492results about How to "Smooth turning" patented technology

The invention relates to a path planning method, and specifically relates to a time window-based task segmentation multi-AGV path planning algorithm. The method comprises steps of first, generating anAGV working environment model; second, generating a task, and decomposing the task into multiple secondary stages according to different task types; and third, assigning the task by a task assigningmodule according to task priorities, picking the task out by a scheduling system from a high-priority queue, then determining which stage the task is in, if the task is not executed, assigning the task to closest AGV by using an improved A* algorithm, and setting the task state in first secondary stage; if the task is in the second or after stages, and planning a non-conflict shortest path for theAGV bound with the task by using the time widow algorithm by the scheduling system. Shortest and fastest paths are planned by using the improved A* algorithm and time window algorithm, so that the working efficiency is improved and calculation errors are reduced.

The invention discloses a pipeline robot walking device capable of being automatically adapted to diameters. A variable-diameter mechanism of the pipeline robot walking device is structurally characterized in that a lead screw driven by a variable-diameter motor is installed on the axis of a barrel body, a nut of a crisscross moving frame is matched with the lead screw in a screwed mode, the end of the crisscross moving frame extends out of the barrel body, parallelogram connecting rod assemblies are arranged on positions, corresponding to ends of the crisscross moving frame, outside the barrel body, one end of each parallelogram connecting rod assembly is hinged to the barrel body, and variable-diameter elastic supporting rods are hinged to the ends of the parallelogram connecting rod assemblies and the ends of the crisscross moving frame respectively. A walking mechanism of the pipeline robot walking device is structurally characterized in that wheel cages are arranged corresponding to the parallelogram connecting rod assemblies respectively and are hinged to the other ends of the parallelogram connecting rod assemblies, a plurality of walking wheel assemblies are installed on walking wheel frames, the walking wheel frames elastically stretch out of the wheel cages in the radial direction, and guide wheel assemblies are arranged at the two ends of the walking wheel assemblies respectively. The pipeline robot walking device can walk in a square pipeline as well as a circular pipeline, can successfully pass through corners of the pipelines and can be used for welding, installing, detecting and maintaining the pipelines and carrying out other operations after being additionally provided with relevant auxiliary tools.

An inspection robot comprises a supporting frame body, a driving mechanism and a guiding wheel mechanism closely stuck to the orbital wall, wherein the driving mechanism comprises a driving device with adjustable actuating speed, a differential mechanism and at least two groups of marching wheels. The driving device is connected with the differential mechanism in a transmission mode, the differential mechanism is arranged between the marching wheels and is connected with the marching wheels in a transmission mode, and the driving device, the differential mechanism and the marching wheels are all arranged on the supporting frame body respectively. The guiding wheel mechanism closely stuck to the orbital wall comprises at least two groups of guiding wheel components which are arranged on the supporting frame body. According to the inspection robot, the driving device drives the differential mechanism and the differential mechanism drives the marching wheel so that multi-driving can be achieved, uphill slipping and difficulty in repeated positioning can be avoided, braking performance can be improved and turning capability can be improved, and the guiding wheel mechanism is closely stuck to the orbit so that waggle in the robot can be avoided, shock absorption and cushioning function which absorb goggling and shaking of the robot caused by unflatness of the orbital wall can be achieved, and stability and security in the operation of the inspection robot can be improved.

