43results about How to "Reduce the probability of slippage" patented technology

An electric motor is coupled to driving wheels 2, 2. When a slippage of the driving wheels 2, 2 is detected, the electric motor 5 produces a regenerative torque to suppress the slippage of the driving wheels 2, 2. The regenerative torque is controlled in a variable manner according to an index parameter that indicates a road surface condition. Thus, when the slippage of the driving wheels occurs, the slippage of the driving wheels is suppressed according to the road surface condition by a regenerative operation of the electric motor coupled to the driving wheels.

A hybrid vehicle includes an engine 2 , a motor generator 4 , a torque converter 6 with a lock-up clutch 5 and a ratio change mechanism 7 . The control system of the hybrid vehicle includes a rotational sensor 22 that detects the slip ratio of the torque converter and a hydraulic control valve 12 that controls engagement of the lockup clutch. When the vehicle moves as the accelerator pedal is released from the step-down state, driving force from the wheels is transmitted to the motor generator 4 to recover energy. The lockup clutch engagement is only controlled if the slip ratio of the torque converter is equal to or less than the first threshold. However, if the slip ratio is between the first threshold and the second threshold, the motor-generator is additionally cooperatively controlled.

The invention discloses an electronic limited-slip differential and a control method thereof. A detection mechanism is used for collecting rotation speed information, accelerator pedal opening information, steering wheel corner information, lateral acceleration information and yaw velocity information and sending all the information to an electronic control unit; a work mode selection unit is used for selecting different work modes of the electronic limited-slip differential by a driver; and an electronic control unit is used for controlling an electromagnetic clutch, an auxiliary motor and a brake of an execution mechanism to work according to the received information and limiting the slip rates of driving wheels, thereby realizing electronic limited-slip differential velocity of the driving wheels on two sides. When the slip rate of the driving wheel on one side exceeds a set value, the auxiliary motor connected with a half-shaft of the drive axle works as a generator to apply a resistance moment to the half-shaft, so that the slip rate of the wheel is reduced, and a driving moment of the generator effectively acts on the wheel on the other side; and the brake is matched with the auxiliary motor to work in necessity, so as to apply a certain bake force to the wheels.

The invention discloses a seeder with automatic-controllable seeding quantity, which includes: a machine frame, a three-point suspension apparatus, a seed discharge system, a press wheel, two depth limiting wheels, and a seeding quantity control system. The machine frame includes a left side plate and a right side plate, and a first support beam, a second support beam and a third support beam, which are fixedly connected between the left side plate and the right side plate. The lower suspension point and the upper suspension point of the three-point suspension apparatus are respectively fixedon the first support beam and the second support beam. The seed discharge system includes a plurality of seed discharge units, which are installed on the second support beam in parallel. According tothe invention, rotation speed signals of the two depth limiting wheels are collected; and by means of the seeding quantity control system, the signal with maximum rotation speed serves as a control signal so as to regulate and control the rotation speed and length of an outer groove roller seeding unit. The seeder can enlarge the adjustment range of seeding quantity and is increased in control precision, and reduces the influence on seeding uniformity due to slipping of ground wheels.

The invention belongs to the technical field of agricultural machinery, and relates to a pneumatic type precise corn no-tillage planter. The pneumatic type precise corn no-tillage planter comprises a fan (1), a fan rack (2), a fertilizer box (3), a three-point hanging mechanism (4), an active anti-blocking mechanism (7), a general stander (8), a parallel four-connection-rod seeding mechanism (9), an air pressure distribution pipe (5) and a depth control mechanism (6), wherein the four-connection-rod seeding mechanism (9) further comprises a tension spring adjustment ring (29), a stop piece (37) and a lower parallel four-connection-rod limiting mechanism (38); and the depth control mechanism (6) comprises a depth control mechanism mounting plate (46), a depth control mechanism rotating shaft (47), a spring fixing pin (48), an adjustment spring (49), a depth control mechanism adjustment handle (50), a limiting plate (51), a depth control wheel (52), a first depth control mechanism bevel gear transmission box (17) and a second depth control mechanism bevel gear transmission box (56). The planter integrates the active anti-blocking mechanism, a pneumatic type planter and seeding profiling.

