157results about How to "Achieve emergency braking" patented technology

The invention relates to a pedal decoupling type electro-hydraulic composite braking system for integrated pedal displacement measurement. The pedal decoupling type electro-hydraulic composite braking system for the integrated pedal displacement measurement comprises a hydraulic braking subsystem and a motor regenerative braking subsystem, wherein an integrated type braking master cylinder assembly of the hydraulic braking subsystem is composed of an integrated type braking master cylinder and a high-pressure oil source. The integrated type braking master cylinder integrates a braking master cylinder pressure generation function, a pedal feeling imitation function and a positive and passive hydraulic assistance function. A high-pressure oil outlet of the high-pressure oil source is connected with the integrated type braking master cylinder, and provides stable and continuous braking energy for the braking process. A pressure sensor is installed on the integrated type braking master cylinder to achieve measurement of displacement of a braking pedal, and decoupling of the braking pedal is achieved. The pedal decoupling type electro-hydraulic composite braking system for the integrated pedal displacement measurement is compact in structure, easy to implement and high in integration degree, improves feeling of the braking pedal of a vehicle, has a positive hydraulic assistance function in a normal braking condition, has a passive hydraulic assistance function in an ineffective condition, effectively ensures braking safety of the vehicle, can be applied to a traditional vehicle line control braking system, and can be widely applicable to all-electric cars, hybrid electric cars and fuel cell cars.

The invention relates to a vehicle throttle anti-misstep brake device. The device comprises a brake pedal, a throttle pedal and a centrifugal clutch; the centrifugal clutch comprises an inner ring and an outer ring, two movable claws are arranged on the inner ring, the movable claws can rotate around pivots, fixed on the inner ring, of the movable claws; the tail end of each movable claw is provided with a limit stop, the middle part of each movable claw is connected with one end of a tensioning spring; and the other end of the tensioning spring is fixed on the inner ring; tooth sockets matched with the claw tips of the movable claws are arranged on the outer ring; the throttle pedal is connected with the inner ring through a first connecting rod; and a throttle pull wire is wound on the inner ring; the brake pedal is connected with the outer ring through a second connecting rod; and the outer ring is connected with a brake cylinder trough a brake pull wire. The vehicle throttle anti-misstep brake device can be used for preventing a driver from stepping the throttle mistakenly when braking and further causing accidents.

The invention relates to an electric-traction rack rail railcar. By successfully developing the electric-traction rack rail railcar, the contradiction between the rapid development of coal mining, shoring and heading equipment and underdeveloped underground coal mine subsidiary transportation equipment in China is alleviated, and the updating and upgrading of coal mine equipment in China are maximally promoted. The electric-traction rack rail railcar comprises rails and standers, wherein a cab, an anti-explosion diesel generator, an anti-explosion variable frequency motor, a three-stage gear reducer, an electric control tank, and a guiding and anti-rollover steering frame are arranged on the standers. The electric-traction rack rail railcar has the beneficial effects that the whole vehicle is electrically and mechanically driven and is powered by the vehicle-mounted anti-explosion diesel generator, and a low-speed large-torque driving manner can be realized by virtue of the anti-explosion variable frequency motor and the three-stage gear reducer; by utilizing the anti-explosion variable frequency motor, the emergency braking, the driving braking, parking braking and the like of the railcar are realized by virtue of the coordinate operation of a variable-frequency governor and a braking system; the guiding and anti-rollover steering frame with a guiding wheel can play guiding and anti-rollover roles; the electric-traction rack rail railcar is environment-friendly, safe and efficient and has an automatic function.

