21results about How to "Accurate braking" patented technology

The invention provides a centrifugal block throwing-out device in operation of a speed limiter, and belongs to the technical field of speed limiters, the centrifugal block throwing-out device comprises a base and a bottom plate, the bottom plate is connected with a limiting rod and a fixing shaft, a rope wheel is arranged in the bottom plate, the side wall of the rope wheel is fixedly connected with an extension plate, and the centrifugal block throwing-out device further comprises a brake assembly used for locking the rope wheel; the centrifugal triggering assembly completes braking of the rope wheel through centrifugal force; the manual triggering assembly is used for completing braking of the rope wheel through external limiting; the beneficial effects of the invention are that external force is applied to the driving lever to drive the blocking wheel to move towards one side of the connecting rod, then the centrifugal block is triggered through interaction force to complete work, so that manual inspection is completed, the structure is simple, the application range is improved, the device can be carried about, and the device can be conveniently operated under the condition that the device does not actually run at an overspeed. The trigger function of the speed governor is verified, and the safety and convenience of maintenance work are improved.

A cable transverse shaft is clamped in arc-shaped clamping grooves in the upper surfaces of a left cable shaft frame and a right cable shaft frame, the middle of the cable transverse shaft is sleeved with a cable drum, fixers are installed on the two sides of the cable drum, the two ends of the cable transverse shaft extend out of the left cable shaft frame and the right cable shaft frame, and the ends of the cable transverse shaft are sleeved with brake pads; the brake pad is longitudinally connected with the brake rod adjuster. In the construction process, cable conveying is stopped, the conveyor and the controller are matched at the same time, the conveyor stops cable conveying, the controller pulls the brake pull rod to drive the brake rod adjuster to control the brake pad to act, the cable transverse shaft stops rotating, the cable coil stops rolling, and the overall braking effect is achieved; the personal safety of constructors is greatly improved, and the construction efficiency is better improved.

The application discloses an AMT intermediate shaft brake control method. When the clutch is separated and the gear shifting is completed, the estimated gear-in speed difference at a certain set time after the current time is calculated after a period of time, and the current time is determined to be open brake valve for intermediate shaft brake or close brake valve for gear shifting according to the estimated gear-in speed difference. The application compares the estimated gear-in speed difference at the set time with the set speed threshold, opens or closes the valve in advance at the set time after the comparison, ensures that the valve action corresponds to the system response time, controls the continuous reduction of the speed, realizes the accurate brake, and avoids the problems of impact and tooth collision.

According to the electronic brake device based on the harmonic reducer, a pressure sensor is installed on a brake seat, the brake force can be detected and controlled through the pressure sensor, meanwhile, gaps caused by abrasion of a brake pad and a brake disc are automatically compensated by controlling the brake force, and effective braking and accurate braking are ensured. In addition, a piston cylinder is installed between the pressure sensor and the screw, a piston shaft is used for being assembled with the pressure sensor and the screw, a piston is fixedly arranged on the portion, located in the piston cylinder, of the piston shaft in a sleeved mode, the portion, located in the piston cylinder and close to the screw, of the piston cylinder is further communicated with a main air pipe, and the main air pipe is connected into an energy accumulator. The energy accumulator controls connection and disconnection of the energy storage cavity and the main air pipe through the inhaul cable, and the inhaul cable can be led into a cab so as to facilitate operation of a driver. Meanwhile, the thread sleeve is driven by the motor, the motor can drive the thread sleeve to rotate during normal use, and the brake pad is driven by the screw to move relative to the brake disc so as to realize braking and release braking.

The utility model relates to the technical field of crane cranes, and discloses a crane crane with a bottom protection device, which comprises a cantilever, chutes are arranged on the outer walls of two ends of the cantilever, a movable frame is arranged at the bottom of the cantilever, two groups of pulleys distributed at equal intervals are movably connected to two ends of the inner wall of the movable frame, and the bottoms of the pulleys are in sliding fit with the bottoms of the inner walls of the chutes. A brake box is fixedly connected to the outer wall of one end of the movable frame, a forward and reverse motor is fixedly connected to the top of the inner wall of the brake box, a rotating shaft at the bottom of the forward and reverse motor is fixedly connected with a lead screw, and a connecting shaft at the bottom of the lead screw is movably connected to the bottom of the inner wall of the brake box. The problem that braking is delayed or excessive in the prior art is solved, the operation safety is remarkably improved, meanwhile, the moving frame moves on the cantilever more smoothly and flexibly, the device adapts to the complex operation environment, the safety of equipment and personnel is guaranteed in an all-around mode, the service life of the equipment is prolonged, and the practical value is high.

