55results about How to "Reduce turning time" patented technology

An IGBT die structure includes an auxiliary P well region. A terminal, that is not connected to any other IGBT terminal, is coupled to the auxiliary P well region. To accelerate IGBT turn on, a current is injected into the terminal during the turn on time. The injected current causes charge carriers to be injected into the N drift layer of the IGBT, thereby reducing turn on time. To accelerate IGBT turn off, charge carriers are removed from the N drift layer by drawing current out of the terminal. To reduce V_CE(SAT), current can also be injected into the terminal during IGBT on time. An IGBT assembly involves the IGBT die structure and an associated current injection/extraction circuit. As appropriate, the circuit injects or extracts current from the terminal depending on whether the IGBT is in a turn on time or is in a turn off time.

An impact power tool includes a motor, a battery, a hammer mechanism and a control apparatus. The motor runs in the same speed no matter what torque level is selected. The motor runs for a total running time which is identical to an impacting time plus a compensative time. The impacting time is decided according to the selected torque level, and the compensative time is decided according to the power of the battery. An impacting time table and a compensative time table are pre-established to decide the impacting time value and the compensative time value. Therefore, the impact power tool always provides the theory torque output of the selected torque even if the battery is low.

The invention discloses a control method of an automatic guided vehicle. The method comprises the steps of acquiring the next location of the automatic guided vehicle; determining whether the next position is a turning point; if not, controlling the automatic guided vehicle to linearly across the next position; and if the next position if the turning point, controlling the automatic guided vehicleto turn at the next position. According to the method, a self-adaptive arc turning decision making logic is proposed; the way of running across the turning point can be dynamically selected based onthe real-time state; in addition, an arc turning waiting strategy is proposed, so that the probability of turning by an arc line at a jammed area is increased, and the overall running efficiency of asystem is improved.

The invention discloses a differential coordinated steering system of a hinged steering vehicle independently driven by a single axle. The differential coordinated steering system is matched with an original hydraulic steering system of the hinged steering vehicle to effectively improve steering flexibility of the hinged steering vehicle and lower steering energy consumption. The invention furtherdiscloses a control method of the differential coordinated steering system of the hinged steering vehicle independently driven by the single axle. A proportional controller is used for calculating proper differential torque according to the angular speed of a steering wheel, and the differential torque is applied to driving wheels on the left and right sides of a driving axle, so that the torqueof the driving wheel on one side is increased while the torque of the driving wheel on the other side is reduced, and a direct yawing moment is formed and coordinately acts with the hydraulic steeringsystem to achieve vehicle steering; and the purposes of shortening steering time and lowering energy consumption of the hydraulic steering system are achieved.

The invention discloses a novel motor-based electric car four-wheel independent steering system, and aims at improving maneuverability and handling stability of an electric car. The four-wheel independent steering system has the advantages that when an electric car turns at low speed, front and rear wheels perform antiphase steering, a turning radius of the car can be reduced, and the mobility of the electric car is improved; when the electric car turns at high speed, the front and rear wheels mainly perform in-phase steering, a side slip angle of the car can be reduced, the steady-state overshoot amount of a yaw rate of the car and the like are lowered, and vehicle handling stability is further improved. The steering system comprises novel motors, a connecting mechanism and a transmission mechanism, wherein each novel motor adopts a linear transmission motor; the connecting mechanism is used for connecting the linear transmission motors with the transmission mechanism, and comprises a cylindrical connecting sleeve; the transmission mechanism comprises a steering knuckle arm. Four wheels are all steering wheels and respectively correspond to one linear transmission motor; the four linear transmission motors are mutually independent and directly drive the steering of the respectively corresponding wheel.

The invention is applicable to the technical field of vehicle power transmission and provides a transmission speed difference steering device for a vehicle. The device comprises a control device, a steering device and a walking device, wherein the control device is connected with the walking device through the steering device, the steering device includes gear boxes, at least two pump bodies, at least two speed changing boxes and at least two motors, the gear boxes are connected with the pump bodies through connecting pieces, and the motors are opposite in rotating direction and connected withthe walking device through transmission shafts. Therefore, crawler belts on two sides can be controlled at the same time, the two crawler belts achieve reverse synchronous operation, and a tracked vehicle rotates in situ.

