453results about How to "Reliable braking" patented technology

The invention provides a hydraulic pressure braking clamp device which comprises a clamp base, a brake cylinder, a lever member, a lever pin and a clamp assembly. The brake cylinder mainly comprises a piston member, a push rod assembly, a gate adjustment assembly, a disc spring assembly and a manual adjustment shaft assembly. The clamp assembly mainly comprises a clamp left assembly, a clamp right assembly, a front gate piece and a rear gate piece. The clamp assembly and the brake cylinder are fixedly arranged on the clamp base. The brake cylinder brakes and remits a train brake disc by means of driving of the lever member to the clamp assembly. The hydraulic pressure braking clamp device can automatically adjust braking gaps between the gate pieces of a hydraulic pressure clamp and wheels, is good in adjustment accuracy, high in adjustment efficiency, safe, reliable, and compact in structure, meets railway vehicle installation requirements of lower floor boards, is convenient and fast in replacement of the expendable gate pieces, and saves maintenance time and cost.

A mine elevator is provided having an anti-explosion traction system, an anti-explosion lift car protection system, a flexible guide rail guiding system, a compound lift car, and a counterweight system. The anti-explosion traction system comprises a traction rope tension regulating device, an anti-explosion traction machine, and an anti-explosion control cabinet. The anti-explosion lift car protection system comprises a rope holder, a speed limiter, two hydraulic buffers, a safety clamp, a brake rope, and a brake rope tension buffer device. The flexible guide rail guiding system comprises a steel wire rope guide rail, a guide rail tension device connected to the steel wire rope guide rail and fixed to the an upper platform, a guide rail connection device connected to the steel wire rope guide rail and fixed to a lower platform, and a flexible guide rail guide sleeve fixed to the compound lift car and the counterweight system.

The invention relates to a frictional material, in particular to a novel brake pad material of truck. The invention provides a novel brake pad material of a truck, wherein the novel brake pad material is used in a dry one-step hot press molding process applied to a nanocopper modified phenolic resin agglutination technology and a parent material modifying and adjusting technology. The raw material mixing ratio of the novel brake pad material is as below: 15%-20% of binder, 30%-50% of framework material, 10%-15% of friction enhancing agent, 5%-10% of anti-friction agent and 20%-30% of filling material. The binder is nanocopper modified phenolic resin, the framework material is mineral fibre and the like, the friction enhancing agent is great-hardness chromium ore power, and the like, the anti-friction agent is low-hardness graphite, and the like, the filling material is BaSO4, coarse whiting, and the like. The novel brake pad material has the advantage that a brake lining has a stable friction factor, stable recovery performance, good heat resistance, no crack performance, low speed sensitivity, good wearability and no braking noise.

The invention relates to a magneto-rheological fluid brake, comprising a rotor, a stator, a sealing cover, and a transmission shaft, which is characterized in that a plurality of closed cavities filled with magneto-rheological fluid are arranged around the rotor; the stator is composed of an annular hollow housing, an annular fixed retainer, and an annular movable retainer; a plurality of permanent magnets uniformly distributed in circumferential direction with the same regularity are fixed on the inner side surfaces of the fixed retainer and the movable retainer; the fixed retainer and the movable retainer with permanent magnets are axially paralleled in the casing; a plurality of windows are uniformly distributed on the inner side surface of the casing; two axially adjacent permanent magnets belonging to the fixed retainer and the movable retainer respectively share the same window; a magnetic-inductive plate is embedded in each window; the fixed retainer and the movable retainer are made of magnetic conducive materials, and the other parts of the casing are made of non-magnetic materials. The magneto-rheological fluid brake has the advantages of realization of brake, power saving, convenient operation and actualization, reliable brake performance by adopting permanent magnets as magnetic source, and changing direction of closed magnetic circuit through rotation of the movable retainer.

The invention discloses a novel double-braking rim driving device, and relates to a double-braking device for tire parking braking and driving braking. The novel double-braking rim driving device comprises a supporting base, a hydraulic motor, a planetary gear speed reducer, a parking brake, a driving brake and the like, wherein a plurality of groups of movable friction sheets of the driving brake are respectively embedded into splines arranged outside an inner gear shell of the planetary gear speed reducer; a plurality of groups of steel sheets are simultaneously connected onto a connecting rod in series; and a rubber ring is arranged between each steel sheet and each movable friction sheet, which are adjacent. The braking on the inner gear shell is directly carried out so that the braking is more reliable and safer; elastic auxiliary steel sheets of the rubber rings and the movable friction sheets are completely separated, so that movement failure is prevented from happening; the driving brake is additionally provided with a cooling circulating system, so that heat generated by the driving braking can be eliminated, parts are prevented from being damaged at a high temperature, and the service life is prolonged; and the improved rim driving device also has the advantages of compact structure, high working efficiency, large transmission torque and the like.

