31results about How to "Realize retractable function" patented technology

The invention belongs to the technical field of vehicle-borne radars, and particularly relates to a high-mobility large-scale radar vehicle. The radar vehicle comprises an assembling platform and an electronic equipment cabin, wherein leveling supporting legs are arranged on the lower plate surface of the assembling platform; a fixed antenna and a folded antenna are arranged at the electronic equipment cabin; the folded antenna is driven by a hydraulic driving assembly, so that two position conditions of withdrawing and unfolding are generated along a vertical surface; when the folded antenna is under a withdrawing condition, the antenna plate surface of the folded antenna is vertically arranged, when the folded antenna is under an unfolding condition, the antenna plate surface of the folded antenna is horizontally arranged, and the antenna plate surface of the folded antenna and the antenna plate surface of the fixed antenna are in the same plane; and the radar vehicle also comprises a servo control system and an electric generating system. According to the high-mobility large-scale radar vehicle disclosed by the invention, the situation that the width and the height are not exceeded during the transporting of radar antennas can be guaranteed, functions of quick erecting and quick removing of an antenna array surface can also be realized, and finally, the high mobility of the ground vehicle-borne radar is guaranteed.

The invention relates to the technical field of aircraft hydraulic system design, in particular relates to an automatic retractable hydraulic device for an unmanned aerial vehicle undercarriage. The automatic retractable hydraulic device for unmanned aerial vehicle undercarriage comprises an oil tank (1), a quantitative hydraulic pump (2), a variable frequency motor (3), an oil filter (4), an undercarriage retracting electromagnetic valve (5), an overflow valve (6), a first pressure sensor (7), an undercarriage retracting actuator cylinder (8) and a second pressure sensor (9). The undercarriage retracting system with the structure has the advantages of simple structure, unrestricted installation location and low requirements on oil precision, omits a valve controlled throttle governing servo hydraulic system, avoids the system temperature rise and low efficiency caused by the throttling loss and overflow loss, and at the same time abandons the electro-hydraulic servo valve with high cost to realize low cost.

The invention belongs to dilators and particularly relates to a cervical dilator. The cervical dilator comprises a dilating head, a dilating frame, an inner core, a connecting rod and bilateral side handles which are sequentially connected mutually; the rear end of the dilating head is connected with the dilating frame; the dilating head and the dilating frame are in circular hollow structures; the dilating frame comprises an upper portion fan-shaped side, a lower portion fan-shaped side and symmetrical dilating sheets on bilateral sides. According to the cervical dilator, the dilating effect is good, the utilization method which is similar to that of original pliers and scissors is convenient, a cervix uteri is externally opened through the dilating sheets, collecting and releasing functions of opening are achieved according to the principle of a fan-shaped shed-shaped support and in combination with matching of the inner core and the dilating frame through flexible hinged supporting points installed at support joints, cervical damage caused by normal dilation is avoided.

The invention relates to an undercarriage rising and landing control hydraulic device for a helicopter. According to the hydraulic device, a variable-frequency motor is adopted to control a quantitative hydraulic pump, and the rotating speed of the motor is changed to control the flow of a system, and therefore rising and landing of an undercarriage are achieved. By means of the undercarriage rising and landing system of the structural form, the structure is simple, the installation position is not limited, the requirement for the precision of oil liquid is low, a valve-control throttling speed-adjusting servo hydraulic system is abandoned, the problems that the temperature of the system is increased and the efficiency is low due to throttling losses and overflow losses are avoided, and meanwhile electro-hydraulic servo valves very high in manufacturing cost and electromagnetic reversing valves large in pressure impact are abandoned.

