122results about How to "Sensitive brakes" patented technology

The invention relates to an in-situ nanometer intensified aluminum alloy wheel hub with light weight, high strength and fatigue resistance for a new energy automobile and a manufacturing method thereof. Through in-situ chemical reaction of a melted body, nanometer particle compound reinforcement is realized by Orowan reinforcement + refined crystalline reinforcement, long-term compound metamorphism and complex refinement are integrated, and the refined crystalline reinforcement is achieved. The purification technology of nitrogen and argon combined rotary air refining + aluminum-rear earth isadopted, multi-stage deep purification of aluminum melted body is realized, the characteristic that argon is greater than air in density is used for forming a protective layer on the surface of the melted body, and alloy is introduced between the aluminum-rear earth to produce intermediate compounds with the density greater than that of the particles, and therefore the deep high-efficiency purification is effectively achieved. A novel low pressure shaping technology of progressive solidification + rapid crystallization is adopted in the end, due to the fact that crystallization time is shortened, the space between secondary branch crystal arms in a casting microstructure is shortened, the structure is refined and the feeding effect is enhanced, the casting is denser in structure, and the wheel hub with high plasticity, high anti-fatigue performance and high density is obtained.

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.

A high-performance organic fibre brake pad comprises the following components according to weight percentages: 5-9% of cashew nut oil friction powder, 4-8% of chromite, 7-10% of barite, 4-7% of calcined petroleum coke, 3-7% of crystalline flake graphite, 3-6% of sepiolite fibre, 4-7% of ceramic fibre, 1.5-3% of antimony sulphide, 4-7% of red copper fibre, 3-5% of glued aluminium silicate fibre, 1-2% of alumina fibre, 8-11% of vermiculite powder, 9-13% of organosilicone phenol-formaldehyde resin, 1-2% of carbon fibre, 5-7% of bastose, 1-2.5% of wood pulp cellulose, 3-6% of viscose fibre, 6-9% of bamboo carbon fibre, 3-5% of nitrile rubber and 0.3-0.5% of zinc oxide. The invention has the advantages of light weight, strong wear resistance, good flexibility, low noise and long service life, and the like, and the friction performance is stable at operating temperature between 100 DEG C and 450 DEG C.

A micro-copper-formulated ceramic brake pad is made with aramid pulp, carbon fiber, magnesium hydroxide, copper fiber, brown fused alumina, antimony sulfide, ceramic fiber, superfine iron oxide powder, calcium sulfate whisker, potassium titanate, barite, crystalline flake graphite, calcined petroleum coke, nano hollow float beads, flake aluminum powder, nitrile butadiene rubber powder, cashew nut shell oil modified phenolic resin, zirconite, boron nitride, zinc oxide, and benzoxazine resin. The components are reasonably matched, and advantages of the materials can be given to full play in abrasive materials. The novel fiber materials are reasonably composited, performance defects of the materials can be mutually complemented, and high performance is achieved through mutual connective action. The micro-copper-formulated ceramic brake pad has low content of heavy metals and smaller than 0.5% of copper content and therefore, is very environment friendly.

The invention belongs to the technical field of designing and manufacturing of coal mine underground trackless auxiliary equipment, and particularly relates to a totally-closed power transmission device used for a coal mine explosion-proof electric rubber-wheel vehicle. The device comprises a wheel edge transmission speed reduction mechanism, a travel braking mechanism and a parking braking mechanism; the wheel edge transmission speed reduction mechanism is connected with an explosion-proof motor through a coupler, the wheel edge transmission speed reduction mechanism is connected with the travel braking mechanism and the parking braking mechanism, an output shaft of the explosion-proof motor, the coupler, the transmission speed reduction mechanism, the travel braking mechanism and the parking braking mechanism are longitudinally connected in series and fixed and are located on the same central axis, the totally-closed modular combined integrated design is adopted, and the device has the beneficial effects of being compact in structure, convenient to dismount, mount and maintain, pollution-resisting, reliable in explosion-proof property, stable in property, energy-saving, environment-friendly, good in braking cooling effect and the like, and the traveling safety of the rubber-wheel vehicle can be improved.

The invention discloses a positioning sleeve part for a spindle brake device of a braider. The positioning sleeve part comprises a positioning sleeve, a regulation seat, a steel wire torsion spring, a push-pull piece and a roller, wherein a through hole in the middle part of the positioning sleeve and an outer wall of the positioning sleeve are not positioned on the same axis; a positioning sleeve convex ring is arranged at the lower end of the positioning sleeve; the positioning sleeve convex ring and the through hole in the middle part of the positioning sleeve are positioned on the same axis; the positioning sleeve convex ring is arranged on a pit in the upper end of the regulation seat; a bayonet is formed in the upper end face of the positioning sleeve, and is used for accommodating a steel coil torsion spring cross arm; the roller is fixedly arranged on the outer wall of the positioning sleeve; the regulation seat is a circular ring, and a bayonet is formed in the inner wall of the regulation seat, and is used for accommodating a steel coil torsion spring vertical arm; the regulation seat is fixedly arranged on a convex column of a rack through a screw; through holes are formed in the walls of steel wire torsion spring seats, and are used for accommodating an upper arm or a lower arm of the steel wire torsion spring to fix the steel wire torsion spring seat on the rack; through holes are formed in the two ends of the push-pull piece; one end of the push-pull piece is fixedly arranged on the steel wire torsion spring, and the other end of the push-pull piece is fixedly arranged on the positioning sleeve. The positioning sleeve part has the advantage that the spindle brake is more sensitive, and is more convenient to regulate.

