Sliding member for chain system, chain guide, chain tensioner and chain system

A sliding piece and chain technology, applied in transmissions, engine components, belts/chains/gears, etc., can solve problems such as large frictional resistance

Inactive Publication Date: 2007-07-11
NISSAN MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyamide resins have the disadvan...

Method used

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  • Sliding member for chain system, chain guide, chain tensioner and chain system
  • Sliding member for chain system, chain guide, chain tensioner and chain system

Examples

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example

[0046] The present invention will be better understood by referring to the following examples compared with comparative examples; but these examples are only for explaining the present invention and not limiting the scope of the present invention.

example 1

[0048] Electron beams (boosted voltage: 2 MeV) were irradiated to the molded powder of tetrafluoroethylene at an irradiation dose of 100 kGy in an environment having an oxygen partial pressure of 133 Pa and a nitrogen partial pressure of 106657 Pa under heating conditions of 350° C. (available from Asahi Glass Co., Ltd. under the trade designation G163), thereby improving the molding powder of tetrafluoroethylene. Thereafter, the modified molding powder was pulverized with a jet mill to have an average particle size of 25 μm, thereby obtaining a modified tetrafluoroethylene powder.

[0049] Subsequently, 20 parts by weight of the above-mentioned improved tetrafluoroethylene powder and 80 parts by weight of PA (polyamide) 66 resin (available from Asahi Kasei Chemicals Co., Ltd. under the trade name Leona 1402) with a number average molecular weight of 20000 Mix together to form a mixture. The mixture was injected into a twin-screw extruder through a feed hopper to complete gra...

example 2

[0053] 20 parts by weight of the improved tetrafluoroethylene powder in Example 1 and 80 parts by weight of PA (polyamide) 66 resin (available from Asahi Kasei Chemicals Co., Ltd. under the trade name Leona1402) with a number average molecular weight of 20000 Mix to form a mixture. The mixture was injected into a twin-screw extruder through a feed hopper to complete granulation so as to produce pellets, wherein the temperature of the twin-screw extruder was set at 290° C. and the rotation speed of the screw was 300 rpm.

[0054] Subsequently, the pellets formed by the twin-screw extruder were subjected to injection molding under the same conditions as in Example 1, whereby a slider (sample) of this example was obtained.

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Abstract

The invention discloses a sliding part of a chain system, a chain guiding device, a tensioning device and a chain system. The slide is used in a chain system of a vehicle internal combustion engine; the chain guide comprises a base material with a slide provided with a slide for the chain system; the chain tensioner comprises a base material with a slide provided with a A slider for a chain system; the chain system includes a slider and a chain for the chain system, the slider and the chain being in sliding contact with each other in the presence of a lubricant. The sliding part is made of resin composition, and the resin composition includes: matrix resin, which is a thermoplastic resin with a number average molecular weight of not less than 20,000; fluororesin, whose amount accounts for 5% of the total amount of the resin composition by mass. -40%, the fluororesin has a surface energy of 200-400μN/cm and a visible light transmission coefficient of not less than 10% at a wavelength of 600nm.

Description

technical field [0001] The present invention relates to a sliding member of a chain system, a chain guide, a chain tensioner and an improvement of the chain system, and more particularly, to a sliding member formed of a resin composition and applied to a chain system, and a sliding chain guides, chain tensioners and chain systems. Background technique [0002] In recent years, the application of thermoplastic resins to sliding parts such as bearings, rollers, gears, etc. has also been progressing from the standpoint of reducing sliding noise, reducing weight, and providing no lubrication to sliding parts, in which environments where plastic sliding materials are used (such as applied bearing pressure and operating temperature) become increasingly harsh. [0003] In particular, base members of gears, sprockets and chain guides used in internal combustion engines of vehicles are required to have good sliding properties, good heat resistance at a temperature of not lower than ...

Claims

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Application Information

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IPC IPC(8): C08L101/12C08L77/00F16H7/08F16H7/18C08L27/18
CPCC10N2220/021C10M2205/0225F16H7/18C10N2220/02F16H2007/0872C10N2240/52C10M2217/0425C10M2209/1023C10M2221/0405C10N2240/10C08L77/06C08L77/00C10M2213/0623F16C33/201C08L27/12C10M2209/1003C10N2230/06C10M2217/0443C10N2250/08C08L77/02C10M2205/0245C10M111/04C10N2020/04C10N2030/06C10N2040/25C10N2050/08C10N2020/01C10N2040/38F16C2361/63C08L2666/04
Inventor 太田智仁熊谷宏谷合宏之田村雅之山口定彦草野广男山本康彰
Owner NISSAN MOTOR CO LTD
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