1275results about "Slack adjusters" patented technology

The invention discloses a long downhill section truck brake pad high temperature detection and cooling method and system, and the method comprises the steps: collecting the surface temperature data of a truck brake pad in real time according to high-precision infrared temperature sensor arrays and thermal imagers disposed at the two sides of a long downhill section, and generating a time-space correlation temperature field distribution diagram; based on the temperature field distribution diagram, dynamically adjusting a temperature safety threshold curve through reinforcement learning, and outputting a dynamic early warning trigger signal; according to the dynamic early warning trigger signal, a corresponding spraying instruction is generated so as to drive a piezoelectric ceramic microvalve array of a roadside spraying device to conduct spraying cooling on the brake pad; and according to the temperature attenuation rate and infrared thermal image feedback data of the brake pad after spraying, the temperature safety threshold curve and the spraying instruction are corrected through a Bayesian optimization algorithm, and closed-loop safety regulation and control are formed. According to the embodiment of the invention, the temperature of the brake pad can be monitored in real time, accurate spraying cooling control is realized, and safe and stable braking performance of a truck is ensured.

The invention discloses an aircraft wheel cooling method and device, and the method comprises the steps: collecting the temperature of a brake disc and the air pressure of a hub in real time through a temperature and pressure sensor, calculating the temperature change rate and the pressure difference through an embedded processing module, and generating a thermodynamic initial parameter set; calculating a thermal stress distribution value of the brake disc based on the initial parameter set, and generating a cooling liquid flow and spraying angle instruction set in combination with a material threshold database; the opening degree of an annular pipeline piezoelectric valve is regulated according to an instruction set, an injection area is regulated according to flow velocity-surface area heat exchange efficiency, and waste heat is synchronously recovered to optimize power consumption; the thermal infrared imager obtains temperature field distribution, the initial parameter tolerance range is compared, the spraying angle and the flow instruction are corrected through a fuzzy PID algorithm, and temperature gradient errors are eliminated; and based on the temperature drop rate, the pressure stability and the waste heat recovery efficiency, an efficiency index is generated by using a neural network scoring model, and algorithm weights and piezoelectric valve response parameters are dynamically adjusted. The cooling efficiency is effectively improved, and the thermal stress risk is reduced.

In particular, the invention relates to an electromechanical brake, a machine, a wear readjustment device and a method or procedure, whereby the electromechanical brake comprises an actuator, a transmission unit, a brake lining and a friction surface, the actuator which is moving in a limited actuator actuation range, the actuator which is executing a lining stroke over at least a portion of its actuator actuation range via the transmission unit, whereby the transmission unit has a non-linearity, i.e. a transference ratio which is not constant over at least part of the actuator operating range, and whereby the transference ratio of the transmission unit is selected and / or configured in such a way that at least two subsections with differently acting non-linearities are formed along the actuator operating range.

Provided is an electromechanical brake system comprising an actuator of an electromechanical brake operated by a motor, the electromechanical brake system including: a motor driving unit configured to drive the motor; and a control unit configured to be electrically connected to the motor driving unit, wherein the control unit is configured to: calculate a first rotation angle of a spindle in a brake apply mode of the electromechanical brake, calculate a second rotation angle of the spindle in a braking release mode of the electromechanical brake, and when a difference between the calculated first rotation angle and the calculated second rotation angle exists, control a notification device to notify a wear state of a brake pad.

An air cooled resistor arrangement comprising a first elongated tube member forming a first air flow channel and a second elongated tube member forming a second air flow channel, wherein the first elongated tube member is at least partly housed inside the second elongated tube member. The air-cooled resistor arrangement further comprises an air dilution portion comprising at least one opening at which the first air flow channel is arranged in fluid communication with the second air flow channel.

The invention discloses a thermal management method and device of a brake disc, computer equipment and a storage medium. The thermal management method of the brake disc comprises the steps that a whole vehicle fluid mechanics model is used for calculating convective heat transfer coefficients of all positions on the brake disc at the current vehicle braking moment; obtaining the temperature of each position on the brake disc at the current vehicle braking moment and the vehicle speed at the current vehicle braking moment; according to the convective heat transfer coefficient and the temperature of each position on the brake disc and the vehicle speed of the vehicle, the temperature variation of each position on the brake disc is calculated; predicting a temperature peak value on the brake disc at the next moment according to the temperature variation and the temperature of each position on the brake disc; and when the temperature peak value on the brake disc at the next moment does not meet the preset temperature condition, a cooling system of the vehicle is controlled to cool the brake disc till the temperature peak value on the brake disc meets the preset temperature condition. According to the method, the heat dissipation effect of the brake disc is enhanced.

