67results about How to "Prevent rolling phenomenon" patented technology

The invention provides a control system and pre-start method of a blade electric vehicle. The method comprises the steps that 1, the vehicle state information is collected; and 2, whether to take the pre-start strategy or not is determined according to the vehicle state information. A motor gives out a small calibrated torque before the vehicle starts, so that gears of a transmission system of the vehicle are all in an engaged state, various start patterns start according to the intention of a driver, and shaking caused by impact to the transmission system of the vehicle is reduced; and meanwhile, mechanical abrasion can be reduced, and start noise can be lowered. There is no need to change the structure of an existing vehicle or additionally arranging hardware equipment like sensors, and implementation is easy. Through the control method, the vehicle can start quickly and stably, and meanwhile, coasting during starting of the vehicle can also be avoided.

The invention relates to an anti-sliding control system for an electric automobile, which comprises a motor controller, as well as a motor, an accelerator pedal, an accelerator pedal sensor, a brake pedal, a brake pedal sensor, a motor current sensor and a rotary transformer that are all connected with the motor controller; accelerator pedal signals, brake pedal signals, motor current data signals, motor rotating speed data signals, rotating-transforming signals and other data of the motor controller are all collected and processed by a DSP (Digital Signal Processor) data processor; the motor is controlled by the motor controller; the signals are sent to a DSP chip data processor through all sensors, so that ramp conditions for the automobiles can be judged; svpwm (space vector pulse width modulation) duty ratio is adjusted through the controller; driving current is adjusted, so that torque of the automobile borne due to a slope is counteracted by motor driving torque; and the automobiles are prevented from sliding, so that traffic accidents are greatly reduced, and meanwhile the operation burden of starting the automobile again after a driver brakes the automobile during uphill and downhill is reduced.

The invention provides a neutral gear control method for an automatic transmission. The method comprises the following steps that when the neutral gear control function of the automatic transmission is in an activated state, an automatic transmission control unit collects the information including the pressure of a braking main cylinder, the state of a braking pedal and whether the automatic parking function is in the activated state or not. When the pressure of the braking main cylinder is smaller than the pressure threshold value P3 of the neutral gear control function and the automatic parking function is in a non-activated state or when the braking pedal is in a non-stepped state and the automatic parking function is in the non-activated state, the automatic transmission control unit controls the neutral gear control function to retreat from the activated state.

The invention provides a rotary hydraulic system and construction machinery. The rotary hydraulic system comprises a rotary motor, a brake oil cylinder, a main valve, a shuttle valve and a brake anti-lock valve. The brake anti-lock valve includes a first check valve and a hydraulic-control selector valve. An oil return port T of the main valve is communicated with a hydraulic control end Y of the hydraulic-control selector valve. An oil inlet port P is communicated with an oil return port of the first check valve and a port B of the hydraulic-control selector valve synchronously. A hydraulic control end X of the hydraulic-control selector valve is communicated with a port A of the shuttle valve. The port A of the shuttle valve and an oil outlet port of the first check valve are communicated with the brake oil cylinder synchronously. The main valve is communicated with the oil inlet port P and the oil return port T while a valve core is positioned at the center. When a rotary mechanism is rapidly stopped, the hydraulic-control selector valve is closed, the oil inlet port P of the main valve is communicated with the brake oil cylinder through the first check valve to prevent a brake from being closed, and accordingly, only if the rotary mechanism shakes, the brake is not locked, sense of impact is greatly reduced, and operational performance and operational comfort of rotary actions are further improved.

The invention discloses an identification method for a ramp gradient. The method comprises the following steps: according to a vehicle driving force formula, calculating by using parameters and a speed of a vehicle, to obtain a driving force, a rolling resistance, an accelerating resistance and an air resistance of the vehicle, acquiring a final gradient resistance, and according to the gradient resistance, calculating to obtain a final value of slope. The above technical scheme is used, the vehicle is capable of accurately identifying the ramp gradient by itself, and according to the gradient, judging whether to open an electronic parking function and an electronic parking automatic release function, while the vehicle is started in a half-ramp, effectively preventing a vehicle sliding phenomenon, improving product quality, and providing maximum guarantee for travelling safety of a user.

