Abstract: A method of designing a gear in which a tooth trace of the tooth flank, which is to be engaged with another mating tooth flank, is curved with respect to an axial direction of the body of the gear. The mating tooth flank of the mating gear is designed in such a manner that a desired tooth contact can be achieved. Accordingly, sufficient design precision can be attained. Furthermore, stress at the tooth flanks can be controlled when the gears are engaged with each other, thereby leading to high durability of the gears.

Abstract: The present invention is a fusion-bonded product having a high-strength part, comprising: a first preform (2a) constituted by integrally, frictionally pressure-welding a first low-carbon steel part (L1) made of low-carbon steel containing less than 0.45% of C and a high-carbon steel part (H) made of high-carbon steel containing not less than 0.45% of C; and a second preform (2b) having a second low-carbon steel part (L2) made of second low-carbon steel containing less than 0.45% of C; wherein the high-carbon steel part (H) of the first preform (2a) is provided with a high-strength part (9) that has been previously formed into a desired shape and quenched, the second low-carbon steel part (L2) of the second preform (2b) has been previously formed into a predetermined shape, and the first low-carbon steel part (L1) of the first preform (2a) and the second low-carbon steel part (L2) of the second preform (2b) are bonded to each other by fusion welding.

Abstract: A press assembly including a die assembly having a trim die defining an annular cavity wherein the trim die is fixed to the press assembly, a punch assembly including a trim punch having an annular boss that is correspondingly shaped to the annular cavity, wherein the trim punch is movable relative to the die assembly, and an ejector assembly including an ejector arm, wherein the ejector arm is mounted to the punch assembly. The object is pressed into the annular cavity of the trim die by the annular boss of the trim punch when the annular boss is slidably received in the annular cavity, and the ejector arm pushes the object upwardly within the annular cavity of the trim die when the annular boss of the trim punch is removed from the annular cavity.

Abstract: A forming method of a tooth trace of a gear according to the present invention includes: a first step of preparing a preformed gear made of metal including a cylindrical main body and a tooth part having a flat tooth flank having a uniform thickness in a tooth trace direction inside of the main body; and a second step of conducting a surface treatment locally to an outside surface of the main body in order to deform the outside surface of the main body in such a manner that the same becomes concave, so that a crowning bulging in the tooth trace direction is formed on the tooth flank of the tooth part.

Abstract: The present invention is a fusion-bonded product having a high-strength part, comprising: a first preform (2a) constituted by integrally, frictionally pressure-welding a first low-carbon steel part (L1) made of low-carbon steel containing less than 0.45% of C and a high-carbon steel part (H) made of high-carbon steel containing not less than 0.45% of C; and a second preform (2b) having a second low-carbon steel part (L2) made of second low-carbon steel containing less than 0.45% of C; wherein the high-carbon steel part (H) of the first preform (2a) is provided with a high-strength part (9) that has been previously formed into a desired shape and quenched, the second low-carbon steel part (L2) of the second preform (2b) has been previously formed into a predetermined shape, and the first low-carbon steel part (L1) of the first preform (2a) and the second low-carbon steel part (L2) of the second preform (2b) are bonded to each other by fusion welding.

Abstract: A ball joint includes: a ball stud having a spherical ball part and a shank part extending from the spherical ball part; a bearing cupping the spherical ball part of the ball stud; and a housing holding the bearing therein. The housing is provided with a recess in an inner surface thereof. The bearing deforms to enter into the recess of the housing in such a manner that a space is formed between the bearing and the spherical ball part.

Abstract: A shearing device including a retainer having a mountain-shaped inclined surface on its top and fixed in a standing posture, a plurality of side punches each having an operating surface on one side thereof. The side punches are arranged in a radial pattern with the respective operating surfaces directed outward and are placed in a standing posture on the inclined surface so as to be slidable. A cylindrical die is disposed to surround the side punches and has in its peripheral wall punch apertures facing the respective operating surfaces of the side punches. An actuator is provided for pushing the side punches and the die to simultaneously move downward.

Abstract: A one-way clutch of the invention includes an inner race supported for rotation on a power transmission shaft, an outer race concentrically surrounding the inner race, and torque transmitting members interposed between the inner race and the outer race and capable of transmitting torque in one direction of the inner race to the outer race. The outer race is integrally provided with an extending portion that extends inwardly in a radius direction thereof. The extending portion is capable of being engaged with the power transmission shaft.

Abstract: A one-way clutch of the invention includes an inner race supported for rotation on a power transmission shaft, an outer race concentrically surrounding the inner race, and torque transmitting members interposed between the inner race and the outer race and capable of transmitting torque in one direction of the inner race to the outer race. The outer race is integrally provided with an extending portion that extends inwardly in a radius direction thereof. The extending portion is capable of being engaged with the power transmission shaft.

Abstract: A ball joint includes: a ball stud having a spherical ball part and a shank part extending from the spherical ball part; a bearing cupping the spherical ball part of the ball stud; and a housing holding the bearing therein. The housing is provided with a recess in an inner surface thereof. The bearing deforms to enter into the recess of the housing in such a manner that a space is formed between the bearing and the spherical ball part.

