Patent EA-012012-B1 (EA)
Title: Disk brake shoe
Inventor: TEMNIKOV FEDOR SERAFIMOVICH
IPC: F16D69/00
Filed: 2008-08-19
Abstract: The invention relates to railway transport, mainly to brake equipment, in particular to disk brakes for use mainly at rolling stock. The disk brake shoe comprises a frame and rigidly connected thereto a friction element, so that the frame material envelopes outer lateral walls and the friction element surface adjoining thereto. Adjusting eye rings are arranged on the frame back side. The friction element consists of 1-4 inserts, they may be one-piece or composite, the solid inserts are arranged in frame chambers and embodied as truncated pyramids with a base as a trapezium or polygon developed by their lesser base to the brake shoe working surface, with inclination of lateral walls α=10-15°, forming connection “dovetail” with the frame chambers. Composite inserts are composed of parts are arranged in frame chambers and embodied as truncated pyramids or cones with a base as a trapezium or polygon developed by their lesser base to the brake shoe working surface, with inclination of lateral walls α=10-15°, forming connection “dovetail” with the frame chambers. The frame material embraces additionally the inner lateral walls of solid inserts or the inner lateral walls of composite inserts. Windows are provided in the outer lateral frame wells, at least one from both side opposite each insert, and the inserts have projections corresponding to the windows. Thermal resistant elastic damping sleeves are disposed in the adjusting eye rings. For producing a disk brake shoe, solid or composite inserts of the friction element are mould by cast iron, steel or alloy melt with hardness not exceeding 255 HB. The disk brake shoe solid or composite inserts are produced from materials selected from: minerals – carbides, silicides; metals and alloys thereof; polymers with fillers – coal plastic, fluoroplast; metal ceramics. The solid or composite inserts of the friction element is produced by casting or pressing with subsequent molding with subsequent caking. The brake frame is cast or composite welded with chambers for one-piece inserts or with chambers separated to cells for composite inserts, the chambers or cells are filled with composite filling agent which is pressed and caked forming one-piece inserts or parts of composite inserts monolithically connected to the frame. The brake frame is cast or composite welded with chambers for one-piece inserts or with chambers separated to cells for composite inserts, the chambers or cells are filled with composite filling agent hardening after a chemical reaction which is further pressed and caked forming one-piece inserts or parts of composite inserts monolithically connected to the frame. Bottom parts of the composite inserts are embodied as a truncated cone and can have a geometrical view selected from a circle and ellipse. Bottom parts of the composite inserts are embodied as a truncated pyramid and can have a geometrical view selected from a triangle, quadrangle, pentagon, hexagon. The area of the friction element comprises at least 92% of the brake working surface area. A totality of the invention essential features provides for embodiment of the brake shoe having highly-thermal resistant properties for use in high-speed transport means, having increased operation life time, reliability, mechanical strength due to a principle change of shoe design and increase of fixing strength of inserts or parts thereof using the “dovetail” connection. Use of thermal-resistant elastic damping sleeves provides a smooth travel of the brake shoe during braking and interacting with wheels conjugate surface, thus excluding vibration, abrupt interconnection of friction surfaces causing cracks formation, roughening and destroy. Smooth touch also provides noise reduction. Possibility of brake shoe manufacturing using different technologies of production and materials permits to improve their quality and vary technical features of brake shoes depending upon specific operation conditions at different rolling stocks.