45results about How to "Add rotation function" patented technology

The invention discloses an adobe stacking machine and an adobe stacking method. The adobe stacking machine comprises a small mechanical arm, a conveying line, a large mechanical arm with a movable portal frame as a frame and a control system. The portal frame serves as the frame of the large mechanical arm. The large mechanical arm comprises a lifting mechanism, an X axial movement mechanism, a rotating mechanism and a clamping mechanism. The lifting mechanism is located in the portal frame to slide vertically, and therefore the height of the whole equipment is controllable. The X axial movement mechanism slides left and right in the portal frame, and the requirement for stacking adobes clamped by the clamping mechanism to the two sides of a brick vehicle after the adobes are rotated is met to the maximum degree. The rotating mechanism and the clamping mechanism are arranged so that a rotating function can be increased for the large mechanical arm, the stacking direction of the adobes is changed by changing the rotating angle of the clamping mechanism, and therefore the adobes are sacked in a criss-cross manner, and the brick collapsing accident is avoided on the basis of not reducing the yield of a single brick vehicle.

The invention discloses a heat treating equipment for a rocker arm shaft of an automobile engine, which comprises a high-frequency heating induction coil (2) for performing high-frequency heating on a to-be-processed workpiece (1), wherein the upside and the downside of the high-frequency heating induction coil (2) are correspondingly provided with a positioning mechanism which clamps and limits the upper part and the lower part of the to-be-processed workpiece (1) in the center of the high-frequency heating induction coil (2); and the positioning mechanism comprises an upper positioning shaft (10) and a lower positioning shaft (20) which are arranged right above and under the high-frequency heating induction coil (2) and are used for clamping the to-be-processed workpiece (1). The upper positioning shaft (10) is provided with an upper rotating electrical machine (11) and a cylinder (12) capable of making the upper positioning shaft (10) move up and down; and the lower positioning shaft (20) is provided with a lower rotating electrical machine (21) and a swing mechanism capable of making the lower positioning shaft (20) swing up and down. The heat treating equipment meets special heat treating requirements of a part, and has the advantages of stable product quality, high automation degree and high production efficiency.

The invention relates to a rehabilitation bed. The rehabilitation bed comprises a lower bed body, an upper bed body, a lifting mechanism, a rotating mechanism, a bracket, a mattress and a plurality oftelescopic push rods. The rehabilitation bed has a function of assisting in a user to get out of the bed, the mattress rotates through the rotating mechanism, and meanwhile, the bending state of themattress is adjusted through the telescopic push rods, so that the mattress is temporarily changed into a seat; and the rehabilitation bed further comprises a central processing unit, a storage moduleand a wireless transmitting and receiving module, the central processing unit is electrically connected with the lifting mechanism, the rotating mechanism and the telescopic push rods, and the storage module records adjustment parameters. The rehabilitation bed greatly brings convenience for the elderly, patients or the disabled with mobility difficulties to get out of the bed, meanwhile, a process of getting out of the bed is optimized, the rehabilitation bed brings convenience for a user to stretch feet to put on shoes, and an automatic control effect is achieved. The rehabilitation bed isused in the fields of elderly care instruments and rehabilitation instruments.

The invention discloses an auxiliary multi-direction adjusting device for industrial video detection. The auxiliary multi-direction adjusting device comprises a supporting plate and a bottom plate, wherein a first motor is mounted on one side of the bottom surface of the supporting plate, and the first motor is in transmission connection with the bottom of the bottom plate through a transmission mechanism; supporting assemblies are arranged on the bottom surface of the supporting plate, a second motor is transversely mounted on one side of the top surface of the supporting plate, and the second motor is movably connected with a lifting plate through a lifting mechanism; a fixing block is arranged at the top end of the lifting plate, and a third motor is movably connected with a bearing through a detection mechanism, a rectangular object carrying bottom plate is arranged on a ground on one side of the bottom plate, an object carrying plate which is arranged in parallel is positioned right below other end of a transverse plate and is arranged above object carrying bottom plate, and a detection workpiece is placed in the middle of the top surface of the object carrying plate. The invention further discloses an adjusting method of the auxiliary multi-direction adjusting device for the industrial video detection, the auxiliary multi-direction adjusting device is simple and easy to operate and high in automation degree, the device not only improves the practicability and stability of the device, but also improves the efficiency of the device for product detection.

