33results about How to "Soft braking" patented technology

The invention discloses a ceramic-based friction material and a method for preparing the same. The ceramic-based friction material consists of the following raw materials in part by weight: 6 to 8 parts of thermal plasticity phenolic resin or modifier thereof, 7 to 8 parts of potassium titanate whisker, 5 to 6 parts of attapulgite clay, 3 to 4 parts of expanded vermiculite, 4 to 5 parts of butyronitrile rubber powder, 4 to 5 parts of chromite powder, 12 to 13 parts of ceramic fiber, 3 to 4 parts of powdered coke, 14 to 15 parts of barium sulfate, 5 to 6 parts of artificial graphite, 9 to 10 parts of scale graphite, 7 to 8 parts of organic rubbing powder, 3 to 4 parts of sericite, 0.5 to 1 part of aluminum oxide, 3 to 4 parts of copper fiber, 3 to 4 parts of coloring agent and 0.5 to 1 part of organic fiber. The preparation method comprises the following steps of: material blending, cold press moulding, hot press moulding, polishing and curing treatment. The ceramic-based friction material has the advantages of high and stable frictional property, suitable frictional coefficient, low wear rate, low hardness, no damage to friction coupling materials, low braking noise, and extremelylow environmental pollution; and in use, the ceramic-based friction material has the advantages of smooth braking, gentleness, comfortability, safety and reliability.

The invention discloses a coaxial type hydraulic retarding braking device, which comprises a transmission shaft, a pulling fork, a positioning mechanism, a clutch assembly, an oil pump rotor, an oil pump casing and an oil pressure control system, wherein the oil pump rotor is born on the transmission shaft through a bearing, a clutch inner sleeve is born on the transmission shaft through a sliding spline in a matching way, a clutch outer sleeve is fixedly connected onto the oil pump rotor for realizing the clutching of the transmission shaft and the rotor, and the oil pump casing is connectedonto a machine frame through screw bolts. The coaxial type hydraulic retarding braking device has the advantages that the size is compact, the weight is light, the energy is saved, the reliability isrealized, and the service life is long. The braking device is convenient to install and refit, the braking force is not attenuated after long-time work, no power consumption is generated during no work, the safety factor is improved, the braking is mild and smooth, no collision is caused, and the coaxial type hydraulic retarding braking device is suitable for vehicle braking, is also suitable forhydraulic motor driving and can also be used for deep wells, deep seas, tool and substance hanging and conveying and the like.

The invention relates to a copper-less and asbestos-free organic friction material, which is composed of the following components in parts by weight: 10-15 parts of bonding material, 45-55 parts of filling material, 20-30 parts of fiber material, and 2-30 parts of acid-base adjustment material. 4 parts, 5-15 parts of metal fiber or metal powder, wherein the fiber material contains nano-boron fiber or basalt fiber, and the metal fiber or metal powder is one or more of titanium, aluminum, heat-resistant duralumin, copper and brass A combination, and the copper content is less than 5%. The present invention reduces the amount of red copper and brass in the friction material formula and strictly selects the added metal components as titanium, aluminum and heat-resistant duralumin. The stable friction coefficient of the material makes the braking process soft, smooth and comfortable. It can also overcome the instability of the friction coefficient of commercially available high-copper organic friction materials under high-speed and low-temperature conditions, and effectively reduce the aggressiveness of the friction couple.

The invention provides a zirconium oxide modified novel high temperature resistant ceramic car disc brake pad and a preparation method of the brake pad. The brake pad is prepared by the following steps: mixing barium sulfate, red copper fiber, ceramic fiber, zirconium oxide, synthetic graphite, antimony trisulfide, aramid fiber, mica powder, frictional powder, phenolic resin, light calcium carbonate and rubber powder, and putting the mixture into an oven with 70 DEG C to form mixed surface material; preparing steel fiber, synthetic graphite, flake graphite, petroleum coke powder, blanc fixe, porous iron powder, phenolic resin, light magnesium oxide, rubber powder and wollastonite into mixed backing material in the same way; pre-pressing and molding the mixed backing material, the mixed surface material and steel backing on a cold-pressing molding machine, then putting the product into a hot-pressing molding mould, and carrying out hot-pressing molding; after that, putting the product into a heat treatment oven, and carrying out heat treatment; and grinding the surface of the product, processing by other existing steps, and packaging. The zirconium oxide modified novel high temperature resistant ceramic car disc brake pad is free from heat fade, stable in friction coefficient, good in friction performance, stable in brake, sensitive and reliable, low in hardness and low in wear rate.

The invention relates to a little-copper and asbestos-free organic friction material for transmission braking. The little-copper and asbestos-free organic friction material consists of the following components: a bonding material, a filling material, a fiber material, an acid-base adjusting material, metal fiber or metal powder, wherein the metal fiber or metal powder is a combination of titanium, aluminum, heat-resistant hard aluminum, red copper and brass, the copper content is less than 5% and comprises spiral microfiber. The used amounts of red copper and brass are reduced, and the metal components are strictly selected and added as titanium, aluminum and heat-resistant hard aluminum, so that the wear of a product is reduced, and a stable friction coefficient and heat resistance are ensured. Also, the spiral micro-carbon fiber is contained, on one hand, a filling and reinforcing role can be played, the inherent vibration rate of the product is improved, and the noise is reduced; on the other hand, the spiral micro-carbon fiber is of a spiral spring type structure, so that the elastic modulus and hardness of the product are reduced, the adhesion among the various components is improved, the strength and toughness of the product are improved, the stability of the friction coefficient of the product is improved, the deterioration of heat resistance is avoided and the aggressiveness to friction duality can be effectively reduced.