43results about How to "Avoid the problem of not being able to open" patented technology

The invention discloses a refrigerator. The refrigerator comprises a refrigerator body, a door body used for opening and closing the refrigerator body and a hinge assembly connected with the refrigerator body and the door body; the refrigerator body comprises a containing cavity and an outer side face which is adjacent to the hinge assembly and located on an extending section of a rotating path ofthe door body, wherein the direction, facing the outer side face, of the containing cavity is a first direction; and when the door body is in an opening process, the hinge assembly drives the door body to move, in the first direction, away from the refrigerator body. According to the refrigerator, the hinge assembly can drive the door body to move, in the first direction, away from the refrigerator body, that is the door body moves in the direction away from the containing cavity, so that the opening degree of the refrigerator body can be guaranteed, and the problem that drawers, shelves andthe like in the refrigerator body cannot be opened due to interference of the door body is solved.

The invention discloses a slide damping type water hydraulic overflow valve for high-pressure and high-flow systems. The slide damping type water hydraulic overflow valve comprises a valve (1), a valve seat (2), a damping ring (3), a main valve spool (4), a damping spring (5), a damper (6), a damping valve plate (7), a spring push rod (8), an upper end cover (9), an adjusting screw (10) and a main spring (12). A water inlet (1-1), a water outlet (1-2) and an end cover mounting hole are formed in the valve (1), and circular steps are arranged at the inner bottom of the valve (1). The slide damping type water hydraulic overflow valve has the advantages that the main valve spool is subjected to differential pressure control and has extremely small movement hydraulic force effective action areas, the main spring is simple in design and manufacture under the condition of equivalent pressure and flow control, the main valve spool and the valve seat are sealed by flat plate valve structures, and accordingly the slide damping type water hydraulic overflow valve is applicable to the high-pressure and high-flow water hydraulic transmission and control systems.

The invention provides a panel display driving chip based on a silicon on insulator (SOI) material, which is composed of a high-voltage P-type transverse metal oxide transistor, a high-voltage N-type transverse metal oxide transistor, a high-voltage N-type transverse insulated gate bipolar transistor and a low-voltage device, wherein each high-voltage device is isolated by a double-groove structure filled with silicon dioxide, which starts from the oxygen buried layer and ends at the field oxide on the device surface via the N-type buried layer and the N-type epitaxial layer; and the connection region of the epitaxial layer and the oxygen buried layer is provided with the N-type buried layer. The preparation method comprises the following steps: making the oxygen buried layer, the N-type buried layer and the deposition epitaxial layer on the P-type substrate; making the high-voltage P wells of the high-voltage N-type transverse metal oxide transistor and the high-voltage N-type transverse insulated gate bipolar transistor, the P-type drift region of the high-voltage P-type transverse metal oxide transistor, the buffer layer of the high-voltage transistor, the low-voltage well of the low-voltage transistor, the source and drain regions and the contact holes; and evaporating aluminium, photoetching aluminium in a reversed mode, forming electrodes and metal field plates, and passivating.

The invention relates to a cabin door flight lock system for aircrafts. The system comprises a logical processing and controlling unit and a flight lock logical unit, wherein the logical processing and controlling unit generates first cabin door lock signals according to wheel load bus signals, airspeed bus signals and cabin door closing sensor signals; the flight lock logical unit generates second cabin door lock signals according to the first cabin door lock signals and wheel load hardwire signals so as to instruct a cabin door of an aircraft to be set as a locking state or an unlocking state. According to the cabin door flight lock system disclosed by the invention, the cabin door can be prevented from being opened due to misoperation in a flying process of the aircraft while meeting the requirements of normal opening and emergency evacuation of the cabin door; in the meantime, the single point failure can be avoided through the design of the control structure of the cabin door flight lock system, so that the airworthiness clause requirement can be fully met and the safety of the aircraft is guaranteed.

