75results about How to "Realize automatic braking" patented technology

The present invention provides an unmanned cleaning device which comprises a body of the cleaning device. The inner part of the body is provided with a processor, a memory, a motor controller and an ultrasonic sensing module which are connected with the processor. The memory is stored with path parameters, and the unmanned cleaning device moves along the prearranged path. The motor controller is used for controlling the motor of the unmanned cleaning device. The ultrasonic sensing module is used for detecting the state of the road surface. The invention has the beneficial effect that the path parameters are stored beforehand in the memory to realize the unmanned automatic road recognition running of the cleaning device is realized. The ultrasonic sensing module is adopted to realize the automatic detection and automatic braking of the cleaning device. Additionally, the cam is used for collecting information. The wireless transmission module is connected with the central controller. The remote monitoring to the cleaning device is realized. In this way the unmanned cleaning device is realized and the casualty of the operator is totally avoided.

The invention relates to an operating device for a gearbox. Said operating device comprises a selector lever (1) with stable selector lever positions and a ratchet device with a ratchet element (9) and index gate (8). Said ratchet element (9) is connected to the selector lever (1). According to the invention, the actuation device is characterised in that the index gate (8) is arranged on a gate shaft (4) that can be rotated by an actuator. Said gate shaft (4) comprises at least one return groove (10) for the ratchet element (9) that is wound in a screw-like manner. Said ratchet element (9) can be guided into the target position from a start position by rotating (7) the gate shaft (4) along the return groove (10). Said selector lever positions can reflect the current shift state of the gear box, also in shift-by-wire-controlled gearboxes. A reliable optical and also tactile signal of the shifting state of the gearbox is obtained for the driver. Said operating device is constructively reliable, has a low energy consumption and minimal noise and is also compact.

Provided is a multifunctional reel-type sprinkling machine. On the basis of an original structure, a vehicle return stop linkage device and an automatic water turbine speed-regulating device are additionally arranged. A water spraying traveling crane further comprises a sleeve, an idler wheel and an idler wheel installation frame, wherein the idler wheel installation frame is installed on a metal connection pipe through a clamping hoop. The vehicle return stop linkage device comprises a closing frame arranged at the front end of a machine frame, a closing frame zipper, a locking rod, an adjusting screw rod, a connection rod, a tension spring, a brake pull rod, a swinging arm assembly and a brake connection board, wherein the swinging arm assembly and the brake connection board are arranged on a gearbox. The automatic water turbine speed-regulating device comprises an induction frame and a speed-regulating link rod. According to the sprinkling machine, after the water spraying traveling crane returns back, automatic braking can be achieved through a reel, automatic speed regulation of a water turbine is achieved, and the water spraying traveling crane retreats at a constant speed. The clamping hoop on the water spraying traveling crane can replace an iron wire to bundle a PE hose, bundling can be conveniently achieved, and meanwhile the PE hose is protected against damage; a pipe rack can rotate freely and accordingly action force of the PE hose cannot be forcibly exerted on a ball screw assembly.

The invention provides an automatic detection control device for a heavy rammer, which comprises a high-frequency detection proximity switch, a gear ring and a controller, wherein the gear ring is arranged on the side face of a winding drum of a winding engine; the high-frequency detection proximity switch is close to the gear ring and is arranged on the outer side of the winding drum; and the controller is connected to the high-frequency detection proximity switch. The automatic detection control device for the heavy rammer detects the rotation speed of the winding drum by using the high-frequency detection proximity switch and consequently calculates the released length of a steel wire rope on the heavy rammer so as to realize the automatic brake of a pounder falling freely with a load. The structure of the device is simple and the operation of the device is convenient; therefore, labor cost and material cost are saved considerably, and the working efficiency of the heavy rammer is improved effectively.

