25results about How to "Improved braking stability" patented technology

The invention belongs to the technical field of application of brake materials for brake pads, and particularly discloses a friction material for a phase change heat storage composite brake pad, which comprises Cu powder, Cr powder, V powder, CuAlMn particles, graphene powder and graphite powder in a mass ratio of (40-60): (10-25): (0.1-1.5): (10-30): (0.5-1.5): (4-6). The friction material for the brake pad has the beneficial effects that the prepared friction material for the brake pad is low in friction coefficient, good in wear resistance and good in heat fading resistance, and the service life is prolonged; cu is used as a matrix, and Cr and V are used as reinforced matrix components, so that the material plays an important role in the overall strength and wear resistance of the material for the brake pad; the CuAlMn particles are adopted, so that unstable friction coefficient and brake failure caused by over-high temperature of the friction material for the brake pad under the high-temperature condition are effectively relieved; graphene and graphite are used as lubricating materials, so that the friction coefficient is effectively reduced and stabilized, and the thermal stability is improved.

The invention relates to a vehicle braking method, device and equipment, a storage medium, a vehicle and a program product, and relates to the technical field of automobiles. The method comprises the steps that the ABS state and a brake pedal signal of a vehicle are obtained; the brake pedal signal is used for reflecting whether the vehicle is in a braking state; and adjusting a brake recovery torque of the vehicle based on the ABS state and the brake pedal signal to brake the vehicle. Therefore, the situations of longitudinal deceleration loss and fluctuation possibly occurring when the automobile passes through the bumpy road surface can be reduced.

The invention relates to a ceramic product and a preparation method thereof, in particular to a preparation method of a carbon-ceramic brake disc with a composite friction layer and the carbon-ceramic brake disc, which are used for overcoming the defects that the production cost is increased and the large-scale application of the carbon-ceramic brake disc is restricted due to low material utilization rate in the manufacturing process of the carbon-ceramic brake disc. The preparation method of the carbon-ceramic brake disc with the composite friction layer sequentially comprises the following steps of preparation of the carbon-carbon composite material, rough machining, preparation of the heat conduction functional layer, preparation of the composite friction layer, ceramic treatment and finish machining. The heat conduction function layer can effectively reduce the temperature of the disc face in the braking process, the service life of calipers and other surrounding accessories is prolonged, the components of the composite friction layer are uniform and can be designed, and noise and shaking can be reduced in the braking process; in addition, the utilization rate of raw materials is improved and the production cost is reduced by using the residual stub bar. Meanwhile, the invention further discloses a carbon ceramic brake disc with the composite friction layer.

The invention discloses a brake control method and system of an electric vehicle, the vehicle and equipment. The braking control method of the electric automobile comprises the steps that an EBS controller obtains the currently needed total braking force according to a brake pedal opening signal; when the current required total braking force is larger than the current maximum braking force capable of being executed by the motor, the current maximum braking force capable of being executed by the motor is distributed to the motor for braking, and the difference value of the current required total braking force and the current maximum braking force capable of being executed by the motor is distributed to mechanical braking; and otherwise, only distributing the currently required total braking force to the motor for braking. According to the invention, motor braking is preferential, energy recovery is carried out to the maximum extent, and the energy consumption of the whole vehicle is reduced; motor braking and mechanical braking are processed by the EBS controller in a unified mode, stable braking force can be provided under various working conditions, the braking stability and safety are improved, and the braking effect of the vehicle is effectively guaranteed.

The present invention belongs to the field of bipedal robots, and specifically relates to a bipedal robot adopting a wheel-track deformable wheel system and a working method thereof, wherein the bipedal robot adopting the wheel-track deformable wheel system comprises a robot body and mechanical legs arranged on both sides of the robot body, and the mechanical legs comprise a rotating arm I, a rotating arm II and a wheel-track deformable wheel system. The bipedal robot adopting the wheel-track deformable wheel system provided by the present invention has a wheel-track deformable wheel system arranged at the end of the rotating arm II, so that the wheel-track deformable wheel is well integrated with the bipedal robot's bipedal feet, and can be switched among five working modes: a deformable wheel rim revolution drive mode, a track drive mode, an adaptive drive mode, a brake mode and a leg drive mode.