The invention provides a car door opening safety assisting device and method and belongs to the technical field of cars. The problems that operability of car door opening safety protection is too low and safety is not high in the prior art are solved. The car door opening safety assisting device comprises a car body controller, an ignition switch, a car speed sensor, a door lock switch, a door lock motor, a left radar sensor and a right radar sensor. The car speed sensor, the ignition switch, the left radar sensor, the right radar sensor and the door lock switch are connected with the input end of the car body controller. The door lock motor is connected with the output end of the car body controller. The method comprises the steps that A, whether a car is not stopped after being automatically locked or not is judged; B, whether objects approach to the rear portions of the left side and the right side of the car or not is judged; C, corresponding actions are conducted when the objects approach to the rear portions of the left side and the right side of the car; and D, corresponding actions are conducted when no object approaches to the rear portions of the left side and the right side of the car. The car door opening safety assisting device and method can improve the operability of car door opening safety protection and the safety when passengers open car doors and get off a car.

The invention relates to a pressing-opening-type car trailer hook cover. The pressing-opening-type car trailer hook cover is different in that the pressing-and-opening-type car trailer hook cover includes a trailer hook cover body and a connecting hole matched with the trailer hook cover body and formed in a bumper, the trailer hook cover body includes a cover plate body, and the cover plate bodyis provided with a first side, a second side, a third side and a fourth side, wherein the first side and the second side are arranged oppositely, and the third side and the fourth side are arranged oppositely; the first side of the cover plate body is provided with a hook, the second side is provided with a clamping buckle, the third side and the fourth side are symmetrically provided with rotating shafts, and the rotating shafts are arranged towards the clamping buckle; the connecting hole is provided with a hole wall extending towards the interior of the bumper, a supporting table used for supporting the cover plate body is formed at the tail end of the hole wall of the connecting hole, a rotating groove matched with the rotating shafts and a clamping connecting groove matched with the clamping buckle are formed in the supporting table, a limiting hole matched with the hook is formed in the hole wall of the connecting hole, and the supporting table from the rotating groove to the limiting hole side is provided with a first supporting surface extending downwards obliquely. The pressing-opening-type car trailer hook cover is simple in structure, reliable in connection and easy to assemble and open.

The invention discloses a finger recognition method of a reflectance oximetry, and belongs to the field of medical instruments. The finger recognition method mainly comprises the following steps: I, converting an optical signal received by a receiving sensor when the optical signal is transmitted by a transmitting sensor into a frequency signal, then comparing with a preset light intensity threshold value, and judging whether the light environment is a weak light environment or a strong light environment; II, analyzing a frequency signal formed by the light signal received by the receiving sensor at the time of double pulse square wave high level and a frequency signal formed by the light signal received by the receiving sensor at the time of double pulse square wave low level according to a result obtained by the step I to judge whether a finger exists; III, determining whether the reflectance oximetry is started. According to the method, the reflectance oximetry can be accurately, reliably and automatically opened, the design is simpler, the circuit is easier and more convenient, and the service life of the oximetry can be prolonged.

The invention discloses a train door opening and closing circuit and train door control system of a train set. The train door opening and closing circuit comprises a self-resetting door opening button, a self-resetting door closing button and a door releasing module. The door releasing module controls a door releasing instruction line to be converted from a low-level state to a high-level state and kept in the high-level state before a train door is opened every time, and autonomously controls the door releasing instruction line to be converted from the high-level state to the low-level stateafter the train door is closed every time, that is, the door releasing module can autonomously restore the low-level state of the door releasing instruction line, thus after the train door is closed,normal conducting of train opening operation of the next time can be ensured without executing corresponding restoring operation by a driver, manual operation steps of door opening and closing of thetrain set are omitted, the problem that the low-level state of the door releasing instruction line is not restored in time, and consequently the train door cannot be opened after end switching drivingis avoided, and then driving safety and the driving order are ensured.

