12391 results about "Pulley" patented technology

A cutting device includes a base plate, a motor attached to the base plate, a driving cord including a first end and a second end, the first end being attached to the motor, and a cutting assembly. The cutting assembly includes a fixed blade that is fixed to the base plate, and a driven blade that moves with respect to the fixed blade. The second end of the driving cord is attached to the driven blade to move the driven blade with respect to the fixed blade when the motor rotates.

The invention relates to the technical field of railway catenary monitoring, in particular to a multi-source sensing fusion method and system for state evaluation of a catenary compensation device, and the method comprises the steps: obtaining multi-source sensing data such as vibration, temperature and current, generating a phase space trajectory through employing a self-adaptive phase space reconstruction technology, and carrying out the state evaluation of the catenary compensation device; multiple topological features are extracted to form topological feature vectors, and the vectors are combined with temperature and current data to construct a fault probability model. According to the method, the health degree score of the contact network compensation device can be calculated, trend prediction can be carried out, early warning information can be generated, high-precision early warning is realized, the clamping stagnation risk of the pulley block can be predicted three months in advance, passive response is converted into active prevention, the maintenance efficiency and safety of the contact network are remarkably improved, and the maintenance cost is reduced. By means of the innovative technology, the safety of railway operation is improved, the maintenance cost is reduced, and revolutionary transformation is brought to the railway industry.

The invention relates to the technical field of spiral finned tube laser welding, in particular to a solid spinning spiral finned tube laser welding machine. Comprising a first base and a second base, a threaded rod is rotationally connected between the first base and the second base, and the threaded rod is in threaded connection with a machining assembly; the first motor drives the driving belt wheel to rotate, so that the machining assembly conducts welding operation of the spiral fins on the surface of the base tube while moving, and through the transmission relation between the driving belt wheel and the driven belt wheel, the base tube synchronously rotates while the machining assembly conducts moving machining; according to the spiral finned tube machining device, the machining assembly is arranged to meet the welding requirement of the spiral finned tube, movement of the machining assembly and rotation of the base tube are controlled at the same time through the same driving structure, the stability and consistency in the machining process are improved, the machining speed can be adjusted more conveniently, fin welding is more uniform, and the welding quality is effectively improved.

The invention relates to the technical field of six-dimensional force sensor calibration, in particular to a high-precision six-dimensional force sensor calibration device and calibration method. The invention provides a high-precision six-dimensional force sensor calibration device which comprises a base, a calibration platform, a cross force application frame, an S-shaped tension sensor and a fixed pulley. The calibration platform is arranged on the base and is used for fixing the six-dimensional force sensor; the center point of the cross force application frame is connected to the six-dimensional force sensor, a plurality of fixed pulleys are arranged on the calibration platform, a plurality of S-shaped tension sensors are arranged on the cross force application frame, and loads are applied to the S-shaped tension sensors or directly applied to the cross force application frame through connection of a weight set and a rope and guidance of the fixed pulleys. Therefore, a single-dimensional force, a single-dimensional torque, a composite force or a composite torque is applied to the six-dimensional force sensor. Accurate loading of the six-dimensional force sensor is achieved, the device is simple in structure and convenient to operate, independent calibration of single-dimensional force / torque can be achieved, and combined loading can also be conducted.

An on-load tap-changer includes: a tap-changer body and a driving mechanism fixed on the tap-changer body. The tap-changer body includes a housing, multiple insulation fixing plates, multiple turntables, each of which includes a sheave and a cam plate, the cam plate of which is rotatably connected to the insulation fixing plate, and the sheave of which is connected to the driving mechanism, multiple vacuum tubes fixed on the multiple insulation fixing plates, and multiple transmission mechanisms, each of which includes a lifting lever and a reverse spring. When the driving mechanism drives the sheave to regulate voltage, the cam plate is synchronously driven to rotate, and then the vacuum tube is driven by the lifting lever and the reverse spring to achieve on / off arc extinction, thereby achieving on-load voltage regulation.

