147results about How to "Adjust speed" patented technology

The invention discloses an air conditioner indoor unit. The air conditioner indoor unit comprises a base, a mounting shell, a back plate, a front panel, a lower volute fan assembly, an upper volute fan assembly and an evaporator assembly, wherein the base, the mounting shell, the back plate and the front panel define an accommodating space; the lower volute fan assembly is arranged inside the accommodating space and comprises a lower fan, a first volute and a second volute, and a lower air duct is defined between the first volute and the second volute; the upper volute fan assembly is arranged above the lower volute fan assembly and comprises an upper fan, a first upper volute and a second upper volute, and an upper air duct is defined between the first upper volute and the second upper volute; the evaporator assembly is arranged inside the accommodating space and is constructed in a mode that after the evaporator assembly exchanges heat with air entering the accommodating space from a return air inlet of the back plate, the air is guided respectively by the upper fan and the lower fan to enter the lower air duct and the upper air duct. The upward-downward air supply double cross-flow air conditioner indoor unit is high in heating efficiency and low in energy consumption and use costs.

The invention provides a hydraulic reel-pipe control system, comprising a first reel-pipe motor, a first reel, a second reel-pipe motor, a second reel, a pressure oil source, a reel-pipe control valve group, a detection unit and a controller, wherein the first reel-pipe motor is connected to the first reel; the second reel-pipe motor is connected to the second reel; pressure oil provided by the pressure oil source is introduced to the P opening of the reel-pipe control valve group through an inlet oil way; the T opening of the reel-pipe control valve group is communicated with an oil return way; the first working opening of the reel-pipe control valve group is connected with the first oil inlet of the first reel-pipe motor and the second oil inlet of the second reel-pipe motor; the second working opening of the reel-pipe control valve group is connected with the second oil inlet of the first reel-pipe motor and the first oil inlet of the second reel-pipe motor; the reel-pipe control valve group is used for regulating a pressure of the pressure oil output from the first working opening and the second working opening according to an electric signal of the controller; the detection unit is used for detecting depth variation data of a working device; and the controller is used for generating the electric signal for controlling the reel-pipe control valve group according to the depth variation data. The pressure of a reel-pipe changes proportionally as the lowering depth increases. The invention further provides a continuous wall grab bucket and a chambering drilling machine.

The invention provides a compensation method for roadbed settlement, which comprises the steps that: when in a roadbed construction process, on a road section which can easily settle and deform after being open to traffic, when a roadbed is filled to a height which is 30cm to 200cm from the top surface, retaining walls are built on both sides of the roadbed; bagged lime is uniformly paved on the inner sides of the retaining walls within the full-width range of the roadbed on different layers; a rubber pipe is pre-reserved on each lime bag to the outer side of the roadbed as a water injection channel in a later period; the bottom surfaces of the retaining walls are 20cm to 100cm lower than the bottom surfaces which are paved from the bagged lime, and the top surfaces of the retaining wallsare in alignment with the top surface of the roadbed; and when the roadbed settles, the water is injected into the lime bags through the pre-reserved rubber pipe, the lime absorbs the water, swells and jacks a road surface structure up. The compensation method for roadbed settlement completes the water injection on the outer side of the roadbed, has a short construction time, does not interrupt the traffic during the construction process and has little interference to the traffic; and the construction is not restricted by the weather and the environment, the settlement can be handled at any time when being found, and the construction process is controllable.

The invention relates to a cleaning device, in particular to an effective cleaning device of a rare earth excavator. The effective cleaning device has high cleaning effect and comprises a brush, a rotary motor, a first connecting rod, a first sliding bush, a fixed plate, a slide shaft, an oscillating rod, a brace, a supporting rod, vanes, a cart, a stand, a box, a first hose, a water pump, a first rotating shaft, a first bearing block, a support, a first bevel gear, a second bevel gear, a second rotating shaft, a second bearing block and the like. The fixed plate, the brace, the supporting rod, the stand and the support are sequentially arranged on the top of the cart from left to right. The cleaning device has high cleaning effect. With a first gear and a rack arranged, the rotary motor rotates to drive the oscillating rod to oscillate up and down so as to drive the brush to clean the rare earth excavator.

