55results about How to "Good braking effect" patented technology

The present invention relates to an elevator two-way overspeed protection equipment. Said invention includes a rope-clamping device formed from frame body, two energy-storing spring mechanisms, brake frame with movable brake plate, fixed brake plate and unhooking mechanism, two-way speed-limiting device and control rope connected between rope-clamping device and two-way speed-limiting device. It is characterized by that between the movable brake plate and fixed brake plate of described brake frame a wedge-shaped brake plate is formed, and can be upwards slided so as to attain the brake effect. Said invention is reliable and good in brake effect and its safety is high.

The invention provides a wearing material, a composite brake pad for braking and a method for preparing the same, wherein the wearing material comprises the following components: acrylonitrile butadiene rubber, phenolic resin, graphite, iron powder, precipitated barium sulfate, potassium feldspar powder, steel fiber, needle-like wollastonite and other auxiliary materials; the composite brake pad made of the wearing materials can meet the service requirements of a speed increased passenger car, and the use of the loaded speed increased passenger car in the whole road shows that the braking effect is good, no thermal damage and abnormal abrasion is caused on a braking disk, slag and blocks do not fall off from the car, and the service life is long.

The invention discloses a dual-hydraulic drum type braking device which comprises a brake disc sleeved with a hub. A left brake shoe and a right brake shoe are symmetrically arranged in the brake disk. The top end of the left brake shoe and the top end of the right brake shoe are connected through an upper telescopic hydraulic cylinder. The bottom end of the left brake shoe and the bottom end of the right brake shoe are connected through a lower telescopic hydraulic cylinder symmetrical to the upper telescopic hydraulic cylinder. The upper end of the left brake shoe and the upper end of the right brake shoe are connected with the two ends of an upper extension spring respectively. The lower end of the left brake shoe and the lower end of the right brake shoe are connected with the two ends of a lower extension spring respectively. By arranging the upper telescopic hydraulic cylinder and the lower telescopic hydraulic cylinder which are symmetrical to each other at the top ends and the bottom ends of the left brake shoe and the right brake shoe, during braking, the upper ends and the lower ends of the left brake shoe and the right brake shoe are moved outwards at the same time, the contact area of the brake shoes and the hub is large, the concentration of friction force in the braking process is reduced, the problem that the brake shoes dissipate heat in an excessive concentrated mode when the friction force is excessively concentrated is solved, and durability of the brake shoes is improved.

The invention discloses a control method of rotation of an excavator working device and belongs to the technical field of engineering machines. According to the method, at least three paths of tilt angle sensors are arranged at the rotation position of the excavator working device, two paths of pressure sensors are arranged on a bucket oil cylinder, and the sensors are connected with an excavator main controller. When an excavator rotates, the displacement travel of an operating handle is input to a control signal of the target rotating speed of the excavator main controller, meanwhile, and signals detected by the sensors are transmitted to the excavator main controller; the excavator main controller calculates the rotating inertia of the excavator according to the control signal of the target rotating speed and real-time information of the sensors, a driving signal for adjusting the torque of a driving motor is output, and stable movement of the excavator working device under different kinds of rotating inertia is controlled. Through the control method of rotation of the excavator working device, the problems that in the working process of the excavator working device, the control effect is poor, and shaking happens can be solved.

The invention discloses a deformation buffer type emergency brake device for an elevator. The deformation buffer type emergency brake device comprises a vertically arranged elevator mounting frame andis characterized in that an emergency brake buffer module is vertically arranged outside the elevator mounting frame in a wrapping manner, the emergency brake buffer module comprises a buffer mounting cylinder vertically arranged outside the elevator mounting frame, a brake mounting plate coordinated with the elevator mounting frame is horizontally arranged at the upper end of the buffer mountingcylinder, a vertical and downward through ventilation hole is formed in the middle of the brake mounting plate, telescoping squeezing brake structures are embedded into the brake mounting plate partson the left side and the right side of the ventilation hole in a left-right symmetry manner, each telescoping squeezing brake structure comprises a guide mounting hole extending out from the interiorof the brake mounting plate, and a guide inner threaded cylinder is horizontally arranged inside each guide mounting hole. The deformation buffer type emergency brake device is reasonable and compactin structural design, high in mounting adaptability, good in brake buffer effect by combining active and passive brake buffer, high in safety and the like.