The invention provides a planet type hybrid electric vehicle parking charging control method. According to the planet type hybrid electric vehicle parking charging control method, the active control of a driver over the power battery charging power can be realized, meanwhile, a brake is controlled by a VCU control brake to ensure the safe parking when power generation is carried out, and a varietyof measures are adopted to avoid the possible safety problems caused by abnormal charging. The planet type hybrid electric vehicle parking charging control method comprises the steps that (1) parkingcharging condition judgment is carried out, specifically, whether parking charging conditions are met or not is judged according to a vehicle state and a driver input signal; (2) maximum allowable power generation power calculation is carried out, specifically, the maximum allowable power generation power of a system is calculated and obtained according to constraint factors of the dynamical system; (3) charging control is carried out, and the charging control comprises braking force control, power generation power analysis and control over an engine and motors; and (4) abnormal charging treatment is carried out, specifically, unusual conditions appear in the charging process are subjected to corresponding safe treatment.

The invention discloses a lifting truck with a safety protection function for city line maintenance. The lifting truck with the safety protection function for city line maintenance comprises a bottomplate and a working table, wherein an upper guide-track groove and a lower guide-track groove are fixedly connected to the outer surfaces of the same sides of the working table and the bottom plate; multiple inner hinge frames and outer hinge frames hinged in the middle parts are arranged between the working table and the bottom plate; one ends of the inner hinge frames are rotatably connected with the working table; the other ends of the inner hinge frames are slidably connected into the upper guide-track groove; one ends of the outer hinge frames are rotatably connected with the bottom plate; the other ends of the outer hinge frames are slidably connected into the lower guide-track groove; and an electric hydraulic pump is fixedly arranged on the lower surface of the bottom plate and isconnected onto one end of a hydraulic cylinder through a hydraulic pipeline. According to the lifting truck with the safety protection function for city line maintenance provided by the invention, theloss of life and personal injury caused by accidental occurrence is avoided, the operation safety is further improved, a truck body can be prevented from displacing and shaking, moving wheels can befirmly fixed without being moved, the occurrence of the phenomenon of truck sliding during operation is prevented, and the safety of the truck body is improved.

The invention discloses a sliding-preventing method and sliding-preventing hydraulic control system for a traveling device, and belongs to the technical field of hydraulic control systems. The sliding-preventing method for the traveling device includes the following steps that the hydraulic control system is arranged on the traveling device, the hydraulic control system comprises a hydraulic mainoil way, a bidirectional variable hydraulic pump, a bidirectional hydraulic motor, an electric control unit and a planet gear transmission mechanism, the planet gear transmission mechanism comprises agear ring, a sun gear, a planet gear and a planet carrier, and the gear ring, the sun gear and the planet carrier are arranged coaxially and rotationally; when the traveling device stops, the electric control unit collects the rotating speed of the bidirectional hydraulic motor and the rotating speed of the gear ring and automatically calculates the output rotating speed of the planet carrier, and if the output rotating speed of the planet carrier is not zero, the electric control unit sends a control signal to the bidirectional variable hydraulic pump to change the displacement of the bidirectional variable hydraulic pump until the output rotating speed of the planet carrier is zero. According to the sliding-preventing method for the traveling device, the mechanical zero point can be accurately controlled, and sliding of the traveling device can be effectively prevented.

The invention relates to a vehicle movement direction control mechanism used for controlling a movement direction when a vehicle starts on a ramp. The vehicle movement direction control mechanism comprises a differential housing, two transmission housings, two electromagnetic valves and two one-way clutches, the transmission housings, the electromagnetic valves and the one-way clutches are respectively and symmetrically disposed on the left side and the right side of the differential housing, a valve seat and a valve core of each electromagnetic valve are both of a sleeve structure, the valve seat of each electromagnetic valve is fixedly assembled with the transmission housing on the same side, the valve core of each electromagnetic valve is fixedly assembled with the one-way clutch on the same side, and the transmission housings are sleeved outside the differential housing. The vehicle movement direction control mechanism has the advantages of simple structure and convenience in operation, vehicle rolling when the vehicle starts on the ramp can be prevented, a reliable parking brake function can be realized, and safety performance of the vehicle is improved.