The invention relates to a method of finishing bridge swivel design and construction through arrangement of an auxiliary supporting system in an extremely asymmetric state. The method mainly aims at avoiding the situation that swivel balance is difficult to achieve only depending on arrangement of a balance weight at the end of a beam when the imbalance bending moment of a swivel bridge is relatively large. According to the method, besides a swivel center spherical hinge, the auxiliary supporting system is arranged in the position certain distance away from the center spherical hinge at the bottom of a long swivel arm side beam and matched with a balance weight at the top of a short swivel arm side beam to act jointly, so that balance and stability in the imbalance structure swivel processare kept. The auxiliary supporting system is arranged below a main beam in the position corresponding to the auxiliary supporting system, a beam bottom supporting column is arranged above an idler wheel trolley, and a main beam and the idler wheel trolley are connected through a bogie frame. The idler wheel trolley is supported on an arc-shaped track beam, and a rack is welded to the track beam.Power driving is supplied by a variable frequency motor and a speed reducer, transmission is conducted through a gear and the rack, the bogie frame is driven by a speed reducer frame, the idler wheeltrolley is driven by the bogie frame to move along the track beam, and therefore the main beam is driven to rotate.

The invention discloses a closed-type rotary hydraulic system for a crane. The system comprises a closed-type hydraulic pump (10) and a rotary motor (20), wherein an oil outlet of the closed-type hydraulic pump (10) is connected with an oil inlet of the rotary motor (20); and an oil outlet of the rotary motor (20) is connected with an oil inlet of the closed-type hydraulic pump (10). The system is characterized by further comprising a buffering damper (30), and the buffering damper (30) is connected in parallel with the rotary motor (20) on a hydraulic oil line. The system has very reliable stability in the starting, stopping and rotating processes, and also has a smaller hydraulic structure. The invention also discloses a crane which is provided with the closed-type rotary hydraulic system.

The invention discloses a multifunctional micropile drilling machine, comprising a base plate, a platform which is fixed on the base plate, a covering element and an amplitude variation mechanism which are arranged on the platform, and a drilling and lifting device which is connected with the amplitude variation mechanism, wherein a hydraulic system and a main control system are arranged in the covering element; the amplitude variation mechanism comprises a turning pair A and a turning pair B; the turning pair A drives the amplitude variation mechanism and the drilling and lifting device to rotate relatively to the platform by + / - 90 degrees; and the turning pair B drives the drilling and lifting device to rotate relatively to the amplitude variation mechanism by 360 degrees. The turning pair A of the multifunctional micropile drilling machine does not turn along with the platform and just drives the amplitude variation mechanism and the drilling and lifting device to turn, so that the turning moment is reduced and turning becomes quite steady; the turning pairs employed also are lower than the turning pair employed to drive the whole platform in power so that the cost is saved; the turning pair B is capable of rotating by 360 degrees; and in contrast with the similar drilling machine employing an oil cylinder for rotation, the multifunctional micropile drilling machine has the advantages that the rotation angle is large and positioning of drilling is also quite accurate.

The invention discloses a fish sorting and conveying system. The system comprises a sorting device, an outlet of the sorting device is connected with a multi-station graded conveying device, an inclined support is arranged on the upper portion of the sorting device, multiple fish slipping shafts inclining towards the lower right part are arranged above the inclined support, the distance between the adjacent fish slipping shafts is gradually increased from upper left to lower right, fish guide plates extending in the front and back direction is arranged below the inclined support, the multiplefish guide plates are arranged from left to right, a buffer conveying belt is arranged below each fish guide plate, enclosure plates are arranged on the three faces of each buffer conveying belt, anda buffer conveying belt gate capable of being opened and closed is arranged on the front side of each buffer conveying belt. A fish slipping partition board extending in the same direction of the corresponding fish slipping shaft is arranged over each fish slipping shaft, and arc tops with the small top and the large bottom is arranged on the top of each fish slipping partition board; sorting areabaffles are connected to the outer sides of the fish slipping partition boards closest to the front and closest to the back. According to the system, continuous sorting is achieved according to the size of the fish, the speed is high, efficiency is high, and the fish cannot be damaged.