A dual-redundancy telescope tracking device for an astronomical telescope comprises a pitch axis set and an azimuth axis set and is characterized in that two sets of tracking systems are respectively adopted for the pitch axis set and the azimuth axis set, and then an azimuth axis dual-redundancy axis set and a height axis dual-redundancy axis set are respectively formed; the two sets of tracking systems are automatically switched through a control system; the two sets of tracking systems in the pitch axis set jointly drive a height axis and share a set of feedback systems and a set of height limiting and braking systems; the two sets of tracking systems in the azimuth axis set jointly drive an azimuth axis and share a set of feedback systems and a set of azimuth limiting and braking systems. The dual-redundancy telescope tracking device has the advantages that bearing capacity is high, friction force is low, power consumption is small, transmission efficiency is high, and rotation accuracy is high; positioning accuracy can reach 20 degrees per second at high speed and reach 0.05'' per second at low speed, and no creeping phenomenon exists; emergency braking and mechanical shock protection can be achieved at the same time through braking and limiting, and the rotation range can be adjusted within the range from 0 degree to 360 degrees in the forward direction and in the reverse direction. The dual-redundancy telescope tracking device can be also used for other heavy high-precision rotating equipment.

The invention discloses a micro-motion function and hydraulic brake control system of a wheeled dozer, and belongs to the field of wheeled dozers. The micro-motion function and hydraulic brake control system comprises an oil tank, an oil suction filter, a gear pump, a high-pressure filter, a prefilling valve, a micro-motion oil cylinder, a left pedal valve, a pressure switch, a brake valve set, a right pedal valve, a shuttle valve set, a rear axle brake, a front axle brake and a parking brake. Through the left pedal valve (micro-motion function pedal valve), a driver can effectively control tire drive force by combining the condition that the tire drive force ranges from 0 percent to 100 percent, wheel slipping is avoided, tire abrasion is reduced, and therefore engine power can be effectively utilized, oil consumption can be reduced, and circulating speed can be improved. According to the micro-motion function, the tire drive force is effectively controlled, meanwhile, emergency braking can be achieved through a service brake, and the reliability and running safety of a brake system are obviously increased. Main elements of the control system are integrated on the brake valve set, pipe connection is simplified greatly, and pipe arrangement is more reasonable.

The invention relates to a pedal decoupling type and integrated type brake master cylinder assembly for measuring integrated pedal displacement, which is composed of an integrated type brake master cylinder and a high pressure oil source, wherein the integrated brake master cylinder is composed of a brake pedal, a pressure sensor, a pedal sensation simulator and a cut-out magnetic valve, a brake boosting piston, brake master cylinder pistons and reset springs; the high pressure oil outlet of the high pressure oil source is connected with the integrated brake master cylinder, so that stable and continuous brake energy is provided in the brake process. The brake master cylinder assembly has a compact structure, is high in integrated level, improves brake pedal sensation of a vehicle, has the active hydraulic boosting function in the situation of normal brake, has the passive hydraulic boosting function in the failure situation, efficiently ensures the brake safety of the vehicle, can be used for a brake-by-wire system of a conventional vehicle, and can be widely used for a brake system of a battery electric vehicle, a brake system of a hybrid powered vehicle and a fuel cell vehicle electro-hydraulic compound brake system.

The invention relates to an actual-vehicle-simulated vibration test-bed for transmission shafts with different specifications and belongs to the actual-vehicle-simulated vibration test-bed for the transmission shafts with different specifications. A first rack and a second rack are fixed on the foundation of a test room side by side, the second rack is located at the right side of the first rack, a power output system is arranged on the first rack, a vibration excitation device is arranged on the first rack at the right side of a power output device, a safety braking system is arranged above the vibration excitation device, the left end of the safety braking system is connected with the power output system, the right end is fixedly connected with a first right end fixing cover of the first rack, a supporting system is arranged on the second rack, and a loading device is mounted at the tail end of the supporting system. The test-bed has the advantages that the measurement on the vibration of a transmission shaft assembly is realized, and the defect that most of traditional vehicle transmission shaft vibration test-beds cannot sufficiently perform corresponding simulation tests according to different vehicle model parameters and road conditions and cannot quickly adjust angles of the transmission shafts is overcome.