Abstract: The joint assembly 1 for a car steering system has a first ball joint 11, a tubular collar 25, an elastic member 26 and a second ball joint 21. The first ball joint 11 has a stem 13 provided with a recess 13a. The tubular collar 25 has a protrusion 25a at an inside thereof and provided around the stem 13 in such a manner that the protrusion 25a confronts the recess 13a. The elastic member 26 is provided between the recess 13a of the stem 13 and the protrusion 25a of the collar 25. The second ball joint 21 has a hole 19 for accommodating the collar 25 covering the stem 13. According to the joint assembly 1, vibration generated at the wheel 71 is absorbed by the elastic member 26 and seldom gives the driver uncomfortableness or causes the driver to err in driving the car.

Abstract: A ball joint of the present invention joins a pair of members so that relative pivotal movement of the pair of members is permitted. The ball joint comprises a ball stud to be connected to one of the pair of members, a bearing support rod to be connected to the other member, and a cup-shaped bearing for supporting the ball stud on the rod. The bearing is formed of an elastic polymeric material and has an expandable open end to permit the ball of the ball stud to be put in and taken out of a hollow defined by the spherical inner surface of the bearing through the open end. The opposite ends of a rod forming the bearing support rod is bent in a ring-shaped heads, respectively. When the bearing is fitted in the ring-shaped head, the ring-shaped head compresses the bearing so that the ball of the ball stud is unable to come off the bearing.

Abstract: A ball-and-socket joint used in a linkage mechanism of the motor vehicle steering device has a ball head of a shank, encompassed by a bearing in a housing. The housing has an end opening at the opposite side of the shank. A joining member made up of a head part and a male screw portion is fitted in the opening at the head part. The head part is integrally formed with a peripheral flange, preferably a flange of flared shape. The surface of the flange is covered with an elastic layer. A fixing ring abuts against the flange to prevent detachment of the joining member from the housing. A closure plate may be interposed between the flange and the bearing and between the flange and the housing. Vibration and shocks imparted to the ball head through the shank is absorbed by the elastic layer without increasing the diametrical dimension of the joint.

Abstract: A ball-and-socket joint has a ball shell of basically spherical shape, a ball stud with a ball head integrally formed at an extremity thereof and disposed within the ball shell, and a rubber layer interposed between and joining the ball shell and the ball head. The outer surface area of the ball shell on the distal side, remote from a shank of the ball stud, of an equatorial plane passing through the center of the ball head perpendicularly to the ball stud axis is greater than the outer surface area of the remainder of the ball shell on the other, or proximal, side of the equatorial plane. The rubber layer is, therefore, made thicker at parts thereof calculated to withstand loads transmitted between the ball shell and the ball head.

Abstract: A built-up camshaft is fabricated by fitting cam disks on a hollow shaft, fitting shaft end caps over the ends of the hollow shaft, placing the resulting structure in a die, compressing the hollow shaft in the axial direction thereof inwardly from the opposite ends thereof thereby to carry out swaging tube expansion thereof to place all parts in a temporarily fixed state, and introducing a fluid under pressure into the hollow shaft thereby to carry out bulging and expansion of diameter at specific parts of the hollow shaft and obtain an integral built-up camshaft.

Abstract: A ball and socket joint for automotive wheel suspensions or the like has a ball stud extending into a housing through its open end. The ball end of the ball stud rotatably bears against a load carrying bearing and a wear takeup bearing within the housing, in which is also mounted a spring urging the wear takeup bearing toward the load carrying bearing. The wear takeup bearing has a protuberance extending through an aperture in a cover closing the housing end opposite to its open end. Fitted over the protuberance, a wear indicator cap is normally engaged therewith in a position close to the housing cover and is sprung or otherwise preloaded in a direction away therefrom. When the protuberance recedes into the housing to such an extent that the wear of the joint exceeds an acceptable limit, the wear indicator cap travels from the housing under the preload and comes to a stop on the distal end of the protuberance, indicating the wear of the joint in a greatly amplified, visually recognizable manner.

Abstract: A ball-and-socket joint is protected in sealed state by a boot firmly secured at its outer end to the ball stud of the ball and at its inner end to the joint assembly by a clamping ring made of an elastic material in the form of a coil wound spirally with rectangular-section winding turns thereof lying adjacently side-by-side in the plane of the clamping ring. The spirally-coiled construction, in contrast to a helically-coiled construction, of the clamping ring permits it to be expanded greatly at the time of its fitting in the boot groove for assembly with little permanent deformation, whereby a great clamping force is obtainable.

Abstract: An easy-to-assemble compressor having a pair of parallel, double-headed pistons reciprocably mounted in respective cylinder chambers in a compressor housing. The pistons are mounted on a crankshaft via Scotch-yoke-type sliders slidably engaged in the respective pistons for reciprocating movement in a direction normal to the piston axis. The sliders convert the rotation of the crankshaft into linear reciprocation of the pistons. The dimensions of these sliders are determined in relation to the other parts of the compressor so that, during the assemblage of the compressor, the sliders may be mounted in position by being passed over the opposite end portions of the crankshaft following the mounting of the pistons and crankshaft within the housing.

Abstract: The ball joint for the suspension system of automobiles, in which as a load-supporting seat, a multi-layer material provided with the synthetic resin layer having self-lubricating ability and abrasion resistance is used on the surface of the back metal, while as an opposite seat to a ball stud, synthetic resin having self-lubricating ability and wear resistance is used, and constituted so as to keep securely load support applied on the ball head by both seats.