202results about How to "Realize automatic retraction" patented technology

A combined system of an unmanned ship and an unmanned submersible comprises the unmanned ship located on the water surface and the unmanned submersible located underwater. The unmanned ship and the unmanned submersible are connected through an umbilical cable. A power twisted pair for power supply and duration and a signal line for transmitting control signals and data signals are contained in the umbilical cable. An unreeling system for automatically reeling and unreeling the umbilical cable is arranged on the unmanned ship and comprises an unreeling winch used for twisting the umbilical cable, an unreeling steering engine for controlling the unreeling winch to rotate to reel and unreel the umbilical cable and an encoder for measuring the unreeling length. A butt joint berthing device is arranged between the unmanned ship and the unmanned submersible. By the adoption of the combined system, the umbilical cable is reeled and unreeled through the unreeling system, and the underwater locating accuracy is improved; the unmanned submersible and the unmanned ship can be in butt joint stably through the butt joint berthing device, the butt joint berthing device is driven by the unmanned ship to move on the water surface, and the navigation efficiency is improved; and when underwater observation is needed, the unmanned submersible can be automatically separated from the unmanned ship, and the launching depth of the unmanned ship is controlled through the unreeling system.

The invention discloses an automatic coiling and uncoiling device for a distribution circuit power cable. The automatic coiling and uncoiling device comprises a base, wherein a chamber I is arranged at the bottom of the base; a sliding plate is arranged in the chamber I; universal idler wheels are arranged at four corners at the lower end of the sliding plate; an extension spring is arranged between the sliding plate and the top wall of the chamber I; a jacking device is arranged on the base; a coiling device, a tensioning device and a cable uncoiling device are arranged on the base in turn; the coiling device comprises an outer support ring and an inner support ring; a rolling structure is arranged between the outer support ring and the inner support ring; a rotating ring is fixedly connected with the middle part of the inner support ring; coiling plates are respectively arranged at the two ends of the rotating ring; the tensioning device comprises a tensioning bracket and a tensioning roller; the two ends of the tensioning roller are arranged on the tensioning bracket; and the cable uncoiling device comprises an uncoiling mechanism capable of reciprocating and an uncoiling driving motor connected with the uncoiling mechanism. According to the invention, the coiling device, the tensioning device and the cable uncoiling device are successively arranged, so that the automatic coiling and uncoiling of the cable can be realized and the winding intensity, tightness and uniformity of the cable can be guaranteed.

The invention relates to a wireless charging system and a wireless charging method of an unmanned aerial vehicle. The wireless charging system comprises an electric-collecting unmanned aerial vehicle and a wireless charging device, wherein the electric-collecting unmanned aerial vehicle comprises a first communication module for transmitting charging request information to the wireless charging device; the wireless charging device comprises a second communication module and a plurality of electric-supply unmanned aerial vehicles; the second communication module is used for receiving the charging request information from the electric-collecting unmanned aerial vehicle, and is also used for transmitting a travelling command to an idle electric-supply unmanned aerial vehicle; and each electric-supply unmanned aerial vehicle is used for synchronously flying with the electric-collecting unmanned aerial vehicle and performing wireless charging on the electric-collecting unmanned aerial vehicle after the travelling command is received. According to the wireless charging system and the wireless charging method disclosed by the invention, the charging requirements of a plurality of electric-collecting unmanned aerial vehicles can be met at the same time; the electric-supply unmanned aerial vehicles adopt a charging manner of synchronous flying, so that charging delay of the electric-collecting unmanned aerial vehicle is greatly reduced; and the electric-supply unmanned aerial vehicles adopt a wireless charging manner to provide electric quantity for the electric-collecting unmanned aerial vehicle, so that the problem that electric leakage and electric shock are liable to generate caused by that a plug is exposed is effectively solved.