The invention belongs to the technical field of automobile braking systems and discloses an electronic hydraulic braking system with multiple working modes. The electronic hydraulic braking system mainly comprises a braking pedal, a braking pedal displacement sensor, an active control booster, 2 / 2 normally-closed solenoid valves, an active pedal sense simulator, a hydraulic control unit, an electronic control unit, a braking main cylinder and braking wheel cylinders. The electronic hydraulic braking system adopts a double-power source braking system form, so that the fault-tolerant capability of the system can be improved, the relatively steady pedal sense can be guaranteed during the switching of various braking conditions, and furthermore, the relatively high pressurizing response speed of the system can be guaranteed.

The invention relates to an automatic emergency braking method and device and a vehicle, belongs to the field of vehicles, and can provide comfortable driving experience while reducing the accident occurrence probability. The automatic emergency braking method comprises the steps that road condition information of a road section where a vehicle is located currently is obtained; vehicle informationand front target obstacle information of the vehicle are obtained; and deceleration and collision time when automatic emergency braking is executed are determined based on the vehicle information ofthe vehicle, the front target obstacle information and the road condition information.

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

The invention discloses an automobile accelerator mistaken stepping emergency braking device and a braking method thereof. The emergency braking device comprises an accelerator assembly and a brake assembly. The accelerator assembly is composed of an accelerator pedal, a compressible elastic plastic pipe, a sensor collection module and a controller 5. The brake assembly is composed of a brake pedal, a brake motor, a brake line, a brake master cylinder and a brake unit. The stepping speed of the emergency braking device is monitored in real time through the sensor collection module, and once the stepping acceleration is monitored to exceed the threshold value set by the device, the brake motor is controlled by the controller, the acceleration state of pedal stepping is rapidly converted into the emergency braking state, and emergency braking is achieved for an automobile. By means of the technical scheme, the defects of the prior art are overcome, safety and reliability are achieved, serious traffic accidents caused when an accelerator is regarded as a brake under the emergency condition are avoided, accidental injuries are effectively reduced, and personal safety is protected.

The invention relates to elevator brake safety tongs which comprise a base. A first brake block and a second brake block are arranged on the base. A brake groove is formed in the side, away from the second brake block, of the first brake block. A locating cylinder is arranged on the base and provided with a rotatable brake wheel. The brake wheel comprises a cam and an eccentric round wheel which are arranged up and down and are fixedly connected. The outer edge of the eccentric round wheel and the brake groove are matched so as to drive the first brake block to move towards the second brake block. The base radius of the cam is larger than or equal to the radius of the eccentric round wheel, and the cam can penetrate the first brake block to abut against and press an elevator guide rail. According to the elevator brake safety tongs, brake drive is achieved through dynamical friction between the cam and the elevator guide rail till the first brake block and the second brake block clamp the elevator guide rail when the brake wheel stops rotation; and by means of the structure, the safety tongs can be effectively prevented from failing, and reliability is high.

The invention discloses an emergency braking and rheostatic braking combined control device for a locomotive brake. The device comprises a logic circuit used for automatically cutting off locomotive traction and rheostatic braking after emergency braking, a logic circuit used for re-performing rheostatic braking after emergency braking and automatic cutoff of rheostatic braking and a logic circuit used for automatically judging whether to cut off intrinsic air braking of the locomotive or not according to rheostatic braking force. Safety reliability of the locomotive in emergency can be improved by the emergency braking and rheostatic braking combined control device. A function of automatic cutoff of locomotive traction and rheostatic braking after emergency braking of the locomotive is realized; a function of reapplying rheostatic braking force according to needs after emergency braking and automatic cutoff of rheostatic braking; wheel locking of the locomotive caused by superposition of rheostatic braking during re-performing of rheostatic braking after emergency braking is prevented; and automatic recovery of intrinsic air braking force of the locomotive can be guaranteed once rheostatic braking fails.

