46results about How to "Achieve high torque output" patented technology

The invention relates to an electrically-driven nose wheel steering device for an unmanned aerial vehicle. The electrically-driven nose wheel steering device comprises a steering drive actuator, a steering torque arm, a link assembly and a drum assembly, wherein a motor in the steering drive actuator drives an output shaft to rotate through a transmission mechanism; the steering torque arm rotates along with the output shaft, the steering torque arm is connected to the link assembly through a knuckle bearing, and the link assembly drives the drum assembly to rotate; and the drum assembly is connected with an upper torque arm of an undercarriage torque arm, and drives nose wheels to steer through the undercarriage torque arm. The electrically-driven nose wheel steering device disclosed by the invention is driven by the motor, has the advantages of being light in weight, high in reliability and maintainability, and the like, as well as is more applicable to undercarriage systems of small and medium-sized unmanned aerial vehicles. The electrically-driven nose wheel steering device disclosed by the invention is obtained through an improvement on the basis of the existing undercarriage structure, and an undercarriage does not need to be re-designed, thus avoiding the high cost brought by the re-designing.

The invention relates to a cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problems that the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastic body to bond piezoelectric ceramic thinplates to excite, and the mechanical output capability and the controllability of an ultrasonic motor are lowered because a plurality of transducers are simultaneously driven. The cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator comprises a cylinder and a cantilever longitudinal-bending composite sandwich transducer which are connectedinto a whole by two cantilevers, a fastening screw is fixedly screwed with a rear end cover after passing through central through holes of a front end cover and the two cantilevers, four longitudinalvibration piezoelectric ceramic plates are arranged between the two cantilevers, two pairs of bending vibration piezoelectric ceramic plates are respectively arranged between the front end cover andthe first cantilever and between the rear end cover and the second cantilever, and the adjacent bending vibration piezoelectric ceramic plates and the adjacent longitudinal vibration piezoelectric ceramic plates have opposite polarization directions. The cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator is used for the field of manufacturing ultrasonic motors.

The invention provides a rotary motor using composite bending vibration biped linear ultrasonic oscillators, belonging to the technical field of piezoelectric ultrasonic motors. The invention solves the problems that the existing patch type rotary piezoelectric ultrasonic motor has low coupling efficiency, and the mechanical output capability is difficult to improve. The rotary motor provided by the invention comprises n oscillators, a rotor assembly, a base, n plate springs, n pre-pressing screws and 4n baffle plates, wherein n is a positive integer; the center of the base is provided with a central through hole and a bearing seat; the rotor assembly is arranged in the central through hole; n rectangular section slots are uniformly distributed on the base along the outer circumference direction of the bearing seat; one oscillator is arranged in each rectangular section slot; one plate spring is also arranged in each rectangular section slot; and the two ends of each plate spring are respectively connected fixedly with two installing seats of the oscillator positioned in the rectangular section slot. The rotary motor provided by the invention can realize large-torque output.

The invention relates to a power wrench. The power wrench comprises a housing, wherein the front end of the housing is equipped with a torque output structure used for torque output; and at least twopower sources which are in transmission connection with the torque output structure and are used for outputting torques of different sizes to the torque output structure separately are arranged on thehousing. According to the power wrench disclosed by the invention, more than one power source is arranged, and each power source outputs torques of different sizes to the torque output structure, sothat different power sources are only needed for outputting torques for different torque output environments. Compared with the prior art, the power wrench has the advantages that different torque output is realized by only one power source and a complex transmission mechanism, and the structure is simple.

The invention relates to a fixed-torque electric spanner. The fixed-torque electric spanner comprises a shell. A torque output structure with the rotating axis stretching in the front-and-back direction is arranged at the front end of the shell, a battery is mounted at the rear end of the shell, a counter-acting force measuring arm is fixedly arranged on the shell, a force detection structure forbeing in force transmission cooperation with a corresponding fixing part to detect acting force borne by the counter-reacting force measuring arm is arranged on the counter-acting force measuring arm,and the force detection structure comprises a force sensor. Torque is output to a bolt or a nut through the torque output structure, when tightened to a certain degree, the bolt or the nut cannot continue to be tightened, according to the acting force and the counter-acting force, the shell can bear counter-acting force at the moment, the force detection structure of the counter-acting force measuring arm is blocked on one fixing part, the counter-acting force borne by the shell at the moment is detected by the force sensor, and the output torque at the position of the torque output structurecan be precisely converted according to the counter-acting force.

The invention discloses a power-assisted electric loader driving system which comprises a main driving system, the two ends of the main driving system are connected with a front transmission shaft and a rear transmission shaft respectively, the front transmission shaft is connected with a front driving axle, and the rear transmission shaft is connected with a rear driving axle. The power-assisted type electric loader driving system further comprises a power-assisted type auxiliary power system connected with the front transmission shaft, the main driving system and the power-assisted type auxiliary power system are connected with a vehicle control unit, and the vehicle control unit calculates and obtains torque needed under various working conditions.