An ascorbic acid-based composition and related method for the treatment of aging or photo-damaged skin is disclosed. The composition includes water and ascorbic acid, at least a portion of which has generally been pretreated by being dissolved under relatively high temperature and concentration conditions. The composition typically includes at least about 5.0% (w / v) ascorbic acid and may advantageously be formulated to have a pH above 3.5. Generally, the composition also includes non-toxic zinc salt, tyrosine compound, and / or pharmaceutically acceptable carrier. In addition, the composition may include an anti-inflammatory compound, such as aminosugar and / or sulfur-containing anti-inflammatory compound. The topical composition may be in the form of a serum, a hydrophilic lotion, an ointment, a cream, or a gel.

A brake control device that controls braking forces applied to wheels to stabilize the behavior of a vehicle turning a corner, and includes a turning condition detection unit detecting a turning condition of the vehicle; a braking amount setting unit setting braking amounts for the respective wheels based on the turning condition detected by the turning condition detection unit; a brake control unit applying braking forces to the wheels according to the braking amounts set by the braking amount setting unit; and a road surface friction coefficient estimation unit estimating a road surface friction coefficient of the road on which the vehicle is running. The braking amount setting unit changes upper limits of the braking amounts for the respective wheels according to the road surface friction coefficient when the vehicle is in a center differential lock mode or a direct four-wheel drive mode.

The invention discloses a swivel and closure construction method for a large-span continuous beam crossing an existing station. A constructed large-span continuous beam adopts a reinforced concrete box beam crossing the existing station and the front end and the rear end of a span are supported on a second buttress and a third buttress respectively; the swivel and closure construction process comprises steps as follows: step one, swivel system construction: a swivel system is constructed at the bottom of each of the second buttress and the third buttress and comprises a lower support disc, an upper rotating disc, a bridge swivel spherical hinge and a swivel traction system, multiple support legs are arranged at the bottom of the upper rotating disc, and an annular slide way allowing the support legs to slide is formed on a lower bearing platform; step two, construction of the second buttress and the third buttress; step three, construction of a front side beam body and a rear side beam body; step four, plane swivel construction; step five, side span closure construction; step six, mid-span closure construction. According to the method, the steps are simple, the design is reasonable, the construction is simple and convenient, the use effect is good, the swivel and closure construction process of the large-span continuous beam crossing the existing station can be completed simply, conveniently and rapidly, and the construction process is safe.

An expansion valve used on refrigeration system is prepared as sheathing coil on valve body, erecting rotator in valve body and corresponding it to said coil, setting the positioning unit in valve body and coordinating it with said rotator, setting lift mechanism in valve body and coordinating it to said rotator, setting space unit in valve body and using it to limit lifting range of said lift mechanism, erecting top end of needle valve in the second cavity at bottom of lift mechanism.

The invention belongs to an automatic soft fabricating and assembly system in stream transport, product producing and assembling fields. The character lies in: the platform is arranged with work transmission line, manipulator and work bank. The work transmission line is flat and frame type structure, and it is formed by connecting 3-6 line transmission units, the line is arranged with work tray. The structure is simple and reasonable, stable and reliable, and the precision is high.

The invention discloses a plane rotation construction technique for a steel truss girder for existing bridge spanning construction. A main girder of the constructed bridge is a steel truss girder spanning the existing bridge and obliquely crossing with the existing bridge; the technique comprises the following steps: firstly, constructing a high-altitude steel truss girder assembling platform which comprises a temporary buttress and a plurality of temporarily assembling brackets; secondly, assembling the steel truss girder at high altitude and removing the temporarily assembling brackets; thirdly, installing a steel truss girder rotation positioning device and a slippage system; before rotating the steel truss steel, firstly installing the steel truss girder rotation positioning device and the slippage system; fourthly, conducting plane rotation on the steel truss girder; and fifthly, dropping the girder in place. The construction technique is simple in steps, convenient to construct, fast to construct, safe and reliable in construction process and less in interference on the existing bridge, and can effectively solve the problems that the construction field is limited, the construction can not be normally conducted, the travelling interference on the existing bridge is large, the construction risk and hidden hazard are large and the like in construction with the existing in-situ falsework method and the dragging method.

