Abstract:
A formation method of a coating that coats a coated body with the coating includes: generating cylindrical plasma in a vacuum deposition chamber as well as supplying material gas into the vacuum deposition chamber; applying pulse voltage to the coated body; and attaching a shield member that shields an uncoated member to an uncoated part where the coating of the coated body is not formed with separation spacing over a coated part where the coating is to be formed for preventing decrease of hardness of the coating in the coated part.
Abstract:
A plurality of microscopic grooves are created on the surface of the teeth of planetary gears, and thus, irregular unevenness is created. This irregular unevenness includes a plurality of first microscopic grooves which function as lubricant grooves and a plurality of second microscopic grooves which are shallower than the first microscopic grooves.
Abstract:
A spline shaft that can suppress occurrence of stick slip by measures other than just simply making the surface roughness smaller. The spline shaft includes a first shaft with an outer-peripheral spline formed, and a second shaft with an inner-peripheral spline, which engages with the outer-peripheral spline peripherally and that is made slidable axially, formed. And, at least either one of the outer-peripheral spline and the inner-peripheral spline includes a substrate whose surface is formed to a predetermined surface roughness, and an amorphous carbon-system hard thin film, which coats and forms the surface of substrate.
Abstract:
The invention provides a lubricating oil composition comprising a lubricating base oil, a phosphorus compound and at least one organic acid salt selected from among alkaline earth metal sulfonates, alkaline earth metal phenates and alkaline earth metal salicylates, wherein the contents of the phosphorus compound and organic acid salt satisfy the conditions represented by the following formulas (1) to (3). In formulas (1)-(3), W(P) represents the content of phosphorus compound, in terms of phosphorus element, based on the total amount of the lubricating oil composition, and W(M) represents the content of organic acid salt content, in terms of alkaline earth metal elements, based on the total amount of the lubricating oil composition. 0.01≦W(P)≦0.2 (1) 0.01≦W(M)≦0.2 (2) 0.1≦W(P)/W(M)≦10 (3)
Abstract:
A constant velocity universal joint includes an inner race having an outer peripheral face on which inner grooves are formed, an outer race having an inner peripheral face on which outer grooves are formed, a plurality of balls each engaging with each pair of inner groove and outer groove, and an annular cage disposed between the inner race and the outer race and including window portions for retaining respective balls. A coefficient of sliding friction between the ball and a rolling face on the inner groove with which the ball is in contact, and a coefficient of sliding friction between the ball and a rolling face on the outer groove with which the ball is in contact are larger than a coefficient of sliding friction between the ball and a sliding face on the window portion with which the ball is in contact.
Abstract:
A propeller shaft includes a first shaft and a second shaft. The first shaft has a torque transmission face in which a plurality of fine grooves extending in a first direction (face width direction) is formed. The second spline shaft is coupled to the first spline shaft so as to be movable relative to the first spline shaft in the axial direction of the first spline shaft, and has a torque transmission face in which a plurality of second fine grooves extending in a second direction that crosses the first direction is formed.
Abstract:
A lubricating oil used in a friction-type drive power transmission apparatus which includes: at least one of two additives; a first additive selected from at least one of an aliphatic amine having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 1) and an aliphatic amine ethylene oxide adduct having a saturated or unsaturated hydrocarbon group with a carbon number of 12 to 20 (Chemical Formula 2).
Abstract:
To control initial shudder in a wet paper friction plate, the frictional sliding surface of a wet paper friction member is preconditioned by frictional sliding contact with a mating plate until its bearing length ratio tp at a cutting depth of 10 μm is in the range from 70 to 85%. The preconditioning is optionally preceded by grinding, preferably before the wet paper friction member is attached to a base plate.
Abstract:
A motorcycle having an engine with a built-in dynamo therein is provided with a second dynamo in addition to the first dynamo. This second dynamo is used for purposes other than that for the driving of a vehicle. This second dynamo is installed outside of the engine and driven by the engine through a belt transmission device. Provision is made to establish a driving relation between the second dynamo and the engine, or to disconnect such relation.The belt transmission device is covered with a cover having an air inlet port, a cooling fan is mounted on a rotor shaft of the second dynamo, and the belt transmission device is compulsorily cooled by air flowing from the air inlet port to the second dynamo.A socket for taking off the output of the second dynamo is provided on the vehicle body.The motorcycle includes a vehicle body having a main frame and a lower frame extending in a generally parallel relation with respect to each other. The engine is supported on the lower frame. The second dynamo is positioned in a space above this engine and under the main frame.
Abstract:
A sliding member has a base material whose surface is at least partially covered with a DLC film, wherein an intermediate layer is interposed between the base material and the DLC film, and the intermediate layer has a multilayer structure obtained by stacking a first Cr layer, a CrN layer and a second Cr layer successively from the side closer to the base material.