155results about How to "Improve braking reliability" patented technology

A braking system having a master cylinder to which wheel brake circuits (I, II) can be connected, a first piston coupled to a brake pedal, a second piston by means of which the master cylinder is actuated, a third piston actuated by the first piston and connected in a force transmitting fashion to the second piston, a simulation device which gives the driver of the vehicle a pedal sensation, an intermediate space between the second piston and third piston, a hydraulic chamber which is bounded by the third piston and when necessary, a movement of the third piston in the actuating direction is prevented, a pressure generating device which controls the pressure in the intermediate space, a pressure medium reservoir vessel which is under atmospheric pressure and which can be connected hydraulically to the intermediate space, and means for electrically controlling the pressure in the intermediate space.

A brake unit that allows the vehicle to evacuate safely in the event of brake failure while maintaining a braking performance. The brake unit is mounted on a vehicle together with a motor drive unit 2 to control brake force in accordance with a stroke of a brake pedal and a pedal force. Each brake system comprises: a stroke sensor; a pedal force sensor; a brake mechanism applying brake force to a driveshaft; a controller controlling the brake mechanism based on the stroke and the pedal force; and a powersource supplying electricity to the brake mechanism and the controller. The first controller 13 and the second controller support each other to control brake force.

A method for performing an emergency stop with an elevator and a safety arrangement of an elevator are disclosed. In the method, when an emergency stop criterion is fulfilled, the elevator car is driven with the electric motor of the hoisting machine to a stop with a given deceleration profile.

The invention relates to an electronic brake for braking by utilizing the kinetic energy of vehicles, which consists of calipers, a brake disc, a support, a front left gear, a front right gear, a servo motor, a reversing gear shaft, a synchronous belt, a rear right gear assembly, a rear left gear assembly, a magnetorheological clutch, a power take-off gear shaft, a right friction plate, a left friction plate, a leading screw nut, a wear-resisting sleeve, a leading screw rod, a piston and a controller. In the electronic brake, the vehicles are braked by utilizing the kinetic energy, so the action time of the brake is shorter at a higher vehicle speed, the braking effect is better; and the electronic brake has the advantages of low energy consumption, quick response speed, simple structure,low cost and the like, and can utilize braking energy effectively, promote braking torque quickly, realize integrated control such as antilock brake system (ABS), electronic brake force distribution (EBD) and the like, improve braking efficiency effectively and improve the driving safety and braking reliability.

The invention belongs to the technical field of design and manufacturing of underground coal mine subsidiary transport equipment parts, and provides a heavy shuttle car hub driving system integrating differential respective drive and wet-type brake. The problem that the existing shuttle car brake system is poor in steering differential function, large in brake impact and the like is solved. A drive front axle and a drive rear axle of a shuttle car are respectively controlled by two driving systems which are connected with each other in parallel; each driving system comprises a motor, a single-reduction gearbox, a hub reduction gear I and a hub reduction gear II; each hub reduction gear I and the corresponding hub reduction gear II are symmetrically mounted at two ends of a transverse transmission shaft of a corresponding shuttle car drive axle, and are positioned on the inner side of a corresponding walking rubber wheel of the shuttle car; the hub reduction gears I are connected with an outputting end of the single-reduction gearbox through transmission shafts; and the single-reduction gearbox is driven by the motors. By the two driving systems which are connected with each other in parallel, problems of abrasion of tires, eccentric load of the hub reduction gears and the like are solved, and motor power utilization rate is improved.

The invention discloses a rail train and a shaft box structure of the rail train. The shaft box structure comprises a shaft box body and a positioning joint installing base (112), a bearing installing cavity (1a) is formed in the shaft box body, the positioning joint installing base (112) is provided with an installing cavity used for installing a positioning joint, the longitudinal center line of the shaft box body is parallel to the longitudinal center face of the positioning joint installing base (112), and the longitudinal center face of the positioning joint installing base (112) deviates to the outer side relative to the longitudinal center face of the shaft box body. Accordingly, large space can be reserved for a brake clamp, and the brake clamp and a wheel pair are convenient to install and replace. Compared with the prior art, the shaft box structure is optimized, a brake clamp installing position has a larger available space, installation of relatively large brake clamps is facilitated, braking capacity is improved, and the performance of the whole train is improved. Besides, the positioning joint is installed close to the outer side so that the positioning joint can be easily installed and detached.