A metering pump liquid release control device of a post-processing system for internal combustion engine tail gas purification comprises a metering pump shell, a metering pump cylinder body and a piston arranged in the cylinder body, and a pushing stick, a liquid release valve supporting stick, a liquid release valve and a cleaning stick are sequentially arranged above the piston. A piston operation stop point baffle block is arranged in the metering pump cylinder body; a hollow sliding block and a hollow outer liquid cavity body are arranged at the position, above the piston operation stop point baffle block, in the metering pump cylinder body; a metering cavity is formed by a cylinder body space between the upper portion of the piston and the sliding block, and a temporary liquid storage cavity is formed by a space between the sliding block and the lower portion of the liquid release valve. According to the device, the influences of external spray-assisted air pressure can be greatly reduced, and the metering precision of the metering pump can be kept within the large spray-assisted air pressure range. Meanwhile, due to the design of double liquid-outlet cavities and action of the pushing stick and the cleaning stick, the metering pump is not damaged by urea crystallization, or, the normal work of the metering pump is not affected by the urea crystallization, and the practicability of the metering pump is greatly improved.

The invention relates to a cabin door flight lock system for aircrafts. The system comprises a logical processing and controlling unit and a flight lock logical unit, wherein the logical processing and controlling unit generates first cabin door lock signals according to wheel load bus signals, airspeed bus signals and cabin door closing sensor signals; the flight lock logical unit generates second cabin door lock signals according to the first cabin door lock signals and wheel load hardwire signals so as to instruct a cabin door of an aircraft to be set as a locking state or an unlocking state. According to the cabin door flight lock system disclosed by the invention, the cabin door can be prevented from being opened due to misoperation in a flying process of the aircraft while meeting the requirements of normal opening and emergency evacuation of the cabin door; in the meantime, the single point failure can be avoided through the design of the control structure of the cabin door flight lock system, so that the airworthiness clause requirement can be fully met and the safety of the aircraft is guaranteed.

The invention discloses an intelligent transformer explosion-proof protection device. The device comprises a shell and a transformer body mounted in the shell; the interior of the shell is divided into a gas storage cavity and a containing cavity through a set of vertically-arranged partition plates; a gas storage tank, a controller and a storage battery are mounted in the gas storage cavity; thecontroller and the storage battery are both installed on the side wall of the gas storage cavity; the controller is arranged below the storage battery and is electrically connected with the storage battery; the gas storage tank is fixedly connected with the inner wall of the gas storage cavity through supporting rods arranged on two sides; gas outlet pipes communicating with the gas storage tank are installed at the upper end and the lower end of the gas storage tank correspondingly; a top plate and a bottom plate are installed on the upper side wall and the lower side wall in the containing cavity correspondingly; and the transformer body is placed on the bottom plate. According to the intelligent transformer explosion-proof protection device, rapid air-blowing fire extinguishing is achieved when a transformer breaks down and spontaneously combusts, and an explosion problem caused by continuous combustion is prevented. The protection device is suitable for clamping transformer bodiesof different sizes.

The invention relates to an expressway guardrail. The expressway guardrail comprises a cross bar, supporting columns and fixing seats. The end of the cross bar is warped up. Each supporting column comprises a pair of supporting rods arranged in parallel, the upper ends of the supporting rods are connected with the cross bar through connecting balls and spherical groove structures which are matched, and the lower ends of the supporting rods are connected with the corresponding fixing seat through connecting balls and spherical groove structures which are matched. The supporting rods are made ofa permanent magnet material, and every two supporting rods in a pair are repulsive in magnetism. Containing grooves are formed in the opposite rod faces of every two corresponding supporting rods, and buffer safety bags are placed in the containing grooves and folded to be placed in the containing grooves in a folding fan shape. A pre-breaking groove is formed in the horizontal center line of each supporting rod. The expressway guardrail can effectively reduce the probability that a vehicle flies out or flies to an opposite road when an accident happens, effectively reduce the degree of influence on traffic by the accident and meanwhile effectively reduce the collision damage degree of the accident vehicle.

