35results about How to "Controllable speed" patented technology

The invention relates to the technical field of cranes and discloses a crane as well as a forward tipping preventing protection method and device thereof. The method comprises the following steps of: computing the maximum permissible running speed of the crane; computing the maximum permissible RPM (revolutions per minute) of an engine of the crane according to the maximum permissible running speed; and controlling the actual RPM of the engine to be not more than the maximum permissible RPM, wherein the RPM of the engine is easy to control, the running speed of the crane is controlled by controlling the RPM of the engine, and control is simple to operate. The crane, the method and the device have the following beneficial effects that the actual RPM of the engine is controlled to be not more than the maximum permissible RPM by computing the maximum permissible running speed of the crane and then computing the maximum permissible RPM of the engine of the crane according to the maximum permissible running speed; the control method is simple; and the problem in the prior art that the cranes are easy to roll over forward in the running process can be effectively solved.

The artificial leather base of the present invention includes an elastic polymer in the gap between the tangled non -woven fabric made of polyamine microfiber beam and a gap in a non -woven fabric.The single fiber fiber of the polyamide microfiber bundle is 0.2dtex or smaller.The polyamide micro fiber bundle has a 3.5cn / dtex or a larger average toughness and 60 % or smaller average elongation.Although its apparent proportion is as low as 0.30 or smaller, the base of the artificial revolution shows high mechanical properties, such as 50N / mm or larger tear intensity.As a result, the base of the artificial revolution has a good balance between mechanical performance, feeling, and especially in the application of sneakers, and its degree is not achieved by tradition.

Even when a nozzle with a small aperture is used in a localized jet solder tank, molten solder can be jetted locally and stably into a component mounted member, without lowering the rotational frequency of a pump in said localized jet solder tank which is difficult to set. As shown in figure 3, the localized jet automatic soldering device (100) is provided with a solder tank (4), which has a nozzle base (44) and contains molten solder (7); a pump (5), which brings the molten solder (7) in the solder tank (4) to a predetermined pressure, and supplies said solder (7) to the nozzle base (44); a plurality of nozzles (8a, etc.) with a predetermined solder ejection area connected to the nozzle base (44), and which eject the molten solder (7) supplied by the pump (5) at a predetermined pressure,such that said solder (7) builds up due to surface tension; and a dummy nozzle (32) connected to the nozzle base (44) with a solder ejection area larger than that of said nozzles (8a, etc.), and which ejects molten solder (7) supplied by the pump (5) at a predetermined pressure. The dummy nozzle (32) is disposed at a location closer to the pump (5) than the abovementioned nozzles (8a, etc.).

The invention provides a method for preparing bismuth oxychloride. The method comprises the following step: enabling a bismuth salt mixed solution to react under the condition of a constant pH value under the action of a nonionic surfactant to obtain bismuth oxychloride crystal, wherein the bismuth salt mixed solution comprises bismuth ions, chloridions, nitrate ions and water. By adopting the preparation method provided by the invention, the formation speed, shape, size and the like of the bismuth oxychloride are controllable by adjusting the constant pH value and selecting a proper nonionic surfactant, thereby preparing the micro-scale bismuth oxychloride crystal, which is controllable in size.

The invention discloses a method and a device for controlling idle speed of a petrol engine and rotational speed of a small accelerator. The device comprises an engine body, an electric control unit (ECU), a fuel injection device, an ignition device, a restrictor body and the like. The device is characterized in that: the restrictor body has nonadjustable and large enough idle speed air inlet quantity at an idle speed position; the electric control unit controls the ignition device; and the idle speed or a preset target rotational speed reached by the rotational speed of the small acceleratoris fed back and controlled through great adjustment of an ignition advance angle. The method comprises the following steps of: 1) judging a compressed expansion process or an intake / exhaust process at present; 2) giving an ignition signal in the compressed expansion process, and avoiding giving the ignition signal in the intake / exhaust process; and 3) determining the ignition advance angle according to a difference between the current measured rotational speed of the engine and the target rotational speed and a basic ignition angle.