The invention belongs to the technical field of rare earth mine exploitation auxiliary equipment, and in particular, relates to a rare earth mine in-situ mine dipping auxiliary leakage device and an application method thereof. The device comprises a liquid inlet hopper, and a liquid inlet pipe connected with the liquid inlet hopper, wherein the diameter of the liquid inlet pipe is 15-35 mm; the length of the liquid inlet pipe is 1350-1400 mm; small holes are formed in the liquid inlet pipe; the number of the small holes is 3-15; and the diameters of the small holes are 5 mm. The rare earth mine in-situ mine dipping auxiliary leakage device and the application method thereof, provided by the invention, are not limited by the production scale, simple and applicable in structure, easy to operate, low in cost, environment-friendly in production and free of pollution, guarantee no collapse of a liquid injection shallow well, and reduce the slippage probability of a humus layer, a clay layer and a weathering mine layer on the earth surface.

The invention discloses a no-auxiliary cotton fiber finishing agent which comprises blocked waterborne polyurethane emulsion, wherein the raw materials of a prepolymer include IPDI, PPG, BDO and DMPA; the molar ratio of the IPDI, PPG, DMPA to BDO is 1.3:(1-1.4):1; the BDO accounts for 2-3% of the total mass of the prepolymer; and the DMPA accounts for 5-6% of the total mass of the prepolymer. In the preparation method, after the prepolymer reaction, EMAO is added for blocking, and triethylamine neutralization salifying and water adding emulsification are performed to obtain light blue blocked waterborne polyurethane emulsion which serves as a cotton fabric finishing agent. When in use, the cotton fabric finishing agent can react with cellulose through heating deblocking to realize the function of a finishing agent. Without adding an auxiliary into a cotton fabric finishing agent prepared by the method, the preparation flow is shortened, the efficiency is improved, the cost is reduced, and the no-auxiliary cotton fiber finishing agent is a novel cotton fabric finishing agent.

The embodiment of the invention provides an anti-lock control method and system of a vehicle and an electric vehicle, and belongs to the technical field of vehicle automatic control. The method specifically comprises the steps of collecting state information of a vehicle; determining the current slip rate of the electric driving wheel of the vehicle according to the state information and a slip rate model; under the condition that the current slip rate is larger than or equal to a preset slip rate threshold value, determining the target wheel speed of the motor driving wheel according to the state information and a slip rate model; and regulating the wheel speed of the motor driving wheel to the target wheel speed, so that the slip rate of the motor driving wheel is reduced to be smaller than a preset slip rate threshold value. According to the scheme, the wheel speed of the motor driving wheel is adjusted to the target wheel speed, the slip rate of the motor driving wheel can be reduced to be smaller than the preset slip rate threshold value; therefore, it is ensured that the slip rate in the braking process is within the safety range, and the braking anti-lock safety is provided.

A control device may be configured for responding to failure for ensuring the stability of a vehicle by switching from a two-wheel-drive mode to a four-wheel-drive mode when detecting failure of the brake system in a two-wheel-drive mode.

The invention discloses a large-overlap-ratio inner engaged gear tooth form design method based on an arc line of action. The line of action designed through the method is an arc connecting an intersection of addendum circles of an inner gear and an outer gear and an intersection of nodal circles, and on the basis of a plane engagement theory, a conjugation equation expressing the corresponding relation between the line of action and an inner engaged gear conjugate profile curve is established; conjugate profile curves according with the arc line of action are established, wherein the conjugate profile curves are the inner gear addendum profile curve and the outer gear addendum profile curve; the conjugation principle is used for establishing dedendum profiles conjugated with the addendum profile curves and the inner gear dedendum profile is shaped; and transition curves between the gear dedendum profiles and dedendum circles are designed. The method has the beneficial effects that the overlap ratio is high, compared with an involute tooth form, the overlap ratio is increased more than twice, multiple gear teeth are involved in engagement, bearing capacity is high, dynamic impact is small, the relative sliding ratio is low, and the lubricating condition is good; and the profile interference problem is avoided and gear parameters are designed more freely.