The invention relates to a vehicle reversing anti-collision system, which comprises a collection system, a control system, a voice system and a brake mechanism; the collection system is arranged at the tail of a vehicle; the control system is arranged in a trunk of the vehicle; the voice system is arranged at a multimedia chamber of the vehicle; the brake mechanism is arranged under an instrument panel of a driving cab of the vehicle and corresponds to a vehicle brake pedal. An ultrasonic principle is used, an ultrasonic sensor is additionally arranged at the tail of the vehicle, the distance between a reversed vehicle and an obstacle is automatically measured by the ultrasonic sensor, and then a driver is prompted. Meanwhile, according to the distance between the reversed vehicle and the obstacle, an automatic brake device is controlled to automatically brake, so the reversed driven vehicle is automatically alarmed and braked, occurrence of vehicle collision accidents is effectively prevented, the operability of the vehicle is improved and vehicle safety is ensured.

The invention discloses an electric brake booster for an automobile. The electric brake booster comprises a shell and further comprises a jacking rod assembly and a pushing rod assembly which are mounted in the shell; the pushing rod assembly comprises a pushing rod, one end of the pushing rod is connected with a pedal, and the other end of the pushing rod and the jacking rod assembly have a decoupling gap; and the jacking rod assembly comprises a jacking rod, one end of the jacking rod is connected with a driving mechanism, and the other end of the jacking rod is connected with a main cylinder piston. When a driver steps on the pedal, the driving mechanism receives a signal to drive the jacking rod to push the main cylinder piston to achieve braking, meanwhile the pushing rod makes linearmotion under pushing of the pedal, and the pushing rod does not jack the jacking rod assembly because the pushing rod and the jacking rod assembly have the decoupling gap; and when an electric control system loses efficacy, the driving mechanism is not started, after the pedal drives the pushing rod to eliminate the decoupling gap, the pushing rod jacks the jacking rod assembly, the main cylinderpiston is pushed by the force generated by stepping of the driver on the pedal, and thus braking under the electric control failure situation is achieved.

Provided is a safety intelligent baby stroller capable of regulating and controlling the environment. The safety intelligent baby stroller is characterized in that the safety intelligent baby stroller comprises a controller module, a regulation and control environment module, an attitude detection module, a body overturning-resistant module, a driving module, a brake module, a speed detection module, a voice control module, a voice playing module, a power supply module, a touch display module, and a baby stroller body, and the controller module is respectively connected with the regulation and control environment module, the attitude detection module, the body overturning-resistant module, the driving module, the brake module, the speed detection module, the voice control module, the voice playing module, the power supply module, and the touch display module. According to the safety intelligent baby stroller capable of regulating and controlling the environment, the environment in the baby stroller can be autonomously regulated and controlled, the attitude of the baby stroller can be detected in real time, the overturning of the body of the baby stroller is actively prevented, speed control and reasonable speed limit of the baby stroller are realized, automatic brake of the baby stroller is realized, and the slipping of the baby stroller is prevented.

The invention discloses a safe intelligent baby carriage capable of preventing a baby from being stolen. The safe intelligent baby carriage capable of preventing the baby from being stolen is characterized by comprising a controller module, a user fingerprint module, a posture detecting module, a baby carriage body turnover preventing module, a traveling module, a braking module, a speed detecting module, a voice control module, a voice broadcasting module, a power supply module, a baby detecting module and a baby carriage body, wherein the controller module is connected with the user fingerprint module, the posture detecting module, the baby carriage body turnover preventing module, the traveling module, the braking module, the speed detecting module, the voice control module, the voice broadcasting module, the power supply module and the baby detecting module. The safe intelligent baby carriage capable of preventing the baby from being stolen is advantageous in that, the baby in the baby carriage can be prevented from being stolen by non-privileged users, the posture of the baby carriage is detected, the baby carriage body is actively prevented from turnover, the speed of the baby carriage is controlled and reasonably limited, automatic brake can be performed so as to avoid rolling of the baby carriage, and whether the baby is in the baby carriage or not is detected.