In the invention, a conical pin and its driving device are mounted in the fixing and rotating parts of the rotary supporting mechanism of wind-mill generators with the drill hole or there is a drill hole on the brake. The conical pin and its driving device are mounted at the proper position of the rotary chassis.

The invention discloses an electromagnetic brake, a friction piece thereof and a friction piece manufacture method. The electromagnetic brake comprises an iron core assembly, a magnetic roof assembly, a friction member and a manual brake release assembly, wherein the magnetic roof assembly comprises a magnetic roof; the manual brake release assembly comprises a bolt; the iron core assembly comprises an iron core bottom plate, an iron core outer ring, an iron core inner ring, a coil and a skeleton; the friction member is arranged on the outer side surface of the magnetic roof; the friction member and the magnetic roof are transversally positioned; the friction member is made of metal; the middle part of the outer side surface of the magnetic roof concaves inwards to form a spherical surface shape; the middle part of the outer side surface of the friction member convexes outwards to form the spherical surface shape which fits the inwards concave spherical surface part of the outer side surface of the magnetic roof, or, the middle part of the outer side surface of the magnetic roof outwards convexes to form the spherical surface shape, and the middle part of the outer side surface of the friction member concaves inwards to form the spherical surface shape which fits the outwards convex spherical surface part of the outer side surface of the magnetic roof. The electromagnetic brake has the advantages of big braking force, stable and reliable braking, convenient and simple assembly, energy saving, fast release, short time delay, low noise and the like.

The invention relates to a brake control method of an automobile brake-by-wire system and an electric brake. The brake mode comprises a travelling braking mode and a parking braking mode; in the travelling braking mode, an electronic brake pedal sends a travelling braking signal to a control unit, and the control unit drives the electric brake to realize travelling brake through a driving unit according to the travelling braking signal; and in the parking braking mode, a parking button sends a parking braking signal to the control unit, and the control unit drives the electric brake to realize parking brake through the driving unit according to the parking braking signal.

The invention discloses a winch brake device which comprises a brake shaft, an outer brake cone plate, an inner brake cone plate, a brake hub, a spiral clutch mechanism and a brake coupling band, wherein the outer brake cone plate, the inner brake cone plate, the brake hub, the spiral clutch mechanism and the brake coupling band are arranged on the brake shaft; a brake drum is meshed with drum key teeth of the winch; the brake shaft drives the spiral clutch mechanism to separate; the outer brake cone plate and the inner brake cone plate respectively clamp the brake hub by the separating process of the spiral clutch mechanism; the outer brake cone plate and the inner brake cone plate are adopted to clamp the brake hub; and the brake hub and the cone plate are in conical contact, the area is larger, the friction force is increased, and brake is reliable. Compared with the existing conical drum tensioning brake, the brake hub is meshed with the drum key teeth of the winch, so the brake force loss is small, the brake response is effectively improved, and the brake performance of the winch is comprehensively improved.

The invention discloses a broken rope protective device of an upright lift gate. The broken rope protective device comprises a bearing shaft, one end of the bearing shaft is connected with the upright lift gate, and the other end is equipped with a mounting substrate, two surfaces of the mounting substrate are respectively equipped with a broken rope triggering mechanism and a track clamping executive mechanism. The invention adopts a bearing shaft as a protected object to connect with the device, the gravity of the lift gate is used for braking, and the spring force is mainly used for triggering the broken rope; and therefore, the braking force is in proportion to the gravity of the lift gate directly, that is, the heavier the lift gate is, the greater the braking force is. The broken rope protective device is reliable in braking, and compact in structure. By adopting a pair of lever mechanisms in the broken rope triggering mechanism in the invention, the broken rope protective device is flexible in action and reliable. A rack mechanism and a gear mechanism are applied to the track clamping executive mechanism to convert the linear motion into the rotary motion; and the clamping force is amplified by using a method for reducing a clamping cam force arm, so that the broken rope protective device has a compact structure, and high action reliability.

The present invention relates to an elevator two-way overspeed protection equipment. Said invention includes a rope-clamping device formed from frame body, two energy-storing spring mechanisms, brake frame with movable brake plate, fixed brake plate and unhooking mechanism, two-way speed-limiting device and control rope connected between rope-clamping device and two-way speed-limiting device. It is characterized by that between the movable brake plate and fixed brake plate of described brake frame a wedge-shaped brake plate is formed, and can be upwards slided so as to attain the brake effect. Said invention is reliable and good in brake effect and its safety is high.

