1134 results about "Slewing bearing" patented technology

The invention provides a building construction site safety monitoring and early warning method and system based on the Internet of Things, and relates to the technical field of data processing.The method comprises the steps that a three-base-point dynamic topological structure is established in a target monitoring domain, a first datum point is arranged at the extension end of the axis vertical line of a slewing bearing of a tower crane, and a second datum point is arranged at the extension end of the axis vertical line of the slewing bearing of the tower crane; the second datum point is embedded in the radial section of a force bearing flange plate of the hydraulic jacking module, the third datum point is fixedly connected to the intersection joint of a deep foundation pit top beam and a supporting system, and a non-collinear vector set is constructed through three-point coordinate offset; and based on the non-collinear vector group, deformation compensation correction is performed on the dynamic calibration parameter set through a vector space topological transformation algorithm, a topological reconstruction data stream containing a displacement gradient tensor and strain energy density is generated, and a risk situation feature space is constructed based on the topological reconstruction data stream. According to the invention, the intelligent construction safety management is realized.

An aluminum foil slitting and winding device relates to the technical field of slitting and rewinding and comprises a slitting unit, a rewinding unit, a tension adjusting device and a slitter edge winding device. The tension degree adjusting device works cooperatively through a rotary disc, a swing arm and a variable-diameter adjusting roller, it is ensured that the wrap angle and the tension degree are constant when aluminum foil enters the roller, and the problems of wrinkles and edge warping in the winding process are remarkably solved. The variable-diameter adjusting roller adopts the design of an elastic supporting framework and a double-spiral lead screw, and the transverse and longitudinal tension degree of the aluminum foil can be flexibly adjusted. And the slitter edge winding device is provided with a slewing bearing and a reel, so that ordered winding of slitter edges is realized, and normal winding operation is prevented from being interfered. In addition, a pulse type air hammer and a buffer device are further arranged and used for releasing the stress of the edge of the aluminum foil and preventing the slitter edge from being knotted or wound correspondingly, and the winding process is further optimized. According to the aluminum foil winding device, the stability and quality of aluminum foil winding are improved, the operation difficulty is reduced, and the production efficiency is improved.

The invention belongs to the technical field of grinding, and discloses a self-adaptive weld joint grinding robot suitable for a large pipeline, which comprises a rack and a grinding assembly, the grinding assembly comprises a plane workbench, a slewing bearing seat, a pitching adjusting support and a supporting seat, and the plane workbench, the slewing bearing seat and the pitching adjusting support are sequentially arranged from bottom to top; the supporting base is installed on the pitching adjusting support in a sliding mode, a driving wheel, a polishing wheel, a tensioning wheel, an abrasive belt and a polishing motor are installed on the supporting base, the driving wheel, the polishing wheel and the tensioning wheel are distributed in a triangular mode, and the abrasive belt is arranged on the outer side of the driving wheel, the outer side of the polishing wheel and the outer side of the tensioning wheel in a sleeving mode to jointly form a polishing mechanism. The rotary supporting seat and the pitching adjusting supporting seat are sequentially arranged on the plane workbench, and the rotary supporting seat and the pitching supporting seat are connected through the reset spring, so that the polishing assembly installed on the pitching adjusting supporting seat has a great angle adaptation effect, and then factors such as misalignment of a welding seam and ovality change of a workpiece can be adapted.

The invention discloses a crane slewing bearing test tool which comprises a base and a frame plate arranged on the base, a supporting plate is horizontally arranged on the frame plate, tool bases are arranged at the two ends of the supporting plate, a mandrel is movably arranged between the two tool bases, a tool sleeve is arranged on the mandrel in a sleeving mode, and a mounting cavity is formed between the tool sleeve and the mandrel. The base is provided with a first loading piece used for applying radial loading acting force to the tool sleeve and a regulation and control piece used for being in linkage fit with the first loading piece to enable the loading direction of the first loading piece to be changed, and the frame plate is provided with a second loading piece used for applying radial loading acting force to the tool sleeve. The supporting plate is provided with a driving part used for driving the mandrel to operate so as to simulate the actual operation condition of the bearing. The problems that a traditional crane slewing bearing test tool is single in test loading direction, the actual operation working condition of the bearing is difficult to simulate, and the loading working conditions of loads in different directions during actual operation of the bearing cannot be simulated are solved.

