45results about How to "There will be no loosening" patented technology

The invention discloses a casting cleaning unit which comprises a casting transit exchange mechanism. The casting transit exchange mechanism comprises a bottom support, an exchange platform, an upper support, a drive device and a positioning device. The positioning device comprises an installation plate and at least two ejecting rods. The installation plate is connected to the power output end of the drive device. The upper ends of the ejecting rods are connected to the installation plate. The lower ends of the ejecting rods are right opposite to the exchange platform. A robot system comprises a first robot and a second robot. The first robot is arranged on the feed side of the casting transit exchange mechanism. The second robot is arranged on the discharge side of the casting transit exchange mechanism. The casting cleaning unit is suitable for automatic unit product price multi-procedure conditions, reliable and stable in positioning, suitable for positioning castings of various types, and suitable for being shared by various product parts; the mechanism is simple in structure, low in manufacturing cost and high in cost performance. The invention further discloses a casting cleaning method.

A telescopic tube with the improved locking mechanism for cleaner is composed of mutually sleeved internal and external tubes. Said internal tube has the axial slide slot with symmetrica U-shaped notches at intervals. Said external tube has one end fixed to a join sleeve which has a locking unit consisting of a V-shaped elastic locking sheet arranged in said slide slot of internal tube and a pin block inserted in said V-shaped opening and pressed by a spring.

The invention discloses a single-main-beam multi-point driving solar tracking system. The system comprises a main beam and at least one rotary speed reducer, wherein one of the at least one rotary speed reducer is connected with a motor; the rotary speed reducer connected with the motor is a driving rotary speed reducer, the other rotary speed reducers are driven rotary speed reducers, and the torque of the driving rotary speed reducer is transmitted to the driven rotary speed reducers through a transmission shaft; and the rotary speed reducers, the transmission shaft and the main beam are arranged to rotate synchronously in the same direction. The transmission shaft and the main beam synchronously act in the same direction, and then the main beam can be used for supporting the transmission shaft, so the transmission shaft is not prone to torsion or breakage, the service life of the transmission shaft is long, and with the structure, the diameter of the transmission shaft does not need to be too large and equipment investment cost is low; and due to the fact that the transmission shaft, the motor and the main beam rotate synchronously, in the turning process of the main beam, a photovoltaic panel cannot collide with the transmission shaft, the adjustable angle of the main beam is larger, flexibility is higher, and the service life of the equipment is prolonged.

The invention provides a fixing device for sampling a cattle neck, which comprises a fixing frame. The fixing device for sampling a cattle neck is characterized in that a U-shaped frame with large upper part and small lower part is arranged on the fixing frame, a left swing longitudinal rod and a right swing longitudinal rod are arranged in the U-shaped frame, the tops of the left swing longitudinal rod and the right swing longitudinal rod are connected through a linkage mechanism, and one of the swing longitudinal rods is connected with an opening and closing mechanism. After the cattle headis conveniently extended out from between the left swing longitudinal rod and the right swing longitudinal rod, the left swing longitudinal rod and the right swing longitudinal rod are synchronously closed under the action of the linkage mechanism by operating the opening and closing mechanism to clamp and fix the cattle neck, blood sampling, injection and other operations can be carried out, theleft swing longitudinal rod and the right swing longitudinal rod are separated, after the cattle head is left, the sampling or injection is completed. The fixing device for sampling a cattle neck hasthe advantages of strong applicability, better fixation to the cattle neck, no loosening condition, and improved convenience of sampling operation under the condition of ensuring the safety of operators and surrounding facilities. The fixing device for sampling a cattle neck is suitable for sampling or injection of other livestock.

The invention discloses a multifunctional tea planting land weeding device and an operation method thereof. The weeding device comprises a mounting bottom plate, a cutting cover plate is arranged on the lower portion of the mounting bottom plate, three cutting blades are mounted at the bottom of the cutting cover plate, a supporting seat is mounted on the upper surface of the mounting bottom plate, a supporting frame is rotatably connected at the top of the supporting seat, a liquid medicine box is fixedly mounted on the supporting frame, and an air supply cylinder is mounted on one side of the liquid medicine box and connected with the supporting frame. The cutting range of the weeding device is wide, large-area weeds can be rapidly cleaned, working efficiency is high, the height of the cutting cover plate is conveniently adjusted, and cutting requirements of different heights of weeds are met. The weeding device is simple in structure, liquid medicine is blown by fan blades, sprayingarea can be increased, spraying distance can be increased, and weeding effects are good. According to the weeding device, weed cutting and weed removal by pesticides are integrated, functions are diverse, and weeding requirements under different conditions can be met.

