Abstract: A bearing support structure in which a split rolling bearing split into two in a peripheral direction is mounted on the outer periphery of a rotatable shaft member, the shaft member includes a cylindrical shaft portion, and a first side surface and a second side surface that face each other in an axial direction with the shaft portion sandwiched therebetween and that extend in a substantially radial direction, and at least one of the first side surface and the second side surface is inclined with respect to a plane orthogonal to a central axis of the shaft member.

Abstract: A rolling bearing attachment structure for attaching a rolling bearing to a journal portion of a crankshaft includes: the rolling bearing; and the crankshaft. The rolling bearing is attached to an outer peripheral surface of the journal portion, and includes: a pair of two-split inner rings which are split into two portions in a circumferential direction; a pair of two-split outer rings which are provided on a radial direction outer side of the two-split inner rings and are split into two portions in the circumferential direction; a plurality of rolling elements rotatably provided between the pair of two-split outer rings and the pair of two-split inner rings; and a cage which holds the plurality of rolling elements at substantially equal intervals in the circumferential direction.

Abstract: A cam follower device includes: a bearing holding member that has a pair of opposing side walls disposed with a space therebetween and that is arranged with respect to a cam provided on a camshaft; a support shaft inserted into insertion holes provided coaxially in each of the pair of opposing side walls; an outer ring that has the support shaft inserted therethrough, is disposed between the pair of opposing side walls, and faces the cam; an inner ring formed by an outer peripheral surface of the support shaft; and a plurality of rollers disposed in an annular gap between the outer ring and the inner ring.

Abstract: There is provided a rolling bearing which inhibits spalling of a rolling element and has a long service life even under rigorous environments. The rolling bearing comprises grease for lubricating rolling contact parts and/or sliding contact parts between a first raceway surface and a rolling elements and/or between a second raceway surface and a rolling elements, wherein the grease comprises a base oil, a thickener and an extreme pressure additive, the thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, an amount of cyclohexylamine in the total amount of the alkylphenylamine and cyclohexylamine is from 91 to 99% by mole, and a reaction temperature of the extreme pressure additive with iron is 260° C. or lower.

Abstract: An axial lip is formed on a side surface of a seal of a rolling bearing which faces a slinger so as to expand outwards of the bearing. A projecting portion is formed on a flat surface of the slinger which faces the seal by flexing the slinger in an axial direction so as to cause the slinger to project inwards of the bearing, and a distal end of the axial lip is brought into contact with the flat surface of the slinger in a position lying further radially outwards than the projecting portion on the slinger. A radially inward inner surface of the axial lip of the axial lip and a radially outer side sloping surface formed radially outwards of the projecting portion on the slinger form a labyrinth, and a portion of the side surface of the seal which lies further radially inwards than the position where the axial lip is formed and an apex portion of the projecting portion on the slinger form a labyrinth.

Abstract: In a sealing device for a bearing, a sub-seal lip is configured such that a slide contact surface is formed like an annular band. As the rotation speed of the bearing increases, the width of the slide contact surface is reduced by a centrifugal force. Thus, sliding friction can effectively be minimized. The torque of the bearing can be prevented from increasing at high-speed rotation. Even when the centrifugal force increases somewhat, only reduction in the width of the slide contact surface is caused. Thus, a slide-contacted state can be maintained. Consequently, the problem of floating-up of the sub-seal lip from a slinger is difficult to occur.

Abstract: There is provided a rolling bearing which inhibits spalling of a rolling element and has a long service life even under rigorous environments. The rolling bearing comprises grease for lubricating rolling contact parts and/or sliding contact parts between a first raceway surface and a rolling elements and/or between a second raceway surface and a rolling elements, wherein the grease comprises a base oil, a thickener and an extreme pressure additive, the thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, an amount of cyclohexylamine in the total amount of the alkylphenylamine and cyclohexylamine is from 91 to 99% by mole, and a reaction temperature of the extreme pressure additive with iron is 260° C. or lower.