The invention discloses a novel automobile brake device. The novel automobile brake device comprises a front wheel, a rear wheel and a main oil cylinder and is characterized in that the transverse piston of the main oil cylinder is hinged to a brake bottom rod through an L-shaped piston rod, and the brake bottom rod is provided with a pedal; the main oil cylinder is filled with brake and connectedwith a front wheel oil cylinder and a rear wheel oil cylinder through pipelines; a second piston rod is fixed to the second piston of the front wheel oil cylinder, the second piston rod are connectedto two symmetrical arc-shaped front brake pads, a circle of front brake drum is arranged outside the front brake pads, the two front brake pads are hinged to the second piston rod, a plurality of outwardly-radial springs are connected between each front brake pad and a protruding standing column in the middle of the second piston rod, and the front wheel is arranged outside the front brake drum.The novel automobile brake device is good in brake effect, and force needed for braking is small.

The invention discloses an actuating expanding device for an automobile drum brake and the drum brake comprising the actuating expanding device, and belongs to the production field of brakes. The actuating expanding device is characterized in that two radial deep grooves which are symmetrically distributed are formed in the head end of a centre driving shaft, an axial concave arc face is formed in the bottom of each groove, a connecting rod is inserted and connected into each radial deep groove, the two ends of each connecting rod are both convex arc faces, one end of each connecting rod is in sliding fit with the corresponding axial concave arc face, the outer side of the head end of the center driving shaft is sleeved with a guiding part which is fixedly arranged, the two ends of the guiding part are respectively provided with a round guiding hole, a top rod in sliding fit with each round guiding hole is arranged in each round guiding hole, one end of each top rod is a concave arc face and in sliding fit with the convex arc faces at the outer ends of the connecting rods, and the other end of each top rod is convex arc face. A stress arc face is machined at the top end of a brake shoe of the brake and in sliding fit with the top rods. Compared with the prior art, the actuating expanding device is large in expanding angle and flexible in expanding and returning; the drum brake has the advantages of being stable in braking, short in braking distance and the like.

The invention discloses an electric control brake system used for a trailer. The electric control brake system comprises an electric control unit (1), a brake signal detection unit (2), a brake execution mechanism (3) and a power source (4). The signal input end of the electric control unit (1) is connected with the signal output end of the brake signal detection unit (2), the signal output end ofthe electric control unit (1) is connected with the signal input end of the brake execution mechanism (3), and the power source (4) is connected with the power input ends of the electric control unit(1) and the brake execution mechanism (3). The electric control brake system is sensitive in braking and stable in brake direction, brake sideslips are unlikely to happen, no braking is conducted inthe trailer backing process, and the braking characteristic is adjustable.

The invention discloses a novel fiber copper-free composition for an automobile brake pad, application and a preparation method thereof, and relates to the technical field of automobile brake pad preparation. According to the novel fiber copper-free composition for the automobile brake pad, aluminum fibers, kaolin, butyronitrile phenolic resin and amorphous graphite are used cooperatively. According to the novel fiber copper-free composition for the automobile brake pad, the aluminum fibers are added in a brake pad formula, and the aluminum fiber has high heat conductivity, so that friction heat produced during a braking process can be remarkably conducted, and the occurrence of a heat fading phenomenon is avoided.

The invention provides a borate type synthetic brake fluid with ultralow low-temperature viscosity. The borate type synthetic brake fluid consists of triethylene glycol monomethyl ether borate, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, an antioxidant, a corrosion inhibitor and a pH value regulator. The invention also provides a preparation method of the borate type synthetic brake fluid with ultralow low-temperature viscosity. According to the invention, the lower limit of low-temperature fluidity of an existing borate type brake fluid is broken through; meanwhile, Class6 in International Standard ISO4925:2005 Road vehicles-specification of non-petroleum-base brake fluids for hydraulic systems and HZY6 grade product specification requirements in national standard GB12981-2012 Motor Vehicle Brake Fluids are met, and it can also be guaranteed that braking is sensitive and timely under extremely cold weather conditions; the dry boiling point and the wet boiling point are high and stable, and air resistance is not prone to occurring; the lubricity is good, and the braking is stable; corrosion to metal materials of a brake system is small, swelling to rubber parts is small, and oxidation resistance and thermal stability are excellent.