The invention discloses an intelligent clothes airing device. The intelligent clothes airing device comprises a stand column, a cross bar, a clothes airing rack and a control system. A first electrical machine is arranged on the stand column, a first pulley and a second pulley are arranged above the cross bar, and a steel wire rope is arranged between the first electrical machine and the clothes airing rack. A wire wheel is arranged at an output shaft of the first electrical machine, and one end of the steel wire rope is wound on the wire wheel. The other end of the steel wire rope winds though the first pulley, the clothes airing rack and the second pulley in sequence to be fixed on the wire wheel. The clothes airing rack comprises a cylindrical rack body and an annular clothes rack which is arranged on the cylindrical rack body, the annular clothes rack is arranged on the cylindrical rack body through a connecting shaft, and the upper end of the cylindrical rack body is connected with a second electrical machine. The control system comprises a tension sensor, a temperature sensor, a light sensor, a position sensor and a controller. The intelligent clothes airing device has a rain-proof function and a sun-proof function, the intelligent clothes airing device can further achieve automatic rotation when clothes are aired and automatic taking back after the clothes are dry, and the problem that damage of the clothes caused by the clothes not taken back for a long time is effectively avoided.

The invention provides a solar panel folding device, and relates to the technical field of mechanism design. The solar panel folding device comprises a base which is a rectangular flat plate and havefour corner respectively provided with plate type supports, two motors are arranged in parallel at one side of a short side of the base through L-shaped motor bases, the end portion of a motor shaft is provided with small gears engaged with large gears, the large gears are fixed with the middle portions of rotating shafts, a folding mechanism comprises four folding arms, and each is formed by twofour-rod mechanisms; the tail ends of upper swing rods are hinged with the upper portions of the plate type supports, the front ends of the upper swing rods are provided with gears and are hinged withthe upper corners of the left sides of a door-shaped connecting rods; the tail ends of lower swing rods are fixedly connected with the rotating shafts at the inner sides of the plate type supports, and the lower ends of the left sides of the door-shaped connecting rods of the front ends of the lower swing rods are hinged to form a first four-rod mechanism; and a second four-rod mechanism is located at the front end of the first four-rod mechanism, and the first and second four-rod mechanisms are the same in the structure, and are opposite in arrangement.

The invention discloses a fully-automatic blood extraction centrifuging device and an extraction centrifuging method thereof. Before operation such as a blood cross-matching test is conducted in a hospital or a laboratory, currently, medical care personnel or test personnel need to transfer to-be-tested blood in sample tubes into test tubes, then the blood is centrifuged, and therefore operation is cumbersome. The fully-automatic blood extraction centrifuging device comprises a rack, a lifting-type centrifuging mechanism, a blood vessel clamping mechanism, a cutting mechanism, a tool storage mechanism and a tool transport mechanism; the tool storage mechanism comprises a circular tool disc, a tool disc rotating shaft, a tool disc driving motor, a fixed pushing block, a tool storage rack and a first reset spring; and the cutting mechanism comprises a cutting rotating shaft, a rotating motor, a rotary cantilever, a tool box assembly, a tool box driving assembly and a tool box sliding block. The blood in the sample tubes is transferred into the test tubes on a centrifuging rotating disc through instrument automation, blood centrifuging required before blood cross-matching is conducted, and previous complex operation is replaced.

The invention belongs to the technical field of new energy devices, and specifically relates to a new energy vehicle charging pile, which comprises a pile body.A first chamber is formed in the pile body, a wire winding mechanism is rotatably arranged in the first chamber, a charging cable is arranged in thewirewinding mechanism, the charging end of the charging cablepenetratesthrough the inner wall of the front end of the first chamber and is connected with a charging gun, a second chamber is arranged in the pile body, the second chamber is located below the first chamber, the bottom of the second chamber is rotatably connected with a driving mechanism, the driving end of the driving mechanism penetrates through the top surface of the second chamber and extends into the first chamber, thedriving mechanism is connected with the wire winding mechanism, a second groove is formed in the side wall of the front end of the pile body, a through hole communicating with the second chamber is formed in the inner wall of the second groove, and a magnetic sensing device is arranged in the through hole in a penetrating mode.Accordingto the new energy vehicle charging pile,when a vehicle parksina parking spot in front of the charging pile, the charging wire can be discharged and electrified, and the charging pile also has an anti-collision function.

