Grease composition and grease-filled wheel bearing

A grease composition and a technology for wheel bearings, which are applied in the field of wheel bearings, can solve the problems of insufficient fretting wear and wear suppression, and achieve the effects of low torque, long lubrication life, and fretting wear and wear suppression.

Active Publication Date: 2016-11-09
KYODO YUSHI CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the suppression of fretting wear under harsher conditions than before (low temperature: -30°C, amplitude: extremely small) is insufficient, and further improvement in fretting wear is required compared to the above-mentioned conventional technologies.

Method used

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  • Grease composition and grease-filled wheel bearing
  • Grease composition and grease-filled wheel bearing
  • Grease composition and grease-filled wheel bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] Preparation of Test Grease

[0080] Grease compositions of Examples and Comparative Examples were prepared using thickeners and base oils shown in the following tables. Specifically, diphenylmethane diisocyanate (1 mole) was reacted with a predetermined amine (2 moles) in the following base oil, and after heating and cooling, three-roll rolling was carried out to measure the working penetration (test method JIS K2220 7.) The grease composition of Examples 1-11 and Comparative Examples 1-9 was obtained so that it may become 280. In addition, the kinematic viscosity of the base oil at 40 degreeC is measured according to JISK222023. In Table 1 and Table 2, the value of mass % represents the ratio relative to the total mass of the grease composition. The remainder is base oil. In Table 1 and Table 2, the weight ratio wt% of mineral oil represents the ratio of mineral oil to the total amount of mineral oil and synthetic hydrocarbon oil, and the weight ratio wt% of synthet...

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Abstract

The present invention provides a grease composition for wheel bearings, which contains (a) a base oil which consists of a mineral oil and a synthetic hydrocarbon oil, in which the ratio of the synthetic hydrocarbon oil to the total quantity of the mineral oil and the synthetic hydrocarbon oil is 40-60 mass %, and in which the kinematic viscosity of the mixed oil at 40 DEG C is 40-65 mm2 / s, (b) a thickening agent represented by formula (A), (c) an amine-based antioxidant and (d) an amine phosphate-based wear prevention agent (in the formula, R2 denotes a diphenylmethane group. R1 and R3 may be the same or different and each denote a cyclohexyl group or a straight chain or branched chain alkyl group having 16-20 carbon atoms {the value of (number of cyclohexyl groups) / (number of cyclohexyl groups + number of alkyl groups)} * 100 is 50-90 mol.%).

Description

technical field [0001] The present invention relates to a grease composition encapsulated in a bearing for a wheel that satisfies low torque performance, has a long peeling life and a long lubrication life even at high temperatures, and is excellent in fretting resistance at low temperatures, and the grease encapsulated therein A composite wheel bearing. Background technique [0002] In recent years, from the viewpoint of reducing power consumption, electrical equipment and mechanical parts used in various industries including automobiles have been required to increase efficiency, and various researches such as weight reduction and structural improvement of parts have been conducted. As one of the methods of improving the efficiency of automobiles, there is a method of reducing the torque of the wheel bearings used in automobile wheels, and the grease used is similarly used at a wide temperature range from low temperature to high temperature. Keeping torque low in the range...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M101/02C10M105/02C10M107/02C10M115/08C10M129/28C10M133/12C10M135/10C10M135/18C10M137/08F16C19/08F16C33/66C10N10/04C10N30/00C10N40/02C10N50/10
CPCF16C19/186F16C2326/02C10M169/06C10M2205/0206C10M2205/0285C10M2215/064F16C33/6633C10M2203/1006C10M2215/02C10M2215/1026C10M2219/044C10M2219/068C10M2223/043C10N2020/02C10N2030/06C10N2030/02C10N2050/10C10N2010/04C10N2030/10C10N2030/12C10M135/10C10M135/18C10M137/08C10M101/02C10M115/08C10M105/04C10M133/04C10M2203/003
Inventor 佐藤雄太筒井大介今井淳一平野慎介
Owner KYODO YUSHI CO LTD
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