The invention discloses an electric vehicle starting/parking anti-sliding early warning method. Compared with the prior art, the method comprises the following steps that electronic pedal position information is recognized, motor braking is executed, and if electronic pedal position information exists, a vehicle is safely started; if the electronic pedal position information does not exist, wheelrotation speed information and wheel steering information are obtained, and according to the wheel rotation speed information and the wheel steering information, a motor is controlled by a driving motor controller to output torques reverse in direction so that torque generated by wheels during vehicle sliding can be counteracted; and a driver is warned to control a vehicle electronic pedal throughthe sound warning mode and the light warning mode of a combination instrument. Compared with the prior art, through the electric vehicle starting/parking anti-sliding early warning method, the vehicle sliding phenomenon can be avoided, the vehicle safety is improved, and property losses are decreased. The invention further provides the electric vehicle starting/parking anti-sliding early warningmethod and an electric vehicle starting/parking anti-sliding early warning system. The electric vehicle starting/parking anti-sliding early warning system also has same beneficial effects.

The invention relates to the technical field of elevator control, in particular to an elevator starting control method and system. The method comprises the following steps that the torque of a motor is compensated by a first PI adjuster, whether the movement of an elevator exceeds a preset first threshold value or not is detected after an elevator brake is opened, if yes, the torque of the motor is compensated by a second PI adjuster, and meanwhile, PI adjusting parameters of the first PI adjuster and PI adjusting parameters of the second PI adjuster are increased; otherwise, the current PI adjusting parameters of the first PI adjuster is kept to compensate the torque of the motor until the starting process is ended; and when the second PI adjuster is used for compensating the torque of the motor, whether the elevator vibrates or not is detected, and if yes, the PI adjusting parameters of the first PI adjuster and the PI adjusting parameters of the second PI adjuster are reduced. The elevator control method and system can be used for detecting and adjusting different load conditions in the elevator starting process, a stable state can be rapidly achieved when the elevator is started under any load condition, and the comfort of passengers is improved.

The invention discloses an unmanned electric locomotive. The unmanned electric locomotive comprises a car body, wheels, a parking device, a parking driver and a storage battery, wherein the car body is provided with a bow collector; the wheels are arranged on the car body; the parking device is arranged on the car body for braking the wheels; the parking driver is arranged on the car body and connected with the parking device for driving the parking device to brake or release the wheels; the storage battery is arranged on the bow collector and connected with the parking driver so as to supply power for the parking driver. According to the unmanned electric locomotive disclosed by the invention, since the storage battery is arranged, under the power failure condition of the electric locomotive, for instance, the bow separator is separated from a trolley conductor, the storage battery can supply power for the parking driver, and the parking driver can drive the parking device to brake the wheels, so that the electric locomotive decelerates or stops, the electric locomotive is prevented from sliding in the case of power failure, and the driving safety is improved.

The invention discloses an auxiliary brake triple-safety device for a beam-pumping unit. The auxiliary brake triple-safety device comprises a starting mechanism, an intermediate transfer mechanism, afirst safety mechanism, a second safety mechanism and a third safety mechanism. The starting mechanism comprises a support, a sleeve, a bearing seat, a bearing, a driving shaft, a bolt transmission piece and a manual rotating piece. The first safety mechanism adopts a stop-pin-type structure. The intermediate transfer mechanism comprises a horizontal pull rod, a reversing supporting seat and a vertical pull rod which are connected sequentially. The second safety mechanism comprises a tooth disc, took disk teeth, a brake plate, a brake plate engage switch and a brake plate shaft, wherein the brake plate engage switch and the brake plate shaft are matched with the took disk teeth. The third safety mechanism adopts a locking-bolt-type structure. The auxiliary brake has triple safety, so thatthe car sliding phenomenon is eradicated fundamentally, and it is guaranteed that nothing falls during braking; operation is easy and convenient, any position can be locked and opened; the personal safety of an operator is fully guaranteed; and the process is stationary, and the time and labor are saved.

The invention relates to a chestnut long-term storage device and storage method. The chestnut long-term storage device comprises a water storage tank, wherein a storage box is fixedly arranged at thetop of the water storage tank, sliding assemblies are fixedly arranged on two sides of an inner cavity of the storage box in an equal spacing manner, chestnut storing and supporting plates are fixedlyarranged at the tops of the sliding assemblies, and by arranging hydraulic rods, the hydraulic rods can control anti-skid base plates to ascend and descend; the anti-skid base plates can support thebottom of the storage device and prevent the storage device from slipping; water pumps are arranged, clear water in an inner cavity of the water storage tank can be conveyed to water conveying pipes through the water pumps and is finally atomized and sprayed out from atomizing nozzles, the humidity in a refrigeration house can be conveniently adjusted, and chestnuts can be stored for a long time;and by arranging the sliding assemblies, the chestnut storing and supporting plates can be pulled conveniently, bags of chestnuts stored on the chestnut storing and supporting plates can be taken conveniently, an inner cavity of the storage box can be sterilized and disinfected by arranging ultraviolet sterilization lamps, and the situation that chestnut storage is affected by bacterium breeding can be avoided.