The invention discloses a failure-proof brake-by-wire system and a control method thereof. The failure-proof brake-by-wire system comprises an electronic control unit, a braking unit and a failure-proof unit, wherein the electronic control unit receives a brake pedal signal and a current signal collected by a Hall sensor to control the brake-by-wire and trigger the failure-proof unit, and the braking unit is used for implementing braking force and completing the braking process; the failure-proof unit is a mechanical hydraulic device and composed of a hydraulic pressure block, a friction block, a coil, a hydraulic braking pipeline and a hydraulic cylinder, when the brake-by-wire and electronic control fail, the rapid response is achieved, and reliable braking force is provided to ensure the braking safety; the failure-proof unit is as a standby braking unit of the brake-by-wire system, a hydraulic system is driven by kinetic energy of a vehicle to realize braking, and the braking safety is high; and meanwhile, the failure-proof unit is triggered by a mechanical structure, the response speed is fast, the intermittent braking after triggering is achieved, the braking locking is prevented, and the safety of the emergency braking process is guaranteed.

The invention discloses an anti-falling climbing-assisting device. The device comprises a shell, wherein a rotatable winding drum is arranged in the inner space of the shell, a steel rope is wound around the winding drum, the winding drum is driven by a driving motor to rotate so as to enable the steel rope to do lifting motion along with rotation of the winding drum, an inner wheel coaxially connected with the winding drum in a transmission mode is arranged on the winding drum, a rotatable ratchet pawl is installed on the side surface of the inner wheel in the circumferential direction of theinner wheel, a return tension spring is arranged between the inner wheel and the ratchet pawl, an outer wheel which is coaxial with the inner wheel and arranged outside the inner wheel in a sleevingmode is arranged on the shell, and ratchets cooperating with the ratchet pawl for braking are arranged on the inner side surface of the outer wheel, so that the ratchet pawl can extend outwards to abut against the ratchets for braking under the action of centrifugal force generated by rotation of the inner wheel when the rotating speed of the winding drum reaches a set value.

The invention provides an automobile emergency braking system, an automobile emergency braking method, an automobile emergency braking device and miniature electronic equipment. A brake steering gear is connected with a sensor through the miniature electronic equipment, when the miniature electronic equipment receives a distance value of an accelerator pedal from the sensor, the miniature electronic equipment can work out the current pedaling speed of the accelerator pedal according to the distance value of the accelerator pedal, after it is judged that the current pedaling speed exceeds a preset speed threshold value, the miniature electronic equipment sends a braking instruction to the brake steering gear so that the brake steering gear can control a brake pedal in time to be pressed downwards, and emergency braking of an automobile is realized. It is thus obvious that the current pedaling speed is calculated by using the miniature electronic equipment according to the received distance value and compared with the preset speed threshold value, whether the pedaling speed of the accelerator pedal is accelerated due to stepping on an accelerator by mistake under an emergency condition or not can be judged, the braking instruction can be sent to the brake steering gear in time so that the brake steering gear can control the brake pedal to be quickly pressed downwards to avoid a traffic accident, and personal safety of a driver and others is ensured.

The invention discloses a barbell for integration of safety protection and training in bench press. The barbell comprises a barbell rod, a barbell plate, elevating protecting devices and a bench pressbed. Two sides of the bench press bed are provided with elevating protecting devices. The barbell rod is arranged above the bench press bed, and furthermore two ends of the barbell rod are welded between the two elevating protecting devices. The barbell is advantageous in that when the barbell rod moves next to a chest and a force cannot be applied for lifting the barbell rod; a pressing rod contacts with the chest through gravity of the barbell; hereon a transmission mechanism operates and utilizes an upward pushing force of the transmission member so that moving arms at two sides of a sliding mechanism is downwards opened, thereby realizing contact between a braking block and a double-rail slideway, realizing emergency braking of the barbell, preventing continuous sliding of the barbelland load concentration to the chest, and preventing a server injury of the human body.

The invention relates to the technical field of transportation equipment, in particular to a flat car. A braking system comprises a control rod, a brake pad, a transmission rod, a first connecting rod, a supporting rod and a pedal. The middle section of the control rod is hinged with the support plate; the tail end of the control rod is located below the supporting plate. The brake pad is of an arc-shaped structure, and the tail end of the control rod is connected with the brake pad; the tail end of the control rod is connected with the supporting plate through a spring piece so that the innerside of the brake pad can make contact with the first wheel. A long hole extending in the length direction of the control rod is formed in the tail end of the control rod, the head end of the transmission rod is hinged to the long hole, and the tail end of the transmission rod is hinged to the tail end of the first connecting rod; the supporting rod is fixed to the supporting plate. The middle section of the transmission rod is hinged to the supporting rod. The first connecting rod penetrates through the supporting plate, the head end of the first connecting rod is connected with the head endof the pedal, and the pedal is located at the top of the supporting plate and hinged to the top of the supporting plate. The invention aims to provide the flat car capable of realizing effective braking.