The invention discloses a garden tool used rotating axial direction brake device that is made up of working shaft, driven wheel, casing and brake block. The working shaft connects rotating connects to the casing, and the brake block is set on the casing. The working shaft screw connects to driven wheel. Bulges are set on the out surface of the driven wheel. Moving component is fixed on working shaft. When the power for the invention is cut, inertia difference is existed between working shaft and the rotators installed on the working shaft to the driven wheel, and causes relatively rotating between working shaft and driven wheel. Then, the driven shaft would move to the axial direction until contacting to the brake block. Thus, the requirement for the material quality would be declined. And it is simple structure and is easy to machined and maintained.

The invention discloses an electric vehicle with a vacuum pump control system. The electric vehicle with the vacuum pump control system comprises a vehicle controller, a vacuum pump, a vacuum pressure sensor, an ambient pressure sensor, a speed sensor and a braking sensor. A controlling method for the electric vehicle with the vacuum pump control system comprises the following steps that step A, the vehicle controller controls the motor output torque in the recycling and braking process according to speed and braking pedal switch signals; step B, signals are detected according to the ambient atmospheric pressure; step C, the relative pressure range of braking is determined, the absolute pressure range in a vacuum system is calculated, and whether starting the vacuum pump body is needed or not is determined; step D, opening degree signals and the changing rate of the opening degree of the braking pedal are collected to determine whether gas leaking is existed in the prior vacuum system or not; and step E, if gas leaking in the vacuum system is determined, the vehicle controller brakes enforcedly to reduce the speed until the vehicle is stopped, and an emergency light is turned on. According to the electric vehicle with the vacuum pump control system, the basic performance of the vacuum pump can be improved, running braking stability and reliability of the electric vehicle can be improved, running safety of the vehicle is ensured, applicability is high, and practicability is good.

A method for performing an emergency stop with an elevator and a safety arrangement of an elevator. In the method, when an emergency stop criterion is fulfilled, the elevator car is driven with the electric motor of the hoisting machine to a stop with a given deceleration profile.

The invention provides an unmanned vehicle braking control system and method. The unmanned vehicle braking control system comprises an electric cylinder, a braking pipeline system, a data collection card, a controller, a decision making layer, a wheel speed sensor for detecting vehicle speed and an oil pressure meter for detecting braking pressure of the braking pipeline system, the data collection card is used for collecting data of the wheel speed sensor and the oil pressure meter, the decision making layer sends an expected vehicle speed signal to the controller, and the controller is used for collecting data transmitted by the decision making layer and data of the oil pressure meter. Braking effect controllable in braking force is accurately realized by collecting current vehicle speed and current braking pressure, comparing them with expected vehicle speed and expected braking pressure and controlling extension and contraction of the electric cylinder.

A brake fluid pressure control device controls brake fluid pressures through control of fluid pressure control valves operated in accordance with control signals from, for example, a computer. Signal lines for supplying control signals to control circuits controlling coils of linear valve devices for some wheels (e.g., front-left and rear-right wheels) are connected to a brake ECU by a connector, and signal lines for supplying control signals to the control circuits controlling coils of linear valve devices for other wheels (e.g., front-right and rear-left wheels) are connected to the brake ECU by a different connector. Thus, even if one of the connectors starts operating abnormally, it is possible to supply control signals via the signal lines connected by the other connector and control linear valve devices for some of the wheels (e.g., a pair of diagonally located wheels).