A control method for an electro-mechanical brake including a piston configured to push a brake pad toward a wheel disk through driving of a motor, the control method for an electro-mechanical brake including: detecting positions of the piston and current values of the motor while braking is performed; detecting piston position-based estimated braking force values based on the detected positions of the piston; detecting current-based estimated braking force values based on the detected current values of the motor; determining that a state of the brake pad has changed from an initial state to another state when the piston position-based estimated braking force values and the current-based estimated braking force values are different from each other; determining whether a thickness or physical property of the brake pad has changed when determining that the state of the brake pad has changed from the initial state to the other state; setting a new home position by compensating for a preset home position when determining that the thickness of the brake pad has changed; and detecting an actual braking force value based on a movement distance of the piston from the new home position, wherein the home position refers to a position set so that the piston is disposed at the position at the time of non-braking.

An electromechanical braking system with wear compensation and a vehicle. The electromechanical braking system includes a caliper body, two friction plates, a gain bridge, a stud, and a drive apparatus, the gain bridge, one friction plate, the other friction plate, and the stud are arranged sequentially, the gain bridge is configured to movably connect the caliper body and the one friction plate, and the stud is configured to drivingly connect the caliper body and the other friction plate; the drive apparatus is configured to: drive the gain bridge and the one friction plate, and drive the stud and the other friction plate; and the drive apparatus is further configured to drive, through a unidirectional torque limiting apparatus, the stud to rotate relative to the caliper body along an axis of the stud. The embodiments improve reliability of the electromechanical braking system.

A brake cooling system, comprising a pressurized air source configured to supply compressed air. A flow passage extends from the pressurized air source to a vicinity of a brake assembly, and has an outlet directing the air towards the brake assembly. At least one de Laval nozzle is provided in the flow passage to increase speed and reduce temperature of air passed through the de Laval nozzle. A valve controls fluid communication between the air source and the de Laval nozzle. When the valve is closed, air is prevented from reaching the de Laval nozzle. When the valve is open, air is allowed to pass through the de Laval nozzle. A temperature sensor senses the temperature of a brake assembly. If the temperature is above a predefined limit, the valve becomes opened, and air is passed through one or series of de Laval nozzle and to the brake assembly.

The invention discloses an electromagnetic disc brake with a gap automatic compensation function, and relates to the technical field of electromagnetic disc brakes, the electromagnetic disc brake comprises a mounting base and a connecting shell, one side of the mounting base is provided with a shell, an electromagnet is mounted in the mounting base, one side of the electromagnet is provided with an armature, and the armature is connected with the shell. One side of the armature is connected with multiple sets of reset springs, and one end of each reset spring is fixed to the inner side of the shell. According to the electromagnetic disc brake with the gap automatic compensation function, the gap between the armature and the electromagnet can be detected through the microswitch, and when the gap exceeds the range, the thin hydraulic cylinder can be started to drive the hydraulic plunger head to push the armature to move, so that the gap between the armature and the electromagnet returns to normal, and compensation is completed; the sealing mechanism can prevent external dust from making contact with the armature and other components, so that the braking effect is kept, and the heat dissipation mechanism can dissipate heat of the braked components.

The utility model relates to the technical field of brakes, and provides an electromagnetic brake convenient to adjust an air gap, which comprises a stator, an armature and a brake disc which are sequentially arranged in the axial direction, and further comprises a dustproof flange cover, the dustproof flange cover is arranged outside the stator in a matched mode, and the brake disc is arranged between the dustproof flange cover and the armature; an air gap measuring hole is formed in the side of the dustproof flange cover, and a locking screw used for abutting against the stator is screwed into the side of the dustproof flange cover. According to the utility model, the air gap can be adjusted more quickly and conveniently, and the operation is simple.