The invention provides an electro-hydraulic braking system and a method for preventing wheels of a vehicle from slipping by using the electro-hydraulic braking system. An electro-hydraulic brake system includes a master cylinder in fluid communication with a reservoir tank containing brake fluid. The master cylinder defines a bore and primary and secondary openings. The protrusion extends outwardly from a rear surface of the master cylinder. A pressure supply unit is coupled to a front surface of the master cylinder and is in fluid communication with a reservoir tank to supply brake fluid therefrom. A master cylinder electronic control unit is coupled to the rear surface and in abutting relationship with the protrusion. At least one isolation valve is disposed on the rear surface, spaced apart from the protrusion, and received by the master cylinder electronic control unit to adjust a brake fluid flow from the master cylinder to the wheel brake.

The invention relates to a lathe with high machining precision, and relates to the technical field of flange machining. The lathe comprises a rack, wherein a main shaft and a turning mechanism used for cutting a flange blank are arranged on the rack, a three-jaw chuck is arranged on the main shaft, a positioning assembly is arranged on a chuck body of the three-jaw chuck, the positioning assembly comprises a plurality of sliding blocks and tip cones with the same number as the sliding blocks, the sliding blocks are in sliding connection with the chuck body in the radial direction of the chuck body, the sliding blocks can be meshed with a spiral disc, and the tip cones are arranged on the sliding blocks; and a switching mechanism is further arranged on the chuck body, the switching mechanism is used for controlling the sliding blocks and clamping jaws on the three-jaw chuck, so that the sliding blocks are meshed with the spiral disc or the clamping jaws are meshed with the spiral disc. According to the lathe, when an operator rotates the spiral disc, the sliding blocks can synchronously slide, so that the tip cones can be distributed on the three-jaw chuck more uniformly, and then the stability of the tip cones when the tip cones support the flange blank is improved.

The invention discloses a four-wheel antiskid system for an undergraduate formula racing car. The four-wheel antiskid system comprises an electronic control unit including a data recorder, four Hall wheel speed sensors used for collecting the rotate speed of four wheels of the racing car in real time and a throttle position sensor used for collecting the throttle position in real time; the output ends of the four Hall wheel speed sensors and the throttle position sensor are connected to the electronic control unit, and the output end of the electronic control unit is connected to an oil injection mechanism and an ignition mechanism of an engine of the racing car. When the electronic control unit detects that the slip rate of the racing car is too large, the ignition mechanism and the oil injection mechanism of the engine can be directly controlled to reduce the output torque of the engine, so that the slip rate when the racing car drives is reduced; an engine operating mechanism is used directly for solving the antiskid problem, the whole system is simpler and more convenient to use, and the system is stale and reliable.

The invention provides a limiting device for a latex mattress. The limiting device comprises a hook-and-loop fastener rough surface belt, a cloth strip, a hook-and-loop fastener hook surface belt, a plastic plate and a sponge double-sided adhesive tape, the hook-and-loop fastener rough surface belt is fixed on the front end surface of a latex mattress body; the cloth strip is fixed to the upper end of the hook-and-loop fastener rough surface belt. The hook-and-loop fastener hook face belt is installed on the front end face of the hook-and-loop fastener rough surface belt, and the front end face of the hook-and-loop fastener hook face belt is fixed to the upper side of the rear end face of the plastic plate. The plastic plate is arranged in front of the latex mattress body, the front end face of the sponge double-sided adhesive tape is fixed to the lower side of the rear end face of the plastic plate, the rear end face of the sponge double-sided adhesive tape is pasted to the upper sideof the front end face of a bed board, the probability of sliding deviation of the latex mattress body is reduced through the design, and the limiting device is good in limiting effect, easy to operate, convenient to separate and attractive.

The invention belongs to the technical field of agricultural equipment, and specifically relates to a steering wheel type no-tillage and precise sterilizing seeder for maize. The steering wheel type no-tillage and precise sterilizing seeder for maize comprises a rack (1), a suspension mechanism (2), a transmission mechanism (3), a straw crushing returning and clearing device (5), a fertilizer applying device, a steering wheel type spoon plate dibbler (6) and a press wheel (7); the suspension mechanism (2) is arranged at the front end of the rack (1); the transmission mechanism (3) and the fertilizer applying device are arranged in the middle part of the rack (1). The steering wheel type no-tillage and precise sterilizing seeder for maize is characterized in that the straw crushing returning and clearing device (5) is arranged below the front end of the rack (1); the steering wheel type spoon plate dibbler (6) is arranged at the lower end of the middle part of the rack (1); the press wheel (7) which is connected through a vibrating arm (10) is arranged at the tail end of the rack (1). According to the steering wheel type no-tillage and precise sterilizing seeder for maize, the straws are crushed, the surface soil is broken, thus the tillage condition is obviously improved, the sliding rate of the dibbler is obviously reduced, and as a result, the seeding uniformity and accuracy can be ensured, and the seeding quality can be improved.