The invention discloses a single-phase reluctance generator which comprises a stator and a rotor in projecting magnetic pole structures by stacking silicon-steel sheets. Stator magnetic poles are provided with concentrated armature windings which are connected in series or parallel into a group according to the N polarity and the S polarity of the armature windings; rotary magnetic poles arranged on the rotor has the same number as the magnetic pole number of the stator and comprise winding excitation magnetic poles or permanent-magnet magnetic poles and permanent-magnet excitation mixed magnetic poles; magnetic pole windings adjacent to the rotor are connected in series or parallel to form a plurality of N groups and S groups; and the stator poles and the rotor poles consist of 2-stage poles, 4-stage poles, or even n-stage poles, namely even poles or pair poles, respectively comprise different stage poles and have the same total pair poles. The invention adopts a stator isopolar technology so that the rotor can adopt different modes, such as the excitation magnetic poles, the permanent-magnet magnetic poles and the mixed magnetic poles of the permanent-magnet magnetic poles and the electric excitation magnetic poles, and the stator windings can be simultaneously utilized; the dynamic combination of the windings connected in series or parallel facilitates the adjustment of an output voltage, improves the utilization rate of the windings, enhances the power density of the generator and improves the performance and the efficiency of the generator.

The invention relates to an electric hand-held power tool (2). Said compact and easy to handle hand-held power tool (2) comprises an electric drive motor (6), a tool holder (18) that is rotationally driven by said drive motor (6) via a drive mechanism (12, 16) and that is configured in order to accommodate a tool (46, 48, 50) suitable for hammer drilling or hammering, or a tool (46, 48, 50) suitable for rotatingly drilling or a tool (46, 48, 50) suitable for screwing, in addition to a pneumatic percussion mechanism (20) for applying strikes onto a tool (46) inserted into the tool holder (18). According to the invention, the tool holder (18) includes a shank portion (52, 54) for the tool (46, 48, 50) and a holding sleeve (68) with the two end portions thereof to be opened. The inner circumferential surface (88) of the holding sleeve (68) is provided with at least eight planar circumferential surface sections (88n, 88o, 88p, 88q, 88r, 88s, 88t, 88u) in the circumferential direction. Each pair of adjacent circumferential surface sections (88n, 88o, 88p, 88q, 88r, 88s, 88t, 88u) form an angle of 120 degrees.

Continuous production equipment for polyurethane insulation board cement-based coils comprises a mesh conveying mechanism, a conveying belt and conveying belt conveying roller way, a drying mechanism, a conveying belt and coil separation mechanism, a cloth storage mechanism, an edge-cutting cutting mechanism and a winding mechanism. A mesh guide-in roller is disposed at the front end of the conveying belt conveying roller way. A coating mechanism is disposed on a conveying belt conveying roller way and behind the mesh guide-in roller, a distribution device is disposed above the coating mechanism, and the conveying belt conveying roller is disposed inside the drying mechanism and behind the coating mechanism. The mesh conveying mechanism comprises a mesh unwinder, a mesh joint platform and a mesh rectification tension device. A coil deviation adjusting mechanism is disposed between the cloth storage mechanism and the edge-cutting cutting mechanism. Steam is used for drying, heat exchange efficiency is high, a cloth storage mechanism is disposed on a production line, coil cloth can be stably and evenly winded and stored, continuous production of the production line after the coil is cut off and a core is replaced is guaranteed, and coil production efficiency can be improved greatly.