The invention discloses an amphibious ship with automatically retractable wheels, which comprises a hull, a power unit and a steering rudder, the tail of the hull is provided with a power unit, and the power unit includes a motor, a guide shaft, a shield and a propeller. One end of the guide shaft is fixedly connected to the bottom end of the motor, and the other end of the guide shaft passes through the hull and is connected with a guide rudder. The outer side of the propeller is provided with a shield, and the motor and the center of the motor that can rotate forward and reverse The acceleration and emergency braking of the amphibious ship can be realized with the reducer. The coaxial setting of the motor and the guide rudder can realize fast and effective turning in the water. The liquid level sensor can monitor the draft of the ship. When switching between each other, the liquid level sensor converts the corresponding electrical signal into the operation of stretching or putting down the wheel. This invention eliminates the traditional mechanical transmission steering structure and the heavy mechanical structure, and the front wheel is equipped with a braking device. It can ensure the safety of driving on land.

The invention discloses an electronic control device for engineering machinery and a working method. A controller is connected with a parking brake switch, a handle meso-position switch, an accelerator idle switch, a starting switch, a starting relay contact, an engine ECU (electronic control unit) and a flameout switch. The engine ECU is connected with an engine and a starting relay coil, one endof the starting relay contact is connected with the controller, the other end of the starting relay contact is connected with a starter, and the controller is further connected with a brake valve. The emergency flameout switch and a power forced recovery switch are further connected between the controller and the engine ECU, and an emergency brake switch is further arranged to control a power supply of the whole electronic control device. Damage to the engine and a pressurizer caused by improper operation in the starting and flameout process of the engine can be avoided, damage to the starterand a storage battery caused by improper operation in the starting process is avoided, emergency brake of the whole machinery can be realized, emergency flameout of the engine can be realized, poweris recovered in a forced manner under perilous working conditions, and safety and reliability of the whole machinery are greatly improved.

The invention relates to a stamping die with a safety protection function and belongs to the technical field of metal stamping. The stamping die with the safety protection function comprises an upper die holder and a lower die holder arranged oppositely, the upper die holder is provided with a convex die, the lower die holder is provided with a concave die, a concave die groove matched with the convex die is formed in the concave die, the concave die is provided with a press plate used for stamping a press edge of a forming part, a transverse H-shaped upright guide post is fixed on the lower die holder, a square guide sleeve having sliding fit with the upright guide post is arranged on the upper die holder, the lateral surface of a wing plate of the upright guide post is in sliding fit with one pair of opposite internal lateral surfaces of the square guide sleeve, a lining brake connected with an external braking pipeline is arranged on a web at the lower end of the upright guide post, when the square guide sleeve is located at the lining brake at the lower end of the upright guide post, the lining brake extends out to fit with the other pair of opposite lateral surfaces of the square guide sleeve and lock the same. The stamping die with the safety protection function is capable of urgently braking a micro-stamping machine under a dangerous situation so as to protect the personnel security.

The invention relates to a stamping die with a braking function and belongs to the technical field of metal stamping. The stamping die comprises an upper die seat, a lower die seat, a male die, a female die, a vertical guide post and a square guide sleeve, wherein a female die groove is formed in the female die; a press plate is arranged on the female die; the side surfaces of a wing plate of the vertical guide post are in sliding fit with a pair of opposite inner side surfaces of the square guide sleeve; a brake connected with an external brake pipeline is arranged at the lower end of the vertical guide post and comprises a pair of brake shoes arranged oppositely, one ends of the brake shoes are hinged to a web plate of the vertical guide post, and the other ends of the brake shoes are in rolling connection with a driving cam; an inclined plane inclined to the other end of the brake shoe and friction plates arranged on the inclined plane are formed on each brake shoe; when the square guide sleeve is positioned at the brake at the lower end of the vertical guide post, the driving cam drives the brake shoes to rotate and enable the friction plates to be clung to and locked with the other pair of opposite inner side surfaces of the square guide sleeve. The stamping die has the advantage that in case of a danger, a mini-type punch can be emergently braked to protect personnel security.