The invention discloses a shaft straightening device, and relates to the field of fitness equipment production and processing. The shaft straightening device comprises a bottom plate; a stand column is arranged on the bottom plate; a stamping unit is arranged above the stand column; a dial indicator is arranged on the bottom plate in front of the stand column; a T-shaped groove is formed between the dial indicator and the stand column; two cushion blocks which have the same shape are arranged in the T-shaped groove; a V-shaped groove is formed above each cushion block; the two cushion blocks are connected with the T-shaped groove in a sliding way. The stamping unit and the dial indicator are arranged in the shaft straightening device, so that a shaft with a bended diameter can be rapidly straightened, and the turning processing time of the shaft on a lathe can be effectively shortened.

A fixed glass mould forming device with simplified core-out operation is prepared by heating and pressurizing for glass nitre materials to form into a glass lens with a lower mould unit, limiting cylinder and a upper mould unit, which contain a lower mould and upper mould bases and mould cores set in lower and upper moulds, placing limiting cylinder on one side of the lower mould core. The glass nitre material is arranged in internal limiting cylinder to close upper and lower mould units. It saves core made time and shorten procedure.

The invention relates to a medical auxiliary device, in particular to a medical auxiliary turning-over device. Problem to the solved: to provide a medical auxiliary turning-over device capable of reducing labor intensity and turning-over time. The medical auxiliary turning-over device comprises a bed plate, a base, a pillow, a backrest, a first guard rail, a rubber block, a lifting rod, a first slide rail, a first slide block, a lifting plate, a support rod, a first bearing seat and the like; a left part and a right part of that front side and the back side of the bottom of the bed plate are connected with the base, the pillow is arranged on the rear side of the top of the bed plate, a backrest is connected on the top of the bed plate on the rear side of the pillow, and a first guard railis connected on the front side of the top of the bed plate. The lifting lever of the invention moves upward to drive the rubber block to move upward, so that the patient can be lifted, so that the patient and the bed board can be seamed, and then the patient is lifted and turned over manually, so that the labor intensity can be reduced, and the turning over time can be reduced, so that the turningover of the patient with different weights can be facilitated manually.

The invention relates to a front drive mechanism with a multi-speed steering function. A first transmission case is internally and rotatably provided with a small bevel pinion shaft, a power device isconnected to one end of the small bevel pinion shaft, and a rear drive axle is connected to the other end of the small bevel pinion shaft. The small bevel pinion shaft is further fixedly provided with a driving gear. The first transmission case further comprises an idler shaft, the idler shaft is fixedly provided with a high speed intermediate gear and a low speed intermediate gear which meshes with the driving gear. A second transmission case is internally and rotatably provided with a front drive output shaft, the front drive output shaft is fixedly provided with a low speed clutch connected with a low speed driven gear and a high speed clutch which connected with a high speed driven gear, the low speed driven gear meshes with the low speed intermediate gear, and the high speed driven gear meshes with the high speed intermediate gear. One end of the front drive output shaft is connected with a front axle. When a tractor works normally, the low speed clutch unifies to meet the requirements of the tractor on traction; and when the tractor turns, the low speed clutch disconnects, the high speed clutch unifies, the turning radius of the tractor is reduced, and the turning time is shortened.

The invention relates to an unmanned aerial vehicle cluster steering method based on differential acceleration, and belongs to the field of unmanned aerial vehicle cluster formation. The method comprises the following steps: S1, obtaining an initial unmanned aerial vehicle position, and establishing an unmanned aerial vehicle cluster kinetic equation; s2, updating and acquiring a position vector of each unmanned aerial vehicle, and determining all unmanned aerial vehicle neighbor sets in an unmanned aerial vehicle communication range; s3, calculating resultant force and differential acceleration of repulsive force and gravitational force according to a virtual force steering principle; s4, defining an acceleration adjustment coefficient, and dynamically adjusting the acceleration in real time according to the continuous change of the position in the steering process of the unmanned aerial vehicle cluster; and S5, continuously calculating the resultant force through the change of the acceleration so as to change the motion state of the unmanned aerial vehicle, and enabling the unmanned aerial vehicles at different positions to have proper acceleration. The motion process is similar to that of a rigid body when the unmanned aerial vehicle cluster steers, and the distance between two adjacent unmanned aerial vehicles is kept relatively stable; and S6, judging whether cluster steering is completed or not. If yes, turning is ended; and if not, returning to S2 to continue execution. In the cluster steering process, in order to avoid collision and separation of the unmanned aerial vehicle and control energy consumption, corresponding constraint conditions are established. When the unmanned aerial vehicle cluster steers, the acceleration can be dynamically adjusted according to the defined acceleration adjustment coefficient, rapid steering of the unmanned aerial vehicle cluster is achieved, the unmanned aerial vehicle cluster moves similar to a rigid body, and the cohesive force of the unmanned aerial vehicle cluster is increased.