Provided are a hybrid electric vehicle front and rear torque control method and device. The torque control method comprises the steps that according to current vehicle state information and driver input information, the total theoretical torque of a power source in a vehicle to a front speed change mechanism is obtained; a running mode of the current vehicle is detected; when it is detected that the running mode is an AWD running mode, the slippage rate between front wheels and rear wheels of the vehicle is obtained; according to the total theoretical torque and the slippage rate, a rear actual torque of the power source to a rear speed change mechanism is obtained; according to the total theoretical torque and the rear actual torque, a front actual torque of the power source to the frontspeed change mechanism is obtained. According to a torque distribution method, the torques of the front wheels and the rear wheels are adjusted according to the slippage rate, accordingly the slippagerate between front wheels and rear wheels is reduced when the slippage rate is higher, and the running stability is improved. In addition, the torque required by the vehicle can be also more uniformly distributed to the front wheels and the rear wheels, and accordingly the controllability and stability of the vehicle are improved.

The invention discloses a distributed driving electronic differential self-adaptive control system. The system comprises a power supply device, an accelerator pedal, a steering wheel and corner sensor, a vehicle speed estimator, a signal preprocessor, an electronic differential controller, a motor controller, a wheel speed sensor, an accelerator pedal sensor, a brake pedal sensor, a driving motor,an input signal processing module, a whole vehicle driving control module and a driving torque output module; wherein the input signal processing module is connected with the whole vehicle driving control module, and the whole vehicle driving control module is connected with the driving torque output module. The whole vehicle coordination control model and strategy of a double-layer structure with the upper layer as the driving force distribution layer and the lower layer as the slip rate control layer are adopted. According to different driving conditions of an automobile, wheel equal powerdistribution control, a yaw moment control strategy based on fuzzy control and a self-adaptive electronic differential control strategy based on similar wheel slip rates are used for achieving multi-mode coordination control.

The invention relates to an oiling machine and a heat treatment process adopting the oiling machine, and relates to the technical field of bearing machining. The oiling machine comprises two oiling machine bodies, feeding belts are arranged on the oiling machine bodies, and a first conveying belt and a second conveying belt are arranged on the ground in a spaced mode. A turnover device is arranged on the ground between the first conveying belt and the second conveying belt, and is used for turning over a bearing in a collecting box. According to the oiling machine, the collecting box is fed into the first oiling machine body and is sprayed with anti-rust oil, then the collecting box is moved to the turnover device, and the turnover device is started to turn over the bearing in the collecting box by 180 degrees; and then the collecting box is conveyed to the second oiling machine body and is sprayed with the anti-rust oil for the second time, so that the probability that the anti-rust oil is not sprayed to the bearing due to shielding is reduced, the probability of rusting of the bearing is reduced, and the quality of the bearing is improved.

A driving force control system for a vehicle configured to eliminate slippage of a wheel without changing a driving torque or a braking torque abruptly. The driving force control system comprises a drive unit and a controller. The drive unit includes a differential mechanism connected to a right wheel and a left wheel to distribute torque of a torque generating device, and a differential restricting device that restricts a differential rotation between the right wheel and the left wheel. The controller restricts a differential rotation between the right wheel and the left wheel less than a predetermined value by the differential mechanism. If a slip ratio of one of the wheels smaller than that of the other wheels is greater than an acceptable value, the controller executes a slip-eliminating control.

The present invention discloses one kind of antiskid control system for electromobile. The antiskid control system includes wheel speed sensors for detecting the real-time speeds of the wheels, wheel brakes for braking the wheels separately, one motor for driving the electromobile, and one ABS / ASR integrated control unit connected to all the sensors, the brakes and the motor. When the ABS / ASR integrated control unit receives an acceleration signal, the ABS / ASR integrated control unit regulates the real-time output torque of the motor based on the wheel slip rate and controls the wheel slip rate as 0.2; and when the ABS / ASR integrated control unit receives a braking signal, it regulates the real-time braking force based on the wheel slip rate. The present invention can reduce the slip rate of electromobile effectively and raise its running stability.

