114results about How to "Turn simple" patented technology

The invention discloses a new-concept intelligent multifunctional spaying machine chassis. The new-concept intelligent multifunctional spaying machine chassis comprises a chassis rack, a pesticide tank fixing support, a spray lance lifting support, a spray lance conversion mechanism, a spray head and wheels, wherein the pesticide tank fixing support is arranged at the rear end of the chassis rack, the spray lance lifting support is arranged at the front end of the chassis rack in a rotatable mode, the spray lance conversion mechanism and the spray lance lifting support constitute a vertical moving pair, the spray head is arranged on the spray lance conversion mechanism, and the wheels are installed at the bottom of the chassis rack through a longitudinal adjusting device and a transverse adjusting device. The new-concept intelligent multifunctional spaying machine chassis has the advantages of applying full-hydraulic power, and being stable in driving, large in drive torque, flexible in steering, simple in transmission, concise in overall structure, reasonable in configuration, and stable in center of gravity. In addition, the new-concept intelligent multifunctional spaying machine chassis has the advantages that due to the facts that stepless adjustment of the wheel torque, the ground clearance height and the like can be achieved and the spray lance conversion mechanism can descend, ascend and rotate, the spray lance conversion mechanism can achieve line-shaped conversion, U-shaped conversion and reverse-U-shaped conversion, the effect of omni-directional spraying is achieved, the requirement for all-terrain omni-directional spraying of different plants and different growth cultivation periods of one plant can be overall achieved through the new-concept intelligent multifunctional spaying machine chassis.

The invention relates to a symmetric bionic hexapoda walking device and belongs to a robot. The symmetric bionic hexapoda walking device comprises an upper layer mechanism and a lower layer mechanism, wherein the upper layer mechanism and the lower layer mechanism are same in structure and centrosymmetric; the upper layer mechanism is connected to the lower layer mechanism through a central steering unit; the central steering unit comprises a bevel gear I, a steering shaft, a bevel gear II and a motor; and the motor is connected to the steering shaft through a bevel gear pair composed of the bevel gear I and the bevel gear II. A novel bionic hexapoda walking mechanism is designed on the basis of bionics. A gait motion mode of a hexapoda insect is taken as a template of the bionic hexapodawalking mechanism, wherein a propodium and a metapodium on one side and a mesopodium on the other side are taken as one set and a triangular support mechanism is formed when the bionic hexapoda walking mechanism walks for one step. Such a walking mode is characterized by low center of gravity and fast response, so that the novel bionic hexapoda walking mechanism has ultrahigh structural stability. Meanwhile, a rotating shaft is designed in the central position of a robot mechanism, so that the robot mechanism provided by the invention has a double-layered flexible structure and can be more conveniently steered.

The invention relates to a security robot, and belongs to the technical field of security robots. The security robot comprises a shell, a base plate, wheels, a front-wheel damping wrist set structure,a key grouping and locking structure, a multi-degree-of-freedom telescopic structure, a heat-dissipation system and a controller. According to the security robot, automatic monitoring can be achieved, and monitoring information can be transmitted in real time; all switches of a key box are effectively grouped, so that management is facilitated, and disorder of keys is effectively avoided; by adoption of the structural design of the front dual-damping wrist set structure, effective damping can be achieved, and steering is easy; through a multi-degree-of-freedom lifting adjustment structure, multi-degree-of-freedom adjustment of a camera of the security robot can be achieved, different work requirements are met, and patrolling information is effectively synchronized; and through the structural design of the circulating heat-dissipation system, the stability of the temperature and humidity of the internal environment of the security robot can be ensured, and the heat-dissipation efficiency is improved.

The invention discloses an articulated tractor-trailer tank car with scalable outrigger which can be used in steel mill. Its back outrigger is adjustable on level, hydraulic system has high safety and it has flexible turning. It contains tractor, semi-trailer, saddle and tank structure. The semi-trailer links the back of the tractor by the saddle. The tank structure locates on the semi-trailer. The semi-trailer has front and back outriggers on both sides of its front and levelly scalable back ends separately. The back outrigger contains edge beam, box beam, level cylinder and outrigger. The edge beam fixes on both sides of the back of the semi-trailer. One end of the box beam covers in the edge beam and its other end links the outrigger. Two ends of cylinder link box beam and edge beam separately.