A permanent magnet synchronous towing machine without gear wheel includes the stator, rotor and the brake equipment. The stator frame, the stator case and the shoring cover are cast as a whole. Arc type permanent magnets are affixed to the inner side of the rotor wall along the direction of circle. Shaft is mounted on the axle hole of the axle housing of the rotor. The iron cords are pressed to the outer side of the shorting cover along direction of the circle. The rotation coder is positioned on the back end of the shaft. The stretch type electromagnetic brake providing thrust in bi-directional is mounted between two brake arms on the base. The brake shoes with hinge jointed on the brake arms are fitted on the symmetrical two sides of the outer wall of the rotor. The towing wheel is fixed on the circular bead of the end part.

A reinforcement type electromagnetic mechanical brake is composed of a movable board, a disc spring, a fixing shell, a coil, a first support, a mandrel pushing rod, a first hinge pin assembly, a second hinge pin assembly, a swing arm, a first nut, a tightly-pulling rod, a second nut, a pair of first calipers, a first friction plate, a brake disc, a second friction plate, a third hinge pin assembly, a third friction plate, a pair of second calipers, a fourth friction plate, a pushing cylinder, a second support, a thrust ball, a thrust board, a locating bolt, a first pulling rod, a sleeve, a second pulling rod, a baffle ring, a bolt and an extruding board assembly. The reinforcement type electromagnetic mechanical brake has the advantages that cost is effectively saved, the installation space is saved, energy consumption is low, the response speed is high, repair is convenient, the structure is simple, cost is low, the braking torque can be rapidly improved through effective use of a force-amplifier, integrated control over an ABS, an EDB and the like can be achieved conveniently, brake temperature rise can be effectively reduced through the friction plates, the braking efficiency is improved, and the traveling safety and the braking reliability are improved.

The present invention belongs to a three-force side shoe drum type clearance independence spacing self regulating instantaneous center brake for auto wheel. The characteristics of the invention is the bearing hole of the braking base plate fixes upper, lower supporting shoe pin roll, mutually symmetrical and locating on the two sides of the horizontal axis, the upper and the lower supporting hoof pin roll are packed with an upper and lower brake shoes, the upper and lower bearing holes of the upper and lower brake shoes are set with the upper and lower ratchet wheel coupling double working surfaces cams; the horizontal axis of the braking base board has a camshaft, the upper and lower bearing shoe pin roll and the camshaft form polarization braking center triangle; the upper and lower positioning pawl pin rolls are set on the extending part of the upper and lower braking shoes, the upper and lower locating pawl bearing hole is set on the braking plate, the claw is connected to the ratchet tooth. The invnetion acquires small abrasion of the brake braking working surface, having no noise, realizing optimal braking time, optimal braking deceleration, optimal braking distance, maximum force value and optimal force balancing effect, ensuring auto operating safety.

The invention discloses an automatic brake device and an automatic brake method of an automobile capstan. The device comprises a shaft cover, a brake shaft and a spiral clutch mechanism, wherein the spiral clutch mechanism comprises a cone brake part, a torsion spring and a convex lug plate; the brake shaft is provided with a single-row tapered roller bearing; the single-row tapered roller bearing is provided with a brake cone sleeve jointed with the cone brake part; the outer edge of the bake cone sleeve is provided with a spline which is meshed with an inner gear ring of a capstan winding drum. When a motor driving shaft rotates, the shaft cover makes clockwise rotation, the cone brake part is driven to rotate, and the torsion spring is extruded to move towards the left, so that the cone brake part is separated from the brake cone sleeve; when the motor driving shaft stops rotating, the cone brake part makes counterclockwise rotation to reset under the action of the torsion spring, the cone brake part move towards the right and is jointed and tightly held with the brake cone sleeve which runs at low speed, and the brake shaft stops rotating, so that the function of braking is reached. The device is simpler in structure, easy to operate, rapid in assembly, high in brake reliability, low in working temperature and long in service life.