The invention discloses a folding baby carriage, relates to the technical field of baby carriages, and provides the following scheme aiming at problems of large occupied space after folding, easiness in sliding and poor safety in the background technology. The folding baby carriage comprises two front wheel brackets of which outer walls of bottom ends are fixedly connected with universal wheels with brakes; connecting blocks are hinged to top ends of the two front wheel supports correspondingly, push rods are hinged to ends, away from the front wheel supports, of the two connecting blocks correspondingly, handles are welded to outer walls of one ends of the two push rods correspondingly, infrared induction modules are arranged on outer walls of the top ends of the two handles correspondingly, and the outer walls of the two push rods are slidably sleeved with fixing sleeves correspondingly. According to the baby carriage, the baby carriage can be locked immediately when the two hands of a parent leave the handle, a carriage sliding phenomenon is prevented, safety is improved, the posture of a baby can be changed at any time, the baby is prevented from being tired, functionality is improved, the baby carriage can be conveniently folded, the occupied space is small after folding, carrying is convenient, and practicability is improved.

The invention discloses a method for assembling trolleys into a sintering machine, and belongs to the technical field of sintering machine equipment. The method for assembling the trolleys into the sintering machine includes the following steps of 1, arranging a first trolley on a first track; 2, rotating a first star wheel according to a preset direction; 3, after the first trolley rotates for afirst angle around the central axis of the first star wheel, allowing the first trolley enter a second track; 4, repeating the steps of 1, 2 and 3, until a plurality of first trolleys are fully distributed on the second track; 5, allowing N second trolleys be driven by the first star wheel to rotate for the first angle according to the preset direction and then conveyed to the second track; 6, after the first trolleys is fully distributed on the first track, rotating the first star wheel for a second angle in the opposite direction of the preset direction, and conveying the N second trolleys to the first track; 7, taking out the N second trolleys from the first track, and filling vacancies with N first trolleys. According to the method for assembling the trolleys into the sintering machine, the technical effects of avoiding phenomenon of car slipping caused by heavy weight of trolleys, making the maintenance and overhaul process of the sintering machine simpler and saving time are achieved.

The invention discloses an electric vehicle control method. The method comprises the steps of detecting whether a person is on a driving seat or not; detecting inclination angles of the vehicle head and the vehicle tail of the vehicle; detecting the vehicle motor rotating speed and the vehicle moving speed; collecting a current vehicle gear; carrying out data processing to judge whether the personis in the driving seat, whether the inclination angles of the head and the tail are greater than a preset inclination threshold, whether the rotating speed of the vehicle motor matches the vehicle gear and whether the moving speed of the vehicle is greater than a preset speed threshold; and if no one is in the driving seat, the inclination angle of the head or the tail of the vehicle is larger than the inclination threshold value, the rotating speed of the vehicle motor does not match the vehicle gear, or the moving speed of the vehicle is larger than the speed threshold, starting a brake device of the vehicle till the moving speed of the vehicle keeps the preset speed threshold, and triggering and broadcasting alarm information. The method has the beneficial effects that vehicle slidingis avoided, or further development of vehicle sliding is prevented, and the vehicle sliding danger is reduced.

The invention aims to solve the problem of braking failure caused by long-distance downhill or a braking system fault of the conventional explosion-proof rubber-tired vehicle under a coal mine well, and provides an auxiliary braking device for an explosion-proof rubber-tired vehicle. The auxiliary braking device for the explosion-proof rubber-tired vehicle comprises an execution mechanism, a control system and a performance warning system, wherein the execution mechanism comprises an explosion-suppression water-cooled casing connected with an explosion-proof diesel engine exhaust system, a valve core provided with a controllable throttle plate, a self-lubricating positioning sleeve and a valve core control mechanism. When the rubber-tired vehicle needs auxiliary braking, the control system can be operated manually to control the execution mechanism to convert a rubber-tired vehicle explosion-proof diesel engine into an auxiliary braking source, the explosion-proof diesel engine can be closed if necessary, so that the braking capacity is increased, the safety braking of the vehicle is guaranteed, and normal operation of the explosion-proof diesel engine is guaranteed through matching with a monitoring device of the performance warning system.