The invention discloses an environmentally friendly high performance grinding material composition. The composition comprises fused magnesia, fused zirconia, aramid fibers, tyre powder, expanded vermiculite, ceramic fibers, magnetite, multiwalled carbon nanotubes, boron-containing phenolic resin and benzoxazine resin. The composition has the characteristics of environmental friendliness, high temperature heat fading resistance, wear resistance, stable friction coefficient and long service life. Through reasonable matching of a plurality of components, advantages of various materials are fully performed in the friction material. The composition does not contain heavy metal substances and is environmentally friendly.

The invention discloses a high-strength heat-resistant rubber-based composition for automobile brake pads, an application and a preparation method thereof, and relates to the technical field of preparation of automobile brake pads. The formula of the high-strength heat-resistant rubber-based composition for automobile brake pads provided by the invention contains a high-component reinforcing whisker material and a coumarone resin material used in conjunction. The high-strength heat-resistant rubber-based composition for automobile brake pads provided by the invention solves the problem that the high heat generated during the braking process easily causes thermal recession of existing rubber-based brake pads, leading to brake failure and endangering life safety.

The invention relates to a spiral ventilation radiating brake drum which comprises a brake drum body. A brake friction face is arranged in the middle of the brake drum body, 4-10 rows of radiating holes series evenly distributed spirally are formed in the brake friction face, each row of radiating hole series comprises 4-8 radiating holes, and each row of radiating hole series are arranged linearly in the cross section of the brake drum body. The brake drum is light in weight, reduces the steps in the radiating process aspect of the existing brake drum, reduces production cost and greatly improves the braking capability foremost.

The invention discloses an active trailer braking system. The active trailer braking system comprises a 15-core electric connector (1), a connecting member (2), an electric control unit (3), a motor hydraulic system (4) and a storage battery (5); a signal input end of the electric control unit (3) is connected with signal output ends of the connecting member (2) and the 15-core electric connector(1); a signal output end of the electric control unit (3) is connected with a signal input end of the motor hydraulic system (4); a power supply output end of the 15-core electric connector (1) is connected with power supply input ends of the storage battery (5) and the motor hydraulic system (4); and a power supply output end of the storage battery (5) is connected with power supply input ends ofthe electric control unit (3) and the motor hydraulic system (4). The active trailer braking system has the advantages of sensitive braking, no braking during backing and adjustable braking characteristic.

The invention discloses a service brake system for a wheel loader. The system comprises an air compressor, an unloading valve, an air cylinder and a safety valve. The air compressor is connected withthe air cylinder through the unloading valve; the safety valve is arranged on the air cylinder and is used for limiting the highest pressure of the system. The service brake system is characterized byfurther comprising an air brake valve, a relay valve, a brake air chamber and a brake, an outlet of the air cylinder is connected with an air inlet of the air brake valve and an air inlet of the relay valve, an air outlet of the air brake valve is connected with a control air pressure input port of the relay valve, and an air outlet of the relay valve is connected with the brake through the brakeair chamber. The system cancels the brake fluid to thoroughly solve a gasification problem of the brake fluid and improve the safety of the service brake system. The relay valve is used in the system, the position is reasonably arranged, the inflation time of a brake air chamber is shortened, the brake lag time is shortened, and brake is more sensitive.

The invention provides an automatic guide part conveying device. The automatic guide part conveying device comprises a drive system, an anti-collision system, a power supply system, a frame chassis and a center controller. The operating state of the drive system is controlled through the center controller to guarantee stable operation of the device. The drive system comprises four independent drive units and the drive frame chassis. Motors are arranged in the drive units and can independently finish steering and driving. The drive frame chassis finishes part conveying. The power supply system comprises a battery jar, and power supply is achieved through a battery in the battery jar. The anti-collision system comprises a mechanical anti-collision system. The center controller controls the motors arranged in the driving units to slow down for collision prevention, or the mechanical anti-collision system automatically avoids obstacles. As the automatic guide part conveying device monitors the operating states of the four drive units, information is fed back to the center controller for operation of the device through a feedback system, the operating states are determined through processing, positioning is more accurate, vibration is low, and limitation from regions is avoided.

The invention discloses a braking integrated pneumatic motor, belonging to the technical field of pneumatic motors. The pneumatic motor comprises a stator installed in a shell and a rotor eccentrically arranged in the stator, wherein blade grooves are arranged on the rotor; and blades are arranged in the blade grooves in a matching manner and can move in the radial direction. The pneumatic motor is characterized in that an output shaft of the rotor is supported on a front end cover of the shell via bearings 1; the front end of the output shaft extends out of the front end cover; shaft sleevesare arranged at the front end of the output shaft; a section of outer splines are arranged on the output shaft between the front end cover and the shaft sleeves; braking bases are arranged on the outer splines in a matching manner; friction plates are arranged at the rear ends of the braking bases; wedge-shaped grooves are arranged at the front end of the front end cover and are matched with the friction plates; and resetting devices are arranged between the shaft sleeves and the braking bases. The pneumatic motor is sensitive to respond and has good braking effect, high safety property, highlifting speed and compact structure.