61results about "Self-applying brakes" patented technology

This device is an electric safety brake which is intended for an electric traction vehicle, in particular a rail vehicle comprising: a rotating electromechanical machine (10) having permanent magnets having at least one coil with electric terminals (13, 14, 15), a resistive braking torque production device (22), an electromechanical commutator (20) which is capable of reliably connecting the electric terminals (13, 14, 15) of the machine (10) to the braking torque production device (22).

It is characterised in that the braking torque production device (22) comprises, on the one hand, a bipolar assembly (122) of at least one dissipative resistor, the assembly having two single connection terminals and forming a common terminal bipolar electric output load for all the terminals (13, 14, 15) of the mechanism and, on the other hand, means (120) for converting the currents from all the terminals (13, 14, 15) into a single current which is supplied to the two single terminals of the assembly of at least one dissipative resistor, the conversion means (120) having no active power switches.

A brake control system and method for a train having a lead locomotive or control car, at least one trailing locomotive or control car and, optionally, at least one railroad car. The lead locomotive or control car generates data representing an independent brake demand and data representing an automatic brake demand and transmits the data representing an independent brake demand and the data representing an automatic brake demand to the at least one trailing locomotive or control car. The at least one trailing locomotive or control car receives data representing an independent brake demand and data representing an automatic brake demand and controls a brake cylinder pressure of the at least one trailing locomotive or control car based on the data representing an independent brake demand and the data representing an automatic brake demand.

The invention relates to an integrated-type obstacle detection and derailment detection system. The system comprises an obstacle detection part, a derailment detection part, an electrical box and a center control system. The obstacle detection part is fixedly connected with a bogie of the front end of a train; the derailment detection part is integrated on the obstacle detection part; a derailmentdetection delay module is arranged in the electrical box, the obstacle detection part is connected with the center control system through the electrical box, and the derailment detection part is connected with the center control system through the derailment detection delay module. According to the integrated-type obstacle detection and derailment detection system, through the obstacle detectionpart, a rail obstacle can be detected in real time. Through the derailment detection device, whether or not the train derails can be detected in real time, and the driving safety is improved.

A dual feedback, high accuracy pressure control means for railcar braking systems having an electronic control module. A transducer is electronically connected to the control module for transmitting a pressure signal to the control module. There is a source of fluid pressure with such source of fluid pressure being at least one of a supply pressure and a regulated supply pressure. At least two solenoid valves have a fluid connection to one another and to the transducer and are electronically connected to the control module for receiving at least one of an apply and hold signal. At least two solenoid valves have a fluid connection to one another and to the transducer and are electronically connected to the control module for receiving at least one of a release and hold signal. A relay valve has a fluid connection to at least two of the solenoid valves and to the transducer and to such source of fluid pressure and to a braking device. At least two of said solenoid valves have a fluid connection to such source of fluid pressure. An exhaust to atmosphere having a fluid connection to at least two of the solenoid valves and to the relay valve is provided.

The Smart Resolution Valve Pressure Control System allows any pressure control system using valve state pulsing to modify airflow at an optimum and consistent range of operation thereby enhancing control accuracy and increasing the useable cycle life of any valve combination used.

The invention discloses a wheel speed-limitation structure for a mine running-resisting car; the wheel speed-limitation structure is characterized in that: 2-4 force transferring grooves are uniformly distributed on a wheel hub of the mine car wheel, and an inertia friction block which is reset elastically by pulling force is arranged in each force transferring groove; a concave brake disc is fixedly connected on an axle, and the friction surface of the concave brake disc corresponds to the inertia friction block. The wheel speed-limitation structure has the advantages that the principle that wheel rotating speed controls the speed of a mining car in a degeneration way is adopted, so as to realize the effect of preventing the running car actively, the structure is safe and reliable; compared with the cost of the running-resisting car system, the disaster prevention cost is greatly reduced.