The invention belongs to the technical field of machining and provides a workpiece feeding device. The workpiece feeding device comprises a clamping mechanism and a feeding mechanism, a cam of the feeding mechanism is provided with a cam groove, the lower end of a rocker is hinged to a rocker supporting seat, one end of a connecting rod is hinged to the upper end of the rocker, and the other end of the connecting rod is hinged to a slider. The slider is bilaterally slidably arranged on a guide rail, and a roller is rotatably arranged on the connecting rod and positioned in the cam groove. A left clamping jaw and a right clamping jaw of the clamping mechanism are symmetrically and rotatably arranged on a clamping support frame, and a left intermittent gear and a right intermittent gear are meshed with each other. One end of a left supporting rod is hinged to the clamping support frame, a left hinge pin is arranged on the left clamping jaw and positioned in a left U-shaped groove, one end of a right supporting rod is hinged to the clamping support frame, and a right hinge pin is arranged on the right clamping jaw and positioned in a right U-shaped groove. The workpiece feeding device has the advantages of quickness and accuracy in feeding of workpieces 25, reasonable structure and high reliability.

The invention provides an automatic continuous drilling device, which belongs to the technical field of mechanical processing. It includes a feeding seat and a three-way valve. The push plate can be slid left and right and set in the feeding trough. The drill support can be slid up and down and set on the drill support. The drill support can be rotated and set at the lower end of the drill support. The drill is installed on the drill support. The lower side of the drilling machine pillar is provided with a rack, and the gear and the rack are meshed with each other. The positioning pressing plate can slide up and down and is set on the guiding seat of the positioning plate. The ejector rod of the three-way valve passes through the upper isolation ring and the lower isolation ring. It can be slid up and down in the valve body, the horizontal exhaust hole is connected to the vertical exhaust hole, the air pump is connected to the upper valve port, the lower valve port is connected to the air valve of the cylinder block, and the valve opening limit screw of the valve opening assembly is threaded on the On the inverted L-shaped limit bracket, a drilling guide sleeve is arranged on the drilling access plate. The invention realizes automatic loading and clamping of workpieces, rapidly realizes continuous drilling of workpieces, and has a high degree of automation.

The invention discloses a frictional force demonstrator which comprises the components of a horizontal table, a sliding device, a displacement sensor, a motor pulling device, a friction block, a forcemeasuring device, a pointer, a first display device, a switch panel, a second display device, a chute, an amplifying device, an image acquisition device, a computer, a projector, a printer, a blackboard writing device, a projection device and a horizontal measuring device. According to the frictional force demonstrator, according to the indicating condition of the pointer on a scale plate, and amplifying a relation between a slide block pulling time by the motor pulling device and a movement distance of the slide block on the first display device, a relative motion trend direction and a relative motion direction are determined through observing a burr direction on a burr flexible plate by a magnifier, and furthermore the burr direction on the burr flexible plate in a continuous time period in the relative motion trend and the relative movement is acquired through the image acquisition device, and furthermore a burr direction image is amplified and displayed on a projection cloth curtain, thereby quickly, visually and accurately demonstrating the frictional force direction and the relative movement trend direction.

The invention discloses an electromagnetically-inductive self-overturning heating frying pot, comprising a supporting frame, a control cabinet and a motor, wherein an overturning mechanism is arranged in the control cabinet; the overturning mechanism is provided with a frying pot body; the edge of the frying pot body is fixed through a frying pot body fixing component; the supporting frame is fixedly arranged on the upper end of the control cabinet; the top part of the supporting frame is provided with a motor shield; the motor is arranged in the motor shield; a driving rolling wheel is arranged on one end of the motor. The electromagnetically-inductive self-overturning heating frying pot has the advantages that a junction between the motor shield and a driving shaft is sealed by a sealing ring, so that the oil leakage phenomenon of the motor is prevented; the inner surface of the frying pot is provided with a layer of polytetrafluoroethylene material; food cannot be stuck on the inner surface of the frying pot in the process of frying the food, so that the frying pot is conveniently cleaned; stirring blades are made of stainless steel; the stirring blades are in close contact with the bottom of the frying pot during the working process; the stirring blades scrape the bottom of the pot once for every rotation of the driving shaft, so that the food can be effectively prevented from being stuck on the pot.

