483 results about "Brake shoe" patented technology

A brake system may include: a drum; a brake shoe including a frictional member applying frictional force to the drum; a motor moving the brake shoe; a force sensor detecting clamping force of the frictional member to the drum; and a controller electrically connected to the motor and the force sensor, and the controller may determine a first position of the frictional member to the drum at a braking force generation start time based on current applied to the motor or torque of the motor upon controlling the motor for braking, and control the motor so that an interval between the drum and the frictional member is adjusted based on the first position when the force sensor is in a failure state upon controlling the motor for releasing the braking.

The invention discloses an electrically-driven mechanical tread brake unit which comprises an electric brake cylinder, a hoisting arm, a brake-shoe hoist, a brake-shoe holder and a brake-shoe, the electric brake cylinder is provided with a motor located in a shell, and further provided with a planetary gear assembly connected with an output shaft of the motor and a planetary roller screw rod driven by the planetary gear assembly; the planetary gear assembly comprises a sun gear coaxially connected with an output shaft of the motor, an inner gear ring fixed to the shell, a planet gear meshed between the sun gear and the inner gear ring in a tooth meshing mode and a planet carrier connected with the planet gear, the planet roller lead screw comprises a lead screw shaft, a roller and a nut, and the planet carrier is provided with an outer gear ring. A transmission gear is fixed to a nut of the planetary roller lead screw, and an outer gear ring on the planet carrier is meshed with the transmission gear. The planetary gear and the planetary roller lead screw are arranged to replace a traditional force amplification mechanism, low-power output and large torque are achieved, and meanwhile the functions of manually resetting the lead screw and preventing the lead screw from being stuck in the fault state can be achieved.

The invention discloses a powder metallurgy brake shoe for a locomotive and a preparation method, and relates to the technical field of metallurgy brake shoes, the powder metallurgy brake shoe comprises the following raw materials by mass percentage: 50%-70% of a matrix component, 10%-18% of a reinforcing component, 10%-16% of a lubricating component and 10%-16% of a friction component; the matrix component comprises electrolytic copper powder; the reinforcing components comprise reduced iron powder, superfine iron powder, atomized nickel powder, molybdenum powder and zinc powder; the lubricating component comprises artificial graphite and sulfide. According to the invention, the performance reduction of the brake shoe and the decline of a matrix at high temperature are effectively inhibited, the stability of a friction coefficient is kept, the abrasion is reduced, and the service life is prolonged.

The invention relates to the technical field of damage identification, in particular to a structural defect identification method for brake shoe displacement and damage characteristics of a railway wagon, which comprises the following steps of: in the whole life cycle of the railway wagon, dividing a braking process into a plurality of stages, and performing hierarchical filing according to working condition types and service stages, constructing a brake shoe multi-working-condition structure response file; through longitudinal comparison along a time axis in the same working condition layer and transverse comparison among different working condition layers, screening out a brake shoe ectopic evolution mark and an initial brake shoe damage evolution mark which are sensitive to a structure state; encoding all evolution marks according to a spatial position, a working condition layer and a service stage to form a brake shoe ectopic and damage structure fingerprint sequence; and outputting an identification result including the structure defect type and the severity level, and generating a maintenance priority. According to the method, a space-time coupling mechanism of acoustic emission energy and temperature gradient is introduced to recognize early microcrack propagation, and the recognition sensitivity of recessive fatigue and complex damage modes is improved.

The invention relates to a brake shoe and brake head connecting structure, an assembling method and a railway vehicle, the brake shoe and brake head connecting structure comprises a brake shoe and a brake head, the brake head comprises a first side plate and a second side plate, a connecting plate is arranged between the inner edges, used for being matched with the brake shoe, of the first side plate and the second side plate, and a hole is formed in the middle of the connecting plate. Protrusions are arranged at the two ends of the connecting plate, a spring piece is fixed to the back face, used for being matched with a brake head, of the brake shoe, a first bent part is arranged at the end of the spring piece, the first bent part wraps the protrusion at the corresponding end so that the spring piece can be connected with the connecting plate in a clamped mode, and an outwards-protruding structure in the middle of the spring piece penetrates through an opening in the middle of the connecting plate. By the adoption of the connecting structure, the defects existing when a brake shoe bolt is adopted are overcome.