The invention particularly relates to an underground ventilation system, and belongs to the technical field of ventilation. The underground ventilation system comprises an air duct and a plurality of sliding rail assemblies. Each sliding rail assembly comprises a sliding rail part, a sliding part and a guide ring, the sliding rail parts of the multiple sliding rail assemblies are in butt joint in sequence, guide grooves are formed in the left side and the right side of each sliding rail part respectively, the guide grooves penetrate through the sliding rail parts in the length direction of the sliding rail parts, each sliding part comprises two oppositely-arranged wall parts, the sliding rail parts are arranged between the two wall parts, and the wall parts are rotationally connected with pulleys. The pulley is contained in the guide groove, and the guide ring is arranged corresponding to the sliding part and connected to the sliding part. The air channel sequentially penetrates through the guide rings. The system has the advantage that the air duct position is convenient to adjust.

The invention relates to the technical field of continuum robot control, in particular to an under-actuated active and passive cooperative control device for a continuum robot. The two sections of mechanical arms are connected in a staggered mode to form two sections of continuous mechanical arms moving independently, each mechanical arm is provided with a plurality of bending units which are sequentially connected in the same position, the pre-tightening compensation mechanism is installed on the core body in the circumferential direction, the under-actuated control mechanism is installed on the installation disc, and the first rope is connected with the mechanical arms and the rope fixing plate; one end of the second rope is connected with the mechanical arm, and the other end of the second rope sequentially penetrates through the mechanical arm, the pre-tightening compensation mechanism and the first positioning wheel assembly and then is connected with the rope fixing plate to form a tension compensation loop for the first rope. The two-section continuum structural design is adopted, kinematics dimension reduction is achieved, and the multi-direction bending capacity can be achieved in a narrow space through bionic optimization. A combined type pre-tightening mechanism with a spring and a pulley combined is adopted, rope deformation is passively compensated through an elastic element, and dynamic tension maintaining is achieved.

The invention relates to the technical field of photovoltaic panel welding, in particular to a workpiece feeding device of a bus bar welding machine, which comprises two fixing frames, feeding devices, a supporting device and a pushing device, the uniformly distributed feeding devices are mounted at the top of the fixing frames, the supporting device is arranged between the two fixing frames, and the pushing device is mounted on the top of the fixing frames. The device comprises a fixed frame, a driving motor, a driving shaft, a mounting frame, a fixed plate, a driving belt pulley, a driven belt pulley, a belt main body, a fixed shell, a supporting shell, a supporting wheel, a limiting plate, a threaded rod, a nut, a limiting rod, a rubber ring, a pushing spring and a dismounting main body, the driving belt wheel, the belt main body and the driven belt wheel can be driven to rotate through the driving motor and the driving shaft, the belt main body is attached to the supporting wheel so as to support the belt main body, the belt main body can be attached to the photovoltaic module all the time, and stable feeding of the photovoltaic module is guaranteed.

The utility model discloses a water depth adjusting device of a test pool, and relates to the technical field of deepwater test pools. Comprising a floating bottom body, a lifting mechanism, a jacking device and a distributed detachable platform, each lifting mechanism comprises a winch, a steering pulley and a steel wire rope, one end of the steel wire rope is connected with the winch, and the other end of the steel wire rope bypasses the steering pulley at the bottom of the deepwater experiment pool and is connected with the floating bottom body; the jacking device comprises an air cylinder, a connecting shaft, a guide wheel and a base, the air cylinder located on the base is connected with the guide wheel through the connecting shaft, and the guide wheel is connected with the guide sliding groove of the floating bottom body in a clamped mode; the jacking devices are symmetrically arranged on the two sides of the floating bottom body. The distributed detachable platform is laid on the floating bottom body through the connecting support. The device can meet the water depth requirement in an ocean engineering experiment, meet the ground elevation requirement in a civil engineering experiment and a wind tunnel experiment, and meet the requirement that the floating bottom does not move, rotate or get stuck in the operation process of experimental equipment.

The invention discloses a contact network wire straightness monitoring device, belongs to the technical field of straightness monitoring, and provides the following scheme that the contact network wire straightness monitoring device comprises a straightness monitoring mechanism, an auxiliary mechanism is arranged on the straightness monitoring mechanism, the straightness monitoring mechanism comprises a supporting plate, and monitoring equipment is arranged on the supporting plate; according to the invention, translation detection is carried out on the wire through the straightness monitoring mechanism, and during conventional detection, the lower pulley drives the shaft disc to drive the piston assembly to move, so that the rolling ball can slide in the rail groove, rotation of the rotating rail is realized, the detection assembly can carry out comprehensive detection around the circumferential direction of the wire, and the detection efficiency is improved in the detection process. On one hand, the position detection accuracy is improved through multi-dimensional detection data fusion, on the other hand, a conventional detection result is rechecked according to an omnibearing detection result and image data, when a flatness defect is recognized, a maintainer can visually confirm the shape and position of the defect through a corresponding image, and the problem of misjudgment or missed judgment is avoided.

