69results about How to "Save layout space" patented technology

The invention relates to a low-loss corner-lifting and movement tearing cooperative type film tearing process of a screen display glass protective film. The process comprises the following steps: S1, tearing a film on an A surface; s2, transferring the screen display glass; and S3, tearing the film on the surface B. On one hand, in single-face film tearing, based on cooperation of the film tearing clamping jaw, the rolling wheel and the air nozzle, angle lifting is completed while the film tearing angle adhesive force is kept larger than the protective film tearing force, the damage and fracture rate of an adhesive tape and a corner is reduced, the high angle lifting success rate is achieved, meanwhile, through movement cooperation of the screen display glass and the film tearing clamping jaw, the film tearing difficulty is low, control is easy, and the film tearing efficiency is improved. The integrity and continuity of film tearing are high; on the other hand, overturning of the screen display glass is not needed in double-sided film tearing, transferring of the screen display glass is achieved in the protective film tearing process, the accidental friction rate in the glass overturning process is reduced, the structure is optimized, the layout space is greatly reduced, the equipment is miniaturized, and the double-sided film tearing efficiency of the equipment for treating the screen display glass is also improved.

The utility model relates to a tool changing device and a machining system, the tool changing device comprises a pick-and-place mechanism, and the pick-and-place mechanism is used for picking and placing a cutter head or a cutter box; in the cutter position, the cutter obtained by the taking and placing mechanism is placed in the cutter position, and the new cutter box and the old cutter box are exchanged in the cutter position; and the cutterhead opening and closing mechanism is used for opening or closing the cutterheads at the cutterhead positions, when the cutterheads are opened, the cutter boxes can be taken out or put into the cutterheads, and when the cutterheads are closed, the cutter boxes in the cutterheads are fixed. The cutter box in the cutter head can be replaced on the cutter replacing device, efficient circulation of cutters is achieved, the number of used cutter heads is reduced, and cost is reduced.

This invention provides a coolant flow channel plate, relating to the technical field of vehicle thermal management. It includes a cover plate fixed to the top of a main board, with the main board and cover plate welded together at their side edges to form an internal flow channel cavity. The cover plate has refrigeration unit inlet / outlet assemblies on its surface. The main board has, from left to right, a heater pump mounting port, a battery pump mounting port, and a motor pump mounting port. The circuits between the heater pump and battery pump mounting ports, and between the heater pump and motor pump mounting ports, within the internal flow channel cavity are each equipped with a first anti-heat-spreading section. The circuit between the motor pump and battery pump mounting ports forms a variable-diameter section, with a second anti-heat-spreading section at its front end. A guide section is provided on the circuit of the battery pump mounting port. This invention solves the problem of lacking anti-heat-spreading structures at the connection points of circuits in different temperature ranges, achieving the technical effects of reducing vehicle weight, reducing vehicle connection piping, reducing heat loss in the thermal management system, and improving thermal management efficiency.

The application relates to the field of vehicle technology and discloses an all-terrain vehicle, which comprises wheels, a power source, a front axle assembly and an input shaft. The wheels comprise front wheels and rear wheels. The power source drives the wheels to rotate. The front axle assembly is connected with the front wheels. The input shaft is connected with the front axle assembly and the power source. The front axle assembly comprises a driven device, an output gear, a first connecting wheel, a second connecting wheel and a friction assembly. The driven device comprises a fixedly connected driven gear and an inner housing. The output gear drives the front wheels. The first connecting wheel is engaged with the output gear. The second connecting wheel is engaged with the inner housing. The locking mechanism can drive the friction assembly to switch between a compression state and a free state. When the friction assembly is in the free state, the friction resistance between the output gear and the driven device is smaller than that when the friction assembly is in the compression state. The friction torque of the friction assembly is increased, the assembly efficiency of the friction assembly is improved, and the size of the transmission assembly is reduced.

The utility model discloses a surge current suppression circuit suitable for high-voltage input, which belongs to the technical field of power electronics and comprises an MOS (metal oxide semiconductor) tube, a triode, a first capacitor and a second capacitor. A collector electrode of the triode is connected to a power supply positive electrode line through a resistor, an emitter electrode of the triode is connected to a power supply negative electrode line, a base electrode of the triode is divided into two paths, one path of the base electrode of the triode is connected with a source electrode of the MOS tube through a sixth resistor, and the other path of the base electrode of the triode is connected with a drain electrode of the MOS tube through a fourth resistor; one end of the first capacitor is connected between the second resistor and the first resistor, and the other end of the first capacitor is connected to the power supply cathode line; and the MOS tube is connected to a power supply cathode line. Compared with the prior art, the circuit does not need an auxiliary power supply and an operational amplifier circuit, so that the cost and the arrangement space are saved, the related requirements of GJB181A-2003 on the input current are met, and the power supply and front-end equipment can be protected.