The invention relates to a three-winding-drum hydraulic cable winch which comprises a base, a rotary pedestal mounted on the base, a hydraulic motor, a manual rotary device and winding drums. The two sides of the rotary base are separately provided with a left bracket and a right bracket. The winding drums are mounted between the left bracket and the right bracket through a spindle and mounted on the spindle. The hydraulic motor is mounted on the outer side of the left bracket and connected with the spindle. The manual rotary device is mounted on the outer side of the right bracket and connected with the rotary pedestal to drive the winding drums to rotate around the base. The rotary pedestal is provided with a three-way hydraulic rotary central connector. A hydraulic pipeline is connected with an oil port of the three-way hydraulic rotary central connector through the base, and the other oil port of the three-way hydraulic rotary central connector is connected with the hydraulic motor through a hydraulic pipeline. The hydraulic motor drives the winding drums to rotate so as to wind and unwind cables. The three-winding-drum hydraulic cable can save the ship space, adapt to simultaneous connection of different cables and be freely rotated to change the angle.

The invention provides a multifunctional plug capable of freely rotating. The multifunctional plug comprises a shell upper portion and a shell lower portion which is connected with the shell upper portion through a center shaft in a rotation mode. A jack is formed in the shell upper portion and a cable is connected with a metal sheet in the jack. A plug body is arranged below the shell lower portion and the center shaft is composed of an outer metal layer, a middle rubber layer and an inner metal layer, wherein the outer metal layer, the middle rubber layer and the inner metal layer are sequentially arranged from outside to inside. The outer metal layer and the inner metal layer are connected and the outer metal layer is connected with the metal sheet in the jack through a wire. The inner metal layer is connected with the plug body through a wire. As the series connection and rotation functions are added to the multifunctional plug, the jack is formed in the top of the plug so that the second plug body can be inserted in series and the space utilization rate is improved. The top of the plug is electrically connected with the bottom of the plug in a free rotation mode so that the plug can be easily inserted. The multifunctional plug has the advantages of being simple in structure, convenient to machine, low in cost and good in portability and convenience.

The invention discloses a projectile emission device. The device comprises a device shell, a first transmission cavity is formed in the device shell, a rack sliding groove is formed in the inner bottom wall of the first transmission cavity, a rack is arranged in the rack sliding groove in a sliding fit manner, a gear is arranged in the first transmission cavity in a rotary fit manner, the gear isengaged with the rack, a first convex block is fixedly arranged on the front side end face of the gear, a connecting rod is arranged in the first transmission cavity in a rotary fit manner, a first sliding groove is arranged in the connecting rod in a penetrating manner, the first sliding groove is in sliding fit connection with the first convex block, a second sliding groove is formed in the connecting rod in a penetrating manner, a third sliding groove is formed in the inner bottom wall of the first transmission cavity, a sliding block is arranged in the third sliding groove in a sliding fitmanner, a first pressing plate is fixedly arranged on the upper end face of the sliding block, symmetric first return springs are fixedly arranged between the lower end face of the first pressing plate and the inner bottom wall of the first transmission cavity, and a second transmission cavity is formed in the inner top wall of the first transmission cavity.