The invention provides a water hydraulic axial plunger pump provided with a pressure-limiting and overflow device. The pump comprises a back end cover (1), a valve plate (2), a rotating cylinder assembly (3), a casing (4), a sliding bearing (5), an odd number of plunger and slipper assemblies (6), a return plate (7), a swash plate (8), a mechanical seal (9), a front end cover (10), a shaft (11) and the pressure-limiting and overflow device mounted on the back end cover. By the aid of the pressure-limiting and overflow device mounted on the back end cover, pressure-limiting and overflow functions of a water hydraulic axial plunger pump body are realized; the pressure-limiting and overflow device adopts the mechanical and hydraulic double-damping design, obvious defects of large working vibration, large noise, low pressure adjusting precision, poor working stability and the like of general water hydraulic overflow valves are effectively overcome, and the working stability of a system is improved; meanwhile, the problem that a main valve core cannot be opened due to the fact that a damping hole of a fixedly mounted damper is blocked due to medium pollution and local high pressure is formed in a damping cavity is effectively solved.

The invention provides a water hydraulic axial plunger pump with a pressure limiting overflow device and an unloading device. The water hydraulic axial plunger pump comprises a rear end cover (1), a valve plate (2), a rotary cylinder body assembly (3), a shell (4), a sliding bearing (5), an odd number of plunger sliding shoe assemblies (6), a return stroke plate (7), a swash plate (8), a mechanical seal (9), a front end cover (10), a shaft (11), the pressure limiting overflow device and the unloading device. A pump body is provided with the pressure limiting overflow device and the unloading device and applied to a water hydraulic transmission and control system; and compared with the design that a pipeline and a control valve are added to a pump with the same function, the system is simple, the integration level is high, pipeline design is simple, and manufacturing cost is low. The double-damping design adopting machinery and fluid power is adopted by the pressure limiting overflow device, so that the prominent problems of the pressure limiting overflow device in the aspects of working vibration, noise, pressure adjustment precision, stability, anti-pollution capacity and the like are solved effectively.

The invention discloses a fully-embedded refrigerator capable of increasing opening degree of a refrigerator body. A hinge assembly comprises a first hinge piece, a second hinge piece, a first switching piece and a second switching piece, when a door body is opened to a first opening angle, the first switching piece, the second switching piece and the second hinge piece move together relative to the first hinge piece, and the door body rotates in situ relative to the refrigerator body. When the door body continues to be opened to a third opening angle, the first switching piece and the first hinge piece are static relatively, the second switching piece and the second hinge piece move relative to the first switching piece together, the door body moves towards a containing cavity from a pivot side, the door body moves towards the pivot side from the containing cavity, and when the door body continues to be opened to the maximum opening angle. The first hinge piece, the first switching piece and the second switching piece are relatively static, the second hinge piece moves relative to the second switching piece, and the door body continues to rotate in situ relative to the refrigerator body. According to the fully-embedded refrigerator capable of increasing the opening degree of the refrigerator body, a rotating shaft can be switched in the opening process of the door body, so that the refrigerator can adapt to embedded application scenes, and the opening degree of the refrigerator body can be guaranteed.

The invention discloses an intelligent lock system integrated with safety alarm. The system comprises an electronic lock and a plurality of detectors, wherein the electronic lock comprises a lock cylinder, a motor, a control circuit and a power supply, wherein the control circuit comprises a lock microprocessor, a network communication module, an unlocking / locking control module and an identity verification module; and the network communication module comprises a WIFI transceiver module and a 433MHz radio frequency receiving module. The detector conducts detection and sends an alarm signal, and the 433MHz radio frequency receiving module receives the alarm signal, processes the alarm signal into data through the network communication module and sends the data to the lock microprocessor. The WIFI transceiver module is connected to a server through the Ethernet to remotely inform a user of APP confirmation; when the user APP is overtime and does not process, a preset strategy is automatically executed, and the lock microprocessor sends an instruction to the unlocking / locking control module to control the motor to execute unlocking operation, so that automatic unlocking of the electronic lock is realized, and the problem that the electronic lock cannot be unlocked due to damage in an accident is avoided.

