160results about How to "Not easy to get hot" patented technology

The invention relates to a light bioreactor for culturing microalgae systematically, which comprises an in-parallel pipe group, a control valve, a pH value sensor, a temperature sensor, a light sensor, a water mist sprayer, a liquid level alarm, a pipe pump, an air inlet pipe, an exhaust pipe, a feed pipe, a discharge pipe, a microporous pipe, a liquid storage tank, a cool and heat exchanger, a control panel, a bracket, a lighting facility and the like, wherein the pipe group and the valve are effectively connected in a close way, specific surface area is enlarged simultaneously when the volume of microalgae is enlarged during culturing, and the invention has small ground occupation, effectively uses stereo space and has sufficient air exchange, and utilization rate is increased; during culturing, the invention monitors parameters such as temperature, pH value, concentration of a culture medium, lighting intensity, and the like in real time, provides the best condition for microalgae growth and metabolism, effectively reduces culturing time, avoids danger of outside harmful creatures, and decreases production cost. The bioreactor can be used for culturing microalgae cells in a continuous or semi-continuous way and producing microalgae protein, biodiesel or aquatic baits and other products.

The invention relates to a side-pole multi-voltage nickel-metal hybrid battery module, which belongs to the technical field of batteries. The side-pole multi-voltage nickel-metal hybrid battery module comprises cells (5) which are fixed in a battery module shell (1), wherein a plurality of partition plates (2) are vertically arranged in the inner cavity of the battery module shell (1), the inner cavity of the battery module shell (1) is divided into a plurality of single battery cavities (3) which are sealed to one another, one cell (5) is encapsulated in each single battery cavity (3), each partition plate (2) is fixedly provided with a conductive pole (4), the cells (5) are connected with one another in series through the conductive poles (4), the cells (5) on two ends of the battery module shell (1) respectively penetrate through a positive pole (6) and a negative pole (7) of the battery module shell (1). The plurality of cells are connected with one another in series through the conductive poles, so that the cells are directly connected together inside the battery module shell, and the weight of the batter module is reduced. The side-pole multi-voltage nickel-metal hybrid battery module has the advantages of high capacity ratio, low cost, safety in use, long service life and the like.

The invention discloses a full-automatic chemiluminiscence tester and belongs to the field of chemiluminiscence testing.The full-automatic chemiluminiscence tester comprises a mechanical arm module, a refrigeration module, a power module, a reagent sample disk, a sampling needle component, a stirring component, a reaction cup frame, an incubation device, a magnetic separation component, a washing station component and a measuring room.Full-automatic management is achieved for mixing, reacting, incubating, magnetic separating, detecting and other procedures of a sample to be tested, the detection efficiency is improved, and operation errors are reduced.

The invention provides a method for preparing lithium battery graphite cathode slurry. The steps of thickener solution preparing, powder dispersing, high-viscosity stirring, low-viscosity stirring, viscosity testing, vacuum defoaming and the like are conducted so that all the components of the slurry can be evenly dispersed within short time, uniformity of the prepared slurry is good, stability is excellent, the adhesive force of a battery pole piece prepared from the slurry is improved, and the consistency and the electrochemical performance of a battery are improved. The method has the advantages that the preparing time is short, equipment abrasion is little, energy consumption of production is low, and the dispersing effect is good. The lithium battery prepared through the lithium battery graphite cathode slurry is low in internal resistance, not prone to heating, high in energy density, good in circulation performance and long in service life.

The invention provides a preparation method for lithium iron phosphate cathode slurry. All constituents of the slurry are uniformly dispersed within a short time by steps of powder dispersion, high-viscosity stirring, low-viscosity stirring, viscosity tests, vacuum defoaming and the like. The prepared slurry is high in uniformity and excellent in stability, meanwhile, the adhesive strength of a battery pole piece prepared according to the method is improved, and thus, the consistency and the electrochemical performance of the battery are enhanced. The preparation method has the characteristics of short preparation time, low device abrasion, low production energy consumption, high dispersion effect and the like. A lithium battery prepared from the lithium iron phosphate cathode slurry provided by the invention has low internal resistance, is difficult to generate heat, and also has the advantages of high energy density, good cycle performance and long service lifetime.