The invention discloses load-bearing self-locking mine logistics equipment. The equipment includes a vehicle body, an object carrying cavity with a forward opening is formed in the vehicle body, a water tank is arranged on the inner top wall of the carrying cavity, a water sprinkling tank is arranged on the left side inner wall of the object carrying cavity, a liquid storage cavity is formed in the water sprinkling tank, a first transmission cavity which is through up and down is formed on the lower side of the liquid storage cavity, a second transmission cavity is formed on the lower side ofthe first transmission cavity, a bearing plate is arranged in the object carrying cavity in a sliding mode, a sliding groove with an outward opening is formed on the right side inner wall of the object carrying cavity, a baffle is arranged in the sliding groove in a sliding mode, a threaded hole with a downward opening is formed in the baffle, and a threaded rod extending downwards is installed inthe threaded hole in a threaded mode. The load-bearing self-locking mine logistics equipment is simple in structure and convenient to operate, solves the problems that the mine car bears load and isself-locked when loading goods, air in a mine channel is too dry during the mine car running and the like, and improves the safety in the mine car running process.

The invention discloses a vibration prevention type centrifugal speed limiter which comprises a casing, a sliding shaft and a rotating shaft, wherein the sliding shaft is arranged in the casing and parallel to the bottom end of the casing; a sliding shaft sliding outlet is formed in the side wall of the casing, one end of the rotating shaft is fixedly connected with the bottom end of the casing, and the other end is located on the outer side of the casing and connected with a drive part; a static slider and a movable slider are symmetrically distributed on the sliding shaft, springs are arranged between the movable slider and the side wall of the casing as well as between the static slider and the side wall of the casing; the vibration prevention type centrifugal speed limiter further comprises a first damper and a second damper, the first damper is connected with the movable slider through a first pull rod, and the second damper is connected with the static slider through a second pull rod. The invention further provides a mining locomotive based on the vibration prevention type centrifugal speed limiter. The vibration prevention type centrifugal speed limiter is simple in structure and high in practicability, and reduces vibration influence on a brake process.

An electrodynamic brake system for a track-bound vehicle powered by a power line (10, 100) comprises: a current collector (11) for connecting the electrodynamic brake system to the power line (10, 100); a DC link (18) provided with a braking chopper (30), the DC link (18) being powered by the power line (10, 100) through the current collector (11); a static converter (20) operable in a rectifier mode and an inverter mode, the static converter (20) having DC terminals (19) connected to the DC link (18) and AC terminals, wherein electric current flows between the DC link (18) and the DC terminals (19) of the static converter (18) in an inverter direction when the static converter (18) operates in the inverter mode; an induction machine (22) operable as induction motor and in the alternator mode, the induction machine being mechanically linkable to a wheel axle (23) and electrically connected to the AC terminals of the static converter (20); a static converter control unit (36) for controlling the static converter (20) such that the static converter (20) operates in the rectifier mode and the induction machine (22) operates in the alternator mode to feed power back to the DC link (18) in response to an emergency braking signal, and an electrodynamic brake supervision unit (36) for shutting off the static converter (20) to isolate the induction machine (22) from the DC link (18) upon detection of a motoring condition during emergency braking.

The invention discloses a mechanical overspeed protection device. The mechanical overspeed protection device comprises a shell, a wheel shaft and a hydraulic brake valve; the wheel shaft is arranged in the shell in a penetrating mode; a left centrifugal block and a right centrifugal block are movably arranged on the cross section of one end of the wheel shaft through a pin shaft; a gear is fixedly arranged at the other end of the wheel shaft in a sleeving mode; a brake spring is arranged between the left centrifugal block and the right centrifugal block in the radial direction of the cross section of the wheel shaft; a polished pin is arranged at the lower end of the right centrifugal block; an adjusting nut used for adjusting the position of the brake spring is arranged at one end of the brake spring and is fixedly connected on the wheel shaft; a spring shaft is fixedly arranged at the other end of the brake spring; the spring shaft and the polished pin are clamped with each other; the hydraulic brake valve is fixedly arranged on the position, corresponding to the spring shaft, of the shell through a connecting plate; and the brake valve comprises a short swing rod used for controlling the hydraulic brake valve. According to the mechanical overspeed protection device, in order to ensure the speed limiting effect, when the clamping of the spring shaft and the polished pin is separated, the natural length of the spring shaft can ensure that the spring shaft completely abuts against the short swing rod, then the hydraulic brake valve is triggered to be started, and therefore a hydraulic braking system is started.