A metering pump liquid release control device for a post-treatment system for exhaust gas purification of an internal combustion engine, comprising a metering pump housing, a metering pump cylinder and a piston disposed in the cylinder; a push rod and a liquid release valve support rod are sequentially arranged above the piston , a liquid release valve and a cleaning rod; the cylinder body of the metering pump is provided with a piston running dead stop; the metering pump cylinder above the piston running dead stop is provided with a hollow slider and a hollow outer liquid Cavity body; the cylinder space between the upper part of the piston and the slider constitutes a metering chamber; the space between the slider and the lower part of the liquid release valve constitutes a temporary liquid storage chamber. The invention can greatly reduce the influence of external spraying-assisting air pressure, and can maintain the metering accuracy of the metering pump within a relatively large range of spraying-assisting air pressure. At the same time, due to the design of double outlet chambers and the functions of the push rod and the cleaning rod, the metering pump will not be damaged or affect normal operation due to urea crystallization, which greatly increases the practicability of the metering pump.

The invention discloses a slide damping type water hydraulic overflow valve for high-pressure and high-flow systems. The slide damping type water hydraulic overflow valve comprises a valve (1), a valve seat (2), a damping ring (3), a main valve spool (4), a damping spring (5), a damper (6), a damping valve plate (7), a spring push rod (8), an upper end cover (9), an adjusting screw (10) and a main spring (12). A water inlet (1-1), a water outlet (1-2) and an end cover mounting hole are formed in the valve (1), and circular steps are arranged at the inner bottom of the valve (1). The slide damping type water hydraulic overflow valve has the advantages that the main valve spool is subjected to differential pressure control and has extremely small movement hydraulic force effective action areas, the main spring is simple in design and manufacture under the condition of equivalent pressure and flow control, the main valve spool and the valve seat are sealed by flat plate valve structures, and accordingly the slide damping type water hydraulic overflow valve is applicable to the high-pressure and high-flow water hydraulic transmission and control systems.

The invention relates to an anti-carbon and viscosity method and a mechanism of an electric EGR (exhaust gas recirculation) valve. When an engine is shut down, a valve clack of the electric EGR valve is prevented from making contact with a valve seat, so that the valve clack is prevented from sticking to the valve seat after cooling. The invention provides a method for separating the valve seat from the valve clack when the engine is shut down, so that the valve clack of the electric EGR valve is prevented from sticking to the valve seat when the engine is shut down. The valve seat is separated from the valve clack, so that the valve seat cannot stick to the valve clack when the engine is shut down for a long time, and the problem of damage to the electric EGR valve due to the viscosity of the valve clack and the valve seat when the engine is shut down for a long time is solved. Additionally, the invention provides a device for realizing the method: a solenoid coil is arranged in the electric EGR valve so as to control a bolt, so that that the valve clack is limited to close when the engine is shut down, a certain gap is formed between the valve clack and the valve seat of the electric EGR valve when the engine is not operated, the viscosity of the valve clack and the valve seat due to carbon deposition is prevented, and the problem that the EGR valve cannot be opened is avoided.

The invention discloses a rolling sagger and a powder sintering method, and relates to the technical field of high-temperature sintering kilns. The rolling sagger comprises a sagger main body, the sagger main body is a hollow cylinder forming an inner cavity in a surrounding mode and is provided with at least one rotation axis, the two ends of the sagger main body are detachably connected with fixed cover plates, the fixed cover plates are provided with through exhaust holes, and the exhaust holes are communicated with the inner cavity of the sagger main body; a fixed shaft and a movable cover plate are arranged on the outer side of the fixed cover, the movable cover plate is in close fit with the outer side of the fixed cover plate and enables part of the exhaust holes to be in a blocked state, a notch is formed in the movable cover plate, the notch corresponds to at least one exhaust hole and enables the exhaust hole to be in a communicated state, and the movable cover plate can rotate around the fixed shaft. According to the rolling sagger and the powder sintering method, when the rolling sagger rolls in the tunnel kiln, waste gas can be discharged while powder is reserved.

