, and relates to the technical field of hoisting, the hoisting device comprises a supporting frame, two X-axis toothed rails are symmetrically arranged at the top of the supporting frame, a sliding plate is slidably mounted between the two X-axis toothed rails, a Y-axis toothed rail is arranged on the sliding plate, and a retracting and releasing device is slidably mounted on the sliding plate; a lifting rope is arranged at the bottom of the winding and unwinding device, and a lifting hook is fixedly installed at the end of the lifting rope. And any one of the X-axis toothed rail and the Y-axis toothed rail is provided with a driving assembly. In order to solve the problem that mechanical damage is caused to a hoisting device by swinging when the heavy package is hoisted due to the fact that whether the winding device can not be accurately located over the heavy package or not, a driving assembly and a locking assembly are arranged, so that the winding device can move to the position over the heavy package in advance when the heavy package is hoisted, and the heavy package is prevented from being damaged. And then the heavy package is hoisted and carried.

The utility model relates to the technical field of blow-off pipes, and provides a blow-off pipe transportation device and a detection system, the device comprises a bearing frame, a transportation support, a first crane mechanism and a second crane mechanism. Wherein the bearing frame bears the blowout pipe; a transportation area is formed on the transportation support, and the bearing frame, the sealing performance testing mechanism and the storage frame are all arranged in the transportation area; the first crane mechanism is slidably connected to one side of the transportation support and is suitable for hoisting the blowout pipe to the sealing performance testing mechanism. The second hoisting mechanism is slidably connected to the other side of the conveying support and is suitable for hoisting the blowout pipe to the storage rack. According to the conveying device for the blowout pipe, the blowout pipe does not need to be manually carried to a sealing performance testing mechanism; and the detected blowout pipe can be lifted to the storage rack, the detected blowout pipe does not need to be manually moved to the storage rack, the workload of workers on the blowout pipe is greatly reduced, the detection efficiency is improved, the risk of hurting people by crashing is avoided, the safety and the detection precision are improved, and the cost is reduced.

This disclosure relates to a novel joint support structure for a rail bearing beam, including a rear beam connecting a crane and a front beam with varying pitch angles. Both the front and rear beams have rail bearing beam webs on their sides, which are connected via V-joints. Rails are mounted on the top of both the front and rear rail bearing beam webs. The break points of the rails are aligned with the break points of the rail bearing beams on the front and rear rail bearing beam webs, ensuring that each rail break point remains within the support range of its corresponding rail bearing beam web. This ensures smooth movement of the hoisting trolley on the rails, and the consistent break point positions also allow for rail tightening via pressure plates, preventing loosening of nearby rail pressure plates under frequent loads.

The utility model relates to a rail aligning and locking device suitable for a rail system. A driving mechanism is arranged on a butting rail, and a driven mechanism is arranged at the end part of a movable rail; the driving mechanism comprises a driving plate, an inserting rod linearly sliding along the driving plate, and a positioning shaft and a locking shaft which are arranged at the front end of the inserting rod; the driven mechanism comprises a driven plate, a mounting seat, a positioning block which elastically and linearly slides along the mounting seat and two clamping claws which are symmetrically connected above the mounting seat in a rotating manner, the mounting seat is arranged on the driven plate, a guide groove is formed above the mounting seat, and a V-shaped groove is formed in the front end of the positioning block; the positioning shaft moves forwards to abut against the interior of the V-shaped groove, so that the movable rail and the butt-joint rail are aligned up and down, the locking shaft moves forwards to the interior of the guide groove and is arranged between the two clamping claws, so that the movable rail and the butt-joint rail are aligned left and right, and the two clamping claws are matched to clamp the locking shaft. According to the utility model, horizontal alignment and vertical alignment of two different rails can be realized, stable locking between the rails can also be realized, and the reliability and smoothness of rail replacement are improved.