The invention provides a ribbon loom driven by horizontally opposed crankshafts, which comprises a base rack provided with a crankcase, a crankshaft driving assembly is arranged in the crankcase and drives a heald frame opening mechanism through a connecting rod, and a cloth tape winding mechanism, a weaving mechanism and a weft yarn feeding mechanism are further arranged above the crankcase. The crankshaft driving assembly comprises a rear crankshaft set and a front crankshaft set which are horizontally and oppositely arranged, a first synchronous wheel and a second synchronous wheel in the rear crankshaft set are connected through a rear main shaft piece, and a driving belt wheel is installed on a motor piece and connected with the first synchronous wheel through a first synchronous belt. The front crankshaft set and the rear crankshaft set are driven to rotate synchronously, all heald frame openings in the heald frame opening mechanism operate synchronously according to the preset opening rhythm, openings are formed through the heald frame set, the openings reach the weaving mechanism to be woven into cloth belts, and then the cloth belts are wound into a container through the winding mechanism. The vibration and noise of the machine are reduced, and the overall processing efficiency of the ribbon loom is improved.

The invention provides an internal flow field balancing device for a magnetic transmission high-temperature and high-pressure closed container. Comprising a pulley, a transmission mechanism, a clutch, a turbulent flow mechanism, a frequency modulation motor and a magnetic transmission mechanism, a rotating cage is arranged on the pulley and is driven to rotate through a rotating mechanism; a tray is hung on the rotating cage, and an accommodating object is accommodated on the tray; the transmission mechanism is arranged at the closed end of the tank body; one end of the clutch is connected with the transmission mechanism; the turbulence mechanism is provided with a transmission shaft, blades and a driving gear are arranged at the extension end of the transmission shaft, the blades are used for adjusting airflow distribution in the tank body, and the driving gear is connected with the input end of the transmission mechanism and used for driving the transmission mechanism; the magnetic transmission mechanism is a non-contact coupling for transmitting torque through magnetic field force, is arranged in the middle of the outer side of the sealing head at the closed end of the tank body and transmits torque to the closed space of the tank body; the frequency modulation motor is connected with the magnetic transmission mechanism and used for driving the transmission shaft to rotate. Three flow field balancing modes are provided for use.

The present application generally relates to an exercise machine. The exercise machine comprises a body, a physical weight, an electromechanical resistance module, a pulley system attached to the body and a user interface. The physical weight provides a first resistance source for a first cable, while the electromechanical resistance module provides a second resistance source for a second cable. The pulley system is configured to integrate a resistance from the first and second resistance sources into a single output resistance by guiding the first cable and second cable to an adapter to which the first cable and the second cable are attached. The user interface is connected to the adapter and serves to apply a force against the single output resistance.

The invention discloses a welding mistake proofing device for a new energy automobile welding part, and relates to the technical field of welding equipment. The laser welding device comprises a base, an adjusting ring is arranged on the top of the base, and a laser welding head is installed in the adjusting ring; a detection assembly is arranged at the top of the base and comprises a supporting shell installed on one side of the adjusting ring. Through the synergistic effect of the detection assembly and the adjusting assembly, real-time monitoring and angle dynamic adjustment of the fitting degree of two sets of pipeline workpieces are achieved, a pressure sensor can accurately recognize the eccentricity or dislocation problem during pipeline butt joint through pulley stress feedback, a driving motor is matched with a belt transmission system to drive an adjusting ring to rotate, and the fitting degree of the two sets of pipeline workpieces is adjusted. Compared with a traditional single-pipeline clamping device, the alignment problem during double-pipeline splicing is effectively solved, the problems of insufficient weld joint strength, poor sealing performance and the like caused by eccentricity are avoided, and the welding quality and the reliability of a new energy automobile pipeline system are remarkably improved.