The utility model relates to a brake shoe clamp, which relates to the technical field of railway vehicle maintenance equipment and is used for solving the problems of complicated process and low carrying efficiency of a manual brake shoe carrying mode. The brake shoe clamp comprises a first clamping arm which partially extends into the first through hole to prevent the brake shoe from rotating; the second clamping arm and the first clamping arm are oppositely arranged in the first direction, and the second clamping arm partially extends into the second through hole to prevent the brake shoe from rotating; the driving mechanism is connected with the first clamping arm and the second clamping arm, and the driving mechanism is used for driving the first clamping arm and the second clamping arm to get close to each other or get away from each other in the first direction; the first clamping arm and the second clamping arm can be close to each other in the first direction so as to clamp the protrusion. The brake shoe clamp is matched with an external manipulator, so that mechanical carrying of the brake shoe can be realized. Therefore, the carrying efficiency of the brake shoe is improved.

The utility model provides a bogie device for track engineering machinery. The bogie device for the track engineering machinery comprises four sets of primary suspension devices which are installed at the positions, close to the two sides, of the bottom of a framework respectively. Two axles are installed at the positions, close to the two sides, of the bottom of the framework through axle box devices respectively, wheels are installed at the two ends of each axle respectively, lever type foundation braking devices are installed at the positions, close to the two sides, of the bottom of the framework respectively, each lever type foundation braking device comprises two braking levers, and the braking levers are arranged on the two sides of the framework respectively. The top end of one brake lever is provided with a horizontal lever body through a connecting rod, and the other end of each horizontal lever body is provided with a brake cylinder. According to the bogie device for the track engineering machinery, the basic braking capacity of a vehicle is effectively improved by increasing the configuration number of the brake shoes, the cost reduction effect is obvious compared with a unit brake type basic braking device, and meanwhile higher application stability is achieved.

A freewheel assembly has a hub, a brake mechanism, and at least one switch. The hub has an axle, a hub shell mounted around the axle, a drive screw disposed at one of two ends of the hub shell; and a sprocket mounted around the drive screw and having an inner shell and an outer shell. The inner shell is screwed with the drive screw and has a first engaging notch. The outer shell is mounted around the inner shell and has a second engaging notch. The brake mechanism has a clutch cone configured to be driven by the drive screw to move along the axle and at least one brake shoe disposed to an exterior circumference of the clutch cone. Each switch is screwed to the outer shell and has an engaging block engaging with at least one of the first engaging notch and the second engaging notch.

The invention discloses an RTK and inertial navigation fused intelligent brake shoe accurate positioning algorithm, and particularly relates to the technical field of GNSS and inertial navigation system fusion. According to the algorithm, a double-difference observation model is constructed based on GNSS pseudo-range and carrier phase observation values, and high-precision fusion positioning is realized through extended Kalman filtering in combination with IMU acceleration and angular velocity data; a direction scattering factor DSF and a gait stability factor GSI are introduced, a GNSS signal environment and a user motion state are dynamically evaluated, an observation noise covariance matrix is adjusted, and weight adaptive optimization is realized; a positioning credibility score is calculated according to the DSF and the GSI, positioning state grades are divided, and when the score is lower than a threshold value, an inertial navigation priority mode is triggered or an abnormal alarm is given; the method improves the stability and safety of a positioning system in a complex environment, and has a high engineering application value.

The invention discloses a combined braking method for a vehicle EBS system and a hydraulic retarder, which ensures that a brake shoe is not overheated due to long-time high-strength braking, and the braking stability is improved. The controller uses different degrees of cooperative braking according to the current working condition, the retarder plays an important role in the whole braking, the load of the friction braking system is greatly reduced, and therefore the stability of the braking system is improved. Braking operation is simple, and the driving intensity of a driver is relieved. Only a brake pedal is used for braking operation, additional operation is not needed, a handle is not needed, and manual braking system switching is not needed. The braking intention completely depends on the opening degree and the treading speed of the brake pedal treaded by the driver, and the driving habit is better met.