The invention discloses a connecting part of an assembly type steel-concrete combination structure used for a steel-concrete combined bridge, and relates to the field of bridge construction connectionparts. The connecting part comprises a concrete plate, connecting grooves are formed in the top end of the concrete plate, longitudinal reinforcing ribs are arranged in the connecting grooves, transverse reinforcing ribs are arranged at the positions, on one sides of the longitudinal reinforcing ribs, in the connecting grooves, one end of the concrete plate is connected with a groove, a first connecting steel part is arranged in the groove, and first bolts are arranged in the first connecting steel part. Through the concrete plate, a mounting steel part, a fixed steel part, second thread holes, an anti-sliding pad, through holes, second bolts, a clamping groove and a connecting ring, the concrete plate is connected with the mounting steel part in a manner that the second bolts penetrate through the anti-sliding pad and the fixed steel part, the anti-sliding pad is added between the connected steel parts, and is located in the clamping groove, so that the slippage probability between the connecting parts is reduced, and dismounting and mounting are convenient.

The invention belongs to the technical field of agricultural machinery, and relates to a pneumatic type precise corn no-tillage planter. The pneumatic type precise corn no-tillage planter comprises a fan (1), a fan rack (2), a fertilizer box (3), a three-point hanging mechanism (4), an active anti-blocking mechanism (7), a general stander (8), a parallel four-connection-rod seeding mechanism (9), an air pressure distribution pipe (5) and a depth control mechanism (6), wherein the four-connection-rod seeding mechanism (9) further comprises a tension spring adjustment ring (29), a stop piece (37) and a lower parallel four-connection-rod limiting mechanism (38); and the depth control mechanism (6) comprises a depth control mechanism mounting plate (46), a depth control mechanism rotating shaft (47), a spring fixing pin (48), an adjustment spring (49), a depth control mechanism adjustment handle (50), a limiting plate (51), a depth control wheel (52), a first depth control mechanism bevel gear transmission box (17) and a second depth control mechanism bevel gear transmission box (56). The planter integrates the active anti-blocking mechanism, a pneumatic type planter and seeding profiling.

The invention discloses a large-overlap-ratio inner engaged gear tooth form design method based on an arc line of action. The line of action designed through the method is an arc connecting an intersection of addendum circles of an inner gear and an outer gear and an intersection of nodal circles, and on the basis of a plane engagement theory, a conjugation equation expressing the corresponding relation between the line of action and an inner engaged gear conjugate profile curve is established; conjugate profile curves according with the arc line of action are established, wherein the conjugate profile curves are the inner gear addendum profile curve and the outer gear addendum profile curve; the conjugation principle is used for establishing dedendum profiles conjugated with the addendum profile curves and the inner gear dedendum profile is shaped; and transition curves between the gear dedendum profiles and dedendum circles are designed. The method has the beneficial effects that the overlap ratio is high, compared with an involute tooth form, the overlap ratio is increased more than twice, multiple gear teeth are involved in engagement, bearing capacity is high, dynamic impact is small, the relative sliding ratio is low, and the lubricating condition is good; and the profile interference problem is avoided and gear parameters are designed more freely.

A rail vehicle anti-skid control method, device and rail vehicle system, the vehicle target deceleration a is obtained according to a given braking level; the current deceleration a' of the controlled shaft is obtained according to the shaft speed of the controlled shaft; A deceleration difference Δa is obtained from the target deceleration a and the current deceleration a'; a braking force change command is generated according to the deceleration difference Δa and the pre-calculated slip rate S of the controlled shaft. By adopting the solution in this application, the braking force output is controlled by mutual restriction between the slip rate S of the controlled shaft and the difference between the deceleration of the wheel and the target deceleration, which can maximize the use of the adhesion between the wheel and rail to achieve anti-skid control.