The invention relates to the technical field of sensor packaging, and discloses a packaging structure and method of an optical sensor and electronic equipment, and the packaging structure comprises a lead frame, and a radio frequency main control chip and an optical sensor chip which are fixed on the lead frame; the lead frame comprises a first base island, a second base island, a radio frequency antenna and a pin group, and the first base island and the second base island are electrically isolated from each other; the radio frequency main control chip is mounted on the first base island, the surface, deviating from the light-sensitive surface, of the optical sensor chip is mounted on the second base island, and a radio frequency transceiving pin of the radio frequency main control chip is connected with the radio frequency antenna; a data transmission pin of the optical sensor chip is connected with a corresponding function pin of the radio frequency main control chip; and the radio frequency main control chip and the optical sensor chip are respectively connected to corresponding pins in the pin group. According to the invention, the radio frequency path can be shortened, the anti-interference performance is improved, and high-integration low-cost packaging is realized.

This invention discloses a boost DC bus voltage matching system for a motor inverter with dual high-voltage battery packs, comprising a battery management system, battery pack A, battery pack B, main negative contactor R2, main positive contactor R3, main negative contactor R4, a first voltage sensor, a first current sensor, a second voltage sensor, a second current sensor, a third voltage sensor, a vehicle control unit, a generator control module, an inverter, a generator, a relay Rb, current sensors a1, b1, and c1, a DC link capacitor bank CDC, a power inverter module, a motor controller, current sensors a2, b2, and c2, and a traction motor. The invention features a highly integrated hardware architecture, effectively reducing system cost and space occupation, enabling seamless battery pack switching during driving, effectively suppressing surge current, protecting high-voltage components and ensuring power stability, improving system fault tolerance, and enhancing the operational reliability of the high-voltage system.

The utility model discloses an integrated braking and parking device which comprises a pedal plate and a braking assembly in transmission connection with the pedal plate, and further comprises a parking plate in transmission connection with the pedal plate and provided with a braking groove of a one-way limiting structure. The parking pawl is connected with the fixing component through an elastic piece, and the elastic piece is used for forcing the parking pawl to be meshed with the braking groove so as to prevent the parking plate from returning; an energy storage element is arranged between the parking pin shaft and the parking pawl, and the energy storage element stores or releases energy when the distance between the parking pawl and the parking pin shaft changes; the guide structure is fixed on the parking plate and comprises a separation limiting part and a guide surface; braking, parking and unlocking are achieved through different strokes of the pedal. The vehicle brake system has the advantages that the problems that braking and parking of an existing vehicle brake system need to be controlled by two parts, and operability is poor can be effectively solved. The operation process of the driver is greatly simplified, the operation complexity is reduced, and the convenience in the driving process is improved.

The application discloses a stainless steel nuclear-grade straight stroke piston type pneumatic actuator, which comprises a cylinder body, an upper cylinder cover, a lower cylinder cover, a piston, a piston rod, an open-close nut device, a hand wheel and a position indicating device, the upper cylinder cover is connected with the first end of the cylinder body through a mortise and tenon joint, the lower cylinder cover is connected with the second end of the cylinder body through a mortise and tenon joint, the piston rod passes through the upper cylinder cover, the piston and the lower cylinder cover, the open-close nut device is arranged on the part of the piston rod located outside the cylinder body and close to the upper cylinder cover in a circumferential direction, the end of the open-close nut device, which is far away from the upper cylinder cover, is connected with the hand wheel in a circumferential direction, and the end of the piston rod, which is close to the upper cylinder cover, is further connected with the position indicating device. The application solves the stress deformation under high-temperature and earthquake working conditions, avoids the screw thread from being locked to cause the actuator to be unable to be disassembled, and saves the arrangement space.