The invention relates to an intelligent wheelchair based on internet of things. The intelligent wheelchair based on the internet of things comprises a rain-proof mechanism, a pedal mechanism, a chair back, a base, wheels and a central control mechanism. The chair back is installed at one side of the base. The wheels are installed below the base. The pedal mechanism is installed below the base. The top of the chair back is provided with the rain-proof mechanism. The rain-proof mechanism and the pedal mechanism are electrically connected with the central control mechanism. The rain-proof mechanism comprises a second motor, a third transmission rod, two guiding components and a rain shelter. The pedal mechanism comprises a drive component and a support component. The intelligent wheelchair based on the internet of things is capable of folding and unfolding the rain-proof mechanism, realizing the rain-proof function of the wheelchair, reducing the hazard of the rainfall to the health of a user while the body of the user cannot be wetted by the rainfall in the open air, folding and unfolding the pedal mechanism by driving the support component through the drive component, and improving the practicability of the wheelchair because the pedal plate cannot hinder a patient while the patient seats down or stands up.

The invention relates to an interphone for security management of a community. The interphone comprises an antenna, rotary knobs, a loudspeaker, a button, a body, a fixing mechanism, and an extensionand retraction mechanism, wherein the fixing mechanism comprises a first driving assembly, a cylinder, a pipeline, a piston, a first transmission rod, a casing, a sucking disc and an air bag; and theextension and retraction mechanism comprises a limiting assembly, a second driving assembly, two first through holes, a base pipe, two first springs, and a first support rod. The interphone for the security management of the community has the advantages that through the fixing mechanism, a user can fix the interphone on a table when the interphone is not used, so that the phenomenon that the useraccidentally touches the interphone when doing office work at the table and the interphone therefore drops and is damaged is avoided, and unnecessary losses are further reduced; and moreover, antennaextension and retraction functions are achieved through the extension and retraction mechanism, so that the antenna can be prevented from being broken due to body movements of the user when the interphone is fixed on clothes of the user, and the practicality of the interphone is improved.

The invention discloses a fixed-wing unmanned aerial vehicle time domain aviation electromagnetic exploration system. A transmitting system, a receiving system and a recording and monitoring system are additionally arranged on an unmanned aerial vehicle flight platform. The transmitting system comprises a transmitter and a transmitting coil, and the transmitter is installed in the load cabin and used for converting direct current into bipolar combined wave pulse current; the transmitting coil is installed on the unmanned aerial vehicle nose, the unmanned aerial vehicle wings and the unmanned aerial vehicle pelvic fin structure in a closed shape and used for generating a primary electromagnetic field for measurement of the aviation electromagnetic system; the receiving system comprises a receiver nacelle and an electric winch, and the receiver nacelle is installed below the belly of the unmanned aerial vehicle through a receiver nacelle hanging frame and an automatic throwing device, islocated under the load cabin and is used for receiving a secondary electromagnetic field generated by induced eddy current from an underground conductor; the electric winch is mounted below the bellyof the unmanned aerial vehicle through an automatic throwing device, is positioned right ahead the receiver pod and is used for synchronous winding and unwinding and overload shearing of a three-component receiving coil in the receiver pod; and the recording monitoring system is arranged in the load cabin and is used for recording, storing and receiving the data acquired by the receiving system.

The invention relates to water purification equipment for water surface garbage treatment. The water purification equipment for water surface garbage treatment comprises a main body, a dirt collectingmechanism, a treatment mechanism and two supports. The dirt collecting mechanism comprises a first motor, a first roller, a conveying belt, a second roller, two lifting assemblies, two connecting rods, two first supporting rods and at least two dirt collecting plates. The treatment mechanism comprises a driving assembly, a dirt discharging assembly, a dirt storage pipe, a dirt entering hopper, apiston and a first transmission rod. Each lifting assembly comprises a winding reel, a connecting wire, a third motor and two hoisting rods. According to the water purification equipment for water surface garbage treatment, through the retracting and releasing function of the dirt collecting mechanism, the dirt collecting mechanism does not need to be soaked in water for a long time, the corrosionspeed of the dirt collecting mechanism is reduced, and the service life of the dirt collecting mechanism is prolonged. Garbage is compressed through the treatment mechanism, the amount of garbage contained in the water purification equipment is improved, the course reversal time of the water purification equipment is prolonged, and therefore the purification efficiency of the water purification equipment is improved.