The invention relates to a steel structure wind-resistant tower-type parachuting training device which comprises a main tower and at least one tower arm connected with the side edge of the main tower,and the main tower and the tower arm are both of a frame-shaped steel structure. The tower arms are evenly distributed on the periphery of the main tower. The tower crane further comprises a tractionmechanism arranged on the tower arm, and the traction mechanism is arranged at the front end of the tower arm. The traction mechanism comprises a traction rope, and the traction rope is directly andvertically led out downwards. Both the main tower and the tower arm adopt steel structures, and have the characteristics of high strength and good wind resistance. The tower arm and the main tower areconnected through the hinge, and the tower arm can be put down to the ground in severe weather, so that destructive influence of the severe weather on the structures of the main tower and the tower arm is reduced. The traction mechanism is directly arranged at the front end of the tower arm, structures such as pulleys are omitted, and safety and no accident are achieved. And the weather adaptability of the parachuting tower and the parachuting safety are improved by arranging the rotating part. And the arranged blower can avoid collision accidents. And an emergency rescue channel can be established by the arranged emergency rescue rope bag when a fault occurs.

The invention discloses an open type detection device and method for the surface shape and the parallel difference of a large-size optical window part. The detection device comprises an upper platform, a lower platform, a support, a lifting screw, a guide rail, a sliding block, a locking block, a limiting block, a pitching and rotating adjusting mechanism and an objective table, wherein the upperplatform and the lower platform are leveled through the lifting screw to form an open type test area of the large-size window part. According to the device, an interferometer is installed on the upperplatform, a pitching adjusting mechanism is utilized for enabling a surface image of a part and a standard image of the interferometer to generate interference, interference fringes of the area are obtained, an interference pattern of the area is obtained, local surface shape testing of the large-size window part in the full range is achieved by rotating and horizontally moving the part. Interference patterns are obtained through the interference fringes generated on two faces of the part, the parallel difference of the area is obtained according to an equal-thickness interference parallel difference calculation formula, and local parallel difference testing of the large-size window part in the full range is achieved by rotating and horizontally moving the part.

The invention discloses a horizontal-axis milling and digging head with a rotation function. The horizontal-axis milling and digging head with the rotation function comprises a horizontal-axis millingand digging head body, a first transition frame, a rotating driving device, a central rotating joint, a second transition frame and a pin shaft. One side of the horizontal-axis milling and digging head body is connected with the first transition frame by bolts, the first transition frame is connected to one side of the rotating driving device by screws, the other side of the rotating driving device is connected to the second transition frame by screws, and the pin shaft is arranged at the other end of the second transition frame, and the central rotating joint are separately connected to thefirst transition frame and the second transition frame through the rotating driving device. According to the horizontal-axis milling and digging head with the rotation function, the rotation functionis additionally arranged on a horizontal-axis milling and digging head of an existing roadway repairing machine, so that the roadway repairing machine truly becomes multifunctional, the roadway repairefficiency is greatly improved, and an effective way is provided for efficient and safe production in coal mine.

The invention relates to a three-winding-drum hydraulic cable winch which comprises a base, a rotary pedestal mounted on the base, a hydraulic motor, a manual rotary device and winding drums. The two sides of the rotary base are separately provided with a left bracket and a right bracket. The winding drums are mounted between the left bracket and the right bracket through a spindle and mounted on the spindle. The hydraulic motor is mounted on the outer side of the left bracket and connected with the spindle. The manual rotary device is mounted on the outer side of the right bracket and connected with the rotary pedestal to drive the winding drums to rotate around the base. The rotary pedestal is provided with a three-way hydraulic rotary central connector. A hydraulic pipeline is connected with an oil port of the three-way hydraulic rotary central connector through the base, and the other oil port of the three-way hydraulic rotary central connector is connected with the hydraulic motor through a hydraulic pipeline. The hydraulic motor drives the winding drums to rotate so as to wind and unwind cables. The three-winding-drum hydraulic cable can save the ship space, adapt to simultaneous connection of different cables and be freely rotated to change the angle.

