Patent application number | Description | Published |
20080196995 | Grease Composition, Grease-Enclosed Bearing, and Rotation-Transmitting Apparatus With Built-In One Way Clutch - The present invention provides a grease composition capable of effectively preventing a rolling surface of a bearing from having hydrogen brittleness-caused peeling, a grease-enclosed bearing in which the grease composition is enclosed, and a rotation-transmitting apparatus with a built-in one-way clutch in which the grease composition is enclosed at a sliding portion. The grease composition contains a base grease consisting of a base oil and a thickener; and an additive added to the base grease. The grease composition prevents a frictional wear surface of the sliding portion or a newly generated surface consisting of iron or the like exposed owing to wear from being peeled owing to hydrogen brittleness. The additive contains a bismuth-based additive or a magnesium-based additive. The bismuth-based additive consists of at least one of inorganic bismuth and organic bismuth not containing a sulfur component. The magnesium-based additive consists of at least one of inorganic magnesium and organic magnesium. The grease-enclosed bearing encloses the above-described grease composition. | 08-21-2008 |
20090005272 | Grease Composition, Grease-Enclosed Bearing, and One-Way Clutch - The present invention provides a grease composition capable of effectively preventing a rolling surface from having hydrogen brittleness-caused peeling, a grease-enclosed bearing in which the grease composition is enclosed, and a one-way clutch in which the grease composition is enclosed at a sliding portion. The grease composition contains a base grease consisting of a base oil and a thickener and an additive added to the base grease. The grease composition is capable of preventing hydrogen brittleness-caused peeling from occurring on a frictionally worn surface of a bearing portion containing an iron-based metal material or a newly generated surface consisting of the iron-based metal material exposed owing to wear. The additive contains at least one aluminum-based additive selected from among an aluminum powder and inorganic aluminum compounds. The mixing ratio of the aluminum-based additive to 100 parts by weight of the base grease is set to 0.05 to 10 parts by weight. | 01-01-2009 |
20090124400 | Rotation-transmitting apparatus with built-in one-way clutch - The present invention provides a rotation-transmitting apparatus with a built-in one-way clutch which is capable of preventing rolling contact surfaces and rolling surfaces of inner and outer rings of a rolling bearing from peeling and fretting wearing and is excellent in its resistance to heat and wear. The rotation-transmitting apparatus with a built-in one-way clutch has an inside rotational member; a cylindrical outside rotational member disposed concentrically with the inside rotational member; a one-way clutch connecting the outside surface of the inside rotational member and the inside surface of the outside rotational member to each other only when the outside rotational member rotates at a higher speed than the inside rotational member; and a pair of rolling bearings allowing the inside rotational member and the outside rotational member to rotate relative to each other. Grease is enclosed inside an internal space of a clutch where a plurality of rollers is mounted and inside a space of the bearing where a plurality of rolling elements is mounted. The grease contains a base oil, a thickener, and an additive. The base oil is PAO oil. As the additive, 0.01 to 15 wt % of at leas one compound selected from among ZnDTC and ZnDTP is contained for the entire amount of the grease. | 05-14-2009 |
20090279824 | GREASE-ENCLOSED BEARING FOR INVERTER-DRIVING MOTOR - The present invention provides a grease-enclosed bearing, for an inverter-driving motor, which is inexpensive and capable of effectively restraining damage from being generated by electrolytic corrosion. The grease-enclosed bearing for the inverter-driving motor has an inner ring ( | 11-12-2009 |
20100092118 | GREASE COMPOSITION AND GREASE-ENCLOSED BEARING - The present invention provides a grease composition capable of effectively preventing a rolling surface of a grease-enclosed bearing from having hydrogen brittleness-caused peeling and the grease-enclosed bearing. The grease composition includes a base grease consisting of a base oil and a thickener and an additive added to the base grease. The additive contains at least an epoxy compound. A mixing ratio of the epoxy compound to 100 parts by weight of the base grease is set to 0.05 to 10 parts by weight. The grease-enclosed bearing using the grease composition includes an inner ring ( | 04-15-2010 |
20100220943 | ROLLING BEARING AND SEAL FOR ROLLING BEARING - It is an object of the present invention to provide a rolling bearing in which efficacy provided by an auxiliary agent for grease can be maintained for a long time to extend its life and a seal for the rolling bearing. A rolling bearing ( | 09-02-2010 |
20110207535 | Grease, rolling bearing, constant velocity joint, and rolling parts - The present invention provides grease which prevents frictional wear on a lubricating surface and excellent in performance of preventing occurrence of flaking, heat-resistant performance, and long-term durability, a grease-enclosed rolling bearing, a constant velocity joint, and rolling parts. Grease is composed of base grease, essentially containing a thickener, to which at least 0.01 to 15 wt % of one substance selected from among bismuth and inorganic bismuth compounds is added. The inorganic bismuth compounds are at least one inorganic bismuth selected from among bismuth sulfate, bismuth trioxide, bismuth carbonate, and sodium bismuthate. The above-described grease is used for the rolling bearing and the constant velocity joint. A coating film of at least one substance selected from among the bismuth and the inorganic bismuth is formed on surfaces of the rolling parts. | 08-25-2011 |
20110306429 | GREASE COMPOSITION, GREASE-PACKED BEARING, UNIVERSAL JOINT FOR PROPELLER SHAFT, LUBRICATING OIL COMPOSITION, AND OIL-IMPREGNATED SINTERED BEARING - The present invention provides a grease composition or a lubricating oil composition which is capable of effectively preventing hydrogen brittleness-caused peeling from occurring on a rolling surface of a rolling bearing, is excellent in durability in a high temperature and speed operation, and can be used for a long time. A grease-packed bearing ( | 12-15-2011 |
20110311173 | Rolling bearing - The present invention provides a rolling bearing which is excellent in high-temperatures and high-speed durability and quietness, is capable of effectively preventing hydrogen brittleness-caused peeling from occurring on a rolling surface thereof, and has a low environmental load. A rolling bearing ( | 12-22-2011 |
20120149614 | Grease, rolling bearing, constant velocity joint, and rolling parts - The present invention provides grease which prevents frictional wear on a lubricating surface and excellent in performance of preventing occurrence of flaking, heat-resistant performance, and long-term durability, a grease-enclosed rolling bearing, a constant velocity joint, and rolling parts. Grease is composed of base grease, essentially containing a thickener, to which at least 0.01 to 15 wt % of one substance selected from among bismuth and inorganic bismuth compounds is added. The inorganic bismuth compounds are at least one inorganic bismuth selected from among bismuth sulfate, bismuth trioxide, bismuth carbonate, and sodium bismuthate. The above-described grease is used for the rolling bearing and the constant velocity joint. A coating film of at least one substance selected from among the bismuth and the inorganic bismuth is formed on surfaces of the rolling parts. | 06-14-2012 |
20130170777 | GREASE COMPOSITION AND ROLLING BEARING - The present invention provides a grease composition having an excellent fretting wear resistance in a wide temperature region from low to high temperatures and particularly even at low temperatures and a rolling bearing in which the grease composition is packed. A grease composition ( | 07-04-2013 |