The invention provides a preparation method for lithium titanate negative electrode slurry of a lithium battery. Through steps of preparing a thickening agent solution, dispersing powder, high viscosity stirring, low viscosity stirring, viscosity testing, vacuum defoaming and the like, components of the slurry are uniformly dispersed within a short time; the prepared slurry is high in uniformity and excellent in stability; and meanwhile, the adhesive power of the prepared battery pole piece is improved, and the consistency and the electrochemical performance of the battery are improved consequently. The preparation method has the advantages of short preparation time, low abrasion on equipment, low production energy consumption, good dispersion effect and the like. The lithium battery prepared from the lithium titanate negative electrode slurry prepared by the preparation method is low in internal resistance, low in possibility of generating heat, high in energy density, good in cycling performance, and long in service life.

The invention provides a preparation method for lithium cobalt oxide cathode slurry. By the steps of powder dispersion, high-viscosity stirring, low-viscosity stirring, viscosity test, vacuum defoaming and the like, all constituents of the slurry are uniformly dispersed in a short time, the prepared slurry is good in uniformity and excellent in stability, meanwhile, the adhesive of a battery pole piece prepared according to the method is enhanced, and thus, the consistency of a battery and the electrochemical performance of the battery are improved. The preparation method has the advantages of short preparation time, low equipment abrasion, low energy consumption in production, good dispersion and the like. A lithium battery prepared from the lithium cobalt oxide cathode slurry provided by the invention has the advantages of low inner resistance, difficulty in heat generation, high energy density, high cycle performance and long service life.

The invention relates to a single magnet type electric leakage protection socket, which adopts a single magnet type electromagnetic tripping device and a standard auxiliary circuit adaptive with the device. When the socket or a load end of the socket has faults such as electric leakage, or zero line disconnection or neutral line disconnection, the tripping device can automatically trip and cuts off a power supply under control of the auxiliary circuit, the tripping speed can be less than 25ms, and the threshold of an electric leakage current is less than 6mA. The electric leakage protection socket has complete safe protection functions, and a tripping mechanism makes contact points have large contact pressure and small contact resistance and not easy to emit heat. The breaking current capacity is large, and the tripping force can reach 2 to 3 times of that of a general electric leakage protector. A neutral line of a phase line cannot reset when reversely connected, and the phase line and the neutral line immediately trip or cannot reset after being disconnected, which has good function of protecting low-current domestic appliances. The electric leakage protection socket is the small-sized power supply socket with more reliable and stable operation.

The invention discloses a transmission switching device of an electric hammer, and the device comprises an intermediate shaft; an intermediate shaft gear, a transmission gear, swing rod bearings and an intermediate shaft sleeve are arranged on the intermediate shaft; a connecting part extends outwards from the transmission gear; the connecting part is sleeved on one end of the intermediate shaft sleeve; the swing rod bearings are respectively sleeved on the connecting part and the intermediate shaft sleeve; keyway matching structures are arranged between the other end of the intermediate shaft sleeve and the intermediate shaft, the connecting part and the swing rod bearings; a shift bearing is arranged on the peripheral side of the intermediate shaft sleeve; the inner ring of the shift bearing is the intermediate shaft sleeve, and a groove is arranged on the outer ring of the shift bearing; and a shifting mechanism is connected into the groove. The transmission switching device of the electric hammer has the beneficial effects that a transmission mechanism and the shifting mechanism stay still relatively, no friction, wear, heating or oil leakage occurs, the service life is long, the maintenance amount is small, the gear friction phenomenon is overcome, and the working efficiency is high.