The invention discloses a pneumatic electronic parking brake integrated valve which is used for connecting with an air storage tank and a parking brake air chamber. The integrated valve comprises a relay valve assembly (M5), a solenoid valve assembly (M234), a parking brake controller assembly (M10), an upper shell (55) and a lower shell (101), the relay valve assembly (M5) comprises a relay valve (5), the solenoid valve assembly (M234) comprises a first solenoid valve (2), a second solenoid valve (3) and a third solenoid valve (4), the parking brake controller assembly (M10) comprises a parking brake controller (10), the upper shell (55) is detachably and fixedly connected with the lower shell (101), the solenoid valve assembly (M234) is adjacent to the relay valve assembly (M5), the mounting surface of the solenoid valve assembly (M234) is mutually perpendicular to that of the relay valve assembly (M5), both the solenoid valve assembly (M234) and the relay valve assembly (M5) are arranged in the upper shell (55), and the parking brake controller assembly (M10) is arranged at the bottom of the integrated valve and mounted in the lower shell (101). According to the integrated valve, the parking brake controller, three solenoid valves and the relay valve are effectively integrated, pipeline connection is simplified, manufacturing and assembling of components are simplified, and the integrated valve is compact in structure, low in cost and reliable in performance.

The application of the invention discloses a brake control method for an electric vehicle. The brake control method comprises the following steps of: receiving pedal displacement information which comprises pedal displacement and pedal displacement time; simulating a curve for pedal displacement changing with time according to the pedal displacement information, and calculating the slope of the curve for pedal displacement changing with time; and sending a reverse current request signal to control a drive motor to drive reversely when a failure of a wheel side brake occurs or the slope of the curve for pedal displacement changing with time is greater than or equal to the slope of a set emergency braking critical curve. According to the brake control method, in the emergency braking working conditions of the electric vehicle, the drive motor is started to drive reversely to be braked together with the wheel side brake, so that compared with a braking manner by the wheel side brake alone, the brake control method has the advantages that the vehicle brake deceleration is increased, and the emergency braking distance is shortened, when a failure of the wheel side brake occurs, the drive motor is started to drive reversely, and the braking reliability is enhanced. The application of the invention also discloses a brake control device and a brake system.

The invention relates to a braking system, in particular to a braking system suitable for an articulated rubber wheel trolley bus with 3-5 carriages. The technical problems that in the prior art, a barking system cannot meet the braking demand of the articulated rubber wheel trolley bus with the 3-5 carriages is solved. The braking system suitable for the articulated rubber wheel trolley bus withthe 3-5 carriages comprises an air source and two braking units; each braking unit comprises a braking pedal; the braking pedals are arranged in cabs of the carriages at the two ends correspondingly;the braking units further comprise braking control parts and braking executing parts; the braking control parts comprise emergency braking triggering loops and braking controllers; the braking executing parts comprise steering shaft braking executing units and power shaft braking executing units; the braking units communicate with vehicle control units and pulling control units through buses; andthe braking units communicate through a bus.

The invention discloses a safe drum brake which comprises a casing, a pair of brake shoes and a brake arm assembly, wherein one end of each of the brake shoes is rotatably connected on the casing, a brake wheel connected with the brake arm assembly is arranged between the gap of the other ends of the pair of the brake shoes, a pin roller is butted between the brake wheel and each of the brake shoes, and the pin roller is in tooth meshing with the brake shoes. As the roller is in tooth meshing with the brake shoes, the pin roller can be effectively prevented from slipping during braking, the braking reliability of the drum brake is improved, and simultaneously, the dislocation of the roller can be prevented, the stability of movement of the pin roller is improved, and the braking stability of the drum brake is further improved.