A superimposed braking driver of a normally closed type brake comprises a driver (1), the external end of a push rod (7) is used for connecting a driving arm (8) in a braking part by hinge shaft so as to act on the braking part (9), a superimposed braking mechanism which can lead the braking part to realize superimposed braking is arranged, and the superimposed braking mechanism acts on the braking arm (10) in the braking part (9) by a corresponding component; the superimposed braking mechanism can adopt a plurality of structures like a superimposed braking mechanism (11a) or a superimposed braking mechanism (11b) or a superimposed braking mechanism (11c). By operating the driver (1) individually, the openness and restoration of the normally closed brake can be realized, and according to requirement, the superimposed braking mechanism can be operated individually to realize the superimposed brake; and the working process of the openness and restoration of the normally closed brake can be applied to a working condition with frequent braking individually to lead the normally closed brake and the superimposed brake to be in a working process of a braking mode, and can be applied to a more stable and reliable braking.

The invention discloses a braking valve bank, which comprises an energy accumulator, a pressure detector, a liquid charging valve, a one-way valve and a working valve, wherein the energy accumulator is used for storing oil; the pressure detector is used for detecting the pressure of the oil in the energy accumulator; the liquid charging valve is arranged on a liquid charging oil path of the energy accumulator, and is used for charging liquid into the energy accumulator; the one-way valve is used for locking the oil in the liquid charging oil path and preventing the oil from reflowing; the working valve is arranged on a working oil path of the energy accumulator, and is used for controlling the oil of the energy accumulator to be released; and two independent oil paths, i.e.,, the charging oil path of the energy accumulator and the working oil path of a brake. The invention further discloses a hydraulic system having the braking valve bank and a typical operation machine, i.e., a tower type concrete spreader having the hydraulic system. The braking valve bank can be applied to braking, clamping, pressure keeping, and the like.

The invention belongs to the field of rigid mining dump trucks, and particularly relates to a braking device of a heavy-duty mining dump truck. The braking device comprises an oil tank, a brake pump, a braking multiple-unit valve, a pedal braking valve and a front brake, an oil suction port of the brake pump is connected with the oil tank, an oil outlet of the brake pump is connected with the braking multiple-unit valve via a filter, the braking multiple-unit valve is respectively connected with a parking braking valve and the pedal braking valve, the pedal braking valve is respectively connected with the front brake and the parking braking valve, and the parking braking valve is respectively connected with a rear brake and a parking brake. Since the braking multiple-unit valve, the parking braking valve and a loading braking valve are arranged to enable the braking device of the heavy-duty mining dump truck to realize functions of driving brake, parking brake, loading brake, emergency brake and automatic brake, safety and reliability of the truck are effectively improved.

An anti-falling brake-buffer system for a mining express elevator comprises brake ropes fixed at the two sides of a car platform sill, one end of each brake rope is fixed at the top of a vertical shaft, the other end of the brake rope is fixed at the bottom of the vertical shaft, and a linkage mechanism is arranged at the bottom of the car platform sill, a buffer is arranged at the top of the brake rope, a tension connector is arranged at the bottom of the brake rope, and a safety tongs of the brake rope, which is fixed on the brake rope and connected with the linkage mechanism, is arranged at the bottom of the car platform sill; and the buffer comprises a pair of inversed progressive safety tongs of the brake rope, a buffer rope connected with the brake rope is arranged in the progressive safety tongs of the brake rope, and a buffer rope clamp is arranged on the buffer rope. According to the anti-falling brake-buffer system for the mining express elevator, the installation is convenient, the buffer force of the brake rope is constant and adjustable, the anti-falling braking is reliable, and the safety of a non-rigid guide rail elevator in high-speed running is improved. The anti-falling brake-buffer system can be acted on the brake rope to play a buffer role, also plays a role of braking reliably when the elevator falls or brakes, so that the safety of the mining express elevator in the high-speed running can be improved.

The invention relates to an automatic mechanical running-preventing mine car comprising a mine car bucket (8), a braking device installed on a mine car frame (7) and a speed sensing device mounted on a wheel (6). The automatic mechanical running-preventing mine car is characterized in that: firstly, the braking device comprises a pair of braking claws (1) mounted on the mine car frame (7), the braking claws (1) are connected with a braking claw releasing plate (3) arranged on the mine car frame through a flexible rope (2), and an elastic element (9) is also arranged between the braking claws and the mine car frame; and secondly, the speed sensing device comprises a slide block installing seat (5) arranged on the wheel (6) as well as a slide block and a spring (10) which are both arranged in the slide block installing seat (5). When the mine car runs with excessive speed, the braking claws can automatically fall under the action of gravity and elastic force so that the mine car is braked in time. The invention solves the problems of complex structure, high cost and short service life of a traditional running-preventing mine car, and is particularly suitable for underground transportation of a mine.