The utility model discloses a full-rotation hoisting pile driver for an offshore ship. The full-rotation hoisting pile driver comprises a full-rotation hoisting device and a pile driving device, the full-rotation lifting device comprises a base, a rotation bearing, a rotation chassis, a propeller strut and an arm support. The base is connected with the rotary chassis through the rotary bearing; the propeller strut is arranged on the rotary chassis; the lower end of the arm frame is movably connected with the propeller strut, and the propeller strut is wound with the arm frame through a steel wire rope; the piling device comprises a pile frame, a fork frame and a winding mechanism; the pile frame is connected with the upper end of the arm frame through a sliding shoe; one end of the fork frame is movably connected with the pile frame, and the other end of the fork frame is movably connected with the propeller strut; and the platform on the pile frame is connected with the corresponding winch in the machine room through the winding mechanism. According to the utility model, the full-circle slewing crane and the piling system are effectively combined, so that the piling requirements of straight piles and inclined piles can be met without frequent ship moving and positioning.

The invention belongs to the technical field of bearing machining equipment, and particularly relates to a polishing device for the end face of a slewing bearing, the polishing device comprises a workbench, a supporting frame is fixedly connected to the workbench, an upper polishing mechanism used for polishing the upper surface of a bearing body is installed at the top of the supporting frame, and the upper polishing mechanism comprises a protective cover, a rotating shaft and a rotating shaft; and the bracket is fixed on the support frame. A reciprocating telescopic part and a water spraying part are arranged on the upper grinding mechanism, when a first motor drives a shaft rod and an upper grinding disc to rotate, a rotary disc can rotate synchronously, then a wedge-shaped block makes contact with a ball at the bottom of the reciprocating telescopic part, and a telescopic plate is driven to move upwards; and then the telescopic rod is driven to move through the matching relation between the upper wedge-shaped limiting block and the lower wedge-shaped limiting block, then the piston is made to move, water spraying operation of the spray head is achieved, when the rotating speed of the upper grinding disc is higher, the water spraying amount is larger, otherwise, the water spraying amount is smaller, and the problem that at the present stage, the device lacks an automatic water spraying and cooling function is solved.

The invention relates to a hoisting system for mounting a prefabricated building prefabricated structure, which comprises a horizontal angle adjusting mechanism and a rotating platform, the rotating platform comprises a slewing bearing, an upper flange is arranged on the upper end face of the outer ring of the slewing bearing, and a lower flange is arranged on the lower end face of the inner ring of the slewing bearing; the upper flange is provided with a first driving piece for driving the inner ring of the slewing bearing to rotate around a shaft; the three-dimensional fine adjustment mechanism comprises a vertical fine adjustment assembly, a transverse fine adjustment assembly and a longitudinal fine adjustment assembly. According to the invention, X / Y / Z linear displacement and Z-axis rotation adjusting functions are integrated, manual intervention is reduced, adjustment of horizontal displacement, vertical height and horizontal angle can be realized, and the mounting efficiency and safety of the laminated slab are improved.

The utility model discloses an in-plant trial assembly assistive device for a door-shaped rotary bearing beam of a bucket-wheel excavator. The in-plant trial assembly assistive device comprises a pitching reaming coaxial tool and a rotary center coaxial tool. The pitching reaming coaxial tool comprises a transverse center shaft, a side clamping flange and a side baffle, a first middle stand column and a second middle stand column are fixed to the two ends of the transverse center shaft through the side clamping flange and the side baffle, and it is guaranteed that the pitching reaming coaxiality of the material taking arm meets the drawing requirement; the rotation center coaxial tool comprises a vertical center shaft, a top clamping flange, a top baffle and a supporting base, the top of the rotation center coaxial tool fixes a top cross beam to the vertical center shaft through the top clamping flange and the top baffle, and the bottom of the rotation center coaxial tool fixes the vertical center shaft and a bearing beam rotation base together through the supporting base. And the coaxiality of the rotating shaft of the discharging arm to the rotation center meets the drawing requirements. According to the utility model, the product assembly precision can efficiently meet the drawing requirement, each part can be supported and connected, the overall stability of the product is improved, and the safety risk in the production process is reduced.

