46results about How to "Elasticity adjustment" patented technology

The invention relates to the technical field of medical apparatuses and instruments and discloses a passive knee-joint power-assist robot. The passive knee-joint power-assist robot comprises a thigh fixing group, a crus fixing group and a knee-joint power assisting device. The thigh fixing group is used for fixing a thigh, the crus fixing group is used for being fixed to a crus, and by arrangementof the knee-joint power assisting device, energy accumulation in knee bending action of the thigh and the crus can be realized. When the thigh and the crus reset after knee bending, energy accumulated by the knee-joint power assisting device can be converted into kinetic energy to assist the crus on the crus fixing group and the thigh on the thigh fixing group in reset action, and further, the human knee joint can be assisted in stretching to further assist a human body in walking or exercising, so that the knee joint of a user is protected, and the knee joint burden of the user is relieved.The passive knee-joint power-assist robot is suitable for knee protection of healthy people in mountaineering and also applicable to assisted walking of sub-healthy people with knee injuries.

The invention provides a chain type cutter assembly structure comprising a cutter body, a sliding formwork telescopic cylinder, a chain cutter, a sliding form, a drive device, an erecting formwork opening and closing cylinder, an erecting form and a grouting pipe. The drive device is movably arranged on the cutter body. The chain cutter is assembled on the cutter body and meshed with the drive device. The sliding form is movably connected with the cutter body. The tail end of the sliding formwork telescopic cylinder is movably connected with the cutter body, and the front end of the sliding formwork telescopic cylinder is movably arranged on the sliding form. The grouting pipe is arranged on the sliding form which is provided with a grout outlet communicated with the grouting pipe. The upper end of the erecting form is movably arranged on the sliding form. Two ends of the erecting formwork opening and closing cylinder are arranged on the sliding form and the erecting form respectively. The chain type cutter assembly structure is simple in the whole structure; the cutter body, the chain cutter, the drive device and a driven device form a grooving mechanism to drive the chain cutter to move, so that feed cutting and annular cutting are achieved; the sliding form, the erecting form, the erecting formwork opening and closing cylinder and the grouting pipe form a concrete synchronous grouting mechanism to do synchronous motion with the grooving mechanism, thus synchronous grouting is achieved.

The invention discloses a rope tightness adjusting part and an application thereof. The rope tightness adjusting part comprises a spring, a guide rod and a mounting base, wherein a guide groove is formed inside the mounting base, the spring is arranged in the guide groove, and the tail part of the spring abuts against a groove wall of the guide groove; one end of the guide rod penetrates through the guide groove and abuts against a head part of the spring, and the other end of the guide rod extends out of the guide groove and abuts against the rope; the guide rod slides along the guide grooveunder the action force of the rope so as to adjust the tightness of the rope; and the rope tightness adjusting part can be applied to an anti-loose balance device and a centrifugal vibration equipment. Self-adaptive adjustment can be carried out on the rope according to the tightness of the rope by the rope tightness adjusting part, so that a method is simple, the practicability is high, and an effect is good.

The invention discloses a leg rehabilitation instrument, which comprises a machine body, a motor, a support frame, a power supply device and a control device, wherein the machine body comprises a pedaling plate, a protection tool, an electrode plate and a resistance regulator; the pedaling plate is connected with the motor, and is driven by the motor to rotate; the resistance regulator is electrically connected with the control device and prevents the rotation of a motor fly wheel; the lower limb of a patient is limited and fixed by the protection tool; the electrode plate is fixed onto the inner side of the protection tool and is in contact with and connected with the lower limb of the patient; the support frame comprises a vertical rod, a first circular ring and a second circular; a plurality of first safety belts for fixing the waist of the patient are arranged on the first circular ring; a plurality of second safety belts for fixing the armpit and the shoulder of the patient are arranged on the second circular ring. The leg rehabilitation instrument has the advantages that the muscle equal length contraction training, passive training, active training and load bearing trainingcan be performed by the patients; various training measures are used for performing comprehensive rehabilitation on the sick limbs; the sick limbs are rehabilitated and trained from the first stage inthe whole process; the best sick limb rehabilitation effect can be reached.