The utility model provides a torque adjusting structure of a hydraulic retarder, and belongs to the technical field of hydraulic retarders. The oil cooler comprises a middle cover, a rear cover and an oil cooler body, the rear cover is connected with the middle cover and the oil cooler body through fastening screws, oil through holes are correspondingly formed in the rear cover and the oil cooler body, throttling ring installation grooves are formed in the side wall, close to the oil through holes, of the rear cover, and throttling rings are arranged in the throttling ring installation grooves. The throttling ring mounting groove is located at the end of the oil through hole and communicates with the oil through hole, and a throttling ring is arranged in the throttling ring mounting groove; by means of the design that a traditional throttling piece is changed into the throttling ring, use of a locking screw is avoided, the throttling ring can be directly arranged in a specially-designed installation groove in a buckled mode, the assembling and maintaining process of the device is simplified, and the throttling ring can be replaced more rapidly and conveniently; and when the throttling ring needs to be replaced, only the oil cooler needs to be disassembled, the process of disassembling and assembling the throttling piece is omitted, and the damage probability of the device is reduced while more convenience is achieved.

The utility model relates to a disc brake assembly with a single-push structure, and belongs to the field of brakes. The disc brake assembly of the single-push structure comprises a force increasing mechanism, an adjusting mechanism and a braking mechanism, the adjusting mechanism comprises an adjusting and shifting sleeve, a one-way bearing, an inner adjusting sleeve, an adjusting and rotating shaft, an adjusting sleeve and a torsional spring, the adjusting and shifting sleeve is provided with a shifting pin which is located in a shifting groove of a mounting groove, the adjusting and shifting sleeve is provided with a hole for installing the one-way bearing, and the inner adjusting sleeve is installed in an inner hole of the one-way bearing. An adjusting shaft is arranged in the middle of the inner adjusting sleeve, the lower portion of the adjusting shaft is sleeved with the torsional spring, an adjusting sleeve is arranged outside the torsional spring, and a concave-convex embedded structure is arranged between the adjusting sleeve and the threaded push rod. The gap is adjusted by the single adjusting shaft, the adjusting speed is balanced, the problem of inconsistent master and slave adjusting gaps is avoided, and the problem of small brake contact area caused by non-uniform friction of the brake blocks is avoided.

The invention discloses a thermal management valve with a double-ball-valve structure, which comprises a valve body, a double-ball-valve assembly and an electric control driver, the valve body is provided with a bypass water path, a first large circulation water path, a second large circulation water path, a small circulation water path and a liquid buffer water path, the double-ball-valve assembly comprises a first valve ball and a second valve ball, and when the valve is in a closing position, the first valve ball and the second valve ball are closed. The first and second large circulating waterways are simultaneously closed, the small circulating waterway is fully opened, and the bypass waterway is fully opened; when the valve is located at a 90-degree opening position, the first large circulating water path and the second large circulating water path are fully opened, the small circulating water path is closed under the condition that bypass quantity is reserved, and the bypass water path is fully opened; when the valve is in a 180-degree opening position, the first large circulation water path and the second large circulation water path are fully opened, and the small circulation water path and the bypass water path are closed under the condition that the bypass amount is reserved. According to the valve, the flow control valve of the hydraulic retarder and the thermostat valve of the engine cooling system are integrally arranged, so that the arrangement space of an engine is saved, and the reliability of the engine is improved.

The invention discloses a high-stability electromagnetic brake convenient to disassemble and assemble, and relates to the technical field of brakes. Comprising a shell, a base is installed on the top of the shell through a connecting shaft, a rotating shaft channel is formed between the base and the top of the shell in a penetrating mode, an armature is arranged on the portion, located on the surface of the rotating shaft channel, between the base and the shell in a sleeving mode, an electromagnetic coil is arranged in the shell, and an installation mechanism is arranged at the bottom of the shell. A compensation assembly is arranged at the top of the armature, a rotating disc is rotationally connected to the position, located on the surface of the periphery of the rotating shaft channel, in the cavity in the device shell, a connecting rod is arranged in the armature in a limiting mode, an unlocking assembly is arranged at the bottom of the shell, and the armature and the shell are installed easily and can be operated by one person; gaps in all directions between the armature and the electromagnetic coil are ensured to be the same, adjustment is easy, and automatic compensation after the brake pad is abraded is achieved.