A ground master-slave Cable reel installation of a mining excavator relates to the auxiliary equipment of the mining excavator. The device comprises a cable reel and is characterized in that the cable reel is horizontally arranged on an under frame; the under frame is also equipped with a speed reducer, a high-voltage slip ring transmission box, a cable guide mechanism, a long locked-rotor motor and an electric control cabinet; wherein, power supply of the high-voltage slip ring transmission box is connected with the long locked-rotor motor which drives the speed reducer; a gear shaft of the speed reducer drives the cable reel; the high-voltage slip ring transmission box is connected with a cable of the electric control cabinet; the cable guide mechanism is arranged behind the cable reel; lugs are welded at four corners of the under frame. The device has the advantages of good automatic reeling effect of the cable, low construction cost, easy operation and good device stability, etc.

The invention discloses a combined automatically-liftable intelligent domestic wall cupboard which comprises a dustproof wall cupboard body and a storage cabinet body. Connecting rods are rotatably connected to two surface walls of the inside of the dustproof wall cupboard body through first rotary shafts, and the other end of each connecting rod is rotatably connected with the storage cabinet body through a second rotary shaft. In the combined automatically-liftable intelligent domestic wall cupboard, a gear wheel can be driven to walk on a rack arranged in an annular groove through a secondelectric motor fixed on the connecting rods, the connecting rods are driven to rotate, accordingly the storage cabinet body in the dustproof wall cupboard body can be turned out from the dustproof wall cupboard body, and the storage cabinet body automatically descends in height to be located on the outer side of the dustproof wall cupboard body. Accordingly, articles are convenient to take, the connecting rods can be driven to rotate through the second electric motor when the wall cupboard is used, the storage cabinet body is automatically turned into the dustproof wall cupboard body, the intelligence degree is high, automatic storage can be achieved, manual operation is not needed, and the wall cupboard is very convenient.

The invention relates to an electric cable reel installation. The electric cable reel installation comprises a base plate, a motor, a reducer and a cable winding wheel disk; the output shaft of the motor is provided with a driving wheel; the input shaft of the reducer is provided with a driven wheel; the driving wheel is in transmission connection with the driven wheel through a belt; the cable winding wheel disk comprises a middle cable winding shaft and round lateral fences positioned on two sides of the cable winding shaft; trunnions are arranged on two sides of the cable winding wheel disk; the cable winding wheel disk is arranged on two supports through the trunnions; the trunnions are rotationally connected with the supports through bearings; the output shaft of the reducer is fixedly connected with one of the trunnions of the cable winding wheel disk through a coupler. The electric cable reel installation is simple in structure; the motor is started to enable the cable winding wheel disk to automatically rotate, so that a cable is automatically wound and released. The time for manually winding and releasing the cable is greatly shortened, and the working efficiency is improved.

The invention discloses a balance weight locking device for engineering machinery. The engineering machinery comprises a balance weight lifting base provided with a lift opening at the top; the balance weight locking device comprises a rocker arm (3) hinged on a rotary table (7) of the engineering machinery through a pin shaft (4); two end parts of the rocker arm (3) are respectively hinged with push rods (2); the tail ends of the two push rods (2) are respectively connected with locking components; and the rocker arm (3) rotates around the pin shaft (4) under the action of a power component to drive the two locking components to insert and separate from the lift opening. The invention also discloses the engineering machinery comprising the balance weight locking device. The engineering machinery and the balance weight locking device ensure that both sides of a balance weight are locked on the basis of reliably locking the balance weight.

The invention provides a waterproof automatic cable winding and unwinding device, which is suitable for mining and engineering construction equipment. The device mainly comprises a cable reel main body, a reel main body fixation frame, a cable arrangement device assembly, a driving assembly, a cable sheath assembly and a power supply cable. The driving assembly is connected with the cable reel main body through a driving chain; the driving assembly is connected with the cable arrangement device assembly through the driving chain, the cable reel main body and a driven chain; and the driving assembly drives the cable reel main body to rotate so as to drive the cable arrangement device assembly to carry out cable arrangement on the power supply cable on the cable reel main body. The device can reduce cable wear, reduces workload and labor intensity of operation personnel, not only facilitates collection and discharge of the cable, but also can prevent the cable from twisting; the device is simple in structure and convenient to operate, prevents generation of major safety accidents, saves human dragging and can realize uniform cabling; and the device can be used along, and can also beused for mining and engineering and pipeline construction equipment.