A variable air gap vortex flow speed regulating induction motor can achieve the aim of transmitting torque from an electric motor to a load by the interaction of air gap field between an electrical conductor and a winding. The variable air gap vortex flow speed regulating induction motor comprises a stator, a rotor, an air gap regulating component and the like, and is characterized in that the stator (1) comprises an iron core and the winding, wherein, the iron core is fixed on an end cover (6); the rotor includes a copper disc (2) and a back yoke (3), and is fixed on an output rotating shaft (4) which can change the air gap distance between the stator (1) and the copper disc (2) by the air gap regulating component (5); the motor adopts a disc structure, and the intensity of the air gap field can be conveniently regulated by regulating the air gap regulating component on the output rotating shaft, thus achieving the aim of regulating the rotating speed and the torque of the motor and leading the motor to start at underload and operate at full load.

The invention discloses an undercarriage faulty airplane safe landing gear. The undercarriage faulty airplane safe landing gear comprises a landing plate provided with a traction mechanism and a sliding mechanism arranged below the landing plate. An elastic steel sheet with the M-shaped cross section is arranged on the upper portion of the landing plate. A flexible energy relief layer is arranged on the elastic steel sheet. A compensation air bag is arranged in a cavity between the landing plate and the elastic steel sheet. An airplane position automatic correction device is arranged in a concave position in the middle of the elastic steel sheet. The undercarriage faulty airplane safe landing gear has the advantages of being high in anti-seismic buffering capacity, capable of accurately and conveniently conducting positioning, flexible and adjustable in airplane landing position, low in cost, and capable of being popularized and applied conveniently.

The invention discloses a feed feeding vehicle which comprises a vehicle frame, wherein a seat is arranged at the front part of the vehicle frame; a walking motor is arranged at the lower part of the seat; the walking motor is connected with a direct current supply; a box body is arranged on the vehicle frame at the back part of the seat; a discharge outlet of the box body is formed in the back end of the box body; a transporting auger shaft is arranged at the lower part of the inner chamber of the box body; the front end of the auger shaft extends out of the front wall of the box body; the back end of the auger shaft extends out of the back wall of the box body from the discharge outlet of the box body; the front end of the auger shaft is supported on the vehicle frame; an auger driving direct current motor is arranged on a chassis of the vehicle frame below the seat, is in electric connection with the direct current supply, and transmits power to the auger shaft; a discharging device is arranged on the auger shaft at the back end of the box body; a feed inlet of a discharging pipe is formed in the lower end of the discharging pipe of the discharging device and near one side of the back wall of the box body; the feed inlet of the discharging pipe is connected with the discharge outlet of the box body; a discharge outlet of the discharging pipe is formed in the upper end of the discharging pipe; a feed lifting transportation mechanism is arranged in the discharging pipe. The feed feeding vehicle is particularly suitable for transporting feed, with relatively small space, of small-scale feeding farms.

The invention relates to an environmentally-friendly cross-linked acrylate polymer emulsion and a preparation method thereof. The emulsion consists of six main components through semicontinuous seeded emulsion polymerization, is fine and smooth in appearance and is a blue-fluorescent semitransparent emulsion, a pH value is 7.5+/-0.5, the solid content is 30-50%, the emulsion particle diameter is 50-100 nanometers, and the polymer emulsion has good film-forming property and adhesion after film forming at the 80 DEG C temperature. The environmentally-friendly cross-linked acrylate polymer emulsion has the advantages that due to the fact that an amino acid based anionic surface active agent and an alkyl polyglucoside non-ionic surface active agent both have excellent biodegradability and environmental protection effect and are used for replacing commonly-used alkylphenol polyoxyethylene ether and an alkylbenzene sulfonate surface active agent having poor biodegradability, the environmentally-friendly cross-linked acrylate polymer emulsion is more environmentally-friendly, and the demand for the performances of the emulsion is met.