The invention relates to a brake element carrier body having a metallic main body, wherein a surface of the main body is at least partially, preferably completely, coated with an alloy, the alloy being diffused into the main body in a diffusion zone. This alloy is specified in advantageous embodiments.

The utility model relates to the technical field of brake shoe clamps, and discloses a dumper brake shoe efficient finish machining tool which comprises a bottom plate and a transverse plate, the transverse plate is arranged above the rear end of the bottom plate, the transverse plate is supported above the bottom plate through supporting rods on the two sides of the bottom of the transverse plate, and electric push rods are vertically fixed to the two sides of the surface of the transverse plate. An iron plate arranged below the transverse plate is transversely fixed to the extending end of the electric push rod, a screw hole is formed in the surface of the side edge of the iron plate, a transverse conductive pressing rod is further arranged on the side edge of the iron plate, and a stud is arranged at the tail end of the conductive pressing rod. According to the technical scheme, the iron plate capable of being driven to ascend and descend is arranged above the bottom plate, the two conductive pressing rods are transversely connected and installed on the side edge of the iron plate, the descending height of the iron plate can be controlled after the cambered surface of the brake shoe faces the front end, and the two conductive pressing rods are used for pressing the side surface above the brake shoe. And the purpose of conveniently clamping and locking the brake shoes of different sizes can be achieved, and therefore efficient welding work can be conveniently carried out.

The application provides a half-toothed worm electromechanical brake and method, relates to the brake technical field, and the brake comprises a linear and rotary motion conversion assembly, a piston, a brake caliper, a brake shoe, a half-toothed worm, an output worm gear, a parking drive unit and a service brake unit, the parking drive unit and the half-toothed worm are matched, the service brake unit and the output worm gear are matched, and the half-toothed worm and the output worm gear are matched, so that the integrated configuration design with the service brake and the parking brake quick switching capability is realized, the structure has high integration degree, is stable and reliable in long-term use, has high meshing transmission precision, and the technical problems of the existing electromechanical brake, such as complex structure, poor long-term use stability and poor precision, are solved.

1. The name of the design product: shoe welding fixture (railway welding). 2. The use of the design product: for shoe welding clamping and fixing. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model discloses a novel electronic parking actuator structure, relates to the technical field of vehicle equipment, and can solve the problem that in the prior art, in the working process of an actuator in an existing electronic parking system, the running state of the actuator cannot be presented to a driver in real time, and consequently the driver has cognitive deviation on the actual state of a vehicle. In the working process, after the push rod motor is started, the steel wire rope is pulled through the mechanical action of the push rod motor, and then the steel wire rope effectively transmits the borne pulling force to the brake. After receiving the pulling force, the brake immediately carries out tensioning operation on a wheel brake shoe so as to effectively brake the wheel and ensure the safety of vehicle driving, and the current sensor is used for accurately measuring the current of the motor, so that a driver can intuitively know the real-time working state of the push rod motor, and the driving safety of the vehicle is ensured. Therefore, cognitive errors possibly occurring in the driving process of the driver are avoided, and the driving accuracy and safety are improved.

The utility model discloses a drum-type brake shoe assembly structure with a reinforcing rib assembly, and relates to the technical field of drum-type brake shoes. Comprising an installation base, the installation base is provided with an installation mechanism used for the drum type brake shoe, the installation mechanism comprises the structure that in the braking process, friction between a brake shoe and a brake drum can generate large resistance, the resistance can be transmitted to a brake shoe base and a shoe block, at the moment, a first reinforcing rib is located at the inner side connecting position of the brake shoe base and the shoe block, and therefore the brake shoe base and the brake drum block are connected. The brake shoe base and the brake shoe can effectively disperse and transfer resistance, stress concentration and deformation at the connecting position of the brake shoe base and the brake shoe are prevented, meanwhile, the reinforcing blocks of the triangular structure and the second reinforcing ribs on the edges of the reinforcing blocks further enhance the overall rigidity of the brake shoe base and the brake shoe, and when stressed, the reinforcing blocks and the second reinforcing ribs act jointly, so that the brake shoe base and the brake shoe are more stable. Force is evenly distributed on the whole brake shoe structure, damage caused by too large local stress is avoided, and the structural strength and stability of the brake shoe assembly are enhanced.