The invention belongs to the technical field of tunnel detection, and relates to a tunnel detection telescopic manipulator, comprising a base, a yaw base is mounted on the surface of the base, a transmission box is connected to the yaw base through a rotating shaft, and an installation frame is fixedly connected to the transmission box, and the installation frame A multi-section cylinder is installed in the middle, the lower end of the multi-section cylinder is fixedly connected with the transmission box, and a gearbox is installed on the side of the transmission box. The reel on the output shaft of the box is fixedly connected to one end of the transmission belt, and the other end of the transmission belt is fixedly connected to the top of the multi-section cylinder. The device is small in size, fast in lifting and lowering, adjustable in angle, and precise in motion.

The invention provides a swinging arm type advertisement paper cutting device, and belongs to the technical field of cutting equipment. The swinging arm type advertisement paper cutting device comprises a cutting mechanism and a conveying mechanism, wherein an unrolling roller of the conveying mechanism is rotatablely arranged on an unrolling support frame; a coiling roller is rotatablely arranged on a coiling support frame; a swinging arm of the cutting mechanism is hinged onto the machine frame through a swinging arm pin shaft; the two ends of a cutting pulling wire are respectively arranged on a first wire pulling support seat and a second wire pulling support seat; a slide rod is arranged on a slide rod guide seat in a way capable of leftwards and rightwards sliding; a pressing jacking rod of the pressing assembly is always attached to a pressing platform arranged at the lower end of the swinging arm under the effect of a jacking rod press spring; a support rolling wheel arranged on the swinging arm is always attached to a wedge groove of the slide rod under the effect of the pressing jacking rod; the driving cam is rotatablely arranged on a cam support seat in an eccentric way through a cam shaft; the slide rod is always attached to a driving cam under the effect of a slide rod press spring. The swinging arm type advertisement paper cutting device has the advantages that the fast cutting on advertisement paper is realized; a cut edge is regular; the automation degree is high; the cutting efficiency is high; the reliability is high.

The invention discloses a chassis dynamometer rotating hub tension-compression sensor mounting structure and a mounting method thereof. The chassis dynamometer rotating hub tension-compression sensor mounting structure comprises a support frame, a transmission shaft and a rotating hub, wherein the transmission shaft is sleeved with a driving assembly, a machine shell of the driving assembly is connected with the transmission shaft through a first transmission bearing, and a bearing assembly is connected between the machine shell and the supporting frame; a plurality of mounting plates are axially arranged on the outer circumference of the machine shell, and a pull seat is mounted on at least one mounting plate; the pulling seat is movably connected with a pulling rod assembly, the other end of the pulling rod assembly is connected with a pulling and pressing sensor, the pulling and pressing sensor is arranged on a mounting frame, and the mounting frame is fixedly arranged on the supporting frame; the central axis of the tension and compression sensor is perpendicular to the central axis of the transmission shaft. The mounting structure is simple and compact, is easy to manufacture and mount, and can effectively obtain the stress condition of the transmission shaft.

The invention discloses a water system resistance measuring device for an automobile cooling system, comprising a matrix and the components arranged on the matrix, namely, an engine, an expansion water bottle, a vehicle-mounted water pump, a thermostat valve, a water tank and a heater core body; the engine, the expansion water bottle, the vehicle-mounted water pump, the thermostat valve, the water tank and the heater core body are connected through a pipeline according to the connecting mode of the automobile cooling system; the pipeline is also provided with a flow sensor and a plurality of pressure sensors arranged near the vehicle-mounted water pump, the engine, the water tank and the heater core body; a motor and a water storage tank which can be heated are arranged on the matrix; themotor is drivenly connected with the vehicle-mounted water pump; and the water storage tank which can be heated is connected with the pipeline through a stop valve. As all the components in the device are connected based on the connecting mode of the automobile cooling system, the measured flow and pressure values can be much closer to the true value and can better reflect the real situation of the cooling system, so the measurement results are more reliable.