The invention provides a locking device for a multistage actuating cylinder. The locking device comprises an end cover, an outer barrel, a middle barrel, an inner barrel, upper and lower sliding sleeves, upper and lower unlocking sleeves, upper and lower locking clamp rings, upper and lower limiting clamp rings, connecting screws, upper and lower elastic elements as well as upper and lower steel balls. A highly bearing steel ball locking mechanism is combined with the multistage actuating cylinder, so that the mechanism has high bearing capacity in a locked state, guarantees long unfolding travel of the actuating cylinder, realizes a reusable function on the basis of reliable locking and unlocking, and is applicable to landing support legs of reusable launch vehicles; meanwhile, the mechanism is simple to machine, convenient to mount, capable of realizing automatic collection and release and long in service life.

The invention discloses an anchoring truck horizontal support arm system, comprising two horizontal support arms which are respectively arranged at both sides behind an anchoring truck revolving platform; every horizontal support arm comprises a first arm joint and a second arm joint; the first end and the tail end of the first arm joint are respectively hinged with the side part of the revolving platform and the first end of the second arm joint; a first driving part is arranged between the first arm joint and the revolving platform, a second driving part is arranged between the first arm joint and the second arm joint; when the horizontal support arm is in a folding state, the first arm joint and the second arm joint are orderly folded at the side part of the revolving platform; when two horizontal support arms are unfolded, two first arm joints are folded and assembled to form an operation platform located at the back end of the revolving platform. The horizontal support arm can be automatically folded and unfolded; after the horizontal support arms are unfolded, the horizontal support arms can be combined to form one operation platform located at the back end of the revolving platform, thereby facilitating the installation and overhaul of the load. The invention further discloses an anchoring truck with the horizontal support arms.

The invention relates to a dissecting table for cervical vertebra surgeries of medium and small sized animals. The dissecting table comprises a worktable body, a head rack and a foot rack, wherein the head rack is connected with the worktable body through a hinge shaft, a semi-cylindrical bolster is arranged on the head rack, a screw is arranged under the bolster and is embedded into a bolster sliding groove and used for adjusting and fixing the position of the bolster, a limb binding band for fixing the corresponding limb of an experimental animal is installed at the four corners of the worktable body respectively, and the four limb binding bands are adjusted or fixed to four diagonal binding band sliding grooves through screws. The dissecting table has the advantages that when the dissecting table is used for animal dissection, the head of the experimental animal can be effectively placed to enable the cervical vertebra of the experimental animal to be fully exposed; the placement angle of the head of the experimental animal can be adjusted according to the size and shape of the experimental animal; the head of the experimental animal can be firmly fixed, automatic retraction of the neck skin of the experimental animal can be achieved, labors can be saved, and the surgical efficiency can be improved.

The invention discloses a heavy road cone pick-up and arranging robot, relating to the field of intelligent traffic mechanical equipment. The heavy road cone pick-up and arranging robot comprises a road cone storage rack placed on a body and a longitudinal transfer mechanism for moving the road cones back and forth, wherein an image identification system, a road cone pick-up and arranging manipulator and a transverse transfer mechanism are arranged on the road cone storage rack; the image identification system is used for identifying the positions of the road cones on a pavement; the road cone pick-up and arranging manipulator is used for picking up road cones arranged on the pavement and placing the picked-up road cones on a transverse storage platform, as well as picking up road cones from the transverse storage platform and arranging the road cones on the pavement; and the transverse transfer mechanism is used for moving the road cones left and right. The heavy road cone pick-up and arranging robot has the advantages of dispensing with manual participation in the whole working process, reducing risk in operation, lowering labor intensity, saving manpower and improving operational efficiency.

The invention discloses an automatic cable core distribution device. The automatic cable core distribution device comprises a frame, a single mode double screw mechanism, a rear pull power mechanism,a wire positioning mechanism and a cable clamp, wherein the lower portion of the frame is provided with a guide rail, the single mode double screw mechanism is arranged on the guide rail, the rear pull power mechanism is arranged at a back side of the single mode double screw mechanism and is used for driving the single mode double screw mechanism to integrally sliding forth and back on the guiderail, the wire positioning mechanism is arranged at a front side of the single mode double screw mechanism and is used for positioning a front end of a cable, the cable clamp is arranged above the wire positioning mechanism and is used for clamping the cable, the single mode double screw mechanism comprises an upper screw assembly, a lower screw assembly, an upper screw power assembly, a lower screw power assembly, a crimping assembly and a distribution assembly mounted on the one same module, and cable cores are distributed when the crimping assembly and the distribution assembly contact. Theautomatic cable core distribution device is advantaged in that efficiency is high, the whole process is automatic, labor force is substantially saved, and the distribution quality is guaranteed.