The invention relates to an orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problemsthat the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastomer to bond piezoelectric ceramic thin plates to excite, and the mechanical output capability and the controllability of an ultrasonic motor are reduced because a plurality of transducers are driven simultaneously. The orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator comprises a cylinder and an orthogonal transducer, wherein the orthogonal transducer is formed by orthogonally connecting amplitude rods of a first transducer and a secondtransducer into a whole, both sides of each transducer flange are respectively connected with screw posts which are respectively screwed with the amplitude rods and a rear end cover, the screw posts among the flange, the amplitude rods and the rear end cover are respectively sleeved with piezoelectric ceramic plates and electrode plates, insulating sleeves are arranged among the piezoelectric ceramic plates, the electrode plates and the screw posts, and a plurality of comb-shaped driving teeth are evenly distributed on the inner wall of the cylinder along a circumferential direction. The orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator is used for the field of manufacturing ultrasonic motors.

The invention relates to the field of reducers used for new energy automobiles such as pure electric automobiles and hybrid automobiles, in particular to a high-speed planetary reducer used for the new energy automobiles. The high-speed planetary reducer comprises a reducer box body, output gear rings, an output flange, a sun gear, a planet gear set and a planet carrier. The planet carrier is fixedly connected with the reducer box body through bolts. The output gear rings are fixedly connected with an output shaft. The output shaft is connected with the reducer box body through a first bearing in a rotating manner. The output flange is in key joint with the output shaft. The planet gear set comprises a planet gear, a second bearing and a shaft, wherein the shaft is connected with the planet carrier, and the planet gear is connected with the shaft through the second bearing in a rotating manner and is engaged with the output gear rings. The sun gear is engaged with the planet gear. One-stage planetary transmission is achieved, the speed ratio range is wide, the transmission efficiency is high, large-torque output can be achieved, and the structure is compact. A reducer shell comprises a water tank and a circulation water channel, circulating water cooling is adopted, and the transmission temperature rise of the reducer is low.

The invention relates to a control method and device of a frequency conversion air conditioner and the frequency conversion air conditioner. The control method of the frequency conversion air conditioner comprises the steps of determining a target frequency f of the air conditioner in operation according to outdoor environment temperature Tao; judging the relation between the target frequency f and a boundary point frequency f4 of a winding of a motor of an air conditioner compressor, and controlling the mode and operation frequency of the winding of the motor of the air conditioner compressoraccording to a comparison result of a frequency comparison module, and in the frequency adjusting process, if the frequency of the air conditioner is directly adjusted to the target frequency f without passing through the winding boundary point frequency f4, an oil return stop platform is inserted when the air conditioner frequency is adjusted to the target frequency f. According to the control method of the frequency conversion air conditioner, state conversion of the coil winding and the target frequency f of the air conditioner and control over air conditioner oil return can be combined, precise control over operation of the air conditioner is achieved, and the air conditioner operation energy efficiency can be improved.

The invention relates to a control method and a control device of a variable frequency air conditioner and the variable frequency air conditioner. The control method of the variable frequency air conditioner comprises the steps that the target frequency f of air conditioner operation is determined according to the outdoor environment temperature Tao; and a relation between the target frequency f and the winding demarcation point frequency f4 of a motor of an air conditioner compressor is judged, the motor winding mode and the oil return pause strategy of the air conditioner are determined according to the relation between the target frequency f and the winding demarcation point frequency f4, and oil return pause platforms are correspondingly inserted in the process of adjusting the air conditioner frequency to the winding demarcation point frequency f4 and adjusting the winding demarcation point frequency f4 to the target frequency f. According to the control method of the variable frequency air conditioner, the target frequency f of the air conditioner, state switching of the coil winding and air conditioner oil return control can be combined, fine control over operation of the air conditioner is achieved, and the operation energy efficiency of the air conditioner is improved.

The invention relates to a control method and control device of a variable frequency air conditioner as well as the variable frequency air conditioner. The control method of the variable frequency airconditioner comprises the steps that the target frequency f of air conditioner operation is determined according to the outdoor environment temperature T<ao>; and the relation between the target frequency f and the winding demarcation point frequency f4 of a motor of an air conditioner compressor is judged, and the winding mode of the motor of the air conditioner is determined according to the relation between the target frequency f and the winding demarcation point frequency f4. According to the control method of the variable frequency air conditioner, the target frequency f of the air conditioner and state switching of coil winding can be combined, so that fine control over operation of the air conditioner is achieved, and the operation energy efficiency of the air conditioner is improved.