The invention discloses a jaw crusher. The jaw crusher comprises a connecting rod, an electric control box, an electric motor, a belt, a pulling rod spring, a back toggle plate, a center shaft, a belt wheel, a suspension shaft, a movable crushing plate, a fixed crushing plate, a sensor, a rack, a front toggle plate, rollers and a base. The back toggle plate and the front toggle plate are movably connected through the connecting rod. The rack is mounted on the base with the rollers. The electric control box is arranged on the base. The electric motor is fixedly mounted on the base. The electric motor and the belt wheel are movably connected through the belt. According to the jaw crusher, the used electric motor is an alternating current servo motor, so that the rotating speed of the electric motor is easy to control, the position precision is quite accurate, and a voltage signal can be converted into torque and the rotating speed to drive a controlled object. Poly-rowed teeth are arranged on the right side face of the movable crushing plate and the left side face of the fixed crushing plate, and therefore, the crushing rate is greatly increased.

The invention provides a steel wire rope speed-measuring device. The rotating speed of a rope supporting wheel is easy to control and accurate to measure. According to the steel wire rope speed-measuring device, a bracket is connected with a speed-measuring wheel and the rope supporting wheel; the speed-measuring wheel is provided with a tachometer and a crank inserting hole; a sliding groove is formed in the rope supporting wheel; and a screw rod is arranged in the sliding groove. A handle is rotated manually, so the rotating speed is easy to control, people are difficult to hurt, and the speed is measured accurately.

The invention discloses vibratory conveying equipment of a pulverizing machine of powder coatings. The vibratory conveying equipment comprises a machine frame and a vibratory conveying device. The vibratory conveying device comprises a vibratory conveying fixed support, an elastic device, a vibratory conveying mechanism and a vibrating device, wherein the vibratory conveying fixed support is installed on the machine frame, the elastic device is installed on the vibratory conveying fixed support, the vibratory conveying mechanism is installed on the elastic device, and the vibrating device is installed between the vibratory conveying fixed support and the vibratory conveying mechanism. According to the vibratory conveying equipment, the machine frame facilitates the layout of other components, the strength of the vibratory conveying fixed support can be improved, the structural stability of the vibratory conveying fixed support can be improved, and the amount of elastic deformation of the vibratory conveying fixed support can be increased; the vibratory conveying device vibrates drastically and promotes continuous conveying of materials, and the rotation speed of a vibrating motor can be easily controlled according to the conveying requirement of the materials.

The invention relates to the technical field of medical instruments, and particularly discloses a stent film covering device and a stent film covering method.The stent film covering device comprises an extrusion module used for controlling release of a film covering solution, a displacement module used for controlling the extrusion module to move back and forth in the fixed direction and a rotating module used for fixing a bare stent and enabling the bare stent to rotate according to the set rotating speed; the extrusion module is arranged on the displacement module, the displacement module and the rotating module are arranged on a fixing plate, and a solution outlet of the extrusion module faces the direction of the bare stent fixed to the rotating module. The rotating module is used for driving the extruding module to rotate, so that the film coating solution released by the extruding module is uniformly arranged on the surface of the bare stent driven by the rotating module to rotate. The invention further discloses a stent film coating method. The technical problems that a self-made film is large in operation difficulty and long in manufacturing time, and the size of the self-made film is not accurate are solved.