The invention relates to an electric traction rack rail car. The successful development of the car alleviates the contradiction between the rapid development of coal mining, support and excavation equipment in my country and the backward auxiliary transportation equipment in coal mines. It has promoted the upgrading of my country's coal mine equipment to the greatest extent. The present invention includes a track and a frame. The frame is equipped with a cockpit, an explosion-proof diesel generator, an explosion-proof variable-frequency motor, a three-stage gear reducer, an electric control box, a guiding anti-rollover steering frame, etc. The whole locomotive adopts electric-mechanical transmission. , driven by a vehicle-mounted explosion-proof diesel generator, through an explosion-proof variable-frequency motor and three-stage gear reduction, it can realize low-speed high-torque drive; it uses an explosion-proof variable-frequency motor, and through the coordinated use of variable-frequency speed regulation and braking systems, it can realize emergency braking and braking of locomotives. Driving brake, parking brake, etc.; the guiding and anti-rollover steering frame with guide wheels can play the role of guiding and anti-rollover; the electric traction rack rail car of the present invention is a green, safe, efficient, and automatic function A new type of mining transport vehicle integrated.

The invention discloses a forklift safety protection and intelligent training and examination system. The system comprises a training site, a forklift, a proximity sensor, a signal collector, a remote control, and a principal computer for monitoring. The proximity sensor is arranged within the boundary of the training site. The signal collector and the principal computer for monitoring are connected by means of wireless transmission. The forklift is internally equipped with a PLC, a forklift automatic braking device, a gray scale sensor and a flameout switch, wherein the PLC is arranged at the tail of the forklift, the flameout switch and the forklift automatic braking device are arranged inside the forklift, and the gray scale sensor is fixedly arranged under the forklift. With the system, the driving route information of the forklift can be collected in real time, the driving condition of the forklift can be displayed in real time and analyzed comparatively, the forklift can brake under emergency, and the objectivity of evaluation is promoted.

The invention discloses a driving device for an automobile road test. The driving device comprises a base, upright posts, a moving frame, a steering wheel driving mechanism and a pedal driving mechanism, wherein the pedal driving mechanism is assembled on the base, the pedal driving mechanism is connected with a pedal mechanism of an original automobile, the upright posts are arranged on both sides of the base, the moving frame is penetrated on the upright posts, the steering wheel driving mechanism is arranged on the moving frame, and the steering wheel driving mechanism is connected with a steering wheel of the original automobile. The driving device has the advantages that the transmission efficiency is high, the service life is long, meanwhile, micro feed can be realized, and high precision control of the pedal stroke is realized. In the case of emergency circumstances such as sudden outage of the automatic driving device, an electromagnetic lock on a sliding table loses power, sothat a push rod deviates from the sliding table, an accelerator pedal automatically resets under the action of a tension spring and a compression spring, and a clutch pedal and a brake pedal are automatically pressed to achieve emergency braking.

The invention discloses an emergency brake device of a belt conveyer. The emergency brake device of the belt conveyer comprises a mounting bracket, a fixing mechanism and an emergency brake bar, wherein the mounting bracket is fixed above a conveyer belt at the lower side; the fixing mechanism is arranged on the mounting bracket; the fixing mechanism extends downwards from the mounting bracket; the fixing mechanism has a fixing state and a release state; the emergency brake bar is made of a flexible material; the section is of a wedge shape; the emergency brake bar is provided with a thin end and a thick end; the fixing mechanism clamps the emergency brake bar, so that the thin end of the emergency brake bar contacts the conveyer belt at the lower side when the belt conveyer normally works, but the other part of the emergency brake bar except for the thin end does not contact the conveyer belt at the lower side; and the fixing mechanism releases the emergency brake bar when emergency brake is required, and the emergency brake bar is driven by the conveyer belt at the lower side to be embedded between a drive roller and the conveyer belt at the lower side to brake.