The invention discloses a novel anti-locking brake device for an automobile. The novel anti-locking brake device for the automobile comprises a braking rotary disc, two main cavity bodies and a T-shaped auxiliary cavity body, the upper ends and the lower ends of the interiors of the main cavity bodies are separately and slidably connected with second pistons and first pistons, the first pistons are connected with the middles of the rear sides of braking discs through first sliding rods, and the second pistons are connected with a cross rod through second sliding rods. The two main cavity bodies are connected through the auxiliary cavity body in a penetrating mode, the second pistons in the main cavity bodies move to drive the first pistons to move for braking, meanwhile, a third piston moves in the auxiliary cavity body under the driving of a motor, braking anti-locking is realized, in addition, the braking rotary disc on the braking discs is fixed through a positioning rod, disassembly and replacement are facilitated, and the braking maintenance efficiency is improved.

The invention discloses a centrally-mounted eddy current retarder. The centrally-mounted eddy current retarder comprises a stator assembly and a rotor assembly, wherein the stator assembly consists of a stator support, a bearing seat is arranged on the stator support which is connected with an iron core, a winding coil is arranged on the iron core, a front magnet yoke and a rear magnet yoke are arranged on the stator support, at two sides of the iron core, the rotor assembly comprises a bearing arranged in the bearing seat, and a shaft arranged in the bearing, and a front rotor disc adjacent to the front magnet yoke, and a rear rotor disc adjacent to the rear magnet yoke are arranged at two ends of the shaft. The centrally-mounted eddy current retarder cuts magnetic lines to produce eddy current through the rotor assembly, thereby forming brake moment, and being good in braking effect; and furthermore, heat produced in flowing of the eddy current inside the rotor assembly can be dissipated out through powerful wind generated by blades on the rotor disc, thereby effectively solving the problem that flat tires easily occur due to high temperature in summer, and being simple in structure and easy to realize.

The invention belongs to the technical field of high-altitude operation and relates to a high-rise descent control device. The high-rise descent control device comprises a paying off tube, wherein a rotating shaft is arranged in the paying off tube in a penetrating way, a retractable rope is wound and arranged on the rotating shaft, one side of the rotating shaft arranged in the paying off tube is provided with a friction braking device used for braking the rotating shaft, one side outside the paying off tube is provided with a crank handle or a hand-operated wheel connected with the rotating shaft, the lower side of the paying off tube is connected with a seat basket, and the other side of the rotating shaft arranged in the paying off tube is provided with a damping speed reducing device. The high-rise descent control device has the advantages that the gravity and the inertia effect of damping particles are utilized, the damping speed reduction braking effect is good, and the high-rise descent control device is suitable for being used for high-altitude operation or high-rise escaping devices.

The invention discloses a heavy front-brake braking caster, which comprises a caster, a caster seat, a braking pedal, a braking connecting rod, a braking arm plate, a braking adjusting nail and a braking pressing plate, wherein the upper part of the caster seat is fixedly connected with the bottom of equipment, and the lower part of the caster seat is fixedly connected with the center shaft of the caster. The heavy front-brake braking caster adopts flash-brake type braking, is flexible to operate and convenient to use, and can carry out flash-brake type braking before the equipment. The braking nail is adjusted so as to ensure the optimum distance between a braking point and the caster surface and keep a good braking effect. The heavy front-brake braking caster has a simple and compact structure, is additionally provided with an anti-shake noise-reducing torsional spring, effectively remits the technical problem that noises can be made due to shake and friction in the walking process of the caster as gaps exist among the braking parts of the traditional braking device, and achieves a mute effect. A bearing sleeve made of special materials is additionally arranged in a bearing ring, so that the noises are reduced and meanwhile 40 percent of load weight is increased, and the service life of the heavy front-brake braking caster is effectively prolonged.