The invention provides a working rotary table of a sponge horizontal cutting machine. The working rotary table comprises a guide rail, a bracket, a box body, connection pieces, chain wheels, worm rods, a turbine, a rotating shaft, a fixed rack, a rotary table body, rollers, a working table and a motor, wherein the box body is fixedly connected to the upper end of the bracket; two sides of the upper end of the box body are fixedly connected with the connection pieces correspondingly; two sides of each worm rod are arranged in bearing holes in the connection pieces correspondingly; the turbine is fixedly connected to the rotating shaft; the motor is fixedly connected to the lower end of the box body through a bolt; a plurality of rollers are correspondingly arranged on two sides of the lower end of the working table; and the fixed rack is arranged on the lower side of the box body. The working rotary table is simple in structure and reasonable in design; on the basis of translational motion, a rotating function is added; by the adoption of turbine and worm rod transmission, the working rotary table is steady and reliable in transmission, has self-locking property, and can be applied to cutting of sponge with a more complicated structure; and the working efficiency of sponge cutting is improved.

The invention discloses monitoring equipment convenient to adjust a monitoring angle, which comprises a mounting plate, a mounting hole, a fixing bolt, a fixing seat, a connecting column, an angle adjusting mechanism, a rotating mechanism, a camera and a controller, and is characterized in that through the arrangement of the angle adjusting mechanism, when the left-right angle of the camera is adjusted, the controller issues an instruction to a first encoder, and the first encoder is used for adjusting the left-right angle of the camera; the first driving motor drives the gear to rotate and drives the driving rod to swing under the meshing transmission of the gear and the fluted disc, so that the left and right monitoring angles of the camera are adjusted; through the arrangement of the rotating mechanism, when the driving rod moves to the end of the through groove and cannot move any more, the second driving motor drives the camera to rotate through the rotating table, the rotating function is added on the basis of adjustment of the original angle adjusting mechanism, and the effective range of the shooting visual angle of the camera is effectively enlarged.

The invention relates to a crystal growth device with a melt stirring function, crystal growth device comprises an induction coil (1), an insulation layer (2), an induction heating body (3), a raw material (4), a crucible (5) and a crucible pillar (6). The crucible (5) is provided with a stirrer (7) for stirring a raw material (4). Compared with the prior art, a crucible rotation function is addedon the conventional basis that the crucible and a melt are relatively static, the relative movement of the crucible and the melt is increased, bubbles in the melt can be more easily excluded, dopingelements in the raw material are more uniform in distribution, and the growth of high quality crystals is facilitated.

The invention discloses energy-consumption-free low-resistance wind energy hydraulic oxygen enrichment equipment which comprises a driving assembly and a lifting assembly; the driving assembly is fixedly connected with the lifting assembly through a rotating shaft and a supporting base; the driving assembly is located above the water surface through a floating body, and the lifting assembly is located below the water surface; the driving assembly is used for driving the lifting assembly under the action of wind power; and the lifting assembly is used for disturbing the upper-layer water body and the lower-layer water body. The structure is scientific and reasonable, use is safe and convenient, the wind power is used for enabling the driving assembly to rotate, and therefore the function that the driving assembly drives the lifting assembly to rotate is achieved; the lifting assembly rotates to lift the lower-layer water body to the water surface so as to disturb the upper layer and the lower layer of the water body, so that the dissolved oxygen of the surface water body is increased, the oxygen enrichment effect of the water body is improved, a good algae growth environment is obtained, and the content of toxic substances is reduced.

The invention relates to a worktable, provides a worktable which needs to quickly and automatically swing or rotate and is mainly used in the fields of gluing, welding, electronic plug-ins and processing manufacture or used for completing a certain procedure, and particularly relates to a swinging worktable. The swinging worktable comprises a rack, supports, a reducer and a motor, and is characterized by further comprising a gear A, a gear B, a swinging table, connecting plates, a sensor A, a sensor B and clamping mechanisms, wherein the supports comprise a left support and a right support; the reducer is mounted on the rack and connected with the motor; the gear B is connected with the reducer; the gear A is fixedly connected with the connecting plates; the two connecting plates are mounted on the supports through rotating shafts in a sleeving manner; and the swinging table is fixedly connected with the connecting plates. The swinging worktable can effectively avoid workpiece interference, enables gluing, welding and the like of parts which cannot be glued, welded and the like to be realized, and meanwhile, can be linked with gluing, welding and other equipment, so that the equipment flexibility is improved, and the equipment application range is widened; and the swinging worktable can replace outdated simple worktables to be widely applied to the fields of gluing, welding, electronic plug-ins and processing manufacture or widely used for completing a certain procedure.