The invention provides a rivet press-fitting device, and belongs to the technical field of riveting. The rivet press-fitting device comprises a feeding mechanism and a press-fitting mechanism. A feeding curtain of the feeding mechanism surrounds a front feeding roller and a rear feeding roller. U-shaped bearing bases are arranged on the feeding curtain at equal intervals. The middle end of a leftclamping claw of the press-fitting mechanism is hinged to the left end of a clamping claw support through a left clamping claw pin shaft, and a left pressing plate is arranged at the lower end of theleft clamping claw. A centering pressing column is arranged on the right side of the left pressing plate. The upper end of a right clamping claw is hinged to the right end of the clamping claw supportthrough a right clamping claw pin shaft. A right pressing plate is arranged at the lower end of the right clamping claw. A left finger is located on the upper side of a right finger, and the left finger and the right finger are in lap joint. The left end and the right end of a tension spring are connected with a left tension spring support and a right tension spring support correspondingly. A torsion spring and a lever pin shaft are coaxially arranged. An eccentric wheel is eccentrically arranged on an eccentric wheel support shaft, and a wheel is attached to the eccentric wheel under the action of the torsion spring. The rivet press-fitting device can continuously achieve rivet press-fitting, the press-fitting force is stable, reliability is good, and the automation degree is high.

The invention discloses a preparation method of 3,5-dibromo-2-aminobenzoic acid. The preparation method comprises the following steps: (I) performing in-situ oxidation on bromide with an oxidant underan acidic condition, and carrying out a bromination reaction on phthalimide to obtain N-bromophthalimide; (II) performing Hoffmann degradation on the N-bromophthalimide under the action of alkali toobtain 2-aminobenzoic acid and bromoanion; (III) further adding an appropriate amount of bromide and oxidant, and carrying out a bromination reaction on the 2-aminobenzoic acid to obtain the product,namely, 3,5-dibromo-2-aminobenzoic acid. The preparation method has the advantages of environment-friendly reaction system, simple, convenient and safe reaction operation, low cost, high reaction selectivity and high product yield and the like.

The invention discloses a method and a device for controlling idle speed of a petrol engine and rotational speed of a small accelerator. The device comprises an engine body, an electric control unit (ECU), a fuel injection device, an ignition device, a restrictor body and the like. The device is characterized in that: the restrictor body has nonadjustable and large enough idle speed air inlet quantity at an idle speed position; the electric control unit controls the ignition device; and the idle speed or a preset target rotational speed reached by the rotational speed of the small acceleratoris fed back and controlled through great adjustment of an ignition advance angle. The method comprises the following steps of: 1) judging a compressed expansion process or an intake / exhaust process at present; 2) giving an ignition signal in the compressed expansion process, and avoiding giving the ignition signal in the intake / exhaust process; and 3) determining the ignition advance angle according to a difference between the current measured rotational speed of the engine and the target rotational speed and a basic ignition angle.

The invention belongs to the technical field of equipment for treating outer surfaces of parts and particularly relates to a casting cleaning device comprising a protective shell, a rack, a plurality of clamp holders for clamping castings, steel shots and a roller, wherein the plurality of clamp holders are rotatably arranged on the rack and are distributed around the roller; the roller is rotatably arranged on the rack; shot discharging holes are formed in part of the wall of the roller; the steel shots are contained in the roller; and the protective cover is arranged on the roller and the clamp holders. Compared with the traditional manual cleaning way, the casting cleaning device adopts a mechanized cleaning way in the scheme, so that the cleaning efficiency is greatly increased. In addition, artificial loafing conditions can be avoided by using a machine, and the cleaning quality can be guaranteed.

The invention discloses a VR scene action display method and system based on a servo electric cylinder technology. Control data are sent to an action display device through a control end of VR head-mounted display equipment; the action display device displays a corresponding three-dimensional virtual reality scene in the VR head-mounted display equipment according to the control data sent by the VR head-mounted display equipment, and transmits action display data to the server for processing; the server controls the parameters of the electric cylinder according to the action display data transmitted by the action display device, and controls the action of the electric cylinder according to the set motion trail in combination with the three-dimensional virtual reality scene displayed by theaction display device. According to the invention, through the immersive roaming scene of the VR head-mounted display device and in combination with the action of the electric cylinder, an experiencer can immerse the roaming scene in the virtual world as much as possible, and the effect is more realistic; the action display system can achieve the actions of inclination, ascending, descending, rotation, vibration and the like, and the operation speed of the electric cylinder is controllable.