The invention discloses a novel cable recovery device for ocean engineering, and relates to the field of cable recovery. The novel cable recovery device for the ocean engineering comprises a base, the top side of the base is fixedly provided with a motor, two installing plates and a sliding groove, wherein one sides of the installing plates are provided with through groove openings, and rotating shafts are rotationally installed on the sides, close to each other, of the two installing plates correspondingly, and the output end of the motor is connected to one end of one of the rotating shafts through a transmission part. According to the novel cable recovery device, the motor is started to drive a driving wheel, so that a belt can drive a driven rotating wheel to enable the rotating shafts to rotate, then a linkage shaft drives a rod and an inserting rod to enable a winding reel to automatically wind a cable, meanwhile, the driven rotating wheel rotates to drive a round rod to displace, a swing rod is driven to generate angle change during displacement, a rotating plate is pushed to displace teeth, and a linkage gear enables a threaded rod to rotate, so that a moving part moves in a reciprocating manner, and the cable is uniformly wound in the recycling process.

The invention relates to a PM permanent magnet stepping motor bracket. The PM permanent magnet stepping motor bracket comprises a base; the two ends of the base are fixedly connected with side plates;the inner side bottom ends of the side plates are fixedly connected with reinforcing ribs; the bottoms of the reinforcing ribs are fixedly connected with the top of the base; the top parts of the side plates are fixedly connected with lower limiting chucks; the outer side of an inner cavity of each lower limiting chuck is fixedly connected with an arc-shaped baffling edge I; a rubber pad I is arranged on the inner side of the arc-shaped baffling edge I; the rubber pad I is glued with the inner wall of the corresponding lower limiting chuck; the two ends of the top of the lower limiting chuckare fixedly connected with double-screw bolts; and the top parts of the lower limiting chucks are connected with corresponding upper limiting chucks. The PM permanent magnet stepping motor bracket issimple in structure, convenient to use, and capable of preventing damage to the limiting chucks or the motor caused by relatively high fastening force, buffering vibration generated in motor operation, enabling motor fixation to be firmer and more reliable, without generating a phenomenon of loosening of a fastening mode, and enabling the motor to perform a stable operation.

The invention provides a self-locking chuck and an electrode slice connecting device, and the self-locking chuck does not get loose, and is safe in treatment, good in electrical conductivity, low in cost and good in universality. The self-locking chuck comprises an upper cover, a lower cover and a turning plate; the upper cover and the lower cover are buckled and connected, a clamping channel is formed between the upper cover and the lower cover, a connecting shaft is fixedly arranged at the front end of the upper cover, a half open shaft sleeve is arranged in the eccentric position of the turning plate, a front protruding part and a rear protruding part are arranged at the lower part of the turning plate, the shaft sleeve is correspondingly arranged at the upper end of the rear protrudingpart, the connecting shaft is sleeved with the turning plate through the shaft sleeve, a metal elastic sheet is arranged in the clamping channel, the lower end face of the metal elastic sheet is abutted against the lower cover, the upper end face of the metal elastic sheet is abutted against the rear protruding part and the upper cover respectively, and a wire extending outwards is arranged on the rear part of the metal elastic sheet. The electrode slice connecting device comprises an electrode slice and the self-locking chuck; the electrode slice comprises an electric conduction main body, atransition section and an extending end; the extending end is connected with the electric conduction main body through the transition section, and the front end of the transition section and the extending end are arranged in the clamping channel.

The invention belongs to the technical field of household appliance production and locating and particularly relates to a household appliance production line locating mechanism. The household appliance production line locating mechanism comprises an operation platform. A fixed clamping plate, a movable clamping plate and a locating plate are arranged on the operation platform. The fixed clamping plate and the movable clamping plate are in positional correspondence. The locating plate is located on the right side between the fixed clamping plate and the movable clamping plate. The movable clamping plate is connected to a telescopic rod of a first driving cylinder. Through arrangement of the fixed clamping plate and the movable clamping plate, the household appliance production line locatingmechanism can clamp a raw material to be processed, can drive the movable clamping plate to move to achieve the clamping effect through cooperation of the first driving cylinder and facilitate opening and closing, can achieve the locating and limiting effect on the raw material to be processed through the locating plate, can achieve the stop effect on the material, can push out the processed material to an assembly line through cooperation of a third driving cylinder and a push plate and is convenient to operate.