The invention discloses a peanut field breeding precision seeder which comprises a rack, a driving land wheel device and a seeding device, the seeding device comprises a seed pre-filling device, an air suction seed discharging device, an air suction seed cleaning device, a seeding adjusting device and the like, and seeds are controlled by the seed pre-filling device to enter the air suction seed discharging device according to requirements; residual seeds are collected by combining the air-suction seed cleaning device, and the seeding adjusting device can automatically adjust the seeding speed and the distance between a scraper and a seeding port according to the peanut seeding speed, so that the damage rate of peanut seeds is reduced, and the optimal seed filling performance is realized; the overall shape of the driving land wheel device is V-shaped, and the driving land wheel device has a relatively low slip rate, so that the seeding stability of the seeding device of the peanut seeding machine and the accuracy of seeding hole spacing are ensured. According to the scheme, the seed filling efficiency in the peanut sowing process is effectively improved, the damage rate of peanut seeds is reduced, the sowing depth consistency in the sowing process is kept, and high practical application and popularization value is achieved.

The invention discloses a four-wheel anti-skid system for a college student formula racing car, which includes an electronic control unit including a data recorder, four Hall wheel speed sensors for real-time acquisition of the four wheel speeds of the racing car, and a sensor for real-time acquisition of the throttle position. The throttle position sensor, the output ends of the four Hall wheel speed sensors and the throttle position sensor are respectively connected to the electronic control unit, and the output ends of the electronic control unit are respectively connected to the fuel injection mechanism and the ignition mechanism of the racing engine. In the present invention, when the electronic control unit detects that the slip rate of the racing car is relatively large, the output torque of the engine is reduced by directly controlling the ignition mechanism and the fuel injection mechanism of the engine, thereby reducing the slip rate when the racing car is driven, which directly utilizes the engine itself The working mechanism solves the problem of anti-skid, and the whole system is more concise, convenient, stable and reliable.

The invention relates to a shaft expansion forming device which comprises a machine body, wherein a clamping assembly is arranged on the machine body and used for clamping a pipe body, the clamping assembly clamps the end, close to the length direction, of the pipe body, a shaft expansion assembly is arranged at the end, clamping the clamping assembly, of the pipe body and comprises a mounting table, and the mounting table and one end of the pipe body are mounted on the machine body; a shaft expansion air cylinder is mounted on the side, away from the pipe body, of the mounting table, a piston rod of the shaft expansion air cylinder stretches out and draws back in the direction close to or away from the pipe body, a shaft expansion head is mounted on the piston rod of the shaft expansion air cylinder; the clamping assembly comprises a limiting sleeve which is arranged on the outer side of the tube body in a sleeving mode, and a guide sleeve is arranged on the side, facing the tube body, of the mounting table in a sleeving mode. The shaft expansion forming device has the advantages that the tube body can be connected to other parts without welding, so that smoke dust cannot be generated, and pollution to the environment during production of a long tube non-standard part is reduced.

The invention discloses a connecting part of an assembly type steel-concrete combination structure used for a steel-concrete combined bridge, and relates to the field of bridge construction connectionparts. The connecting part comprises a concrete plate, connecting grooves are formed in the top end of the concrete plate, longitudinal reinforcing ribs are arranged in the connecting grooves, transverse reinforcing ribs are arranged at the positions, on one sides of the longitudinal reinforcing ribs, in the connecting grooves, one end of the concrete plate is connected with a groove, a first connecting steel part is arranged in the groove, and first bolts are arranged in the first connecting steel part. Through the concrete plate, a mounting steel part, a fixed steel part, second thread holes, an anti-sliding pad, through holes, second bolts, a clamping groove and a connecting ring, the concrete plate is connected with the mounting steel part in a manner that the second bolts penetrate through the anti-sliding pad and the fixed steel part, the anti-sliding pad is added between the connected steel parts, and is located in the clamping groove, so that the slippage probability between the connecting parts is reduced, and dismounting and mounting are convenient.

The invention provides an automobile plastic mold dust-proof structure which includes round rode, a bolt and a sleeve. The upper end of the sleeve is mounted on the lower end faces of dust-proof covers through rolling bearings, the upper ends of the round rods are embedded in the sleeve, and the bolt is installed on the lower side of the annular side face of the sleeve. By means of the design, theround rods on one set of dust-proof cover are screwed into threaded holes in the other sets of dust-proof cover to achieve the butt joint aim, and the automobile plastic mold dust-proof structure hasthe good dustproof effect, is convenient to plug and good in stability and has a docking structure.