265results 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 embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and is used for optimizing the layout design of a pixel circuit. The display panel comprises a substrate and a pixel circuit located on one side of the substrate. The pixel circuit comprises a driving transistor, and an active layer of the driving transistor is located on an oxide semiconductor layer; a first electrode of the data write-in transistor is electrically connected with the data line, and a second electrode of the data write-in transistor is electrically connected with a first electrode of the driving transistor through a first connecting line; the first connecting line is located at one side of the oxide semiconductor layer away from the substrate.

The invention discloses a power battery mounting structure in the field of power battery systems. The power battery mounting structure comprises a frame assembly and a plurality of frame assemblies, the frame assemblies are fixed to the two sides of the frame assembly, a frame supporting component assembly is arranged between every two adjacent frame assemblies, every two opposite frame assemblies are connected through a supporting component, and the frame supporting component assemblies reduce stress loads borne by the frame assembly. A mounting area for fixing a power battery is arranged in each frame assembly, and the mounting area can be changed according to the volume of the power battery for multi-stage adjustment; a traditional battery installation mode is changed into a chassis side arrangement mode, it is guaranteed that the gravity center of the whole vehicle body does not shift, the gravity center lowering effect is achieved, the space on the two sides of the vehicle frame assembly is utilized, the size occupied by battery installation is reduced, and matching of different electric quantity requirements of the whole vehicle is achieved; the structural design of reducing cost and weight is carried out on the premise of meeting the strength requirements of typical extreme working conditions.

The present invention provides a stacked cascade GaN-based power device and a packaging method thereof. The device structure is a DBC double-sided ceramic substrate with through holes and grooves bonded on a TO-220 frame, a GaN-based chip bonded in the groove of the DBC ceramic substrate, and a vertically structured silicon-based MOSFET stacked on the source of the GaN-based chip to form a Cascode cascade structure. The present invention realizes the Cascode cascade structure by rationally arranging the GaN-based chip and the silicon-based MOSFET chip, thereby reducing the area of ​​the frame occupied by the chip, reducing the volume of the package body and improving the selectivity of the packaging form; the high thermal conductivity DBC double-sided ceramic substrate with through holes and groove structures increases the contact area between the chip and the high thermal conductivity material, improves the heat dissipation performance of the chip, optimizes the process steps, and improves the reliability and practicality of the device.

The invention discloses a dual-mode driving parking air conditioning system for a military fuel vehicle and a refrigeration method, and the system comprises a compressor and support module, a condensation heat dissipation module, an evaporator and pipeline module, a power supply and wiring harness module and a liquid storage module, the power source and wire harness module serves as the core of the system to support a chassis power drive mode and a mains supply mode, the power source and wire harness module comprises a dual-mode integrated air conditioner comprehensive power source (16) providing power for the dual-mode integrated compressor (1) and a connecting wire harness (24) providing power for the dual-mode integrated air conditioner comprehensive power source (16), and the connecting wire harness (24) is externally connected with a mains supply through an input aviation plug (4). During driving, the engine drives the compressor to rotate through the transmission belt (3); during parking, the electric drive controller (106) of the compressor converts the commercial power AC220V into the power supply voltage DC300V required by the compressor to drive the compressor to work, so that two working modes of power take-off by a chassis transmission belt during driving and power supply by the commercial power during parking are realized, and the refrigeration requirements during driving and parking are met.

The invention provides an electromagnetic differential lock for an automobile, which comprises a shell, a differential mechanism arranged in the shell and a locking mechanism arranged on one side of the shell and used for locking the differential mechanism, and an electromagnetic component acting on the locking mechanism is arranged at the outer end of the shell so as to control the locking mechanism to act through the electromagnetic component. The main shell drives the combination ring to rotate, the combination ring is pressed on the spacing plate by the wave spring and drives the spacing plate to rotate together, when the differential function is locked, the electromagnetic coil adsorbs the spacing plate to generate braking, so that the rotating speed difference is generated between the spacing plate and the main shell, and the combination ring abuts against the interior of the spiral groove through the spherical surface at the tail end of the clamping jaw. And the combination ring is pushed to perform axial displacement by utilizing the lift of the inclined end surface of the spiral groove, so that the combination ring and the first half axle gear are locked. And during resetting, the electromagnetic coil is powered off, and the combination ring is pushed by the wave spring to move, so that the first combination tooth is separated from the second combination tooth.