A branched flow channel type self-adaptation inflow control device comprises a base tube, an upper portion outer sleeve, a sand control screen tube, a lower portion outer sleeve and an inflow control box in a mutual connection mode. The type of fluid can be automatically identified, the level of flowing resistance can be automatically adjusted according to the characteristics of the fluid itself, before water breakthrough, certain resistance is exerted on the fluid, influences of a heeling effect and a reservoir stratum anisotropism can be offset, and therefore inflow sections along a horizontal shaft are even; once water breakthrough happens, flowing resistance will be increased obviously, so that flowing on a water layer section is restrained, and the long-period stable yield of an oil-gas well is guaranteed.

The invention mainly belongs to the technical field of rotary guide systems, and particularly relates to a full-rotation hydraulic inward-pushing-type high-build-up-rate rotation guide tool. The full-rotation hydraulic inward-pushing-type high-build-up-rate rotation guide tool adopts a hydraulic system driven by a turbine and a generator set to convert the energy of the pressure mud into the hydraulic energy. By adopting the hydraulic system driven by the turbine and the generator set, the power is provided for a piston through the hydraulic mode, so that the lateral force obtained by a drillbit is larger. Meanwhile, the hinged mode is adopted, so that the optimal steering capability is achieved. As a result, the high build-up rate is easier to achieve. The hydraulic piston pushes againstthe inner wall of a lower rotating sleeve instead of the wall of a well, so that the abrasion can be reduced. At the same time, only one set of pushing piston assemblies is pushed out at the same moment, so that the unnecessary work is reduced. The service life of the piston is prolonged.

A guidewire for medical use such as in vascular and nonvascular systems. The guidewire made from a titanium molybdenum alloy wire with a composition of approximately 78% titanium 11.5% molybdenum 6% zirconium and 4.5% tin by weight such that it is softer than stainless steel guidewires and stiffer than NiTi alloy guidewires. The distal end of the guidewire is of a smaller diameter and softer than the proximal end and fitted with a coil for springiness such that the distal end will bend when encountering curves in the body passageways. The distal tip may be heat treated for a gradient of softness with the distal tip being the softest. The distal end may also be tapered to provide an additional gradient of softness. A distal tip on the distal end of the guidewire protects the wall of the passageway from being punctured as the guidewire travels through the passageway. The resulting guidewire has properties between those of stainless steel guidewires and NiTi alloy guidewires for better torsion and stiffness characteristics.

The invention discloses a dust cup of a dust collector, and the dust cup is provided with an air inlet, a primary dust collection chamber, a secondary dust collection chamber, a primary cyclone separator, a secondary cyclone separator and an air outlet, wherein the secondary dust collection chamber surrounds the primary dust collection chamber; the primary cyclone separator is provided with a primary cyclone channel; the primary cyclone channel comprises a surrounding wall and a baffle; the baffle is spirally extended to the bottom, used for receiving crush as, of the primary dust collection chamber from the bottom of the cyclone chamber so as to form the spirally-extending primary cyclone channel together with the surrounding wall; one end, serving as a crude ash inlet, of the primary cyclone channel is communicated with the primary cyclone chamber; the other end, serving as a primary ash outlet, of the primary cyclone channel is communicated with the primary dust collection chamber;the secondary cyclone separator comprises a cyclone in which a secondary cyclone channel is arranged; the inlet of the secondary cyclone channel is communicated with the primary cyclone chamber, is positioned above the crude ash inlet and is opposite to the crude ash inlet; and the outlet of the secondary cyclone channel is communicated with the air outlet and the secondary dust collection chamber. According to the invention, the crude ash in dust can be prevented from rising, and dust and ash can be excellently separated with high efficiency.

The invention belongs to the field of agricultural machinery, and particularly relates to a differential mechanism type track combine-harvester gearbox. The differential mechanism type track combine-harvester gearbox comprises a box body, wherein a power input shaft, a three-gear speed changing device gear shifting shaft, a differential mechanism shaft, a steering control shaft, a differential mechanism control shaft, a power output shaft, two power output half shafts, a gear drive mechanism and a hydraulic control system are sequentially arranged in the box body, the two power output half shafts are located on the lower portion of the power output shaft and connected with the two ends of the power output shaft through gears respectively, and the gear drive mechanism and the hydraulic control system are arranged on all the shafts and meshed with each other. According to the differential mechanism type track combine-harvester gearbox, few braking power losses exist, steering can be more easily achieved, the steering radius is smaller, field operation can be more easily conducted, the turnover probability is greatly lowered, large-radius or pivot steering of a vehicle can be achieved by braking a differential mechanism gear, and the operation is easier and more convenient; no friction plate needs to be used in the leftward-rightward fine adjustment, losses of the friction plate are greatly reduced, the service life of the gearbox is further prolonged, and the reliability of the gear box is further improved.