The invention discloses a telescopic back-hung headset, including left and right headset shells (1) and a headband (2) connecting the left and right headset shells (1). The headband (2) is a wavelikebent pipeline which has moderate elasticity and plasticity and is integrally in a clamping shape, and includes a steel wire inner core (21) and a plastic tube (22) that warps the steel wire inner core(21), and the steel wire inner core (21) is buckled in buckling positions (112) of headset back shells (11) and are adhered with glue; and the plastic tube (22) sleeves tail handles (111) of the headset rear shells (11) in an interference fit mode, and when force applied to the headband (2) exceeds a designed strength, the headset (2) can bend and realize telescopic deformation, thereby changinga clamping radian. According to the headset provided by the invention, the bending radian of the headset headband can e adjusted according to the size of the head of a headset user, and thus the headset can be stably and comfortably fixed at ears of the user even if in a motion process.

The invention discloses a scratching-resisting waterborne transfer coating. The coating comprises the following components in percentage by weight: 15-50% of waterborne polyurethane, 5-35% of polycarbonate polyurethane, 3-15% of silicone-modified polyurethane, 1-10% of a coalescing agent, 0.05-0.8% of polyisocyanate, 0.01-0.3% of a wetting agent, 0.01-0.1% of a defoaming agent, 15-40% of a solvent, and 5-20% of a cosolvent. Compared with the prior art, the scratching-resisting waterborne transfer coating has the advantages of being proper in surface tension which is about 38, free from any adverse influence on later printing performance, high in hardness, and high in high-temperature resistance.

The invention relates to an anti-skid profile corner brace device locked by expansion force. The device comprises two hollow corner profile bodies, screws and connecting pins, wherein reinforcing ribsor reinforcing blocks are arranged in cavities at two ends of the hollow corner profile bodies correspondingly, expansion screw holes are arranged between the reinforcing ribs or the reinforcing blocks correspondingly, apertures of the expansion screw holes are smaller than diameters of the screws so as to achieve a purpose of expansion, pin holes are further formed in the cavities of the hollowcorner profile bodies correspondingly, the connecting pins are sleeved with the pin holes in a penetrating mode so as to connect the two hollow corner profile bodies, and anti-skidding insections arefurther arranged on sections of the outer side ends of the two hollow corner profile bodies correspondingly. Expansion locking force of a corner brace is firmer, a loosening phenomenon is avoided, a glue injection process is omitted, a corner assembling process is simplified, the assembling efficiency is improved, no formaldehyde and methylbenzene pollutants are generated, and a safe, environmentally friendly and efficient effect is achieved.

The invention discloses a lithium battery case with a splicing function, including a first housing, Battery body and slider, the right side of the first outer shell is snapped and provided with a second outer shell, and an outer connecting seat is arranged at an upper middle position of the first housing body and the second housing body, and the outer top end of the outer connecting seat is internally penetrated with a traction wire, and the top ends of both sides of the traction wire are respectively connected with the mounting sleeves on the left side of the first housing body and the rightside of the second housing body. A second clip block is fixedly arranged above the inner wall of the perforation, a mounting connecting block and a connecting groove are respectively arranged inside the second connecting block and the first connecting block, and a reserved groove is reserved at the outer top ends of the first shell body and the second shell body. The lithium battery shell with splicing function can be used to complete the splicing work between a plurality of lithium batteries under the action of the shell.

The invention discloses a tracking drive system with a multi-point support drive shaft. The system comprises a main beam and at least one rotary speed reducer, one rotary speed reducer is connected with a motor and is in transmission connection through a transmission shaft, the transmission shaft is positioned in the main beam, and a universal corner joint is arranged in the rotary speed reducer. The transmission shaft is located in the main beam, the transmission shaft is prevented from being affected by severe environments, the problems of corrosion, aging and the like of the transmission shaft are solved, and the service life of the transmission shaft is prolonged; besides, the situation that the transmission shaft is stuck due to sandstorm is reduced, and the failure rate is reduced; and moreover, the transmission shaft is arranged inside, so that the appearance layout of the whole equipment is simpler and more attractive.