The utility model discloses a sealing type slewing bearing which comprises an inner ring and an outer ring which are arranged from inside to outside, a plurality of balls are arranged between the inner ring and the outer ring, the end face of the inner ring is higher than the end face of the outer ring, a sealing ring is arranged on the side face of the inner ring, and the inner ring and the outer ring are arranged in parallel. An annular protrusion is formed on the lower end face of the sealing ring, the end face of the outer ring is sunken downwards to form an annular groove, the annular protrusion is rotatably clamped in the annular groove, a gap exists between the lower end face of the sealing ring and the end face of the outer ring, and a rubber ring with a U-shaped section is detachably arranged at the end of the sealing ring. The problems that in the prior art, a rubber ring is arranged on the surface of a slewing bearing, one end of the rubber ring is clamped to the side face of an inner ring, the other end of the rubber ring is attached to the end face of an outer ring, after long-time use, the elasticity of the sealing rubber ring is reduced, the end of the rubber ring is prone to upwarp, and the sealing performance is reduced are solved.

This invention relates to the field of quenching equipment technology, specifically to a rotary bearing integral quenching machine arm without a soft strip, comprising a base and a mounting plate located above the base. The bottom end of the mounting plate has a horizontally rotatable adjustment plate. Several displaceable driven arms are evenly distributed through the side wall of the adjustment plate. Each driven arm has a rotatable extension arm on its other end. A lifting frame is fixed to the lower side surface of each extension arm. When the lifting frames face each other or away from each other, they can lift the workpiece to be processed. This processing device adjusts the spacing of the extension arms by adjusting the displacement of the driven arms, and lifts workpieces of different specifications by rotating the lifting frames. The rotation of the first and second drive rollers drives the workpiece to rotate, facilitating processing.

The present application relates to quenching equipment technical field, specifically is related to a slewing bearing no soft band integral quenching machine tool, including base, the upper surface of base is provided with collecting groove, X axis support is equipped in collecting groove, the adjustable box that can along its installation direction horizontal sliding is equipped on X axis support, the top end of adjustable box is embedded with rotatable support cylinder, a plurality of clamping jaws are provided in the side wall of support cylinder, the clamping jaw is driven and the spacing is adjusted by the drive assembly arranged in support cylinder;The slewing bearing is clamped or released in the process of approaching or moving away each other, the rotating motor can drive the rotation of support cylinder, and then the slewing bearing clamped in the inside of clamping jaw is adjusted, when adjustable box is at different positions on X axis support, the inside or outside of different specifications of slewing bearing can be quenched.

A large-swing-angle fine-tuning air floatation adjusting frame for optical element detection realizes 360-degree large-angle deflection through hierarchical connection of a bottom plate, a transition plate, a middle plate and a pitching plate in cooperation with a slewing bearing, and realizes nanoscale fine tuning by using a screw rod and a ball head structure of a deflection block. The ton-level optical element can be easily moved and positioned through the air floating module, the side sliding plates and the guide rails are matched with elements of different sizes, and clamping safety is guaranteed through the middle cushion blocks and the side soft cushions. The device can assist detection personnel in performing real-time precise detection on the surface type parameters of the optical element, is particularly suitable for meter-scale, heavy and difficult-to-move optical elements, can conveniently and quickly adjust the measurement surface and the measurement angle, and realizes quick adjustment and measurement of the detection personnel on the optical element.

The invention relates to the technical field of laser, in particular to a follow-up atmosphere protection large slewing bearing laser cladding repairing device and method.The device comprises a large slewing bearing, a laser cladding system, an X-Z-axis two-dimensional motion platform, a follow-up inert atmosphere chamber, a C-axis rotating table, an atmosphere control system and a master control system. According to the invention, the cladding head is driven to generate relative motion in the vertical direction and the horizontal direction by virtue of the X-Z-axis two-dimensional motion platform, and the inert atmosphere chamber and the cladding head are driven to move in the circumferential direction of the slewing bearing subjected to additive machining by virtue of the C-axis rotating table, so that continuous machining of laser cladding additive manufacturing and remanufacturing of the large rotary structural member is realized. The follow-up inert atmosphere chamber is small in volume, short in inflation and deflation time and high in efficiency. And the cladding head is provided with double hammering units, so that hot metal which is just deposited can be hammered synchronously, and cladding processing and processing post-processing can be carried out synchronously.