The invention discloses a spray and dust removal device for workshop, comprising a chassis, a spray head, a water delivery hose and a load-bearing device. An adjustment knob is arranged on the upper side of the case, and the adjustment knob and the fan are both electrically connected with a controller. The controller is arranged in the middle of the case, the fan is connected with one end of the air supply hose, the other end of the air supply hose is connected with the nozzle, the outside of the nozzle is connected with the nozzle, and the nozzle of the nozzle is connected. The inner wall of the middle part is connected with a fan blade through a bracket, one end of the water delivery hose leads to the inner right side of the nozzle, the other end of the water delivery hose leads to a water tank, and the upper right side of the water tank is provided with a box port, The lower part of the chassis is connected with a load-bearing device. In general, the present invention has a simple structure, can flexibly adjust the spray speed and water supply, and is suitable for use in large workshops and other dusty occasions.

The invention discloses an electronic power converter. The converter comprises a transmission mechanism and a double-fed motor, the left end of the transmission mechanism is connected with a wind machine through rotating shafts, the output end of the transmission mechanism is connected with the double-fed motor through control wires, and the signal end of the double-fed motor is connected to power grids through power windings, wherein the output end of the double-fed motor is connected with PWM rectifiers through control windings, and the PWM rectifiers are connected with the power grids in a series-parallel connection structure; the double-fed motor adopts a wound-rotor asynchronous generator and is provided with stator windings on the left end, the right end of the double-fed motor is connected with resistors and stabilivolts through the stator windings separately, and the control ends of the stabilivolts are in parallel connection with the rectifiers, so that the volume of a relative total-power converter is greatly reduced, the reliability of system operation is improved, and the technical scheme of the electronic power converter can serve as an optimum proposal for variable-speed constant-frequency power generation in wind power generation.

The invention relates to a precisely controlled intelligent four-rotor unmanned aerial vehicle. The precisely controlled intelligent four-rotor unmanned aerial vehicle comprises a deflection measuring mechanism and a plurality of flight units; the deflection measuring mechanism comprises a light reflecting plate and a deflection measuring assembly; the deflection measuring assembly comprises a driving unit, a moving block, a hinge block, a rotating rod, a sleeve and a first photoelectric sensor; each flight unit comprises an auxiliary speed measurement unit on a side rod and a speed reducing unit on a first driving shaft; each auxiliary speed measurement unit comprises a supporting rod, a resistance rod, a transverse rod and a second photoelectric sensor; according to the precisely controlled intelligent four-rotor unmanned aerial vehicle, the inclination degree of an unmanned aerial vehicle is accurately controlled through the deflection measuring mechanism, the rotating speed of the first driving shaft in each flight unit is detected through the corresponding auxiliary speed measurement unit, and a speed is reduced to different degrees by utilizing the speed reducing unit, so that each flight unit is regulated to keep the unmanned aerial vehicle horizontal; the wind strength in each direction is detected through a wind detecting unit; the rotating speed of paddles in each flight unit is regulated again; therefore, precise operation of the unmanned aerial vehicle is realized.

The invention relates to a controller, in particular to a controller with an efficient cleaning device. The controller with the efficient cleaning device is thorough in cleaning and high in cleaning efficiency and practicality and comprises a connecting rod, a disc, a large belt wheel, a flat belt, a small belt wheel, a first gear, a second gear, a first slide rail, first slide blocks, a first gear rack, a first connecting rod, a second slide rail, second slide blocks, a slide shaft, a telescopic block, a thumb cylinder, a controller body, a second connecting rod, cleaning cloth, a hairbrush, a box body, a lifting rod, a cylinder body, a piston and a first motor. The first motor and the second gear are connected to the top of the interior of the box body. According to the controller with the efficient cleaning device, the effects of thorough cleaning and high cleaning efficiency and practicality are achieved, the problem that the controller is inconvenient to clean is solved, and the practicality is high.