The invention belongs to the technical field of brake friction materials and powder metallurgy, and discloses a preparation and regulation method for a three-dimensional latticed structure in a copper-based brake friction material. The copper-based brake friction material is mainly composed of copper-coated iron powder, molybdenum disulfide, crystalline flake graphite, silicon dioxide, superfine copper powder and other functional components. Wherein the three-dimensional latticed structure is constructed by superfine copper powder, and the comprehensive performance of the copper-based brake friction material is improved through multiple excellent performances such as high heat conduction performance and mechanical strength of the three-dimensional latticed structure; according to the invention, structural design and preparation are carried out on raw material powder by adopting a method of prefabricated particle preparation and particle bonding and coating, so that all functional components are uniformly distributed on the friction material, a three-dimensional latticed structure can be constructed, and the mechanical property and tribological property of the friction material are greatly improved; the copper-based brake friction material is high in mechanical performance, stable in friction coefficient, high in heat conduction performance, low in wear rate and excellent in performance under extreme working conditions.

A composite anti-lock braking intelligent control method based on real-time estimation of turning angle relates to the technical field of vehicle braking control, and comprises the following steps: step 1, obtaining a vehicle ABS wheel speed signal and vehicle basic parameter information; step 2, estimating the vehicle turning angle θ in real time based on the Ackerman steering principle and a two-degree-of-freedom vehicle model, and identifying the vehicle turning condition; step 3, calculating the vehicle slip rate in real time; step 4, setting the activation condition of the composite anti-lock braking control strategy according to the vehicle slip rate and the relative wheel speed of the rear wheels, if the vehicle slip rate and the relative wheel speed of the rear wheels both meet the activation condition, then executing the composite anti-lock braking control strategy, otherwise executing the conventional driving braking control strategy. The present invention can estimate the vehicle turning angle in real time according to the acquired vehicle ABS wheel speed signal and vehicle basic parameter information, and accurately identify the vehicle turning condition, thereby providing accurate data support for the calculation of the vehicle slip rate.

The utility model relates to the technical field of wind turbine generator unit, in particular to a kind of yaw brake mechanism of wind turbine generator unit, comprising: pedestal, independently fixedly arranged in the interior of tower body;Brake disc, coaxially installed on rotating main shaft, yaw gear ring is coaxially installed on brake disc outer wall, and brake disc is provided with multiple groups of corrugated structure's heat dissipation holes in axial direction, and the radial section of heat dissipation hole is S type airflow passage;Hydraulic brake unit is installed on pedestal by support mechanism, two friction plate assemblies are arranged on hydraulic brake unit, and brake disc is located in the middle of two friction plate assemblies;It improves brake efficiency, and increases brake stability.

The present application relates to the technical field of automobile brake, and particularly relates to a brake caliper with synchronous wear of friction plates, comprising a caliper body, friction plates, a pushing mechanism and a bidirectional friction mechanism, wherein the bidirectional friction mechanism comprises a synchronization unit for controlling two friction plates to simultaneously abut against a brake disc; the present application can solve the following problems existing in the prior art: the hydraulic reaction force is relied on to push the caliper body to float to realize double-side braking of the brake disc, which causes the two friction plates to have action lag, and the two friction plates cannot simultaneously contact the brake disc, resulting in non-synchronous wear of the two friction plates; the friction plates cannot self-adaptively level, which causes the friction plates to fail to self-adaptively form surface contact when abutting against the brake disc, and local eccentric wear is prone to occur, which aggravates the wear speed of the friction plates and shortens the service life of the friction plates; the present application solves the core problems of non-synchronous wear and eccentric wear of the friction plates through the cooperative action of the lever synchronous driving of the bidirectional friction mechanism and the self-adaptive leveling of the pushing mechanism.

The present invention belongs to the technical field of brake actuators, and specifically relates to an oil-electric hybrid brake device. The brake device includes a caliper frame and a caliper body slidably connected to the caliper frame; the caliper body has a jaw that can accommodate a brake disc; friction plates are provided on the caliper body and on both sides of the jaw, respectively recorded as the first friction plate and the second friction plate, and a hydraulic drive device and an electric drive device are relatively provided on the caliper frame and on both sides of the caliper body; the hydraulic drive device can push the first friction plate to move in the direction close to the second friction plate, and the electric drive device can push the second friction plate to move in the direction close to the first friction plate. The present invention not only shortens the braking response time, but also improves the braking force, effectively solving the defect that the traditional EPB braking response speed and braking force cannot be taken into account at the same time. At the same time, the present invention has the dual functions of service braking and parking braking, and has the advantages of good braking stability and less space occupation.