The invention relates to a chain type discharging mechanism of a self-dumping tractor-semitrailer. The chain type discharging mechanism comprises a plurality of chains arranged at intervals, a plurality of conveying belts covering the chains are sequentially arranged on the chains, one end of each conveying belt is installed on a belt cross beam, the other end of each conveying belt is a free end,and the belt cross beams are detachably arranged on the chains; a limiting protrusion is arranged at the upper end of an outer chain plate in each chain, a limiting groove matched with the corresponding limiting protrusion is formed in each belt cross beam, each belt cross beam is flatly arranged on the corresponding outer chain plate, and each limiting groove is clamped on the corresponding limiting protrusion; and the limiting protrusions are matched with the limiting grooves to limit the belt cross beams in the horizontal direction, pin shaft installation holes are formed in the limiting protrusions, and pin shafts and pins used for limiting the belt cross beams in the vertical direction are detachably arranged on the pin shaft installation holes. The chain type discharging mechanism has the advantages that the structural design is reasonable, the conveying belts are convenient to disassemble, the chains are convenient to maintain, and the conveying belts are well matched with longitudinal beams.

The invention provides a protecting finger sleeves for manual tea leaf picking. The sleeves comprise a thumb sleeve and a forefinger sleeve, the thumb sleeve and the forefinger sleeve comprise wearingports and finger end parts, the wearing port of the thumb sleeve is fixedly connected with the wearing port of the forefinger sleeve, the thumb sleeve fits the thumb of human, the forefinger sleeve fits the forefinger of human, the thumb sleeve and the forefinger sleeve are arranged splayed, the thumb sleeve and the forefinger sleeve are soft, the surface of the thumb sleeve is sleeved with a rubber finger ring sleeve, the front face of the rubber finger ring sleeve is fixedly connected with a fitting block, the back of the fitting block fits the surface of the forefinger, and the front faceof the fitting block is fixedly connected with a clamping block. According to the protecting finger sleeves, when squeezing air bags are not subjected to force, the surfaces of sealed protrusions areconcave to allow clamping pieces to be retracted in concave parts, therefore the clamping pieces are hidden, the scratching on pickers caused by the appeared clamping pieces when the clamping pieces are not used is prevented, and the safety performance is improved.

The invention discloses an electric chain saw chain tightness adjusting device. The electric chain saw chain tightness adjusting device comprises a machine frame, a chain wheel, a chain board and a chain. The chain wheel is connected on the machine frame in a rotating mode. The chain board is arranged on the machine frame. The chain is arranged on the chain board and driven by the chain wheel. An adjusting device is arranged on the chain board, and the adjusting device is used for adjusting the relative distance between the chain board and the chain wheel so that the chain can be loosened or tensioned. The adjusting device comprises a gear driving device and a position-limit device, wherein the gear driving device drives the chain board to move, and the position-limit device drives the chain board to move back and forth relative to the machine frame. By means of the electric chain saw chain tightness adjusting device, tightness of the chain can be conveniently adjusted, operability can be enhanced, and security risks can be effectively avoided.

The invention belongs to the technical field of printing and coating rollers, and particularly relates to an integral rubber blanket strip pressing type structure of a single iron sheet printing and coating roller. The integral rubber blanket strip pressing type structure comprises a rolling barrel, rotating rods are fixedly connected to the two sides of the rolling barrel, bearings are fixedly connected to the rotating rods in a sleeving manner, a groove is formed in the roller, a plurality of threaded grooves are formed in the inner bottom end of the groove, screws are arranged in the threaded grooves, the upper ends of the screws extend to the outer sides of the threaded grooves, and a pressing plate sleeves the screws through threads. According to the integral rubber blanket strip pressing type structure, different types of printing can be realized by replacing different types of rubber blankets, so that a large amount of printing and coating rubber rollers with different specifications are not needed to be prepared, then a large amount of storage space is saved, funds are saved, and the labor intensity of workers is reduced.

The invention relates to an automatic detection device for electrical performance of an electric energy meter. The automatic detection device comprises a detection meter and a pressing assembly, wherein the detection meter is electrically connected with the electric energy meter, and the pressing assembly is used for clamping the electric energy meter. The detection meter is provided with a plurality of binding posts, the binding posts correspond to wiring holes formed in the electric energy meter, guiding rods are arranged at the two ends of the detection meter respectively, a guiding channel is formed between the two guiding rods, and the binding posts are arranged in the guiding channel. The pressing assembly comprises an air cylinder and a push plate, wherein the air cylinder is correspondingly arranged on one side of the guiding channel, the push plate is fixed to the output end of the air cylinder, the electric energy meter is connected with the detection meter through the air cylinder and the push plate, and the binding posts are sleeved with elastic rubber rings. According to the automatic detection device for the electrical performance of the electric energy meter, manual operation is replaced, and manpower of workers is saved; meanwhile, due to the fact that the binding posts are sleeved with the insulating elastic rubber rings, the phenomenon that the binding posts are exposed and cause dangers can be avoided, the detected electric energy meter can be automatically separated from the detection meter, and safety is greatly improved.