The invention provides a panel display driving chip based on a silicon on insulator (SOI) material, which is composed of a high-voltage P-type transverse metal oxide transistor, a high-voltage N-type transverse metal oxide transistor, a high-voltage N-type transverse insulated gate bipolar transistor and a low-voltage device, wherein each high-voltage device is isolated by a double-groove structure filled with silicon dioxide, which starts from the oxygen buried layer and ends at the field oxide on the device surface via the N-type buried layer and the N-type epitaxial layer; and the connection region of the epitaxial layer and the oxygen buried layer is provided with the N-type buried layer. The preparation method comprises the following steps: making the oxygen buried layer, the N-type buried layer and the deposition epitaxial layer on the P-type substrate; making the high-voltage P wells of the high-voltage N-type transverse metal oxide transistor and the high-voltage N-type transverse insulated gate bipolar transistor, the P-type drift region of the high-voltage P-type transverse metal oxide transistor, the buffer layer of the high-voltage transistor, the low-voltage well of the low-voltage transistor, the source and drain regions and the contact holes; and evaporating aluminium, photoetching aluminium in a reversed mode, forming electrodes and metal field plates, and passivating.

The invention discloses gynecological appliance disinfection equipment, and the disinfection equipment structurally comprises a disinfection cabinet body, a cabinet door, an electric control panel, a door holder, a disinfection bin, a base and an operation bin; the cabinet door is movably arranged on the front side of the disinfection cabinet body through the door holder, the electric control panel is arranged above the front end of the disinfection cabinet body, the disinfection bin is arranged in the disinfection cabinet body, and the base is arranged below the disinfection bin; the operation bin is arranged on the upper portion of the interior of the disinfection cabinet body, the electric control panel is tightly connected with the interior of the operation bin through a circuit, and the disinfection bin is provided with an ozone recovery device and a pressure value balancing device. By arranging the ozone recovery device, air containing ozone in the disinfection equipment is pumped out, and ozone is separated and then put into the disinfection equipment to be recycled; untreated air mixed with ozone is prevented from diffusing into the external environment to cause damage to the body of medical staff; the rotary door opening device is arranged, so that the problem that the disinfection equipment cannot be opened due to too low air pressure caused by ozone extraction is avoided, and the ozone recovery device is more perfect.

The invention discloses a water cup capable of preventing a cup cover from being fastened, belongs to catering utensils and mainly solves the problem that when hot water is stored in a traditional water cup, the cup cover is difficult to open. The water cup comprises a cup body, a cup cover and a cup bottom, the cup cover and the cup body are in a threaded connection, a silica gel pad is arranged at the bottom of the cup body, the cup bottom is in the threaded connection with the silica gel pad, and a through hole is arranged on the end surface of the cup bottom. The water cup capable of preventing the cup cover from being fastened has the advantages that by means of the silica gel pad deformation, the relative balance between the pressure of the cup body and the pressure outside the cup body is achieved, thereby the problem that the cup cover can not be opened caused by the pressure difference between the interior and exterior of the cup body is solved, and the usage is convenient.

The invention discloses a translation type automatic door and relates to the field of automatic doors. The translation type automatic door comprises a storage frame, a cross beam is arranged at the top of the storage frame, a servo motor is installed on one side of the interior of the cross beam, the output end of the servo motor is connected with a two-way lead screw, the outer surface of the two-way lead screw is sleeved with two sliding sleeves, and tooth blocks are arranged on the lower portions of the interiors of the sliding sleeves. When a circuit is damaged and the servo motor cannot work due to accidents, a worker stretches a hand into a groove indoors to pull a pull handle, a movable block overcomes the elasticity of a spring to move downwards, the sliding sleeves move downwards, the tooth blocks do not mesh with the two-way lead screw, and the worker can manually push a translation door, so as to open the translation door, so that the problem that the translation door cannot be opened after the circuit is damaged in emergency is avoided, the safety is high in the using process, and the whole device is simple in structure and easy to operate.