A wind-driven electric generator with a vertical rotary shaft is composed of a vertical rotary shaft, a wind driven wheel unit consisting of upper and lower wheels, upper and lower fixing discs and upper and lower bearings, a supporting frame consisting of 2N vertical columns, where N=2-6, and 2N wind guiding plates linked to said vertical columns (one to one) and their guiders.

The invention relates to a fire blanket and laying device. The fire blanket and laying device is used for extinguishing and isolating a fire in a fire scene in the grassland, meadow, cornfield, wild flat land or the terrain with mild fluctuation and arranging an earth trail fire line. The fire blanket and laying device comprises a fire blanket and a fire blanket laying device, wherein the fire blanket consists of an inner layer and an outer layer; the outer layer is formed by soft flame-retardant cotton cloth or chemical fabric and a fire glass fiber material; the inner layer consists of fireproof ceramic fine powder; and the fire blanket laying device comprises traveling wheels, a remote controller, a rotating shaft, a receiving antenna, a transmitting antenna, a secondary variable frequency motor and a signal processor. The fire blanket and laying device has the flame-retardant temperature of over 1,000 DEG C, has light weight, is easy to fold, is harmless to the environment, is soft, has toughness, can rapidly cover the large-area fire scene and is particularly suitable for arranging a fire barrier in front of the fire scene.

The invention discloses a collaboration service method aiming at an intelligent terminal, comprising the following steps of: dialing a hot line number of telephone traffic service by the intelligent terminal; selecting an unoccupied agent terminal for the intelligent terminal and building a connection between the intelligent terminal and the agent terminal by the call center of the telephone traffic service; and sending an instruction of requiring to collect relevant information of faults to the intelligent terminal and inquiring fault solution information according to the relevant information of faults from the intelligent terminal and sending the fault solution information to the intelligent terminal by the agent terminal. The invention also discloses a collaboration service system aiming at the intelligent terminal and the intelligent terminal. By means of service collaboration of the technical scheme provided by the invention, the faults complained by users can be solved at the first time; the satisfaction of the users can be enhanced; in the mean time, the labor telephone traffic and the repetitive complaint rate can be decreased.

The invention discloses modified lead nickel niobate-lead zirconate titanate piezoelectric ceramics. The chemical components are as follow: Pb1-xMex(Ni1 / 3Nb2 / 3)0.326(ZryTi1-y)0.674O3+3%PbO+3% NiO+zwt%A; wherein Me represents any one or two of strontium and neodymium, and A represents any one of antimony oxide and yttrium oxide. As strontium or neodymium and antimony or yttrium are doped into the piezoelectric ceramics, a substitution solid solution is formed, and the piezoelectric ceramics with good comprehensive performance of 0.326 PNN-0.647 PZT are obtained. The piezoelectric ceramics have excellent piezoelectric and dielectric properties, the high Curie temperature and a high electromechanical coupling coefficient. The preparing method is simple, raw materials are easy to obtain, and the preparing method has industrial applicability.

The invention discloses a multi-foot walking robot. The multi-foot walking robot comprises a supporting plate, multiple walking devices, a walking power device, a steering power device and a loading platform. The multiple walking devices are arranged on the supporting plate, each walking device is provided with two spaced walking feet, and the two walking feet of the same walking device are configured to alternately advance. The walking power device is connected with the multiple walking devices in order to drive the two walking feet of each of the multiple walking devices to advance. The steering power device is connected with the multiple walking devices in order to drive the multiple walking devices to synchronously steer and rotate around one of the two walking feet of each walking device, and therefore pivot steering of the robot is achieved. The loading platform is rotationally arranged on the supporting plate and used for bearing loads. The walking manner of people can be simulated, excellent gradeability and obstacle crossing capacity are achieved, a reliable physical foundation is laid for high-precision positioning walking, and flexible steering operation is achieved.