The utility model discloses an adjusting screw and a handle, relates to the technical field of brake handles, and aims to solve the technical problems that the installation operation of a current brake cable is tedious, and the adjustment of the brake cable consumes time, the adjusting screw comprises an adjusting mechanism, the adjusting mechanism comprises a threaded pipe and a limiting ring, the outer surface of the threaded pipe is provided with threads, and the limiting ring is arranged on the threaded pipe. A rotating pipe is integrally formed at the tail end of the threaded pipe, a first wire inlet notch is formed in the outer surface of the threaded pipe in the long axis direction, a second wire inlet notch is formed in the rotating pipe in the long axis direction, the first wire inlet notch communicates with the second wire inlet notch, and the limiting ring is installed on the outer surface of the threaded pipe in a threaded mode. The limiting ring is provided with a third wire inlet gap, and the width of the third wire inlet gap is consistent with the width of the first wire inlet gap. The electric bicycle has the advantages that installation steps can be simplified, installation and adjustment time is shortened, hand fatigue of a rider is relieved through the power assisting structure, and comfort and safety are improved.

The utility model discloses a rotary driving type transmission pin which comprises a transmission pin body, an adapter assembly is arranged on the transmission pin body in a sleeved mode, a limiting assembly is arranged at the end, provided with the adapter assembly, of the transmission pin body, the adapter assembly is rotationally connected with the transmission pin body, and the limiting assembly limits the axial position of the adapter assembly on the transmission pin body. The switching assembly is prevented from falling off from the transmission pin body, the switching assembly is clamped on the chuck, and the switching assembly is driven by the transmission pin body to rotate and rotates in the chuck at the same time; the transmission pin is arranged to be the rotatable transmission pin, the switching assembly rotates on the transmission pin body, the chuck can make rotary contact with the transmission pin, the acting force is greatly reduced, abrasion is not likely to happen, the service cycle is long, cost is greatly saved, precise braking and driving can be conducted, the sizing material curling process is stable, and the service life is long. The quality and the yield of rubber products are greatly improved, the operation is stable, and the production requirements are met.

This utility model discloses a precast power wall end mold with a walking mechanism, relating to the field of precast power wall technology. It includes a mold body, a first mold support welded to the bottom of the mold body, an inclined support welded to the side of the mold body opposite to the casting side, a first roller and a second roller mounted on the first mold support, an independent roller mounted on the inclined support, and a braking device for braking the first roller. The lowest points of the wheel surfaces of the first roller and the independent roller are at the same height, used for rolling support on the top plane of the upper horizontal section of an I-beam track. The second roller is a conical wheel located below the first roller, used for rolling against the bottom inclined surface of the upper horizontal section of the I-beam track. When used as the end mold of a precast power wall casting equipment, this utility model's precast power wall end mold achieves more stable movement and excellent controllability.

The invention belongs to the technical field of multi-leaf collimators, and particularly relates to a multi-leaf collimator blade driving method and a driving structure. The driving structure comprises a constant-torque fixed-rotating-speed motor, a plurality of transmission subsystems and a plurality of blades; the plurality of transmission subsystems are in one-to-one correspondence with the plurality of blades of the collimator; a single constant-torque fixed-rotating-speed motor is used as a power source, power is transmitted to collimator blades through transmission subsystems in one-to-one correspondence with a plurality of blades of the collimator, and the collimator blades are driven to complete linear motion; the power input ends of the transmission subsystems are connected in parallel. The driving blades only need a single high-power motor and are greatly different from a traditional multi-blade collimator, and the number of the blades of the traditional multi-blade collimator is the same as that of the motors for driving the blades. According to the driving structure, the moment of motion of the blades can be increased in a larger range, the motion speed is higher, the requirement for the size of the motor is greatly lowered, the requirement for the performance of the motor is lowered, and a large power change range is not needed.

A novel pneumatic winch dual-control safety operation method includes a first hand-operated valve, a first pneumatic control valve, a second pneumatic control valve, a third pneumatic control valve, a fourth pneumatic control valve, a first one-way valve, a one-way throttle valve, and a quick-release valve. The control air circuit of the personnel-carrying pneumatic winch described in this invention includes a basic control air circuit and a safety protection air circuit. The safety protection air circuit mainly includes an emergency stop protection air circuit, a travel limit protection air circuit, a slack rope protection air circuit, an overload protection air circuit, an air cut-off braking protection air circuit, and an emergency release protection air circuit. When the above safety protection air circuits are activated, they can all ensure that the winch stops and brakes quickly, with high reliability, maximizing the safety of people and property on the pneumatic winch. It is simple to operate, precise to control, reliable to run, energy-saving and environmentally friendly.