The invention provides a hoisting tool. The hoisting tool comprises a supporting beam, a track beam, a moving part and a hoisting part. The supporting beam is attached with a hanging part, and the supporting beam is configured to be connected with a carriage body of the vehicle; a hanging part is attached to the track beam, the hanging part is detachably hung on the hanging part, the track beam forms a track in the length direction of the track beam, one end of the track is arranged in the compartment body, and the other end of the track is arranged outside the compartment body; the moving part is connected to the track and can reciprocate between the two ends of the track; and the hoisting piece is connected with the moving piece, and the hoisting piece is configured to be capable of hoisting a target object located outside the compartment body to a target height higher than the bottom of the compartment body. The invention further provides a robot transportation device comprising the hoisting device.

The utility model provides a loop chain type electric double-beam crane which comprises two parallel girders, end beams are arranged at the tops of the girders in a sliding mode, a main beam is arranged between the two end beams, a main beam trolley is arranged at the bottom of the main beam in a sliding mode, and a loop chain elevator is fixedly arranged at the bottom of the main beam trolley. Buffering anti-jumping limiting mechanisms matched with the end beams are arranged at the two ends of the girder. In the utility model, when the end beam travels to the end part of the girder and collides, and the end beam limiting plate drives the sliding rod to move for a certain distance in the supporting plate, the extension arm drives the swing arm to swing, one end of the swing arm close to the end beam moves downwards, and the lower pressing wheel at the end part of the swing arm is pressed on the top of the end beam, so that wheels in the end beam are prevented from jumping out of a rail at the top of the girder; potential safety hazards are reduced.

The utility model discloses a detachable movable lifting device which comprises vertical supporting frames, a transverse supporting frame and a lifting part, the two ends of the transverse supporting frame are detachably connected with the vertical supporting frames through connecting assemblies respectively, and therefore the vertical supporting frames can support the transverse supporting frame in a high mode. The lifting part is arranged on the transverse supporting frame, moving universal wheels used for moving are arranged at the bottom of the vertical supporting frame, and the lifting part is used for lifting objects below the transverse supporting frame; according to the utility model, disassembly, decomposition, carrying and movement can be realized through the detachable structure, and the overall rapid movement can be realized through the arrangement of the movable universal wheels, so that the multifunctional lifting appliance can be suitable for different use environments and modes to realize the adjustment of the position of a lifted object, can realize multipurpose lifting operation, and is wide in application range, high in popularization value, cost-saving and high in practicability. The workload and the labor intensity of personnel are reduced, the working efficiency is improved, and the personnel and equipment safety is ensured.

The utility model discloses a double-beam lifting device, which belongs to the technical field of lifting devices and comprises longitudinal beams fixedly arranged on the upper portions of two sides of a workshop, a first vehicle rail is fixedly arranged on the upper end face of each longitudinal beam, and two ends of a vehicle frame are slidably connected with the corresponding first vehicle rails through first rollers. Second vehicle rails are fixedly arranged on the upper end face of the vehicle frame in the left-right direction, and the two ends of the hoisting trolley are slidably connected with the corresponding second vehicle rails through second rolling wheels. A winch drum and a power motor are arranged on the hoisting trolley, an output shaft of the power motor and the winch drum are fixedly arranged, and a steel wire rope is wound on the winch drum; the steel wire rope is provided with hooks. By arranging the frame and the hoisting trolleys, when the device is used, the hoisting trolleys can be selected nearby according to materials to be hoisted on site, so that the left-right moving time of the hoisting trolleys is effectively shortened, the hoisting efficiency is improved, and meanwhile, the two hoisting trolleys can be independently and simultaneously used and do not interfere with each other; and the production efficiency is further improved.

The utility model relates to a buffer, in particular to a buffer structure of a bridge crane, which comprises a base, a damping cylinder arranged on the base and a piston rod inserted on the damping cylinder in a sliding manner, and a damping structure is arranged at one end, positioned in the damping cylinder, of the piston rod. The damping structure comprises a piston which is arranged on the piston rod and slides on the inner wall of the damping cylinder. Core components of the damper mainly comprise the piston, the damping cylinder, the rotating disc and the inserting rod, the piston is installed in the damping cylinder and can freely slide in the damping cylinder, the rotatable rotating disc is arranged in a cavity of the piston, and the inserting rod is responsible for driving the rotating disc to rotate in the cavity of the piston. A plurality of first arc-shaped holes and second arc-shaped holes are formed in the piston and the rotating disc respectively, the actual size of the damping holes is directly determined by the overlapping area of the first arc-shaped holes and the second arc-shaped holes, then the flowing speed of hydraulic oil or other damping media is affected, and finally the damping force is adjusted.