The invention discloses a paddy rice harvesting machine. The paddy rice harvesting machine comprises a seedling pulling device, a chassis, a cab, a frame, wheels and a track chain wheel device; the paddy rice harvesting machine is characterized in that the seedling pulling device comprises a header body, a bracket, a seedling pulling roller and a roller supporting arm; the chassis comprises a front steering axle and a rear driving axle; the frame of the paddy rice harvesting machine is provided with a drying oven device; the drying oven device is connected with a grain box by a passage; a solar heat collection panel is arranged at the top parts of the drying oven device and the grain box; a solar charging panel is connected with a storage battery; an outlet is formed in the rear end of the grain box; an inlet is formed in the front end of the drying oven device; the drying oven device is obliquely arranged; the bottom part of the front end of the drying oven device is provided with a water filter screen plate; a temperature sensor is arranged in the drying oven device; a control module is arranged in the cab; a detected temperature signal is sent to the control module by the temperature sensor; the temperature in the drying oven device can be adjusted by the control module; the control module is connected with a touch screen.

The invention discloses a vertical hydrapulper with a drum groove body and spiral backflow plates. The vertical hydrapulper comprises the groove body and a rotor installed at the bottom of the groove body. The groove body is in a drum shape and comprises an upper ellipsoid part and a lower inverted cone part. The inner wall of the groove body is provided with the backflow plates arranged in an ascending spiral line mode. The rotating direction of the backflow plates is opposite to that of the rotor. Due to the groove body structure, the vertical hydrapulper has the good circulating, stirring, shearing and gathering functions on paper in the pulping process, and has the advantages of being small in energy loss, high in pulping efficiency, stable in operation and the like.

The invention discloses a dust cup device of a dust collector. The dust cup device is provided with an air inlet, a primary dust collecting chamber, a secondary dust collecting chamber, a primary cyclone separator, a secondary cyclone separator and an air outlet. The secondary dust collecting chamber surrounds the primary dust collecting chamber. The primary cyclone separator comprises a primary cyclone chamber and a primary cyclone passage. The primary cyclone passage comprises a surrounding wall and a partition plate, and the partition plate is extended from the bottom of the cyclone chamber to the crude dust receiving bottom of the primary dust collecting chamber, is spiral and forms the primary cyclone passage together with the surrounding wall. The secondary cyclone separator comprises a cyclone, a mesh filter and a flow deflector. The flow deflector is spirally extended from the bottom of the cyclone to the top of the cyclone, is positioned between the inner wall of the cyclone and the outer wall of the mesh filter and forms a spiral secondary cyclone passage together with the inner wall of the cyclone and the outer wall of the mesh filter. Because the dust cup device is provided with the primary spiral cyclone passage and the secondary spiral cyclone passage, the speed of the dust can be fully reduced, and the separation effect is good.

The invention discloses a low-frequency hydraulic pulse generating device and method for reservoir temporary-plugging diversion fracturing. The low-frequency hydraulic pulse generating device comprises a cylinder body, an upper connector and a lower connector, wherein the upper connector and the lower connector are connected to the upper end and the lower end of the cylinder body correspondingly; a piston matched with the cylinder body is arranged in the cylinder body; the upper portion of the cylinder body is of a cylinder structure, and the lower portion of the cylinder body is of a cone structure; a throttling device is arranged at the upper end of the piston; a flow guiding through hole is formed inside the piston; a throttling through hole is formed in the center of the throttling device and vertically communicate with the flow guiding through hole, and the diameter of the throttling through hole can become larger under erosion of fracturing liquid; a reset spring is arranged at the bottom of the piston; and a first pressure relief hole , a second pressure relief hole and a third pressure relief hole are further circumferentially formed in the side wall, corresponding to the piston, of the cylinder body. According to the low-frequency hydraulic pulse generating device and method, based on the working displacement ranges of the injection stages of a temporary-plugging diversion repeated hydraulic fracturing operation plugging agent, a prepad fluid, a sand-carrying fluid and a displacing fluid, low-frequency hydraulic pulse output in a hydraulic driving mode is achieved, and the temporary-plugging diversion repeated hydraulic fracturing effect can be improved overall.