The invention relates to a movable gripper insulating rod. The movable gripper insulating rod comprises a working piece, a movable connecting piece and an insulating rod, wherein the working piece comprises a movable clamp, a supporting steel wire and an elastic adjuster; the movable connecting piece comprises a rotating cover and a universal joint; one end of the movable clamp is in pin-shaft connection with the upper part of a movable clamp fixed foot; the supporting steel wire is arranged at the upper end of the movable clamp fixed foot; the lower end of the movable clamp fixed foot is fixedly connected with the upper end of a universal joint screw rod; the inner wall of the elastic adjuster is attached to the outer wall of the movable clamp, and the bottom of the elastic adjuster is inthreaded connection with the upper part of the universal joint screw rod; the lower part of the universal joint screw rod penetrates through the rotary cover to be in threaded connection with the upper end of the universal joint; and the lower end of the universal joint is fixed on the insulating rod through a universal shaft rod. The movable gripper insulating rod is simple in structure, and thework piece and the insulating rod are connected through the universal joint, so that a certain included angle is formed when people operate on the ground during opening and closing; and the rotatingrange of the universal joint is limited through the rotating cover, so that the movable gripper insulating rod is convenient to operate.

The invention provides a pair of high-waisted abdomen supporting trousers for a pregnant woman. The pair of trousers comprises a trouser body, wherein the trouser body comprises a front sheet, a rear sheet and a crotch part; one end of the crotch part is connected to the front sheet and the other end is connected to the rear sheet; two sides of the front and rear sheets are connected, so that an integral body is formed; the pair of high-waisted abdomen supporting trousers is additionally provided with a abdomen supporting strap; the abdomen supporting strap is designed in the form of a crossed collar with a fixed end connected to the crotch part while a movable end winding to the top of the rear sheet from the bottom of the front sheet and then fixedly connected to the top of the rear sheet; a hip lifting line is additionally seamed on the rear sheet in the direction of an axial line; and the hip lifting line follows an Z-shaped seaming direction. The pair of high-waisted abdomen supporting trousers provided by the invention is simple in structure; the pair of high-waisted abdomen supporting trousers is applicable to the pregnant woman in a pregnancy period, so as to guarantee the health of a fetus; and meanwhile, the pair of high-waisted abdomen supporting trousers can also guarantee figure recovery and keeping of the pregnant woman after the pregnancy period.

The invention provides a device for coiling a half-product zero-degree belted layer. The device for coiling the half-product zero-degree belted layer comprises a first guide roller, a machine frame rack, a second guide roller, a baffle, a track, a pull rod, a cylinder, a chuck and a driving motor. The first guide roller and the second guide roller are arranged at the front end of the machine framein an assembled mode. The first guide roller is arranged on the left side of the second guide roller, the chuck is mounted at the front end of the driving motor in an assembled mode, and the pull rodis arranged on the lower side of the chuck. The cylinder is fixed to the rear end of the pull rod, the cylinder is arranged on the left side of the driving motor, the track is arranged on the left side of the pull rod, and the baffle is arranged on the left side of the track. The design has high control precision, low noise, convenient use and operation, high control precision and improves the coiling effect.

The invention belongs to the technical field of foam cutting tools, and particularly relates to a foam cutting machine. The foam cutting machine comprises a workbench, and is characterized in that a rotary adjusting disc is arranged on the workbench; a single gantry shaft Y is arranged on one side of the workbench; a single gantry shaft X is arranged at the upper end of the single gantry shaft Y; one end of the single gantry shaft X is connected with an electric heating wire adjusting device; an electric heating wire is connected to the electric heating wire adjusting device; one end of the electric heating wire is arranged on the electric heating wire adjusting device, and the other end of the electric heating wire is arranged on a sliding assembly of the workbench; and the position of the electric heating wire on the workbench can be adjusted through the electric heating wire adjusting device and the sliding assembly. The foam cutting machine has the beneficial effects that the single part production speed is effectively controlled; the cost is reduced; the quality is improved; and one-time cutting of a complex curved face can be guaranteed, and shaping is not needed.