To provide high braking performance at a more affordable cost than hydraulic disc brakes by combining mechanical advantage and control cable technology.SOLUTION: The present invention relates to a cable actuated disc brake system (100) that is designed to address mismatching of the performance and cost between drum brakes and hydraulic disc brakes. Utilizing a floating caliper design, the system (100) allows engagement of one brake pad to trigger a caliper (101) to float and engage with the other pad. The system uses components such as a caliper (101), a caliper cap (102), a cam lever (103), an upper cam (104), a lower cam (105), a spherical rollers (106), an adjuster (107), a piston (108), a spring (109), multiple mounting bolts (110), and a dust cap (111), to combine mechanical advantage and control cable technology.SELECTED DRAWING: Figure 2

The utility model discloses a gap adjusting drum brake which comprises a brake bottom plate and two brake shoe friction plate assemblies which are symmetrically and movably installed on the brake bottom plate, one ends of the two brake shoe friction plate assemblies are connected through a gap adjusting device, and the other ends of the two brake shoe friction plate assemblies are connected through a brake push rod. One end of the brake push rod is connected with the brake zipper through a brake pull rod; the gap adjusting device comprises an adjusting sleeve and an adjusting core which are arranged in a sleeved mode, a ratchet wheel is connected to the adjusting core in a threaded mode, and the end of the adjusting core extends out of the ratchet wheel and then is located in the adjusting sleeve. The gap adjusting device is installed between the two brake shoe friction plate assemblies, the gap between the drum brake and the brake drum is adjusted by adjusting the length of the gap adjusting device, and the braking effect is improved.

The invention discloses a self-cooling rotary brake based on magnetorheological solid-liquid phase change, and belongs to the field of magnetorheological fluid braking. The working temperature of the magnetorheological fluid brake is crucial to the braking performance of the magnetorheological fluid brake. The brake is mainly composed of a wind generating set and a magnetorheological fluid brake with a self-function heat dissipation function, in service, a fan turbine (1) drives a rotating shaft (9), a rotor (10), a brake disc (6) and fan blades (15) to rotate under the action of wind power, the rotor and a stator (3) convert wind energy into electric energy, the brake disc immersed in magnetorheological fluid (14) restrains the rotating speed of the rotating shaft, and the fan blades (15) are driven to rotate. And meanwhile, the fan blades at the bottom continuously discharge air from the ventilation holes (11) to the bottom of the brake along the outer surface of the magnetorheological fluid disc shell (13). According to the structure, the working characteristics of the rotary brake are utilized, the draft fan blades are designed at the bottom of the rotating shaft, air flow of the disc containing cylinder containing the magnetorheological fluid is accelerated, and the magnetorheological fluid can be kept at the low temperature without an additional radiator.

Proposed is a method for setting a clearance of a disc brake for a motor vehicle, wherein the disc brake includes a brake caliper, a brake piston, a brake disc, brake pads, at least one drive unit, which is assigned to a brake pad and by which a restoring force can be applied to the assigned brake pad, and at least one sensor, which is assigned to the at least one brake pad coupled to the drive unit, wherein the method comprises determining a physical value of the brake pad, comparing the physical value with an assigned predefined limit value or a predefined limit-value range, and, if necessary the brake pad is adjusted by an assigned drive unit. Also proposed is a brake pad and a service brake for a motor vehicle.

Various systems and methods for braking a vehicle are provided. In one embodiment, a brake assembly is provided that includes a lever attachment interface pivotally coupled with two degrees of freedom to a joint between a first lever and a second lever and a brake cylinder coupled to the first lever and designed to engage and disengage a brake lining in a brake component. The brake cylinder includes a slack adjuster configured to adjust a throw of the second lever.

The invention provides a running-in method of an adjuster in a gap self-adjusting mechanism, and belongs to the technical field of machinery. The problem that due to the fact that the coaxiality of a main shaft, a neck bush and a transmission gear is poor, slipping torque has large fluctuation is solved. The method comprises the steps that A, a main shaft, a neck bush and a transmission gear are installed on a tool by simulating the actual assembly condition, the tool is vertically installed on a supporting base in a sliding mode, a supporting spring is arranged on the supporting base, and the upper end of the supporting spring abuts against or indirectly abuts against the lower end of the transmission gear; and B, the tool is jacked downwards through a jacking mechanism, a torque output mechanism is used for driving the main shaft to rotate, and a torque sensor is used for monitoring the slipping torque between the neck bush and the transmission gear till the fluctuation value of the slipping torque between the neck bush and the transmission gear in the set number of turns is smaller than a set value. The device has the advantages that the coaxiality of the main shaft, the neck bush and the transmission gear can be well guaranteed, and the fluctuation of the slipping torque between the neck bush and the transmission gear is small.