The invention relates to a multifunctional fireproof overload protective plug base, which comprises over-current sensor on circuit board, zero-sequence inducer, test button, return button element, control circuit, electromagnetic release device, two couples of stable contactor and movable contactor relative to N and L poles, and one stable magnet fixed on frame. The invention uses dual-magnetic release method to switch the contactors, without mechanical abrasion and sliding condition. And it has high current divert ability and high sensitivity. It has overload protection and leakage protection functions.

The invention relates to an electronic atomizer. The electronic atomizer includes a shell assembly and an atomization assembly. The shell assembly includes a suction nozzle, a base and an outer sleeving pipe which is used for connecting the suction nozzle and the base; the atomization assembly includes an atomization hood, an atomization shell, a heating element and an atomization electrode. An air channel is formed between the atomization hood and the atomization shell, and an air inlet and the air channel are communicated in a conduction mode to form a first airflow channel. An atomization channel is formed inside the heating element, an air guide channel communicated with the atomization channel is formed in an atomization electrode, and the air inlet, the air guide channel and the atomization channel are communicated in a conduction mode to form a second airflow channel. Air in the first airflow channel and air in the second airflow channel are used for cooling the heating elementfrom the inner and outer sides of the atomization shell respectively and take away heat produced by heating and atomization of the heating element, the effect of reducing the temperature of the wholeatomization assembly is achieved, and the electronic atomizer does not easily get hot even though used at high power for a long time.

The invention relates to a transmission for electric vehicles, belongs to the technical field of power transmission for electric vehicles and realizes that different speed and torque can be output on the condition of the same revolution speed of a motor. The transmission for electric vehicles comprises a case, a motor is arranged in the case and provided with a motor shaft, the motor shaft is in transmission coupling with a spindle, a drive gear is fixed on the spindle, a second-gear drive gear is in meshing transmission with an output gear sleeved on an output shaft, flutes are machined on the spindle, a slider is connected with the second-gear drive gear under action of the flutes when in rotation of the spindle, the second-gear drive gear meshes with the output gear to drive the output shaft to rotate, and a first-gear drive gear drives a first-gear output gear through a reversing gear so as to drive the output shaft to rotate.

The invention discloses a new energy power device, in particular to a fluid pressure converted energy intermittent collection cylinder which comprises a cylinder body, a piston, a water inlet valve, a water discharge valve, a control device capable of being well started and stopped fast, and a structure with a moisture pressure converter and an additional output pressure adjusting device, and can additionally provide a transmission platform for stable operation and subsequent water surface work. The fluid pressure converted energy intermittent collection cylinder adopts the different pressure causes and the characteristic of various fluids for mutual conversion, so as to convert static water pressure energy into gas pressure, solid potential energy pressure, or gas pressure and solid potential energy pressure. The piston and the cylinder body cooperate to convert water pressure into gas pressure, solid potential energy pressure, or gas pressure and solid potential energy pressure; and a moisture pressure converter and an additional output pressure adjusting structure is used for controlling the pressure of output jet water flow and outputting power for work. The adoption of the water inlet valve, the water discharge valve and the control device capable of being well started and stopped fast ensures that the fluid pressure converted energy intermittent collection cylinder can work intermittently. A buoyancy support saddle is adopted to ensure the stable working state of the fluid pressure converted energy intermittent collection cylinder and provide a transmission platform for subsequent water surface work.

The invention discloses a reflective constant-volume incendiary bomb high-speed camera schlieren system capable of correcting chromatic aberration, which comprises a light source, an optical fiber, a condenser lens group, a slit device, a first reflector, a collimating mirror, a constant-volume Incendiary bomb, schlieren mirror, second reflector, knife edge and high-speed camera, the optical input end of the optical fiber is connected to the light source, the optical output end of the optical fiber is connected to the condenser lens group, and the focus of the condenser lens group is connected to the collimating lens The focal points reflected by the first reflecting mirror coincide at the slit device, and the knife edge is located at the focal point of the schlieren mirror reflected by the second reflecting mirror. The present invention adopts the condenser lens group to improve the existing condenser lens, and corrects the chromatic aberration produced by the polychromatic light after passing through the lens, so that the real spherical flame propagation photos in the constant-volume incendiary bomb can be obtained more accurately.