The invention discloses a disc type tool changer system of a horizontal numerical-control boring and milling machine. The disc type tool changer system comprises a rotary tool storage disc and a tool changing claw. A plurality of tool installation bases are arranged on the tool storage disc. The tool storage disc drives the tool installation bases to rotate so that all the different tool installation bases can rotate to a tool changing position in a disc type tool changer system shell, and thus tool replacement, dismounting and mounting are facilitated. The tool installation bases can rotate by 90 degrees on the tool storage disc so that the tool changing claw can firmly grab a tool for tool changing work. The tool changing claw is controlled by a tool changing motor to rotate, and a tool changing spindle on the tool changing motor can stretch outwards so as to drive the tool firmly grabbed by the tool changing claw to stretch outwards or retract, and thus the tool is pulled out of or embedded in a spindle or the corresponding tool installation base. In addition, the horizontal numerical-control boring and milling machine further comprises a spindle system and a feeding system. The spindle is controlled through the spindle system to rotate, and feeding of the spindle is controlled through the feeding system.

The invention belongs to the field of aero-engine tests, and particularly discloses an aero-engine low-pressure turbine rotor and stator blade rub-impact test bench. The bench comprises a sliding system, a driving system, a stator system and a rotor system, wherein a sliding platform of the sliding system is arranged above a guide rail and is fixed by a limiting cable; a motor and a detachable coupling of the driving system provide power for the rotor system and realize separation of the rotor system; the stator system comprises two stator blades which are symmetrically arranged; a rotating shaft in the rotor system is fixed to the sliding platform, one end of the rotating shaft is connected with a motor through a detachable coupler, and the other end of the rotating shaft is connected with rotor blades arranged in the middle of stator blades. The problem that an existing aero-engine related overrun test bench cannot carry out a low-pressure turbine rotor and stator blade rub-impact test is solved, the defect that the test bench is single in function can be avoided, and the test bench has the advantages of being simple in structure, convenient to install, use and maintain and low in cost.

The invention discloses a vehicle and a power transmission system for the vehicle. The power transmission system comprises a differential device, two first electric generators, a first input shaft, a second input shaft, an output shaft, a synchronizer and a second electric generator, wherein two sides of the differential device are respectively connected with a half shaft; the two first electric generators are placed on two sides of the differential device; each first electric generator covers the corresponding half shaft; the two first electric generators are in cooperative transmission with a motor power output shaft; an engine can be joined with either the first input shaft or the second input shaft or both; the output shaft is in cooperative transmission with the first and second input shafts; the output shaft is covered with an output shaft output gear in transmission with the differential device; the synchronizer is mounted on the output shaft to join the output shaft output gear; and the second electric generator is in transmission with either the first input shaft, the second input shaft or the output shaft. Multi-driving modes can be achieved in the power transmission system; and the power transmission system has high integration degree and facilitates assembly system gravity center balance and arrangements of the half shafts.

The invention relates to the technical field of corn processing, in particular to an integrated corn kernel impurity removal and screening device. The device comprises a base, wherein a bracket tableis arranged at the top of the base, a screening frame is arranged above the bracket table, a screening driving mechanism is arranged at the top of the bracket table, and three screens are arranged inside the screening frame; an impurity removal channel is formed below each screen; a discharge port is formed in the bottom of each impurity removal channel; a discharge slideway is arranged below eachdischarge port; a fan is arranged on the side wall of each impurity removal channel; a synchronous driving mechanism is arranged on the side wall of the bracket table, and an impurity removal channelis arranged on one side, away from a synchronous driving assembly, of the bracket table; and a vertical plate is arranged at one end of the top of the base, and an opposite moving mechanism is arranged on the vertical plate, and comprises an opposite plate, and a feeding hopper is arranged on the opposite plate. The device can automatically classify corn kernels and remove impurities, and processing efficiency is improved.