The invention relates to an EBS trailer valve which comprises an air pressure sensor, a proportional electromagnetic valve, a valve body, a first piston and a second piston. A valve and a return spring are installed in the second piston, the first piston and the second piston are connected, and the air pressure sensor and the proportional electromagnetic valve are arranged on the valve body and connected with an ECU. The valve is provided with a first valve port and a second valve port, a third piston is arranged on the valve, a conical spring is disposed outside the third piston, and a fourth piston is arranged on the upper side of the third piston. An iron core is arranged on the inner side of the proportional electromagnetic valve, an upper valve is arranged on the lower side of the iron core, an exhaust port is formed in the lower side of the upper valve, an air inlet valve is arranged below the exhaust port, an ejector rod is arranged below the air inlet valve and connected with a throttling piston, a spring is arranged on the outer side of the throttling piston, and a throttling block is connected to the throttling piston. A cavity connected with the valve body through a pipeline is formed in the valve body. The EBS trailer valve is good in braking effect, low in cost and long in service life.

The invention relates to a bicycle brake, which comprises a base, a first arm assembly and a second arm assembly, wherein the base is fixedly connected with a bicycle frame of a bicycle in a way without relative motion, the first arm assembly is pivoted on the base, and is provided with a first end part, a second end part and a first butting part, the first end part is connected with a braking line, and the second end part clamps and swings towards one braking edge of a wheel rim. The second arm assembly is pivoted at the base relative to the first arm assembly, and is provided with a third end part, a fourth end part and a second abutting part arranged at the third end part, the second butting part is arranged above the first butting part in a way with the interference in the pivoting direction, and the fourth end part clamps and swings towards to the other braking edge of the wheel rim.

The invention relates to the technical field of brake devices, in particular to an unmanned locomotive braking device. The device comprises a device body and a brake pad, a brake cavity is formed in the device body; a horizontal sliding through hole is formed in the upper end of the brake pad; a second ball is rotationally arranged in the sliding through hole. A motor is fixedly mounted on the side edge of the brake cavity in the device body; an output shaft of the motor is coaxially and fixedly connected with a horizontal rotating shaft; and two rotating pieces are coaxially and fixedly connected to the rotating shaft, the rotating pieces are slidably embedded in the sliding through holes, two threaded second ball grooves are symmetrically formed in the side walls of the rotating pieces,the two second ball grooves are both 180 degrees in angle and are connected end to end, and second balls are embedded in the second ball grooves. The brake device has the advantages of simple structure, good brake effect, smooth sliding, good stability and convenience in popularization and implementation.

The invention relates to the field of assembly which is installed on an electric tricycle rear axle. A bearing (49) which is arranged on a shaft matching surface (2) of a driving half shaft (43) in a sleeved mode is installed in a flange bearing groove (14) of a rear axle tube assembly (48) and a switch box bearing groove (28) of a switch box assembly (51), the driving half shaft (43) is connected with a wheel hub (55) through a flat key (44), a wheel hub taper matching surface (4) of the driving half shaft (43) is matched with a driving half shaft taper matching surface (37) of the wheel hub (55), the flange (12) is connected with a switch box (17) through a connecting piece, a hoof block assembly (53) is arranged at the inner side of the wheel hub (55), and the wheel hub is connected with a rim (56). The electric tricycle rear axle assembly has the advantages of being capable of enabling a bearing to be sealed between the flange and the switch box and preventing water and dust from entering, long in service life and easy to replace.

The invention discloses a hub type brake of an electric bicycle, which has long service life. The brake comprises a shell and left and right friction plates movably arranged on the shell, wherein a rear fixed seat is arranged at the rear end of the shell; a rear return spring and a front return spring are arranged between the left and right friction plates; a front fixed seat is arranged at the front end of the shell; an adjusting spline nut is movably arranged in the front fixed seat; spline gears are arranged on the adjusting spline nut; an adjusting screw is arranged in the adjusting spline nut; the right end of the adjusting spline nut pushes against the left end of a sliding adjusting push rod; the sliding adjusting push rod is movably arranged in a square shaft; a gear striking device is arranged at the upper end of the square shaft; a limiting groove matched with the square shaft is arranged in the shell; the lower end of the square shaft is connected with a swing arm; and the swing arm is connected with the shell by a torsion spring.