The invention discloses a vehicle-mounted head-up display combined mirror holding and releasing component with locking and anti-collision functions. The holding and releasing component comprises a mounting support base, a rotating arm, a combined mirror, a pre-positioning mechanism, and the like, wherein a locking mechanism comprises a handle, a handle shaft, a handle sleeve, a compression spring,and the like. When a vehicle-mounted head-up display operates, the rotating arm and the combined mirror are in use positions, and the locking mechanism is in a locked state; when the vehicle-mountedhead-up display stops operating, the locking mechanism can be unlocked, the rotating arm and the combined mirror can be folded up to folding positions, and the locking mechanism is locked at the sametime, so that the space occupied by the holding and releasing component in a driving cab can be effectively reduced, the vision of a driver is less shielded, and the man-machine efficiency can be improved; in case of high-speed brake and other emergent situations, the driver can tilt forwards by taking a sitting point as a fulcrum, the combined mirror and the rotating arm can be thrown forwards automatically to corresponding positions, a channel can be available, and then the driver can be prevented from injury.

The invention relates to an air purifier based on the Internet of Things and with a wider purification range. The air purifier comprises a housing, a base, air inlets, an air outlet, a guide mechanism, a central control mechanism and movement mechanisms, wherein each movement mechanism comprises a drive assembly, a first support rod, a second support rod which is horizontally arranged, a third support rod, a first transmission rod, a second transmission rod, a third transmission rod and a movement wheel; and the guide mechanism comprises a support frame, a second connection rod, a first limit block, a fourth transmission rod, a second limit block, a second motor, a drive wheel and a plurality of air guide plates. In the air purifier based on the Internet of Things and with the wider purification range, an air direction of the air outlet is changed through the guide mechanism, so that a range of air circulation is expanded, and then a range of air purification is expanded, and a purification effect is improved; and contraction and release of the guide wheel are realized through the movement mechanism, movement of the air purifier is facilitated, the possibility of rollover caused by slide of the air purifier due to instable placement is lowered, and the occurrence of risk is avoided.

The invention relates to an interphone for security management of a community. The interphone comprises an antenna, rotary knobs, a loudspeaker, a button, a body, a fixing mechanism, and an extensionand retraction mechanism, wherein the fixing mechanism comprises a first driving assembly, a cylinder, a pipeline, a piston, a first transmission rod, a casing, a sucking disc and an air bag; and theextension and retraction mechanism comprises a limiting assembly, a second driving assembly, two first through holes, a base pipe, two first springs, and a first support rod. The interphone for the security management of the community has the advantages that through the fixing mechanism, a user can fix the interphone on a table when the interphone is not used, so that the phenomenon that the useraccidentally touches the interphone when doing office work at the table and the interphone therefore drops and is damaged is avoided, and unnecessary losses are further reduced; and moreover, antennaextension and retraction functions are achieved through the extension and retraction mechanism, so that the antenna can be prevented from being broken due to body movements of the user when the interphone is fixed on clothes of the user, and the practicality of the interphone is improved.

The invention relates to a test tube placing rack for a hospital clinical laboratory, which belongs to the technical field of medical instruments and comprises a bottom frame, a first tray and a second tray. A placing cavity is formed in the inner side of the bottom frame, an opening is formed in the upper side of the placing cavity, and an outer cover covers the opening; lifting assemblies are arranged at the two ends, in the length direction, of the inner side of the containing cavity, the lifting ends of the two lifting assemblies are connected with a supporting frame, and the first tray and the second tray are detachably connected with the supporting frame and the bottom frame. The first tray is provided with a first placing hole, and the second tray is provided with a second placing hole. By adopting the technical scheme, the function of placing test tubes can be realized, meanwhile, the occupied area of the test tube rack can be reduced to a certain extent, and the test tube rack is convenient to carry.