The invention belongs to the technical field of metallurgical mechanical transmission, and relates to a four-point rotation end driving device which comprises a rotation driving device, a gear motor and a bidirectional damping supporting device, the rotation driving device is provided with four outer meshing point positions distributed at equal center distances, and each outer meshing point position is provided with an interchangeable gear shaft box; the driving device is used for driving the rotary driving device; an input shaft of the gear shaft box is sleeved with a hollow output shaft of the gear motor, and the gear motor is flexibly connected with the gear shaft box through a diaphragm flange device; the two sides of the rotation driving device are flexibly supported by the two-way damping supporting device. According to the suspension primary speed reducer, the number of meshing points is increased to four, the load of a single meshing point is effectively dispersed, the tooth width coefficient is reduced, and therefore the lightweight design of the suspension primary speed reducer is achieved, a single slewing bearing is adopted to replace a large gear and a supporting bearing in a traditional low-speed gear box, and the axial size and the manufacturing cost are greatly reduced.

The invention discloses a driving mechanism of a high-altitude double-track prone-to-track type inspection robot, belongs to the technical field of gas leakage monitoring, and aims to solve the problems that a single-track robot is poor in stability, easy to fall off and stuck during turning, and wheel sets are difficult to maintain. The device comprises an aluminum alloy substrate, a transmission module with an explosion-proof motor and a self-locking positive and negative trapezoidal screw rod, a bearing module with a rotary support, and a limiting bearing wheel set comprising an adjustable limiting wheel and an elastic guide wheel. The double-track lying rail design prevents transverse swinging and falling, the slewing bearing solves the problem of turning angle difference, the positive and negative trapezoidal screw rods prevent turning clamping, and the rectangular spring realizes pressure adjustment of the driving wheel. The whole machine is explosion-proof, is high in load capacity (adaptive to multiple acquisition devices), is suitable for high-altitude inspection of flammable and explosive places such as petrochemical engineering, and improves the monitoring comprehensiveness and safety.

The invention provides a wind generating set pivotal bearing fault diagnosis method based on high-order statistic analysis, which takes skewness and kurtosis as measurement standards for denoising of a statistical filter, inhibits interference of background noise and enhances expression of fault features so as to relieve the problem that a fault signal is covered by the background noise. According to the method, deep features caused by bearing faults are reflected in a high-dimensional space by applying phase-space reconstruction, and feature fault diagnosis is performed on non-Gaussian and non-linear signals in the high-dimensional space by adopting adaptive multi-spectral estimation. Compared with a traditional linear feature diagnosis method, the problems that background noise and fault signals are mixed together and are difficult to separate and non-linear and non-Gaussian features interfere with diagnosis are solved, and a new solution is provided for fault diagnosis of the slewing bearing of the wind generating set.

The utility model provides a slewing bearing replacing tool which is arranged on a base and a slewing platform of a crane, the base is fixedly provided with a jacking mechanism, the jacking mechanism comprises a base and a jack, the base is fixedly connected with the base, the jack is fixedly connected with the base, and the slewing bearing replacing tool further comprises a limiting mechanism. The limiting mechanism is arranged between the base and the rotary platform and comprises a limiting block, a limiting plate and a limiting gasket, the limiting block is fixedly connected with the bottom of the jack, the limiting plate is fixedly connected with the bottom of the rotary platform, and the limiting gasket is detachably connected between the bottom of the limiting block and the bottom of the limiting plate. One side face of the limiting block is connected with the inner side wall of the limiting plate, the limiting block and the limiting plate are slidably connected in the extending direction of the jack, adjustment is convenient, the structure is simple, and safety and reliability are achieved.

The invention discloses a centering rotary feeding device, belongs to the technical application field of numerical control inverted lathes, and is used for solving the feeding problem of a large inverted lathe. The device comprises a rotary feeding device and a workpiece centering device, the rotary feeding device is based on a rotary base, longitudinal movement of a sliding seat is achieved through a linear rail and a driving system, a feeding table is driven to rotate by 360 degrees in cooperation with a rotary bearing with a gear ring, and the feeding table is provided with a self-adaptive material table; the workpiece centering device is based on the centering base, the left centering arm and the right centering arm are driven by the bidirectional driving system to move synchronously, and quenching pads on the inner sides of the centering arms are arranged in a V shape to achieve automatic centering of workpieces. The device is made of cast iron materials, so that the rigidity is improved, the maximum bearing capacity is 3200 Kg, the feeding stroke is not smaller than 2500 mm, self-adaptive clamping and precise centering of workpieces can be achieved, the machining auxiliary time is saved, support is provided for development of large inverted lathes, and the device can also be used for other equipment needing feeding and discharging of heavy workpieces.