The invention discloses a punching device for shoe production. The punching device comprises a box body; the top of the external of the box body is fixedly connected with a frame type fixed frame; the right side of the frame type fixed frame is fixedly connected with a first motor; one end of an output shaft of the first motor is rotationally connected with a flywheel through a first belt; one side, near the frame type fixed frame, of the flywheel is fixedly connected with a crankshaft through a clutch; the middle part of the crankshaft is rotationally connected with a connecting rod; one end, far from the crankshaft, of the connecting rod is rotationally connected with a slide block through a pin shaft; the bottom of the slide block is fixedly connected with a punching device; the bottom of the punching device is fixedly connected with a punching cutter; the bottom of the punching device is fixedly connected with a compression support column; the bottom of a compression device is fixedly connected with a pressing plate; and a first through hole is formed in the pressing plate. The invention relates to the field of shoe production. The punching device for shoe production enables the slide block to realize movement up and down through the connecting rod by rotation of the crankshaft, solves such problems as low punching efficiency and different hole distances, and improves the production efficiency.

The invention discloses a high-speed bullet train with end plates and air brake ground effect wings, and belongs to the technical field of high-speed bullet trains. Ground effect wings are installed on a high-speed bullet train engine and two sides, close to the ground portion, of each compartment in an equal altitude and evenly spaced mode, an end plate is arranged on a wingtip of each ground effect wings, and meanwhile an air brake is arranged on the upper surface of each ground effect wings. The high-speed bullet train with the end plates and the air brake ground effect wings is suitable for a current railway system, abrasion loss between wheel tracks is reduced to some extent, maintenance cost is reduced, and emergency braking distance is shortened effectively. Good air dynamic characteristics are utilized sufficiently, ground effect characteristics of the ground effect wings are enlarged by the end plates additionally, emergency braking is achieved effectively by pneumatic braking, and mechanical wear is reduced greatly. The defects that an existing high-speed bullet train is critical in abrasion between wheel tracks and reconstruction of railway track network of magnetic suspension trains are overcome.

The invention provides a brake device of an elevator, wherein a brake member can move along a brake body smoothly when the elevator is braked. The brake device of the elevator brakes the elevator in elevating, and possesses the brake member, an action body and the brake body. The brake member moves upward when the elevator falls down through the friction force pressed on the body to be braked, and moves downward when the elevator moves rises. The action body is arranged at the surface opposite to the brake surface of the brake body, when the brake device is power-off, the brake member moves toward the direction of the body to be braked. The brake body possesses two inclined surfaces approximately parallel to the inclined surface of the brake member, wherein a plurality of rollers are arranged between the brake member and the action body, and between the brake member and the brake body, thereby when the brake member moves up and down, the direct contact is prevented.

The invention discloses a baking system for a permanent magnet direct driving mechanism. The braking system comprises a brake, a braking controller, a battery, an emergency hydraulic brake and a shortcircuit braking contactor. The battery supplies power to the emergency hydraulic brake. An alternating-current hydraulic station provides braking power when a power source of the brakes fails. A braking controller controls the alternating-current hydraulic station. A contact of the short circuit braking contactor is connected to the input end of a permanent magnet synchronous motor in the permanent magnet direct driving mechanism, and the control end is connected with the braking controller. The invention further provides a control method of the braking system for the permanent magnet directdriving mechanism and a gate opening and closing mechanism including the braking system for the permanent magnet direct driving mechanism and the control method. The braking system can achieve emergency braking under the normal condition or abnormal condition, hoisted weight can be safely put down by turning on and off the emergency hydraulic brake after emergency braking is carried out, and the braking system, the control method and the gate opening and closing mechanism are safe, reliable, simple and efficient.