The utility model relates to the technical field of automobile manufacturing, and discloses a novel heavy-duty vehicle brake drum which comprises a drum body, a plurality of heat dissipation holes are formed in the top of the drum body, a heat dissipation disc is fixedly connected to the outer wall of the drum body, a plurality of cooling holes are formed in the outer wall of the heat dissipation disc, and cooling pipes are fixedly connected to the inner walls of the cooling holes. The inner wall of the cooling pipe is slidably connected with a heat exchange pipe, the inner wall of the heat exchange pipe is fixedly connected with a cooling pipe, and the inner wall of the cooling pipe is fixedly connected with a flow limiting hole. According to the utility model, the drum body rotates to drive the heat dissipation disc to rotate, and liquid in the heat exchange pipe flows and exchanges heat with liquid in the cooling pipe for cooling under the action of centrifugal force, so that the purpose of actively cooling the brake drum for a long time is achieved, and the reduction of the brake performance of a vehicle caused by high-temperature deformation of the brake drum due to high temperature is avoided; the safety of the vehicle is improved, and the probability of accidents is reduced.

The invention relates to an electromechanical spreading device (2) for a drum brake of a vehicle, comprising: an electric motor (4) having an output (6); a cam disc (12) which is connected to the output (6) in a torque-transmitting manner and which is arranged between two actuating elements (8, 10) for simultaneously actuating the two actuating elements (8, 10) in a braking action, a first actuating element (8) of the two actuating elements having a spring element (18) which is arranged between an actuating tappet (14) and a support (16), and a second actuating element (16) of the two actuating elements having a spring element (18) which is arranged between the actuating tappet (14) and the support (16), wherein the cam disc (12) is connected in a torque-transmitting manner to an actuating disc (20) of a step gear (22) and the step gear (22) is connected in a force-transmitting manner to a second actuating element (10) of the two actuating elements, in such a way that the second actuating element (10) can be adjusted in the direction of a brake shoe movable thereby by means of a rotation of the cam disc (12) in an engagement angle range of rotation in a first direction of rotation, and can be adjusted by means of the cam disc (12) The stepping gear (22) has an engagement angle range in which rotation in a second direction of rotation, which extends opposite the first direction of rotation, is adjusted away from the brake shoe in the opposite direction, in which engagement angle range the operating disc (20) is in torque-transmitting engagement with the rest of the stepping gear (22).

The invention discloses a brake device for rail transit. The brake device comprises a movable disc seat, a movable disc, a static disc, a bearing, a shell and a cylinder cover. The movable disc seat is pressed on the axle in an interference mode, the bearings are installed on the two sides of the movable disc seat, and the movable disc and the movable disc seat are installed in a matched mode and rotate circumferentially along with the axle. The static discs are arranged on the two sides of the movable disc, the static discs and the shell are installed in a matched mode, meanwhile, the shell is installed on one bearing, and the outer side of the shell is connected to a bogie swing arm to restrain circumferential rotation. The cylinder cover is mounted on the other bearing, and an oil cylinder brake shoe stack adjuster and an oil way are mounted on the cylinder cover; the edge of the shell and the edge of the cylinder cover are connected in the circumferential direction to package the movable disc and the static disc. When a vehicle is braked, pressure is applied to the oil cylinder through the oil way on the cylinder cover, the oil cylinder pushes the static disc to press the movable disc, and the movable disc and the static disc enable axle wheels to decelerate until the axle wheels are static through pressure friction torque. The braking device has the axial floating adaptation characteristic, meanwhile, the friction area is increased, and the braking heat bearing capacity is improved.