The invention relates to a railway vehicle contact type obstacle detection circuit, which is characterized in that an emergency braking loop adopts a control logic that double train lines are connected in parallel with a backward relay, and ensures that an obstacle detection system can normally trigger the function of an emergency braking system in contact with an obstacle no matter the vehicle is in the working conditions of advancing and backing. And the emergency braking loop is controlled by the relay state of the obstacle detection system, emergency braking is triggered when the ODR loses power, the ODR state is controlled by the normally closed contact of the obstacle detection device, and fault guiding is safe. And power-off triggered braking is ensured. For a monitoring circuit, a normally open contact is adopted to provide input, when an obstacle is triggered, the normally open contact is closed, alarm information is provided, a subsequent alarm strategy is triggered, and reliability and usability are comprehensively considered in circuit design.

The invention provides an intelligent braking and stopping device for freight vehicle derailment. The device comprises a tee joint, a ball valve and an intelligent valve which mainly comprises a three-shaft acceleration sensor, a singlechip, a storage, a driving circuit, a self-holding pilot-operated solenoid valve and a high-energy small-sized lithium cell, wherein the two ends of the tee joint are connected in series to a train air pipe; the ball valve is connected with a third end of the tee joint; and the air inlet of the intelligent valve is connected with the other end of the ball valve, and the air outlet of the intelligent valve is communicated with the atmosphere. When the vertical acceleration of a train bottom reaches 6g or the transverse acceleration reaches 3g after a train starts running, the freight car section is proved to have run off rails and is driven by a train head to advance on a crosstie in a way of shaking up and down, and the self-holding pilot-operated solenoid valve of the intelligent valve is opened from a closed state. Practical tests show that the time from the opening of the solenoid valve on a train tail to the emergency braking of the train head is about 4 seconds in a 60-section freight car, so the device can effectively prevent serious accidents, such as roll-over and the like caused by the derailment of part of freight cars. The device is applicable to various railway freight cars.

A method and mechanism for initiating an emergency stop for an unattended railcar is disclosed. The method may include using a trip arm placed alongside the railway tracks at a designated stop point that may contact a portable trip-cock lever arm that extends out beyond the perimeter of the railcar if the railcar reaches the stop point as it moves along the track. The trip-cock lever arm may be attached to a valve that is connected to the pneumatic brake system of the unattended railcar. As the trip-cock lever arm rotates, the valve may open to release the air pressure in the pneumatic brake system causing the brakes to engage the wheels causing the railcar to stop.

A spring applied parking brake assembly for a railway vehicle is provided which automatically activates upon removal of a railway car from the pneumatic braking system of the railway vehicle. The spring applied parking brake assembly comprises a casing which is mounted on or within the braking system, typically alongside the air cylinder. This casing contains a spring member and a piston assembly, both of which are mounted for longitudinal movement within the casing upon the application and/or removal of pneumatic pressure within the casing. The piston assembly includes a piston rod which is associated with the force transfer lever of the braking system such that upon a removal of pneumatic pressure within the casing, longitudinal movement of the piston rod causes this force transfer lever to rotate and apply a force to at least one force transmitting member in the vehicle braking system to initiate a brake application. An arrangement or system for installing the spring applied parking brake assembly within a railway vehicle braking system is also provided.