According to the integrated calculation unit for the vehicle-mounted cabin driving, the two independent function modules are integrated into the calculation unit module through the liquid cooling plate for connection, the principle that double-face heat dissipation can be achieved through one liquid cooling plate based on one liquid cooling flow channel is utilized, and the heat conduction bosses are arranged on the two sides of the liquid cooling plate respectively; and cooling the chips of the two independent computing module mainboards. Mainboards of different functional modules are integrated on the same structure, and compared with an original design mode of independent functional modules, a set of heat dissipation structural parts and carrier structural parts can be saved; for the whole vehicle design, on one hand, the number of electric appliance parts can be reduced, on the other hand, whole vehicle water path branches in a vehicle system can be reduced, water path connectors are reduced, the whole vehicle space layout is reduced, and meanwhile the cost is saved.

The utility model discloses a desulfurizing absorption tower synergistic device which comprises a multiphase flow reinforced rotary-cut turbulent flow unit arranged at the upper part in a tower body of a first-stage absorption tower, and the multiphase flow reinforced rotary-cut turbulent flow unit is arranged between a spraying layer and a flue gas inlet in the absorption tower; the multiphase flow reinforced rotary-cut turbulent flow unit comprises a horizontal mounting plate and a turbulent flow module arranged on the mounting plate; the turbulent flow module comprises an inner cylinder, a middle cylinder and an outer cylinder, the inner cylinder is sequentially sleeved with the middle cylinder and the outer cylinder, first blades are evenly distributed between the middle cylinder and the outer cylinder in the circumferential direction, and second blades are evenly distributed between the inner cylinder and the middle cylinder in the circumferential direction. Slurry sprayed by the spraying layer and rising flue gas are fully mixed under the action of the multiphase flow reinforced rotary-cut turbulent flow unit and then fall to the bottom of the absorption tower. The spirally rising flue gas can increase the gas-liquid contact area and improve the gas-liquid mass transfer rate, so that the desulfurization and dust removal efficiency is improved.

The utility model relates to the technical field of electronic equipment, and discloses a circuit board and electronic equipment, the circuit board is provided with a differential signal hole group, and the hole group comprises a first signal hole pair and a second signal hole pair; wherein the two signal holes in the first signal hole pair are symmetrical about the first symmetry axis and located on different sides of the first symmetry axis, the first symmetry axis sequentially passes through the circle centers of the two signal holes in the second signal hole pair, and the first signal hole pair and the second signal hole pair are located on different sides of the first reference straight line respectively. The first reference straight line is perpendicular to the first symmetry axis. According to the circuit board and the electronic equipment provided by the invention, the crosstalk phenomenon between the differential hole pairs can be weakened, and the signal quality and the signal integrity are ensured.

The invention discloses a power supply link detection and sampling sub-circuit, a power signal detection circuit and a power signal detection system, and relates to the technical field of server board-level power supply design, a fuse device and a first temperature-sensitive device are arranged in a superposed manner, and the layout space required by the fuse device and the first temperature-sensitive device is reduced; the current detection of the power supply link is realized by using the conduction resistor of the safety device, and a power sampling resistor does not need to be connected in series, so that the occupation of a layout space can be further reduced, the layout space of a circuit board can be further optimized, the through-current loss of the power supply link can be reduced, and the low-loss detection of the power supply link can be realized. Therefore, the problems of how to optimize the layout space of the circuit board and reduce the loss of the power supply link and the like in related technologies can be solved, and the technical effects of optimizing the layout space of the circuit board, reducing the through-current loss of the power supply link and the like are achieved.

The utility model discloses a dual-motor driving system which comprises a first motor and a second motor which are vertically arranged, the first motor and the second motor are close to each other, motor shafts of the first motor and the second motor are arranged in a back-to-back mode, and the motor shaft of the first motor is in transmission connection with a first output shaft through a first transmission assembly. A motor shaft of the second motor is in transmission connection with a second output shaft through a second transmission assembly, the first output shaft and the second output shaft are coaxial, and the distance between the first output shaft and the motor shaft of the first motor is equal to the distance between the second output shaft and the motor shaft of the second motor. The utility model has the advantages that: the layout is reasonable, the radial arrangement of the first motor and the second motor can greatly reduce the axial size, reduce the occupied arrangement space of the chassis structure, and can give consideration to the dynamic property and economical efficiency of the whole vehicle to the greatest extent. According to the design, the requirement for the space of the whole vehicle is low, and wide applicability is achieved.