The invention discloses a vehicle-mounted head-up display combined mirror holding and releasing component with locking and anti-collision functions. The holding and releasing component comprises a mounting support base, a rotating arm, a combined mirror, a pre-positioning mechanism, and the like, wherein a locking mechanism comprises a handle, a handle shaft, a handle sleeve, a compression spring,and the like. When a vehicle-mounted head-up display operates, the rotating arm and the combined mirror are in use positions, and the locking mechanism is in a locked state; when the vehicle-mountedhead-up display stops operating, the locking mechanism can be unlocked, the rotating arm and the combined mirror can be folded up to folding positions, and the locking mechanism is locked at the sametime, so that the space occupied by the holding and releasing component in a driving cab can be effectively reduced, the vision of a driver is less shielded, and the man-machine efficiency can be improved; in case of high-speed brake and other emergent situations, the driver can tilt forwards by taking a sitting point as a fulcrum, the combined mirror and the rotating arm can be thrown forwards automatically to corresponding positions, a channel can be available, and then the driver can be prevented from injury.

The invention relates to the technical field of electric supports, and particularly discloses a single-drive dual-support bracket and a self-balancing system comprising the single-drive dual-support bracket. The single-drive dual-support bracket includes a motor, two support legs, two groups of bevel gear mechanisms, a spur gear mechanism and a transmission shaft; the motor and the spur gear mechanism are fixed together; the spur gear mechanism is fixed to the transmission shaft; when the motor rotates, the spur gear mechanism drives the transmission shaft to rotate; the two groups of bevel gear mechanisms include the first group of bevel gear mechanism and the second group of bevel gear mechanism; the two ends of the transmission shaft are connected with the first group of bevel gear mechanism and the second group of bevel gear mechanism respectively; the output end of the first group of bevel gear mechanism and the output end of the second group of bevel gear mechanism are connectedwith the two support legs respectively; when the transmission shaft rotates, the two support legs are driven to move simultaneously in the same direction through the two groups of bevel gear mechanisms. By only using one motor, the storing and placing functions of the bracket can be achieved, control is simplified, and the cost is reduced.

The invention discloses a visual detection assembly line for a paper product bearing object. The line comprises a main body, storage cavities, stretchable table frames, a driving motor and a stretchable cavity, the two sides of the bottom of the main body are both provided with the storage cavities, storage cover plates are hinged to the inner side walls of the storage cavities, the parts, above the storage cavities, of the side wall of the main body are fixedly provided with the stretchable table frames, workbench boards are hinged to the inner side walls of the stretchable table frames, roller shafts are hinged to the side walls of the top of the main body, a conveying belt is arranged between every two adjacent roller shafts in a winding mode, the driving motor is fixed at the position,on one sides of the roller shafts, of the surface of the main body, a rotating shaft is installed at the output end of the driving motor through a coupler, a fine adjusting mechanism is arranged on the inner wall of the top end of the main body, and a lamp holder is fixed at the bottom end of the fine adjusting mechanism. According to the line, not only the visual detection effect of the assemblyline improved, but also the speed regulation function during conveying of a assembly line paper carrier is realized, and the occupied space of the assembly line is reduced.

The invention belongs to dilators and particularly relates to a cervical dilator. The cervical dilator comprises a dilating head, a dilating frame, an inner core, a connecting rod and bilateral side handles which are sequentially connected mutually; the rear end of the dilating head is connected with the dilating frame; the dilating head and the dilating frame are in circular hollow structures; the dilating frame comprises an upper portion fan-shaped side, a lower portion fan-shaped side and symmetrical dilating sheets on bilateral sides. According to the cervical dilator, the dilating effect is good, the utilization method which is similar to that of original pliers and scissors is convenient, a cervix uteri is externally opened through the dilating sheets, collecting and releasing functions of opening are achieved according to the principle of a fan-shaped shed-shaped support and in combination with matching of the inner core and the dilating frame through flexible hinged supporting points installed at support joints, cervical damage caused by normal dilation is avoided.