The invention relates to the technical field of tunneling engineering, and discloses an automatic operation drilling equipment and anchor rod mounting equipment integrated device which comprises a bearing mechanism, a hydraulic telescopic column and a driving assembly, the bearing mechanism comprises an open type bearing seat, a hydraulic telescopic column adaptively mounted in an inner cavity of the open type bearing seat, and the driving assembly is arranged on the outer side of the open type bearing seat; the integrated operation mechanism comprises a rotary bearing seat fixedly arranged on the outer surface of the inner section of the hydraulic telescopic column in a sleeving mode and a drilling assembly arranged on the outer side of the rotary bearing seat through a support. According to the integrated device, integrated operation is achieved, the number of constructors needed by operation of different devices is reduced, the labor cost and the difficulty of personnel coordination are reduced, meanwhile, due to the fact that drilling and anchor rod mounting operation are conducted on the same device, the problems of improper connection, positioning deviation and the like caused by operation of different devices are solved, and the working efficiency is improved. The precision and quality of drilling and anchor rod mounting operation are improved, and the stability of a tunnel structure is guaranteed.

The invention relates to the technical field of differential wheel sets, and discloses a differential wheel set and a transfer robot, the differential wheel set comprises a slewing bearing unit and a differential driving unit, the slewing bearing unit comprises a fixed gear ring and a rotary disc, and the rotary disc and the fixed gear ring are connected and can rotate relatively; the differential driving unit is connected with the rotary disc and is embedded into an inner cavity of the rotary disc; the differential driving unit drives the slewing bearing unit to move through the rotary disk; wherein the differential driving unit is electrically connected with a wire harness, and the wire harness is attached to the lower side surface of the rotary disc, extends out and then is arranged around the peripheral side of the rotary disc. By means of the design, the wire harness can be wound and unwound on the circumferential side of the rotary disc along with rotation of the rotary disc, and the wire harness can be prevented from being excessively twisted and damaged when the rotary disc rotates. Meanwhile, the wire harness is attached to the lower side surface of the rotary disc, extends out of the rotary disc through the lower side surface of the rotary disc and then is wound around the peripheral side of the rotary disc, and the adverse effect of the wire harness on the height of the differential wheel set can be avoided.

The invention discloses a rotary assembled RGV which comprises a frame, a walking driving system, a power supply system, a control system and a rotary supporting platform. The rotary supporting platform is provided with an electromagnetic adsorption supporting block, a slewing bearing, a driving motor and a rotary encoder, 360-degree rotation and accurate positioning of the frame can be achieved, and the frame is fixed through electromagnetic adsorption force. The walking driving system is provided with a mechanical clutch mechanism, and manual pushing emergency movement is supported. And the power supply system adopts non-contact power supply, so that the flexibility and safety are improved. The safety protection system comprises a laser radar and an electronic safety contact edge, and the protection range can be automatically adjusted according to the workpiece size. The addressing positioning system is combined with RFID, a rotary encoder and a magnetic induction switch, and the positioning precision reaches + / -2mm. The control system supports three modes of single-machine remote control, automatic operation and system linkage. The problems that a traditional RGV is difficult in posture adjustment, low in positioning precision and poor in collaboration are solved, the assembling flexibility, efficiency and safety are improved, and the method is suitable for an engineering machinery general assembly line.

The invention discloses a method for replacing a pivotal bearing of a circular stacker-reclaimer in the technical field of stacker-reclaimer maintenance. The method comprises the steps that a trestle and a cantilever are vertically supported; the upper rotary platform is jacked upwards for multiple times through an upper jacking oil cylinder arranged between the support and the upper rotary platform, and an upper rotary bearing is moved out and reassembled; a middle jacking oil cylinder arranged between the jacking tool and the follow-up channel steel is used for jacking the lower rotary platform upwards for multiple times, and a middle rotary bearing is moved out and reassembled; the door-shaped frame is jacked upwards for multiple times through a lower jacking oil cylinder installed between the door-shaped frame and the base, the integral bottom pivotal bearing is broken and dismantled, and the split bottom pivotal bearing is installed. By means of the synchronous jacking method, personnel investment can be reduced, operation time can be shortened, maintenance efficiency can be improved, and maintenance quality and operation safety can be guaranteed.