The invention relates to the technical field of injection water treatment, in particular to an injection water production process and device. According to the production process of the water for injection, the raw water is preheated to the set temperature in a multi-stage preheating mode; raw water is introduced into the vertical evaporator and submerges the evaporation surface of the vertical evaporator so as to generate pure steam; and introducing the pure steam into an outer cavity of an evaporation tube bundle of the vertical evaporator, so that the pure steam is condensed into distilled water while the raw water is heated. When the water for injection is produced, raw water is preheated to a set temperature, then the raw water is introduced into the vertical evaporator and submerges the evaporation surface of the vertical evaporator so as to generate pure steam, and the raw water covers the evaporation surface and is naturally evaporated into the pure steam in a static state instead of being refined into mist by structures such as a nozzle, so that the water for injection is produced. Water drops or fog drops are not prone to being mixed into the pure steam, the purity of the pure steam is high, and the follow-up pure steam treatment difficulty and treatment cost are reduced.

The utility model relates to the technical field of sound boxes, and provides a record player-imitated sound box which comprises a base and a sound box shell arranged on the base, the sound box shell comprises a first shell and a second shell connected to one side of the first shell, and the lower end face of the second shell is higher than the lower end face of the first shell. The upper end face of the second shell is lower than the upper end face of the first shell. The disc-shaped turntable is rotatably mounted on the front side of the second shell; the electric control rotation driving part is arranged in the sound box shell and is in transmission connection with the turntable; and the operation part is arranged on the first shell and is at least used for controlling on and off of a playing function of the record player imitating type sound box and on and off of the electric control rotation driving part, the space layout of the sound box shell of the record player imitating type sound box is very reasonable and simple, a certain illumination effect is achieved through the atmosphere lamp, and the attractiveness of the sound box is improved.

The invention provides a novel fuel cell system stack inlet end integrated structure. The novel fuel cell system stack inlet end integrated structure comprises a left manifold assembly, an ejector assembly, a hydrogen water segregator assembly, a right manifold assembly, a gas port end plate assembly and an airtight insulating plate which are integrated into a whole, the left manifold assembly and the right manifold assembly are respectively connected to the air port end plate assembly to form an air and cooling water in-pile channel and an air and cooling water out-pile channel; the air port end plate assembly comprises an air port end plate; the gas port end plate and the airtight insulating plate form a hydrogen channel; the ejector assembly is used for providing hydrogen for the electric pile; the hydrogen water separator assembly is used for carrying out hydrogen-water separation on water-containing mixed hydrogen; and the hydrogen channel is used for feeding the separated hydrogen into the ejector assembly, and the separated hydrogen and the hydrogen introduced by the ejector assembly are mixed together and then enter an electric pile. The problems that a hydrogen fuel cell system is complex in arrangement structure and large in size, and consequently the whole vehicle arrangement consumes much time and is high in difficulty are solved.

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.

The invention discloses an electric shaver which comprises a first main body and a second main body, the first main body is configured to be grabbed by a hand, the second main body comprises a tool bit and a motor which are connected together, a cutting assembly is arranged on the tool bit, the motor is used for driving the cutting assembly to work, and the second main body is connected to the first main body in a floating mode. And the second main body and the first main body are arranged at an angle a. The floating tool bit has the characteristics of simple structure, good floating effect and good veneering effect of the working surface of the tool bit during operation, and the size is reduced and the space layout is optimized.

The invention relates to an integrated plate heat exchanger with a liquid storage function, which comprises a water-cooling condensation module and a heat regeneration module which are connected through a middle connecting plate. The water-cooling condensation module is provided with a cooling liquid channel and a refrigerant channel which are formed by alternately stacked laminations, and the water-cooling condensation module is used for cooling a refrigerant; the heat return module is provided with a refrigerant high-pressure channel and a refrigerant low-pressure channel which are formed by a plurality of layers of laminations, and heat exchange between high-pressure refrigerants and low-pressure refrigerants is achieved. The heat regeneration module further comprises a liquid storage cavity and a drying bottle which are used for storing the supercooled liquid refrigerant and absorbing water correspondingly. And the refrigerant flows out from the refrigerant high-pressure outlet after being dried and filtered. The structure integrates multiple functions of the water-cooling condenser, the liquid storage tank and the heat regenerator, the number of system pipelines and the number of parts are reduced, and the risk of system refrigerant leakage is reduced. And the drying bottle adopts a detachable design and is convenient to maintain and replace. In addition, the size and the weight of the heat exchanger are reduced through modular design, the integration and the production efficiency of the heat management system are improved, and the heat management system is suitable for the electric vehicle heat management system needing compact space layout.