The invention relates to a novel steering-mode gear transmission of a wheeled locomotive, and relates to steering gear transmission of wheeled locomotives. By the aid of the novel steering-mode gear transmission, wheels on two sides of the locomotive can reversely rotate, a locomotive body can be pivotally steered or turned around, the shortcoming that a wheeled locomotive in the prior steering art cannot be steered or turned around in narrow places or roads can be overcome, and the wheels on the two sides of the wheeled locomotive can mutually reversely rotate, and the locomotive body can be pivotally steered when places or roads are narrow. The novel steering-mode gear transmission comprises two novel steering gear transmission mechanisms which are connected with an existing transmission system. One end of a spline shaft (38) and one end of a spline shaft (39) of steering mechanisms are respectively connected with existing half-axle gears (5) and (6), and spline holes in one end of a bevel gear (25) and one end of a bevel gear (22) are respectively connected with spline heads of existing half axles (11) and (12). The novel steering-mode gear transmission has the advantages that the two steering mechanisms are respectively provided with steering gear control mechanisms with identical principles and structures, the locomotive can be turned, forwardly straightly move and backwardly straightly move under the control of the steering gear control mechanisms, and the wheels on the two sides of the locomotive can reversely rotate, so that the locomotive can be pivotally steered.

A stopper apparatus for robot rotary joint, for limiting the rotation angle of a turning shaft. The stopper apparatus includes: a rotary protrusion, fixed to the shaft and extended from an outer circumference surface of the shaft; a ring-like orbit, fixed to a mounting housing of the robot rotary joint, inserting the shaft therein; a first slider and a second slider, rotatably accommodated in the orbit and able to push each other to rotate; a stop protrusion, fixed to the housing of a robot rotary joint and extended in the direction of the center of the shaft; the rotary protrusion is able to directly push the second slider to rotate, while it is not able to directly push the first slider to rotate; the shaft, the rotary protrusion and the second slider cannot be obstructed by the stop protrusion when rotate, while the first slider is able to be obstructed by the stop protrusion when rotate, thereby the relative rotation between the shaft and the housing can be stopped. The present invention also provides a rotary joint and a robot. Compared with the existing prior arts, the proposed solution enables a rotation range larger than ±360 degrees.

The invention discloses a full-automatic building ground compaction robot. The full-automatic building ground compaction robot comprises a fourth shell, a storage battery, a first motor, a second motor and a third motor; a first fixing rod is welded at the bottom of the fourth shell, a first fixing plate is welded to one side of the first fixing rod, a first matching rod is welded to one side of the first fixing plate, one end of the first matching rod is provided with wheels, and the number of the wheels is 14; and a second matching rod is welded on one side of a middle wheel, a first gear isarranged at one end of the second matching rod, and a third matching rod is welded on one side of the inner wall of the fourth shell. In general, the working efficiency is improved, the labor cost ofa company is reduced, and the company benefits are increased; and the situation that compaction operation is successful once is guaranteed, manual repair is not needed, the working time is shortened,and the use is convenient and fast.

The present invention relates to a method characterized in that one or more passenger waves having a size corresponding to the number of passengers in the settling process, who may be standing at the same time in an aircraft aisle. The invention also relates to a system and equipment capable of performing a method according to the invention, in addition to corresponding computer programs.

The invention discloses a complete machine in-situ swivel device of a bridge girder erection machine, which comprises a first carrier loader, a second carrier loader, a first bridge girder erection machine carrying frame and a second bridge girder erection machine carrying frame, the first bridge girder erection machine carrying frame comprises a fixed part, a connecting part and a rotating part;the connecting part is arranged between the fixed part and the rotating part and used for supporting and rotationally connecting the rotating part to the upper portion of the fixed part, the upper endof the connecting part is fixedly connected with the rotating part, and the rotating part can rotate around the central axis of the connecting part relative to the fixed part. The second bridge girder erection machine carrying frame is mounted on the second carrying vehicle and used for carrying one end of the bridge girder erection machine, so that the bridge girder erection machine rotates around the central axis of the connecting part under the support of the first bridge girder erection machine carrying frame and the carrying of the second bridge girder erection machine carrying frame. During steering, the whole bridge girder erection machine rotates, disassembly and reassembly are not needed, the labor intensity of field staff is relieved, and the cost for renting hoisting equipmentis saved.