The invention discloses a train door opening and closing circuit and train door control system of a train set. The train door opening and closing circuit comprises a self-resetting door opening button, a self-resetting door closing button and a door releasing module. The door releasing module controls a door releasing instruction line to be converted from a low-level state to a high-level state and kept in the high-level state before a train door is opened every time, and autonomously controls the door releasing instruction line to be converted from the high-level state to the low-level stateafter the train door is closed every time, that is, the door releasing module can autonomously restore the low-level state of the door releasing instruction line, thus after the train door is closed,normal conducting of train opening operation of the next time can be ensured without executing corresponding restoring operation by a driver, manual operation steps of door opening and closing of thetrain set are omitted, the problem that the low-level state of the door releasing instruction line is not restored in time, and consequently the train door cannot be opened after end switching drivingis avoided, and then driving safety and the driving order are ensured.

The invention relates to a touch screen type one key starting system for motor vehicles and new energy vehicles. The touch screen type one key starting system comprises an airtight pressed touch screen assembly, a control device used for controlling electric motor working condition, a power source used for supplying electric power to the an electric motor, a switch chip used for controlling power source working condition, a Hall sensor used for detecting the electric motor working condition and a remote controller used for conducting wireless communication with the control device, wherein the switch chip has a screen lock control function; an I / O terminal of the control device is respectively and electrically connected with a touch screen, the switch chip and the Hall sensor; the switch chip or the control device is provided with a wireless communication module which exchanges data with the remote controller. Motor vehicle starting technologies are realized via adoption of touch screen technologies, and safe motor vehicle starting control and sensitive motor vehicle operation can be achieved; a problem that vehicles cannot be started due to dampness or sleety weather when a traditional key starting mode or a traditional press key starting mode is adopted can be prevented; the touch screen type one key starting system is advantaged by simple structure, convenience of installation and utilization, long service life, high antitheft performance and the like.

The invention discloses a carriage protection awning device with folding and unfolding functions for automobile freight. The carriage protection awning device comprises a installation rail, a front-end moving block and a middle moving block. The device has the beneficial effects that the front-end moving block, a driving motor, a driving wheel and a photovoltaic panel are adopted. When a tarpaulin is opened, the driving motor drives the driving wheels to move in the installation rails. Therefore, the front-end moving block is driven to move towards the rear portion of the compartment, the tarpaulin is driven to move, and the tarpaulin moves to drive the moving wheel of the middle moving block to roll; Thus, the tarpaulin between the middle moving block is driven to open in turn, so as to fully open the tarpaulina. The driving motor supplies power through electric energy which is generated by a photovoltaic panel and stored in a storage battery, the trouble of pulling an electric wire and refitting a circuit is omitted, installation and use are more convenient, the tarpaulin is opened in the mode that the driving motor drives a driving wheel to rotate. The trouble of installation a driving chain is omitted, and the overall installation and use are further facilitated, so that the installation and dismounting efficiency is greatly improved, and the use convenience is improved.

The invention discloses a replaceable five-prevention lock protective cover. The replaceable five-prevention lock protective cover comprises a protective cover body, a protective lock body, a protective lock handle and a lower cover. The protective lock handle is arranged at the upper end of the protective lock body. The lower cover is arranged at the lower end of the protective lock body. A clamping boss is arranged in the position, corresponding to the protective lock body, of the lower cover. Locating bosses are arranged on the two sides of the clamping boss. The lower end of the protectivelock body is provided with locating grooves matched with the locating bosses. A non-penetration cavity is formed in the protective lock body from bottom to top. Through the replaceable five-prevention lock protective cover, the service life of a lock is prolonged, and the dust accumulation prevention effect is good; the problems that a lock is poorer in reliability, is damaged easily and cannot be opened due to the phenomena of sand accumulation, rustiness and electrochemical corrosion in a lock body are avoided; the operation efficiency of operation and maintenance personnel is improved.