The invention relates to a motorcycle disc brake assembly and belongs to the motorcycle disc brake technology, the motorcycle disc brake assembly comprises a brake disc assembly and a caliper assembly, one end of the brake disc assembly is located in the caliper assembly, the brake disc assembly comprises a disc body, a notch of an annular structure is formed in the disc body, and a water spraying ring is rotationally installed in the notch; a connecting hard pipe is fixedly installed at one end of the water spraying ring, the caliper assembly is composed of a fixed caliper mechanism and a movable caliper mechanism, a cleaning assembly used for cleaning the brake disc assembly is obliquely connected to the upper end of the fixed caliper mechanism in an inserted mode, the disc body of an I-shaped structure is arranged, fins are installed in the disc body, the air flow speed at the position of the disc body is increased, and the brake disc assembly is more stable. The heat dissipation performance is improved, water is sprayed to the positions of the fins during braking through the water spraying ring, the heat attenuation effect is reduced, the cleaning assembly in sliding clamping connection is adopted, replacement is convenient and fast, differential rotation is conducted between the brush and the disc body during riding, the surface of the disc body is conveniently cleaned, and dust adhesion is avoided.

A brake apparatus for a vehicle may include: a pair of screw bars located in a caliper body; a pair of nut parts configured to cover outsides of the respective screw bars, engaged with the respective screw bars, and selectively moved toward a brake pad or moved to an opposite side of the brake pad; a pair of piston parts moved with the nut parts, and configured to apply pressure to the brake pad when pressed by the nut parts or remove the pressure applied to the brake pad when a pressing of the nut parts is removed; an elastic spring installed on each of the piston parts, and configured to apply an elastic restoring force to cause the piston part to return to an original position; and a spring retainer mounted on each of the piston parts, and brought into contact with the elastic spring.

An apparatus for a brake drum of a vehicle having a drum brake assembly with first and second brake shoes includes a motor with a pinion gear. A ball screw assembly has a nut for receiving torque from the pinion gear and a spindle threaded with the nut. The nut is aligned with the first brake shoe and the spindle is aligned with the second brake shoe. The motor is actuatable for rotating the nut to move the nut and the spindle away from one another for moving the brake shoes to apply braking force to the brake drum during a braking event. A bi-stable locking mechanism selectively locks the motor to prevent torque transfer from a back-driving ball screw assembly to the motor.

A motor control device includes a torque command calculation unit that calculates a torque command value, a current command calculation unit that calculates a current command value, a power converter, and a stop position adjuster. The stop position adjuster executes a stop position adjustment process that adjusts the rotation stop position within a specified position adjustment range when a lock current is applied while the rotation of the multiphase motor is stopped, except in cases where specified exemption requirement is met. In the stop position adjustment process, the stop position adjuster adjusts the rotation stop position so as to bias the current to one or more high heat dissipation phases having a relatively high heat dissipation property among the phases. The torque command calculation unit or the current command calculation unit calculates a torque command value or a current command value reflecting an adjusted rotation stop position.

The present invention relates to an electromechanical braking device (1) for a motor vehicle, comprising at least one electric brake actuator (4) with a brake element (32) which is adjustable and can be brought into brake engagement with a counter-brake element (2), wherein the brake actuator (4) can be controlled by an electric control unit (100). In order to enable improved operational reliability in continuous operation, the invention proposes that the control unit (100) be integrated with the brake actuator (4) and that a heat dissipation element (45) be thermally coupled to the control unit (100), which is thermally conductively connected to or has an exposed outer surface (46) of the brake actuator (4).

The invention relates to an inertia preventing device with a torque testing function, and relates to the technical field of inertia preventing devices, the inertia preventing device comprises a motor, a shaft steel sleeve, an inertia wheel, a friction column, a spring, an adjusting screw rod and a force measuring piece, the shaft steel sleeve is arranged on an output shaft of the motor in a sleeving mode; the inertia wheel is coaxially and fixedly connected with the shaft steel sleeve; the friction column is mounted in the inertia wheel; one end of the spring is fixedly connected with one end, far away from the shaft steel sleeve, of the friction column, and the other end of the spring is connected with the adjusting screw rod; one end of the adjusting screw rod is rotationally connected to the inertia wheel, and the other end of the adjusting screw rod is propped against one end, far away from the friction column, of the spring; the two ends of the force measuring piece are connected with the friction column and the inertia wheel respectively, and the force measuring piece is used for detecting the friction force between the friction column and the inertia wheel. The method has the effect of improving the system stability.