The invention discloses a steering frame of a railway track car with flaw detection devices, which comprises a framework, the upper part of the framework is provided with a traction seat connected with a car body through a traction device; the lower part of the framework is provided with an elastic node seat which is connected with a shaft box body through an elastic node; the shaft box body is connected with wheel pairs; a support spring arranged on the framework, a horizontal shock absorber and a two-system vertical shock absorber form a two-system suspension system of the car body; a shaft box spring with one end supported at the upper part of the shaft box body and the other end supported at the lower end of the framework and a one-system vertical shock absorber arranged on the framework form a one-system suspension system of the car body; the end part of the framework is provided with a unit brake; the shaft box body is provided with flaw detection devices arrange at intervals along the direction of steel tracks; and detection wheels of the flaw detection devices are in direct contact with steel tracks between the wheel pairs. According to the invention, the manufacturing cost is lowered, the shock of the detection wheels is reduced, the flaw detection accuracy rate is improved; moreover, the steering frame has the advantages of good operation quality is good, high pass curve performance, small horizontal force of wheel tracks, reliable braking performance and great convenience in maintenance and can completely meet the requirement of steel track flaw detection with high flaw detection speed.

The invention belongs to the technical field of automotive auxiliary brake devices and particularly relates to a mechanical connection type engine integration rocker arm brake device with a valve lift reset function. A roller is arranged at one end of a rocker arm through a pin and is in contact connection with an exhaust cam; a brake mechanism is arranged at the other end of the rocker arm and controls the motion of an exhaust valve bridge; a control mechanism is mounted at the position, between the brake mechanism and a rocker arm shaft, on the rocker arm; a brake oil way is arranged on the rocker arm shaft; the exhaust cam rotates to drive the rocker arm to swing around the rocker arm shaft, and drives the motions of the control mechanism and the brake mechanism under the cooperation of an electromagnetic valve to further control the motion of the exhaust valve bridge. The mechanical connection type engine integration rocker arm brake device has the valve lift reset function and a valve gap adjusting function, the layouts of the control mechanism and the brake mechanism are further improved, integration of valve lift reset is optimized, and the structure is more compact, so that adverse factors in the engine brake process are eliminated and weakened, and the brake process is more reliable.

Technical scheme of the invention is as follows. If it is supposed that L1, L2 are as inductances of windings at primary side and subsidiary side; R1, R2 are as resistances of windings at primary side and subsidiary side. Relation between terminal voltage u1 of a winding of transformer, current i1 of flowing into the winding and mutual inductance chain of transformer is as U1 - R1í‡i1 - Lí‡di1 / dt = dPhi / di. In the mutual inductance chain, cancellation between i1 and i2 is carried out. Thus, the differential current is as excitation surge current. Advantages are: raising action speed of differential protection of transformer, discriminating each internal fault in transformer by using less time, reducing harms on transformer and running system from faults of transformer, and increasing safety and stability of power system.

The invention discloses an electric internal clamp for a pipeline. The electric internal clamp for the pipeline comprises a rack, a motor, a driving device and butt working portions, wherein the butt working portions and the driving portion are respectively connected with the motor; a braking portion connected with the motor is also arranged. The internal clamp disclosed by the invention is divided into a front portion and a rear portion; mainly by means of three sets of identical coaxial line butt tensioning mechanisms driven by the motor, the center line of the internal clamp is superposed with that of the pipeline; the electric internal clamp for the pipeline is simple and reasonable in structure, low in duty ratio, convenient to adjust, small in inertia, reliable in braking, good in control system robustness and high in butt precision, and is capable of directly utilizing electric energy; compared with hydraulic and pneumatic internal clamps, the electric internal clamp for the pipeline has the advantages that the construction cost can be reduced, and the construction efficiency can be improved.