The invention discloses a multifunctional wig sewing three-head weft machine, and belongs to the technical field of wig product equipment. The multifunctional wig sewing three-head weft machine comprises a sewing machine and a working table, wherein a primary-shaft installing table and a secondary-shaft installing table which form a group are fixedly installed at the top of the working table, spring-back grooves are formed in the top of the working table, guide cylinders are fixedly connected to the bottoms of the spring-back grooves, springs are arranged inside the guide cylinders, and are fixed at the bottoms of the spring-back grooves, and spring-back plates are fixedly connected to the tops of the springs, and are located on the spring-back grooves; a collecting box is fixedly connected below the working table, an air suction device is fixedly installed on the inner wall of the collecting box, a hair roller is arranged in the middle of the collecting box, the two ends of the hair roller are rotationally connected on the side walls of the collecting box, an air guiding plate is fixedly connected to the front end of the collecting box, a carding through groove is formed in the top of the working table, carding shafts are rotationally connected to the two side walls of the carding through groove, and a carding belt is arranged between the two carding shafts. By means of the multifunctional wig sewing three-head weft machine, in the sewing process, hairlines are straightened out, fallen hairlines are collected, and tension and relaxation of wig strips can be flexibly adjusted.

The invention discloses an industrial filter cloth cutting device with an edge sealing function, and relates to the technical field of cutting equipment. The problem that filter cloth is bent due to heating and edge sealing during cutting is solved. The industrial filter cloth cutting device specifically comprises a workbench and a cutting frame, wherein connecting columns are welded to the two sides of the inner wall of the cutting frame, a first rotating rod is rotatably connected to the inner walls of the connecting columns, and a cutting tool is fixed to the outer wall, located between thetwo connecting columns, of the first rotating rods through screws. By arranging the cutting frame, the cutting tool is driven to rotate to cut the filter cloth, when the cutting frame moves, auxiliary mechanisms on the two sides of the cutting tool can be used for smoothing the filter cloth to achieve the purpose of assisting in cutting, and creases are prevented; and then a second electric pushrod is controlled to make a heating roller make contact with the filter cloth, a heating wire is used for sealing the edge of the filter cloth, and the heating roller can rotate along the cut filter cloth, so that the filter cloth can be prevented from being bent during heating and edge sealing of the filter cloth.

The invention discloses a mechanical sport protective glove. The mechanical sport protective glove comprises a palm sleeve, a controller and finger sleeves. An elastic hook-and-loop fastener is arranged at the front end of the palm sleeve, an elastic band is arranged on one side of the elastic hook-and-loop fastener, the controller is arranged above the elastic hook-and-loop fastener, and buttons,a power switch and a display screen are arranged on the controller. An electric cable fixing ring is arranged at the upper end of the controller, an electric cable is arranged at the upper end of theelectric cable fixing ring, a pressure sensor is arranged at the upper end of the electric cable, and a palm protective rubber pad is arranged at the rear end of the pressure sensor. The finger sleeves are arranged above the palm protective rubber pad and provided with finger protective rubber pads, and a joint protective rubber pad is arranged at the rear end of the palm sleeve. The mechanical sport protective glove has the advantages that the structure is simple, the manufacturing cost is low, and the intelligence degree is high; elasticity of the wrist can be adjusted by the elastic band,and the protective glove is comfortable and convenient; the controller achieves intelligent protection through the buttons and the display screen, the protection effect is good, and the performance isstable.

The invention discloses a portable VR viewing device based on cultural tourism service, and belongs to the technical field of viewing devices. The portable VR viewing device comprises a mask, two fixing plates are fixedly connected in the mask, a plurality of clamping grooves are formed in the two fixing plates, clamping blocks are clamped in the clamping grooves, one end of each clamping block isfixedly connected with VR glasses, a rubber fixing ring is fixedly connected with the rear end of the VR glasses, a first fixing belt is fixedly connected with one side of the mask, a hook-and-loop fastener is arranged on the surface of the first fixing belt, and a second fixing belt is fixedly connected with the other side of the mask. According to the portable VR viewing device based on cultural tourism service, the clamping grooves, the clamping blocks and the VR glasses are arranged, and the VR glasses can be fixed on the fixing plates by clamping the clamping blocks in the clamping grooves, so that a user can conveniently adjust the height of the VR glasses, users with different eye heights can conveniently use the VR glasses, the viewing effect is good, and the working efficiency ofVR equipment is improved.

