296results about How to "Guaranteed braking effect" patented technology

The present invention discloses combined brake controlling system and method for electromobile. The system includes combined brake ECU, braking pedal displacement sensor, proportional valve, master cylinder oil pressure sensor and wheel cylinder oil pressure sensor. The brake signals the brake pedal displacement sensor and the master cylinder oil pressure sensor acquire are fed to the combined brake ECU, and the combined brake ECU synthesizes and judges to obtain total brake requirement, acquires the available maximum electrically brake moment from the motor ECU to obtain the required hydraulic brake and outputs control signal to the proportional valve for outputting the hydraulic brake force, so as to realize the combined braking of electric braking and hydraulic braking. The present invention has the brake effect and feeling the same as that of traditional process, maximum energy recovery, high operation performance, high brake effect and high energy utilization efficiency.

The invention relates to a method for improving lateral stability under the condition of turning/braking vehicles, in particular to an automobile brake control method for improving lateral stability of turning/braking vehicles. By an off-line simulation method, from the angle of whole-vehicle dynamics, based on optimization technology, the invention calibrates an optimal target slip-rate working interval of an automobile ABS system comprehensively considering both longitudinal braking performance and lateral braking performance under the turning/braking condition, forms a curved surface from target slip rate to steering angle to initial braking speed, and then supplies the target slip rate for dynamically adjusting wheels inside and outside a bend to an online ABS system. The online ABS system adjusts the pressure of a braking wheel cylinder to reasonably allocate longitudinal force and lateral force that every wheel bears when a vehicle turns/brakes so as to improve the lateral stability of the vehicle. On the basis of the prior ABS system, the method has the advantage of allowing the ABS system to have part of the functions of an ESP system without increasing any cost.

The invention relates to the technical field of electric vehicles, specifically to a braking energy recovery control method and device of a rear wheel drive pure electric vehicle. The braking energy recovery control method of the rear wheel drive pure electric vehicle comprises the steps of a braking energy recovery mode judging step, a maximum regenerative braking force calculating step, a demandbraking force calculating step, a braking force distributing step and an anti-lock judging step; in the automobile braking process, distribution of a mechanical braking force and a regenerative braking force is controlled; on the basis of guaranteeing braking safety and braking efficiency, a regenerative braking force distribution coefficient is furthest increased; wasted energy in the braking process is sufficiently recovered by using the feeding capacity of a motor to charge a power battery; the braking energy recovery efficiency is enhanced; the braking energy loss is reduced; and the running range of the vehicle is optimized.

The invention discloses a brake control method for an electric vehicle use and a controlling device thereof, and belongs to the technical field of electric vehicles. The controlling device comprises wheels, wheel brakes, an electric-hydro complex brake ECU, a brake pedal, a brake pedal position sensor, a hydraulic control module, a hydraulic braking system, a motor, a battery, a vehicle speed sensor, a motor control module, an ABS control module, and wheel speed sensors. The method comprises the following steps: determining the braking purpose of a driver according to the driving state, the braking strength, and the state of the motor and the battery of the electric vehicle, determining and choosing a braking mode according to the braking purpose, the battery SOC value, and the state of the ABS, and conducting coordination control for the motor regenerative braking and the hydraulic braking to allow the electric vehicle to provide an excellent braking experience for the driver on the basis of guaranteeing the braking safety. Therefore, under the premise that the braking efficiency can be guaranteed, braking energies are recycled by utilizing the regenerative braking of the motor, and the energy utilization efficiency is improved.

The invention relates to a reinforced vehicles ABS system for improving the turning-breaking lateral stability, which belongs to the braking locking-prevention system for improving the turning-braking lateral stability of vehicles; basing on the angle of automobile dynamics, with the consideration of the driving intentions of drivers, the system aims at improving the lateral stability of the vehicles under braking-turning working condition. By a vehicle linear two freedom degree model, the system estimates the driving intentions of drivers, and with the consideration of the deviations between the actual motion states of the vehicles and the expected motion states of the drivers under the working condition of turning-braking, the system judges the tendency of overturning or deficient turning of the vehicles and changes dynamically the ABS sliding rate work intervals between lateral wheels and medial wheels under the condition that the braking efficiency of vehicles is ensured, therefore the produced difference of braking force can lead the vehicles to a stable status rapidly, thus avoiding the dangerous working conditions of whipping and sideslip, and the like, and greatly improving the lateral stability of the vehicles under the working condition of turning-braking.