The invention discloses a portable charger, and relates to power equipment, which solves the problems that a charging wire in an existing charger is not easy to store and inconvenient to carry. According to the specific design thought of the invention, the overturning and the folding of the portable charger can be realized through an adapter and a winding box which are hinged through a connectingrod. The portable charger is convenient to fold, unfold and carry about. A first magnetic block and a second magnetic block attract each other to realize the fixation purpose when the adapter and thewinding box are folded. When the charging is needed, the adapter is switched on rotationally. In this way, the first magnetic block and the second magnetic block are separated. Meanwhile, the adapterand the winding box are kept on the same horizontal plane. At the moment, the adapter abuts against the winding box by means of embedded blocks, wherein a male block is inserted into a female block torealize the electric connection. A rotating wheel is rotated to drive a rotating shaft to rotate so as to drive a wire roller to rotate, so that a charging wire wound on the surface of the wire roller is wound up or unwound. As a result, the charging wire is stored. The rotating wheel is fixed through a locking device, and the charging wire is prevented from being automatically loosened under theaction of the external force or gravity in the charging or carrying process.

The invention discloses a working platform in a nickel ingot vacuum induction smelting furnace chamber. The working platform comprises a furnace body, a workbench, a protective chamber, a hidden chamber and depth adjusting structures, wherein the workbench is arranged in the furnace body, the protective chamber is formed in the edge of the top of the workbench, the hidden chamber is formed in oneside of the workbench, sliding frames are fixed to the two ends of the inner side wall of the hidden chamber respectively, one end of a bearing plate extends to the exterior of the hidden chamber, inclination adjusting discs are fixed to the two ends of the workbench respectively, supporting seats are arranged at the sides, away from the workbench, of the inclination adjusting discs respectively,U-shaped hooks are detachably connected to the positions, above the supporting seats, of the side wall of the furnace body respectively, and the depth adjusting structures are arranged on the portions, between the U-shaped hooks and the supporting seats, of the side wall of the furnace body. According to the working platform, the function of freely adjusting the inclination of the working platformis achieved, the convenience of the working platform in use is improved, the use area of the working platform is increased, and the phenomenon of article falling in the using process of the working platform is avoided.

The invention provides a highway bridge bearing capacity detection device for traffic construction. The highway bridge bearing capacity detection device for traffic construction comprises: a first box body; two fixing blocks which are fixedly mounted on the outer walls of the two sides of the first box body correspondingly; a first sliding rod which is fixedly mounted in the first box body; a toothed plate which is mounted on the first sliding rod in a sliding manner; a motor which is arranged in the first box body; a gear which is fixedly installed on an output shaft of the motor, wherein the gear is meshed with the toothed plate; and a box body which is fixedly mounted at the bottom of the first box body. The highway bridge bearing capacity detection device for traffic construction provided by the invention has the advantages that the load sensor is convenient to fix and take, the stability is good, the detection precision is high, the data connecting line can be accommodated, and the influence of the data connecting line on the detection precision is solved.

The invention relates to the technical field of ships, and discloses a design method of a rope ladder at a bulwark and a ship. The design method of the rope ladder at the bulwark is used for installing a rope ladder of a ship to a ship body of the ship, the ship body is provided with a deck, the deck is provided with a bulwark. The design method comprises the following steps that S1, a fixing piece is arranged on the bulwark, and the fixing piece and an inclined ladder on the bulwark are arranged in a separated mode; and S2, one end of the rope ladder is detachably connected to the fixing piece, and the rope ladder is thrown into the sea in a throwing mode, so that the other end of the rope ladder is turned and falls to the sea level. The ship has the beneficial effects that the connecting points between the rope ladder and the ship body are arranged on the bulwark, so that the rope ladder can directly fall to the sea level from the bulwark; meanwhile, due to the fact that the problem of interference between the inclined ladder and the rope ladder does not occur in the process of pulling the inclined ladder or using the inclined ladder, the retracting and releasing functions of the rope ladder and the passing function of the inclined ladder are achieved at the same time.