The invention discloses a dust-proof and waterproof computer case which is easy to maintain. It comprises a casing, a control panel, a mounting plate and a sealing plate. There is a mounting plate on the surface, and the mounting plate is in the shape of a rectangular frame. The inner end of the rectangular frame of the mounting plate is fixed with an inner guard plate and an outer guard plate. In this device, the sealing plate on the shell is directly engaged in the card slot. , and the contact surface between the sealing plate and the card slot is provided with a gasket to prevent dust. Fine dust will not enter the chassis through the gap between the sealing plate and the card slot. It has a protective effect and is not easy to be touched by the human body. After a long time of use, the sealing plate is not easy to appear concave or convex, so that the sealing plate and the card slot always maintain a good seal, and the waterproof and dustproof performance is good. It is suitable for promote.

The invention belongs to the technical field of power supply and power generation, in particular to a self-circulating magnetic suspension flywheel energy storage generator. The invention aims at thesmall energy storage, low speed and high noise, easy to heat, low transmission benefit existing in the existing flywheel energy storage power generation device, , The invention provides a self-circulating magnetic levitation flywheel energy storage generator which can eliminate or reduce the noise, heat and other phenomena when the flywheel power generation machine is running, greatly increase theflywheel speed and reduce the friction force, improve the working efficiency of the power generation machine, and realize the self-circulating magnetic levitation flywheel energy storage generator which can continuously generate electric energy. The invention comprises a housing, a driving mechanism, a magnetic levitation structure, an iron core, an output coil, a self-circulating coil and a rotor, wherein the driving mechanism comprises a driving mechanism stator, a driving mechanism rotor and a flywheel, and the flywheel is suspended by the magnetic levitation structure. The invention has the characteristics of large energy storage, high rotational speed, low noise, not easy to heat, high transmission efficiency and continuous generation of electric energy.

A disclosed sofa comprises a soft body; the sofa body comprises a seat and a backrest; the soft body is provided with a water bag; the bottom part of the water bag is fixedly connected with the soft body, and the top part of the water bag is provided with a water injection port and an air vent; the water bag comprises an upper water bag and a lower water bag which form an integrally-communicated structure; and the bottom part of the upper water bag is fixedly connected with the backrest of the soft body, and the bottom part of the lower water bag is fixedly connected with the seat of the soft body. The soft does not easily generate heat, and is low in cost and simple and convenient to clean and maintain.

An ultra high voltage regulator for converting includes a rectifying circuit, a first transistor, a second transistor, an output capacitor, a first resistor, a second resistor, and a third resistor. The ultra high voltage regulator converts a received alternative current into a direct voltage to an electrical component. The ultra high voltage regulator capable of providing a larger current becomes more compact and thinner in size without cooperating with a mass transformer / high voltage capacitor, which satisfies the request for miniaturization of the electrical components.

The invention provides an electromagnetic heating fusion welding fixture for steel-plastic composite pipe. The electromagnetic heating fusion welding fixture comprises an annular housing, a handle connected with the lower part of the annular housing, a magnet exciting coil and an electromagnetic heating control circuit; the magnet exciting coil and the electromagnetic heating control circuit are fixed in the annular housing; the magnet exciting coil is electrically connected with the electromagnetic heating control circuit through a wire; the annular housing comprises a first semicircular housing part and a second semicircular housing part; one end of the first semicircular housing part is connected with one end of the second semicircular housing part in a hinged manner; the other end of the first semicircular housing part is connected with the other end of the second semicircular housing part through a first locking mechanism in a closed manner; the magnet exciting coil of the electromagnetic heating fusion welding fixture comprises a litz wire fixed to the inner wall of the annular housing; and the two ends of the litz wire are connected with a first contact connecting piece and a second contact connecting piece respectively. According to the electromagnetic heating fusion welding fixture by the inventor, after the conventional semicircular metal body is replaced by the litz wire to act as the magnet exciting coil, the electromagnetic heating permeability is good, the electromagnetic heating fusion welding fixture is not prone to heat and can be continuously used, and an alternating magnetic field generated around the electromagnetic heating fusion welding fixture is uniform.