The present invention relates to a movable lifting device comprising an auxiliary travel system capable of separately adjusting rotating force. Disclosed is a movable lifting device comprising an auxiliary travel system capable of adjusting rotating force, wherein the movable lifting device comprises: a base having a plurality of moving wheels; a lifting unit including a bed part on which a user lies, and an elevating frame which is coupled to the base and extends in an upward direction, wherein the elevating frame supports the bed part such that the bed part is located at a predetermined height or higher from the ground, and the elevating frame is arranged to selectively adjust the height of the bed part; an auxiliary travel unit including a driving wheel which is coupled to the base and which contacts the ground, and a driving motor for providing power to the driving wheel, the auxiliary travel unit selectively adjusting the rotating force of the driving wheel; and a control unit including a handle connected to the lifting unit so as to be gripped by a user, a sensor arranged on the handle to sense the working external force and transmit an electrical signal, and a control part for controlling whether to operate the driving wheel and rotating force of the driving wheel based on the electrical signal measured by the sensor.

The invention relates to a medical portable intelligent infusion or blood transfusion dripping speed controller, which is characterized in that a slot capable of being arranged in an elastic compression pipe of a pump infusion apparatus is arranged on one side of a frame; a synchronous belt pulley is arranged on a motor and connected with an eccentric synchronous belt pulley which is arranged on the frame through a synchronous belt for transmission; one side of the eccentric synchronous belt pulley is provided with an eccentric wheel I which is positioned inside a through opening of a pressure slider; and the pressure slider is arranged inside a guide chute on the frame, and one end of the pressure slider is extended with a convex mandril which is closely connected with the outer pipe wall of the elastic compression pipe of the pump infusion apparatus. The device has small volume, light weight, safe and convenient carrying and use and long working hours, can be used for 10 hours by charging once, can also realize suspension-free and random arrangement of an infusion bottle, sets the dripping speed as required, and achieves the aims of precise infusion and safe monitoring of infusion.

The invention discloses a flocculent waste removing device for a spinning workshop. The flocculent waste removing device for the spinning workshop includes a rectangular hollow shell, and a connectionplate structure integrated with the rectangular hollow shell is arranged at the bottom of the side face of the rectangular hollow shell. According to the flocculent waste removing device for the spinning workshop, due to the effect of a motor main shaft, a turbine rotates rapidly to form a negative pressure state; under the effect of air pressure, air continually flows in through a flexible pipeand an air flowing velocity control mechanism, and then the air enters liquid; due to the effect of air buoyancy force, the air rises, and when the air passes through a main filter plate, floccule inthe air can be filtered and then soaked in the liquid; besides, the flocculent waste removing device is provided with the air flowing velocity control mechanism which has the effects of adjusting thevelocity of air flowing and the amount of working air; due to the effect of a thread structure for the air flowing velocity control mechanism, the size of a gap between a valve plate for the air flowing velocity control mechanism and a central hole for the air flowing velocity control mechanism can be controlled, and then the amount of entered air and the velocity of air flowing are controlled.

A non-contact large-clearance magnetically driving method comprises an active magnetic pole and a driven magnetic pole. The active magnetic pole is a U-shaped iron core with fixed position. Each pole of the U-shaped iron core is respectively provided with two coils with electric power conducting controlled by a sequential circuit. The coils are controlled to switching and switching-off according to the prescribed sequence to lead to that the state of magnetic field of two magnetic poles is switched circulatingly according to the prescribed sequence to generate a magnetic field coupling with the driven magnetic poles (permanent magnets) which are arranged at the upper part of the U-shaped iron core of the active magnetic pole to drive the driven magnet (permanent magnet) to rotate. The invention has the advantages of simple technique, reasonable structure, fixed position of the active magnetic pole, large effective clearance between the active magnetic pole and the driven magnetic pole, adjustable rotating speed and direction, being able to replace the mechanical transmission and good practicability. The method of the invention can be applied to industrial practice and is especially suitable for driving the intracardiac miniature blood pump. The method of the invention settles the insufficiency for providing energy driving power to the intracorporal blood pump driving system currently.