The invention discloses a supporting device for a POS machine and belongs to the technical field of financial transactions. With the supporting device for POS machine adopted, the problem of insufficient transaction efficiency can be solved. The supporting device for the POS machine comprises a supporting seat, an adjusting bracket, a rotating disc, a main column, a base and a display screen; therotating disc comprises an outer disc and an inner disc; the outer disc and the inner disc are fixed through bearings; the supporting seat is connected with the inner disc through the adjusting bracket; the outer disc is fixed at the top end of the main column; the main column is arranged on the base; the display screen is arranged on the main column; a controller is arranged inside the display screen with a touch control function; the controller is connected with the POS machine one or more connection modes selected from a Bluetooth connection mode, an infrared connection mode and a radio connection mode; operation on the POS machine can be completed through the display screen, and the POS machine does not need to be transmitted back and forth; and therefore, transaction efficiency is improved, and the vigilance of a customer can be reduced.

The invention provides an improved anti-theft butterfly valve, and belongs to the technical field of butterfly valves. The improved anti-theft butterfly valve comprises a bottom plate, a first fixing block and a rotating mechanism; the first fixing block is fixedly connected to the upper end of the bottom plate, a rhombic rod is fixedly connected to the upper end of the first fixing block, and a second fixing block is fixedly connected to the upper end of the rhombic rod ; the rotating mechanism comprises a second gear, a third gear, a second rotating bearing, a fourth gear, a first I-shaped wheel, a fourth rotating bearing, a second I-shaped wheel, a connecting belt, an eighth rotating bearing and a driving part, the second gear is fixedly connected to the upper end of the bottom plate through a rotating shaft, and the third gear is fixedly connected to the lower end of the third gear; and the second rotating bearing is fixedly connected to the lower end of the rotating shaft, and the fourth gear is rotationally connected to the circumferential surface of the third gear in an engaged manner. The rotating function of equipment is further improved through the arranged rotating mechanism, and therefore the automatic opening and closing functions of the equipment are further improved.

The invention discloses a brazier type stone simmer electric barbeque oven which comprises an oven, an oven core and a kebab baking mechanism. The oven core is fixed into the oven; the oven core comprises a core body, a simmer plate, an electric heating plate and a baking tray; the core body comprises a connecting portion and a hollowed-out carrying portion, the simmer plate is fixed into the connecting portion of the core body, the electric heating plate is fixed onto the simmer plate and clings to the inner wall of the core body, and electric wire of the electric heating plate extend out ofthe oven via wire tubes to be connected with power sources; the baking tray is mounted on the hollowed-out carrying portion of the core body; the projection area of the baking tray on a vertical planeis larger than the connecting portion owing to the hollowed-out carrying portion; the kebab baking mechanism comprises limit grooves, the limit grooves are formed in the oven, and baking needles areembedded in the limit grooves and are enclosed below the hollowed-out carrying portion of the core body. The brazier type stone simmer electric barbeque oven has the advantages that the brazier type stone simmer electric barbeque oven is simple in structure and applicable to home use and commercial use; the brazier type stone simmer electric barbeque oven can simultaneously have a barbeque function and a kebab baking functions of the baking tray, and the heating plate, carbon and stone can be used as joint heat sources for roasting foods.