The invention discloses a pneumatic reversing valve, comprising a valve body, a cylinder and a core shaft, wherein the valve body is fixedly connected with the cylinder; the core shaft is arranged in a sliding valve hole for communicating the valve body with the cylinder in a sliding manner, and is provided with a return spring; an oil return cavity, an oil discharging cavity and an oil feeding cavity as well as an oil return port, an oil outlet and an oil inlet corresponding to the oil return cavity, the oil discharging cavity and the oil feeding cavity respectively are formed between the core shaft and the valve body; the core shaft divides the cylinder into two gas chambers by a piston arranged at the end part of the core shaft, and is respectively and correspondingly provided with a lifting port and a falling port; and the end part of the piston in the cylinder is provided with a slow-falling piston, and the gas chamber formed by the slow-falling piston and the end part of the cylinder is provided with a slow-falling port. The reversing valve and a pump are fixedly connected into a whole by a fixedly-connected bolt; the oil return port of the reversing valve is communicated with an oil feeding pipe of the pump; an oil outlet of the pump is communicated with the oil inlet of the reversing valve by a connecting pipe; the oil outlet of the reversing valve is connected with an oil inlet of an oil cylinder by a high-pressure oil pipe; and the pump is connected with a hydraulic oil tank by an oil pipe. According to the pneumatic reversing valve, the volume is small, the weight is light, and the service life is long.

The invention provides a terminal which comprises a shell and a PCB (printed circuit board) arranged in the shell, and the PCB is arranged in the middle of the shell. The terminal also comprises two battery cells which are arranged in the shell, distributed at two sides of the PCB and are close to the PCB; and a heat conduction part which is arranged in the shell, of which the middle part is connected to the PCB, and the two ends extend to the areas of the battery cells respectively. According to the terminal in the invention, the PCB is arranged in the middle of the shell; the double batterycells are arranged at the two sides of the PCB, and the heat conducting part is arranged between the PCB and the double battery cores. When the terminal is used, the heating value of the battery cellsis far lower than that of the PCB, so that the battery cells are cold areas relative to the PCB, the heat generated by the PCB is conducted to the battery cell areas at the two sides through the heatconducting part, the hot accumulation of the PCB areas is avoided, it is guaranteed that the shell is not prone to scalding, the holding hand feeling is good, and the performance experience feeling of a user in the using process is guaranteed.

The invention belongs to the technical field of inductor technologies, and provides a common mode inductor and a manufacturing method thereof. The common mode inductor comprises a magnetizer, end polepieces and two winding coils; the two winding coils are wound by flat wires, direct current resistance is reduced, the common mode inductor is not prone to heating when currents pass accordingly, rated currents of the common mode inductor are improved, and the requirements of low direct current resistance and the high rated currents of the inductor are met; leading-out terminals of the two winding coils and the end pole pieces are welded, the winding coils are wrapped with the magnetizer, the magnetizer and the winding coils are integrally formed, and the common mode inductor is high in strength and impact resistance capacity accordingly; the end pole pieces extend outside the magnetizer and form electrodes of the common mode inductor, and when the certain magnetic conductivity of the magnetizer is guaranteed, the temperature coefficient can be 180 DEG C, and the common mode inductor can work at the high temperature or the low temperature accordingly; the problems that an existing common mode inductor is poor in vibration resistance capacity and impact resistance capacity and cannot work in the high-temperature state are solved.

