To provide a multi-layer slide member comprising a coating layer of a synthetic resin composition having a minimum difference between a coefficient of static friction and a coefficient of dynamic friction, and a rack-and-pinion steering device capable of securing a smooth steering feeling.SOLUTION: A multi-layer slide member 1 includes: a back metal 2 made of a steel plate; a coating 4 of copper plating or nickel plating formed on one surface 3 of the back metal 2; a porous metal sintered layer 5 joined integrally to the surface 3 of the back metal 2 via the coating 4; and a coating layer 8 formed of a synthetic resin composition filling pores 6 of the porous metal sintered layer 5 and covering a surface 7. The synthetic resin composition contains PTFE as a principal component, and further contains, as additives, 5-30 mass% of a thermotropic liquid crystal polymer, 5-12 mass% of polyaryl ketone resin, 5-12 mass% of molten fluororesin, and 1-5 mass% of polyimide resin.SELECTED DRAWING: Figure 1
【課題】静止摩擦係数と動摩擦係数との差が極力小さい合成樹脂組成物の被覆層を備えた複層摺動部材及び円滑な操舵感を確保できるラックピニオン式舵取装置を提供すること。【解決手段】複層摺動部材1は、鋼板からなる裏金2と、該裏金2の一方の表面3に形成された銅メッキ又はニッケルメッキの皮膜4と、皮膜4を介して裏金2の表面3に一体的に接合された多孔質金属焼結層5と、該多孔質金属焼結層5の孔隙6を充填しかつ表面7を被覆した合成樹脂組成物からなる被覆層8とを含んでおり、合成樹脂組成物は、主成分のPTFEに加えて、添加剤としてサーモトロピック型の液晶高分子5〜30質量%とポリアリールケトン樹脂5〜12質量%と溶融フッ素樹脂5〜12質量%とポリイミド樹脂1〜5質量%とを含有している。【選択図】図1
MULTI-LAYER SLIDE MEMBER AND VEHICULAR RACK-AND-PINION STEERING DEVICE USING THE SAME
複層摺動部材及びそれを用いた自動車のラックピニオン式舵取装置
2020-03-26
Patent
Elektronische Ressource
Japanisch
IPC: | F16C SHAFTS , Wellen / B62D MOTOR VEHICLES , Motorfahrzeuge / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / F16H Getriebe , GEARING |
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