The embodiment of the invention provides an energy consumption braking device for a tunnel fan. A direct current is injected into a stator winding coil of the tunnel fan through an isolation transformer and a rectification module, a magnetic field with the direction being opposite to the direction of a magnetic field generated due to the fact that the tunnel fan continues to rotate forward becauseof inertia is generated, about half of the braking time can be reduced effectively, the braking process of the tunnel fan is rapidly achieved, the braking effect is significant, and the problems caused by the excessively long braking time can be effectively avoided. By additionally arranging the isolation transformer and the rectification module in the energy consumption braking device, an energyconsumption braking resistor of a traditional energy consumption braking device can be omitted, power consumption and the starting frequency of the tunnel fan are lowered, and energy consumption of the energy consumption braking device is effectively lowered. Meanwhile, the equipment mounting space is optimized, the size of a control cabinet of the tunnel fan can be decreased, consumables are reduced, and cost lowering and energy saving are achieved.

The invention relates to a roller wheel type braking energy-saving wheel device with two circles of coil springs, which consists of a wheel body mechanism, an energy storage mechanism and a control mechanism, wherein the inertial energy of a vehicle and wheels during braking and decelerating is stored, is applied to wheel starting and can improve the braking effect. In the wheel body mechanism, a spoke is separated from a rim, an outer ring is sleeved on the rim, and the rim, the outer ring and a steel ball form two rows of radial bearings; in the energy storage mechanism, the outer end of the spoke is provided with a roller wheel which is arranged on the spoke and is enwound with a coil spring, the inner end of the coil spring is fixedly connected to the roller wheel, the outer end of the coil spring is fixed connected to the rim, and the coil spring rolls and stretches to perform energy storage and energy release; in the control mechanism, a wheel brake is driven to press the rim so as to stop the rotation of the rim, but the outer ring rotates continuously under the action of inertia, a lug boss drives a jack to get away from a shifting block on the spoke, and the spoke and a wheel hub rotate to drive the roller wheel to rotate so that the coil spring stores energy; and the energy release is realized by loosening the wheel brake to ensure that the tensile force and the torque generated by the elastic potential energy accumulated by the coil spring drive the rim to rotate counterclockwise so as to drive the wheels to move forward.

The invention discloses a novel large-inertia rotating-shaft braking system. The novel large-inertia rotating-shaft braking system comprises brake installing supports, brakes and a brake disc. In the brakes, guiding columns are installed on an installing base, the guiding columns are sleeved with base bodies, hydraulic cylinders and lower brake pads are installed on the base bodies respectively, upper brake pads are connected with piston rods of the hydraulic cylinders, and travel sensors are installed on the upper brake pads and used for detecting the thickness of the upper brake pads; the multiple brakes are installed on the multiple brake installing supports through installing bases of the brakes, the upper brake pads and the lower brake pads of all the brakes are located on the two sides of the brake disc respectively, and the multiple brakes are evenly distributed outside the circumference of the brake disc. According to the novel large-inertia rotating-shaft braking system, the multiple brakes are adopted, two brake pads are adopted for each brake, braking force is extremely large, the braking effect is quite remarkable, and the novel large-inertia rotating-shaft braking system is suitable for large-inertia rotating-shaft braking; the thickness of the brake pads is detected through the travel sensors in real time, and safety accidents caused by excessive abrasion failure of the brake pads are avoided.

The invention relates to an electric vehicle brake control device. The electric vehicle brake control device comprises a front wheel brake, a rear wheel brake, a left brake handle and a right brake handle and is characterized in that the rear wheel brake is provided with an electronic auxiliary brake device, the left brake handle is connected to the front wheel brake through a brake line and provided with an electronic auxiliary brake signal switch which is connected to a controller of the electronic auxiliary brake device of the rear wheel brake through wires, a brake block comprises the following components including chromic oxide, aluminum powder, copper scraps, intermediate super abrasion furnace black, phenolic resin, barium sulfate, glass fiber, mica, natural rubber, an anti-aging agent, an accelerator, sulfur, zinc oxide, stearic acid and high aromatic oil, and the weight percentage of the components according to a formula is shown in the description.