The invention relates to the technical field of electric scooters, and discloses a motor and brake combined type electric scooter which comprises a motor assembly, a brake disc set and a rear wheel part, the motor assembly comprises a motor part and a motor shaft, the motor part is used for driving the motor shaft to rotate, the brake disc set comprises a brake plate and a brake, and a plate tooth set is formed on the periphery of the brake plate. The plate tooth set and the motor shaft are arranged in a meshed mode, the brake plate and the rear wheel piece are assembled, the brake plate is used for driving the rear wheel piece to rotate, the brake plate and the brake are assembled, and the brake is used for braking the brake plate. During driving, the motor part drives the brake plate to drive the rear wheel part to rotate, and driving of the scooter is met; during braking, the brake brakes the brake plate to limit rotation of the rear wheel piece, and braking of the scooter is met; the combination of the brake disc group and the motor assembly reduces the occupied space, and the brake plate and the rear wheel piece have a larger contact area, so that the brake of the rear wheel piece is more timely and stable, the brake effect and the brake stability of the scooter are improved, and the driving safety is improved.

The present disclosure provides an EBD fault adaptive fault-tolerant control method and system, which comprises: collecting vehicle braking related parameters; judging the EBD fault type through cross verification, model prediction residual analysis and CAN communication threshold comparison of the braking related parameters respectively; calculating the fault error corresponding to the EBD fault type, judging the EBD fault level based on the fault error corresponding to the EBD fault type and the preset grade interval threshold; executing the corresponding fault disposal measures according to the EBD fault level, and determining the wheel braking force distribution coefficient; adjusting the braking pump pressure of each wheel, and executing the braking force distribution coefficient. The scheme of the present disclosure can improve the braking efficiency under different EBD faults, and guarantee the braking stability and safety.

The present application relates to the technical field of vehicle electronic control, in particular to a time-varying optimal slip rate prediction and control method for electric vehicles based on time delay characteristics. The time-varying optimal slip rate prediction method in the present application takes the utilization adhesion coefficient, real-time slip rate and time delay factor of the current section as input, combines the known parameters of the reference section, and accurately calculates the time-varying optimal slip rate with the help of the correlation function. The motor braking torque calculation method based on the time-varying optimal slip rate takes the predicted time-varying optimal slip rate as the control target, first establishes a state space equation with the slip rate and its first derivative as state variables and the motor braking torque as the control variable, and discretizes it into a model suitable for digital control, then constructs a cost function that minimizes the slip rate tracking error and torque jump at the same time, obtains the optimal motor braking torque sequence by optimization, and finally outputs the first control variable in the sequence to realize accurate braking of the vehicle.

The invention provides a multi-redundancy intelligent braking system for a heavy vehicle and a control scheme of the multi-redundancy intelligent braking system. The multi-redundancy intelligent braking system comprises a regenerative braking layer; a continuous retarding brake layer; a friction brake layer; the integrated control unit is connected with the regenerative braking layer, the continuous retarding braking layer and the friction braking layer, and when a driver braking request signal and a vehicle state signal are received, the integrated control unit sends corresponding instructions to all the braking layers according to a preset cooperative control strategy so as to distribute needed braking force. The three braking layers and the integrated control unit connected with the three braking layers are arranged, the three braking layers are mutually backed up, even if one layer (even two layers) fails, the system can still provide effective braking, and the braking safety and the braking stability are effectively improved.

The utility model discloses a cable blooming equipment hydraulic drive braking device which comprises a first supporting plate and a second supporting plate, a winding drum is arranged between the first supporting plate and the second supporting plate, one side of the first supporting plate is provided with a brake disc, one side of the first supporting plate is fixedly connected with an installation base, and the other side of the first supporting plate is fixedly connected with the installation base. A hydraulic driving cylinder is fixedly connected to the upper end of the mounting base, a brake block is fixedly connected to one side of the hydraulic driving cylinder, a transmission motor is fixedly connected to one side of the second supporting plate, a worm is fixedly connected to an output shaft of the transmission motor, and a driving driving wheel and a driven driving wheel are rotationally connected to one side of the second supporting plate; a worm gear is fixedly connected to one side of the driving wheel, and a transmission belt is arranged on the surface of the driving wheel and the surface of the driven wheel. The hydraulic driving cylinder, the brake block and the brake disc are adopted for braking the winding drum, and the braking effect and the braking stability are greatly improved.