The invention relates to a system that an inverter drives four motors asynchronously and simultaneously to realize the speed regulation of a rotor by variable frequency. The system comprises a motor unit, a rectifier unit, a current limiter unit, a chopper unit, an isolator unit, an active inverter, an A / D converter unit, a signal processor unit, a current detector unit and a voltage detector unit and adopts the inverter control theory and the CPU control technique to conduct the on-line control to the four motors. The voltage output by one inverter is served as the additional counter-electromotive force for each motor; PWM signals outputted by each actuator are used for effectively realizing the continuity and the disconnection of each chopper so as to realize that a crane can fulfill four actions of lifting, variation of amplitude, revolving and traveling. The system provided by the invention simplifies the circuit, reduces the volume and the cost and improves the reliability; when the crane is on the rise, extra power can always be fed back to the motor through the same inverter so as to ensure that when the crane descends, the motor is in a state of power generation and the generated power energy is again fed back to the motor or a power grid through the same inverter, thus realizing energy recovery and conservation.

The invention relates to a working table structure used in an improved vertical type grinding machine. The working table structure has the advantages of high precision, good rigidity, strong supporting capacity and abrasion resistance and consists of a flange, an electric magnetic chuck and a belt pulley; the flange is provided with the electric magnetic chuck and installed on a shackle which is mounted at the machine body by a support, the exterior of the shackle is sheathed with the belt pulley, the central bottom of the flange is installed on the machine body by a support; the working table structure is characterized in that: the support between the shackle and the machine body is a closed hydrostatic guideway support, while the support between the central bottom of the flange and the machine body is a radial hydrostatic bearing support.

The invention provides an upper stopper of a zipper and a zipper with the same. The upper stopper of the zipper is used for stopping a puller slider on the zipper and comprises a quick-unzipping stopper and a limiting stopper, wherein the limiting stopper comprises a limiting part, the quick-unzipping stopper comprises a fixed part and an elastic sheet, the fixed part is fixed on the upper end of a zipper belt, one end of the elastic sheet is connected with the fixed part, the elastic sheet is provided with a top part in a direction far away from the fixed part, the height of the top part on the fixed part corresponds to the distance between upper and lower wing plates of the puller slider so that the elastic sheet can elastically deform to stop the puller slider. The upper stopper of a zipper and the zipper with the upper stopper have the advantage of high opening speed.

The invention discloses an automobile steering assisting aerodynamics external member which comprises two tail wing structures, two lifting passages and a hydraulic pipeline, wherein the tail wing structures are positioned in the lifting passages, and comprise main wings, auxiliary wings and driving mechanisms; the main wings and the auxiliary wings are arranged parallelly; the main wings are positioned below the auxiliary wings; the front ends of the auxiliary wings are close to the tail ends of the main wings; end plates are respectively arranged on the same side ends of the main wings and the auxiliary wings; the main wings are fixedly connected with the end plates; the auxiliary wings are rotationally connected with the end plates; the driving mechanisms comprise main wing cylinders, auxiliary wing cylinders and bases; rotating assisting cylinders are arranged on the bases; the hydraulic pipeline comprises a hydraulic pump, a main wing pipeline used for connecting or disconnecting the main wing cylinders synchronously, an auxiliary wing pipeline and a rotating assisting pipeline used for independently connecting or disconnecting each rotating assisting cylinder; strip-shaped through holes are formed in the front sides of the end plates and positioned above the auxiliary wings. The invention aims to provide the automobile steering assisting aerodynamics external member, which can adjust lower pressure and air resistance on the left side and the right side of the automobile tail to improve the adhesion property of an automobile and reduce tire load.