The application discloses a magnet brake used for lifting equipment. The magnet brake has the advantages that brake blocks and a brake disc are separated completely when in power-on and pull-in, the brake effect is good, the noise is low, the comfort feeling is good, the reliability is high and the service life is prolonged. The magnet brake comprises a brake seat, an armature, a horseshoe, an electromagnet, the brake disc and the brake blocks; the electromagnet is mounted on the brake seat; the horseshoe and the armature are arranged on the left and right sides of the brake disc respectively; the brake blocks include a first brake block and a second brake block; the first brake block is arranged on the right side of the horseshoe; the second brake block is arranged on the left side of the armature, and the right side of the armature is close to the electromagnet; the brake disc is mounted on a tractor of the lifting equipment; a pin is mounted on a support plate of the tractor; the left part and the right part of the pin are connected with the horseshoe and the armature in a sliding manner respectively; a flange is arranged at the right end of the pin and positioned in a groove in the right side of the armature; a rubber ring sleeves the middle part of the pin; the radial center of the rubber ring and that of the brake disc are in the same line; the brake seat, the support plate and the horseshoe are fixedly connected.

The invention relates to a shaft brake trundle. A roller bracket comprises two side plates and a mounting bracket, wherein two side plates are mounted on two sides of a roller through roller shafts; brake pedals are arranged on the outer sides of the side plates; locking shoulders which are integrally connected with the side plates are arranged on the contact surfaces of the edges of the side plates and the brake pedals; a mounting bracket is fixedly connected to the upper ends of the side plate through bolts. A conventional brake mode that a vehicle is stopped by virtue of the friction between brake pads and the roller is changed into a brake mode that the rollers are axially pressed by pedals, so that not only is the brake effect relatively ideal, but also the defect of friction of the brake pads and the roller is avoided; as a device which is capable of adjusting the angle is designed between the mounting bracket and the roller, the height of the trundle is changed, and the roller is relatively flexible and convenient when being used.

The invention discloses a hydraulic clearance self-adjusting mechanism which comprises a shell, a piston, a first one-way valve and a reset spring. One side of the piston and the shell form a first cavity, the other side of the piston and the shell form a second cavity, and the shell is provided with an oil inlet used for enabling the first cavity to communicate with a brake master cylinder and anoil outlet used for enabling the second cavity to communicate with a brake. When the piston moves from an initial position to a closed position, the volume change amount of the second cavity is equalto the oil amount required by braking when a friction plate of the brake is not worn. The first one-way valve is used for being started when the piston moves to the closed position. The reset springis arranged in the shell and used for driving the piston to reset. When the hydraulic clearance self-adjusting mechanism is applied between the brake and the brake master cylinder, the oil amount of hydraulic oil entering the brake can be adjusted, the wear gap of the brake is compensated, and the braking effect of the brake is kept when the travel of a brake pedal is not changed. The invention further discloses a forklift brake system comprising the hydraulic clearance self-adjusting mechanism.

The invention discloses a brake band based on modified carbon fiber and a preparation method thereof. The brake band is prepared from the following raw materials in parts by weight: 35 to 45 parts of nitrile rubber, 15 to 25 parts of butadiene styrene rubber, 20 to 30 parts of modified carbon fiber, 3 to 5 parts of rubber accelerator, 2 to 4 parts of vulcanizing agent, 2 to 4 parts of 4020 anti-aging agent, 6 to 8 parts of graphite, 1 to 3 parts of nano kieselguhr, 2 to 4 parts of zinc stearate, 1 to 3 parts of nano titanium dioxide and 1 to 3 parts of nano silicon dioxide. The preparation method comprises the following steps: mixing the raw materials in a blender mixer so as to prepare a compression molding material, putting the compression molding material in a mold for compression molding, preparing blank through vulcanizing, cutting the blank, and preparing the brake band, wherein for compression molding, the pressure is 100 to 300 kg/cm<2>, the temperature is 100 to 200 DEG C, and the time is 5 to 15 minutes; for vulcanizing, the temperature is 120 to 160 DEG C, and the time is 0.5 to 1.5 hours. The brake band provided by the invention uses the modified carbon fiber to replace asbestos, a human body cannot be damaged, and the brake band has a good brake effect.