A robot platform for wind driven generator blade detection comprises a connecting plate (3), two straight walking devices (1) and a steering device (2). The structures of the two straight walking devices (1) are completely identical, and the two straight walking devices (1) are symmetrically mounted on the two sides of the lower surface of the connecting plate (3); the steering device (2) is mounted in the center of the lower surface of the connecting plate (3); each straight walking device (1) comprises two supporting frames (19), two sliding blocks (12), two guide rails (15), a straight walking top plate (11), a straight walking bottom plate (10), three suction cup assemblies, an obstacle crossing assembly and a push-pull rod (17). The steering device (2) comprises two micro vacuum pumps (24), a steering top plate (21), a steering bottom plate (22), six suction cup assemblies, two obstacle crossing assemblies and a steering engine (23). The robot platform is easy to steer, high in wall face adaptability, small in operation resistance and easy to control and has large application prospects in the field of wind driven generator blade detection.

The invention provides a fracturing production increasing method for deep shale gas, which divides a deep shale gas exploitation area into at least three fracturing units, wherein each fracturing unitcomprises five straight wells and two horizontal wells; the fracturing production increasing method for the deep shale gas comprises the following steps: fracturing the two fracturing units positioned on the two sides; S11, performing hydraulic fracturing operation on the straight wells to generate cracks with single shape in the same direction as the horizontal maximum principal stress; S12, performing pumping bridge plug fracturing operation in staggered sequence on horizontal wells to generate network fractures in a reservoir, and the fracturing fluid adopted by the pumping bridge plug fracturing operation is liquid nitrogen carrying proppant; S2, fracturing the horizontal wells of the middle fracturing unit and a straight well positioned between the horizontal wells to generate network cracks. According to the fracturing production increasing method, complex network fractures interwoven with artificial fractures and branch fractures can be generated, the volume and the seepage area of the reformed reservoir can be increased, and the purpose of improving the recovery ratio of the shale gas reservoir can be achieved.

The invention discloses a snakelike bionic robot based on flexible stretching-retracting joints and belongs to the field of bionic robots. The snakelike bionic robot comprises a robot snake head, a first snake body, a second snake body and a robot snake tail; the robot snake head is connected with the first snake body through the snake head joint; the first snake body is connected with the secondsnake body through the snake body joint; the second snake body is connected with the robot snake tail through the snake tail joint; a first motor is mounted at the front end of the first snake body; asecond motor is mounted at the front end of the second snake body; and a steering motor or a stepping motor can be selected as the first motor or the second motor, and the first motor and the secondmotor rotate synchronously and reversely. The snakelike bionic robot is better in joint flexibility, the motion posture of the snakelike bionic robot is closer to that of a snake, and energy consumption is low.

The invention discloses a flattening robot which comprises a rack, a walking device and a steering device. The rack comprises a bottom frame and an installation plate, and the installation plate is fixed to the bottom frame. The walking device comprises rollers and driving parts, the rollers are rotationally arranged at the bottom of the bottom frame, and the driving parts are arranged on the installation plate and connected with the rollers. The steering device comprises a top plate, a jacking rod, a rotating mechanism and lifting mechanisms. The top plate is located above the installation plate, the jacking rod penetrates the installation plate and is rotationally arranged on the top plate, the rotating mechanism is arranged on the installation plate, the jacking rod is vertically movably arranged at the output end of the rotating mechanism, one ends of the lifting mechanisms are connected to the installation plate, and the other ends of the lifting mechanisms are connected to the top plate. By means of the flattening robot, a steering manner for conducting lifting firstly and rotating secondly is achieved, the robot can conduct pivot steering, the zero-steering radius effect isachieved, and the work covering rate of the robot can be greatly increased.

The invention discloses a robot cleaner driving wheel mechanism which comprises a motor, a left driving wheel, a right driving wheel and a gear case connected with the motor. A first one-way bearing and a second one-way bearing are arranged in the gear case, and the first one-way bearing and the second one-way bearing both can work in a self-locking state and a free state. Through forward and backward rotation of the motor and control of the first one-way bearing and the second one-way bearing, the left driving wheel and the right driving wheel can rotate in different rotation directions. The robot cleaner driving wheel mechanism is simple in structure, reliable, low in cost, economical and practical. Due to the fact that the two driving wheels can rotate and turn at the same time, the rotation radius is small, resistance is low, and turning is easier. The driving wheel mechanism can be applied to various robot sweepers or dust collectors or similar cleaning machines.