The invention discloses a radial extrusion type magnetorheological fluid brake, and belongs to the field of hydraulic resistance brakes. On the basis of an existing device, a right guiding magnetic brake outer shell, a pressurization device, a coil fixing ring, pressurization channels, a right magnet exciting coil and a separation magnet ring are added to the brake, wherein the right guiding magnetic brake outer shell is arranged on the right of a left guiding magnetic brake outer shell, a gap is reserved between the right guiding magnetic brake outer shell and the left guiding magnetic brake outer shell, and the pressurization device is arranged on the outer circumference of the right guiding magnetic brake outer shell; a magnetorheological fluid gap is formed between a driving shaft and the right guiding magnetic brake outer shell, the other magnetorheological fluid gap is formed between the driving shaft and the left guiding magnetic brake outer shell, and a left magnet exciting coil, the right magnet exciting coil and the separation magnet ring are arranged in the gap formed between the right guiding magnetic brake outer shell and the left guiding magnetic brake outer shell; and the left magnet exciting coil and the right magnet exciting coil are fixed through the coil fixing ring, the pressurization channels are respectively arranged on the right guiding magnetic brake outer shell, the coil fixing ring and the separation magnet ring. The radial extrusion type magnetorheological fluid brake is simple in assembling and compact in structure, provides large braking torque, meanwhile enhances device reliability, and reduces energy consumption.

The invention relates to a motor train unit brake lining wear loss estimation method based on on-line monitoring. The estimation method comprises the following steps of 1) monitoring the operation state of a motor train unit and the working state of a subsystem and transmitting collected train operation date to a ground receiving system; 2) storing the operation data and screening out speed, BC pressure, AC pressure and brake time duration during train operation from the received data through the ground receiving system; 3) according to the screened data, determining the equivalent friction distance of the pressure exerted on a brake lining and a brake disc at an nth time; 4) according to the equivalent friction distance and the BC pressure, determining the total wear loss of the brake lining at the nth time. The motor train unit brake lining wear loss estimation method based on on-line monitoring can help estimate the wear loss of every train brake lining relatively accurately according to the brake condition of every train and can prolong the service life of the brake lining under the premise of guaranteeing the brake performance of the brake lining, thereby avoiding waste and reducing the maintaining cost.

The invention provides a hydrogen fuel-cell vehicle braking energy recovery system. The hydrogen fuel-cell vehicle braking energy recovery system comprises a vehicle control unit VCU, a motor controlunit MCU, a hydrogen fuel-cell sub system FCU, a battery management sub system BMS and a super-capacitor+bi-directional DC sub system SCMS; the VCU collects a motor rotation speed and speed reducer speed ratio information to obtain vehicle speed information, collects a throttle opening signal as an energy recovery triggering switch signal and collects an opening of a brake pedal as a judging basisof recovery power; and then, through the BMS, SOC and maximum rechargeable power of a power battery are obtained; through the SCMS, a capacitance, electric quantity and maximum rechargeable power ofa super-capacitor are obtained; and through the MCU, the motor rotation speed and a motor maximum feedback torque are obtained; and through an FCU, the working state of a fuel cell is obtained; and therefore, braking energy recovery is carried out.

The invention provides an electric brake boosting device, and relates to an automobile running brake system. In the device, the force of a brake pedal is transmitted to a piston of a brake main cylinder through a pedal push rod, a push rod spring and a boosting screw rod, the brake pedal is provided with a brake pedal position sensor to sense the operating intension of a driver, an electronic control unit determines the quick degree of providing boost on the basis, calculates the boosting travel according to the preset compression of the push rod spring between the pedal push rod and the boosting screw rod, and controls a step motor to drive a boosting gear through a reducing gear, so that a thread mechanism drives the boosting screw rod to linearly move to realize boosting brake. When the brake pedal stops, the motor does not rotate, and the device maintains the braking force by means of the self-locking function of threads. When the brake pedal is released, the motor rotates reversely, and the boosting screw rod returns to the original position under the action of the reducing gear and the thread mechanism. The foot feel during brake is ensured by keeping the compression of the push rod spring, the boosting effect is obvious, and the structure is simple.