The invention discloses an internal-expanding-type tubular busbar intermediate joint which is formed by an intermediate joint, expansion joints, a double-end screw rod, a turbine and a worm. The two ends of the intermediate joint are internally provided with the expansion joints respectively; the two ends of the double-end screw rod are engaged with center threaded holes of the expansion joints respectively; the middle portion of the double-end screw rod is fixedly connected with the turbine; the thread in the worm is engaged with the turbine; the inner wall aperture of the intermediate joint is of a gradually-changing structure, and dimension of the aperture close to the two ends is larger than that the dimension of the middle aperture; and each expansion joint is of a cone structure, and cross section diameter close to the port portion is larger than the cross section diameter close to the double-end screw rod portion. The inner wall aperture of the intermediate joint is designed to be in the gradually-changing structure, so that when the expansion joints expand, the contact area between the expansion joints and the inner wall of the intermediate joint is increased, better conductivity is achieved, and heat is not easy to accumulated; and meanwhile, the stress is large in the span installation process, and thus the joint portion does not sink.

The invention discloses a wave energy and wind energy device. The device comprises a Venturi tube booster cover, a slide valve, a water-gas pressure conversion working chamber, fluid compression chambers, an inlet and drainage fluid check ball valve, piston resetting springs of the fluid compression chambers and various unidirectional and bidirectional fluid energy booster collectors capable of additionally using structures which passively or actively accept energy of various energy state fluids. The Venturi effect of a single-faced or double-faced Venturi tube booster cover pressurizes various energy state fluids entering a throat tube and drives the fluid compression chambers on the two ends of a pipeline to work. When the slide valve slides, the throat tube inlet is opened and the channel of a throat tube outlet is blocked; and the channel for communicating the inlet throat tube and a water-gas cylinder is opened. The water-gas pressure conversion working chamber and the fluid compression chambers convert various energy state fluid pressures into compressed air. The inlet and drainage fluid check ball valve and the piston resetting springs of the fluid compression chambers facilitate the fluid compression chambers to supply the fluids. Various energy structures capable of being additionally used and passively or actively accepting various energy state fluids expand the use range of the collector.

The invention relates to a driving device for implementing compound motion output for an electric driven tool, comprising rocker, compound motion piece, element piece and sliding piece, where the sliding piece is installed on the runner of a guiding piece, the compound motion piece is installed on the sliding piece through the elastic piece, the rocker is hinged on a machine frame on one side of the compound motion through hinge shaft and one end of the rocker contacts with A end of the compound motion piece and the other end is provided with an inclined rod which forms an included angle alpha with the moving direction of the sliding and contacts with B end of the compound motion through the inclined rod. The invention needs no other mechanism to provide action force and its structure is simple and contact; and it is especially applied to the occasion of superposing rocking motion output to high frequency reciprocating linear motion.

The invention discloses a piezoelectric transformer with an arch structure, in particular a novel sandwich type multi-drive and multi-output piezoelectric transformer. The piezoelectric transformer comprises drive end piezoelectric patches and output end piezoelectric patches which work in a transverse vibration mode; the piezoelectric transformer is formed by overlaying the drive end piezoelectric patches and the output end piezoelectric patches; and at least one part of the drive end piezoelectric patches or the output end piezoelectric patches has an arch structure. Unlike the prior art, the piezoelectric transformer consists of the arc piezoelectric patches which facilitate the welding of electrodes and the positioning and improve the firmness and reliability. The upper and lower surfaces of each piezoelectric patch are coated with metal plane electrodes; and the sides of the arch shape are covered with side electrodes which are connected with the surface electrodes respectively, and are polarized in the thickness direction. Outer conducting wires are directly led out through the side electrodes; and all layers of the piezoelectric patches are connected in parallel, so the structure is simple and reasonable.