The invention discloses a major structure of an energy-saving motion device which consists of an introduction orifice that has an inner layer and an outer layer, a fluid-layered channel, a loop hole channel, a lead-out orifice channel, and combines with installed windshields, doors and baffles into a car that has novel model and convenient production, and saves cost; an introduction orifice of lateral fluid that is arranged on a car body and a balancing introduction orifice in the bottom of the car are communicated with a channel, a motor is arranged inside the lead-out orifice, a rotating head that is driven by the motor and a wind indicator that is driven by the fluid are arranged in the channel passed by the fluid, thus driving an electric generator to charge a fuel battery for drivingthe motor. The motor, the rotating head, an infinite variable speed controller, a speed reducer, a compensating gear, two semi-shafts and wheels are connected by control boards; the motor drives the wheels to rotate, and eliminates lifting resistance and reduces fluid resistance; the device has enhanced adherence between the wheels and the ground, thus increasing security and stability; the device major structure is formed by channels, thus saving the structures such as pistons, accelerator pedals and so on, and consequently the invention leads the weight to be lighter than the weight of the existing cars by one fourth and saves over two-thirds energy. .

The invention discloses an automobile tail part double-turbulence device, which comprises two tail wing structures, an air flow channel and a hydraulic pipeline, wherein the tail wing structure is located at the tail end of the air flow channel and comprises a main wing, an aileron and a driving mechanism, the main wing is located below the aileron and provided with a plurality of upward extending aileron positioning plates, the upper ends of the aileron positioning plates are hinged with the tail end of the aileron, the front end of the aileron is close to the tail end of the main wing, the middle part of the main wing is provided with a rotating plate which is vertically arranged and can rotate relative to the main wing, the other end of the rotating plate is hinged with the aileron, the driving mechanism comprises an aileron cylinder and a base, the base is provided with rotating auxiliary cylinders, and the hydraulic pipeline comprises a hydraulic pump, an aileron pipeline and rotating auxiliary pipelines used for independently switching each rotating auxiliary cylinder. The invention aims to provide a device which can regulate down pressure and air resistance at the left side and the right side of an automobile tail part so as to improve the automobile adhesion performance and reduce the tire load.

The invention discloses a rail transit system, which comprises a runway track and a vehicle running on the runway track, wherein the runway track is provided with a first vehicle wheel running face, guide rails and a second vehicle wheel running face which are arranged in a form shaped like a Chinese character 'tu' in turn; the two sides faces of each guide rail are main guide faces; the side faces of the two running faces are provided with side guide faces; the vehicle used in combination has power wheels and guide wheels; the power wheels run on the first vehicle running face and the second vehicle running face respectively; the guide wheels run on the main guide faces and the side guide faces respectively; and wires are arranged on the upper surface of the guide rails. Compared with the currently used straddle type rail transit system, the system has the advantages that: the vehicle body and center of gravity of a used vehicle are low; the accelerating performance and braking performance are high; the turning is smooth; and the running is more stable.

Provided are a conical spring stiffness changing and wrinkle and cracking prevention method, and a product. A conical spring comprises an inner cone, a rubber body, and an outer cone. The rubber body surrounds the inner cone. The outer cone surrounds the rubber body. The rubber body, and the inner cone and the outer cone form a rubber metal spring arranged in a conical manner. The conical spring is characterized in that a rubber body upper rubber profile and a rubber body lower rubber profile of the conical spring use a multisection structure form. The rubber body upper rubber profile is a multisection downhill structure, and the rubber body lower rubber profile is a multisection uphill structure. Through changing the shape, slope, and length of each section, and the number of sections in the multisection downhill structure of the rubber body upper rubber profile and the multisection uphill structure of the rubber body lower rubber profile, the size of stiffness changing and the position of stiffness changing of the conical spring are adjusted, and adjustment of multiple stiffness changing is realized through controlling the number of multisection.