The invention discloses a groove-type rare earth permanent magnet brushless motor, and relates to the technical field of brushless motors, in particular to a groove-type rare earth permanent magnet brushless motor which comprises a motor shell. A right side bearing support is fixedly installed on the right side in the motor shell, a ball bearing is fixedly installed in the middle of the right sidebearing support in a sleeving mode, and the middle of the ball bearing is fixedly sleeved with a driving shaft. According to the groove-type rare earth permanent magnet brushless motor, a micro controller controls a plurality of micro electric telescopic rods to drive a magnet rotor to move, and the effective contact length of the magnet rotor, a stator and a winding wire is adjusted, so that therotating speed of the motor is adjusted, the problem that the motor is easily damaged due to frequent adjustment of current in the prior art is solved, the service life of the motor is improved, andmeanwhile, through mutual cooperation of a limiting clamping ring and a limiting bearing, the miniature electric telescopic rods are limited, and the stability of the miniature electric telescopic rods driven by the magnet rotor to rotate is guaranteed.

The invention discloses a push type pencil sharpener. The push type pencil sharpener comprises a housing, a transmission mechanism, a driven mechanism, a cutting mechanism and a pencil inlet mechanism, wherein the housing comprises a first space and a second space which partly communicate with each other; an E-like second through hole is formed in the side surface of the housing, and the E-like second through hole comprises a vertical part and four horizontal parts which penetrate through the vertical part, so that four gear slots from top to bottom are formed; the transmission mechanism comprises a push rod, a first gear plate, a barrel sleeve and a compression spring; the driven mechanism comprises a rotary shaft, a second gear set and a fifth gear plate; the cutting mechanism comprises a fixed rod, a cutter holder and a milling cutter; the pencil inlet mechanism comprises a first part, a second part, an elastic element and a sixth gear plate. According to the push type pencil sharpener disclosed by the invention, energy can be stored through the compression spring, and the push rod drives the first gear plate to rotate by utilizing counter-acting force of the compression spring, so that the driven mechanism is further driven to rotate to drive the pencil inlet mechanism to rotate, and a pencil can be driven by the rotation of the pencil inlet mechanism to rotate relative to the cutting mechanism, so that the cutting work is completed, and therefore, the push type pencil sharpener has the advantages of being environmentally-friendly, energy-saving and quick.

The invention discloses a stack type ball dropping device and a ball serving mechanism capable of carrying multiple badmintons. The stack type ball dropping device comprises a top layer cover plate, a bottom layer fixing plate and a plurality of supporting rods, at least two ball supporting blocks are arranged on the supporting rods in the vertical direction in a layered mode, each ball supporting block is rotationally connected onto the corresponding supporting rod, and the inner side of one badminton and the ball support are supported by every two adjacent up ball supporting block and down ball supporting block respectively; the ball serving mechanism capable of carrying the multiple badmintons comprises a support, a cross arm is arranged on the support, a ball dropping device is arranged on the cross arm, the portion, below the cross arm, of the support is rotationally connected with a racket, and at least one adjusting component capable of adjusting the ball hitting inclined angle of the racket is arranged on the rack. According to the stack type ball dropping device, through the rotation of the ball supporting blocks, the badmintons can be placed in sequence, or the badmintons can be released in sequence, the structure is simple, and the clamping and the releasing are convenient; the ball serving mechanism can simulate the ball hitting motion that the human hand holds the racket, the adjustment on aspects of the angle, the speed and the strength of the badminton hitting is achieved, the operation is convenient, the adjustment is sensitive, and the precision is high.