The invention relates to a cargo position adjustment device for a transport vehicle. The device comprises a guiding mechanism, a drive rod, two clutches, two driving wheels and two rotary tables arranged in an up and down mode; the clutches are connected with the driving wheels respectively and matched with the drive rod; the rotary tables each comprises a rotary table inner ring and a rotary table outer ring, and the rotary table inner rings are connected with the driving wheels respectively; the guiding mechanism is connected with the rotary table outer rings; the rotary table inner ring of one rotary table is provided with at least one oblique surface set or curved surface set, each oblique surface set or curved surface set comprises at least two oblique surfaces or curved surfaces, and the rotary table outer ring of the other rotary table is provided with a support assembly. According to the cargo position adjustment device for the transport vehicle, a lifting function and a rotating function are achieved simultaneously, the structure is simple, the manufacturing cost is low, adjustment and operation on relative parts can be conducted according to needs of operators or needs of cargoes, and the cargo position adjustment device is suitable for popularization.

The invention relates to the technical field of lifting tables, in particular to an electric lifting table with positioning and locking functions. In an existing lifting table, a table top can only ascend and descend with the front face facing upwards, in the ascending process, a lead screw is prone to deviating, torsional moment is generated, and the service life of the lead screw is shortened. An electric lifting table with positioning and locking functions is characterized in that machine frames with lifting parts, a table top above the two machine frames and a connecting rod between the two machine frames are arranged on ground feet, and the table top is rotationally connected to the two machine frames; clamping pieces are arranged on the two racks, so that clamping in multiple directions can be carried out; the lifting component comprises a screw rod, and a self-locking piece is arranged at the upper joint of the screw rod; and the screw rod is connected with a positioning block in the rack. And the table top can rotate, can be folded when not used, and does not occupy land. The lead screw is provided with the positioning block, guiding is effectively carried out during ascending and descending, and the service life is prolonged. And the self-locking piece is connected above the screw rod, so that the falling phenomenon of the table during normal use is effectively prevented, and the stability of the table is ensured.

The invention discloses a storage bin device of a rotatable slurry spraying machine. The slurry spraying machine and an electric appliance cabinet are arranged on a vehicle body. A storage bin base is transversely fixed at the lower end of the storage bin of the slurry spraying machine. A vibrating motor is fixed at one side of the storage bin base, a rotating shaft fixed at the lower end of the storage bin base is arranged in a guide shaft sleeve of the rotating shaft in a matching way, a jack is arranged below the shaft sleeve, and a mandril of the jack is inserted into the shaft sleeve from the lower end of the guide shaft sleeve of the rotating shaft and is in contact with the rotating shaft in the storage bin. The rotating function of the self-vibrating storage bin is added, and the storage bin does not need to be lifted down during the maintenance of the slurry spraying machine. When a disc needs cleaning, a clamping mechanism is loosened, the storage bin is lifted up by the jack to rotate, and the storage bin is slightly pushed to rotate around the rotating shaft to any angle. The storage bin has the advantages of large capacity, adjustable exciting force, high vibrating frequency, good safety performance, long service life and good vibrating and blanking effect and is convenient to install.

The invention discloses an automatic RFID Wafer returning device. The device comprises a shell, a quick connector, a first mounting plate, a second mounting plate, an in-place sensor, a push rod, a lower cavity, an upper cavity, a guide shaft, an in-place block, a sealing ring, a guide pin, a guide pin supporting block and an in-place pin, wherein the quick connector is installed at the bottom of the shell, the sealing ring is installed in a groove in the bottom of the guide shaft, the guide shaft is installed in the shell, the first mounting plate and the second mounting plate are mounted on the two sides of the shell, the guide pin supporting block is mounted on the top of the shell, and the guide shaft is mounted in the shell and the guide pin supporting block. According to the automatic RFID Wafer returning device, the problems are effectively solved, operation is convenient, the device can be compatible with Wafer material trays of different sizes, in this way, the use cost and the maintenance cost of a user side are effectively saved, convenience is provided for upgrading of future products, and better use prospects are brought.