The utility model relates to a gold welding material taking mechanism. The device comprises a bearing disc, and containing grooves are distributed in the surface of the bearing disc and used for bearing blanks to be welded. The rotary driving device comprises a rotary driving motor, a slewing bearing and a rotary base connected to the upper end of the slewing bearing, the bearing disc is connected to the upper end of the rotary base, and the rotary driving motor can drive the slewing bearing to rotate so as to drive the bearing disc to rotate around the center axis of the bearing disc; the material taking device is arranged beside the bearing disc and comprises a material taking Z-axis linear driving module, a material taking X-axis linear driving module used for driving the material taking Z-axis linear driving module to move in the X-axis direction and a material taking clamping jaw connected with the material taking Z-axis linear driving module. According to the automatic material taking device, the efficient automatic material taking process is achieved, the production efficiency is improved, and the cost is reduced.

The utility model relates to an integrated slewing bearing horizontal type slewing speed reducer which comprises a base, one side of the base is an input end, the input end is connected with a motor input shaft of a motor, the motor input shaft is connected with a turbine worm, a circle of rack is arranged on the top of the middle of the turbine worm, a slewing bearing is arranged above the turbine worm in the base, and the gear worm is connected with the slewing bearing. A gear is arranged at the bottom of the slewing bearing, a rack of the turbine worm is meshed with the gear of the slewing bearing, the slewing bearing is driven to rotate through the turbine worm, a roller path is arranged in the slewing bearing, balls are placed on a circle of the inner side of the roller path, and the slewing bearing is driven to output torque outwards through transmission of the balls. According to the integrated slewing bearing horizontal slewing speed reducer, the base is used for replacing an inner ring of a slewing bearing, the structural form of the speed reducer is simplified, and the overall cost is reduced. The roller path is additionally arranged between the base and the output shaft, the balls are placed in the roller path, the balls are free of sliding loss during transmission operation, and the transmission efficiency can reach 98%-99%.

The corrugated pipe fatigue testing machine comprises a base, a first rotating assembly and a deflection movement assembly, the first rotating assembly comprises a first motor, a first rotating shaft and a first tool, and the first tool is arranged at one end of the first rotating shaft and used for installing a corrugated pipe; the other end of the first rotating shaft is connected with the output end of the first motor; the deflection movement assembly comprises a deflection base, a slewing bearing and a deflection motor, the slewing bearing is arranged on the base, the deflection base is arranged on the slewing bearing and connected with the output end of the deflection motor, a second tool is arranged on the deflection base, and the second tool is rotationally connected with the deflection base and used for being matched with the first tool to fixedly install the corrugated pipe; under driving of the first motor, the first rotating shaft drives the corrugated pipe to axially rotate, and under driving of the deflection motor, the deflection base drives the corrugated pipe to deflect along the axis of the slewing bearing.

The invention relates to the technical field of hoisting equipment, in particular to turnable single-beam electric hoist hoisting equipment which comprises a supporting frame, a fixed rail beam and an electric hoist, the electric hoist comprises a walking mechanism and a hoisting mechanism, and a shaft body is fixed to the middle of the top face of the swing rail beam; the tops of the multiple fixed rail beams are fixed to the top of the supporting frame, the swing rail beams are arranged between the corresponding ends of the two fixed rail beams which are perpendicular to each other, and the shaft body is rotationally connected to the top of the supporting frame in a sleeving mode. A disc with the top face fixedly connected with the bottom face of the walking mechanism is arranged at the top of the hoisting mechanism, the disc is fixedly sleeved with a slewing bearing, the walking mechanism is provided with a power piece in meshing transmission with a rotating outer ring gear ring of the slewing bearing, and a telescopic clamping mechanism is fixed to the rotating outer ring of the slewing bearing in the radial direction. The telescopic clamping mechanism comprises a clamping piece which can move in the radial direction relative to the slewing bearing and is in sliding clamping fit with the bottom of the fixed rail beam in the axial direction. Therefore, the walking direction of the single-beam electric hoist can be adjusted stably and smoothly.