The invention provides a big data-based building construction safety assessment method, which comprises the following steps of: acquiring a tension distribution gradient, a local stress peak value, a tension fluctuation frequency and a pulley contact surface friction coefficient of a tower crane steel wire rope under a dynamic working condition, and determining a dynamic stress distribution characteristic of the steel wire rope; performing real-time data screening and peak value identification processing on the dynamic stress distribution characteristics to obtain a stress concentration coefficient distribution diagram of each measuring point, and determining a tension concentration area with the stress concentration coefficient higher than a preset threshold value; carrying out weighted adjustment on the non-uniform wear characteristics, calculating to obtain the surface wear depth, the wear particle size and the weight change of the contact surface temperature rise under different working conditions, and obtaining the real-time wear index weight distribution; and aiming at the real-time wear index weight distribution, combining the tension distribution gradient and the wear region area in the historical operation data, and analyzing and predicting the change trend of the surface roughness of the steel wire rope through wear trend fitting and load history to obtain a residual life prediction value.

The utility model relates to an active load adjusting bridge system for a cutter suction dredger. Comprising a bridge frame, the root of the bridge frame is hinged to a cutter suction dredger body, a mud pump assembly and a mud pipeline are installed in the middle of the bridge frame, and a reamer assembly is installed at the end of the bridge frame; a portal frame is installed at the position of a bow of the cutter suction dredger body, a pulley system is installed at the top of the portal frame, a lifting pulley is installed at the top of the end of the bridge frame, a lifting winch is further installed on the cutter suction dredger body, and a lifting steel cable collected and released by the lifting winch is wound on the pulley system and the lifting pulley. And a hydraulic load assembly for exerting an active pushing effect on the bridge frame is further mounted between the cutter suction dredger body and the bridge frame. According to the active load adjusting bridge system for the cutter suction dredger, active load control is applied in a hard soil excavation scene, so that the reamer assembly can effectively feed in a water bottom mud surface, smooth construction is achieved, and excavation construction efficiency is guaranteed.

The invention discloses a displacement monitoring device for a fast gate of an impedance type surge chamber, and relates to the technical field of hydraulic engineering, the displacement monitoring device comprises a steel wire rope, a steering assembly, a swing arm assembly and a displacement sensor, the steering assembly comprises a pulley yoke and a first fixed pulley, and the pulley yoke is installed on a surge chamber platform and arranged over the fast gate in an opposite mode; the first fixed pulley is installed on the pulley frame, the swing arm assembly comprises a swing arm, a swing arm frame, a second fixed pulley and a hydraulic damper, the swing arm frame is installed on the surge chamber platform, the hinged end of the swing arm is installed on the swing arm frame, the second fixed pulley is installed at the swing end of the swing arm, and the hydraulic damper is connected between the swing arm frame and the swing arm; the displacement sensor is arranged on the surge chamber platform; the lower end of the steel wire rope is connected to the quick gate, the upper end of the steel wire rope extends to the water surface and sequentially bypasses the first fixed pulley and the second fixed pulley to be connected to the displacement sensor, and the displacement sensor is used for obtaining displacement of the upper end of the steel wire rope to monitor vertical displacement of the quick gate.

The invention provides a marine intelligent test device, which comprises a heave measurement unit, a tension detection device, a winch, a telescopic mechanism and a control unit, and is characterized in that the heave measurement unit is used for measuring a heave signal of a ship body and transmitting the heave signal of the ship body to the control unit; the winch is used for winding and unwinding a cable, the telescopic mechanism comprises a pulley block used for guiding the cable, the pulley block is installed on a telescopic beam, the telescopic beam is connected with a telescopic driving device used for driving the telescopic beam to horizontally move, and the cable of the winch penetrates through the pulley block on the telescopic mechanism to be connected with a tested object; the tension detection device is used for detecting the tension on the cable and transmitting a tension signal to the control unit; and the control unit is used for receiving the heave signal and the tension signal, outputting a first control signal to the winch according to the heave signal and the tension signal so as to realize winding and unwinding of the cable, and outputting a second control signal to the telescopic driving device so as to realize expansion or retraction of the telescopic beam.

This invention discloses a laminating device for processing insulation boards, belonging to the field of insulation board processing. The laminating device includes a laminating chamber with three sets of feeding troughs on its side wall. Within each feeding trough, a driven roller, a first suction roller, a second suction roller, and a driving roller are rotatably connected from top to bottom. Three sets of top-loading telescopic rods are evenly spaced at the bottom of the laminating chamber. Guide rails are fixedly connected to both sides of the top of the laminating chamber. This invention utilizes the suction force generated within the suction disc by rotating suction blades, which removes dust from the bonding surface of the raw material board that has passed over the top of the first and second suction rollers, improving the cleanliness of the bonding surface and ensuring subsequent bonding effectiveness. Furthermore, a second pulley assembly agitates the adhesive liquid within the adhesive storage box, effectively preventing coagulation and sedimentation of the adhesive liquid and improving its usability.