The invention relates to the technical field of lifting appliances, in particular to a balance lifting appliance device. The adopted technical scheme is as follows: the balance lifting appliance device comprises a sling tray for connecting hoisting equipment, wherein at least two groups of sling assemblies are arranged below the sling tray; the sling assemblies comprise connecting bodies connectedwith the sling tray, and the connecting bodies are rotatably connected with a mandrel; the mandrel is used for winding flexible slings, and one end of the mandrel is connected with a torque sensor; and the connecting bodies are also provided with stopping mechanisms, and the stopping mechanisms are used for controlling the rotation of the mandrel. A single rigging has the advantages that the length is adjustable and the stress state is controllable, the scene adaptability and the hoisting safety of the lifting appliance can be greatly improved, the configuration specification and the number of lifting appliances in different application occasions can be reduced, and the guarantee condition of hoisting work is reduced.

The invention relates to an intelligent wheelchair based on internet of things. The intelligent wheelchair based on the internet of things comprises a rain-proof mechanism, a pedal mechanism, a chair back, a base, wheels and a central control mechanism. The chair back is installed at one side of the base. The wheels are installed below the base. The pedal mechanism is installed below the base. The top of the chair back is provided with the rain-proof mechanism. The rain-proof mechanism and the pedal mechanism are electrically connected with the central control mechanism. The rain-proof mechanism comprises a second motor, a third transmission rod, two guiding components and a rain shelter. The pedal mechanism comprises a drive component and a support component. The intelligent wheelchair based on the internet of things is capable of folding and unfolding the rain-proof mechanism, realizing the rain-proof function of the wheelchair, reducing the hazard of the rainfall to the health of a user while the body of the user cannot be wetted by the rainfall in the open air, folding and unfolding the pedal mechanism by driving the support component through the drive component, and improving the practicability of the wheelchair because the pedal plate cannot hinder a patient while the patient seats down or stands up.

The invention discloses an intelligent indicator device for truck storage, the structure of which comprises a front protective plate, a contact plate, a support base plate, a gravity sensor, a display screen, a connecting plate, a support base, a lifting transmission device, a splint, a baffle plate, and a rear protective plate , bolts, loudspeakers, support shaft wheels, inspection ports, the bottom of the front protective plate is welded to the upper surface of the contact plate, the front protective plate is connected to the rear protective plate through bolts, the lower surface of the contact plate is connected to the upper surface of the splint According to the present invention, an intelligent indicator device for truck storage realizes the control of the chain transmission device by controlling the brake device and the brake wheel device, and then controls the lifting of the lifting mechanism, and finally allows the driver to reach directly through the lifting transmission device. The parking floor greatly reduces the time for placing trucks, which will not cause the warehouse to be blocked, and improves the speed of placing trucks in the warehouse and the work efficiency of warehouse personnel.

The invention discloses a condenser intelligent moving and cleaning robot, which can be used in the field of large scale cleaning equipment and comprises a track running mechanism, a cleaning mechanism, and an electric control mechanism. A spray gun is connected on a spray gun running rest of a cleaning arm. The spray gun is provided with a underwater TV camera and connected with a cleaning mediasource by a communicating tube. The cleaning arm is connected with a cleaning arm running bracket component by a drive shaft. The drive shaft of the cleaning arm is connected with an electric push rod. The cleaning arm running bracket component is arranged on a pivoting support which is arranged on the track running mechanism by the running bracket component. The right front end of the top of thespray gun, the front end and the back end of a mounting plate of the pivoting support and the front position and the back position of a track support are provided with sonar sensors. The robot has few joints, simple structure, convenient processing and assembling, can automatically move in a water chamber of the condenser to finish the precise position and efficient cleaning of copper pipes of the condenser, has wide application range and high degree of automation.