The invention discloses an indoor high-voltage isolating switch static contact comprising a plurality of pairs of contact fingers and magnetic lock plates, wherein the contact fingers share a contact seat and are abreast arranged at both sides of screw rods; and the magnetic lock plates are positioned at the outer sides of the contact fingers. The indoor high-voltage isolating switch static contact is characterized in that the plurality of pairs of abreast arranged contact fingers are integral type flat bottom U-shaped pieces; when specific construction is carried out, clamp plates are arranged on the outer wall of the flat bottom U-shaped pieces in closed mode; and the clamp plates and the flat bottom U-shaped pieces are fastened on the contact seat together by fastening pieces. In the indoor high-voltage isolating switch static contact, innovative improvements are made aiming at the problems that crimp connection is adopted by the contact fingers and the contact seat of the existing static contact, processing and assembly requirements are high, the size and the precision of chamfering of orifice edge is difficult to control and the resistance of contact surface is easy to be large. With the adoption of the contact fingers with the structure of the integral type flat bottom U-shaped pieces and the technical scheme that the contact seat and the contact fingers are directly connected by the fastening pieces, the problem caused by contact of the spherical surface and an orifice edge line in the prior art is solved, and the purposes of reliable contact, low contact resistance, difficult heating and the like are achieved so that a product is suitable for operation in a site the rated current of which is larger than 4000A.

The invention discloses a valve rocker for an automobile engine. The valve rocker comprises a rocker body which is provided with a shaft hole in clearance fit with a main shaft, one end of the rocker body is provided with an ejector rod used for ejecting a valve lifer and adjusting valve clearance, the other end of the rocker body is provided with a roller used for making contact with an engine crankshaft cam, the ejector rod is in threaded connection with a threaded hole in one end of the rocker body, a bulb is arranged at the lower end of the ejector rod and provided with a cushion block, the upper end face of the cushion block is provided with an inwards-concave arc surface with the shape and the size matched with those of the surface of the bulb, a connecting frame is arranged between the cushion block and the lower end of the ejector rod, the lower end of the ejector rod is sleeved with the upper end of the connecting frame in a sliding mode, swing clearance exists between the upper end of the connecting frame and the lower end of the ejector rod, and the lower end of the connecting frame is connected with the outer side wall of the cushion block. The valve rocker for the automobile engine is not prone to abrasion, long in service life and low in noise and makes contact with the valve lifter all the time.

The invention relates to a multiple-chip array type chip-on-board (COB) inversely-installed eutectic packaging structure and method. The multiple-chip array type COB inversely-installed eutectic packaging structure comprises a ceramic heat-radiating substrate, a fluorescent powder and silica gel mixed packaging layer and light-emitting diode (LED) chips, wherein an insulating layer is arranged on the upper surface of the ceramic heat-radiating substrate, a circuit conductor layer is arranged above the insulating layer, and multiple LED chip connecting units are installed on the upper side of the ceramic heat-radiating substrate. Each LED chip connecting unit consists of a bonding layer, an LED chip and a gold wire shared by thermo-sonic keys, wherein the positive pole ends of the chips are in eutectic bonding with the bonding layers and connected with the circuit conductor layer, and the negative pole ends of the LED chips are connected with one end of the circuit conductor layer on the front side of the substrate through the gold wires. The multiple-chip array type COB inversely-installed eutectic packaging structure and method has the advantages of being excellent in heat-radiating effect and capable of avoiding the problems including chip defects or reduced luminous efficiency and the like caused by the different expansion degree of the chip and the substrate with heat, facilitating wire arrangement, reducing bonding temperature, improving the reliability performance and solving the problems of false welding and unsoldering of wires.

The invention belongs to the technical field of power drive of electric vehicles, and aims to achieve the goal that a motor is capable of outputting different vehicle speed and different torques at the same rotate speed. The invention provides a mechanical transmission of an electric vehicle, which comprises a box body; the box body is provided with a motor; the motor is provided with a motor shaft; the motor shaft is in drive connection with a main shaft; the main shaft is fixedly provided with a driving gear; the driving gear is in meshing drive with an output gear sheathed onto an output shaft; the output gear is capable of rotating on the output shaft; the output shaft is provided with a driven sleeve; the driven sleeve can be connected with the output gear to drive the output shaft to rotate together when moving on the output shaft; the driven sleeve is provided with a shifting fork; and the shifting fork is connected with a regulating stem which is used for driving the driven sleeve to slide on the output shaft and is in connection drive with the output gear.