The invention belongs to the technical field of rail vehicle engineering, and discloses a simulation calculation method for accurately calculating train dynamic curve passing, which comprises the following steps of: establishing a longitudinal-transverse-vertical interaction heavy haul train-rail three-dimensional coupling dynamics refined model; nonlinear links (such as axle box suspension nonlinearity, center plate contact nonlinearity, wedge friction nonlinearity, coupler gap impact effect and dry friction nonlinearity, buffer nonlinear hysteresis impedance and the like) of locomotive suspension and the multi-parameter continuous change characteristic of a curve track are fully considered. If the coupler is used as an independent rigid part for modeling, analyzing the actual coupling and vibration characteristics of the coupler; in combination with the gas flow theory, an air braking model is further improved, and the influence of a train marshalling form on braking wave distribution and braking wave transmission, the influence of distribution of braking force and brake shoe pressure in the braking process on the vehicle wheel-rail power effect and the like can be considered.

The invention provides an elevator brake failure early warning device, and relates to the technical field of elevators. According to the failure early warning device for the elevator brake, the temperature sensing assembly, the vibration sensing assembly, the torque sensing assembly, the air gap sensing assembly and the pressure sensing assembly are arranged through the sensor module, so that a plurality of key parameters such as the temperature of a brake shoe, a vibration signal, a brake torque, a brake air gap and hydraulic pressure or spring pressure can be collected in real time; the comprehensive monitoring of the working state of the elevator brake is realized; the data processing and analysis module applies a multi-dimensional data analysis technology, combines various failure judgment algorithms such as a simple algorithm based on threshold judgment, an intelligent algorithm based on pattern recognition and a prediction algorithm based on machine learning, and a data analysis model comprising a feature layer, a prediction layer and a decision layer; and the collected data can be deeply analyzed and processed, whether the brake has a failure risk or not is comprehensively judged, and the accuracy and reliability of early warning are greatly improved.

The invention provides a subway train brake shoe thickness state abnormity identification method based on deep learning, and the method employs an RGBD camera to collect brake shoe image data, combines a semantic segmentation technology, precisely identifies the thickness of the thinnest part of a brake shoe, and judges whether the thickness accords with a standard range or not. Firstly, in order to improve the quality of an acquired image, multi-frame RGBD information is acquired from a brake shoe and fused; and sending the processed RGBD image into a brake shoe semantic segmentation network to obtain a segmentation mask of the brake shoe. Then, the circle center of the wheel is found through Hough transform, rays are radiated outwards based on the circle center of the wheel, and the line segment length of the rays in the segmentation mask is the thickness of the brake shoe at the position. The minimum value of the length set is the pixel distance of the thickness of the thinnest part of the brake shoe, and the actual physical thickness of the thickness of the thinnest part of the brake shoe can be calculated through the pixel coordinates and depth information of the two ends of the line segment. The inspection task can be automatically executed according to set requirements, and the stability and reliability of detection are improved.

The utility model provides a fault self-checking elevator band-type brake safety device. The fault self-checking elevator band-type brake safety device comprises a base, wherein a detection assembly is arranged at the top of the base; the detection assembly comprises a fixing block arranged on the top of the base, and two brake arms are rotatably arranged on the front face of the fixing block. According to the fault self-inspection elevator band-type brake safety device, when a brake shoe is abraded much to enable the return stroke line spacing of a compression spring to be increased, the right end of a second connecting rod can move more rightwards compared with normal conditions, then a sliding block slides to the position below a power connection groove, and under the action of an ejection spring, the sliding block can move more rightwards to the position below the power connection groove. According to the brake shoe self-checking device, the structure is simple and practical, self-checking of the brake shoe is achieved within the interval time of maintenance of a maintenance worker, and the problem that potential safety hazards exist in a brake device is solved.

The invention relates to a rail vehicle brake, in particular for freight wagons, comprising a monitoring device and to a method for monitoring a rail vehicle brake. A rail vehicle brake (1), in particular for freight wagons, has a brake lever (1a) comprising a brake shoe (5), a brake cylinder (3), a lever adjuster (4) and a monitoring device (10). The monitoring device (10) has a detection unit (7, 7a, 7b, 7c, 7d, 8, 9) comprising corresponding sensors (71, 72, 73, 74, 75, 77, 81, 82, 90) which are formed by access to an electrical energy supply network of a rail vehicle to be equipped with the supply of electrical energy. A rail vehicle and a method for monitoring a rail vehicle brake (1) are provided.