The application belongs to the technical field of air conditioners and heat management systems, and particularly relates to an integrated heat pump air conditioner and heat management system and a control method thereof, wherein the integrated heat pump air conditioner and heat management system comprises a refrigerant circulation system, a refrigerant liquid circulation system, a first heat management system and a second heat management system. The refrigerant circulation system, the refrigerant liquid circulation system, the first heat management system and the second heat management system provided by the application can ensure the heating, refrigeration, dehumidification and demisting and other functions and comfort of the vehicle air conditioner system, fully meet the needs of users, and meet the requirements of energy saving and consumption reduction, easy assembly, easy maintenance, good durability, high reliability and light weight, and the control method is intelligent, perfect and reasonable. In addition, the main scene used by the application has the characteristics of typicalization, simplification and rationalization, is conducive to the optimal design of the six-way valve and the eight-way valve, and thus the target of reducing water resistance and system operation noise is achieved.

The application relates to the field of wireless communication technology and provides a radio frequency module and a preparation method thereof.The radio frequency module comprises a substrate layer, first and second surface mount substrates, a first functional device, a second functional device, a third functional device and a packaging shell;the inner layer of the multilayer substrate layer is integrated with a first inner layer trace;the inner layer of the plurality of first surface mount substrates is integrated with a second inner layer trace and a first embedded inductor;the first functional device and the first embedded inductor are electrically connected with the second inner layer trace respectively;the inner layer of the plurality of second surface mount substrates is integrated with a third inner layer trace and a second embedded inductor;the layer number and thickness of the first surface mount substrate are smaller than those of the second surface mount substrate;the thickness of the first functional device is greater than that of the second functional device, and the thickness of the third functional device is greater than that of the first functional device.The radio frequency module can save the third functional device, surface layer layout and inner layer trace space.

The utility model relates to battery technical field discloses circuit board, battery and terminal equipment, and circuit board includes: board body, first connecting assembly and second connecting assembly, board body includes main body and staggered arrangement at least one first extension and second extension of main body, first extension and second extension are arranged in any one side of main body respectively, and first extension and second extension can all fold towards main body, first connecting assembly sets up in first extension, second connecting assembly sets up in second extension, the utility model adopts the extension of board body to bear first connecting assembly and second connecting assembly, can spare more cloth piece arrangement space for main body, in addition, since first extension and second extension can fold towards main body and staggered arrangement, both can avoid the interference of extension when folding, simultaneously also can avoid the circuit of first connecting assembly and second connecting assembly on the same plane forms the overlap.

A handrail device and a vehicle are provided. The handrail device comprises a handrail body (10), a cover plate assembly (20) arranged on the handrail body (10), and a pivoting device (40) configured to pivot the cover plate assembly (20) relative to the handrail body (10). The handrail device comprises a lifting mechanism (30) connected between the pivoting device (40) and the handrail body (10), such that the pivoting device (40) and the cover plate assembly (20) can be raised and lowered relative to the handrail body (10). The handrail device thereby requires only a small deployment operating space and can be adjusted in use height, and can be firmly fixed during use.

The utility model provides a gas-liquid-electricity integrated rotating device. The gas-liquid-electricity integrated rotating device comprises an electric slip ring, a liquid medium transmission pipe and a gas medium transmission cylinder, the electric slip ring is connected with the top of the gas medium transmission cylinder, and the liquid medium transmission pipe sequentially penetrates through the electric slip ring and the gas medium transmission cylinder in the axial direction and extends out of the gas medium transmission cylinder. A wire penetrating pipe used for leading out an electric slip ring wire is arranged in the gas medium transmission cylinder, one end of the wire penetrating pipe penetrates through the top of the gas medium transmission cylinder and communicates with the electric slip ring, and the other end of the wire penetrating pipe extends out of the gas medium transmission cylinder. A vacuum pipe is connected beside the gas medium transmission cylinder in the radial direction; through cooperation of the electric slip ring, the liquid medium transmission pipe and the gas medium transmission cylinder, the combined transmission function of gas, liquid and electricity media is achieved, transmission channels of the three media are independent of one another and do not affect one another, the pipeline arrangement space is greatly saved in the space occupation, and the cost is reduced. And the circuit layout of the three media is more concise and reasonable.

This invention provides a gooseneck steering knuckle assembly and a vehicle having the same. The gooseneck steering knuckle assembly includes a steering knuckle body, which comprises a main body and a gooseneck. A first mounting hole is provided on the gooseneck for the motor and controller of an electromechanical brake to pass through, thereby connecting the gooseneck steering knuckle assembly to the electromechanical brake. By using the technical solution of this invention, and by providing a first mounting hole in the gooseneck for assembling the electromechanical brake, compared to arranging the brake on the side of the bearing, the brake's motion envelope is smaller, resulting in a more compact suspension arrangement. The saved space can be used to increase the wheel steering angle and the size of the electromechanical brake motor, thereby improving braking capability.