The invention discloses a connector which consists of a socket and a plug. The socket is provided with an internal pin of the socket; the plug is provided with an internal pin of the plug; a shrapnel is arranged on the side of the socket; a notch is arranged on the side of the plug; the shrapnel is blocked into the notch when the plug matches with the socket. The invention also discloses a plug of the connector. The plug of the connector is provided with an internal pin of the plug and a notch is arranged on the side of the plug. The invention also discloses a socket of the connector. The plug of the connector is provided with an internal pin of the plug and a shrapnel is arranged on the side of the socket. The invention also discloses a method for connecting the connector, which comprises the following process: the shrapnel in the plug or the socket is blocked into the notch in the plug or the socket when the plug of the connector is inserted into the socket of the connector. Through the application of the invention, the reliability of the connection between the plug and the socket can be increased; the service life of the apparatus can be increased; the processing technology can be simplified and the cost can be reduced effectively.

The invention discloses a subway section protective closing partition door with a movable doorsill. The subway section protective closing partition door comprises a sealing door, a left sealing strip,a right sealing strip, hinges, a lock, an electric control cabinet, telescopic columns, bayonets, accommodating grooves, stop columns, the movable doorsill, a doorsill body, a buried tank, a wiring hole, a transmission box and a door frame. The subway section protective closing partition door has the advantages that the electric control cabinet is electrically connected with the lock, the hinges,the left sealing strip, the right sealing strip and the movable doorsill, accordingly, the integral subway section protective closing partition door can be conveniently controlled in a unified manner, and the control accuracy can be improved; the left sealing strip and the right sealing strip are distributed at opposite positions, the integral subway section protective closing partition door is stable in structure after being closed, and tight clinging effects can be realized; the left sealing strip and the right sealing strip are fixedly connected with the door frame, excellent fixing and sealing effects can be realized by the two sealing strips, and the two sealing strips can be stably connected with the door frame; the telescopic columns and the stop columns are electrically connectedwith the lock by the electric control cabinet, accordingly, the integral subway section protective closing partition door is high in stability after being closed, and separating and loosening can be prevented.

The invention relates to a yaw brake and a wind driven generator using the yaw brake. The yaw brake comprises a plier body and a friction piece. The friction piece comprises a friction piece base plate. A detection tool insertion hole is formed in the outer side face of the plier body. The transverse direction is defined to be the direction perpendicular to the clamping movement direction of the friction piece. The detection tool insertion hole extends in the transverse direction. The inner end of the detection tool insertion hole faces the friction piece base plate. The friction piece base plate is provided with a detection tool blocking face which is of the transverse size and changes in the clamping movement direction of the friction piece, or is provided with a detection tool supporting part matched with the reducing end of an inserted type detection tool in the transverse direction in a supporting manner. According to the yaw brake, the abrasion loss is conveniently observed, the detection precision can be ensured, and cost is low.

The invention relates to a yaw brake and a wind driven generator using the yaw brake. The yaw brake comprises a plier body and a friction piece. The friction piece comprises a friction piece base plate. A detection tool insertion hole is formed in the outer side face of the plier body. The transverse direction is defined to be the direction perpendicular to the clamping movement direction of the friction piece. The detection tool insertion hole extends in the transverse direction. The inner end of the detection tool insertion hole faces the friction piece base plate. The friction piece base plate is provided with a detection tool blocking face which is of the transverse size and changes in the clamping movement direction of the friction piece, or is provided with a detection tool supporting part matched with the reducing end of an inserted type detection tool in the transverse direction in a supporting manner. According to the yaw brake, the abrasion loss is conveniently observed, the detection precision can be ensured, and cost is low.

The invention discloses a high radial load rotary speed reducer which comprises a main beam and at least one rotary speed reducer body. One rotary speed reducer body is connected with a motor and is in transmission connection with the motor through a transmission shaft, a first limiting part is arranged on a shell of each rotary speed reducer body, and a worm wheel is circumferentially provided with a second limiting part matched with the first limiting part. Through the arrangement of the structures of the first limiting part and the second limiting part, it is ensured that the stability of the rotary speed reducer is higher during rotation, then it is ensured that the rotary speed reducer still has high safety protection capacity under the condition that an external travel switch fails, and it is ensured that the worm wheel rotates within a certain range.