The application provides a mine shaft tower travelling crane hoisting method and a mine shaft tower travelling crane. The method comprises the following steps: reserving a hoisting hole when the shaft tower is capped, and arranging a primary crown wheel platform above the hoisting hole; hoisting the track beam and the travelling crane beam through the primary crown wheel platform, and installing the track on the track beam; re-twisting the primary crown wheel platform, and arranging a secondary crown wheel platform at the reserved hole at the center position of the top plate of the shaft tower; hoisting the travelling crane beam onto the track through the secondary crown wheel platform; re-twisting the secondary crown wheel platform, and re-arranging a tertiary crown wheel platform above the hoisting hole; and hoisting the walking trolley onto the travelling crane beam through the tertiary crown wheel platform. The application can simply and quickly realize the hoisting of the mine shaft tower travelling crane.

A fabricated building building machine hoisting device with an auxiliary balance function comprises a walking mechanism installed between two supporting main beams, the two supporting main beams are fixedly installed at the upper end of a building building machine, longitudinal rails are arranged on the upper surfaces of the supporting main beams, and two rail wheels are arranged at the two ends of a main frame body of the walking mechanism side by side; the rail wheels at the two ends are connected to the longitudinal rails on the two sides in a matched mode, a longitudinal driving assembly connected with the rail wheels is arranged in the main frame body, an I-shaped beam is arranged on the bottom face of the main frame body, a winch below the I-shaped beam is connected with the I-shaped beam in a sliding mode, and a transverse driving assembly is arranged between the winch and the I-shaped beam. Two clamping and positioning mechanisms are symmetrically mounted on the shell on the two sides of the winch; the device has the advantages that the hoisting operation is simple and convenient, an operator can perform high-quality and high-efficiency assembling operation through the device, the two clamping and positioning mechanisms can clamp the upper part of a prefabricated part, the auxiliary positioning effect is achieved, the violent shaking phenomenon is avoided, and the construction safety is ensured.

The utility model discloses a high-speed wire rod C-shaped hook stopper, which belongs to the technical field of high-speed wire rod transportation and comprises a mounting seat, a baffle plate, a driving mechanism and a safety component, the baffle plate is slidably arranged on the mounting seat, the driving mechanism is in power connection with the baffle plate to drive the baffle plate to horizontally move on the mounting seat along a preset path, and the safety component is arranged on the mounting seat. The safety assembly comprises a blocking piece and a traction piece, the blocking piece is movably arranged on the installation base, and the traction piece is connected with the blocking rod and used for driving the blocking rod to move to a preset position on the preset path or driving the blocking rod to be away from the preset position. When the C-shaped hook stopper is mistakenly operated or triggered, the C-shaped hook stopper can prevent the C-shaped hook from continuously moving, so that the safety of equipment and personnel is protected.

The utility model discloses a heavy hammer limiting device of a crane gantry hook system, and relates to the technical field of winching. A heavy hammer limiting device of a crane gantry hook system comprises a sliding rail, a jack, a second steel wire rope and a lifting hook, the jack is provided with a heavy hammer limiting device, the heavy hammer limiting device comprises a U-shaped base, a steel pipe and a fixed support, and the heavy hammer limiting device is installed on a bottom beam of a main trolley through the U-shaped base in the heavy hammer limiting device. A first steel wire rope with a heavy hammer is connected to a travel switch through a guide pipe, a fixed platform is arranged on a gantry hook cross beam under the heavy hammer and used for touching the heavy hammer and triggering limiting action, when the rotary travel switch fails during ascending, the fixed platform touches the heavy hammer, the travel switch acts, and the secondary protection effect is achieved. And meanwhile, the lubricating grease on the second steel wire rope can be effectively prevented from sticking to the steel wire rope of the hoisting heavy punch and the U-shaped seat, so that the travel switch acts in advance or the steel wire rope of the hoisting heavy punch is pulled apart in the running process, the travel switch is damaged, even the U-shaped seat is clamped in a rope groove, and the normal running of the travelling crane is influenced.