The utility model discloses a novel double piston mini cylinder body structure, its characterized in that, including cylinder body and set up inside the cylinder body and be used for realizing double -deck pressure boost's double piston structure and set up on the cylinder body with the valve needle cooperation of double piston structure, the inside of cylinder body is supported block and is divided into two complete working cavities, the working cavity is respectively upper piston cavity and lower piston cavity. The utility model has the beneficial effect that: the utility model adopts double piston design through compact layout, realizes higher performance under the same volume, two pistons can work synchronously, provides superimposed thrust, reduces the gas consumption through optimizing the gas circuit design (share intake valve), and the core value of double piston small cylinder is in through structural innovation, breaks through the performance bottleneck of traditional cylinder under the premise of miniaturization, has the power, precision and reliability, especially suitable for the demand of modern industry to high efficiency, intelligence, compact.

The utility model provides a kind of one-in multi-out check valve, the one-in multi-out check valve includes valve body, cover and valve core of the valve cover being arranged in the top of valve body, the inside of valve body is provided with flow cavity, the bottom of valve body is provided with import with flow cavity intercommunication, the side of valve body is provided with at least two exports with flow cavity intercommunication, one end of valve core abuts valve cover, the other end of valve core can block the junction of import and flow cavity.The one-in multi-out check valve is matched by valve cover, valve body and valve core, import is simultaneously set in the bottom of valve body, and at least two exports are set in the side of valve body, so that the one-in multi-out check valve can be directly assembled and connected with multiple direction pipes, without installing three-way, four-way and other pipe fittings, simplify pipeline system structure, reduce the quantity of connecting component and overall manufacturing cost, while due to the reduction of connection node, improve system reliability while reducing the difficulty of later maintenance.

A novel generator support belongs to the technical field of engines. A first generator mounting hole and a second generator mounting hole are formed in the support body and used for being fixedly connected with a generator assembly, and a first support mounting hole, a second support mounting hole, a third support mounting hole, a fourth support mounting hole and a fifth support mounting hole are formed in the support body and used for being fixedly connected with an engine cylinder. The first support mounting hole and the fifth support mounting hole are axial holes and used in cooperation with an axial positioning structure of an engine cylinder block, and an avoiding structure, a weight reduction structure and a plurality of reinforcing ribs are arranged on the support body. The novel generator support provided by the utility model has remarkable beneficial effects in the aspects of stably fixing a generator assembly, realizing lightweight design, optimizing spatial arrangement, improving assembly precision and stability, enhancing structural strength, facilitating maintenance and replacement, integrally casting and forming and the like, and has wide application prospect and market value.

This application relates to the field of parts inspection technology, and discloses a parts inspection fixture, including a feeding conveyor belt, an inspection device, an unloading conveyor belt, and a transfer device. The discharge position of the feeding conveyor belt, the inspection device, and the feed position of the unloading conveyor belt are arranged sequentially along a first direction. The transfer device includes a first clamping device, a linkage device, and a second clamping device connected together. The clamping end of the first clamping device moves at least along the first direction to clamp the part to be inspected at the discharge position at the first clamping position, and places it in the inspection device for inspection at a first placement position. The clamping end of the second clamping device moves at least along the first direction to clamp the part inspected on the inspection device at the second clamping position, and places it in the feed position at the second placement position. The linkage device triggers the second movement by causing the first movement. This fixture requires fewer operators, is highly efficient, and produces good quality.

The utility model discloses a motor casing, motor assembly and vehicle belong to vehicle technical field, and this motor casing is provided with oil inlet flow channel, oil outlet flow channel, liquid inlet flow channel, first liquid outlet flow channel and second liquid outlet flow channel, and the outlet of oil inlet flow channel is adapted to communicate with the oil inlet of oil cooler, and the import of oil outlet flow channel is adapted to communicate with the oil outlet of oil cooler, and the outlet of liquid inlet flow channel is adapted to communicate with the liquid inlet of oil cooler, and the import of first liquid outlet flow channel is adapted to communicate with the liquid outlet of oil cooler, and second liquid outlet flow channel communicates with liquid inlet flow channel, and the motor casing has fluid transmission function, can reduce the use of external pipeline, is favorable to save pipeline cost, and can reduce the connecting operation of pipeline, is favorable to assembly cost, can also reduce the occupied space of pipeline, is favorable to save the layout space of whole vehicle, is convenient for the arrangement of motor assembly in the car, and additionally can shorten the transmission path of fluid, reduce flow resistance, improve the transmission efficiency of fluid.