The invention discloses a pair of electric pruning shears. After the side, facing toward a shear blade (5), of an output gear (3) is sequentially connected with an abrasion-resisting plate (4) made of abrasion-resisting engineering plastic, a gasket (8) and a belleville spring (9), and the output gear (3) and the abrasion-resisting plate (4), the abrasion-resisting plate (4) and the gasket (8) as well as the gasket (8) and the belleville spring (9) abut against each other respectively through connection of a locking nut (7) and an eccentric block outer sleeve (11). By the adoption of the structure, the abrasion-resisting plate made of the abrasion-resisting engineering plastic high in abrasion resistance is adopted for being connected with the output gear in a contacting mode, damage to the abrasion-resisting plate caused by friction generated by slipping of the output gear can be reduced, service life can be greatly prolonged, and the speed reducing effect can be achieved within short time.

The invention discloses a novel braking buffer mechanism for a winch, which comprises a left hydraulic oil cylinder, a left oil cylinder piston rod, a right hydraulic oil cylinder, a right hydraulic oil cylinder piston rod, a synchronous connecting rod, wedged brake blocks, return springs and a winch brake disc; the power of the brake device is supplied by the left hydraulic oil cylinder and the right hydraulic oil cylinder; the working states of the left hydraulic oil cylinder and the right hydraulic oil cylinder are controlled; the wedged brake blocks are arranged on two sides of the winch brake disc; and a rolling bearing is arranged between every two vertically arranged wedged brake blocks. Therefore, the brake blocks have good braking buffer effects.

The invention discloses a distribution network differential protection method based on a dynamic time bending distance and a floating threshold. The method comprises the following steps: step 1, current sampling devices at two ends of a protected line in a distribution line carry out current signal sampling at a fixed frequency; step 2, when a current fault detection device detects that the distribution line has a break variable current fault, forming current sampling sequences i1 and i2 by current signals within A milliseconds before a fault moment and B milliseconds after the fault, wherein the current signals are collected by current sampling devices at two ends of a protected line; 3, negation is carried out on the normalized current sequence, and then DTW distance and differential protection floating threshold braking threshold value calculation is carried out on the negated current sequence and the normalized current sequence; and 4, calculating whether the DTW distance and the braking threshold value of the differential protection floating threshold meet the criterion or not. According to the method, the good tolerance of the dynamic time warping algorithm to the time domain is utilized, the floating threshold is added to prevent protection misoperation, and the protection reliability is improved.

The invention discloses a three-wheeled united braking control device of a right motor tricycle. The three-wheeled united braking control device of the right motor tricycle comprises a brake distribution shaft. A plurality of distribution shaft installation boards are arranged on the brake distribution shaft. The brake distribution shaft is transversely installed on the bottom of the motor tricycle through the distribution shaft installation boards. The left end and the right end of the brake distribution shaft are provided with a left rear wheel brake swing arm and a right rear wheel brake swing arm respectively. A foot brake swing arm and a front wheel brake swing arm are sequentially arranged on the brake distribution shaft from right to left. The front wheel brake swing arm is connected with a front wheel brake of the motor tricycle through a front wheel brake cable. The left rear wheel brake swing arm and the right rear wheel brake swing arm are respectively connected with a rear wheel brake of the motor tricycle through two rear wheel brake pull rods. The foot brake swing arm is connected with a foot brake pedal through a foot brake pull rod. The three-wheeled united braking control device of the right motor tricycle has the advantages that a front wheel brake operation mechanism and a rear wheel brake operation mechanism of the right motor tricycle are integrated on the brake distribution shaft, when braking is conducted, the foot brake pedal only needs to be trodden through a foot, a front wheel and rear wheels of the right motor tricycle are braked synchronously, the braking forces are identical, and the braking effect is good.