The invention relates to the technical field of railway construction, and discloses a decelerator for use on a train utilizing electrorheological fluid. When the train speed is too high, the faster the train wheels rotate, the larger the generated current is, and according to the principle of the electrorheological fluid, the medium in the medium rotating shaft is changed into solid from originalliquid, the friction force on the train wheels is increased, and the rotating speed is gradually reduced. The device is installed on a train wheel through a magnetic inductor. The medium bearing is movably mounted on a train wheel; a decelerating shaft is connected to a central shaft of a train wheel, the decelerating shaft is connected with a rotating shaft through a bearing shaft, the rotating speed is kept consistent, the faster the rotating shaft rotates, the faster the conductor is driven to cut magnetic induction lines, the larger the current generated in a coil is, and a medium is converted into solid from liquid to generate friction force on the decelerating shaft. The automatic decelerating process is thus achieved. When the speed of the train is reduced to a controllable value, the running safety performance of the train is improved, and the life of a passenger and the life of a driver can be ensured.

A Self Activated Power Brake comprising a rotating brake disk fitted coaxially to a wheel and the main brake caliper/shoes fitted on dead axle/body frame. A sliding mechanism having shaped resembles to arc in orbit of brake disk. The mechanism having in two major parts, one is sliding and other is fixed which consists sliding bed and fitted with main power brake caliper. A pilot brake caliper, which is in sliding mode (floating mode), fitted on sliding part of the said sliding mechanism. At least one power transmitting means out of suggested means is needed to be linked the sliding pilot brake caliper to main power brake caliper to transfer the friction power of the pilot brake caliper after required amplification of the same. On braking action, the pilot brake caliper which is actuated by fluid line coming from master cylinder, actuates main power brake caliper through at least one power transmitting means as aforesaid to do the job as a SELF-ACTIVATED POWER BRAKE.

The invention relates to the field of rail-mounted cranes, and particularly discloses a rail-mounted crane gust-preventing emergency braking device which is characterized in that four supporting legs of each crane are respectively provided with a set of rail-mounted crane gust-preventing emergency braking device, and each rail-mounted crane gust-preventing emergency braking device comprises a supporting frame, a guiding unit, a sliding rod, a pair of anti-skid shoes, a locking unit and an action detector; a guide unit is fixed on the support frame to limit left-right swinging and up-down movement of the sliding rod, anti-skid shoes are arranged at the bottom of the sliding rod, the two anti-skid shoes are arranged in an inverted V shape, and the locking unit is used for releasing the sliding rod downwards or locking the sliding rod at a certain height. The device can realize two modes of automatic control and manual control, and the mode of locking the sliding rod by the bolt is simple and reliable in structure and sensitive in transmission; when a typhoon or gust comes, the sliding rod and the anti-skid shoes fall down by means of the gravity of the sliding rod, then the four wheels roll the anti-skid shoes naturally and are blocked by the anti-skid shoes, and the quick braking effect is achieved.

The invention relates to the technical field of rescue equipment special for mining industry, and discloses an emergency protection device for a mining rescue vehicle. The device comprises a vehicle body, an induction assembly is movably connected into the vehicle body, a packaging shell is fixedly connected into the vehicle body, a movable assembly is movably connected to the outside of the packaging shell, a rotating shaft is movably connected into the vehicle body, the exterior of the rotating shaft is movably connected with a speed limiting assembly, and the exterior of the speed limiting assembly is movably connected with a connecting rod. Under the interaction of the vehicle body, the sensing assembly, the packaging shell, the movable assembly, the rotating shaft, the speed limiting assembly and the connecting rod, when the rotating shaft rotates at a high speed and the centrifugal force of the rotating shaft is larger than the elastic force of a second spring, the rotating speed of the rotating shaft can be limited to a certain extent; and when rollover or large-degree bumping of the vehicle body is sensed, the rotating speed of the rotating shaft can be further limited, and therefore the situation that people in the vehicle are injured due to rollover of the vehicle body is avoided.