The present disclosure relates to a fiber-reinforced copper-based brake pad for high-speed railway train, and preparation and friction braking performance thereof. The fiber-reinforced copper-based brake pad for high-speed railway train comprises 80-98.5 wt. % metal powder, 1-15 wt. % non-metal powder and 0.5-5 wt. % fiber component. In addition, some components are added in a specific proportion to achieve optimal performance. The copper-based powder metallurgy brake pad is obtained by powder mixing, cold-pressing and sintering with constant pressure. The friction braking performance of the obtained brake pad is tested according to a braking procedure consisting of three stages, i.e., the first stage with low-pressure and low-speed, the second stage with high-pressure high-speed and the continuous emergency braking third stage with high-pressure and high-speed. The brake pad has advantages including higher and more stable friction coefficient, higher fade and wear resistance and slighter damage to brake disc at high speeds.

A brake assembly for use in a disc brake mechanism of a vehicle. The brake assembly includes an aluminum ceramic composite rotor connected to a central aluminum hub. The rotor includes projections extending radially inward toward the hub and engaging with through holes in the hub. The projections extend through the through holes to connect the rotor to the hub. The engagement between the projections and the through holes allows for radial movement of the projections relative to the through holes, which radial movement may be caused by thermal expansion of the rotor from heat generated during a breaking operation.

A friction pad body having a backing part and a friction part, which integrally consist of the same ceramic material, without a seam and joint. The ceramic material has a purity of at least 80% in relation to the total weight of the friction pad body. The friction pad body is preferably produced in the form of a sintered body by isostatic pressing so that a single-stage production process can be achieved.

A sintered friction material includes a copper component in an amount of 0.5% by mass or less, a titanate as a matrix, a ceramic material, and a lubricant. A method for manufacturing a sintered friction material includes a step of mixing raw materials including a titanate for forming a matrix, a step of molding the raw materials, and a step of sintering a molded body molded in the molding step. In the method, a sintering temperature in the sintering step is 900 C. to 1300 C.

This invention relates to a paper friction material and a method of manufacturing the same, wherein the paper friction material is configured such that dispersibility and bondability are increased between a filler and a matrix. The paper friction material which is suitable for use in a vehicle, includes a friction base including pulp and a coating layer formed on the friction base using a mixture of latex and a functional material. The OH reactive group of the pulp and the aromatic ring of the latex are hydrogen-bonded so that the friction base and the coating layer are coupled with each other.

Provided are a yaw brake pad and a method of producing the same, which relate to the technical field of friction material. The yaw brake pad is prepared from, by weight, the following main ingredients: 70-75 parts of polyether ether ketone, 10-20 parts of carbon fiber, 3-5 parts of glass fiber and 3-5 of graphite. It alleviates the technical problem that the metal-based friction materials generally for producing current international and domestic yaw brake pads are likely to rust, harmful to dual discs, and produce screechy. It has not only significantly improved mechanical properties and high temperature tolerance, much lower hardness, less wear to dual discs, and lower noise, but also improved friction stability and adaptability to working conditions, and thus can effectively satisfy the demand of the wind driven generator for yaw braking at a low speed.

A locking mechanism capable of locking and unlocking the rotation of the rotor shaft of an electric motor is constituted by a plurality of recesses formed in one side surface of one gear of a plurality of gears of a reduction gear mechanism. A locking pin is movable toward and away from the recesses, and is configured such that when the locking pin moves toward the recesses, the locking pin engages in one of the recesses and locks the one gear. A linear solenoid is configured to move the locking pin toward and away from the recesses, and a protrusion extends from one end surface of each recess.

A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with low environmental load and with excellent friction coefficient, anti-crack properties, and abrasion resistance compared with conventional ones. Furthermore, a frictional material and a friction member formed by using this non-asbestos frictional material composition are provided. The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material, includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; cashew dust in a content of 1.5-4.5 mass % as the organic filler; zirconium oxide with a particle size of 30 m or less in a content of 30-45 mass % but not containing zirconium oxide with a particle size of more than 30 m as the inorganic filler.

A friction material composition of the present invention includes a fibrous base, a friction regulator, and a binder and has a copper content of 0.5 mass % or less in terms of copper element amount. The friction material composition contains regenerated cellulosic fibers as the fibrous base. In an embodiment of the friction material composition, the regenerated cellulose fiber has a fiber length of 2 mm to 20 mm.

The present invention is concerned with a frictional material composition not containing copper as an element or having the content of copper of 0.5 mass % or less, the composition containing a cashew dust; (A) potassium titanate; (B) one or more selected from the group consisting of lithium potassium titanate and magnesium potassium titanate; and (C) one or more selected from the group consisting of zirconium silicate, zirconium oxide, and magnesium oxide, wherein the content of the cashew dust is 1 to 10 mass %, and the content of the component (C) is 11 to 30 mass %.