The invention discloses a steering device for a water-jet propulsor, and belongs to the technical field of water-jet propulsion. The steering device comprises a steering nozzle and a steering drive mechanism, wherein the steering drive mechanism comprises a steering handle and drive assemblies; the steering handle comprises a first connecting part and a second connecting part; one end of the second connecting part is connected with the middle of the first connecting part, and the other end of the second connecting part is fixedly connected with the water outlet end of the steering nozzle; the middle of the first connecting part and the steering nozzle are coaxially hinged to the water outlet end of a guide vane nozzle; the steering drive mechanism comprises two drive assemblies; each drive assembly comprises cylinders and connecting rods; one end of each of the two connecting rods is connected with the corresponding cylinder, and the other end of each of the two connecting rods is connected with both ends of the first connecting part, so that the cylinders can be controlled to stretch out and draw back; both ends of the first connecting part are pushed and pulled by the corresponding connecting rod, so that the steering handle is rotated, and the steering nozzle is rotated by the rotation of the steering handle; the orientation of the steering nozzle is changed, so that the water current jet direction is changed and the steering of a ship is achieved.

The invention provides an automatic planting machine. The automatic planting machine comprises a rack, a conveying device which is arranged on the rack and is used for storing and conveying germchits, a planting device for receiving the germchits of the conveying device and planting, and a reinforcing device for covering soil and reinforcing the planted germchits, wherein the conveying device is used for conveying the germchits to the planting device; and the planting device is used for planting the germchits into the soil and covering the soil on roots of the germchits through the reinforcing device. The automatic planting machine is simple in structure, small in size and high in automation degree; a whole planting process can be automatically finished; the planting process is simplified by adopting a direct inserting type planting manner; the planting efficiency is extremely improved; and the automatic planting machine is suitable for planting a plurality of types of plants and has a wide application range. Furthermore, the automatic planting machine is small in size, easy to steer and is relatively flexible to move; and moreover, the automatic planting machine is driven by electric power and diesel oil is not used as fuel, so that the automatic planting machine is economical and environment-friendly.

The invention relates to a window cleaning robot control system and method. The system comprises a remote controller, a communication unit, a manipulator, a cleaning execution unit, a camera shootingunit and a sensor unit. The remote controller is in communication connection with the manipulator through the communication unit; the remote controller is further connected with the cleaning executionunit, the camera shooting unit and the sensor unit. The manipulator is used for remotely controlling the window cleaning robot; the communication unit is used for communication signal transmission between the manipulator and the remote controller; the camera shooting unit is used for shooting the working environment of the window cleaning robot to obtain a cleaning image; the sensor unit is usedfor collecting environment information of the window cleaning robot. The cleaning execution unit is used for receiving an execution signal of the remote controller so as to perform window cleaning work; and the remote controller is used for receiving a control signal of the manipulator or controlling the cleaning execution unit to wipe the window according to the cleaning image. Therefore, the robot can work high above the ground more safely, and the cleaning efficiency is improved.

The present invention relates to a mascara brush for women to care for the eyelashes. In particular, the present invention relates to a mascara brush with controllable brush length of which the brush can be easily lengthened and shortened by simply turning a rolling grip, which can be achieved by a simply structure using simple turn of a screw and related operations, because users select a long brush or a short brush in accordance with their preferences.

Disclosed is a double-clutch directly controlled stepless speed regulator for a tracked vehicle. Double clutches are connected with a double-clutch power input part. One part of power of the double-clutch power input part is output through a power output shaft speed reduction part, the other part of the power of the double-clutch power input part is transmitted to a stepless speed regulation part, the power output shaft speed reduction part transmits the power to an external operating part through a power output shaft part, the stepless speed regulation part transmits the power to a differential planetary transmission part, then the differential planetary transmission part transmits the power to drive a left track drive part and a right track drive part, a power output shaft gear shifting part is used for controlling switching of gear output of the double-clutch power input part for the power output shaft speed reduction part, and an external control connection part is used for achieving directly controlled steering. A double-clutch self-locking type hydraulic motor is adopted to control a planet carrier of a planetary gear transmission mechanism so as to achieve mechanical direct control and hydraulic stepless speed regulation, the switchover efficiency is high, integrated control is easy to implement, transmission efficiency is high, operation is easy and convenient, and steering precision is high.