The invention discloses a brake system of a stroller. The brake system is arranged on a frame. Brake mechanisms are respectively arranged between rear wheels and rear wheel seats on two sides of the frame, signal transmitting units and a switch button are arranged on a push handle of the frame, the switch button is used for driving the signal transmitting units to transmit signals, signal receiving units are arranged on the brake mechanisms and are in wireless signal connection with the signal transmitting units, power units which are used for powering the signal transmitting units and the signal receiving units are arranged on the frame, the brake mechanisms comprise first electromagnets or first metal suction components and second metal suction components or second electromagnets, the first electromagnets or first metal suction components are arranged on the rear wheels, and the second metal suction components or second electromagnets are arranged on the frame. The brake system has the advantages that a pushing person can hold the push handle with the hands to touch the switch button when pushing the stroller, accordingly, the signals can be transmitted by the signal transmitting units, the electromagnets can be powered off by the aid of the signal receiving units, brake can be relieved, and the stroller can run normally; the signals disappear when the hands of the pushing person leave the push handle, power-on states of the electromagnets are recovered, the metal suction components can be sucked by the aid of magnetism of the electromagnets, accordingly, the rear wheels cannot rotate, automatic brake effects can be realized, and the safety performance of the integral stroller can be greatly improved.

The invention provides a novel walking type winding machine. A protection ring on the front portion of the novel walking type winding machine is fixed to a frame of a steering portion. The novel walking type winding machine is provided with a steering counting device. The steering counting device is provided with a first sensor which senses the steering of a vehicle body, the first sensor is connected with a controller of the novel walking type winding machine and used for making the controller determine the number of steering times. A second sensor is arranged in the steering portion. The second sensor or a part fixedly connected with the second sensor is supported by an elastic part so that the second sensor can be movably installed on the steering portion, and the second sensor is used for sensing the backward movement, relative to the second sensor, of the frame of the steering portion or a part fixedly connected with the frame. By means of the novel walking type winding machine, the film winding route of the novel walking type winding machine can be easily and accurately controlled, the important part of the steering portion can be protected, the walking direction changing flexibility of the novel walking type winding machine can be improved, and the impact exerted on the vehicle body when the novel walking type winding machine comes across barriers can be reduced.

The invention discloses a vehicle automatic braking method, device and equipment and a storage medium, and relates to the technical field of vehicle braking control. The method comprises the steps ofobtaining the position relation of a front vehicle relative to a host vehicle, and judging a lane where the front vehicle is located; when it is judged that the front vehicle is located on the adjacent lane of the lane where the host vehicle is located, calculating the transverse distance of the front vehicle relative to the host vehicle and the course angle of the front vehicle according to the position relation, and judging whether the front vehicle has the tendency to converge into the lane where the hos vehicle is located according to the course angle and the transverse distance; when it is judged that the front vehicle has the tendency to converge into the lane of the host vehicle, inputting the current motion parameters into a pre-trained first safe distance model to obtain first safe distance parameters, wherein the motion parameters comprise a currently estimated pavement adhesion coefficient; and controlling the vehicle to brake according to the first safety distance parameterand the actual longitudinal distance between the two vehicles. By means of the method, automatic braking can be achieved under the front vehicle cut-in working condition, the situation of collision with the front vehicle is effectively avoided, and practicability is greatly improved.

The invention is suitable for the technical field of navigation and provides a speed-limiting control method, a speed-limiting control system and a vehicle terminal. The method comprises the following steps of: acquiring current vehicle position information and current running speed; sending the current vehicle position information and the current running speed to a remote server; receiving a speed-limiting control command sent by the server, wherein the speed-limiting control command comprises a braking command and a non-braking command; and when the speed-limiting control command is the braking command, outputting the braking command to a braking device, wherein the braking command is used for controlling the braking device to execute the braking operation. The method effectively controls the running speed of a vehicle to automatically brakes the vehicle, and has high humanization.

The invention discloses a safe smart baby carriage supporting remote video. The safe smart baby carriage supporting remote video is characterized by comprising a controller module, a remote video module, a posture detection module, an anti-overturning module, a running module, a brake module, a speed detection module, a voice control module, a voice playing module, a power supply module and a baby carriage body, wherein the controller module is connected with the remote video module, the posture detection module, the anti-overturning module, a running module, the brake module, the speed detection module, the voice control module, the voice playing module and the power supply module respectively. Through adoption of the safe smart baby carriage supporting remote video, a baby can be nursed at any time via remote video; the posture of the baby carriage can be detected in real time; the baby carriage can be actively prevented from being overturned; the speed of the baby carriage is controlled and limited reasonably; and automatic braking of the baby carriage is realized to prevent the baby carriage from sliding.