The utility model discloses a brake shoe brake pad structure of a low-noise disc type brake shoe assembly, which relates to the technical field of brake pads, and comprises a brake shoe body, a brake pad main body is arranged on one side of the brake shoe body, and a mounting mechanism is arranged between the brake shoe body and the brake pad main body. The shock absorption assembly comprises a rubber shock absorption pad installed on one side of the brake pad body through the vulcanization technology, through elastic deformation of the rubber shock absorption pad, when the brake pad body rubs against a brake disc to generate vibration, vibration energy can be effectively absorbed, meanwhile, a ceramic fiber pad has high flexibility and excellent damping characteristics, and the service life of the brake pad is prolonged. In addition, the heat dissipation copper net is of a honeycomb structure, part of noise generated by friction can be absorbed while heat dissipation is conducted, vibration and noise in the braking process are greatly reduced through mutual cooperation of the heat dissipation copper net, the rubber shock pad and the heat dissipation copper net, and the comfort and the mute performance of a braking system are remarkably improved.

The utility model discloses a clearance self-adjusting drum-type forklift brake which comprises a brake drum, a brake shoe is installed at the front end of the brake drum, a brake wheel cylinder is installed at the upper position of the front end of the brake shoe, a sleeve is connected to the outer wall of a return spring in a sleeved mode, and the outer wall of the return spring is sleeved with a brake wheel cylinder. According to the device, a sleeve is connected to the outer wall of a return spring in a sleeving mode, when the return spring is stretched, the sleeve can rotate with a gear shaft rod as a circle center shaft, the gear shaft rod rotates in a gear groove, the gear shaft rod can rotate in the gear groove, and therefore the brake shoe can rotate in the gear groove; and meanwhile, the stretching of the return spring enables the upper supporting seat to generate displacement, the upper supporting seat moves along the connecting column, and the movement of the connecting column enables the pushing plate to extrude the stainless steel spring, so that the displacement amplitude of the return spring can be limited when the brake shoe is subjected to applied force, and the phenomenon that the return spring falls off is prevented.

The invention provides a positioning tool for a brake shoe hanging seat and a fixed hanging rod seat of a rail car framework. The positioning tool comprises a tool platform; the two supporting assemblies are arranged on the two sides of the top of the tool platform correspondingly. According to the positioning tool for the brake shoe hanging seat and the fixed hanging rod seat of the rail car framework, the tool platform, the two supporting assemblies, the four positioning seats, the pin shafts and other structures are matched with one another, when a rail car framework component is positioned, the tool platform provides a unified reference, the supporting assemblies stably support the positioning seats, and the reference does not need to be manually and repeatedly calibrated; a component is placed on the positioning seat, and the pin shaft is inserted into the shaft hole to quickly position without manual lineation measurement; the four positioning seats are synchronously positioned, so that the coaxiality and the mounting precision of parts are guaranteed, and the problem that the size is out of tolerance is avoided, thereby solving the problems of inconsistent traditional positioning reference, low precision and complicated operation, simplifying the assembly process, reducing the reworking risk and improving the stability and the safety of the assembly of the rail car brake system.

The present invention relates to an electric, self-adjusting park brake assembly for locking a wheel hub of a stationary towed vehicle in a substantially motionless state. The park brake assembly includes a brake drum configured to rotate correspondingly with the wheel hub, and one or more brake shoes located internally or externally of the brake drum and configured to be operated such that the minimum pressing force required to engage and thereby lock the brake drum is consistently applied by the brake shoe(s) irrespective of the wear rate of the brake shoe(s). A radial pressing force is applied on a surface of the drum by moving the shoe(s) radially until they frictionally engage the surface to an extent that substantially prevents rotation of the wheel hub. The assembly further includes one or more electric motors configured to activate the brake shoe(s), and a switch electrically connected to the electric motor(s).