The invention relates to an electronically controllable pneumatic brake system (100), comprising: at least two brake circuits (A, B, C), wherein at least one of the at least two brake circuits (A, B,C) is assigned an electrically and pneumatically controllable control valve (11, 13) for specifying brake pressures (p1, p2, p3, p4, pPB) for controlling wheel brakes (1, 2, 3, 4) of the associated brake circuit (A, B, C); and a first control unit (110), which is designed to electrically control the control valve (11, 13) in question in accordance with a vehicle target deceleration (zSoll) requested in an automated manner or in accordance with an actuation (ds) specified by the driver by means of an actuation device (24a). According to the invention, at least one bypass valve (21) associated with a control valve (11, 13) is also provided, which bypass valve is designed to pneumatically (pA, pB) control the associated control valve (11, 13), wherein the pneumatic control (pA, pB) is performed in accordance with the vehicle target deceleration (zSoll) requested in an automated manner or in accordance with the actuation (ds) specified by the driver.

The invention discloses a rope traction monorail crane system braking vehicle, and the rope traction monorail crane system braking vehicle comprises a frame, two pairs of walking wheels and two pairs of brake shoes are arranged between two sidewalls of the frame, two pairs of brake shoes are driven by a pair of brake arms, two pairs of brake arms are driven by brake oil cylinder, the frame is provided with a speed selecting and increasing device, the speed selecting and increasing device comprises a first speed selecting wheel, a second speed selecting wheel, a clamping oil cylinder, a dual-direction hydraulic motor and a gearbox, the first speed selecting wheel shaft and the second speed selecting wheel shaft are supported by the first wheel shelf and the second wheel shelf, the shaft of the second speed selecting wheel is connected to the low speed shaft of the gearbox through cross-shaped universal coupler, the high speed shaft of the gearbox is connected to the drive shaft of the dual-direction hydraulic motor through elastic coupler. The speed selecting and increasing device controls two pairs of brake shoes of the braking vehicle by selecting speed judgment, the brake shoes on the other vehicles can also be controlled for guaranteeing the safe drive for the rope traction monorail crane system.

The present invention relates to a large trapezoidal section canal surface concrete lining executive mechanical equipment. It includes large span steel truss with running mechanism, through up-down bogie i.e. material distribution and lining bogie respectively to make canal concrete material distribution, spreading, bumping down and levelling; not only saving feeding equipment and pouring concrete labour bur also in favor of protecting anti-seepage thermal insulation structure layer.

A plate-straightening high order steel tapping machine consists of walking beam, cart, dan and lifting mechanism. The transversing and longitudinal driving system is used by mechanical transmission and frequency variable control. The lifting mechanism is used by U-shaped groove as guider. The gantry stand is used by self-lubricating wheel. It achieves good safety and long using life.

The invention aims to provide a mine single-rope hoisting balance wheel brake rope anti-case-crashing device and relates to the technical field of mine safety devices. A hoisting container is connected with another hoisting balance container through more than two brake ropes and more than two corresponding balance wheels; each balance wheel is arranged on a balance wheel axle; the balance wheel axle is arranged on an elastic bearing device through a bearing; the wheel edge of the balance wheel is provided with a friction brake surface; a damper brake is arranged below the balance wheel; and an idle stroke distance exists in the upward direction and the downward direction of the damper brake and the friction brake surface of the balance wheel. The device not only keeps the advantage of the less investment cost of single-rope hoisting, but also has the safety property of multi-rope falling prevention protection, can completely solve the problems that a falling protector cannot be actuated when rope breaking case crashing or rope sliding case crashing happen in a traditional falling protector system, buffer brake force is uncertain, and the buffer brake force is difficult to be accurately calibrated in an use site, and has the advantages of strong safety and reliability and wide application range.

The invention relates to a mechanical butt joint device, which comprises a bearing plate, a bottom frame, support legs and universal wheels, wherein the bearing plate is used for clamping a butt joint component, the bottom frame bears the bearing plate, the support legs support the bottom frame, the universal wheels are arranged at the bottom of the bottom frame, the bottom frame comprises two mutually parallel longitudinal beams, the middle parts of the longitudinal beams are provided with two mutually parallel transverse beams, and the transverse beams are vertical to the longitudinal beams. The mechanical butt joint device is characterized in that the end parts of the longitudinal beams are provided with the support legs, each support leg is a screw rod ascending and descending mechanism, and the mechanical butt joint device also comprises an adjustment device used for adjusting the butt joint angle of the bearing plate. The mechanical butt joint device has the advantages that the reliable braking of the butt joint device can be ensured, the free adjustment can be realized, and the reliable braking of the butt joint device can also be ensured.

The new type of crane motor includes rotor shaft, cylindrical rotor, stator, side magnetic device, compression spring, conic brake and fan. The side magnetic device and the conic brake cooperate, that is, the side magnetic device generates the axial play force moment of the conic brake and there is no need of complete play of the rotor shaft. The present invention has reliable braking, raised rotor shaft strength, long rotor shaft life, low noise and other features.