The invention relates to a virtual character turning implementing method and device. The method includes the following steps that a virtual character turning angle is obtained; the preset fixed turning time is obtained; the average angular speed of the virtual character is worked out according to the turning angle and the preset fixed turning time; the virtual character is controlled to conduct turning at the average angular speed. According to the virtual character turning implementing method and device, the turning angle of the virtual character is obtained, the preset fixed turning time is obtained, the average angular speed is worked out, the virtual character is controlled to conduct turning at the average angular speed, constant speed turning is conducted in the turning process, smooth turning can be achieved, the unsmooth phenomenon in the turning process is avoided, the fluency of images is improved, the average angular speed is high when the turning angle is larger, quick and smooth turning can be achieved, turning can be achieved as well when the turning angle is small, and turning is more precise.

The invention relates to a car tail door lock unlocking mechanism. An unlocking lever in a tail door lock is installed on an unlocking lever shaft. The car tail door lock unlocking mechanism is characterized in that a locking device is included, and the locking device is installed on the tail door lock through a locking device installation plate and comprises a micromotor, a transmission gear train and a moving rod; the micromotor drives the moving rod to do reciprocating motion through the transmission gear train, the moving rod is connected with the tail end of the unlocking lever in the tail door lock through a pin shaft, and the front end of the unlocking lever is provided with a pushing block used for pushing a pawl in the tail door lock. The car tail door lock unlocking mechanism is simple, ingenious and reasonable in structure and convenient to operate and can effectively ensure the life safety of passengers.

The invention discloses a drifting guide window which comprises drifting window sashes, wherein the drifting window sashes are arranged in a left-side window frame and a right-side window frame communicated with each other; guide rails are arranged at the upper and lower ends of the left-side window frame and the right-side window frame; the drifting guide window further comprises a supporting device, a left guide piece and a right guide piece; the supporting device is arranged at the upper end of the drifting window; the left guide piece is arranged at the lower end of the drifting window; and the right guide piece is in bilateral symmetry with the left guide piece. The drifting guide window provided by the invention is less in types of connecting pieces and simple in structure, the connecting pieces are difficult to deform and clamp, the window has a labor-saving effect and is convenient to close and stable to open, the connecting pieces are easy to manufacture and mount, the drifting window is low in production cost, the window can be opened to ventilate on rainy days, and the safety and the sealing performance are excellent.

The invention relates to an automobile front hood hinge for articulating an automobile front hood with a front cabin bracket. The automobile front hood hinge comprises a fixing seat and a rotating arm, wherein, the fixing seat is hinged with the rotating arm through a hinge pin, and the hinge pin is composed of a pin shaft and a self-lubricating bushing; the rotating arm is equipped with a retaining arm, and the retaining arm is positioned right ahead of the vertical plate of the fixing seat when the hinge is in a closed status; the vertical plate of the fixing seat is equipped with a limit groove, the hinge board of the rotating arm is equipped with a limit boss, and the limit boss is positioned in the limit groove; and the fixing seat is equipped with a mounting bracket, and projection welding nuts are welded on the mounting bracket. The front hood hinge is durable and has better quality and stronger use function.

The invention discloses a load-sensitive rotation buffer valve and a crane rotation hydraulic system. A middle path of a rotation reversing valve is sequentially connected with a guide oil port of a three-way pressure compensation valve and an oil inlet of a constant flow valve through an LS feedback oil path, an oil inlet of the three-way pressure compensation valve is communicated with an oil inlet of a valve body, an oil outlet of the three-way pressure compensation valve is communicated with an oil returning opening of the valve body, an oil outlet of the constant flow valve is divided into two paths, one path is directly connected with the oil returning opening of the valve body, the other path is communicated with an oil inlet of a first one-way valve and an oil inlet of a second one-way valve at the same time, a speed adjusting valve is formed by the three-way pressure compensation valve and the rotation reversing valve, flow adjustment of a work oil port A and a work oil port B is achieved, flow is output proportionally, influences of the load are avoided, in the whole operation process, action is stable, fast and slow action is avoided, stable opening is achieved, during stopping, pressure impact is small, and a crane cannot rotate and swing.