The embodiment of the invention is suitable for the technical field of vehicles, and provides a vehicle braking method and device, vehicle-mounted equipment and a medium, the method comprises the steps that the lane line state of a current driving road of a vehicle is determined, and the lane line state comprises a clear state or a non-clear state; if the lane line state is a non-clear state, predicting a driving track of the vehicle; determining a target obstacle having a collision risk with the vehicle according to the driving track; and braking the vehicle based on the target obstacle. Through the method, the vehicle can be accurately and emergently braked under the condition that the lane line is not clear.

The invention provides an electric wheel edge brake for a crane, and relates to the field of brakes. The brake arm is movably arranged on the base; the braking assembly is connected to the braking arm, and when the braking arm moves relative to the base, the braking assembly can be driven to make contact with the walking wheels so as to achieve braking; the driving reset mechanism is connected to the brake arm and used for driving the brake arm to rotate relative to the base so that the brake assembly can make contact with or be separated from the walking wheel. Wherein the brake assembly comprises a movable part, a fixed part and a locking piece, and the movable part is movably connected to the fixed part; the locking piece is used for locking the movable part and the fixed part; and when the locking piece is triggered, the movable part and the fixed part are separated from locking, so that the movable part can move towards the side of the walking wheel. Compared with the prior art, the method has the advantages that the braking efficiency of the crane is improved, and equipment damage or operation risk caused by over-emergency braking is avoided through gradual speed reduction.

This invention discloses a magnetic levitation circular conveying device and method, comprising: a mounting base, a controller, a circular magnetic levitation stator rail, a material conveying mechanism, a braking mechanism, a fixing frame, a linear motion module, and a vision recognition module; the controller is disposed on the front side of the mounting base; the circular magnetic levitation stator rail is mounted on the top of the mounting base; several material conveying mechanisms are spaced apart on the inner side of the circular magnetic levitation stator rail; the braking mechanism is disposed below the circular magnetic levitation stator rail; the fixing frame is mounted on the rear side of the mounting base; and the linear motion module is disposed on the top left side of the fixing frame along the front-rear direction. This magnetic levitation circular conveying device and method can achieve rapid braking during high-speed magnetic levitation circular conveying, shortening the braking distance, and can achieve precise braking during the conveying of heavier materials, making the material movement position more accurate.

The present invention is a hydraulic control valve block, a hydraulic control system and a hydraulic device. The hydraulic control valve block includes a control circuit and a brake circuit. The control circuit is connected between a hydraulic source and a hydraulic cylinder. The brake circuit includes a first electromagnetic reversing valve, a synchronous motor and a first hydraulically controlled one-way valve. The first main oil inlet of the first electromagnetic reversing valve is connected to the first oil pipeline of the control circuit. The first main oil return port of the first electromagnetic reversing valve is connected to the hydraulic source. The first working oil port of the first electromagnetic reversing valve is connected to the first flow outlet of the synchronous motor. The second working oil port of the first electromagnetic reversing valve is respectively connected to the first pilot port of the first hydraulically controlled one-way valve and the first flow inlet of the synchronous motor. The second flow inlet of the synchronous motor is connected to the first oil inlet of the first hydraulically controlled one-way valve. The first oil outlet of the first hydraulically controlled one-way valve is connected to the hydraulic cylinder. The second flow outlet of the synchronous motor is connected to the hydraulic source. The present invention solves the technical problems that the brake device is easily damaged and the braking is not timely.

The ropeway rescue pulley comprises a main body square tube, an upper tube is installed on the outer side of the main body square tube through an upper tube shaft, the two ends of the main body square tube are slidably hoisted to the top of a rope through dragging cross rods, a brake assembly is installed on one side of the main body square tube, and safety rings are further installed at the positions, located at the bottoms of the dragging cross rods, of the two ends of the main body square tube. A passenger sits on the seat, the pulley slides along the rope, and when the passenger gets close to a target or wants to decelerate and stop, the brake handle is wrenched, the brake plate is adjusted to rise to press the rope through the brake connecting rod a, the brake connecting rod b and the brake connecting rod c, so that the brake plate rubs with the rope, the pulley is controlled to decelerate, and the purpose of decelerating or stopping is achieved through direct braking. When not used, the brake handle is loosened, the reset spring rod resets and loosens the brake due to the elastic force of the spring, and the situation that the service life of the rope is affected due to friction between the brake pad and the rope when the rope is not used is avoided.

The present application relates to the field of urban rail train control technology, and specifically to a parking control method, control device and system for an urban rail train, the control method comprising: determining the speed consistency coefficient of each carriage at the current moment based on the difference in speed data between each carriage and all other carriages at the current moment, and the difference in all historical speed data of each carriage between the current moment and its adjacent previous acquisition moment, and determining the data reliability coefficient of each carriage at the current moment in combination with the speed accuracy coefficient and the speed regularity coefficient, and performing parking control on the urban rail train in combination with the speed data of all carriages at the current moment and the actual position of the urban rail train. The present application comprehensively analyzes the differences in speed data in different carriages and at different times to improve the accuracy of parking control of urban rail trains.