The invention discloses a portable Ku.c.s waveband satellite ground transceiver, including: Ku.c.s multiuse high frequency head, Ku.c.s multiuse receiver, Ku.c.s multiuse transmitter, LCD and high energy lithium battery pack containing solar energy charging plate; and its characteristic: there is a swelling body connected and fixed in top and bottom box bodies hinged of the transceiver, after released, the right side of the swelling body is a paraboloid; there is a conductive metal layer convered on the right side of the swelling body, there is a feed source bracket fixed base in the center of the metal layer, the outer end of the feed source bracket fixes the feed source and the inner end of the feed source is actively connected with the fixed base through rotating shaft. It combines swelling body, extension feed source bracket and box body to realize the receiving and transmitting function of paraboloid antenna, solving the problem of carrying and moving satellite transceiver and making the use of satellite ground transceiver wider and more convenient.

The invention provides an obstacle removing shovel device. The obstacle removing shovel device comprises a special-shaped obstacle removing shovel, an obstacle removing shovel support, a baffle, a power execution and control system, sliding blocks and guide rails. The obstacle removing shovel device can realize automatic retracting and stretching of the obstacle removing shovel. When obstacles need to be removed, the obstacle removing shovel device can control the special-shaped obstacle removing shovel to the appropriate height through the power execution and control system and remove the obstacles to the two sides of a obstacle removing vehicle body. When no obstacle exists, the obstacle removing shovel device can retract the obstacle removing shovel to be integrated with the appearanceof the vehicle body. The obstacle removing shovel device is ingenious and simple in structure, flexible and convenient to operate, high in obstacle removing efficiency and beautiful in appearance, hasthe characteristics of universality, serialization and combination and is high in practicality and diversified in function.

The invention relates to the technical field of electric supports, and specifically discloses a single-drive double-support bracket and a self-balancing system comprising the single-drive double-support bracket. The single-drive double-support bracket includes a motor, two legs, two sets of bevel gear mechanisms, spur gear mechanisms and transmission shafts; the motor and the spur gear mechanism are fixed together; the spur gear mechanism is fixed on the transmission shaft; when the motor rotates, through The spur gear mechanism drives the transmission shaft to rotate; the two sets of bevel gear mechanisms include the first set of bevel gear mechanisms and the second set of bevel gear mechanisms; the two ends of the drive shaft are respectively connected with the first set of bevel gear mechanisms and the second set of bevel gear mechanisms; The output end of the first set of bevel gear mechanism and the output end of the second set of bevel gear mechanism are respectively connected with the two legs; when the transmission shaft rotates, the two sets of bevel gear mechanisms drive the two legs to move simultaneously in the same direction. Only one motor can be used to realize the retractable function of the stand, which simplifies the control and reduces the cost.

The invention discloses an intelligent indicating device for trucks entering a storage. The device structurally comprises a front protective plate, a contact plate, a supporting bottom plate, a gravity sensor, a display screen, a connecting plate, a supporting base, a lifting transmission device, a clamping plate, a baffle, a rear protective plate, bolts, loudspeakers, a support shaft wheel, and an inspection port. The bottom end of the front protective plate is welded to the upper surface of the contact plate, the front protective plate is connected with the rear protective plate by the bolts, and the lower surface of the contact plate is attached to the upper surface of the clamping plate. According to the intelligent indicating device for trucks entering the storage, the control of a chain transmission device is realized by controlling a braking device and a brake wheel device, therefore the lifting and lowering of a lifting mechanism are controlled, finally a driver can directly reach a stop floor through the lifting transmission device, the time for placing a truck is greatly reduced, the storage cannot be jammed, and the speed of placing the trucks in the storage and the working efficiency of storage workers are improved.