The invention discloses a method for predicting the temperature of an unsteady-state tread brake wheel shoe on a long and large ramp of a railway wagon. The method comprises the following steps: constructing a transient heat transfer finite element model of the wheel shoe; writing a train speed and thermal boundary condition calculation subprogram based on an electric-pneumatic hybrid braking model of the freight train, and integrating the subprogram into a finite element model to realize coupling of train speed calculation and wheel tile transient heat transfer calculation; temperature monitoring points are arranged on wheels and brake shoes respectively, temperature signals are transmitted to the subprograms, and a wheel shoe temperature monitoring module is constructed; the judgment results of the train speed and the wheel tile temperature are associated with tread braking and electric braking parameters through subprograms, and a train braking control module based on feedback control is constructed; inputting train marshalling, brake control, line information and environment information parameters, and calculating temperatures of wheels and brake shoes; according to the method, the problems of wheel tile temperature checking and braking strategy design of freight train long and large ramp tread braking are solved.

A vehicle electronic system including a parking brake equipment, comprising a brake element (2) including either a brake pad or a brake shoe, said brake element (2) including an electrical circuit equipped with one or more sensors (3, 4, 5) for real-time detection of signals relating to temperatures and / or to normal forces and / or to shear forces and having electrical terminals arranged in a zone for collecting the signals from the brake element, said vehicle electronic parking brake system further comprising an actuator (8) of the brake element (2), a controller (7) delivering a braking force command to the actuator (8), and regulating means (9, 10) driving the controller (7), wherein the regulating means (9, 10) include a closed regulating loop of the braking force including a reference braking force generator (10), said closed regulating loop of the braking force being communicating with said sensors (3, 4, 5) to acquire at least one of temperatures and / or normal forces and / or shear forces measurements.

The problem that this invention aims to solve is to provide an emergency braking device that can maintain braking force over a long period of time. [Solution] The emergency stop device of the embodiment comprises a pair of outer wedges and a pair of inner wedges. The outer wedges are arranged on either side of the central axis, and the surface facing the central axis is an inclined surface that approaches the central axis upward. The inner wedges are arranged on either side of the central axis and have inclined surfaces that approach the central axis upward, with at least a portion of them located between the outer wedges and the central axis. At least a portion of the inclined surfaces of the outer wedges and at least a portion of the inclined surfaces of the inner wedges face each other. The inner wedges are provided with a brake shoe plate on the side facing the central axis, and the brake shoe plate is provided with a brake shoe and a dust removal member on the surface facing the central axis. The dust removal member is located below the brake shoe plate.

The present application discloses a brake shoe roller retainer preparation process, which relates to the brake shoe technical field. The present application uses a brake shoe roller retainer stamping device, which includes: a workbench; a mounting frame. The present application adopts a coordinated design of a model block, a fixing mechanism, a guide groove, and a pushing mechanism, which can move the semi-finished material formed by stamping to a receiving groove. Compared with the prior art, the scraps connected together are not easy to interfere with the movement of the semi-finished material. Subsequently, the semi-finished material in the receiving groove can be folded into a finished product through the coordinated design of the receiving groove, the slide groove, the slider, the stop block, the splint and the transmission mechanism. In the present application, the two ends of the semi-finished material are abutted by the splint and the stop block, so that the verticality of the material after bending is better, the contact area with the roller after installation is smaller, and its service life is longer. In the present application, the folding process and the stamping process are carried out simultaneously, the device has good linkage, which liberates labor and can effectively improve the production efficiency of finished products.

The invention provides a unit braking system. The unit braking system comprises a rotating shaft; the brake disc is fixedly mounted on the rotating shaft; the brake comprises at least one brake plate, and the brake plate is configured to make contact with the brake disc so as to limit rotation movement of the brake disc along with the rotating shaft; the rotating shaft is arranged in the vertical direction, and the brake disc is located at the upper end of the rotating shaft in the vertical direction. The brake maintenance and replacement difficulty can be reduced on the first aspect, meanwhile, a safety hole for maintaining and replacing the brake does not need to be designed in high-strength concrete on the second aspect, and therefore the overall strength of a high-strength concrete building cannot be damaged; and finally, the cost of the high-strength concrete building can be reduced while the structural strength of the high-strength concrete building is ensured.