The invention belongs to the technical field of unmanned aerial vehicle holder control, and particularly relates to an aircraft following holder control method and system. The method comprises the following steps: the aircraft obtains a course rocker control signal sent by a remote controller, and forwards the course rocker control signal to holder equipment; the holder equipment executes holder azimuth motion adjustment operation according to a course rocker control signal sent by the remote controller; an azimuth included angle between a fuselage of the aircraft and a yaw axis of the adjusted holder equipment is detected, and a rotating speed required by the current aircraft to move along with the holder equipment is calculated according to the azimuth included angle; and the aircraft adjusts the course of the aircraft according to the obtained rotating speed, eliminates the azimuth included angle between the aircraft and the holder equipment, and keeps consistent with the direction of the holder equipment. According to the invention, the linkage of the holder orientation and the aircraft course is realized, the problem that a camera image is blurred due to high-speed rotation of the image in the traditional control process is solved, and the image experience is improved.

The invention provides a multi-effect screening device. The multi-effect screening device comprises a real-time controllable self-cleaning roller screening machine; the real-time controllable self-cleaning roller screening machine comprises a plurality of screening rollers, a screening roller motor, a motor frequency converter and a programmable logic controller control program; the programmable logic controller control program controls the screening roller motor with the following specific steps: (1) starting from the screening roller at one end, changing the rotating frequency of each screening roller from the original ordinary low frequency to high frequency in sequence, and then changing the rotating frequency of the screening roller at the other end to high frequency; (2) starting from the screening roller at the other end, changing the rotating frequency of each screening roller from high frequency to ordinary low frequency in sequence, and then changing the frequency of the screening roller at the original end to ordinary low frequency. The multi-effect screening device utilizes the rotative speed difference of the two screening rollers to clear up the impurities between thescreening rollers, achieving the circulation of cleaning the impurities between the screening rollers, timely adjusting the circulation period of cleaning according to the amount of materials and impurities, ensuring no impurities between the screening roller gaps are accumulated for long term, and extending the service life of the screening roller.

The invention discloses a vibration conveyor of a powder coating crusher. The vibration conveyor comprises a vibration conveying fixing frame, an elastic device, a vibration conveying mechanism and a vibration device. The elastic device comprises left elastic assemblies and right elastic assemblies. Each left elastic assembly comprises a left spring. Each right elastic assembly comprises two right springs which are arranged transversely. The vibration conveying mechanism comprises a vibration conveying frame, a vibration conveying bottom plate, a vibration conveying top plate, reinforced beams and a screening device. The vibration device comprises a vibration motor, a driving belt pulley, a driven belt pulley, a belt, a vibration bearing plate, a vibration shaft and an eccentric block. By adopting the vibration conveyor, materials can be conveyed continuously and reliably, the produced vibration is large, and continuous conveying of the materials is further facilitated; the vibration frequency of the vibration conveying mechanism and the frequency of the vibration device can be made consistent, and the rotational speed of the vibration motor can be controlled more easily according to the requirements for material conveying.

The invention relates to the technical field of cranes, and discloses a crane and its anti-overturn protection method and device, wherein the crane and its anti-overturn protection method include: calculating the maximum allowable travel speed of the crane; The traveling speed calculates the maximum allowable rotational speed of the engine of the crane, the rotational speed of the engine is easy to control, and the operation is simple to control the traveling speed of the crane by controlling the rotational speed of the engine; the actual rotational speed of the control engine is not greater than the maximum permitted rotational speed. By calculating the maximum allowable speed of the crane, and then calculating the maximum allowable speed of the crane engine through the maximum allowable speed, and then controlling the actual speed of the engine not to exceed the maximum allowable speed, the control method is simple and can effectively solve the problem of the crane in the prior art. The problem of easy forward tipping in the middle.