The present invention relates to the technical field of medical devices, and in particular to a conveying device for conveying a self-expanding stent. The conveying device comprises a shell assembly, a catheter mechanism, an operating mechanism and a braking mechanism. The catheter mechanism is arranged on the shell assembly, the operating mechanism is rotatably arranged on the shell assembly, the operating mechanism is transmission-connected to the catheter mechanism, the braking mechanism comprises a braking unit and an orientation unit, the braking unit is rotatably arranged on the shell assembly, the orientation unit is fixedly arranged on the shell assembly, the braking unit is transmission-connected to the operating mechanism, a plurality of braking parts are arranged on the braking unit, a braking gap is formed between two adjacent braking parts, the orientation unit cooperates with the braking gap, a plurality of braking parts are annularly arranged on the outer peripheral wall of the braking unit, the braking range is wider, the movement accuracy of the braking unit is improved, the braking unit is suitable for the needs with higher requirements for position and posture control, the adaptability is stronger, and the structure is simple, thereby improving the braking efficiency and stability.

The present application relates to a kind of hanging rail inspection systems, comprising: track and inspection robot;The inspection robot includes: robot main body, the auxiliary wheel group being set on the upper side of robot main body, drive wheel group and brake device;The robot main body is based on the auxiliary wheel group clamping hoist in the lower side of track, wherein auxiliary wheel group is set apart with two in the direction of travel of inspection robot;The drive wheel group is provided with the driving roller that abuts with the lower side of track;The driving roller is provided with magnetic attraction wheel part, and magnetic attraction wheel part and the radial dimension of driving roller body are different;The position of the lower side of track is partially provided with the iron condition with the width less than the width of track, and along the width direction of track, the arrangement position of iron condition corresponds with magnetic attraction wheel part;When the driving roller moves to the position of iron condition, the main body of the driving roller keeps abutting with the lower side of track, and magnetic attraction wheel part is attracted to iron condition.

The invention discloses a multi-guide-rail ball falling protector and a working method thereof.The multi-guide-rail ball falling protector comprises a main side plate, a front brake cutter, a rear brake cutter, a rope tying plate and a torsional spring and further comprises a limiting wheel shaft set, a limiting wheel and a ball pressing assembly; bottom sliding edges extending towards the vertical wall of the guide rail are arranged at the bottoms of the main side plates, the vertical wall of the guide rail is inserted between the two bottom sliding edges in a penetrating mode, and the head of the guide rail is limited between the bottom sliding edges and the limiting wheels. The limiting wheel is installed between the front brake cutter and the rear brake cutter through the limiting wheel shaft set, and a limiting arc groove matched with the head of the guide rail is formed in the middle of the limiting wheel. The multiple ball pressing assemblies are symmetrically arranged on the inner end face of the bottom sliding edge, and balls of the ball pressing assemblies are pressed on the surface of the vertical wall of the guide rail. The anti-falling device can be suitable for various types of guide rails, the vertical walls of the guide rails can be pressed, and deflection of the anti-falling device is avoided.

A single-sided dual-caliper front axle for commercial light trucks includes a front axle and a steering knuckle rotatably mounted on the outer end of the front axle. A carbon-ceramic brake disc is supported on the outside of the steering knuckle shaft via a bearing unit. A hub flange is fixed to the outer end of the carbon-ceramic brake disc. The inner and outer friction pads of each set of brake calipers correspond to the two sides of the friction surface of the carbon-ceramic brake disc, respectively. A mounting plate is fixed to the inner side of the steering knuckle, and a set of brake calipers is fixed to the front and rear of the mounting plate, respectively. This utility model is the first to design and match a single-sided dual-caliper front axle for commercial vehicles. By designing the two sets of brake calipers in series, the braking force is doubled, achieving the braking torque of similar air brakes, solving the problem of insufficient braking force of hydraulic brakes. The brake disc, made of a new type of carbon-ceramic material, is particularly suitable for electric vehicles with frequent braking, high braking temperatures, and high requirements for braking stability.

An electronic parking system and a control method thereof relate to the technical field of vehicle chassis braking. The electronic parking system comprises a double control valve, a parking reservoir, a differential relay valve, a brake chamber, an ABS solenoid valve, a temporary parking relay valve, a vehicle controller and a service brake reservoir in communication with the temporary parking relay valve; the parking reservoir is in communication with the double control valve and the differential relay valve respectively; the double control valve is in communication with the parking brake control port of the differential relay valve; the gas outlet of the differential relay valve is in communication with the second gas inlet of the brake chamber; the temporary parking relay valve is in communication with the brake chamber through the ABS solenoid valve; and the double control valve and the temporary parking relay valve are electrically connected with the vehicle controller. The electronic parking control method comprises the electronic parking system. The electronic parking system and the control method thereof are provided to solve the technical problems of high production cost of the whole vehicle, complex control logic of the EPB system and easy occurrence of over-braking of the traditional braking mode to cause wheel locking.