The utility model provides a positioner special for three-axis grinding, which belongs to the technical field of material grinding and comprises a base, a positioning mechanism, a positioning mechanism and a positioning mechanism. The transmission wheel is rotationally arranged on the upper surface of the base, a rotating disc is fixedly arranged on the transmission wheel, and the rotating disc indirectly provides support for the cross beam; the driving gear is rotationally arranged on the base, and a gear ring corresponding to the driving gear is further arranged on the outer surface of the transmission wheel; the limiting groove is annularly formed in the bottom face of the rotating disc and located on the same axis with the rotating disc, and the inner diameter of the limiting groove is larger than the outer diameter of the gear ring; the dustproof cover is of a hollow tubular structure and is fixed to the upper surface of the base, and the top of the dustproof cover is located in the limiting groove; the dustproof box extends from the side wall of the dustproof cover, is of a box structure, is fixed to the upper surface of the base and is located outside the driving gear; the driving wheel and the rotating structure on the base can be protected through the dustproof cover and the dustproof box, so that the service life of the positioner is effectively prolonged, and the maintenance frequency of the positioner is reduced.

The radial plunger type hydraulic motor comprises a brake disc and a force application assembly which is arranged in a brake cavity and applies force to the brake disc, and the force application assembly comprises a brake piston, an elastic piece and a thickness-selectable pad increasing piece. The elastic piece is arranged between the brake piston and the cavity wall of the brake cavity in the axial direction; the pad increasing piece is arranged at at least one end of the two axial ends of the elastic piece so that the elastic piece can abut against the brake piston and / or the cavity wall through the pad increasing piece. At least one of the two axial ends of the elastic piece is provided with the pad increasing piece, so that when the radial plunger type hydraulic motor is assembled, the initial compression amount of the elastic piece is confirmed according to the braking force required by braking of the radial plunger type hydraulic motor, the accurate initial compression amount of the elastic piece can be ensured by arranging the pad increasing piece, and the axial size of the pad increasing piece is adjusted; therefore, the axial error of the radial plunger type hydraulic motor before the elastic piece is installed is made up, and when the radial plunger type hydraulic motor is braked, the braking effect is improved, and accurate braking is achieved.

The present invention provides a brake-by-wire system for an unmanned vehicle and a control method thereof, belonging to the technical field of brake-by-wire technology. The system comprises a strategy formulation module, a pressure adjustment module, an environment adjustment module and a control module. An ECU formulates a strategy according to braking requirements, adjusts the strategy through a pressure sensor and an accumulator, and further adjusts the strategy in combination with environmental data to form and implement a final braking strategy, so that the unmanned vehicle can achieve precise braking in different environments, improve safety, enhance adaptability, and optimize braking performance.

The invention discloses a hardware-in-the-loop test system and method for a millimeter wave radar, and the system comprises a first upper computer, a second upper computer, a video camera obscura, a hardware-in-the-loop test cabinet, a radar echo simulator system, and a controller. The hardware-in-the-loop test cabinet is respectively connected with the first upper computer, the second upper computer, the radar echo simulator system and the controller, the video camera obscura is connected with the first upper computer, and the radar echo simulator system is respectively connected with the second upper computer and the controller. The hardware-in-the-loop test system of the millimeter-wave radar is used for acquiring a test scene, identifying the test scene, obtaining scene information, operating automatic test software to obtain radar sensing data, performing logic processing on the radar sensing data, obtaining processed radar sensing data, converting the processed radar sensing data, obtaining echo data, and transmitting the echo data to a server. And performing sensing fusion on the scene information and the echo data to obtain target data so as to complete a hardware-in-the-loop test process of the millimeter wave radar.

This invention discloses a dual electromechanical braking device and its control method for automotive braking. The braking device includes a drive motor, an external gear ring, a reduction and torque amplification device, an electromagnetic power supply, an electromagnet A, a permanent magnet A, a first braking execution module, a second braking execution module, a first clamping mechanism, a second clamping mechanism, a first friction pad, a second friction pad, a brake disc, a bearing, a parking device, a displacement detection device, and a brake wear detection device. This invention uses two sets of braking devices to apply double braking to the brake disc, resulting in shorter braking time, better braking effect, and effectively improved safety performance. This invention also provides a control method for the braking process, including control methods for normal mode, emergency braking mode, and parking mode. During braking, if the braking device fails due to power failure, the detection device will promptly issue a safety alarm to the driver and immediately activate the other braking device for emergency braking, achieving backup braking.