The invention discloses an artificial meal forming machine which comprises a frame body, a power part, a feeding part and a working part. The right end of a screw rod in the working part is connected with a shaft sleeve by a sliding key, the shaft sleeve is connected with a motor by a transmission mechanism, and a thread is designed on the inner surface of the shaft sleeve; the left end of a screw rod sleeve is a water-jacket type structure; a segmentation thread is arranged on the screw rod, and a reverse thread is designed at the breaking-off part of the segmentation thread; the screw rod is designed into a blind pipe, the right end of the screw rod is open, and the blind pipe is provided with a heating core. With the characteristics of adopting double heating, using the lengthened screw rod, and designing plus as well as reverse threads on the screw rod, the artificial meal forming machine is beneficial for improving the fibrousness and taste of a product due to formation of multidirectional segmentation extruding; moreover, the artificial meal forming machine can realize automatic withdrawing of the screw rod and is more convenient and quicker compared with a traditional manual pull rod.

The invention relates to a construction hoist with built-in balance weights. The construction hoist comprises hoisting cages, wheel carriers, the balance weights, guide frames and a wall attaching frame and further comprises winding assemblies, wherein steel wire ropes are wound on the wheel carriers, each balance weight is connected with one end of each steel wire rope, the wall attaching frame is fixed on the guide frames, each winding assembly is connected with the other end of each steel wire rope, the winding assemblies are connected with the hoisting cages, connecting devices which are connected with the balance weights are arranged on the steel wire ropes, connecting pieces which are matched with the connecting devices are arranged on the balance weights, a limiting device is arranged at the top of each balance weight, an interlocking assembly which enables a hoisting cage safety gate to be safely opened is arranged on each hoisting cage, and a protective door electromechanical interlocking device which enables a hoisting cage protective door to be normally opened is arranged on each hoisting cage. The construction hoist has the advantages that automatic collecting and releasing of the steel wire ropes can be achieved in the rising and section adding process through the winding assemblies, therefore, labor intensity of installation personnel is lowered, and safety performance of the equipment in the operation process is improved due to the fact that the interlocking assembly which enables the hoisting cage safety gate to be safely opened is arranged on each hoisting cage and the protective door electromechanical interlocking device which enables the hoisting cage protective door to be normally opened is arranged on each hoisting cage.

The invention discloses an automatic winding and unwinding device for an anti-explosion cable drum. The device comprises a cable drum hydraulic motor, and an oil supply pipe and an oil return pipe of the cable drum hydraulic motor, wherein an overflow control system is arranged between the oil supply pipe and the oil return pipe; the overflow control system comprises a hydraulic control reversing valve and a one-way valve which is arranged on the oil supply pipe; a winding control oil pipeline and an oil leakage pipeline connected with the oil return pipe are arranged on the oil inlet side of the one-way valve; a high-pressure overflow valve is arranged on the winding control oil pipeline; an unwinding control oil pipeline connected with the oil return pipe is arranged on the oil outlet side of the one-way valve; a low-pressure overflow valve is arranged on the unwinding control oil pipeline; the winding control oil pipeline is connected at the winding control position of the hydraulic control reversing valve; the oil leakage pipeline and the unwinding control oil pipeline are connected at the unwinding control position of the hydraulic control reversing valve; and the control reversing oil inlet of the hydraulic control reversing valve is connected with the oil supply pipe of the oil outlet side of the one-way valve. The device realizes the automatic winding and unwinding of a cable, buffer and shock absorption, and overload protection, and can effectively increase the running distance of equipment, improve the running speed of the equipment, and improve the work efficiency of the equipment.