The invention provides a fuel cell braking energy recovery system of a hydrogen energy automobile. The system comprises a vehicle control unit (VCU), a motor control unit (MCU), a super capacitor+bidirectional DC component (SCMS) and a hydrogen fuel cell system (FCU); the SCMS is used for detecting the residual electric quantity (SOC, state of charge) of a super capacitor and the chargeable powerof the super capacitor; the FCU is used for controlling the output power of a fuel cell and controlling the fuel cell to charge power for the super capacitor; the MCU is used for obtaining the rotating speed of a motor and the maximum feedback torque of the motor and controlling the torque of the motor; and the VCU obtains an opening signal of an accelerator pedal as a trigger switch signal for energy recovery, obtains an opening signal of a brake pedal as a judgment basis for the energy recovery power, and obtains the SOC and rechargeable power of the SCMS, the motor rotating speed of the MCU, the maximum feedback torque of the motor and the working state of the fuel cell to recover the brake energy. The fuel cell braking energy recovery system has the beneficial effects that the energy utilization rate of the hydrogen energy fuel cell automobile is improved.

The invention relates to a detecting tooling for vacuum and high-pressure leakproofness of a brake caliper. The detecting tooling comprises a working table, wherein the working table is a mounting platform; two linear shafts I and two linear shafts II are perpendicularly arranged on the working table; the upper ends and the lower ends of the two linear shafts I are sleeved with shaft supports; the upper ends of the two linear shafts I are connected with a vacuum detecting device through bolts VI; a high-pressure detecting device is mounted on the working table, and is positioned under the vacuum detecting device. The detecting tooling can eliminate the leakage phenomenon of the brake caliper, and guarantees the braking performance of a disc brake; meanwhile, by adopting the differential pressure method to detect the vacuum leakproofness of the brake caliper, collecting and processing of signals can be easily realized, particularly automation of the whole detecting process can be realized, the detecting period is greatly shortened, the labor intensity is reduced, and the detecting efficiency of vacuum and high-pressure leakproofness of the brake caliper can be greatly improved meanwhile.

The invention discloses a fuel cell hybrid power tramcar united braking system and method. The system comprises a fuel cell power supply circuit, a lithium ion battery power supply circuit, a super-capacitor power supply circuit, a traction inverter, a traction motor, a mechanical braking device, a control system, a direct current bus and a braking resistor. Optimal braking and braking energy recycling maximization are achieved when it is guaranteed that fuel cell hybrid power reliably supplies power to a tramcar load; and on the premise that the braking performance of the system is guaranteed, optimal braking uniting regenerative braking, energy consumption braking and mechanical braking is achieved, braking energy is recycled as much as possible, the fuel use rate is increased, the purpose of fuel economical efficiency is achieved, the service life of an energy storage device is prolonged, and cost is reduced.

The invention discloses a service braking control system of a four-axle chassis. The service braking control system is characterized in that a brake valve is communicated with a control port of a first relay valve of a first brake circuit, brake chambers are used for controlling a second axle, the brake chambers arranged on the left and right sides of a first axle are respectively controlled and communicated by a second relay valve and a third relay valve, and a control port of the second relay valve and a control port of the third relay valve are respectively communicated with an air outlet of an anti-lock magnetic valve of the second axle; a braking valve is communicated with a control port of a fourth relay valve of a second brake circuit, brake chambers are used for controlling a fourth axle, and the brake chambers arranged on the left and right sides of a third axle are respectively controlled and communicated by a fifth relay valve and a sixth relay valve; a control port of the fifth relay valve and a control port of the sixth relay valve are respectively communicated with the air outlet of an anti-lock magnetic valve of a fourth axle, and an abnormal anti-lock phenomenon of the second axle and the fourth axle is fully avoided through system optimization configuration. The invention also provides a crane with the service braking system.