Abstract: An axial lip is formed on a side surface of a seal of a rolling bearing which faces a slinger so as to expand outwards of the bearing. A projecting portion is formed on a flat surface of the slinger which faces the seal by flexing the slinger in an axial direction so as to cause the slinger to project inwards of the bearing, and a distal end of the axial lip is brought into contact with the flat surface of the slinger in a position lying further radially outwards than the projecting portion on the slinger. A radially inward inner surface of the axial lip of the axial lip and a radially outer side sloping surface formed radially outwards of the projecting portion on the slinger form a labyrinth, and a portion of the side surface of the seal which lies further radially inwards than the position where the axial lip is formed and an apex portion of the projecting portion on the slinger form a labyrinth.

Abstract: In a sealing device for a bearing, a sub-seal lip is configured such that a slide contact surface is formed like an annular band. As the rotation speed of the bearing increases, the width of the slide contact surface is reduced by a centrifugal force. Thus, sliding friction can effectively be minimized. The torque of the bearing can be prevented from increasing at high-speed rotation. Even when the centrifugal force increases somewhat, only reduction in the width of the slide contact surface is caused. Thus, a slide-contacted state can be maintained. Consequently, the problem of floating-up of the sub-seal lip from a slinger is difficult to occur.

Abstract: A pressure regulating valve which is comprised of a valve body being comprised of a cylinder, a spool slidably disposed in the cylinder with a clearance, the spool and the cylinder defining a pressure chamber and a space portion, and an urging member which urges the spool in a direction opposite to a direction of a force applied to the spool by fluid pressure in the pressure chamber. A supply passage fluidly communicates the cylinder and a fluid pressure supply source, and a drain passage fluidly communicates the cylinder and a sump. A through-passage formed in the spool fluidly communicates the pressure chamber and the space portion. An orifice disposed between the space portion and a sump limits a flow rate of fluid drained from the space portion to the sump. The spool is made of material having a lower thermal expansion coefficient than material of the valve body.

Abstract: A pressure regulating valve which is comprised of a valve body being comprised of a cylinder, a spool slidably disposed in the cylinder with a clearance, the spool and the cylinder defining a pressure chamber and a space portion, and an urging member which urges the spool in a direction opposite to a direction of a force applied to the spool by fluid pressure in the pressure chamber. A supply passage fluidly communicates the cylinder and a fluid pressure supply source, and a drain passage fluidly communicates the cylinder and a sump. A through-passage formed in the spool fluidly communicates the pressure chamber and the space portion. An orifice disposed between the space portion and a sump limits a flow rate of fluid drained from the space portion to the sump. The spool is made of material having a lower thermal expansion coefficient than material of the valve body.

Abstract: A polypropylene based composition for an acoustic vibration sheet having superior acoustic adhesion and high-impact properties to those of conventional products, and an acoustic vibration sheet prepared from the composition are provided; the composition is obtained by blending 100 parts by weight of a polypropylene having a crystallinity of 0.94 or more and a Q value of 10 or more with 1 to 15 parts by weight of a thermoplastic styrene block copolymer rubber, and if necessary, further blending 10 to 40 parts by weight of a filler with the above-mentioned two components.

Abstract: A polyolefin resin composition which is suitable mainly for affording superior processing properties of sheet and little in the variation of flowability at hot processing temperatures is provided.The composition comprises (A) a resin mixture comprising a polypropylene resin and a polyethylene resin, the respective percentages by weight of these resins in the mixture being specified, (B) a polyolefin resin modified with a polymerizable unsaturated carboxylic acid, its salt or its ester by graft polymerization and (C) finely divided vegetable fibers, the ratio of (A) to (B) and the content of (C) in the composition being both specified. Further an agent (D) may be added to the composition, such as petroleum resin, rosin, rosin-like resin, plasticizer or inorganic filler.

Abstract: A polyolefin resin composition having superior strength, rigidity, workability, dimensional stability, etc. is provided by blending 0.3 to 4.0% by weight of at least one member selected from rosins, similar materials to rosins, derived therefrom, petroleum resins and mixtures of the foregoing members, 0.5 to 4.0% by weight of a plasticizer and 15 to 60% by weight on dry basis, of finely ground vegetable fibers to a polyolefin resins or resins, all of the above percentages being based on the weight of the composition. Further, 1 to 30% by weight of an inorganic filler and/or 1 to 10% by weight of a synthetic rubber can be blended thereto.