The invention discloses an electric chain saw chain elasticity adjusting device. The electric chain saw chain elasticity adjusting device comprises a machine frame, a chain wheel, a chain board and a chain, wherein the chain wheel is connected with the machine frame in a rotating mode, and the chain board is arranged on the machine frame. The chain is arranged on the chain board and is driven by the chain wheel. The chain board is provided with an adjusting device, wherein the adjusting device adjusts the distance of the chain board relative to the chain wheel and enables the chain to be loosened or tensioned. The adjusting device comprises a worm and gear device and a limiting device, wherein the worm and gear device drives the chain board to move, and the limiting device moves forward and backward relative to the machine frame. According to the electric chain saw chain elasticity adjusting device, the elasticity of the chain can be adjusted conveniently, the operability is strengthened, and the potential safety hazard is effectively avoided.

The invention belongs to the technical field of automatic feeding, and particularly relates to an automatic feeding device for numerical control cutting equipment. The automatic feeding device is suitable for pipes of multiple specifications and comprises an automatic feeding function and an automatic material receiving function. The automatic feeding device for numerical control cutting equipment comprises a feeding device and a material receiving device, and the feeding device comprises a groove type stock bin, a first conveying unit, a second conveying unit, a material stirring piece, a height adjusting unit, a bearing unit, a positioning length measuring unit and a control unit. The feeding device further comprises a material stirring unit used for conveying pipes on the second conveying unit to the bearing unit, and the material receiving device conveys the pipes on the bearing unit to the numerical control cutting equipment. The automatic feeding device can achieve the functions of automatic feeding, automatic material receiving, automatic adaptation to multiple types of pipes, automatic pipe supporting and the like, so that automation of the pipe feeding process is achieved.

The invention discloses a winding device for building waterproof roll manufacturing, and relates to the field of waterproof rolls. The winding device comprises a bottom plate, a winding mechanism, a compacting and discharging mechanism and a tensioning mechanism, wherein the winding mechanism comprises a first supporting plate and a second supporting plate, and the upper part of the left side of the second supporting plate is connected with a second rotating disc through a rotating seat, star-shaped protruding blocks are fixed to the sides, close to each other, of a first rotating disc and the second rotating disc, a winding roller is arranged between the first rotating disc and the second rotating disc, star-shaped grooves are formed in the two ends of the winding roller, the compacting and discharging mechanism comprises air cylinders, telescopic ends of the two air cylinders are jointly connected with a connecting plate, and a first bracket is arranged on the upper side of the connecting plate. The winding roller is very simple and convenient to mount and dismount, and the winding roller does not need to be manually supported by a worker in the mounting or dismounting process, so that the safety is high, the workload of a user is reduced, and the working efficiency is improved.

The invention relates to the technical field of medical treatment, and discloses a magnetic repulsion and attraction reciprocating medical mute saw. The magnetic repulsion and attraction reciprocatingmedical mute saw comprises an equipment body, a supporting frame is arranged in the equipment body, a driving power source is arranged in the equipment body, a driving gear is movably connected to the outer side of the driving power source, and magnetic attraction clamping teeth are meshed with the outer side of the driving gear; a rotating magnet is fixedly installed on the outer side of the magnetic attraction clamping tooth, a monopole magnet is movably installed in the equipment body and located on the outer side of the rotating magnet, a connecting rod is fixedly connected to the outer side of the monopole magnet, a connecting spring is movably connected to the end, away from the monopole magnet, of the connecting rod, and a bearing block is movably connected to the outer side of theconnecting spring. According to the magnetic repulsion and attraction reciprocating medical mute saw disclosed by the invention, impact force generated when the cutting saw cuts can be buffered by arranging a buffer spring, the damage to the cutting saw due to large rigid impact during cutting is avoided, and the service life is prolonged.

The invention discloses a damping hinge, a folding mechanism and electronic equipment. The damping hinge comprises an outer shaft which is hollow; an inner shaft provided with an inner cavity, wherein the inner shaft is rotatably arranged in the outer shaft, an outer cavity is formed between the inner shaft and the outer shaft, liquid is arranged in the outer cavity and the inner cavity, and a through hole suitable for communicating the outer cavity with the inner cavity is formed in the inner shaft; and a piston movably arranged in the inner cavity, wherein the piston is used for blocking or opening the through hole so as to adjust the damping of relative rotation of the outer shaft and the inner shaft.