The invention relates to an intelligent safe fall-prevention baby carriage. The intelligent safe fall-prevention baby carriage is characterized by comprising a controller module, a body fall prevention module, a posture detection module, a body overturn prevention module, a running module, a brake module, a speed detection module, a voice control module, a voice broadcasting module, a power supply module and a baby carriage body. The controller module is connected with the body fall prevention module, the posture detection module, the body overturn prevention module, the running module, the brake module, the speed detection module, the voice control module, the voice broadcasting module and the power supply module. The intelligent safe fall-prevention baby carriage can actively prevent the baby carriage body from falling, the gesture of the baby carriage can be detected in real time, the baby carriage body is actively prevented from falling, the baby carriage is subjected to controlling and reasonable speed limiting, so that the baby carriage is automatically braked and the baby carriage is guaranteed not to slide.

The invention discloses a brake system of a baby stroller. The brake system is arranged on a frame. Brake mechanisms are respectively arranged between rear wheel seats and rear wheels on two sides of the frame, signal transmitting units and touch switches are arranged on a push handle of the frame, the touch switches are used for driving the signal transmitting units to transmit signals, signal receiving units are arranged on the brake mechanisms, the signal transmitting units and the signal receiving units are in wireless signal connection with one another, a power unit which is used for supplying power for the signal transmitting units and the signal receiving units is arranged on the frame, the brake mechanisms comprise first electromagnets or matched metal suction components or second matched metal suction components or electromagnets, the first electromagnets or matched metal suction components are arranged on the rear wheels, and the second matched metal suction components or electromagnets are arranged on the frame. The brake system has the advantages that a pusher can hold the push handle to touch the touch switches when pushing the baby stroller, so that the signals can be transmitted by the signal transmitting units, the electromagnets can be powered off by the aid of the signal receiving units, accordingly, brake on the baby stroller can be relieved, and the baby stroller can travel normally; the signals disappear when the hands of the pusher leave the push handle, power-on states of the electromagnets can be recovered, the matched metal suction components can be sucked by the aid of magnetism of the electromagnets, accordingly, the rear wheels cannot rotate, the baby stroller can be automatically braked, and the safety performance of the integral baby stroller can be greatly improved.

The invention provides a balance winch control system used for an automatic braking type under-pressure work device. An oil tank of the control system communicates with a first hydraulic pump unit, asecond hydraulic pump unit and a third hydraulic pump unit. The first hydraulic pump unit communicates with a first check valve and a first automatic braking control unit of a first balance control unit. The second hydraulic pump unit communicates with a second check valve and a second automatic braking control unit in a second balance control unit. The third hydraulic pump unit communicates witha first pilot braking valve and a second pilot braking valve. A pipeline used for the oil tank communicates with a counterbalance valve and a pilot control valve. By means of the control system, the hovering and follow-up functions of an upper winch in under-pressure work are achieved, the balance winch control system can be well used in cooperation with the under-pressure work device for taking down oil pipes and down-hole tools, the automatic braking function and the exceeding-authority braking function of a balance winch are achieved, and automatic braking can be achieved through the system.

The invention discloses an intelligent braking device for a stroller, which comprises a main body of the stroller, a moving wheel, a detection device and a braking device. The moving wheel rotates through a rotating shaft. The device includes an electric telescopic rod, a brake pad, a mounting seat and a telescopic motor. The mounting seat is installed at the bottom of the blocking plate, and the top of the electric telescopic rod is installed at the bottom of the mounting seat. The electric telescopic rod is controlled by the telescopic motor. A protective block is connected, a groove is provided on the surface of the moving wheel, and a separating metal plate is arranged inside the groove, and the brake pad is installed on the side of the moving wheel. The detection device includes a speed sensor, a signal converter and an AT89C51 single-chip microcomputer. The speed is used to realize the automatic braking of the cart. The braking is fast and efficient, which effectively prevents the occurrence of accidents, and has a good cushioning effect. It is not easy to bump when braking, and it is more comfortable to use. It is worth promoting.