The invention provides an anti-falling device and an anti-falling method. The anti-falling device comprises a guide rail, a self-locking device, a safety belt and the like, wherein the guide rail is provided with at least one clamping seat which protrudes the matrix surface of the guide rail, the upper end face of the clamping seat is a clamping face clamped and braked with a clamping block of the self-locking device, and the height of the clamping seat is gradually reduced from the clamping face of the upper end to the part of the lower end protruding the matrix of the guide rail; and the self-locking device comprises the clamping block and a body, wherein the clamping block is movably connected with the body through a rotating pin shaft, the clamping block is provided with a clamping head, the clamping block can rotate by using the rotating pin shaft as a center, and the clamping head extends out of the bottom surface of the body to realize locking braking with the clamping seat on the guide rail. The anti-falling device has better stress performance, and has safer and more reliable braking performance between the guide rail and the self-locking device; and by using the device and the method, normal action and overhauling operation of an operator are not affected at the same time of protecting the safety of the operator.

The invention discloses a brake-by-wire device for a driverless racing car. The brake-by-wire device for the driverless racing car comprises a brake motor, a reducer, a driving rocker arm, a right angle pulling rod and a driving pilling plate lifting lug, wherein the reducer is fixedly connected with an output shaft of the brake motor, and two baffles are arranged near the circumference of an output shaft of the reducer in an opposite mode; one end of the driving rocker arm is fixedly connected with the output shaft of the reducer, a circular through hole is formed in the upper end of the driving rocker arm, and two grooves are formed in the inner wall of the through hole along the circumference in an opposite mode; the baffles are matched with the grooves in an opposite mode; one end of the right angle pulling rod is hinged to the other end of the driving rocker arm; and one end of the driving pulling plate lifting lug is hinged to the other end of the right angle pulling rod, and theother end of the driving pilling plate lifting lug is hinged to the upper end of a brake pedal. According to the brake-by-wire device for the driverless racing car, under the premise of braking reliability, the brake and the unmanned brake do not interfere with each other.

The invention discloses an electric vehicle brake energy feedback system. The system comprises a battery recharging prevention loop and a discharge resistor loop, wherein the battery recharging prevention loop is used for blocking electric energy obtained by motor reverse mechanical energy recycling conversion from charging a battery on the condition that the electric quantity of the battery is high, and recharging and energy storage cannot be performed; the discharge resistor loop is used for preferentially supplying the electric energy obtained by motor reverse mechanical energy recycling conversion to whole vehicle accessories as demand on the condition that the battery recharging prevention loop blocks the electric energy obtained by motor reverse mechanical energy recycling conversionfrom charging the battery, and then excessive electric energy is consumed through the discharge resistor loop. On the condition that the electric quantity of the battery is high, and recharging and energy storage cannot be performed, it is ensured that the electric retarding function is normal, the brake security and reliability are improved, the energy utilization rate is increased, and abrasionto a brake friction plate is lowered.

The invention discloses a vehicle composite braking control method, device and system, as well as a vehicle composite braking controller. The method comprises the following steps: calculating to determine a total braking force needed by a vehicle, and calculating to determine exerted braking forces needed by various braking modes, respectively distributing the braking forces to the corresponding controller, and realizing vehicle braking by the controller in response to the distributed output braking forces. The method, device and system, as well as the controller are capable of solving problems that in the prior art, braking force response is slow, the efficiency is low and the reliability is poor, and have the advantages of better braking control efficiency, better reliability and the like.

The invention relates to a brake and power equipment. The brake comprises a first brake part, a second brake part and a drive device, wherein the first brake part is rotationally arranged around the center axis; the second brake part is non-rotationally arranged in the circumferential direction relative to the center axis; the drive device is used for driving the second brake part to reciprocate along the center axis to control the brake to be switched between a brake state and a non-brake state; an axial bulge extending axially along the center axis is arranged at one of the first brake part and the second brake part, and an accommodation space is formed in the other brake part; the axial bulge is located in the accommodation space and forms circumferential limit fit when the brake is in the brake state; when the brake is in the non-brake state, the axial bulge is separated from the accommodation space, so that circumferential limit fit is eliminated. According to the brake, a traditional structure that braking is realized through brake pads is eliminated, the service life of the brake is prolonged, and the safety and the reliability of the brake are improved.