The invention provides a revolution and autoroatation integrated steel wire rope decontamination device. The revolution and autoroatation integrated steel wire rope decontamination device mainly and structurally comprises a belt wheel, a brush seat, a support, a base, an inner gear, a gear shaft, a connecting plate, a flexible shaft and a steel wire brush set. The base is fixed to the support, and the position between the brush seat and the base is supported through two deep groove ball bearings; the belt wheel is fixed to the brush seat through a screw, and the inner gear is fixed to the base through a screw; the position between the gear shaft and the brush seat is supported through two deep groove ball bearings, and the connecting plate is fixed to the brush seat through a screw; and the steel wire brush set is mounted on the connecting plate through a pin, and the gear shaft and the steel wire brush set are transmitted through the flexible shaft. According to the device, the autorotation function of a steel wire rope brush is additionally arranged, and compared with an existing steel wire rope brush which only surrounds a steel wire rope to rotate, the revolution and autoroatation integrated steel wire rope decontamination device has the beneficial effects that the mechanization degree is higher, the decontamination effect is better, and the working efficiency is improved.

The invention discloses electroplating pull head drying equipment. The electroplating pull head drying equipment comprises a shell, guide rails and rotating hooks. The shell is provided with containing space, and hot air holes are formed in the inner side wall of the shell. The guide rails are arranged in the shell. The rotating hooks are used for hanging hanging tools, and to-be-dried pull headsare arranged on the hanging tools in a hung manner. The rotating hooks are arranged on the guide rails in a hung manner and move in the shell along the guide rails, and the hanging tools arranged on the rotating hooks in a hung manner and the to-be-dried pull heads are dried by hot air blown out of the hot air holes. The electroplating pull head drying equipment has the advantages that the electroplating pull head drying equipment can achieve omni-directional automatic hot air drying on the pull heads hung on the hanging tools through mutual cooperation of the hot air and the guide rails; thestructure is simple; stability is good; the pull heads can be fully dried; and according to the advantage of open type drying, water vapor volatilization is thorough, and water marks are not prone tobeing left on the surfaces of the pull heads.

The invention discloses an adaptive media access control method using a superframe in a clustered WSN, which mainly solves the problems of high power consumption and poor flexibility in large-scale scenarios in the prior art. The scheme is: design a superframe structure based on cluster capacity self-adaptation for the cluster topology; optimize multiple multimedia access control MAC frames; set the mechanism for sending and receiving MAC frames in the superframe structure; Based on cluster capacity adaptation, each cluster head periodically sends a beacon frame to mark the start time of the non-competition period, competition period and sleep period of the cluster; all nodes in the cluster wake up when the beacon frame arrives, and in the non-competition period Sleep after sending the data of this node; the cluster head node sleeps after the competition period ends; the data frame is sent in the non-competition period; cluster entry request frame, cluster entry reply frame, cluster head rotation request frame, cluster head rotation confirmation frame and response frame Sent during the contention period. The invention has low power consumption and strong adaptability, and can be used in large-scale IoT scenarios.

The invention belongs to the technical field of medical instruments, and particularly discloses an occipital-cervical fixation fusion system. The system comprises a dentata pedicle screw, an occipitalbone plate, a cervical posterior transverse connector and connecting rods, wherein the occipital bone plate comprises a central line plate, a left wing plate and a right wing plate which are connected into a whole; the left wing plate and the right wing plate are symmetrically arranged on two sides of the central line plate; a sliding chute and a side wing fixing hole are formed in the left wingplate and the right wing plate; an occipital bone fixing hole is formed in the central line plate; and when the occipital-cervical fixation fusion system is used, the dentata pedicle screw is placed in a bone tissue of a dentata of a patient, the occipital bone plate is fixed on an occipital bone of the patient, the dentata pedicle screw is connected with the occipital bone plate through the connecting rods, and the connecting rods on two sides are connected through the cervical posterior transverse connector. The occipital bone plate adapts to the anatomical characteristics of the occipital bone, fixation of a central line and a side wing is considered, stress is dispersed, and looseness is prevented; and the sliding chute function is provided, so that the relative positions of the connecting rods on two sides can be adjusted to be parallel, stress conduction is facilitated, the mounting operation of the connecting rods is simplified, and the transverse connector is added favorably. The dentata is placed in the directional pedicle screw, so that reduction and reduction of swing of a screw tail after an operation are facilitated.