The invention discloses an electromagnetic brake motor, and relates to the technical field of motors. According to the technical scheme, the electromagnetic brake motor comprises a machine shell, a rotating shaft and an electromagnet, wherein a brake shaft is rotationally arranged in the machine shell, the brake shaft is sleeved with a clutch cylinder, the clutch cylinder can slide in the axial direction of the brake shaft but cannot continuously rotate around the brake shaft, the rotating shaft is provided with a first tooth part facing the clutch cylinder, the end, facing the first tooth part, of the clutch cylinder is provided with a second tooth part, a spring is arranged between the clutch cylinder and the brake shaft, the elastic force of a spring drives the first tooth part and thesecond tooth part to be connected in an inserted mode, the clutch cylinder is made of a ferromagnetic material, the electromagnet right faces the clutch cylinder, a friction disc is fixed to the brakeshaft, a brake disc is fixed to the machine shell, and the friction disc and the brake disc are kept in an abutting state. When the motor operates normally, the brake shaft and the friction disc do not rotate, so that an energy-saving effect is achieved; when the power supply of the motor is cut off accidentally, the motor can still realize automatic braking of the rotating shaft, so that the motor is relatively safe; and heat dissipation of the friction disc and the brake disc is efficient.

The invention discloses an auxiliary brake device and system. The auxiliary brake device comprises a supporting plate, a worm-gear reduction motor, a microswitch, a motor wheel, a motor wheel cover, atransitional wheel, a steel wire rope and a controller; the worm-gear reduction motor is fixed on one side surface of the supporting plate; an output shaft of the worm-gear reduction motor penetratesthrough the supporting plate; the microswitch, the motor wheel, the motor wheel cover and the transitional wheel are fixed on the other side surface of the supporting plate; and the worm-gear reduction motor drives the motor wheel to pull a braking connecting rod through the steel wire rope to realize braking. The auxiliary brake device has a small structure, is easily mounted, is suitable for different vehicle models and can also be mounted on a main driving seat braking pedal or a sub driving seat braking pedal according to needs; and therefore, the driving safety is enhanced.

The invention provides a safe and intelligent baby stroller. The safe and intelligent baby stroller is characterized by comprising a controller module, a mobile power supply module, a posture detecting module, a body tilting preventing module, a running module, a braking module, a speed detecting module, a speech control module, a speed playing module, a power supply module and a baby stroller body. The controller module is connected with the mobile power supply module, the posture detecting module, the body tilting preventing module, the running module, the braking module, the speed detecting module, the speech control module, the speed playing module and the power supply module, respectively. The safe and intelligent baby stroller provided by the invention is advantaged in that electronic equipment of a user can be charged on the baby stroller, the posture of the baby stroller can be detected in real time; the baby stroller body is actively prevented from tilting; the speed of the baby stroller is controlled and reasonably limited; and the braking of the baby stroller is automatic so that the sliding of the baby stroller is assured.

The invention provides an automatic detection control device for a heavy rammer, which comprises a high-frequency detection proximity switch, a gear ring and a controller, wherein the gear ring is arranged on the side face of a winding drum of a winding engine; the high-frequency detection proximity switch is close to the gear ring and is arranged on the outer side of the winding drum; and the controller is connected to the high-frequency detection proximity switch. The automatic detection control device for the heavy rammer detects the rotation speed of the winding drum by using the high-frequency detection proximity switch and consequently calculates the released length of a steel wire rope on the heavy rammer so as to realize the automatic brake of a pounder falling freely with a load.The structure of the device is simple and the operation of the device is convenient; therefore, labor cost and material cost are saved considerably, and the working efficiency of the heavy rammer is improved effectively.