A toggle-rod-boosted electromechanical brake consists of a brake disc, a caliper, a support, a first pin shaft assembly, a connecting component, a second pin shaft assembly, a first connecting rod, a third pin shaft assembly, a fourth pin shaft assembly, a second connecting rod, a fifth pin shaft assembly, a motor speed reducer assembly, a first friction plate, a second friction plate, a third connecting rod, a sixth pin shaft assembly, a ball screw assembly, a push cylinder and an opening cylinder sleeve. The toggle-rod-boosted electromechanical brake can effectively save cost and reduce the installing space, has the advantages of low energy consumption, high response speed, convenience in maintenance, simple structure, low cost and the like, can effectively use a boosting mechanism for rapidly increasing the braking torque, can conveniently implement ABS, EDB and other integrated control, and improves the traffic safety and the brake reliability.

The invention discloses an electronic mechanical brake, and belongs to the technical field of automobile braking. The electronic mechanical brake comprises a shell, a ball screw structure and a piston. A clamp is arranged on one side of the shell and comprises two clamping claws capable of oppositely moving; each of the two clamping claws is provided with a friction plate, the two friction platesare right opposite to each other, and a penetration cylinder hole is formed in the other side of the shell. The ball screw structure is arranged in the cylinder hole and comprises a screw, a nut and aplurality of steel balls, one end of the screw penetrates out of the cylinder hole and is in driving connection with an executer, the nut can movably sleeve the outer side wall of the screw in the length direction of the screw, two clamping and connecting tables are arranged on the outer side of the nut, and the multiple steel balls are arranged between the nut and the screw. The piston is arranged in the cylinder hole, one end of the piston is connected with one clamping claw, and the other end of the piston movably makes contact with the nut in the screw length direction. According to the provided electronic mechanical brake, the structure is simplified, the integral size is reduced, and the braking efficiency is improved.

The invention discloses an electronical control air pressure regulating valve for a commercial vehicle line control brake system and a control method thereof, and relates to the technical field of vehicle braking. The regulating valve comprises a motor, a valve body and a valve cover, the valve cover is installed at two ends of the valve body, the side wall of the valve body is provided with an air inlet, an air outlet and an exhaust port, the valve body internally comprises a power cavity, a displacement adjusting cavity and an air inlet cavity, a coupling, a screw and a screw sleeve are arranged in the power cavity, the screw sleeve is sleeved on the periphery of the screw, the coupling is connected with the screw and a rotating shaft of the motor; a micromicrowatt, a traction member andan ejector pin are arranged in the displacement adjusting cavity, the micromicrowatt is in contact with the screw sleeve, the traction member is respectively and elastically connected with the micromicrowatt and the ejector pin, a switch piston and a return spring are arranged in the air inlet cavity, the switch piston is in contact with the ejector pin, the switch piston is connected with the return spring, and the return spring is fixedly connected with the valve cover. The embodiment of the invention can solve the problem that the regulating valve in the prior art uses the gas as a mediumfor transmitting signals, and has asynchronized braking of each wheel, uncoordinated braking and small braking force.

A combined electronic mechanical brake is composed of a motor, a bracket, a speed reducer, a first clamp, a first friction plate, a second friction plate, a brake disc, a third friction plate, a second clamp, a fourth friction plate, a fixed bracket, a thrusting plate, a first ball bar, a sleeve, a second ball bar, a fixed bolt, a baffle ring, a thrusting ball, a screw rod, a nut, a first thrusting cylinder, a wear resistant sleeve, a second thrusting cylinder and a positioning bolt. When in use, the combined electronic mechanical brake can effectively reduce the motor power and save mounting space, has the advantages of low energy consumption, high response speed, convenience in maintenance, simplicity in structure, low cost and the like, can effectively utilize a force amplifying mechanism to quickly increase the braking torque, so as to conveniently realize ABS, EDB, and other integrated control, adopts multiple friction plates to effectively reduce the temperature rise during braking, increase the braking efficiency, and improve the driving safety and the braking reliability.