The invention discloses an easy-to-assemble modular installation structure for an industrial instrument. The easy-to-assemble modular installation structure comprises a measuring meter head, a measuring pipeline and a connecting pipeline; wherein the measuring meter head is fixed on a pipe wall of the measuring pipeline, fixed mounting heads are arranged at two ends of the measuring pipeline, andmovable mounting heads matched with the fixed mounting heads are arranged at the end parts of the connecting pipeline; two threaded holes penetrating through the outer walls of the fixed mounting heads are symmetrically formed in the fixed mounting heads in the radial direction, and threaded columns are in threaded connection with the threaded holes; the top ends of the threaded columns are fixedly connected to the bottoms of rotating discs through connecting rods, and rotating seats are fixed on the rotating discs. The bottom ends of the threaded columns are fixed to the outer walls of arc-shaped sealing plates, the outer walls of the arc-shaped sealing plates are matched with the inner walls of the measuring pipeline and the connecting pipeline in an attached mode, clamping heads are arranged at two ends of the arc-shaped sealing plates in the axial direction, and clamping grooves matched with the clamping heads are formed in the inner walsl of the measuring pipeline and the connecting pipeline. According to the invention, the positioning and mounting work of the industrial instrument can be conveniently and quickly completed.

The invention discloses a photovoltaic tracking system with multiple mounting directions of a motor. The system comprises a main beam and at least one rotary speed reducer, one rotary speed reducer is connected with the motor, the rotary speed reducer is in transmission connection with the motor through a transmission shaft, and the lower portion of a shell of the rotary speed reducer is provided with an installation position where the motor can be placed. Through the arrangement of the mounting position, when the main beam rotates, the main beam does not collide with the motor, the stability of equipment during operation is guaranteed, and the motor is arranged at the mounting position, so that the space occupancy rate is reduced, and the whole rotary speed reducer is more attractive.

The invention relates to the technical field of medical instruments, in particular to a stomach tube fixing device which comprises a sleeve capable of being arranged on a stomach tube in a sleeving mode, an air bag is arranged on the inner wall of the sleeve and communicated with an inflation mechanism for inflating the air bag, and a nose clip is connected to the outer wall of the sleeve. According to the stomach tube fixing device, the stomach tube can be stably fixed, loosening of the stomach tube is avoided, the outer end of the stomach tube can be stored and fixed, and the outer end of the stomach tube can be disinfected. The problems that an existing fixing mode is prone to causing loosening of the stomach tube and the outer end of the stomach tube is prone to being polluted when notused are solved.

A rotary lock catch structure of a dust collector battery pack comprises a battery pack shell, a lock catch mechanism is arranged in the battery pack shell, the lock catch mechanism comprises a buckleand a rotating rod matched with the buckle, the buckle is fixed to the rotating rod, and the rotating rod is rotatably arranged in the battery pack shell; a clamping groove corresponding to the buckle is formed in the battery pack shell, and meanwhile, a switch structure acting on the rotating rod is arranged on the battery pack shell; according to the battery pack lock catch structure designed by the scheme, the rotating rod is matched with the buckle; the buckle is rotated around the axis of the rotating rod, flexible switching between unlocking and non-unlocking of the buckle is achieved,the rotary lock catch structure is different from a traditional lock catch structure, and the buckle is made to move between the clamping position and the loosening position in a rotating mode throughingenious structural design.

The invention discloses a demountable spinning bobbin. The demountable spinning bobbin comprises a bobbin body, edge discs arranged at the two ends of the bobbin body and fiber strands arranged on the edge discs. The demountable spinning bobbin further comprises thread connecting pieces. An outer thread is arranged at one end of each thread connecting piece. Each thread connecting piece is provided with protruding blocks. Inner threads are arranged at the two ends of the bobbin body. Each edge disc is provided with a plurality of grooves matched with the protruding blocks. The edge discs are arranged at the two ends of the bobbin body through the thread connecting pieces. When the bobbin is installed, the protruding blocks are inserted into the grooves, and then the thread connecting pieces are screwed onto the inner threads of the bobbin body. If the edge discs are damaged, the thread connecting pieces can be unscrewed from the bobbin body, and then the edge discs can be taken down for replacement. Accordingly, the edge discs can be independently replaced under the situation that the edge discs are damaged, and accordingly the production cost can be reduced.

The invention discloses an expanding bag and a production process thereof. The expanding bag comprises an outer bag and at least one inner sheet. The outer bag comprises a bag body and a bag cover. The bag body comprises a front plate and a rear plate which are connected through folding sheets at the two ends. Two sides of the at least one inner sheet are fixed on the folding sheets at the two ends of the bag body respectively, two ends of the folding sheets are connected onto the front plate and the rear plate through hot pressing, connection positions are in eight double vertical line shapes, and the connection is achieved through a hot press and a mold, on the upper portion of which live wire heating wires are mounted. The at least one inner sheet is 0.15mm thick, and the wall of the outer bag is 2mm thick. According to the expanding bag and the production process thereof, connections of all portions are firm, the at least one inner sheet cannot get loose even if the expanding bag is used for a long time, the production cost is low, and the application range is wide.