The invention discloses a vehicle door anti-collision plate which comprises an outer-layer steel plate, a middle-layer honeycomb core and an inner-layer plate which are sequentially arranged, and the outer-layer steel plate, the middle-layer honeycomb core and the inner-layer plate are glued and then are subjected to hot-pressing curing to form an integrated anti-collision plate structure. A set of steel plate gluing grooves are formed in the outer side of the outer-layer steel plate in the length direction, and normal-temperature expansion glue is smeared in the steel plate gluing grooves. The invention further discloses an automobile door which comprises an automobile door inner plate, an automobile door outer plate and the automobile door anti-collision plate, the two ends of the anti-collision plate are fixed to the automobile door inner plate through fasteners, and the outer-layer steel plate is connected with the automobile door outer plate through the normal-temperature expansion glue in the surface groove. A three-layer structure with rigid outside and flexible inside is adopted, the arrangement space of the automobile door is effectively saved, and automobile door modeling design optimization is assisted; the three layers of materials adopt the combination of the elasticity modulus and the density index gradient, the weight reduction target is achieved, an ordered energy absorption path is formed, the Y-direction invasion amount during collision can be remarkably reduced, and the anti-collision performance is improved.

This utility model discloses a battery pack cooling system for a range-extended tractor, including a heat exchanger, an electronic water pump connected between the inlet and outlet of the heat exchanger, and a battery pack. A mechanical compressor, a three-way valve, and a first condenser are sequentially connected between the outlet and inlet of the heat exchanger. A second condenser and an evaporator for cooling the passenger compartment are sequentially connected between the other port of the three-way valve and the outlet of the heat exchanger. It features low cost, reduced system layout space, and ensures sufficient additional cooling capacity for the battery pack, allowing for rapid cooling even under extreme operating conditions.

This application discloses a display panel and a display device. The display panel includes: a light-emitting element; a pixel circuit and a driving circuit, wherein the driving circuit provides control signals to the pixel circuit, and the pixel circuit is electrically connected to the light-emitting element; the display panel includes a first region and a second region, the pixel circuit includes a first pixel circuit located in the first region and a second pixel circuit located in the second region, the length of the first pixel circuit in a first direction is less than the length of the second pixel circuit in the first direction; the driving circuit includes a first driving circuit, the first driving circuit including a plurality of first shift registers cascaded along a second direction, the first direction and the second direction intersect; wherein, in the second direction, the first shift registers at least partially overlap with the light-emitting element. The technical solution of this application can reduce the bezel width of the display panel in the first direction, or even enable the display panel to achieve a bezel-less design in the first direction.

The utility model discloses a battery pack with a thermal runaway protection structure, which comprises a battery box body, a battery cell module and a liquid cooling plate for dissipating heat of the battery cell module are arranged in the battery box body, a cooling liquid flow channel is arranged in the liquid cooling plate, a liquid inlet and a liquid outlet which extend out of the battery box body are connected onto the liquid cooling plate, a fire-fighting spray head is arranged in the battery box body, and the fire-fighting spray head is connected with the battery box body. The fire-fighting spray header is installed on the liquid cooling plate and communicated with the cooling liquid flow channel in the liquid cooling plate, and a thermal control opening mechanism is arranged on the fire-fighting spray header. The cost of the fire extinguishing system can be effectively reduced, the design is simplified, and meanwhile the fire extinguishing efficiency can be improved.

The utility model relates to a mobile support of erosion ditch side slope surveying instrument belongs to surveying instrument support technical field, in order to solve the problem that the weight is bigger, and the motion flexibility is not high when the existing erosion ditch side slope is measured through surveying instrument, the utility model includes surveying instrument mounting panel, a plurality of support rod assemblies for supporting are installed to the bottom edge of surveying instrument mounting panel, the bottom center of surveying instrument mounting panel is installed the foldable mobile unit for driving surveying instrument mounting panel and support rod assembly moves, foldable mobile unit includes the vertical support of installation in surveying instrument mounting panel bottom, the bottom of vertical support is hinged and is used for moving folding wheel assembly, the utility model is mainly used as the auxiliary support of driving side slope surveying instrument to move and support in the erosion ditch side slope measurement process.