The invention discloses an electric control selection valve and an active bottle control and distribution method using the same. The electric control selection valve is combined by connecting an electric control driving device and a selection valve, wherein the inside of the electric control driving device is provided with a metal sealing film which divides the interior of the electric control driving device into an upper space and a lower space, and the electric control driving device is also provided with a driving gas outlet; and the body of the selection valve is provided with a main air inlet and a main air outlet. The method comprises that a plurality of fire-extinguishing and storing bottles and the electric control selection valves are arranged, and the main air outlet of each electric control selection valve is respectively opposite to a protection area; and one of the fire-extinguishing and storing bottles is used as an active bottle, and the other fire-extinguishing and storing bottles are used as passive bottles. The electric control selection valve has the advantages of reliably and steadily opening a valve port, and combining the electric control driving device and the selection valve into a whole. The method has the advantages of reducing control links, improving the control reliability, using one fire-extinguishing bottle as the active bottle, turning on the selection valve and the passive bottles thereof according to needs, and directly starting by electric control.

The invention discloses a novel winder for a dust collector. The dust collector comprises an upper dust collector cover (10), wherein the winder comprises a winding wheel disk (1); the upper dust collector cover (10) is fixedly provided with a winder actuating bracket (20); an actuating arm (21) is arranged in the winder actuating bracket (20); one end of the actuating arm (21) is rotatably provided with a brake positioning wheel (5); the brake positioning wheel (5) is engaged with a notch at the periphery of the winding wheel disk (1); the other end of the actuating arm (21) is fixedly connected with a winder brake key (3); and one end of the winder brake key (3) adjacent to the actuating arm (21) is hinged with the winder actuating bracket (20). By increasing the position selection space for the winder brake key, the winder is suitable for various types of dust collectors, has high compatibility, can also increase the stability of the power line loop and has simple structure and great significance in production practice.

The invention discloses a closed rotary control system and a crane. Stable starting and stopping of the rotary system are achieved through a dynamic buffer control valve and a dynamic brake. Accordingto the percentage of the loading moment, the rotary maximum speed is controlled, meanwhile, the rotary speed still linearly changes in the later stroke of a control handle, and controllability in thespeed limiting speed is improved. The current of a pump displacement swing angel control valve is compensated according to the handle angle change rate, the engine rotating speed or the current of the pump displacement swing angel control valve is compensated according to the change rate of an accelerator pedal, and the control process is stably controlled. Free sliding and rotating speed compensation is carried out on the length of a telescopic arm, and stable control of free sliding and rotating is achieved. The heavy load and high speed work conditions compensate the change response process of the rotary speed, and stable speed changing is achieved. The pump displacement swing angle is monitored, safety control is achieved, and the situation that after the handle returns, the pump displacement swing angle does not return to zero, the dynamic brake is damaged, or the system is in a high-pressure overflow state is avoided.

The invention discloses a flushing device of a low-water-tank toilet bowl. The flushing device is arranged in a water tank of the toilet bowl, and comprises a drainage valve and a brush ring ejector,wherein the drainage valve comprises a valve seat, a switch component and a water stop component; the brush ring ejector comprises a brush ring pipe, an ejecting pipe and a switching mechanism for opening and closing a water path of the brush ring pipe; the switching mechanism comprises a switching baffle plate, a switching float and a limiting piece; the switching baffle plate is rotatably arranged in the brush ring pipe; the switching float gets linked with the switching baffle plate; and the limiting piece is linked with the water stop component. According to the flushing device provided bythe invention, the water path of the brush ring pipe is opened and closed under the control of the switching baffle plate, and the switching baffle plate is controlled by the switching float and thewater stop component while the switching float and the water stop component are controlled by a water level in the water tank, which is to say, the opening and closing of the water path of the brush ring pipe are actually controlled the water level of the water tank and are less associated to water intake pressure of a water intake valve; therefore, the water path of the brush ring pipe of the flushing device provided by the invention is more stable in opening and closing.