The invention relates to a winch, in particular to a double-winding-drum transmission device of a motor-driven winch. The transmission device comprises a reduction gearbox and a double-winding-drum wire reel. The reduction gearbox comprises a shell; a gear shifting shaft, a first input shaft, an intermediate transmission shaft, an output shaft and a brake shaft are installed in the shell through first bearings, the gear shifting shaft, the first input shaft, the intermediate transmission shaft and the output shaft are parallel with one another, and the brake shaft is fixed in the shell; a speed changing power output triple gear and a reversing dual gear are installed on the first input shaft, and a speed changing sliding triple gear and a reversing sliding dual gear are connected to the gear shifting shaft through splines; a reversing idle gear is installed between the reversing dual gear and the reversing sliding dual gear through a rotating shaft. According to the transmission device, the reversing sliding dual gear is adopted, and the transmission ratio of the reversing sliding dual gear to a gear on the left side of the reversing dual gear is equal to that of the reversing sliding dual gear to a gear on the right side of the reversing dual gear to the idle gear, so that the speed of a forward gear of the winch is equal to that of a reverse gear of the winch, and operation is facilitated for operators.

The invention discloses a cable tensioning device for high-altitude power construction. The cable tensioning device comprises a base, a plurality of fixed main bodies arranged at the lower part of thebase, a cable tightening rod arranged at the upper part of the base, and a movable clamp hinged to one end of a fixed rod; two sets of supporting frames are arranged on the upper portion of the base,the two ends of the cable tightening rod are movably installed on the supporting frames through bearings, and a rocker or a motor is arranged at one end of the cable tightening rod. One side of the cable tightening rod is provided with a fixed clamping plate fixedly installed on the upper portion of the base. A pull rod is arranged on the upper portion of the fixed clamping plate, a pull ring isarranged at one end of the pull rod, first movable rods are arranged on two sides of the pull rod and the fixed clamping plate, second movable rods are arranged on one sides of the first movable rods,and a movable clamping plate is arranged on the lower portion of the pull rod and fixedly mounted on one sides of the first movable rods and the second movable rods. The cable tensioning device is fixed to an electric pole or an aerial ladder through the fixed main bodies, the motor is started or the rocker is rotated to conduct tensioning operation on a cable, the operation intensity of an electrician is reduced, and the construction safety of the electrician is protected.

The invention relates to mechanical arm joints, in particular to a modularized ball joint of a collaborative robot. The modularized ball joint of the collaborative robot comprises a shell and ball joint driving modules. A module supporting piece is fixedly installed on the shell, and a spherical shell cover is further installed on the shell. A first installation position and a second installation position are arranged on the module supporting piece, and the ball joint driving modules are fixedly installed on the first installation position and the second installation position and installed inside the shell in a sealing mode through the spherical shell cover. The modularized ball joint of the collaborative robot has the advantages that in the aspect of driving, hollow motors are used for driving, deceleration is conducted through harmonic speed reducers, and therefore high-torque transmission is achieved, the transmission accuracy is guaranteed, and the structure is compact and light; and in the aspect of braking, synchronous belt pulleys are utilized to conduct transmission, and therefore the driving portion and the braking portion are isolated, the space is saved, the braking performance is guaranteed, and the installation difficulty of the interior of the joint is reduced.

The invention relates to a distributed type electronic hydraulic brake system using isolating valves and belongs to the field of active safety of automobiles. The distributed type electronic hydraulic brake system comprises four brake actuating mechanisms, four brakes, two isolating valves, four actuating mechanism controllers, a brake pedal, one pedal sensor, a line control brake controller, a bus and a brake pipeline. Each brake actuating mechanism is composed of a motor and a hydraulic cylinder. Each hydraulic cylinder is provided with two oil outlets, one of the two oil outlets is connected with the brakes, and the other oil outlet is connected with the isolating valves. One of the two isolating valves is used for being connected with the brake actuating mechanisms of two front wheels, and the other isolating valve is used for being connected with the brake actuating mechanisms of two rear wheels. The distributed type electronic hydraulic brake system using the isolating valves can improve reliability.

The invention provides a high-carbon and environment-friendly friction material for automobiles and a preparation method of the high-carbon and environment-friendly friction material, belongs to the field of friction composite material preparation, and relates to a friction material. Composition of steel cotton fiber and zinc powder is used for replacing copper to achieve functions of copper in the original formula, and is synergistic with modified resin, aramid fiber, synthetic graphite, mica and other raw materials, and stability of the friction material is improved, and environment pollution due to heavy metal copper entering the environment along with friction dust is prevented. Defects of replacement of copper with zinc are complemented by addition of the steel cotton fiber, the composition of the steel cotton fiber and the zinc powder plays a role similar to that of copper in the material, and accordingly, by addition of the steel cotton fiber, performance of the high-carbon material is more superior, and braking performance is more stable.