The invention discloses a wheel steering device of an aircraft tractor and relates to the technical field of wheel steering devices. The device includes wheels, wherein a connecting rod is fixedly connected to one side of the wheel, one end of the connecting rod is fixedly connected with the rotating block through a brace, one end of the rotating block is movably connected with a threaded rod through a pin shaft, the middle part of the threaded rod is movably connected with a moving block, the outer side of the moving block is provided with a rotating shaft, one end of the rotating shaft is fixedly connected with a first driven wheel, the other end of the rotating shaft is fixedly connected with a second driven wheel, one side of the second driven wheel is movably connected with a drivingwheel, the middle part of the driving wheel is fixedly connected with a main shaft, and one end of the main shaft is fixedly connected with a steering wheel. The threaded rod can fix the connection between the rotating shaft and the threaded rod, the first driven wheel moves the threaded rod through the driving of the steering wheel, so that the wheel can be steered, and a swing rod can drive therear wheels of the aircraft tractor to steer together, thereby reducing the steering time of the aircraft tractor.

The invention discloses a tire burst safety guaranteeing auxiliary device applicable to a four-driven unmanned mine truck, and aims to improve the safety of the unmanned mine truck after tire burst of a wheel and ensure the working efficiency of the mine truck. The auxiliary device consists of a driving mechanism, a transmission mechanism, a connecting structure and an auxiliary wheel, wherein the driving mechanism adopts an auxiliary motor as a power source of the safety guaranteeing auxiliary device; the transmission mechanism adopts a rod system, and comprises a plurality of transmission rods working together; the connecting structure adopts a hinged structure, and is used for fixing the safety guaranteeing auxiliary device and connecting the mechanisms; the auxiliary wheel is equipped with a wheel hub driving motor, is mounted on a fork-shaped mechanism, and provides a part of a braking force for the unmanned mine truck after the tire burst. The tire burst safety guaranteeing auxiliary device has the characteristics of convenience in mounting and dismounting, convenience in maintenance, suitability for working in a harsh working condition and the like; during working, the tire burst safety guaranteeing auxiliary device has a self-locking function so as to improve the working reliability thereof.

The invention relates to a rotary turnover device and method for a heavy product, belongs to the technical field of turnover of heavy products, and solves the problems of low turnover efficiency and poor safety of the heavy product in the prior art. The device comprises a round wheel assembly, a supporting frame and a plurality of carrier rollers, the carrier rollers are arranged on the supporting frame and rotationally connected with the supporting frame, the round wheel assembly is arranged in the supporting frame and located above the carrier rollers, the cylindrical surface of the round wheel assembly makes contact with the cylindrical surfaces of the carrier rollers, the round wheel assembly is provided with through holes, the heavy products are arranged in the through holes, and when the carrier rollers are rotated, the round wheel assembly drives the heavy products to turn over. The rotary turnover device is high in heavy product overturning efficiency and good in safety.

The invention provides an unmanned aerial vehicle waypoint jump planning method, system and device and a medium, and particularly relates to the technical field of unmanned aerial vehicle flight, the method comprises the following steps: obtaining an unmanned aerial vehicle waypoint jump instruction and a jump target waypoint, and determining a jump starting waypoint according to the current position of the unmanned aerial vehicle receiving the instruction; a jump route is planned according to a starting waypoint and a target waypoint of jump of the unmanned aerial vehicle and the type of the target waypoint, the jump route comprises an arc waypoint and a linear waypoint which are configured at the starting waypoint and the target waypoint and needed for jump, and the jump route is planned by configuring the arc waypoint and the linear waypoint at the starting waypoint and the target waypoint. Smooth turning is achieved through the jump route, the turning gradient is small, the turning track is not prone to overshoot, meanwhile, the maximum turning performance of the unmanned aerial vehicle is ensured, and the turning time is shortened; and the jump route is synchronized to the ground terminal in real time, so that a user can conveniently observe the expected waypoint jump track in advance, and the user experience is improved.