The invention is applicable to the technical field of wiredrawing, and provides an alloy wire lubricating and cooling device for wiredrawing production, which comprises a main body assembly, the main body assembly comprises a wiredrawing box, two cone pulleys are rotatably arranged in the wiredrawing box, and a lubricating and cooling assembly, a mold frame assembly and a limiting assembly are mounted in the wiredrawing box. The device solves the problems that the wire drawing oil is driven to splash under the impact force of wire drawing of a steel wire, impurities such as metal chips and mold powder retained in accumulated oil are splashed back along with the splashed oil, so that the impurities in a mold hole are accumulated, the surface of the steel wire is scratched, an oil film attachment foundation is damaged, the impurities are embedded into the oil film to form abrasive particles, oil film breakage is accelerated, and the lubricating effect of the wire drawing oil is finally influenced. According to the device, the wire-drawing die is staggered by arranging the wedge block top limiting plate, the oblique flow groove of the convex block and the partition plate, the effects of guiding oil impurities to be smoothly discharged and reducing accumulation and splashing of the oil impurities at the die position are achieved, and the conditions that the impurities scratch the surface of a steel wire and damage an oil film are avoided.

An apparatus equipped with a cable stretch variation system comprising three horizontal and parallel platforms, vertically movable, together or separately, when pulled by a steel cable “C”. Each platform is traversed by the columns and is provided with a respective pulley. On the top platform, mobile carriages are mounted, whose rollers slide vertically along the columns. At least two platforms and are provided with a respective through-hole for inserting a locking selector pin, which is the determining element of the cable stretch variation positions, corresponding to the use of the machine in the 2×1, 4×1 or 6×1 ratios.

The utility model discloses a resistance module connecting structure and fitness equipment, and the resistance module connecting structure comprises a rack; the load assembly is connected to the rack, and the load assembly comprises a load motor and a movable part; the output assembly is connected to the rack and comprises a connecting block, a movable pulley, a connecting rope and a stretching part which are sequentially connected, the connecting block is fixed to the movable part, the movable pulley is rotationally installed on the connecting block, and the connecting rope is wound around the movable pulley and extends outwards; wherein the load motor can output load force, and the stretching part is suitable for being pulled outwards so as to drive the connecting rope, the movable pulley, the connecting block and the movable part to move together; the load motor is in transmission connection with the movable part and used for driving the movable part to reset. A transmission structure is obviously optimized, the stretchable displacement range in the operation and use process of players is enlarged, the problem that ropes are folded is reduced or even avoided, and the stability and smoothness of power transmission are improved.

A charger according to the present embodiment may comprise a cover having a space formed in the cover; a first pulley guide and a second pulley guide disposed in the cover; a first moving pulley guided by the first pulley guide and moved by a charging cable; a second moving pulley guided by the second pulley guide and moved by the charging cable; and a damper installed on one of the first moving pulley and the second moving pulley.

The present disclosure relates to a method for an elevator safety system, and to a computer-readable medium therefor. Provided is an abnormal sign-detecting elevator that can prevent safety-related accidents by means of various sensors, the elevator (20) comprising an elevator car (21), a governor (22), and a rope (23), wherein the elevator car (21) can move vertically along guide rails (25), the governor (22) comprises an upper sheave (22a) and a lower sheave (22b), and the rope (23) winds around the upper sheave (22a) and lower sheave (22b).

The invention relates to the technical field of rotary kilns, and particularly discloses a modular adjustable center heating rotary kiln which comprises a kiln body, a center heating module and an outer wall. The kiln body is of an annular hollow rotatable barrel structure and is composed of an outer sleeve and an inner sleeve, and a supporting structure is arranged between the outer sleeve and the inner sleeve. Two ends of the outer sleeve and the inner sleeve are provided with belt wheel supports, and one end is provided with a driving motor; annular sealing devices are arranged at two ends of the kiln body; the annular sealing device is provided with a feed port and a discharge port; the central heating module consists of a plurality of heating units, a truss supporting structure, a power supply bus and a control part; the power bus is fixed on the truss supporting structure and penetrates through the interior of the inner sleeve; the plurality of heating units are connected with the power supply bus and can slide along the truss supporting structure to adjust the position, the number and the density; the control part is composed of a control system, a communication bus and an execution mechanism. The thermal conversion efficiency, the energy utilization rate and the temperature field balance of the rotary kiln can be effectively improved.