A high-speed train wheel brake disc with a sliding block structure comprises two disc bodies and a wheel and further comprises sliding blocks and sleeves. Disc body through holes are evenly distributed along the circumference of the disc bodies. Sliding grooves are formed along the disc faces of the disc bodies and do not penetrate the double side disc faces. The disc body through holes comprise disc body bolt holes and sliding grooves, all of which are arranged at intervals. Wheel through holes are evenly distributed along the circumference of the wheel. The wheel through holes comprise sleeve holes and wheel bolt holes, all of which are arranged at intervals. The number of the wheel through holes is the same as the number of the disc body through holes and is smaller than 18. The sliding blocks can be inserted in the sliding grooves, and the sliding blocks are in clearance fit with the sliding grooves. The sleeves can be inserted in sliding block holes, and the sleeves are in clearance fit with the sleeve holes. A positioning pin mechanism in an original wheel brake disc is replaced with the structure of the sliding blocks and the sleeves, the number of the through holes required to be machined in the wheel and a wheel disc is reduced, the risk of the fatigue crack at the wheel through holes can be reduced, and the service life of the wheel is prolonged.

The invention discloses a rocket mobile launching vehicle, which comprises a tractor, a chassis, a heat preservation cabin, an erecting system, a launching pad, temperature adjusting systems, a hydraulic system, a vehicle control system and power system wherein a traction seat is mounted on the tractor; the traction seat is connected with the chassis through a traction pin; the heat preservation cabin is fixedly mounted on the chassis; the erecting system is hinged to the rear end of the chassis; the launching pad is hinged to the rear end of the chassis; the launching pad and the erecting system are coaxial; the temperature adjusting systems are installed in front of and inside the heat preservation cabin; the hydraulic system is installed below the chassis; the vehicle control system isinstalled inside the heat preservation cabin; the operation panel is located outside the side wall of the heat preservation cabin; and the power systems are installed in the front of the chassis and inside the heat preservation cabin. The rocket mobile launching vehicle is ingenious in conception and reasonable in structural layout, the long-distance transportation time is greatly shortened, the stability in the transportation process is guaranteed, the shock absorption capacity is improved, the heat preservation cabin has good sealing performance, and meanwhile, the requirements for erectingand launching are met through the full-open design.

The invention discloses a wet type braking drive axle. An axle housing, an input assembly, a first brake assembly, a first half shaft, a first hub assembly, a second half shaft, a second brake assembly and a second hub assembly are included. The second brake assembly and the first brake assembly are the same in structure. The input assembly is arranged on the axle housing. The first brake assemblyis located at the left end of the axle housing. The right section of the first half shaft is connected with the input assembly. The first half shaft penetrates through the first brake assembly. The second brake assembly is located at the right end of the axle housing. The left section of the second half shaft is connected with the input assembly. The second half shaft penetrates through the second brake assembly. The first brake assembly and the second brake assembly can compensate for abrasion of a friction plate, and the service life of the friction plate is prolonged. The input assembly isprovided with a buffering mechanism, influences caused on a speed changer from drive axle vibration can be effectively reduced, and the service life of the drive axle is prolonged.

The invention relates to a piston assembling fixture for braking calipers. The piston assembling fixture comprises a working table, wherein four linear shafts are arranged on the working table; the upper ends of the four linear shafts are respectively connected with a top plate; a first sliding plate and a second sliding plate are arranged on the two linear shafts positioned on the front side in sequence from top to bottom; an electric cylinder is mounted on the top plate; the lower end of the electric cylinder is fixedly connected with the upper end of the first sliding plate through a pressure sensor, a floating joint I and a transitioning piece in sequence; a floating joint II and a cylinder I are arranged between the first sliding plate and the second sliding plate; a camera fixing bracket is mounted on the rear side of the working table; a camera is fixed on the camera fixing bracket; a piston assembling machine is arranged between the two linear shafts positioned on the front side; a check ring assembling machine is mounted on the lower end face of the first sliding plate. The piston assembling fixture can guarantee the braking performance of a disk brake; furthermore, the working efficiency and the consistency of products are greatly improved, and the labor intensity of a worker is alleviated.