The invention discloses vibratory conveying equipment of a pulverizing machine of powder coatings. The vibratory conveying equipment comprises a machine frame and a vibratory conveying device. The vibratory conveying device comprises a vibratory conveying fixed support, an elastic device, a vibratory conveying mechanism and a vibrating device, wherein the vibratory conveying fixed support is installed on the machine frame, the elastic device is installed on the vibratory conveying fixed support, the vibratory conveying mechanism is installed on the elastic device, and the vibrating device is installed between the vibratory conveying fixed support and the vibratory conveying mechanism. According to the vibratory conveying equipment, the machine frame facilitates the layout of other components, the strength of the vibratory conveying fixed support can be improved, the structural stability of the vibratory conveying fixed support can be improved, and the amount of elastic deformation of the vibratory conveying fixed support can be increased; the vibratory conveying device vibrates drastically and promotes continuous conveying of materials, and the rotation speed of a vibrating motor can be easily controlled according to the conveying requirement of the materials.

The invention relates to a motor, a household appliance, a gardening tool and a vehicle. The motor comprises a rotor core, the rotor core comprises a rotor yoke part and a plurality of rotor tooth parts, the plurality of rotor tooth parts are uniformly connected to the outer side of the rotor yoke part along the circumferential direction, the end surface, far away from the rotor yoke part, of each rotor tooth part is a first cambered surface, the center of the first cambered surface is a first center of circle, and the center of the first cambered surface is a second center of circle; the tracks of the first circle centers of the plurality of rotor tooth parts form a circle with the center of the rotor core as the circle center; the stator iron core is arranged outside the rotor iron core in a sleeving mode, the stator iron core comprises stator teeth, pole shoe parts are formed at the ends, close to the rotor iron core, of the stator teeth, and the end faces, close to the rotor iron core, of the pole shoe parts are second cambered surfaces protruding towards the rotor iron core. The household appliance, the gardening tool or the vehicle comprises the motor. The vibration noise of the motor can be reduced.

The invention discloses an electric toothbrush.A battery is installed in a battery groove.A speed regulating switch is switched on, a motor rotates to drive a straight shaft to rotate, and thus a crankshaft is driven to rotate.A concave-convex path part carries out circular motion with the straight shaft as a circle center point and carries out vertical movement in a crankshaft sliding groove of driving sliding blocks, and the driving sliding blocks carry out horizontal reciprocating motion on the concave-convex path part.The adjacent driving sliding blocks carry out relative horizontal motion to keep the relative balance of a brush head.Through simple circular motion, brush bristles move in the direction of gaps between teeth, a scientific tooth brushing method is achieved, the cleaning effect is better, teeth and gingiva are not likely to be hurt, and meanwhile the amplitude of reciprocating motion can be regulated; in addition, the speed can be regulated, tooth brushing is more comfortable, and efficiency is higher.

The invention relates to a continuous annular automatic high-temperature fusion welding device for copper bar rotors of large and medium-sized motors. The device comprises a main underframe with a middle hole, a large rotary flat plate capable of intermittently rotating is mounted on the main underframe through a rotary support, and a round hole corresponding to the middle hole of the main underframe and a shaft head for positioning a workpiece are arranged in the middle of the large rotary flat plate. A plurality of height adjusting assemblies are arranged on the upper surface of the large rotary flat plate in the circumferential direction and used for abutting against an end ring of a workpiece to keep the end ring horizontal. The main underframe is further provided with a welding assembly with the radial position adjustable, the red copper bars to be welded in the end rings are sequentially in butt joint with the lower portion of the welding assembly along with rotation of the large rotation flat plate, and welding is completed through rotation intermittence. A rotary mechanical device drives the workpiece to rotate and cooperates with the welding assembly to complete welding, and the reliability is high. In the whole high-temperature fusion welding process, the speed is controllable, positioning is reliable, the process quality is improved, and meanwhile the operation labor intensity is greatly relieved.