The invention relates to the field of laundry racks, in particular to a multifunctional intelligent exterior wall laundry rack. The multifunctional intelligent exterior wall laundry rack includes a rack body, a shelter, a control unit, a translating assembly, a telescopic assembly, a flipping assembly, two illumination sensors and a humidity sensor, wherein the rack body is fixed to an exterior wall, and the shelter is fixed to the exterior wall and located above the rack body. The multifunctional intelligent exterior wall laundry rack comprises a multi-degree-of-freedom mechanism, a temperature sensor, the humidity sensor and a control system, and has high intelligence and convenience, wherein the multi-degree-of-freedom mechanism can realize reversing of multiple pieces of clothes at thesame time. A laundry rod at the tail end of the laundry rack can achieve two translational movements, and hooks can achieve rotation of nearly 180 degrees around their own rotating axes with respectto the laundry rod. The laundry rack has various functions, can realize automatic retraction, reversing and light chasing of clothes. The laundry rack comprises the multi-degree-of-freedom mechanism driven by a small motor, and can realize high-quality drying of more clothes at the same time.

The invention discloses an automatic recovery charger nest for a vertical take-off and landing fixed-wing unmanned aerial vehicle, which comprises a cabin body and an openable top cover mounted at the top of the cabin body, an inner cabin is further mounted in the cabin body, the height of the inner cabin is the same as that of the cabin body, a rotating mechanism is further arranged in the inner cabin, a clamping and centering device is mounted at the top of the inner cabin. The clamping and centering device is further provided with a locking and charging device. The locking and charging device comprises a base connected with the clamping and centering device and a pneumatic hydraulic clamp connected to the base and used for charging. The nest provided by the invention can realize automatic folding and unfolding, automatic charging, unattended operation and data uploading. Remote real-time monitoring is achieved, an automatic mode can be removed, manual remote operation is achieved, and a vertical take-off and landing unmanned aerial vehicle and a multi-rotor unmanned aerial vehicle can be compatible.

The invention discloses an automatic plate collecting and placing device, which belongs to the technical field of plate pieces, and comprises a rack, a conveying mechanism and a lifting mechanism. Theconveying mechanism is connected to the rack; the lifting mechanism is located under the conveying mechanism, and comprises a drive part connected to the rack and a lifting workbench connected with the drive part; the lifting workbench is slidably connected to the rack; and the drive part drives the lifting workbench to lift up or down along the rack. According to the automatic plate collecting and placing device provided by the invention, through arranging the conveying mechanism and the lifting mechanism, plate pieces are automatically collected and placed instead of being manually collected and placed, so that the efficiency is improved.

The invention discloses a use method for a retractable automotive wind-driven generator and belongs to the technical field of wind power generation. A telescopic frame is formed by combining a plurality of telescopic rods different in diameter, the adjacent telescopic rods are in seal connection and in mutual nested fit, and the telescopic rods can move in the axial direction when being subjected to axial pressure. A first accumulator is connected with a pneumatic pushing device which comprises a pneumatic press. The pneumatic pushing device is connected with the lower portions of the telescopic rods and produces positive air pressure or negative air pressure towards the telescopic rods. Three cavities are formed in the top of an automobile. A second accumulator is arranged in the telescopic rods and connected with a rotation motor. The rotation motor is in transmission connection with a fan brake device and controls the fan brake device to rotate. The use method for the retractable automotive wind-driven generator is simple, high in stability, low in cost and convenient to popularize and use.

The invention provides an underground alternating current charging pile for an electric vehicle. The underground alternating current charging pile for the electric vehicle comprises a charging pile main body. The charging pile main body is fixedly arranged on a wall of an underground garage. One side of the charging pile main body is provided with a first wire wheel by a wheel frame and a torsionspring. One side of the charging pile main body is provided with a T-shaped rail. The T-shaped rail is installed on the wall through the fixing device. An opening is formed in the T-shaped rail. A plurality of T-shaped blocks are installed in the T-shaped rail. The distance between two adjacent T-shaped blocks is equal. The T-shaped blocks can slide along the T-shaped rail correspondingly. A firstrack is installed on the lower portion of the T-shaped rail. The bottom surface of the T-shaped blocks is fixedly connected with the top surface of the first rack. A through hole is formed in the oneside of a vertical block of each T-shaped block. All the through holes are arranged outside the T-shaped rail. The central lines of the through holes are collinear. According to the mutual fit of a second wire wheel, a cotton rope, an inverted-L-shaped rod and a contact switch, so that the charging pile main body enters into the shutdown state when no one using, the consumption of electricity isgreatly reduced, and the energy is saved.