The invention relates to the technical field of big data analysis equipment, and specifically discloses an analysis device for network big data. The analysis device comprises a device main body, driving wheels and a universal wheel, wherein a driving rod is rotationally arranged at one end of the bottom of the device main body, the two ends of the driving rod are coaxially and fixedly connected with the driving wheels, the driving rod is coaxially and fixedly connected with a turbine, a two-axis motor is fixedly connected in the device main body, the output shafts at the two ends of the two-axis motor are coaxially and fixedly connected with rotating shafts, the rotating shaft at one end is coaxially and fixedly connected with a worm, the other end at the bottom of the device main body isprovided with the universal wheel, the rotating shaft at the other end is connected with a jacking frame, a supporting frame can be arranged in the device main body in a lifting manner, the jacking frame is nested in the supporting frame, a brake plate is connected with the bottom of the supporting frame, and the interior of the device main body is elastically connected with the supporting frame through a first spring. The analysis device for the network big data has the advantages of simple structure, low manufacturing cost, small occupation volume, convenient use, and realizing automatic braking.

The embodiment of the invention provides a braking system and an automobile. The braking system includes an electronic control unit, a braking electromagnetic valve, a brake, a parking electromagneticvalve, a parking brake and an energy storage device. The braking electromagnetic valve is electrically connected with the electronic control unit and used for receiving a first control signal sent bythe electronic control unit. The brake is connected with the braking electromagnetic valve and used for braking the automobile. The parking electromagnetic valve is connected with the electronic control unit and used for receiving a second control signal sent by the electronic control unit. The parking brake connected with the parking electromagnetic valve is used for controlling the automobile to be parked. The energy storage device is used for supplying energy to each component of the braking system.

The invention discloses a logging winch super depth protection system, which comprises a pneumatic brake loop and a control circuit of power system. A commutation and selection loop is arranged between the manual directional valve and the air compressor of the pneumatic brake loop, and the control circuit is provided with an alarm signal processing circuit; when the depth value of the logging winch exceeds a set value, the alarm signal processing circuit receives the alarm signal in the control circuit to generate alarm control signal to control the commutation and selection loop to work, and after the motion of the commutation and selection loop, the pneumatic brake loop can be started to brake. The invention establishes the association of the power system and depth monitor system of the logging winch, and realizes the protection function of automatic brake for the logging winch with super depth.

The invention discloses application of the electromagnetic induction principle. The application of the electromagnetic induction principle comprises a switch, a power supply, a limit shell, a ring magnet, a coil, a spot galvanized solenoid, a brake lever, a ring limit snap spring and an inner wheel provided with a neck. The invention belongs to the technical field of manufacturing of baby strollers and provides the application of the electromagnetic induction principle. The magnetic effect of the current and the like pole repellant principle are utilized. The circuit is switched on when people push a baby stroller by holding the handle, the brake lever is automatically separated from a brake groove, wheels are freed, thus people can push the baby stroller freely, the circuit is switched off when the hands leave the handle, the wheels are automatically locked, and the baby stroller cannot be moved forwards. According to the device, automation is ingeniously introduced into brake devices of baby strollers, thus the national standard of baby strollers is realized, and the application of the electromagnetic induction principle has higher social value and practical significance.

The invention relates to a braking method for a belt conveyor. The braking method comprises the following steps that S1, a driving motor is started to drive a driving shaft to rotate, the driving shaft drives a brake block to rotate, and the brake block drives rolling balls to move outwards along second rolling grooves; S2, the rolling balls move along first rolling grooves due to the limiting ofthe first rolling grooves, the rolling balls spirally move to the left, and the rolling ball pushes a sliding block to move to the left side and compresses a spring; and S3, the driving shaft continues to rotate, a belt pulley and a driving belt are driven to rotate, and then the belt conveyor is driven to operate; and when the driving motor is stopped, the driving shaft loses power, the sliding block moves to the right under the elastic force of the spring, and the rolling balls move reversely to starting positions. According to the braking method, braking of the belt conveyor without additional power is carried out and reverse rotation of the belt conveyor is prevented by cooperation of the spring, the sliding block, a brake sleeve, the rolling balls and the brake block, and the brakingoccasion can be accurately controlled.