The utility model belongs to lamp auxiliary device technical field, concretely points to controllable type lamp special lift, including shell one and shell two, shell one and shell two are set up and are pasted, shell one and shell two are pasted and form the inside installation space, the installation space in shell one and shell two pasting is provided with brake assembly and power board subassembly, be provided with the pivot on shell two inner wall, the pull line wheel is sleeved on the pivot, the pull line wheel is wound with the lifting line, one end of lifting line is wound in the pull line wheel outer periphery, the other end of lifting line is used for connecting the lamp to be lifted, the pull line wheel is connected with the lifting spring between the pivot, through the electric control, mechanical cooperation control of power board subassembly and brake assembly, can realize accurate braking and stable stay in any position in the lamp lifting process, realize the accurate control of lamp lifting, improve brake stability and structural reliability, prolong the service life of device.

The application relates to the technical field of vehicle motor control, and discloses a double-motor cooperative control system and method for a mine-used double-driver trackless rubber-tyred vehicle, which comprises the following steps: collecting running state data, driver operation data and roadway environment data of the mine-used double-driver trackless rubber-tyred vehicle in real time, analyzing the real-time state of the vehicle, and constructing a first state vector; configuring a double-motor cooperative control mechanism, analyzing the state constraint constructed by the first state vector, respectively calculating target torques of a first driving motor and a second driving motor, and obtaining a first torque instruction; respectively controlling the working processes of the first driving motor and the second driving motor, and collecting state data of the motors in real time; respectively sending the state data of the first driving motor and the second driving motor to a controller of a motor on the opposite side, comparing the rotating speeds of the two motors, calculating corresponding compensation torques, and optimizing the control process of the motors; and the application can improve the driving stability and controllability of the vehicle under complex working conditions, and guarantee the safety of underground personnel and equipment.

The invention discloses a new energy commercial vehicle brake-by-wire system equivalent braking force control method, and relates to the technical field of new energy vehicle brake-by-wire. On the basis of an equivalent braking force method, under the same braking strength request of an intelligent driving system, the total braking force output by composite braking is consistent with that during pure mechanical braking, electric braking force is preferentially used during braking, the braking force of a front motor and the braking force of a rear motor are distributed according to a pre-distribution coefficient # imgabs0 #, if the electric braking force does not meet the braking requirement, hydraulic braking force makes up, and if the electric braking force does not meet the braking requirement, the hydraulic braking force makes up for the braking requirement. And the hydraulic braking system distributes the hydraulic braking force according to the distribution coefficient # imgabs 1 #. By the adoption of the method, a brake system does not need to be transformed, an intelligent driving system does not need to be matched again, only the vehicle brake-by-wire function needs to be flexibly and rapidly matched through the intelligent chassis, a large amount of calibration work of commercial vehicle composite braking is reduced, and the development period is shortened; meanwhile, the driving mileage can be effectively increased, the response speed of a braking system is increased, and the braking characteristic of an original vehicle and the driving habit and braking feeling of a driver are not changed.

The invention discloses a three-way forklift braking device and a braking method, relates to the field of forklift braking, and solves the problems that when an existing three-way forklift braking device is used, the braking mode is single, the braking mode is difficult to switch according to wheel transportation and braking states, and the braking stability is difficult to improve. Comprising a forklift body, a driving brake mechanism, an auxiliary brake mechanism and a control mechanism, a driving wheel, a driven wheel and a driving motor are arranged on the forklift body, the driving brake mechanism comprises a brake disc and a driving shaft, the auxiliary brake mechanism comprises a fixing cylinder and a rotating column, and the control mechanism comprises a safety pedal, a running pedal and an emergency stop button. The driving brake mechanism is controlled to enable the brake disc to conduct limiting brake control on the driving shaft, the auxiliary brake mechanism is used for conducting limiting brake control on the rotating column, the stability in the driving and parking process is improved, and the control mechanism controls the running states of the driving brake mechanism and the auxiliary brake mechanism according to the driving and parking requirements.