The utility model relates to the technical field of transportation, in particular to a rotary turning turntable which comprises a turntable body, and the turntable body is provided with a track in a fixed structure mode; an internal tooth type pivotal bearing is arranged on the lower end face of the turntable body in a fixed structure mode, a bottom plate is arranged on the lower end face of the internal tooth type pivotal bearing in a fixed structure mode, a gear motor is arranged on the bottom plate in a fixed structure mode, a gear is arranged on an output shaft of the gear motor in a fixed structure mode, and the gear is meshed with the internal tooth type pivotal bearing; a limiting sleeve is arranged outside the inner tooth type slewing bearing in a sleeved mode, at least three sleeves are evenly arranged on the peripheral wall of the limiting sleeve at intervals in the radial direction, the number of the sleeves in the embodiment is three, the sleeves and the limiting sleeve are connected in a fixed structure mode, screw rods are arranged in the sleeves in a sleeved mode, adjusting nuts are arranged on the screw rods in a thread meshing mode, and the adjusting nuts are arranged outside the sleeves. By arranging the sleeve, the screw and the adjusting nut, the periphery of the limiting sleeve and the foundation pit are supported and fixed, the structure is simple, and the installation efficiency is greatly improved.

A marine crane comprises a base, the base is connected with a folding suspension arm through a slewing bearing, the folding suspension arm is formed by sequentially connecting a base section, a middle section and a tail section through hinge shafts, folding of the folding suspension arm is achieved through a first hydraulic cylinder and a second hydraulic cylinder, and the tail section is connected with a hanging scaffold through a connecting sling. A main pulley assembly used for controlling the connecting sling is arranged on the folding suspension arm, a stabilization device is installed on the upper end face of the slewing bearing, the stabilization device is connected with the hanging scaffold through auxiliary ropes, the two auxiliary ropes and the hanging scaffold connected with the sling form a triangular stable structure, and the stabilization device controls stabilization of the hanging scaffold through dragging actions on the auxiliary ropes. According to the marine crane provided by the utility model, the folding suspension arm is folded, so that the occupied space of the crane is reduced; the two auxiliary ropes and the hanging scaffold connected with the sling form a triangular stable structure, so that the hanging scaffold works stably, the slewing bearing drives the folding suspension arm and the stabilization device to rotate synchronously, multi-angle adjustment of the crane is realized, and the occupied volume of the stabilization device is also reduced.

The utility model discloses a slewing bearing platform for a large ocean floating crane system, which belongs to the technical field of engineering machinery and comprises a supporting seat, a rotating component is arranged on the upper surface of the supporting seat and comprises an outer gear ring, the outer gear ring is arranged on the upper surface of the supporting seat and is rotatably connected with the supporting seat, and the outer gear ring is connected with the supporting seat. An outer gear ring is arranged on the upper surface of the supporting seat, an inner gear ring is arranged on the inner wall of the outer gear ring, the inner wall of the outer gear ring is rotationally connected with the outer wall of the inner gear ring, the inner gear ring is fixedly connected to the upper surface of the supporting seat, a plurality of rolling bodies are connected into the inner gear ring, and gear teeth are formed in the inner wall of the inner gear ring. The oil storage ring is directly installed on the inner ring, the space of the inner ring is fully utilized, extra space is not occupied, the whole system is more compact, the annular structure of the oil storage ring can better adapt to the shape of the slewing bearing platform, and it is guaranteed that lubricating oil is evenly distributed in all directions.

The invention discloses a multifunctional super-elevated lifting appliance with switchable forms, which is applied to a container reach stacker and comprises an upper rotary table, a lower rotary table, a main beam, a telescopic beam, supporting legs, a follow-up rotation mechanism, a spin lock device, a mechanical anti-rotation device and various oil cylinders. The upper rotary table and the lower rotary table are connected through a slewing bearing, the main beam and the telescopic beam are connected through a sliding block, a rotating point and an oil cylinder, and the supporting legs and the telescopic beam are connected through a rotating point and an oil cylinder. The supporting legs stretch or retract through stretching of the stretching oil cylinders, the telescopic beams and the supporting leg spin locking devices rotate synchronously in cooperation with the following rotating mechanisms, and the requirement for ultrahigh cargo hoisting is met. When the supporting leg is folded, the mechanical anti-rotation device is limited by the gap of the rotary lock lug and the box landing pin, so that the lock head is prevented from rotating due to external force. Working conditions can be rapidly switched without disassembling the lifting appliance, the working efficiency is improved, the weight of the lifting appliance is reduced to improve the bearing capacity, no extra space is occupied, and the working stability and safety are guaranteed.