摘要:
A sealing device for a roll bearing which includes an outer ring, an inner ring, a rolling element rotatably interposed between the outer and inner rings, and a retainer, comprises a seal holder having a seal holder portion and a seal body attached to the seal holder portion. A portion of the retainer is received in a sealing space defined by the seal holder portion while the portion of the retainer is being disposed outside a range of interference with the seal holder portion. The sealing device further comprises conical surfaces 10 and 19 which are provided as fitting surfaces of a seal holder portion 9a and a seal body 17 fit to the seal holder portion 9a. Accordingly, a space 23 into which one end of a retainer of the bearing is receivable can be formed, and the inside diameter d of the seal holder portion 9a can be reduced.
摘要:
A formed film is formed on the surface of a metal substrate made of an iron-based metal. Thereafter, the surface of the formed film is subjected to treatment for lessening surface roughness such as rolling. In this arrangement, a member which exhibits a sufficient seizing resistance even after being freed of formed film can be obtained.
摘要:
A formed film is formed on the surface of a metal substrate made of an iron-based metal. Thereafter, the surface of the formed film is subjected to treatment for lessening surface roughness such as rolling. In this arrangement, a member which exhibits a sufficient seizing resistance even after being freed of formed film can be obtained.
摘要:
The refrigerating machine oil of the invention is characterized by comprising an ester of a polyhydric alcohol and fatty acids with a content of a C10-C13 branched fatty acid of 50% by mole or greater. The working fluid composition for a refrigerating machine of the invention is characterized in that the working fluid composition comprises an ester of a polyhydric alcohol and fatty acids with a content of a C10-C13 branched fatty acid of 50% by mole or greater, and a refrigerant.
摘要:
In a toroidal continuously variable transmission unit, a pair of guide surface portions 120, 120 are provided on a trunnion 15 so as to face oppositely each other and to extend in a direction which intersects a rotational center axis of a power roller 11 at right angles and intersects pivot shafts 14 at right angles. When a tangential force along a direction of the pivot shafts 14 is applied to the power roller 11, an outer circumferential surface 110 of an outer ring 28 can be brought into abutment with these guide surface portions 120, 120. By this, the toroidal continuously variable transmission unit with good machinability can be obtained in which the power roller together with the outer ring can be rolling guided smoothly relative to the trunnion by an inexpensive and simple construction while avoiding the offsetting of a shaft portion which supports the power roller.
摘要:
The base oil for the refrigerating machine oil used with a carbon dioxide refrigerant of the invention is characterized by comprising a complete ester of a fatty acid in which the proportion of C14-C22 branched fatty acid is 40-100% by mole and a polyhydric alcohol. The refrigerating machine oil used with a carbon dioxide refrigerant according to the invention is characterized by comprising the base oil for the refrigerating machine oil used with a carbon dioxide refrigerant according to the invention. The base oil for the refrigerating machine oil used with a carbon dioxide refrigerant and the refrigerating machine oil used with a carbon dioxide refrigerant according to the invention, when used together with a carbon dioxide refrigerant, exhibit excellent stability and electrical insulating properties, and have suitable compatibility with refrigerants while allowing adequate lubricity to be exhibited without increasing the viscosity of the base oil.
摘要:
A pair of ball bearings 19, 19 and a roller clutch 20 are provided between the outer peripheral surface of the sleeve 18 fitted and fixed onto the rotating drive shaft of a starter motor and the inner peripheral surface of the pulley element 17 around which an endless belt for starting an engine extends. The roller clutch 20 has a concave section 32 on the inner peripheral surface of the clutch outer ring 30 to define a cam surface 31. After the engine is started, the rollers 33, 33 move toward the bottom of the concave section 32 against the resilient force of the springs 40. And, the rolling contact surface of the rollers 33, 33 is separated from the outer peripheral surface of the clutch inner ring 29. Consequently, the friction heat which would be produced after the engine start is suppressed, and a structure having an excellent durability as a unit for starting the engine of the idling-stop vehicle is realized.
摘要:
A toroidal-type continuously variable transmission has a casing, a rotation shaft, a pair of outer side disks having a side surface, supported on the rotation shaft, and rotating in synchronism with the rotation shaft, an inner side disk having two side surfaces, rotatably supported around a middle portion of the rotation shaft, and rotating relative to the rotation shaft, pluralities of supporting members disposed between the two side surfaces of the inner side disk and the side surfaces of the outer side disks, respectively, and swinging on a pivot shaft disposed so as to be twisted to the rotation shaft, and pluralities of power rollers rotatably supported on the respective supporting members, wherein an outer peripheral face of the inner side disk is provided with a detected portion for detecting rotation of the inner side disk.
摘要:
The working fluid composition for a refrigerating machine of this invention comprises a base oil containing an ether-based compound, an amine salt of an acidic phosphoric acid ester, at least one compound selected from the group consisting of amine-based antioxidants, metal inactivating agents and alicyclic epoxy compounds, and an unsaturated fluorinated hydrocarbon refrigerant. The refrigerating machine oil of the invention comprises a base oil containing an ether-based compound, an amine salt of an acidic phosphoric acid ester, and at least one compound selected from the group consisting of amine-based antioxidants, metal inactivating agents and alicyclic epoxy compounds, and it is to be used together with an unsaturated fluorinated hydrocarbon refrigerant.
摘要:
A toroidal continuously variable transmission of the present invention comprises: input side disks (1a, 1b) and output side disks (6) being supported concentric with each other such that the disks can rotate freely; a trunnion (9) that comprises end sections (36) on both ends on which tilt shafts (13) that are concentric with each other are provided, and a support beam section (15) that extends between both end sections (36), the trunnion (9) being capable of pivotally displacing around the tilt shafts (13); a thrust rolling bearing (17); and a power roller (8) that is supported to the inside surface of the trunnion (9) by way of the thrust rolling bearing (17) such that it rotates freely; wherein the support beam section (15) comprises an inside surface having a cylindrical convex surface (14); the thrust rolling bearing (17) comprises an outer race (18a) having an outside surface with a concave section (19a) that fits with the cylindrical convex surface (14) of the support beam section (15), and a plurality of rolling bodies (26) that are located between the power roller (8) and a track of an outer race (18a); and the concave section (19a) of the outer race (18a) has side surface sections (29) on both sides in the width direction, fits with the cylindrical convex surface (14) by the cylindrical convex surface (14) coming in contact with both side surface sections (29).