Disclosed is an adjustable arm device for cable training. The adjustable arm device has a mounting base fitted on a vertical frame, a locking component for locking the mounting base, a swing arm having a guide pulley at its connecting end for the training cable to slide against, a swivel pulley housing at the extending end of the swing arm, a vertically adjustable joint at the connecting end of the swing arm including a horizontal support shaft, a vertical positioning seat, a vertical angle locking component that allows vertical swinging, a horizontal adjustable joint on the mounting base below the vertical joint, including a vertical support shaft, a horizontal positioning seat, a horizontal angle locking component that allows horizontal swinging, and a cable passage between the connecting end of the swing arm and the swivel pulley housing for passage of the training cable.

A door open-close device for a vehicle configured to open or close a door opening portion by sliding and popping up a door formed in a vehicle body includes a driving unit configured to provide a driving force for sliding and pop-up operations of the door; a gear unit configured to receive the driving force from the driving unit and cause the door to pop up; a pulley-belt unit configured to receive the driving force from the driving unit and allow the door to slide; and a rail unit engaged to the pulley-belt unit, connected to the door and configured to provide a path for the door to slide by operation of the pulley-belt unit.

The invention belongs to the technical field of vibration control, and discloses a tuned mass damping device for controlling low-frequency vertical bending vortex vibration of a large-span bridge, which consists of a fixed pulley, a mass block, a high-strength light force transmission cable, a spring, a hanging ring and a damper. Fixed pulleys and mass blocks are arranged at the positive and negative maximum displacement positions of a longitudinal bridge direction mode of a main beam respectively, a suspension system is formed by a full-length force transmission cable, and the gravity of the two mass blocks is basically balanced; the mass block is connected through the spring and is close to the bridge vibration control target frequency. When the bridge vibrates, the two mass blocks generate inertia forces which are opposite in direction but overlapped with each other, the driving system and the bridge form resonance, and therefore bridge vibration is effectively restrained. The gravity of the mass block can be self-balanced, the strength and the number of the springs are greatly reduced compared with those of a traditional TMD, any low-frequency tuning can be conducted in a vertical limited space, and the engineering cost is remarkably reduced. The device can be used for controlling vertical bending and torsional vibration of various engineering structures; the damper is replaced by an actuator, so that active control can be realized or the damper can be used as a structural excitation device.

Apparatus and associated methods relate to a cabled workout tower (CWT). In an illustrative example, the CWT includes a platform including a proximal base supporting opposing vertical supports extending along a longitudinal axis to a distal affixed pullup module. The CWT includes a weight platform including weight stacks housed. The CWT includes a pulley guided cable system operatively connected to cables with pulleys, including a distal weight platform pulley operatively coupled to a double pulley device. An upper pulley portion operatively couples to a distal base platform pulley and a proximal pull handle by an upper cable. A lower pulley portion operatively couples to an anchored weight proximal pulley anchored to a proximal base platform pulley coupled to a proximal pull handle. Various embodiments may advantageously enable users to perform hanging exercises from the pull up bar and weighted abdominal exercises by engaging the proximal pull handle.

The utility model discloses a transmission device for handicrafts, which comprises a mounting plate, a driving mechanism for driving a visual mechanism to rotate, a transmission mechanism and a forward and reverse rotation mechanism, and the mounting plate is vertically arranged; the driving mechanism comprises a motor; the motor is arranged at the lower part of the front side surface of the mounting plate; the transmission mechanism is in transmission connection with an output shaft of the motor; the visual mechanism comprises a rotating shaft, an inner visual assembly and an outer visual assembly; the rear end of the rotating shaft is rotationally connected with the upper part of the front side surface of the mounting plate; the inner visual component and the outer visual component are sleeved on the rotating shaft; the forward and reverse rotation mechanism comprises a main belt pulley, a forward rotation assembly and a reverse rotation assembly; the main belt pulley is connected with the transmission mechanism; the forward rotating assembly is connected with the main belt wheel and the rotating shaft. And the reversing assembly is respectively connected with the main belt pulley and the inner visual assembly. According to the utility model, the duration of the dynamic visual handicraft can be prolonged, the visual effect is improved, and the experience feeling is enhanced.