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 invention discloses a rope wheel wear resistance testing device which comprises a wheel carrier, a speed reducer placed below the wheel carrier and a motor, the speed reducer and the motor are connected together through a coupler, and the output shaft end of the speed reducer is connected with a driving wheel. The testing device further comprises a rope supporting wheel set and a tail wheel assembly, the rope supporting wheel set comprises a rope wheel, a rope wheel clamping plate and a clamping groove, the tail wheel assembly comprises a tail wheel, a tail wheel connecting hole located in the upper portion of the tail wheel and an installation frame installed on the wheel frame, and the tail wheel can move up and down along the installation frame. The distance between each rope wheel of the rope supporting wheel set and the vertical rod of the wheel carrier is different, and the wrapping angles of the steel wire rope wound on the rope wheels are different, so that the abrasion degree of the rope wheels at different wrapping angles can be tested. The steel wire rope is tensioned by applying the heavy hammer blocks, and the tensile force applied to the rope sheave is different by applying the heavy hammer blocks with different weights, so that the abrasion degree of the rope sheave under different tensile forces can be tested.

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 outer mold machining center for steam turbine valve casting comprises a machine body, a portal frame and a workbench, and further comprises a pair of telescopic arms which are installed on the two sides of the top face of the workbench face through corresponding sliding grooves. The pair of material lifting and clamping devices are mounted on the adjacent sides of the telescopic arms correspondingly and used for being matched with each other to lift and fix the workpieces; the telescopic control device is used for controlling the pair of telescopic arms to stretch out of or retract into the corresponding sliding grooves, in daily use, by means of the technical scheme, a worker only needs to start the telescopic control device to enable the pair of telescopic arms to stretch out, then the flat trolley is adopted to transfer the wooden outer mold to the position between the outer ends of the pair of telescopic arms, and the wooden outer mold can be conveniently taken out. And then the material lifting clamp is started to lift the wood outer mold and fix the wood outer mold between the pair of telescopic arms, the telescopic arms can retract into the sliding groove under the action of the telescopic control device, a wood outer mold blank is transferred to the position below the portal frame and fixed, the same way is adopted during discharging, feeding and discharging are conducted without the help of external equipment, and operation is convenient.

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.

The utility model relates to a multidirectional wiring harness switching box, which comprises a base and a top cover, a stud is arranged in the center of the top of the base, a nut is screwed on the stud, and a plurality of base wire harness guide structures are uniformly arranged on the edge of the top of the base; the top cover is of an upward concave structure, a plurality of top cover wire harness guide structures are uniformly arranged on the edge of the bottom of the top cover, the base wire harness guide structures and the top cover wire harness guide structures are correspondingly arranged, and the base and the top cover are detachably connected; the utility model has the advantages that the wire harness loop length can be shortened, the assembly convenience is improved, and the wire harness arrangement space is reduced.

The present application discloses a display panel and a display device, wherein the display panel includes a display area and a non-display area surrounding at least part of the display area, and the display panel includes: a substrate; a gate driving circuit and an electrostatic discharge protection circuit, which are arranged on one side of the substrate and located in the non-display area; the gate driving circuit includes a plurality of gate driving units; the electrostatic discharge protection circuit includes a plurality of electrostatic discharge protection units, and the arrangement tracks of the orthographic projections of the plurality of gate driving units on the substrate overlap with the arrangement tracks of the orthographic projections of the plurality of electrostatic release protection units on the substrate at least in part, and the arrangement tracks of the orthographic projections of the plurality of gate driving units on the substrate and the arrangement tracks of the orthographic projections of the plurality of electrostatic release protection units on the substrate extend along the extension direction of the side of the display area. The present application can avoid the electrostatic discharge protection circuit from occupying the layout space of the non-display area extra, thereby effectively compressing the space and meeting the requirement of a narrow frame of the display panel.