The utility model provides a new energy automobile heat management integrated module water side runner plate assembly and an automobile. The new energy automobile heat management integrated module water side runner plate assembly comprises a plate assembly, a five-way water valve, a three-way water valve, a warm air water pump, a battery water pump and a motor water pump, a flow channel for a motor, a flow channel for a battery and a flow channel for warm air are formed in the plate assembly; the motor water pump is communicated with the motor runner, the battery water pump is communicated with the battery runner, and the warm air water pump is communicated with the warm air runner; the motor flow channel is communicated with the battery flow channel through a five-way water valve, and the three-way water valve is arranged in the warm air flow channel. Through the integrated design of all the assemblies, the weight of the whole vehicle is reduced, and parts of the whole vehicle are reduced; due to the fact that the number of connecting points between the pipelines is reduced, the leakage risk of the system is reduced; the arrangement space of the whole vehicle is saved, the installation complexity of sub-assemblies is reduced, and installation is convenient and fast; the loading efficiency is improved, and subsequent fault detection and maintenance are facilitated.

The utility model provides a concrete switch tie assembly type long-line pedestal method production line system. The concrete switch tie assembly type long-line pedestal method production line system comprises a tensioning frame assembly device and a model assembly device. The tensioning frame assembling device comprises a rectangular frame composed of two cross beams (1) and two longitudinal beams (2), one end of the frame is provided with a tensioning end beam (3), and the other end of the frame is provided with a fixed end beam (4). The model assembling system comprises a steel mold (5) erected on the frame, and the steel mold (5) is formed by connecting three molds end to end. The assembly type long-line pedestal has the advantages that an assembly type long-line pedestal method is adopted, production efficiency and economic benefits are improved, and labor cost is saved. And splicing points are reduced, and errors are reduced. And moreover, the layout space is reduced, the labor cost is reduced, the purposes of improving the production efficiency and the economic benefits are achieved, and automatic and assembled production is realized.

This invention provides a packaging structure. In the packaging structure, the lead frame includes at least two solder pads; the back of the chip is mounted on the lead frame, and the front of the chip has multiple solder pads. At least a portion of the solder pads of the lead frame are electrically connected to the solder pads of the chip via bonding wires; a passive device is disposed between and electrically connected to the two solder pads of the lead frame; a molding compound encapsulates the chip and bonding wires, and covers at least a portion of the surface of the solder pads and at least a portion of the surface of the passive device. This avoids mounting the passive device on the PCB outside the packaging structure, significantly reducing PCB layout space, greatly shortening the interconnection distance between the passive device and the chip, reducing the current loop area, reducing parasitic inductance of high-frequency signal paths, reducing magnetic field radiation (i.e., reducing electromagnetic interference), improving high-frequency performance, and reducing coupling with external interference, thus improving electromagnetic compatibility.

The present disclosure relates to a heat dissipation fan for a hybrid vehicle, a control method thereof, an electronic device and a vehicle. The heat dissipation fan comprises: a fan blade; a rotating shaft connected at a center position of the fan blade to drive the fan blade to rotate; an electric motor comprising a housing, a rotor and a stator, the stator being fixed inside the housing, the rotor being rotatably arranged in the housing and extending out of the housing at an end portion, the rotor being coaxially connected with the rotating shaft; and a driving wheel for transmission connection at an output end of an engine, the driving wheel being rotatably sleeved outside the housing and selectively engaged with the rotating shaft through a clutch. In use, the fan can be driven to rotate by the driving wheel alone, and when the driving wheel is not working, the fan can be driven to rotate by the electric motor. The fan can be shared in different driving modes of the vehicle, and the vehicle does not need to be separately provided with two fans to adapt to different driving modes, thereby saving arrangement space and avoiding mutual influence of two sets of heat dissipation systems on a heat dissipation flow field.

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a first buffer layer, a first device layer and a second device layer, wherein the first device layer and the second device layer are arranged in the vertical direction of the first buffer layer; the first device layer comprises at least one first transistor structure, a first signal line layer and a connecting column, the first transistor structure comprises a first electrode layer and a second electrode layer, the first signal line layer, the second electrode layer and the connecting column are arranged on the same layer, and the first signal line layer is connected with the connecting column; the second device layer comprises at least one second transistor structure and a third signal line layer, the second transistor structure at least comprises a third electrode layer, the third electrode layer and the third signal line layer are arranged on the same layer, and the first device layer is provided with a through first via hole corresponding to the vertical direction of the connecting column. The third signal line layer is connected with the connecting columns through the first via holes. A transistor structure and a signal line of a circuit are arranged in a laminated mode, the wiring flexibility is improved, and meanwhile the manufacturing process is simplified.