The invention relates to the technical field of cloth winding devices, in particular to a cloth winding device with an elasticizing mechanism. The cloth winding device comprises a base, wherein the surface of the base is provided with a partition plate, the upper portion of the partition plate is provided with a fixed frame body, the upper portion of the partition plate is provided with a movableframe body, and the fixed frame body and the movable frame body are connected through a splicing assembly; and a mounting frame is arranged on the surface of the movable frame body, a driving motor isarranged in the mounting frame, a driving disc is arranged at the end part of the shaft body of the driving motor, a transmission belt is arranged on the outer side of the driving disc in a sleevingmanner, the transmission belt is arranged on the outer side of a rotating frame in a sleeving manner at the same time, and the rotating frame is inserted into the surface of the movable frame body. The cloth winding device with the elasticizing mechanism has the beneficial effects that the an elasticizing device and the winding structure are fused together to form two processes which can be carried out at the same time; and the whole equipment is small in size, simple in structure and suitable for popularization and use.

The invention relates to the technical field of cloth rewinding devices, in particular to a cloth rewinding device with an elastic mechanism, comprising a base, a partition is arranged on the surface of the base, a fixed frame is provided on the upper part of the partition, and the partition The upper part is provided with a movable frame body, and the fixed frame body and the movable frame body are connected by splicing components. The surface of the movable frame body is provided with a mounting frame, and the inside of the mounting frame is provided with a driving motor. The end of the shaft body of the driving motor is provided with a drive The outer side of the driving disc is covered with a transmission belt, and the transmission belt is sleeved on the outer side of the turret at the same time, and the turret is inserted on the surface of the moving frame body; the beneficial effect is: the cloth winding device with an elastic mechanism proposed by the present invention Combining the texturing equipment and the winding structure together constitutes equipment that can carry out two processes at the same time. The whole equipment is small in size and simple in structure and is suitable for popularization and use.

The invention discloses a full-automatic re-tightening device for a fuel tank strap of a heavy vehicle, and mainly relates to the technical field of automobile safety. The device comprises pressure sensors which are mounted between a strap and an oil tank, a re-tightening motor mounted on one side of a fastening bolt, and a control system, wherein a gear is mounted on an output shaft of the re-tightening motor, and teeth meshed with the gear are arranged on the fastening bolt; and the pressure sensor and the re-tightening motor are in signal connection with the control system. The tightness condition of the fuel tank strap can be monitored in real time, so that the tightness is fully automatically adjusted, silt is prevented from entering a gap between the strap and the fuel tank, and the firmness, the safety and the service life of the fuel tank are guaranteed.

The invention discloses an electric chain saw chain tightness adjusting device. The electric chain saw chain tightness adjusting device comprises a machine frame, a chain wheel, a chain board and a chain. The chain wheel is connected on the machine frame in a rotating mode. The chain board is arranged on the machine frame. The chain is arranged on the chain board and driven by the chain wheel. An adjusting device is arranged on the chain board, and the adjusting device is used for adjusting the relative distance between the chain board and the chain wheel so that the chain can be loosened or tensioned. The adjusting device comprises a gear driving device and a position-limit device, wherein the gear driving device drives the chain board to move, and the position-limit device drives the chain board to move back and forth relative to the machine frame. By means of the electric chain saw chain tightness adjusting device, tightness of the chain can be conveniently adjusted, operability can be enhanced, and security risks can be effectively avoided.

The invention relates to photovoltaic cleaning equipment, and discloses a pre-tightening device. The pre-tightening device comprises a guide rail, an adjusting base, a mounting base, a pulley, a rebounding part, a ruler and a pointer, wherein the adjusting base is slidably arranged on the guide rail, and is used for being locked and fixed with the adjusting base when sliding to a preset position;the mounting base is slidably arranged on the adjusting base, the pulley is rotatably arranged on the mounting base, and is used for being bypassed by a traction rope connected with a cleaning device,the rebounding part is arranged on the adjusting base, the ruler is arranged on the adjusting base in a sliding direction parallel to the mounting base, and comprises a tensioning upper limit and antensioning lower limit, the tensioning upper limit faces a head end of the rebounding part, and the tensioning lower limit is opposite to the tensioning upper limit; and the pointer is arranged on themounting base and is used for pointing to the ruler and marking the position of a sliding wheel. Compared with the prior art, the tightness change of the traction rope can be directly observed, so that the tightness of the traction rope can be adjusted accurately, and the cleaning device can better clean a photovoltaic panel.