The invention discloses a pen capable of automatically retracting a refill during falling. The pen capable of automatically retracting the refill during falling comprises a pen clip, a pen holder, therefill, a pen point, a linkage component, a balance weight, a spring I and a spring II, wherein the linkage component, the balance weight, the spring I and the spring II are arranged in the pen holder; an outer flange is arranged on the circumferential surface of the bottom of the refill, the spring II sleeves the refill which is located below the outer flange, a cylindrical boss is arranged on the upper end surface of the pen point, and a through hole used for allowing the refill to penetrate through is formed in the middle of the cylindrical boss; the spring I is fixed into a pen body, andthe balance weight is connected to the upper end of the spring I; and a hole is formed in the upper part of the pen holder and used for supporting and limiting the linkage component, an inclined surface is formed at the bottom of the linkage component which is located in the pen holder; and the inclined surface is used for making contact with the top end of the balance weight. According to the pencapable of automatically retracting the refill during falling, the special linkage component is adopted, and the balance weight and the springs are added on the basis of a general pen structure; andthe function of automatically retracting the refill during the falling of the pen, and the function of retracting the refill during shaking for the pen are realized on the basis of general ball-pointpen functions.

The invention discloses an air passage ring cutting tool for a pantograph pan. The air passage ring cutting tool for the pantograph pan comprises a support (1), a cutting control rod (3), a dial indicator (7) and a transmission member (4). A cutting blade (2) is rotatably arranged on the support (1). The cutting control rod (3) is arranged on the support (1) in a vertical moving mode in the height direction of the support (1), and an air passage clamping mechanism (5) is arranged at one end, facing the cutting blade (2), of the cutting control rod (3) to form an air passage ring cutting chamber (6) with the cutting blade (2). The dial indicator (7) is fixedly arranged on the support (1) and is provided with a measuring rod (8). One end of transmission member (4) is connected with the cutting control rod (3), and the other end of the transmission member (4) is matched with the measuring rod (8), so that the displacement amount of the cutting control rod (3) is reflected in reading numbers of the dial indicator (7) through the measuring rod (8). Therefore, precise control of the blade feeding amount of the air passage cutting bade is achieved, uniformity of the depth of all thin grooves in a copper pipe of the air channel is ensured, and the safe operation of a haulage motor is ensured.

The invention discloses a fire-fighting truck capable of supplying water in long distance. The fire-fighting truck capable of supplying water in long distance comprises a fire-fighting truck body, wherein a water channel structure on the fire-fighting truck comprises a water pump; discharged water of the water pump is divided into two paths; one path is connected with a washing water tank, and the other path is connected with a fire fighting water hose; a water inlet pipeline connected with a water inlet of the water pump is divided into a pipeline A and a pipeline B; the water inlet pipeline A comprises a check valve A, a water discharging ball valve A and a vacuum pump; the water inlet pipeline B comprises an automatic backwashing filter, a check valve B and a butterfly valve which are sequentially connected with one another in series. The fire-fighting truck body is also provided with an automatic water hose winding and unwinding device, a hose winding guiding device and a foldable step ladder. By virtue of the fire-fighting truck capable of supplying water in long distance, the requirements on a water source for long-distance fire-fighting water supply and winding, unwinding and washing of the fire-fighting water hose can be effectively met, and the long-distance fire-fighting water supply requirements are met; the fire-fighting truck capable of supplying water in long distance has a significant industrial application value and can be widely popularized and applied.

The invention relates to follow-up power supply equipment of a wharf shore power supply system. The follow-up power supply equipment is characterized by comprising a mobile carrier, a cable capstan and an induction support. By sensing of a trigger, automatic winding and unwinding of a power-driven motor of the cable capstan are achieved, and an accident that a cable is broken by pulling or the cable is pinched off by a ship rail and a wharf due to untimely winding and unwinding by manual is effectively prevented; meanwhile, by the system, the problem that the cable shall not be frequently wound and unwound when a ship freely swings due to wave movement is also solved; and according to height difference between the sea-based induction support and the wharf, the accident that power supply to the power supply equipment is abnormal due to the height difference between the wharf and the sea-based induction support is prevented by employing different cable groove openings.