The utility model discloses a mounting pipe for air flow meter, engine air inlet pipeline and automobile, the mounting pipe for air flow meter comprises a first pipe body, a barrel-shaped body and an air outlet pipe, the first pipe body is provided with a mounting seat used for mounting an air flow sensor, the barrel-shaped body is buckled on the part of the first pipe body close to the air outlet end along the axial direction of the first pipe body, and the air outlet pipe is provided with an air inlet. The end, close to the installation base, of the barrel-shaped body is connected with the outer wall of the first pipe body in a sealed mode, a first airflow cavity is formed in the part, except the first pipe body, in the barrel-shaped body, an air outlet of the first airflow cavity is formed in the side wall of the barrel-shaped body, the air outlet pipe is connected with the air outlet, and the pipe wall of the air outlet pipe is in bypass connection with an access pipe used for being connected with a crankcase ventilation pipeline. According to the installation pipe for the air flow meter, a smaller arrangement space is utilized, and the problem that ventilation airflow of a crankcase influences measurement work of an air flow sensor is solved.

The invention discloses a special cab for an explosion-proof freight vehicle, which relates to the technical field of freight vehicle cables.The special cab comprises a cab outer shell, a cab door, an instrument panel and an electric appliance box, and the surface of the cab outer shell is covered with static conductive paint; a wire passing hole is formed in the middle of the bottom of the cab outer shell. A steering control device, a brake pedal and an accelerator pedal are arranged on the left side in the cab outer shell from front to back. The left side of the instrument board is fixedly connected with an anti-explosion knob and an anti-explosion display screen A button box is fixed on the side surface of the electric appliance box, the bottom of the electric appliance box is respectively provided with a chassis flame-proof distribution box, an upper flame-proof distribution box and a flame-proof control box, the chassis flame-proof distribution box, the upper flame-proof distribution box and the flame-proof control box are all made of aluminum alloy materials, and cable connectors are uniformly arranged on the side walls of the chassis flame-proof distribution box, the upper flame-proof distribution box and the flame-proof control box; according to the explosion-proof type freight vehicle, electrical equipment installed in the cab can work under the condition that the electrical equipment is isolated from the external environment, electric sparks are effectively prevented from being generated in the using process of the cab, and the safety of the explosion-proof type freight vehicle is improved.

The invention relates to an automobile thermal management system, in particular to an automobile circulating water supplementing system and a control method. The expansion kettle (1) is respectively connected with a battery heat management cooling system, an air conditioner heating circulating system and a motor electric control circulating system; the expansion kettle is connected with the battery heat management cooling system, the air conditioner heating circulation system and the motor electric control circulation system. The water replenishing requirement of each system loop of the whole vehicle can be met only by using one expansion kettle; the use number of the expansion kettles is effectively reduced, the arrangement space in a vehicle is saved, and the forecabin arrangement is simpler and more attractive; and meanwhile, the cost of parts is reduced.

The utility model provides a double-branch high-voltage box circuit, which comprises a first connecting module and a second connecting module, the first connecting module is provided with at least two positive first connecting ends and at least two positive second connecting ends, the at least two positive first connecting ends are respectively and electrically connected with the positive electrodes of corresponding battery modules, and the at least two positive second connecting ends are respectively and electrically connected with the negative electrodes of the corresponding battery modules. The at least two positive second connecting ends are electrically connected with the positive electrode of the to-be-charged equipment respectively; the second connecting module is provided with at least two negative first connecting ends and at least two negative second connecting ends, the first connecting module is provided with two charging and discharging positive circuits, the second connecting module is provided with two charging and discharging negative circuits, two charging and discharging input and output circuits are formed, and the two charging and discharging input and output circuits are matched through the two charging and discharging positive circuits and the two charging and discharging negative circuits. Compared with an existing single-branch high-voltage box, the high-voltage box has the advantages that the cost of the existing high-voltage box can be reduced, two paths of charging and discharging input and output can be considered, the arrangement space can be saved, and the space utilization rate can be improved.

The invention discloses a middle friction type double-acting-force self-adaptive variable-speed electric driving system which has all the advantages of a double-acting-force self-adaptive variable-speed electric driving system, a node of slow-gear return power of the structure is located near the axial middle of an inner ring of a clutch and is the same as the position acting on a second group of elastic pieces, the response sensitivity is improved, and the service life of the system is prolonged. The structure is simple and compact, jamming and time delay in the gear shifting process are further avoided, gear shifting of a speed change system is sensitive, and pause is avoided; meanwhile, the slow-gear traction force return position is located near the axial middle of the driven part, when resistance is increased, the separation process of the clutch is achieved by compressing all the elastic assemblies instead of releasing a set of elastic assemblies, and therefore separation of the clutch is fast, and the problem that the efficiency is reduced due to redundant friction is solved.