The invention provides a design scheme applied to a series excited machine for shutdown braking by using a bilateral stator exciting winding, which comprises wire harnesses W1, W2, W3 and W4, a stator winding A, a stator winding B and a motor armature winding M. The stator winding A and the stator winding B are connected in series, the two ends of the stator winding A and the stator winding B are respectively connected with the W1 and the W3, the two ends of the positive electrode and the negative electrode of the motor armature winding M are respectively connected with the W2 and the W4, and when the motor is electrified to operate, the W1 and the W2 are electrified, and the W3 and the W4 are conducted; when the motor runs and the machine encounters an emergency cover opening condition, the stator winding A, the stator winding B and the armature winding M are connected in series to form a closed loop through switch conversion, power failure of W1/W2, conduction of W1 and W4 and conduction of W2 and W3, the closed loop generates reverse induced current under excitation of a residual magnetic field of the armature winding of the series excitation motor, reverse torque is formed, and the stator winding A, the stator winding B and the armature winding M are connected in series. And the motor quickly stops running and braking, so that the braking function is realized. The braking time is greatly shortened, the braking effect is better, the motor only needs to be connected with four outgoing lines, and more cost is saved.

The invention provides a safety braking system applied to a driver training coach car. The safety braking system comprises a data acquisition module, a data calculation module, an instruction sending module and a braking execution module. According to the system, active braking execution conditions and braking instruction types are diversified, and selection, collocation and cooperative use are performed according to requirements and actual environments, so that the optimal braking effect is achieved, a user is assisted to execute braking, the system is more suitable for being used by a driving training vehicle, and the user experience can also be improved; a dynamic braking distance selection mechanism is carried out based on the vehicle state data, so that the safety is improved, and a balance point is found between the braking experience feeling and the safety; the safety brake execution grade is divided, and different brake requirements under different dimensions are met.

The invention discloses a multifunctional brake block for a vehicle. The brake block comprises a brake disc and two mounting chucks identical in specification, the two mounting chucks are symmetrically distributed on the two sides of the outer wall of the top end of the brake disc, and air inlets are formed in the outer walls of the top ends of the mounting chucks and the sides, away from the outer wall of the brake disc, of the mounting chucks respectively; a temperature regulator is fixed on the outer wall of one side of each mounting chuck through a bolt, and a heat dissipation guide edge adheres to the edge of the outer wall of the other side, away from the corresponding temperature adjuster, of each mounting chuck; through holes are formed in the outer walls of the mounting chucks, and air pipes are welded to the inner walls of the through holes; one ends of the air pipes are connected to the outer walls of the temperature regulators, and the other ends of the air pipes are arranged between the mounting chucks and the inner walls of the opposite sides of the brake disc. The brake block is installed in the mounting chucks, heat circulates between the brake block and the brake disc through the air pipes, and an upper linkage clamping plate is cooperatively used for carrying out auxiliary braking on the brake rubber block, so that the friction duration of a main brake block body is reduced, and the service life of the brake block is longer.

The invention belongs to the capstan field, and particularly relates to an electric capstan. The electric capstan comprises an electric control module, a motor module, a roller, a clutch, a first-level speed reduction assembly, a second-level speed reduction assembly, a third-level speed reduction assembly, a transmission shaft and a braking unit. A pressure inductor can recognize whether a third-level sun gear and a second-level planet carrier are completely engaged or not. After the third-level sun gear and the second-level planet carrier are completely engaged, a motor is started so that the capstan can be normally used. A friction block A and a friction block B are designed to conduct friction braking with a friction ring A and a friction ring B, so that braking is established betweenthe transmission shaft and the friction ring at the support position and between the transmission shaft and the friction ring at the roller position, and a better braking effect is achieved. When a coupler A and a coupler B relatively move, a rectangular spring can deform and rub with the friction block A and the friction block B, heat generated due to friction is little, and influences generateddue to rectangular spring failures can be neglected. Accordingly, the service life of the rectangular spring can be prolonged.