The invention relates to a self-locking type shutter device with high impact resistance, which includes an image sensor support, separation blades, acting arms and driving motors, wherein a photosensitive window is arranged at the middle part of the image sensor support; the separation blades are provided with sliding grooves, and can be rotationally mounted on the image sensor support through separation blade shafts, and the separation blades can completely shield the photosensitive window when closed, and are within the range of the image sensor support when opened normally on two sides of the photosensitive window; the acting arms are rotationally mounted on the image sensor support through rotating shafts, and are provided with convex columns which are arranged at one end of each acting arm respectively, pass through the sliding grooves of the separation blades, and can slide along the sliding grooves; the connection lines between the centers of the rotating shafts of the acting arms and the axes of the convex columns are orthogonally intersected with the groove lines of the sliding grooves of the separation blades, or form included angles slight larger than 90 degrees; and the driving motors are mounted on the image sensor support, and are connected with the acting arms for driving the acting arms. The self-locking type shutter device with high impact resistance has the characteristics of self-locking, high impact resistance, high overload resistance and the like in the normally-open state, and capability of realizing non-uniformity correction or exposure control of an image sensor focal plane in the closed state, so that the opening and closing time can be regulated and controlled conveniently according to requirements, the volume is small and the structure is compact.

The invention discloses a 3D printing laser cutting device with a protective cover. Support legs are mounted on the lower surface of a machine body. The upper surfaces of the support legs are connected with the lower surface of the machine body. A workbench is mounted on the upper surface of the machine body. The lower surface of the workbench is connected with the upper surface of the machine body. A base is mounted on the upper surface of the workbench. According to the 3D printing laser cutting device with the protective cover, through the cooperation among a motor, a runner and a belt andthe cooperation between a duct and a fan, droplets generated during rotary cutting of a cutting head is sucked into a collection box by the fan, so that the defects that a connecting structure of a protective cover of a traditional laser cutting device with the protective cover and a cross bar is not stable, and the protective cover is easily detached in the working process; and a laser head is not provided with a limiting device, and consequently the laser head collides with the protective cover when moving left and right on the cross bar and damage to the laser head is caused are overcome; and the production time is saved, the machining efficiency is improved, and the 3D printing laser cutting device is suitable for being applied and popularized.

The invention discloses an oil-light electric hybrid power multi-body unmanned ship, belongs to the technical field of unmanned surface boats, and aims to solve the problems existing in the prior art.The unmanned ship comprises a main hull, an auxiliary hull detachably connected with the middle position of the main hull, a pair of cantilevers symmetrically arranged on the two sides of the auxiliary hull, water spraying propulsion and storage and drainage devices symmetrically arranged at the tail ends of the pair of stretchable cantilevers, a tail motor propeller arranged at the tail of the main hull, a main electric control unit arranged in the main hull in a sealed mode, an auxiliary electric control unit arranged in the auxiliary hull in a sealed mode, and an energy storage unit, wherein the main electric control unit carries out the integral control when the main hull and the auxiliary hull are not separated, the auxiliary electric control unit controls the auxiliary hull to movewhen the auxiliary hull is separated from the main hull, and the main electric control unit and the auxiliary electric control unit acquire electric energy through connection with an equipment bus; and the energy storage unit comprises an oil electric energy storage unit and a light energy storage unit, wherein the oil electric energy storage unit and the light energy storage unit are connected inparallel, and electric energy is generated to supply power to the whole ship via a power bus and the equipment bus.

The invention relates to a plane rotational flow generator which belongs to a generator, in particular to a plane rotational flow generator which has simpler structure and can form rotational flows parallel to the plane or an article surface. The plane rotational flow generator is provided with a base plate and an alternating current power supply, at least four upper surface and lower surface electrodes are respectively covered on the upper surface and the lower surface of the base plate, the four upper surface and lower surface electrodes are all arc-shaped electrodes which are bent along a same direction, and the four upper surface and lower surface electrodes are pairwise and equidistantly distributed in an interlaced radiation shape along a circumference. Furthermore, the upper surface electrodes are electrically connected with each other, the lower surface electrodes are electrically connected with each other, each upper surface electrode and each lower surface electrode are respectively and electrically connected with two output ends of the alternating current power supply, and the lower surface of the base plate and the lower surface electrodes are respectively provide with electrical medium material covering layers.