The invention discloses a safe intelligent baby carriage capable of being lifted. The safe intelligent baby carriage capable of being lifted is characterized by comprising a controller module, an automatic lifting module, a posture detecting module, a baby carriage body turnover preventing module, a traveling module, a braking module, a speed detecting module, a voice control module, a voice broadcasting module, a power supply module, and a baby carriage body, wherein the controller module is connected with the automatic lifting module, the posture detecting module, the baby carriage body turnover preventing module, the traveling module, the braking module, the speed detecting module, the voice control module, the voice broadcasting module and the power supply module. The safe intelligent baby carriage capable of being lifted disclosed by the invention can be automatically lifted to achieve a height needed by a user, detects the posture of the baby carriage in real time, actively prevents the baby carriage body from turnover, controls and reasonably limits the speed of the baby carriage, and realizes the automatic braking of the baby carriage so as to prevent the baby carriage from sliding.

The invention discloses a novel application device and belongs to the technical field of baby stroller manufacturing. The novel application device comprises a switch, a power source, a limiting shell,an annular magnet, a coil, a power-on solenoid, a braking rod, annular limiting clamp springs and wheels with clamp grooves. According to the novel application device, through the electric current magnetic effect and the repulsion principle of like magnetic poles, when a hand holds a handle to push a baby stroller, a circuit is turned on, the braking rod automatically breaks away from a braking groove, the wheels are released, and the baby stroller can be freely pushed; and when the hand breaks away from the handle, the circuit is turned off, the wheels are automatically locked and cannot advance. According to the novel application device, automation is ingeniously introduced into a baby stroller braking device, the nation standard of the baby stroller is achieved accordingly, and high social value and reality signification are achieved.

The invention relates to the technical field of winch devices, in particular to a winch for captive balloon cable take-up and paying-off. The winch comprises a power assembly and a rotary supporting assembly. The rotary supporting assembly comprises a winding drum and a photoelectric sliding ring, the photoelectric sliding ring and the power assembly are both arranged on the inner side of the winding drum, the power assembly comprises a driving component, a brake component, a first gear pair and a first transmission shaft, the first transmission shaft is connected with the winding drum throughthe first gear pair, the driving component is connected with the first transmission shaft through the brake component so as to drive the winding drum to rotate in the axial direction, an optical fiber and an electric wire at the fixed end of the photoelectric sliding ring are connected with an external optical transmitter and receiver and a power source, an optical fiber and an electric wire of the rotary end of the photoelectric sliding ring are connected with a captive balloon cable, the photoelectrical sliding ring and the winding drum are coaxially arranged, the rotary end is connected with the winding drum, and therefore the winding drum drives the rotary end of the photoelectrical sliding ring to rotate. The internal space of the winding drum is effectively utilized, the overall size of the winch is reduced, and carrying is convenient; and automatic brake of the winch is achieved in the ways of thread rotation and friction piece pressing, and operation is easy and convenient.

The invention discloses a brake device for a rail line trolley, and belongs to brake devices of construction rail vehicles. The device comprises a frame, a wheel pair is arranged at the bottom of the frame; a transmission mechanism and a brake mechanism are mounted on the frame; the transmission mechanism comprises a supporting seat mounted at the end part of the frame; one side of the transmission rod is hinged to the supporting seat; the push rod is mounted at the top of the transmission rod; the brake mechanism comprises a brake pad which is arranged opposite to a roller on the wheel pair; one end of the brake pad support is connected to the brake pad, and the other end of the brake pad support is connected with the transmission rod; a spring connecting sheet II and a spring connecting sheet I are respectively arranged at the bottom of the frame and on the side wall of the transmission rod; a spring is arranged between the second spring connecting part and the first spring connecting part. According to the invention, the problems of low braking efficiency, high operation risk, high sliding probability and incapability of standardized operation of a trolley used in conventional rail transit line construction are effectively solved.