The invention provides a cable pre-tensioning device for power construction. The cable pre-tensioning device is novel in structural design. The cable pre-tensioning device comprises a shell, the inner wall of one side of the shell is connected with an upper connecting shaft through a bearing, the exterior of the upper connecting shaft is connected with a worm gear and a driving belt wheel through flat keys, the inner walls of the two sides of the shell are connected with worms through bearings, the worms are meshed with the worm gear, and the inner wall of one side of the shell is connected with a lower connecting shaft through a bearing; the outer portion of the lower connecting shaft is connected with a winding wheel and a driven belt wheel through flat keys, a transmission belt is in transmission connection between the driven belt wheel and the driving belt wheel, a connecting rope is wound in the winding wheel, a lock sleeve is arranged at the bottom end of the connecting rope, and the outer wall of one side of the shell is connected with a motor through bolts. According to the design, the driving belt wheel with the small diameter is used for driving the driven belt wheel with the large diameter to rotate through the transmission belt, so that the winding wheel can obtain large pulling force when winding the connecting rope, the cable is pre-tightened, the pulling force is larger, and the pre-tightening effect of the cable is better.

The invention discloses a mechanical jam adjusting device for a GW4 type disconnector. The mechanical jam adjusting device comprises a shell, a left hoop sliding in or out from the left side of the shell, a right hoop sliding in or out from the left side of the shell, a driving device arranged in the shell and used for driving the left hoop and the right hoop to slide in or out at the same time, and an insulation handle fixed on the shell. The device has the advantages that an operator stands on the ground, holds the base of the GW4 type disconnector through the cooperation of the shell and the left and right hoops, and then applies a force through the insulation handle to rotate the base, thus effectively protecting the personal safety of the operator; due to adoption of a chain wheel and a gear in the driving device part, the locking force between the sliding part and the left and right hoops can be ensured effectively and the looseness situation during the operation process can be avoided.

The invention discloses a single main girder multi-point drive solar tracking system, comprising a main girder and at least one rotary reducer, wherein one rotary reducer is connected with a motor; the rotary reducer connected with the motor is an active rotary reducer, The other rotary reducers are driven rotary reducers, and the torque of the active rotary reducer is transmitted to the driven rotary reducer through the transmission shaft; the rotary reducer, the transmission shaft and the main beam are set to rotate in the same direction synchronously. In the present invention, the drive shaft and the main beam move in the same direction synchronously, and then the drive shaft can be supported by the main beam, and the drive shaft is not easy to twist or break, and has a long service life, and under this structure, the diameter of the drive shaft does not need to be set If it is too large, the equipment investment cost is low; and because the transmission shaft, motor, and main girder are all rotated synchronously, the photovoltaic panel will not collide with the transmission shaft during the turning process of the main girder, and the adjustable angle of the main girder is larger and more flexible. The degree is higher, and the service life of the equipment is extended.

The invention relates to a building assembly type intelligent detection device based on rapid installation. Inner grooves are formed in the opposite wall surfaces of two main bodies, top grooves are formed in the outer sides of the tops of the inner grooves, turnover plates are movably arranged in the inner grooves, top blocks are arranged at the tops of the turnover plates, the top blocks are in magnetic connection with the turnover plates, and guide blocks are arranged in the outer sides of the top blocks; the bottoms of the guide blocks are connected with the top groove through reset springs, and the bottoms of the front wall face and the rear wall face of the turnover plate are rotationally connected with the inner groove through connecting shafts. An ejector rod and an insertion rod are arranged between the two main bodies, the ejector rod and the insertion rod are connected with the two main bodies respectively, the ejector rod is movably connected with the insertion rod, and the outer side walls of the two main bodies are each provided with three auxiliary plates; mounting grooves are formed in the front wall surfaces of the two main bodies, moving blocks are arranged in the mounting grooves, the bottoms of the moving blocks are connected with the mounting grooves by arranging the springs, pull rods are connected to the outer sides of the moving blocks, and wireless infrared fences are detachably connected to the front wall surfaces of the main bodies through the moving blocks.